A Novel Protective Prion Protein Variant that Colocalizes with Kuru Exposure
Open accessAbstract
BACKGROUND: Kuru is a devastating epidemic prion disease that affected a highly restricted geographic area of the Papua New Guinea highlands; at its peak, it predominantly affected adult women and children of both sexes. Its incidence has steadily declined since the cessation of its route of transmission, endocannibalism. METHODS: We performed genetic and selected clinical and genealogic assessments of more than 3000 persons from Eastern Highland populations, including 709 who participated in cannibalistic mortuary feasts, 152 of whom subsequently died of kuru. RESULTS: Persons who were exposed to kuru and survived the epidemic in Papua New Guinea are predominantly heterozygotes at the known resistance factor at codon 129 of the prion protein gene (PRNP). We now report a novel PRNP variant--G127V--that was found exclusively in people who lived in the region in which kuru was prevalent and that was present in half of the otherwise susceptible women from the region of highest exposure who were homozygous for methionine at PRNP codon 129. Although this allele is common in the area with the highest incidence of kuru, it is not found in patients with kuru and in unexposed population groups worldwide. Genealogic analysis reveals a significantly lower incidence of kuru in pedigrees that harbor the protective allele than in geographically matched control families. CONCLUSIONS: The 127V polymorphism is an acquired prion disease resistance factor selected during the kuru epidemic, rather than a pathogenic mutation that could have triggered the kuru epidemic. Variants at codons 127 and 129 of PRNP demonstrate the population genetic response to an epidemic of prion disease and represent a powerful episode of recent selection in humans.
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Claims the paper makes
3 of 16 cited sources checked · 1 supported · 0 flagged · accuracy not yet measured
- Premisecitation
A crystal structure of human PrP shows that interactions between neighboring PrP molecules are mediated by homotypic contacts between residues around position 129, leading to a four-strand intermolecular beta-sheet.
“A crystal structure of human PrP shows that interactions between neighboring PrP molecules are mediated by homotypic contacts between residues around position 129, leading to a four-strand intermolecular β-sheet.28”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [28] source
- Premisecitation
There are few examples of mutations that are causative of autosomal dominant neurodegenerative disease achieving the polymorphic frequency observed in the Purosa valley.
“However, there are few examples of mutations that are causative of autosomal dominant neurodegenerative disease achieving the polymorphic frequency observed in the Purosa valley.29”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [29] source
The paper identifies Huntington’s disease as an autosomal dominant neurodegenerative disease and describes the Venezuelan kindreds as the world’s largest genetically related HD community (opening section; Discussion, page unavailable). It therefore supplies an example of a large affected community, but it does not establish that such mutations rarely reach polymorphic frequency or compare their frequency with that in the Purosa valley. (LLM, conf=0.79)
Experimental — accuracy not yet measured
- Findingown data
In the 546 persons from low-exposure zones, the codon 129 allele count did not differ significantly from that in the kuru region.
“The codon 129 allele count did not differ significantly from that in the kuru region.”
Quote in the paperNot a substantial claim- Rests on an assumption: The exposure index based on participation in mortuary feasts is a valid measure of exposure to kuru.
- Findingown data
A novel PRNP variant G127V was found exclusively in people who lived in the region in which kuru was prevalent.
“We now report a novel PRNP variant -G127V -that was found exclusively in people who lived in the region in which kuru was prevalent”
Quote in the paperSubstantial claim - Findingown data
Genealogic analysis reveals a significantly lower incidence of kuru in pedigrees that harbor the protective allele than in geographically matched control families.
“Genealogic analysis reveals a significantly lower incidence of kuru in pedigrees that harbor the protective allele than in geographically matched control families.”
Quote in the paperSubstantial claim
- Findingown data
G127V was present in half of the otherwise susceptible women from the region of highest exposure who were homozygous for methionine at PRNP codon 129.
“and that was present in half of the otherwise susceptible women from the region of highest exposure who were homozygous for methionine at PRNP codon 129.”
Quote in the paperSubstantial claim - Findingown data
The PRNP codon 129 polymorphism is common across the Eastern Highlands Province.
“The PRNP codon 129 polymorphism is common across the Eastern Highlands Province.”
Quote in the paperNot a substantial claim - Findingown data
Areas outside the Eastern Highlands Province, including coastal and inland regions of Papua New Guinea and neighboring islands, have a low frequency of the 129V allele, similar to the frequency in the rest of southeast Asia and the Pacific Islands.
“Areas outside the Eastern Highlands Province, including coastal and inland regions of Papua New Guinea and neighboring islands, have a low frequency of the 129V allele, similar to the frequency in the rest of southeast Asia and the Pacific Islands (Fig. 1) and in marked contrast to the frequency in the Eastern Highlands Province (P<0.001 by a two-tailed chi-square test) (Table 1).”
Quote in the paperSubstantial claim - Findingown data
In Highland populations with no recorded kuru, the 129V allele frequency differs significantly from that in the kuru-exposed region (P=0.04, two-tailed chi-square test).
“Highland populations with no recorded kuru (red) comprised Agarabi (90 persons), Asaro (26), Bena Bena (46), Gadsup (42), Gahuku (91), Labogai (65), Morae (an Anga linguistic group, 43), Siane (68), Tairora (68), and Yabiyufa (92) (P = 0.04 for the comparison of allele frequency with the frequency in the kuru-exposed region, by a two-tailed chisquare test).”
Quote in the paperSubstantial claim- Rests on an assumption: The exposure index based on participation in mortuary feasts is a valid measure of exposure to kuru.
- Findingown data
The young population in kuru-exposed areas has a higher frequency of the 129V allele than do adjacent unexposed populations of the Eastern Highlands Province (0.57 vs. 0.52).
“The young population in kuru-exposed areas has a higher frequency of the 129V allele than do adjacent unexposed populations of the Eastern Highlands Province (0.57 vs. 0.52) (Fig. 1, and Table 2 in the Supplementary Appendix).”
Quote in the paperSubstantial claim - Findingown data
An increasing cline in PRNP 129V allele frequency centers on the kuru region.
“An increasing cline in 129V frequency centers on the kuru region.”
Quote in the paperSubstantial claim- Rests on an assumption: The exposure index based on participation in mortuary feasts is a valid measure of exposure to kuru.
- Findingown data
A novel PRNP coding change, G127V (c.380G→T, CCDS13080.1), is present.
“we now report a novel PRNP coding change, G127V (c.380G→T, CCDS13080.1),which is located in a highly conserved and structured region of PrP.”
Quote in the paperSubstantial claim - Findingown data
Persons who were exposed to kuru and survived the epidemic in Papua New Guinea are predominantly heterozygotes at codon 129 of PRNP.
“Persons who were exposed to kuru and survived the epidemic in Papua New Guinea are predominantly heterozygotes at the known resistance factor at codon 129 of the prion protein gene (PRNP).”
Quote in the paperSubstantial claim - Findingown data
An increasing cline in the frequency of the 129V allele centers on the kuru-exposed region.
“An increasing cline in the frequency of the 129V allele thus centers on the kuru-exposed region (Fig. 1).”
Quote in the paperSubstantial claim - Findingown data
The 127V polymorphism was not found in any of the patients with kuru (P = 0.006 by Fisher's exact test for the comparison with elderly women in midexposure and high-exposure villages).
“The 127V polymorphism was not found in any of the patients with kuru (P = 0.006 by Fisher's exact test for the comparison with elderly women in midexposure and high-exposure villages).”
