Abstract:
:Primary congenital glaucoma (PCG) has been associated with CYP1B1 gene (2p21), with a predominantly autosomal recessive mode of inheritance. Our earlier studies attributed CYP1B1 mutations to only 40% of Indian PCG cases. In this study, we included 72 such PCG cases where CYP1B1 mutations were detected in only 12 patients in heterozygous condition, implying involvement of other gene(s). On screening these patients for mutations in myocilin (MYOC), another glaucoma-associated gene, using denaturing high-performance liquid chromatography followed by sequencing, we identified a patient who was double heterozygous at CYP1B1 (c.1103G>A; Arg368His) and MYOC (c.144G>T; Gln48His) loci, suggesting a digenic mode of inheritance of PCG. In addition, we identified the same MYOC mutation, implicated for primary open angle glaucoma, in three additional PCG patients who did not harbor any mutation in CYP1B1. These observations suggest a possible role of MYOC in PCG, which might be mediated via digenic interaction with CYP1B1 and/or an yet unidentified locus associated with the disease.
journal_name
Clin Genetjournal_title
Clinical geneticsauthors
Kaur K,Reddy AB,Mukhopadhyay A,Mandal AK,Hasnain SE,Ray K,Thomas R,Balasubramanian D,Chakrabarti Sdoi
10.1111/j.1399-0004.2005.00411.xsubject
Has Abstractpub_date
2005-04-01 00:00:00pages
335-40issue
4eissn
0009-9163issn
1399-0004pii
CGE411journal_volume
67pub_type
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