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Inicio Archivos de la Sociedad Española de Oftalmología (English Edition) Influence of CFH, HTRA1 and ARMS2 haplotype polymorphisms in the development of ...
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Vol. 88. Issue 1.
Pages 3-10 (January 2013)
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Vol. 88. Issue 1.
Pages 3-10 (January 2013)
Original article
Influence of CFH, HTRA1 and ARMS2 haplotype polymorphisms in the development of age-related macular disease
Influencia de haplotipos de polimorfismos de CFH, HTRA1 y ARMS2 en la aparición de degeneración macular asociada a la edad
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F. Cruz-Gonzáleza,
Corresponding author
cruzgonzalez.fernando@gmail.com

Corresponding author.
, R. Lorenzo-Péreza, C. Cañete-Camposa, E. Hernández-Galileaa, R. González-Sarmientob
a Servicio de Oftlamología, Hospital Universitario de Salamanca, Salamanca, Spain
b Laboratorio de Medicina Molecular, Facultad de Medicina, Universidad de Salamanca, Salamanca, Spain
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Tables (2)
Table 1. Differences in genotype distribution of CFH polymorphisms HTRA1 and ARMS2 in patients with age-related macular degeneration and healthy controls.
Table 2. Haplotype distribution of ARMS2, HTRA1 polymorphisms of CFH in patient and control groups.
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Abstract
Objective

To demonstrate genetic influence on the onset of age-related macular disease (AMD), analyzing genotype distribution of haplotypes, including polymorphisms of genes with proved relationships with AMD risk (CFH, ARMS2, HTRA1) in patients with AMD and in healthy people.

Methods

We took 101 consecutive patients with an AMD diagnosis following Wisconsin international classification. For our control group, we took 91 patients without AMD or any significant macular changes. We analyzed CFH rs 1410996, ARMS2 rs 10940923 polymorphisms using real time PCR with Taqman probes, and HTRA1-625 using restriction endonuclease digestion.

We studied haplotypes by simultaneously combining genotypes which, in previous studies, had been shown to have relationship with AMD (CFH, ARMS2, HTRA1) in patients with AMD and healthy people.

Results

There was a statistically significant higher proportion of patients with AMD simultaneously expressing CFH GG (rs 1410996) and ARMS2 TT (rs 10940923) (p=.037; OR: 7.742 [1.010–63.156]); ARMS2 TT (rs 10940923) and HTRA 1-625 TT (p=.001; OR: 9.006 [2.019–40.168]) and CFH GG (rs 1410996), ARMS2 TT (rs 1040923) and HTRA1-625 GG (p=.043; OR: 6.702 [1.003–55.565]) genotypes.

Conclusions

Haplotypes which combine “risk genotypes”, demonstrated in previous studies, of our analyzed polymorphisms are more frequent in patients with AMD than in the control group, and they seem to increase the risk of suffering the disease in our population.

Keywords:
Age-related macular disease
Genetics
Haplotypes
CFH
ARMS2
HTRA1
Resumen
Propósito

Demostrar la influencia genética en el desarrollo de degeneración macular asociada a la edad (DMAE) analizando las distribuciones genotípicas de haplotipos de polimorfismos de genes con relación demostrada con la aparición de DMAE (CFH, ARMS2, HTRA1) en pacientes con DMAE y personas sanas.

Método

Se tomaron 101 pacientes diagnosticados de DMAE (74 exudativa y 27 atrófica) según las normas del sistema internacional de clasificación Wisconsin. Como control se tomaron 91 pacientes sin DMAE ni otras alteraciones maculares. Se analizó el polimorfismo rs 1410996 del gen CFH, el rs 10940923 de ARMS2 mediante PCR a tiempo real con sondas Taqman y el HTRA1-625 mediante digestión con endonucleasas de restricción.

Se estudió la presencia de haplotipos que combinaban los genotipos que habían demostrado aumentar el riesgo de DMAE de los polimorfismos estudiados de CFH, HTRA1 y ARMS2 en estudios previos en nuestro grupo de pacientes y el grupo control.

Resultados

Se demostró que es más frecuente en el grupo de pacientes, de forma estadísticamente significativa, la expresión simultánea de los genotipos GG de CFH (rs 1410996) y TT de ARMS2 (rs 10940923) (p=0,037; OR: 7,742 [1,010-63,156]); TT de ARMS2 (rs 10940923) y GG de HTRA1-625 (p=0,001; OR: 9,006 [2,019-40,168]) y GG de CFH (rs 1410996), TT de ARMS2 (rs 1040923) y GG de HTRA1-625 (p=0,043; OR: 6,702 [1,003-55,565]).

Conclusiones

La presencia de haplotipos que combinan genotipos, considerados de riesgo en estudios previos, de los polimorfismos analizados es más frecuente en pacientes con DMAE y parece aumentar el riesgo de padecer la enfermedad en nuestra población.

Palabras clave:
Degeneración macular asociada a la edad
Genética
Haplotipos
CFH
ARMS2
HTRA1

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