Quote in the paperSubstantial claim - Findingown data
Persons in the kuru region could be readily distinguished from adjacent unexposed populations (282 persons, P<0.001).
“but persons in the kuru region could be readily distinguished from adjacent unexposed populations (282 persons, P<0.001) (Fig. 3 in the Supplementary Appendix).”
Quote in the paperSubstantial claim - Findingown data
A stratum of men born between 1950 and 1960 show distortion in Hardy-Weinberg equilibrium (P = 0.02).
“A stratum of men born between 1950 and 1960, who would have been young children in the final decade of the practice of mortuary feasts, do show distortion in Hardy-Weinberg equilibrium (P = 0.02 by an exact method with the use of PLINK).”
Quote in the paperSubstantial claim - Findingown data
No persons with the 127V polymorphism (51 persons from 32 families; mean age, 35 years; range, 16 to 78 years; 11 persons 50 years of age or older) had clinical evidence of neurodegenerative disease.
“No persons with the 127V polymorphism (51 persons from 32 families; mean age, 35 years; range, 16 to 78 years; 11 persons 50 years of age or older) had clinical evidence of neurodegenerative disease.”
Quote in the paperSubstantial claim - Findingown data
The 127V polymorphism was invariably linked to a 129M allele.
“The 127V polymorphism was invariably linked to a 129M allele and was geographically restricted to the Purosa valley and neighboring villages (Fig. 2).”
Quote in the paperSubstantial claim - Findingown data
With the exception of Agakamatasa and Ilesa with moderate exposure (exposure index >100), all 127V pedigrees, including those among Ai, Ivaki, Kalu, Kamira, Ketabi, Mugaiamuti, Purosa-Takai, Takai, Waisa, and Wanitabi, were found in the region of highest kuru exposure (exposure index >200).
“With the exception of Agakamatasa and Ilesa with moderate exposure (exposure index >100), all pedigrees, including those among Ai, Ivaki, Kalu, Kamira, Ketabi, Mugaiamuti, Purosa-Takai, Takai, Waisa, and Wanitabi, were found in the region of highest kuru exposure (exposure index >200).”
Quote in the paperSubstantial claim - Findingown data
More recent genetic data confirm the effect of balancing selection at codon 129 in an additional 450 persons from the exposed population born before 1960.
“Our more recent genetic data confirm this effect in an additional 450 persons from the exposed population born before 1960.”
Quote in the paperSubstantial claim - Findingown data
The 127V polymorphism was geographically restricted to the Purosa valley and neighboring villages.
“The 127V polymorphism was invariably linked to a 129M allele and was geographically restricted to the Purosa valley and neighboring villages (Fig. 2).”
Quote in the paperSubstantial claim - Findingown data
A point estimate for the time to the most recent common ancestor of 127V was 10 generations (95% CI, 7 to 15).
“A point estimate for the time to the most recent common ancestor of 127V was 10 generations (95% CI, 7 to 15) (see Methods in the Supplementary Appendix for similar estimates with the use of an alternative method).”
Quote in the paperSubstantial claim - Findingown data
In the south Fore region, 127GV is a common genotype (frequency, 0.08).
“In this part of the south Fore region, 127GV is a common genotype (frequency, 0.08).”
Quote in the paperNot a substantial claim - Findingown data
The frequency of the 129V allele outside the Eastern Highlands Province is in marked contrast to the frequency in the Eastern Highlands Province (P<0.001).
“Areas outside the Eastern Highlands Province, including coastal and inland regions of Papua New Guinea and neighboring islands, have a low frequency of the 129V allele, similar to the frequency in the rest of southeast Asia and the Pacific Islands (Fig. 1) and in marked contrast to the frequency in the Eastern Highlands Province (P<0.001 by a two-tailed chi-square test) (Table 1).”
Quote in the paperSubstantial claim - Premisecitation
There was Hardy-Weinberg disequilibrium of the codon 129 genotype in a small cohort of older Fore women who had participated in multiple mortuary feasts.
“We previously reported that there was Hardy-Weinberg disequilibrium of the codon 129 genotype in a small cohort of older Fore women who had participated in multiple mortuary feasts.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [12] source
- Premisecitation
Codon 129 heterozygosity is protective against the development of iatrogenic and sporadic Creutzfeldt-Jakob disease and kuru.
“Codon 129 heterozygosity is protective against the development of iatrogenic 8 and sporadic 9 Creutzfeldt-Jakob disease and kuru 3,[10][11][12] ;”
Quote in the paperSubstantial claim0 of 3 sources checked - Interpretationown data
The 127V-associated haplotype on chromosome 20 and the highly restricted geographic distribution of the variant suggest that there is a very recent common ancestor that slightly predates the estimates of the onset of the kuru epidemic based on recollections of elderly Fore group members.
“The 127V-associated haplotype on chromosome 20 and the highly restricted geographic distribution of the variant suggest that there is a very recent common ancestor that slightly predates the estimates of the onset of the kuru epidemic that are based on recollections of the elderly members of the Fore group.”
Quote in the paperSubstantial claim- Rests on an assumption: Estimates of the onset of the kuru epidemic based on recollections of elderly Fore group members are accurate.
- Study design and conductown data
Genomic control method applied to 1039 neutral SNPs showed results not compatible with the presence of population stratification (inflation factor, 1.09; 95% CI, 0.98 to 1.20).
“Again the results are not compatible with the presence of population stratification (inflation factor, 1.09; 95% confidence interval [CI], 0.98 to 1.20).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [24] source
- Interpretationown data
These data support the conclusion that G127V in the heterozygous state confers resistance to kuru.
“These data support the conclusion that G127V in the heterozygous state confers resistance to kuru.”
Quote in the paperSubstantial claim - Premisecitation
Prion propagation is favored by homologous PrP interactions.
“However, prion propagation is favored by homologous PrP interactions.9”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [9] source
- Interpretationown data
Heterozygosity at codon 127 provides strong, and possibly complete, resistance to kuru.
“Heterozygosity at codon 127 provides strong, and possibly complete, resistance to kuru.”
Quote in the paperSubstantial claim - Interpretationown data
Further evidence of the genetic effect of kuru on PRNP is provided by deviation from Hardy-Weinberg equilibrium.
“Further evidence of the genetic effect of kuru on PRNP is provided by deviation from Hardy-Weinberg equilibrium.”
Quote in the paperSubstantial claim - Study design and conductown data
Principal component analysis of 1039 neutral SNPs in patients with kuru, elderly women, and young controls from the kuru region showed no evidence of population stratification in the exposed region (P = 0.42 by EIGENSTRAT analysis for the comparison of patients with kuru with elderly women in mid-exposure and high-exposure villages).
“Principal component analysis of 1039 neutral single-nucleotide polymorphisms (SNPs) in 143 patients with kuru, 125 elderly women in midlevel-exposure and high-exposure villages, and 282 young controls from the kuru region showed no evidence of population stratification in the exposed region (P = 0.42 by EIGENSTRAT analysis for the comparison of patients with kuru with elderly women in mid-exposure”
Quote in the paperSubstantial claim - Interpretationown data
The relative viability of combined codon 127-129 genotypes of PRNP in elderly persons from the kuru region suggests that there was stronger selection in this specific situation than in the classically quoted examples of endemic malaria and hemoglobin S or C alleles.
“The relative viability of combined codon 127-129 genotypes of PRNP in elderly persons from the kuru region suggests that there was stronger selection, in this specific situation, than that in the classically quoted examples of endemic malaria and hemoglobin S or C alleles.”
