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Mutation in a short-chain collagen gene, CTRP5 , results in extracellular deposit formation in late-onset retinal degeneration: a genetic model for age-related macular degeneration
Abstract
A primary feature of age-related macular degeneration (AMD) is the presence of extracellular deposits between the retinal pigment epithelium (RPE) and underlying Bruch's membrane, leading to RPE dysfunction, photoreceptor death and severe visual loss. AMD accounts for about 50% of blind registrations in Western countries and is a common, genetically complex disorder. Very little is known regarding its molecular basis. Late-onset retinal degeneration (L-ORD) is an autosomal dominant disorder with striking clinical and pathological similarity to AMD. Here we show that L-ORD is genetically heterogeneous and that a proposed founder mutation in the CTRP5 (C1QTNF5) gene, which encodes a novel short-chain collagen, changes a highly conserved serine to arginine (Ser163Arg) in 7/14 L-ORD families and 0/1000 control individuals. The mutation occurs in the gC1q domain of CTRP5 and results in abnormal high molecular weight aggregate formation which may alter its higher-order structure and interactions. These results indicate a novel disease mechanism involving abnormal adhesion between RPE and Bruch's membrane.
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“A gene (C1QTNF5) mutated in patients with an autosomal dominant late-onset retinal/macular degeneration with sub-RPE deposits similar to AMD has also been examined (68).”
From Unraveling a Multifactorial Late-Onset Disease: From Genetic Susceptibility to Disease Mechanisms for Age-Related Macular Degeneration (2009) · cites this paper as [68]
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InfluentialSelf-citationLate-Onset Retinal Degeneration: Clinical Perspectives
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“L-ORD, maps to chromosome 11q23 and influences wide-ranging processes that include 8 cellular adhesion and basement membrane functions.(27,28) 9 The question of increased risk of angle-closure glaucoma is perhaps not surprising 10 given that people with late-onset LAZ are more likely to be older, hyperopic, and female.”
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“TheMfrp and Ctrp5 genes are expressed as a bicistronic transcript, in which the complete open reading frame ofCtrp5 located within the 30-untranslated region (30UTR) of theMfrp gene.(8) It is not surprising that the MFRP and CTRP5 proteins both exist in the posterior eye, with the highest level in the RPE and ciliary…”
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“The functional consequences of the Ser163Arg mutation in the gC1q domain appear to be destabilisation and aggregation of the protein as a result of an abnormal surface charge ( Hayward et al., 2003 ).”
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“C1QTNF5 is a short-chain collagen gene, and the mutation responsible for LAZ and L-ORD in described families is characterized by a serine to arginine (S163R) substitution (Ayyagari et al., 2005; Hayward et al., 2003; Subrayan et al., 2005).”
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CTRP13 ablation improves systemic glucose and lipid metabolism
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“Additional functions of CTRPs have also been established in the cardiovascular system [31 e 42], kidney [43,44], gut [45], eye [46,47], musculoskeletal system [48 e 50], and brain [51 e 53].”
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“…was first associated by Hayward et al. [10] in 2003 with the founder mutation (c.489C > G; p. Ser163Arg) of the short-chain collagen gene C1QTNF5 , previously known as CTRP5, leading to an extracellular deposit formation between the basal RPE and the Bruch membrane (BM) compatible with RPD [9, 10].”
Late-Onset Retinal Degeneration: Clinical Features and C1QTNF5/CTRP5 Function
Fernández, A. A.-C., & Carr, A. F. (2025) · Advances in experimental medicine and biology · doi:10.1007/978-3-031-76550-6_83 · Cited by 1
Zhao, A. T., Wibbelsman, T. D., Calotti, M., Richards, C. J., & Vrabec, T. R. (2025) · American Journal of Ophthalmology Case Reports · doi:10.1016/j.ajoc.2025.102497 · Cited by 1
Inherited retinal disorders in Scotland: A 5 year assessment
Hazelwood, J. E., Sevgi, M., Osborne, F., Staniszewski, B., George, N. D. L., Ionean, A., Gilmour, D. F., & Megaw, R. D. (2026) · Eye · doi:10.1038/s41433-025-04216-z · Cited by 1
“Additionally, key founder mutations including the C1QTNF mutation of Late Onset Retinal Degeneration (LORD) have their origins in Scotland [15].”
