Cited by 36Renal Diseases and GlomerulopathiesLipid metabolism and disordersLipoproteins and Cardiovascular Health

Identification of Apolipoprotein E Guangzhou (Arginine 150 Proline), a New Variant Associated with Lipoprotein Glomerulopathy

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Luo, Boxun, Huang, Fengxian, Liu, Qicai, Li, Xiaoyan, Chen, Wenfang, Zhou, Shu-Feng, Yu, Xueqing·2008·American Journal of Nephrology

Abstract

Background/Aims: Lipoprotein glomerulopathy (LPG) is a rare disease characterized by thrombus-like substances in markedly dilated glomerular capillaries and elevated plasma levels of apolipoprotein E (apoE). Previous studies have shown that genetic disorders of apoE may contribute to the pathogenesis of LPG, but LPG may not be caused by apoE gene mutations in Chinese patients. This study investigated the association of a new variant of apoE with LPG in a Chinese family. Methods: The apoE gene in a family with 4 LPG patients was sequenced. The polymerase chain reaction product of coding region of apoE exon 4 was cloned into pMD 18-T vector and then sequenced. Results: A novel point mutation in exon 4 of the apoE gene was identified in all 4 LPG patients and 1 asymptomatic family member. Sequence analysis confirmed a nucleotide G to C point mutation in exon 4 (base 308) of the apoE gene in all patients and the asymptomatic family member. This missense mutation denotes amino acid substitution of the proline residue for arginine residue at position 150 of apoE. Those patients were all heterozygotes with apoE Guangzhou. One of 2 grandsons was a heterozygous carrier of apoE Guangzhou, although he did not have proteinuria. Conclusion: The results of this study suggest that apoE (arginine 150 proline) is a novel apoE variant that etiologically related to LPG. This variant (apoE Guangzhou) may cause a marked molecular conformational change of the apoE and thus impair its binding ability to lipids.

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Crossref · 10.1159/000111828

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  • The APOE allele of APOE-Guangzhou (R150P) was not reported.

    “We found that both APOE‐Okayama (R150G; Kinomura et al., 2008) and APOE‐Modena (R150C; Magistroni et al., 2013; Russi et al., 2009) were located on the ε2 allele, while APOE allele of APOE‐Guangzhou (R150P) was not reported (Luo et al., 2008).”
  • The substitution of proline has been reported in 5/12 variants in the LDL receptor-binding hotspot region, including apoE Sendai, apoE Chicago, apoE Guangzhou, apoE Osaka/Kurashiki, and apoE Chengdu.

    “Interestingly, the substitution of proline has been reported in 5/12 variants in this hotspot region, including apoE Sendai (p.R163P)4), apoE Chicago (p.R165P)11), apoE Guangzhou (p.R168P)12), apoE Osaka/Kurashiki (p.R176P)13, 14), and apoE Chengdu (p.L173P).”
  • Nearly half of reported ApoE mutations in lipoprotein glomerulopathy occurred in the LDL-receptor binding site, and these mutations might result in reduced binding capacity of ApoE protein to the LDL receptor.

    “Nearly half of mutations occurred in the LDL-receptor binding site (LRBS), such as ApoE Sendai (Arg145Pro) [2], ApoE Chicago (Arg147Cys) [16], ApoE Guangzhou (Arg150Pro)[17], ApoE Modena (Arg 150Cys) [11], ApoE Okayama (Arg150Gly) [18], ApoE Tokyo (Del 141-143) [19], and ApoE Maebasi (Del 142-144). These mutations might result in reduced binding capacity of ApoE protein to LDL receptor.”
  • ApoE Guangzhou (Arg150Pro) has been reported in China.

    “apoE Chicago (Arg147Pro) 8) and apoE Guangzhou (Arg150Pro) 9) have been reported in the United States and China, respectively.”

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Authors
Luo, B., Huang, F., Liu, Q., Li, X., Chen, W., Zhou, S.-F., & Yu, X.
Affiliations
  • Sun Yat-sen University (CN)
  • Guangzhou Medical University (CN)
  • RMIT University (AU)
Venue
American Journal of Nephrology
Publisher
S. Karger AG
Published
2007-11-29
Volume
28
Issue
2
Pages
347-353
ISSN
  • 0250-8095 (ISSN-L)
  • 1421-9670
OpenAlex
W2006927821
Cited by
36
References
2
Citations by year
2025: 2 · 2024: 1 · 2022: 5 · 2021: 2 · 2020: 1 · 2019: 4 · 2018: 1 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 6 · 2012: 2
FWCI
0.48
Type
journal article
Language
en
Open access
Locations
  • American Journal of Nephrology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • RMIT Research Repository (RMIT University Library) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Topics
  • Health Sciences › Medicine › Nephrology › Renal Diseases and Glomerulopathies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
Keywords
apolipoprotein E, lipoprotein glomerulopathy, missense mutations, familial inheritance, proteinuria, Chinese patients, lipid binding
MeSH terms
Adult, Aged, Apolipoproteins E, Arginine, Family Health, Female, Humans, Kidney Glomerulus, Lipids, Lipoproteins, Male, Middle Aged, Molecular Conformation, Mutation, Nephrotic Syndrome, Mutation, Missense

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