Quote in the paperSubstantial claim - Interpretationreasoning
If 127V had triggered kuru, the localization to the southeastern part of the Fore linguistic group would be inconsistent with oral history that recorded that the first kuru patient was observed in the Keiagana linguistic group, which is located to the northwest of the Fore region.
“Finally, if 127V had triggered kuru, the localization to the southeastern part of the Fore linguistic group would be inconsistent with oral history that recorded that the first kuru patient was observed in the Keiagana linguistic group, which is located to the northwest of the Fore region.”
Quote in the paperSubstantial claim- Rests on an assumption: Oral history that the first kuru patient was observed in the Keiagana linguistic group, northwest of the Fore region, is accurate.
- Interpretationreasoning
This supports the inference that selection pressure imposed by kuru in the 20th century inflated the frequency of the 127V allele in the Purosa valley from a very small number of carriers.
“This supports the inference that selection pressure imposed by kuru in the 20th century inflated the frequency of the 127V allele in the Purosa valley from a very small number of carriers.”
Quote in the paperSubstantial claim - Interpretationown data
Heterozygosity at codon 129 is associated with resistance to kuru.
“Heterozygosity is thus associated with resistance to kuru (since there is an excess of 129MV in elderly women who were resistant to kuru) and older age at onset of kuru (since there is an excess of 129MV in older patients with kuru).”
Quote in the paperSubstantial claim- Rests on an assumption: Elderly women from the kuru region who survived to old age were resistant to kuru.
- Study design and conductown data
There is insufficient power to show loss of Hardy-Weinberg equilibrium at codon 127 because there are expected to be extremely few persons homozygous for 127VV.
“although since there are expected to be extremely few persons who are homozygous for 127VV, we have insufficient power to show loss of Hardy-Weinberg equilibrium at codon 127.”
Quote in the paperNot a substantial claim - Interpretationown data
Heterozygosity at codon 129 is associated with older age at onset of kuru.
“Heterozygosity is thus associated with resistance to kuru (since there is an excess of 129MV in elderly women who were resistant to kuru) and older age at onset of kuru (since there is an excess of 129MV in older patients with kuru).”
Quote in the paperSubstantial claim - Interpretationreasoning
The finding that Hardy-Weinberg equilibrium is maintained in the cohort of men born in the 1940s or earlier might be explained if they had had low exposure to kuru when they participated in feasts as children.
“The finding that Hardy-Weinberg equilibrium is maintained in the cohort of men born in the 1940s or earlier might thus be explained if they had had low exposure to kuru when they participated in feasts as children.”
Quote in the paperSubstantial claim- Rests on an assumption: In traditional Fore society, boys older than approximately 7 years of age would no longer participate in the consumption of highly infectious material from mortuary feasts.
- Rests on an assumption: Kuru was transmitted through the consumption of highly infectious material from mortuary feasts.
- May combine two claims. 22
- Classified as probably not a substantial claim. 10
May combine two claims.
InterpretationcitationIn the folded PrP C conformation, residue 127 lies in a small beta-sheet, so the higher beta-propensity of valine might increase PrP C stability.
“In the folded PrP C conformation, which is the normal form of the protein, this residue lies in a small β-sheet, so the higher β-propensity of valine might increase PrP C stability.27”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [27] source
The study description and the section on effects of mutations examine beta-sheet propensities and stability in CD2.d1, not PrP C. Searches for PrP C residue 127 and for valine's beta-sheet propensity found no passage addressing the claimed structure or proposed stability effect. Page numbers were not available in our copy. (LLM, conf=0.76)
Experimental — accuracy not yet measured
May combine two claims.
Findingown dataThe G127V allele is common in the area with the highest incidence of kuru but is not found in patients with kuru or in unexposed population groups worldwide.
“Although this allele is common in the area with the highest incidence of kuru, it is not found in patients with kuru and in unexposed population groups worldwide.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataBoth 129MM and 129VV were associated with young persons with kuru, as compared with 129MV, which was associated with elderly women in midlevel-exposure and high-exposure zones (P = 3.5×10 -8 and P = 0.001).
“Both 129MM and 129VV were associated with young persons with kuru, as compared with 129MV, which was associated with elderly women in midlevel-exposure and high-exposure zones (P = 3.5×10 -8 and P = 0.001 for the comparison of the frequency of 129MM and 129VV, respectively, with the frequency of 129MV, by the chi-square test with 1 df).”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataNo deletions of the entire PRNP gene or PRNP promoter polymorphisms were detected.
“We did not detect deletions of the entire gene or PRNP promoter polymorphisms.”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown dataAmong patients with kuru younger than 20 years of age, 36 of 48 were homozygous for the PRNP open reading frame (127GG-129MM or 127GG-129VV), as compared with 36 of 125 elderly women (P = 3.4×10 -8) and 27 of 104 patients with kuru older than 20 years at onset (P = 1.2×10 -8).
“or 127GG-129VV), as compared with 36 of 125 elderly women (P = 3.4×10 -8 by the two-tailed chisquare test) and 27 of 104 patients with kuru who were older than 20 years of age at the onset of the disease (P = 1.2×10 -8 by the two-tailed chisquare test).”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataThe loss of Hardy-Weinberg equilibrium at codon 129 is not found in a stratum of slightly younger women born between 1950 and 1960, and was not detected in elderly men and unexposed elderly women.
“The loss of Hardy-Weinberg equilibrium at codon 129 is not found in a stratum of slightly younger women born between 1950 and 1960, which was the last period in which the dead were consumed at mortuary feasts, and was not detected in elderly men and unexposed elderly women.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataThe entire population of both sexes born before 1960 (480 persons in midlevel-exposure and high-exposure villages) shows marked loss of Hardy-Weinberg equilibrium at codon 129 (P = 4.6×10 -4), but not at codon 127.
“The entire population of both sexes born before 1960 (480 persons in midlevelexposure and high-exposure villages) shows marked loss of Hardy-Weinberg equilibrium at codon 129 (P = 4.6×10 -4 by an exact method with the use of the PLINK software program [http:// pngu.mgh.harvard.edu/~purcell/plink/],but not at codon 127”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataAmong persons born before 1960, 127V alleles were more likely to be found in otherwise susceptible 129MM homozygotes than in 129MV heterozygotes (P = 0.02), whereas 127V and 129M were in equilibrium in persons born after 1960.
“Among persons born before 1960, 127V alleles were more likely to be found in otherwise susceptible 129MM homozygotes than in 129MV heterozygotes (P = 0.02), whereas 127V and 129M were in equilibrium in persons who were born after 1960.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataAs assessed with the PHASE software for haplotyping, 25 of 51 127V chromosomes share an identical microsatellite haplotype across the region, and the same haplotype was found in only 1 of 69 127G chromosomes.
“As assessed with the use of the PHASE software for haplotyping, 25 of 51 127V chromosomes share an identical microsatellite haplotype across the region (Fig. 4 in the Supplementary Appendix); the same haplotype was found in only 1 of 69 127G chromosomes.”
Quote in the paperSubstantial claimMay combine two claims.
Findingnone givenHeterozygosity at PRNP codons 127 or 129, or both, is highest in the zone of high kuru exposure, resulting in Hardy-Weinberg disequilibrium.
