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ORIGINAL ARTICLE
Year : 2010  |  Volume : 5  |  Issue : 2  |  Page : 101-104

Myocilin Mutations Are Not a Major Cause of Primary Congenital Glaucoma in Iranian Patients


1 School of Biology; Department of Biotechnology, College of Science; Center of Excellence in Biomathematics, Statistics and Computer Science, University of Tehran, Tehran, Iran
2 National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
3 School of Biology, College of Science, University of Tehran, Tehran, Iran
4 Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Correspondence Address:
Shahin Yazdani
Associate Professor of Ophthalmology; Ophthalmic Research Center, No. 23, Boostan 9 St., Amir Ebrahimi St., Pasdaran Ave., Tehran 16666
Iran
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Source of Support: None, Conflict of Interest: None


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Purpose: To assess the frequency of mutations in the Myocilin (MYOC) gene in Iranian patients affected with primary congenital glaucoma (PCG). Methods: The individuals evaluated herein are among a larger cohort of 100 patients who had previously been screened for CYP1B1 mutations. Eighty subjects carried mutations in CYP1B1, but the remaining 20 patients who did not, underwent screening for MYOC mutations for the purpose of the study. MYOC exons in the DNA were polymerase chain reaction (PCR) amplified and sequenced. Sequencing was performed using PCR primers, the ABI big dye chemistry and an ABI3730XL instrument. Sequences were analyzed by comparing them to reference MYOC sequences using the Sequencher software. Results: Four MYOC sequence variations were observed among the patients, but none of them were considered to be associated with disease status. Three of these variations were single nucleotide polymorphisms already reported not to be disease causing, the fourth variation created a synonymous codon and did not affect any amino acid change. Conclusion: In this cohort, MYOC mutations were not observed in any Iranian subject with PCG. It is possible that in a larger sample, a few subjects carrying disease causing MYOC mutations could have been observed. But our results show that the contribution of MYOC to PCG status in Iran is small if any.


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