Mutations in LRPAP1 are associated with severe myopia in humans.
Am J Hum Genet
; 93(2): 313-20, 2013 Aug 08.
Article
em En
| MEDLINE
| ID: mdl-23830514
ABSTRACT
Myopia is an extremely common eye disorder but the pathogenesis of its isolated form, which accounts for the overwhelming majority of cases, remains poorly understood. There is strong evidence for genetic predisposition to myopia, but determining myopia genetic risk factors has been difficult to achieve. We have identified Mendelian forms of myopia in four consanguineous families and implemented exome/autozygome analysis to identify homozygous truncating variants in LRPAP1 and CTSH as the likely causal mutations. LRPAP1 encodes a chaperone of LRP1, which is known to influence TGF-ß activity. Interestingly, we observed marked deficiency of LRP1 and upregulation of TGF-ß in cells from affected individuals, the latter being consistent with available data on the role of TGF-ß in the remodeling of the sclera in myopia and the high frequency of myopia in individuals with Marfan syndrome who characteristically have upregulation of TGF-ß signaling. CTSH, on the other hand, encodes a protease and we show that deficiency of the murine ortholog results in markedly abnormal globes consistent with the observed human phenotype. Our data highlight a role for LRPAP1 and CTSH in myopia genetics and demonstrate the power of Mendelian forms in illuminating new molecular mechanisms that may be relevant to common phenotypes.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fator de Crescimento Transformador beta
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Proteína-1 Relacionada a Receptor de Lipoproteína de Baixa Densidade
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Proteína Associada a Proteínas Relacionadas a Receptor de LDL
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Catepsina H
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Síndrome de Marfan
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Mutação
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Miopia
Tipo de estudo:
Prognostic_studies
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Risk_factors_studies
Limite:
Adolescent
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Animals
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
Idioma:
En
Revista:
Am J Hum Genet
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Arábia Saudita