“Heterozygosity at 127 or 129, or both, is highest in the zone of high exposure, resulting in Hardy-Weinberg disequilibrium.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataWhen data are stratified according to age, sex, and exposure, the most striking deficit of codon 129 homozygosity is found in elderly women from midlevel-exposure and high-exposure zones, in whom there is a marked loss of Hardy-Weinberg equilibrium at codon 129, in contrast to persons in low-exposure or unexposed zones (P = 3.1×10 -5).
“When these data are stratified according to age, sex, and exposure, the most striking deficit of codon 129 homozygosity is found in elderly women from midlevel-exposure and high-exposure zones, in whom there is a marked loss of Hardy-Weinberg equilibrium at codon 129 -in contrast to persons in low-exposure or unexposed zones (P = 3.1×10 -5 by an exact method with the use of PLINK) (Table 1 and Fig”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataAlthough no 127VV homozygotes were observed in the elderly population, consistent with Hardy-Weinberg equilibrium, 127V alleles were not in equilibrium with codon 129 genotypes.
“Although our failure to observe any 127VV homozygotes in the elderly population is consistent with Hardy-Weinberg equilibrium, 127V alleles were not in equilibrium with codon 129 genotypes.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataOnly 1 of 36 parents from 127V genealogies was recorded as having died from kuru, whereas 33 of 218 parents were recorded as having died from kuru in matched 127G pedigrees (P = 0.04 by a two-tailed chi-square test).
“Despite this, only 1 of 36 parents from 127V genealogies was recorded as having died from kuru, whereas 33 of 218 parents were recorded as having died from kuru in the matched 127G pedigrees (P = 0.04 by a two-tailed chi-square test).”
Quote in the paperSubstantial claim- Rests on an assumption: Parents of the living 127V probands would have lived through the peak kuru epidemic.
- Rests on an assumption: One parent of a 127V proband would be expected to be a 127V carrier.
May combine two claims.
Findingown dataIn the entire sample of 480 persons born before 1960 in midlevel-exposure and high-exposure villages, relative fitness was 0.64 for 127GG-129MM and 0.74 for 127GG-129VV relative to the three heterozygous genotypic combinations; for codon 129 alone, relative fitness was 0.69 for 129MM and 0.74 for 129VV relative to the 129MV genotype.
“In the entire sample of 480 persons born before 1960 in midlevel-exposure and high-exposure villages, ω = 0.64 for 127GG-129MM and ω = 0.74 for 127GG-129VV relative to the three heterozygous genotypic combinations; for codon 129 alone, ω = 0.69 for 129MM and ω = 0.74 for 129VV relative to the 129MV genotype.”
Quote in the paperSubstantial claim- The authors state this as an assumption: The three heterozygous genotypic combinations (127GV-129MM, 127GV-129MV, and 127GG-129MV) are equally the most viable genotypes.
- The authors state this as an assumption: For codon 129 alone, the 129MV genotype is the most viable.
Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).
Findingnone givenAt equilibrium frequency, 48% of elderly women would be expected to be homozygous for PRNP.
“At equilibrium frequency, 48% of elderly women would be expected to be homozygous for PRNP.”
Quote in the paperNot a substantial claimMay combine two claims.
Interpretationown dataThe 127V polymorphism is an acquired prion disease resistance factor selected during the kuru epidemic, rather than a pathogenic mutation that could have triggered the kuru epidemic.
“The 127V polymorphism is an acquired prion disease resistance factor selected during the kuru epidemic, rather than a pathogenic mutation that could have triggered the kuru epidemic.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationKuru is a prion disease that affected the Fore linguistic group of the Eastern Highlands Province of Papua New Guinea and provides major experience with epidemic prion disease in humans.
“Kuru is a prion disease that had a dramatic impact on the Fore linguistic group of the Eastern Highlands Province of Papua New Guinea 1 and that provides our major experience with epidemic prion disease in humans.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [1] source
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisereasoningAt its peak, kuru predominantly affected adult women and children of both sexes.
“at its peak, it predominantly affected adult women and children of both sexes.”
- Also stated in: § Abstract · plain
“with the result that kuru at its peak predominantly affected women and children.”
Quote in the paperNot a substantial claim- Rests on an assumption: Male members of the Fore group older than 6 to 8 years of age participated little, if at all, in mortuary feasts.
- Also stated in: § Abstract · plain
Probably not a substantial claim: may not pass S3 (load-bearing).
Study design and conductnone givenInvestigators who obtained genealogic information were unaware of the participants' genetic data.
“The investigators who obtained genealogic information were unaware of the participants' genetic data.”
Quote in the paperNot a substantial claimMay combine two claims.
InterpretationreasoningVariants at codons 127 and 129 of PRNP demonstrate the population genetic response to an epidemic of prion disease and represent a powerful episode of recent selection in humans.
“Variants at codons 127 and 129 of PRNP demonstrate the population genetic response to an epidemic of prion disease and represent a powerful episode of recent selection in humans.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationKuru incidence has steadily declined and disappeared from the younger Fore population since the cessation of endocannibalism in the late 1950s.
“Its incidence has steadily declined since the cessation of its route of transmission, endocannibalism.”
- Also stated in: § Abstract · plain
“Kuru has progressively disappeared from the younger Fore population, consistent with the cessation of endocannibalism in the late 1950s.5”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [5] Alpers MP, 2005, Commun Dis Intell
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Also stated in: § Abstract · plain
Classified as probably not a substantial claim.
Study design and conductcitationPopulation structure was assessed with the use of EIGENSTRAT software or the genomic control method.
“Population structure was assessed with the use of EIGENSTRAT soft-ware 23 or the genomic control method.24”
Quote in the paperSubstantial claim0 of 2 sources checkedProbably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationKuru is associated with prolonged incubation periods that may exceed five decades.
“Kuru is associated with prolonged incubation periods that may exceed five decades.3”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [3] source
May combine two claims.
Interpretationown dataA novel PRNP allele, codon 127V, discovered at the epicenter of kuru exposure, is associated with resistance to kuru in patients and pedigrees and is found at the highest frequency in otherwise susceptible 129MM elderly women.
“In addition, we have discovered at the epicenter of kuru exposure a novel PRNP allele -codon 127Vthat is associated with resistance to kuru in patients and pedigrees and is found at the highest frequency in otherwise susceptible 129MM elderly women.”
Quote in the paperSubstantial claimMay combine two claims.
Interpretationown dataThe new data provide evidence of a complex selection event in the Fore population at PRNP during the kuru epidemic, with balancing selection acting to maximize heterozygosity at codon 129, coincident with positive selection acting to increase 127V alleles on a 129M background.
“Our new data thus provide evidence of a complex selection event in the Fore population at PRNP during the kuru epidemic, with balancing selection acting to maximize heterozygosity at codon 129, coincident with positive selection acting to increase 127V alleles on a 129M background.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationreasoningThis is consistent with the increase in the incidence of kuru through the early 20th century that was reported by elderly members of the Fore society.
“This is consistent with the increase in the incidence of kuru through the early 20th century that was reported by elderly members of the Fore society.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationIn an earlier work, the authors proposed the theory that kuru imposed balancing selection on the Fore, acting at codon 129 of PRNP, although at the time they had sampled only 30 elderly exposed women.
“In an earlier work, we proposed the theory that kuru imposed balancing selection on the Fore, acting at codon 129 of PRNP, although at the time we had sampled only 30 elderly exposed women.12”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [12] source
Probably not a substantial claim: may not pass S3 (load-bearing).
InterpretationreasoningBecause mean life expectancy in the kuru region was thought to be between 40 and 45 years, the possibility cannot be excluded that 127V is associated with a late-onset, low-penetrance, or recessive inherited prion disease that might have triggered the kuru epidemic.