LATE-ONSET RETINAL MACULAR DEGENERATION: AN ENTITY NOT TO BE OVERLOOKED
Agarwal, A., Law, J. C., & Tarantola, R. M. (2010) · Retinal Cases & Brief Reports · doi:10.1097/icb.0b013e3181ae71b6 · Cited by 1
Silva, E. D., & Sundin, O. H. (2012) · doi:10.1093/med/9780195326147.003.0004 · Cited by 1
Racemization Hypothesis of COVID-19. Tip of the Iceberg
(2020) · Journal of Psychology and Neuroscience · doi:10.47485/2693-2490.1033 · Cited by 1
Sommer, J. R., Chavali, V. R. M., Simpson, S. G., Ayyagari, R., & Petters, R. M. (2012) · PubMed Central
Function and pathology of the human retinal pigment epithelium
Booij, J. C. (2010) · UvA-DARE (University of Amsterdam)
Genetics of Ocular Vascular Disease
Greenberg, J., Ziskind, A., & Daiger, S. P. (2007) · Humana Press eBooks · doi:10.1007/978-1-59745-047-8_10
Common forms of visual handicap
Wright, A. F. (2007) · Cambridge University Press eBooks · doi:10.1017/cbo9780511543555.033
Self-citationGenetic Abnormalities of the Retina and Choroid
Brar, V. S., Nasir, M., Sahni, D. R., Randolph, J., & Couser, N. L. (2018) · Elsevier eBooks · doi:10.1016/b978-0-323-65414-2.00011-8
Degenerative Night-Blinding Disorders and Cone and Cone–Rod Dystrophies
Kheir, W. J., Yu, M., Senatore, A., Racioppi, A., Gattegna, R., Creel, D. J., & Iannaccone, A. (2019) · Springer eBooks · doi:10.1007/978-3-030-30417-1_6
(2017) · Elsevier eBooks · doi:10.1016/b978-0-12-805313-3.00019-3
Genetic disorders causing non-syndromic retinopathy
(2022) · Elsevier eBooks · doi:10.1016/b978-0-12-813944-8.00013-5
Audo, I. S., Meunier, I., & Sahel, J. (2021) · Springer eBooks · doi:10.1007/978-3-319-90495-5_3-1
Olsen, B. R. (2004) · Matrix Biology · doi:10.1016/j.matbio.2004.09.002
Loss of CTRP10 results in female obesity with preserved metabolic healthPreprint
Chen, F., Sarver, D. C., Saqib, M., Vélez, L. M., Aja, S. M., Seldin, M. M., & Wong, G. W. (2025) · eLife · doi:10.7554/elife.93373.2
Zhang, P., Quinodoz, M., Ong, C., Ho, J. R. Y., Tang, R. W. C., Tan, T., Chan, C. M., Mathur, R., Tay, H. G., Rivolta, C., et al. (2026) · Ophthalmic Genetics · doi:10.1080/13816810.2026.2644217 · Cited by 1
“2:c.489C > G (p.Ser163Arg) variant was subsequently identified in affected members of a large autosomal dominant pedigree of English descent with late-onset retinal degeneration, through linkage analysis and subsequent positional cloning (10).”
Widening the Spectrum of Disease Expression due to Heterozygous Variants in EFEMP1
Stanton, C. M., Ansari, G., Pfau, K., Lipsky, T., Halachev, M. R., Gerasimavicius, L., Drake, C., Marsh, J. A., Hayward, C., Sumaroka, A., et al. (2026) · JAMA Ophthalmology · doi:10.1001/jamaophthalmol.2026.3828 · Cited by 1
Self-citation
Metadata
- Authors
- Hayward, C., Shu, X., Cideciyan, A. V., Lennon, A., Barran, P., Zareparsi, S., Sawyer, L., Hendry, G., Dhillon, B., Milam, A. H., Luthert, P. J., Swaroop, A., Hastie, N. D., Jacobson, S. G., & Wright, A. F.
- Affiliations
- Western General Hospital (GB)
- University of Pennsylvania (US)
- University of Michigan (US)
- University College London (GB)
- ORCID
- Venue
- Human Molecular Genetics
- Publisher
- Oxford University Press (OUP)
- Published
- 2003-10-15
- Volume
- 12
- Issue
- 20
- Pages
- 2657-2667
- ISSN
- 0964-6906 (ISSN-L)
- 1460-2083
- OpenAlex
- W2101414552
- Cited by
- 191
- References
- 30
- Citations by year
- 2026: 4 · 2025: 9 · 2024: 5 · 2023: 11 · 2022: 6 · 2021: 11 · 2020: 9 · 2019: 8 · 2018: 10 · 2017: 6 · 2016: 10 · 2015: 7 · 2014: 13 · 2013: 5 · 2012: 14
- FWCI
- 8.20
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Human Molecular Genetics (publishedVersion)
- PubMed (publishedVersion)
- ResearchOnline (Glasgow Caledonian University) (acceptedVersion)
- UCL Discovery (University College London) (submittedVersion)
- Funders
- National Eye Institute (EY-13203, EY 13729, U10EY013729, EY13385, R01EY013203, R01EY013385)
- Topics
- Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
- Health Sciences › Medicine › Ophthalmology › Retinal Development and Disorders
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Retinal Imaging and Analysis
- Keywords
- CTRP5, late-onset retinal degeneration, age-related macular degeneration, retinal pigment epithelium, Bruch's membrane, founder mutation, genetic heterogeneity, protein aggregation, autosomal dominant inheritance
- MeSH terms
- Aged, Aged, 80 and over, Aging, Amino Acid Sequence, Chromosome Mapping, Collagen, Female, Genetic Markers, Haplotypes, Humans, Immunohistochemistry, Macular Degeneration, Male, Middle Aged, Models, Genetic, Models, Molecular, Molecular Sequence Data, Mutation, Pedigree, Phenotype, Retina, Retinal Degeneration, Time Factors, Blotting, Western, Sequence Homology, Amino Acid, Protein Structure, Tertiary, Age of Onset
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