Mitochondrial DNA haplogroups confer differences in risk for age-related macular degeneration: a case control study

BMC Medical Genetics

Research Article

Kent Small¹  Kyaw Soe²  Jacqueline King²  Marilyn Chwa²  Jonathan Langberg²  Garrick Chak²  M Cristina Kenney²  Shari R Atilano²  Nitin Udar²  Andrew Nobe²  Nikan Khatibi²  Feilin Zhu²  Masood Memarzadeh²  Anthony B Nesburn³  Dieter Hertzog⁴  Elizabeth Yang⁵  David S Boyer⁶ 

[1] Cedars-Sinai Medical Center, Los Angeles, CA, USA;Gavin Herbert Eye Institute, Univeresity of California Irvine, Hewitt Hall, Room 2028, 843 Health Science Rd, 92697, Irvine, CA, USA;Gavin Herbert Eye Institute, Univeresity of California Irvine, Hewitt Hall, Room 2028, 843 Health Science Rd, 92697, Irvine, CA, USA;Cedars-Sinai Medical Center, Los Angeles, CA, USA;Gavin Herbert Eye Institute, Univeresity of California Irvine, Hewitt Hall, Room 2028, 843 Health Science Rd, 92697, Irvine, CA, USA;Loma Linda University School of Medicine, Loma Linda, CA, USA;Northwestern Feinberg School of Medicine, Chicago, IL, USA;Retina-Vitreous Associates Medical Group, Beverly Hills, CA, USA;

关键词: Age-related macular degeneration;    Mitochondrial haplogroups;    mtDNA;    CFH;    ARMS2;   

DOI  :  10.1186/1471-2350-14-4

 received in 2012-05-21, accepted in 2012-12-17,  发布年份 2013

来源: Springer

【 摘 要 】

BackgroundAge-related macular degeneration (AMD) is the leading cause of vision loss in elderly, Caucasian populations. There is strong evidence that mitochondrial dysfunction and oxidative stress play a role in the cell death found in AMD retinas. The purpose of this study was to examine the association of the Caucasian mitochondrial JTU haplogroup cluster with AMD. We also assessed for gender bias and additive risk with known high risk nuclear gene SNPs, ARMS2/LOC387715 (G > T; Ala69Ser, rs10490924) and CFH (T > C; Try402His, rs1061170).MethodsTotal DNA was isolated from 162 AMD subjects and 164 age-matched control subjects located in Los Angeles, California, USA. Polymerase chain reaction (PCR) and restriction enzyme digestion were used to identify the J, U, T, and H mitochondrial haplogroups and the ARMS2-rs10490924 and CFH-rs1061170 SNPs. PCR amplified products were sequenced to verify the nucleotide substitutions for the haplogroups and ARMS2 gene.ResultsThe JTU haplogroup cluster occurred in 34% (55/162) of AMD subjects versus 15% (24/164) of normal (OR = 2.99; p = 0.0001). This association was slightly greater in males (OR = 3.98, p = 0.005) than the female population (OR = 3.02, p = 0.001). Assuming a dominant effect, the risk alleles for the ARMS2 (rs10490924; p = 0.00001) and CFH (rs1061170; p = 0.027) SNPs were significantly associated with total AMD populations. We found there was no additive risk for the ARMS2 (rs10490924) or CFH (rs1061170) SNPs on the JTU haplogroup background.ConclusionsThere is a strong association of the JTU haplogroup cluster with AMD. In our Southern California population, the ARMS2 (rs10490924) and CFH (rs1061170) genes were significantly but independently associated with AMD. SNPs defining the JTU mitochondrial haplogroup cluster may change the retinal bioenergetics and play a significant role in the pathogenesis of AMD.

【 授权许可】

CC BY   
© Kenney et al.; licensee BioMed Central Ltd. 2013