“Since the mean life expectancy in the kuru region was thought to be between 40 and 45 years, we cannot exclude the possibility that 127V is associated with a late-onset, low-penetrance, or recessive inherited prion disease that might indeed have triggered the kuru epidemic.”
Quote in the paperNot a substantial claim- Rests on an assumption: Mean life expectancy in the kuru region was between 40 and 45 years.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationThe inherited prion diseases caused by point mutations are generally poorly transmissible, and in some cases not transmissible, to experimental animals and are associated with a molecular type of the disease-associated prion protein (PrP Sc) that is distinct from that of sporadic Creutzfeldt-Jakob disease or kuru.
“The inherited prion diseases caused by point mutations are generally poorly transmissible, and in some cases not transmissible, to experimental animals and are associated with a molecular type of the disease-associated prion protein (PrP Sc ) that is distinct from that of sporadic Creutzfeldt-Jakob disease or kuru.16”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [16] source
The paper relies on this without support.
Kuru was transmitted from human to human through the Fore practice of consuming deceased relatives at mortuary feasts (endocannibalism).
“It was the practice in the Fore society for kinship groups to consume deceased relatives at mortuary feasts, a practice that resulted in human-to-human prion transmission”
The paper relies on this without support.
Male members of the Fore group older than 6 to 8 years of age participated little, if at all, in mortuary feasts.
“male members of the Fore group who were older than 6 to 8 years of age participated little, if at all, in these feasts”
The paper relies on this without support.
Kuru was restricted to the Fore linguistic groups and their immediate neighbors with whom they intermarried.
“Kuru was restricted to the Fore linguistic groups and their immediate neighbors with whom they intermarried.”
The paper relies on this without support.
The exposure index based on participation in mortuary feasts is a valid measure of exposure to kuru.
“We stratified these samples according to the critical determinants of exposure to kuru on the basis of participation in mortuary feasts: sex, date of birth, and village of residence.”
The paper relies on this without support.
G127V is located in a highly conserved and structured region of PrP.
“which is located in a highly conserved and structured region of PrP.”
The paper relies on this without support.
In traditional Fore society, boys older than approximately 7 years of age would no longer participate in the consumption of highly infectious material from mortuary feasts.
“In traditional Fore society, boys older than approximately 7 years of age would no longer participate in the consumption of highly infectious material from mortuary feasts.”
The paper relies on this without support.
Elderly women from the kuru region who survived to old age were resistant to kuru.
“since there is an excess of 129MV in elderly women who were resistant to kuru”
The paper relies on this without support.
Kuru was transmitted through the consumption of highly infectious material from mortuary feasts.
“In traditional Fore society, boys older than approximately 7 years of age would no longer participate in the consumption of highly infectious material from mortuary feasts.”
The paper relies on this without support.
Parents of the living 127V probands would have lived through the peak kuru epidemic.
“Parents of the living 127V probands would have lived through the peak kuru epidemic.”
The paper relies on this without support.
One parent of a 127V proband would be expected to be a 127V carrier.
“Since one parent would be expected to be a 127V carrier”
The paper relies on this without support.
Mean life expectancy in the kuru region was between 40 and 45 years.
“Since the mean life expectancy in the kuru region was thought to be between 40 and 45 years”
The paper relies on this without support.
Oral history that the first kuru patient was observed in the Keiagana linguistic group, northwest of the Fore region, is accurate.
“oral history that recorded that the first kuru patient was observed in the Keiagana linguistic group, which is located to the northwest of the Fore region.”
The authors state this as an assumption.
The three heterozygous genotypic combinations (127GV-129MM, 127GV-129MV, and 127GG-129MV) are equally the most viable genotypes.
“with all heterozygous combinations (127GV-129MM, 127GV-129MV, and 127GG-129MV) considered as equally the most viable genotypes”
The authors state this as an assumption.
For codon 129 alone, the 129MV genotype is the most viable.
“or for codon 129 alone, with the 129MV genotype considered as the most viable.”
The paper relies on this without support.
Estimates of the onset of the kuru epidemic based on recollections of elderly Fore group members are accurate.
“estimates of the onset of the kuru epidemic that are based on recollections of the elderly members of the Fore group”
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
The loss of Met/Met genotype and accumulation of alternative alleles in the postepidemic Fore population was indicated by the finding that the PRNP V127V synonymous substitution that showed the highest frequency in the surviving elderly women is part of the 127GG-129VV haplotype.
“The loss of Met/Met genotype and accumulation of alternative alleles in the postepidemic Fore population was also indicated by the finding that the PRNP V127V synonymous substitution that showed the highest frequency in the surviving elderly women is part of the 127GG–129VV haplotype (38).”
From Kuru (2012) · cites this paper as [38]
Split into 2 atoms — 0 confirmed, 1 partially supported, 1 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
Checked by a reasoning model — may be wrong.
Experimental — accuracy not yet measuredDeficit of codon 129 homozygosity was found in elderly females who lived through the epidemic in high-exposure areas and attended multiple mortuary feasts.
“Deficit of codon 129 homozygosity was also found in analysis of elderly females who lived through the epidemic in the high-exposure areas and attended multiple mortuary feasts (38).”
From Kuru (2012) · cites this paper as [38]
The Hardy-Weinberg Equilibrium section reports a marked deficit of codon 129 homozygosity in elderly women from midlevel- and high-exposure zones. The Study Sample and Exposure Index section says an earlier, smaller cohort of older women had attended multiple mortuary feasts, but it does not establish that the women in the expanded high-exposure analysis had each attended multiple feasts. Page numbers are not available in our copy. (LLM, conf=0.83)
Experimental — accuracy not yet measured
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“1191Commentary”
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“In fact, it demonstrates that the polymorphisms at codon 127 and 129 of PRNP are a population genetic response to an epidemic of prion disease and can be regarded as a powerful episode of recent selection in humans [120].”
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“Homozygosity at this codon can decrease the age of onset in genetic prion disease cases, and whether methionine or valine is present in the mutant PrP protein can influence clinical presentation (Mead et al. 2009a).”
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“(2019) also succeeded in introducing a mutation that imparts resistance to prion disease in humans (Mead et al., 2009) and mice (Asante et al.”
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“Another protective polymorphism G127V located in a highly conserved region of PrP was discovered by the Collinge’s group [156,157].”
BackgroundRare TREM2 variants associated with Alzheimer’s disease display reduced cell surface expression
Sirkis, D. W., Bonham, L. W., Aparicio, R. E., Geier, E. G., Ramos, E. M., Wang, Q., Karydas, A., Miller, Z. A., Miller, B. L., Coppola, G., et al. (2016) · Acta Neuropathologica Communications · doi:10.1186/s40478-016-0367-7 · Cited by 61 · see citing works
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“In this case, there is actually evidence for allelefrequency shifts in the New Guinea highlands during the twentieth century in response to the relatively recent adoption of ritualistic cannibalism, a practice that triggered an epidemic of the fatal prion disease kuru (74).”
BackgroundGenetic aspects of human prion diseases
Appleby, B. S., Shetty, S., & Elkasaby, M. (2022) · Frontiers in Neurology · doi:10.3389/fneur.2022.1003056 · Cited by 56 · see citing works
“A kuru resistant polymorphism (G127V), only found in populations affected by kuru, has also been described in subjects who did not develop kuru, predominantly codon 129 methionine homozygotes (38, 39).”
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“Thus, kuru imposed a strong balancing selection on the Fore that essentially eliminated codon 129 homozygotes from the population [70].”
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“The loss of Met/Met genotype and accumulation of alternative alleles in the postepidemic Fore population was also indicated by the finding that the PRNP V127V synonymous substitution that showed the highest frequency in the surviving elderly women is part of the 127GGY129VV haplotype (38).”
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“…associated with the risks of acquired prion diseases such as kuru, variant CJD, or iatrogenic CJD (Collinge et al. 1991, 1996), whereas polymorphic codon 127 and codon 219 are reportedly resistant to kuru (Mead et al. 2009; Asante et al. 2015) and sporadic CJD (Shibuya et al. 1998), respectively.”
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“Indeed, the Kuru epidemic selected a new resistant allele at residue 127 (Mead et al. 2009b).”
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Self-citationHumans as cucinivores: comparisons with other species
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“Genetic studies of the Fore people show that the frequency of prion disease resistance genes is highly selected and that a novel prion protein gene variant that confers disease resistance is found exclusively in groups exposed to kuru (Mead et al. 2009).”
BackgroundProbing Early Misfolding Events in Prion Protein Mutants by NMR Spectroscopy
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“Polymorphism at codon 127 (G127V) has been reported only among the natives of Papua New Guinea and is protective against Kuru [118].”
BackgroundZheng, Z., Zhang, M., Wang, Y., et al. (2018) · Scientific Reports · doi:10.1038/s41598-018-31394-6 · Cited by 38 · see citing works
Structural biology of ex vivo mammalian prions
Artikis, E., Kraus, A., & Caughey, B. W. (2022) · Journal of Biological Chemistry · doi:10.1016/j.jbc.2022.102181 · Cited by 35 · see citing works
Drugs That Bind to α-Synuclein: Neuroprotective or Neurotoxic?
Kakish, J., Lee, D., & Lee, J. S. (2015) · ACS Chemical Neuroscience · doi:10.1021/acschemneuro.5b00172 · Cited by 35 · see citing works
Prion Disease: A Tale of Folds and Strains
Kretzschmar, H. A., & Tatzelt, J. (2013) · Brain Pathology · doi:10.1111/bpa.12045 · Cited by 35 · see citing works
“Two other polymorphic codons of PRNP (127 and 219) may confer resistance to kuru and sCJD (106, 158, 159).”
BackgroundInfectious prion diseases in humans: Cannibalism, iatrogenicity and zoonoses
Haı̈k, S., & Brandel, J. (2014) · Infection Genetics and Evolution · doi:10.1016/j.meegid.2014.06.010 · Cited by 34 · see citing works
“An additional PRNP protective factor (G127V) has been identified within a subgroup of MM subjects who were exposed to kuru and that was never detected in a series of 152 patients with kuru (Mead et al., 2009).”
BackgroundHuman prion diseases and the prion protein – what is the current state of knowledge?
Nafe, R., Arendt, C. T., & Hattingen, E. (2023) · Translational Neuroscience · doi:10.1515/tnsci-2022-0315 · Cited by 35 · see citing works
“Furthermore, G127V is an unequi-vocally protective polymorphism against an infection with pathological PrP, being addressed in more detail in the following chapter [154,155].”
BackgroundTakada, L. T., Kim, M., Metcalf, S., Illán‐Gala, I., & Geschwind, M. D. (2018) · Handbook of clinical neurology · doi:10.1016/b978-0-444-64076-5.00029-6 · Cited by 33 · see citing works
Kuru: A Journey Back in Time from Papua New Guinea to the Neanderthals’ Extinction
Liberski, P. P. (2013) · Pathogens · doi:10.3390/pathogens2030472 · Cited by 31 · see citing works
“Another protective polymorphism G127V located in a highly conserved region of PrP was discovered by the Collinge’s group [157,158].”
BackgroundSporadic Distribution of Prion-Forming Ability of Sup35p from Yeasts and Fungi
Edskes, H. K., Khamar, H. J., Winchester, C.-L., et al. (2014) · Genetics · doi:10.1534/genetics.114.166538 · Cited by 30 · see citing works
“Moreover, the common occurrence of lethal and near-lethal variants of [PSI+] (McGlinchey et al. 2011) and the rare occurrence of [PSI+] in the wild (Chernoff et al. 2000; Resende et al. 2003; Nakayashiki et al. 2005; Halfmann et al. 2012) implies that [PSI+] is generally detrimental to its host…”
BackgroundMoreno, J. A., & Telling, G. C. (2017) · Methods in molecular biology · doi:10.1007/978-1-4939-7244-9_16 · Cited by 30 · see citing works
“Remarkably, a novel PRNP variant was found uniquely among unaffected individuals in the kuru-exposed population, in which V at residue 127 was replaced by glycine (G) [86].”
BackgroundNihat, A., Mok, T., & Collinge, J. (2020) · doi:10.1093/med/9780198713005.003.0042 · Cited by 29 · see citing works
Self-citationMolecular foundations of prion strain diversity
Carta, M. C., & Aguzzi, A. (2021) · Current Opinion in Neurobiology · doi:10.1016/j.conb.2021.07.010 · Cited by 31 · see citing works
Authority, E. F. S. (2010) · EFSA Journal · doi:10.2903/j.efsa.2010.1888 · Cited by 28 · see citing works
Transmissibility versus Pathogenicity of Self-Propagating Protein Aggregates
Caughey, B. W., & Kraus, A. (2019) · Viruses · doi:10.3390/v11111044 · Cited by 27 · see citing works
“PRNP genotype also affects human susceptibility to kuru [59], and both iatrogenic and sporadic forms of Creutzfeldt-Jakob disease [60,61].”
BackgroundZhou, S., Shi, D., Liu, X., Liu, H., & Yao, X. (2016) · Scientific Reports · doi:10.1038/srep21804 · Cited by 26 · see citing works
Huang, J., Li, X., Liu, W., et al. (2019) · Journal of Molecular Biology · doi:10.1016/j.jmb.2019.11.020 · Cited by 26 · see citing works
Thody, S. A., & Udgaonkar, J. B. (2017) · Biochemistry · doi:10.1021/acs.biochem.7b00894 · Cited by 25 · see citing works
“For the initial 2-5% data, equation (10) can be solved by the linear perturbation approach to”
BackgroundBiological properties of the PrP-like Shadoo protein
Daude, N. (2010) · Frontiers in bioscience · doi:10.2741/3801 · Cited by 25 · see citing works
Wemheuer, W. M., Wrede, A., & Schulz‐Schaeffer, W. (2017) · Frontiers in Aging Neuroscience · doi:10.3389/fnagi.2017.00187 · Cited by 23 · see citing works
“Mead et al. (2009) reported a novel PRNP polymorphism that ‘‘was found exclusively in people who lived in the region in which kuru was prevalent and that was present in half of the otherwise susceptible women from the region of highest exposure who were homozygous for methionine at PRNP codon 129’’.”
BackgroundTaguchi, Y., Mistica, A., Kitamoto, T., et al. (2013) · PLoS Pathogens · doi:10.1371/journal.ppat.1003466 · Cited by 23 · see citing works
Genetic risk factors for Creutzfeldt-Jakob disease
Jones, E. L., & Mead, S. (2020) · Neurobiology of Disease · doi:10.1016/j.nbd.2020.104973 · Cited by 43 · see citing works
Self-citationColeman, B. M., Harrison, C. F., Guo, B. B., Masters, C. L., Barnham, K. J., Lawson, V., & Hill, A. F. (2013) · Journal of Virology · doi:10.1128/jvi.02720-13 · Cited by 22 · see citing works
“Furthermore, a polymorphism in human PrP (G127V) has been identified in individuals in the highlands of Papua New Guinea in regions most affected by the kuru epidemic, suggesting that this alteration to human PrP may have protective properties (17).”
BackgroundWickner, R. B., Son, M., & Edskes, H. K. (2019) · Viruses · doi:10.3390/v11030238 · Cited by 22 · see citing works
“The decimation of the Fore population by Kuru, the spongiform encephalopathy transmitted by funeral feasts, has resulted in the selection of a mutation of PrP residue 127 conferring resistance to the disease [79].”
BackgroundStriebel, J. F., Race, B., Meade-White, K. D., et al. (2011) · PLoS Pathogens · doi:10.1371/journal.ppat.1002275 · Cited by 21 · see citing works
“The human PrP polymorphism, G127V, was recently shown to be associated with resistance to kuru [24].”
BackgroundTuite, M. F., Staniforth, G. L., & Cox, B. S. (2015) · Prion · doi:10.1080/19336896.2015.1111508 · Cited by 21 · see citing works
“Although either allele can support the PrP prion when in a homozygous state, when in a heterozygous state individuals are resistant to infection by many (but not all) PrP variants.(64,65) Many similar interactions are seen in the PrP gene of sheep, affecting scrapie.”
BackgroundTransgenic Mouse Models of Prion Diseases
Telling, G. C. (2008) · Methods in molecular biology · doi:10.1007/978-1-59745-234-2_17 · Cited by 20 · see citing works
Using NMR spectroscopy to investigate the role played by copper in prion diseases
Alsiary, R., Alghrably, M., Saoudi, A., Alghamdi, S. M., Jaremko, Ł., Jaremko, M., & Emwas, A.-H. M. (2020) · Neurological Sciences · doi:10.1007/s10072-020-04321-9 · Cited by 20 · see citing works
“killed by the disease during the practice of funerary cannibalism [176].”
BackgroundThe Genetics of Susceptibility to Variant Creutzfeldt-Jakob Disease
Saba, R., & Booth, S. A. (2013) · Public Health Genomics · doi:10.1159/000345203 · Cited by 19 · see citing works
Arshad, H., Patel, Z., Amano, G., et al. (2022) · Journal of Neurochemistry · doi:10.1111/jnc.15739 · Cited by 17 · see citing works
Martynov, A. V. (2012) · Paleontological Journal · doi:10.1134/s0031030112080072 · Cited by 17 · see citing works
“…widely used evidence of the existence of evolution is the appearance of new forms of certain viruses and expansion in human populations of previously rarely found alleles protecting against 840 PALEONTOLOGICAL JOURNAL Vol. 46 No. 8 2012 MARTYNOV particular diseases (e.g., Mead et al., 2009; etc.).”
BackgroundPrions are affected by evolution at two levels
Wickner, R. B., & Kelly, A. C. (2015) · Cellular and Molecular Life Sciences · doi:10.1007/s00018-015-2109-6 · Cited by 17 · see citing works
“are apparent in kuru-exposed populations (linkage disequilibrium, distortion of Hardy–Weinburg equilibrium, higher relative fitness for resistant alleles), and higher prevalence of PrP 127 V and 129 M/V near the epicenter of kuru exposure further suggests that these alleles were selected in response to prion disease e…”
Serpa, J. J., Popov, K. I., Petrotchenko, E. V., et al. (2021) · PROTEOMICS · doi:10.1002/pmic.202000298 · Cited by 17 · see citing works
“Polymorphism at codon 127 (G127V) has been shown to be protective against kuru disease and, interestingly, has only been identified among natives of Papua, New Guinea [137].”
BackgroundZhang, J., Zhang, Z.-X., Peng-chen, D., Zhou, W. M., Wu, S., Wang, Q., Chen, C., Shi, Q., Chen, C., Gao, C., et al. (2014) · European Journal of Human Genetics · doi:10.1038/ejhg.2014.52 · Cited by 17 · see citing works
Neuroimagen estructural y funcional en las enfermedades priónicas humanas
Ortega‐Cubero, S., Luquín, M. R., Domínguez, I., et al. (2011) · Neurología · doi:10.1016/j.nrl.2011.03.012 · Cited by 17 · see citing works
Structural effects of the highly protective V127 polymorphism on human prion protein
Hosszu, L. L. P., Conners, R., Sangar, D., Batchelor, M., Sawyer, E. B., Fisher, S. J., Cliff, M. J., Hounslow, A. M., McAuley, K. E., Brady, R. L., et al. (2020) · Communications Biology · doi:10.1038/s42003-020-01126-6 · Cited by 14 · see citing works
Self-citationChronic Wasting Disease (CWD) in Cervids and the Consequences of a Mutable Protein Conformation
Silva, C. J. (2022) · ACS Omega · doi:10.1021/acsomega.2c00155 · Cited by 16 · see citing works
Langeveld, J., Pirisinu, L., Jacobs, J. G., et al. (2019) · Veterinary Research · doi:10.1186/s13567-019-0718-z · Cited by 16 · see citing works
On the bumpy road towards ‘personalized medicine’
Francke, U. (2009) · EMBO Molecular Medicine · doi:10.1002/emmm.200900056 · Cited by 16 · see citing works
“3 as associated with increased risk for coronary heart disease, and possibly abdominal aortic aneurysm, stroke and periodontitis (Schaefer et al, 2009), yet no pathogenic mutations were found in the two protein-coding genes in the region, CDLN2B and CDKN2A.”
BackgroundThe Evolution of Experimental Rodent Models for Prion Diseases
DeFranco, J. P., & Telling, G. C. (2025) · Journal of Neurochemistry · doi:10.1111/jnc.70039 · Cited by 15 · see citing works
“…(M129) demonstrated that mice homozygous and heterozygous for valine at amino acid position 127 (G127V) were completely resistant to kuru and sCJD infections (Asante et al. 2015), which is a natural protective polymorphism carried by some humans within kuru endemic regions (Mead et al. 2009).”
Nyström, S., & Hammarström, P. (2014) · Prion · doi:10.4161/pri.27601 · Cited by 14 · see citing works
“The Collinge group suggested that the most likely reason for M129V to proliferate in ancient Europe was due to endocannibalism,14 for which there is ample evidence in modern studies of Kuru.”
BackgroundInfluentialPrions and Prion Diseases of the Central Nervous System (Transmissible Neurodegenerative Diseases)
Bosque, P. J., & Tyler, K. L. (2015) · Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases · doi:10.1016/b978-1-4557-4801-3.00181-8 · Cited by 13 · see citing works
Human prion diseases and the risk of their transmission during anatomical dissection
Bradford, B. M., Piccardo, P., Ironside, J. W., & Mabbott, N. A. (2014) · Clinical Anatomy · doi:10.1002/ca.22403 · Cited by 13 · see citing works
“Following the epidemic there is some indication that genetic selection for natural resistance to kuru infection has occurred within the affected population (Mead et al., 2009; Atkins et al., 2013).”
BackgroundWilliams, S. C. P. (2016) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1601663113 · Cited by 11 · see citing works
The roles of the conserved tyrosine in the β2-α2 loop of the prion protein
Danzhi Huang, A., & Caflisch, A. (2015) · Prion · doi:10.1080/19336896.2015.1115944 · Cited by 11 · see citing works
“The PrP variant G127V, identified among unaffected members of the Fore population, was interpreted as a resistance factor due to positive evolutionary selection.(15) A recent in vivo study has demonstrated that the V127 variant prevents prion conversion and shows a dose-dependent inhibition of wild type PrP propagatio…”
BackgroundIdentification of two novel mutations, PSEN1 E280K and PRNP G127S, in a Malaysian family
Bagyinszky, E., Ch’ng, G.-S., Bae, S., An, S. S. A., & Kim, S. (2015) · Neuropsychiatric Disease and Treatment · doi:10.2147/ndt.s86334 · Cited by 10 · see citing works
“29 In addition, for codon 127, a silent mutation was described (GGC .”
BackgroundStructural and functional neuroimaging in human prion diseases
Ortega‐Cubero, S., Luquín, M. R., Domínguez, I., et al. (2013) · Neurología (English Edition) · doi:10.1016/j.nrleng.2011.03.012 · Cited by 10 · see citing works
“Another more recent study indicates that the 127V polymorphism is also a factor protecting individuals from developing kuru.(16) No neuroimaging studies of this disease are available.”
BackgroundGenetic causes and modifiers of prion diseases
Mead, S., Hermann, P., Mok, T. H., Parchi, P., & Zerr, I. (2026) · The Lancet Neurology · doi:10.1016/s1474-4422(25)00451-x · Cited by 12 · see citing works
Self-citationPrion Type-Dependent Deposition of PRNP Allelic Products in Heterozygous Sheep
Langeveld, J., Jacobs, J. G., Hunter, N., et al. (2015) · Journal of Virology · doi:10.1128/jvi.02316-15 · Cited by 9 · see citing works
“68 From many studies it is obvious that TSEs occur in distinct phenotypic forms that are 69 recognized as TSE- or prion disease-types such as classical scrapie in sheep and 70 goat, Creutzfeldt-Jakob disease in humans, chronic wasting disease in cervids and 71 bovine spongiform encephalopathy (BSE) encephalopathy catt…”
BackgroundEffect of Domestication on the Spread of the [PIN+] Prion inSaccharomyces cerevisiae
Kelly, A. C., Busby, B., & Wickner, R. B. (2014) · Genetics · doi:10.1534/genetics.114.165670 · Cited by 9 · see citing works
“…for the residue 129 M/V polymorphism in PrP in mammals is associated with resistance to prion disease (O’Rourke et al. 1997; Kelly et al. 2008; Mead et al. 2009), and previous reports in yeast have shown that certain polymorphisms in SUP35 and RNQ1 provide varying levels of protection…”
BackgroundEspinosa, J. C., Marín‐Moreno, A., Aguilar‐Calvo, P., et al. (2020) · Neuropathology and Applied Neurobiology · doi:10.1111/nan.12676 · Cited by 9 · see citing works
The G127V variant of the prion protein interferes with dimer formation in vitro but not in cellulo
Sangeetham, S. B., Engelke, A. D., Fodor, E., et al. (2021) · Scientific Reports · doi:10.1038/s41598-021-82647-w · Cited by 8 · see citing works
Estimation of the number of inherited prion disease mutation carriers in the UK
Corbie, R., Campbell, T., Darwent, L., Rudge, P., Collinge, J., & Mead, S. (2022) · European Journal of Human Genetics · doi:10.1038/s41431-022-01132-8 · Cited by 7 · see citing works
Self-citationInterspecies transmission of prions
Afanasieva, E. G., Kushnirov, V. V., & Ter‐Avanesyan, M. D. (2011) · Biochemistry (Moscow) · doi:10.1134/s0006297911130013 · Cited by 8 · see citing works
A Transient Intermediate Populated in Prion Folding Leads to Domain Swapping
Mondal, B., & Reddy, G. (2019) · Biochemistry · doi:10.1021/acs.biochem.9b00621 · Cited by 8 · see citing works
Tang, Y., Yao, Y., & Wei, G. (2020) · Chinese Physics B · doi:10.1088/1674-1056/aba9ba · Cited by 8 · see citing works
“[52] Asante et al.”
Stability of BSE infectivity towards heat treatment even after proteolytic removal of prion protein
Langeveld, J., Balkema‐Buschmann, A., Becher, D., et al. (2021) · Veterinary Research · doi:10.1186/s13567-021-00928-8 · Cited by 7 · see citing works
“As example of the validity of the prion hypothesis is the application of the one gene—one protein concept in the successful Mendelian way of breeding for resistance towards the disappearance of scrapie in sheep and observation of increased levels of a resistance related polymorphism in humans in the epidemic kuru regi…”
BackgroundSaez-Calveras, N., Vaquer‐Alicea, J., White, C. L., Tak, Y., Cosentino, S., Faust, P. L., Louis, E. D., & Diamond, M. I. (2025) · Acta Neuropathologica · doi:10.1007/s00401-024-02843-6 · Cited by 8 · see citing works
“Indeed, polymorphism within the prion protein gene (PRNP) has protected individuals from contracting Kuru in New Guinea, where this transmissible prion disorder was endemic [19, 20].”
Structural Modeling of Human Prion Protein's Point Mutations
Rossetti, G., & Carloni, P. (2017) · Progress in molecular biology and translational science · doi:10.1016/bs.pmbts.2017.07.001 · Cited by 7 · see citing works
- Authors
- Mead, S., Whitfield, J., Poulter, M., Shah, P., Uphill, J., Campbell, T., Al-Dujaily, H., Hummerich, H., Beck, J., Mein, C. A., Verzilli, C., Whittaker, J., Alpers, M. P., & Collinge, J.
- Affiliations
- MRC Prion Unit (GB)
- Queen Mary University of London (GB)
- London School of Hygiene & Tropical Medicine (GB)
- Curtin University (AU)
- ORCID
- Venue
- New England Journal of Medicine
- Publisher
- Massachusetts Medical Society
- Published
- 2009-11-19
- Volume
- 361
- Issue
- 21
- Pages
- 2056-2065
- ISSN
- 0028-4793 (ISSN-L)
- 1533-4406
- OpenAlex
- W2120350230
- Semantic Scholar
- 0c95f5a90e768e6890d50e392c5028ebafc903b7
- Cited by
- 206
- References
- 29
- Citations by year
- 2026: 8 · 2025: 9 · 2024: 8 · 2023: 6 · 2022: 9 · 2021: 15 · 2020: 20 · 2019: 13 · 2018: 11 · 2017: 12 · 2016: 12 · 2015: 19 · 2014: 9 · 2013: 13 · 2012: 9
- FWCI
- 4.80
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- New England Journal of Medicine (publishedVersion)
- PubMed (publishedVersion)
- LSHTM Research Online (London School of Hygiene and Tropical Medicine) (acceptedVersion)
- UCL Discovery (University College London) (submittedVersion)
- eSpace (Curtin University) (submittedVersion)
- Funders
- Wellcome Trust
- National Institute for Health and Care Research
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Amyloidosis: Diagnosis, Treatment, Outcomes
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Keywords
- kuru, prion disease, PRNP gene, prion protein polymorphism, prion disease resistance, natural selection, Papua New Guinea Highlands
- MeSH terms
- Prion Proteins, Adolescent, Adult, Aged, Cannibalism, Disease Outbreaks, Female, Gene Frequency, Genotype, Haplotypes, Humans, Kuru, Male, Middle Aged, Papua New Guinea, Polymorphism, Genetic, Prions, Genetic Predisposition to Disease, Young Adult, Genetic Fitness
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