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Transporter associated with antigen processing gene 1 codon 333 and codon 637 polymorphisms are associated with
Hui-Ju Lin1, Chang Hai Tsai, Fuu-Jen Tsai
1Department of Ophthalmology, China Medical University Hospital, Taichung, Taiwan..
Molecular Diagnosis : a Journal Devoted to the Understanding of Human Disease Through the Clinical Application of Molecular Biology
|May 13, 2005
Summary
Genetic variations in transporter associated with antigen processing (TAP) genes, specifically TAP1-1 and TAP1-2, are associated with primary open-angle glaucoma (POAG). These findings suggest TAP gene polymorphisms may serve as potential biomarkers for POAG susceptibility.
Area of Science:
- Immunogenetics
- Ophthalmology
- Molecular Biology
Background:
- Genetic factors influencing the immune system are implicated in the development of glaucoma.
- Primary open-angle glaucoma (POAG) diagnosis often occurs after irreversible vision loss due to a lack of predictive markers.
- The transporter associated with antigen processing (TAP) genes are key components of the immune system.
Purpose of the Study:
- To investigate the association between specific transporter associated with antigen processing (TAP) gene polymorphisms and primary open-angle glaucoma (POAG).
- To determine if TAP1 and TAP2 gene polymorphisms can serve as predictive markers for POAG susceptibility.
Main Methods:
- A case-control study involving 66 POAG patients and 105 healthy volunteers.
- Polymerase chain reaction (PCR)-based analysis was employed to identify TAP1 and TAP2 gene polymorphisms.
Main Results:
- Significant differences in TAP1-1 codon 333 and TAP1-2 codon 637 gene polymorphisms were observed between POAG patients and healthy controls (p=0.0375 and p=0.01, respectively).
- Specific genotypes, TAP1-1 "GG" homozygote and TAP1-2 "GG" homozygote, showed significant associations with POAG.
- No significant differences were found for TAP2 gene polymorphisms (TAP2-1, TAP2-2, TAP2-3) between the groups.
Conclusions:
- TAP1-1 codon 333 and TAP1-2 codon 637 gene polymorphisms are identified as potential genetic markers for POAG.
- These TAP1 gene polymorphisms may influence the immune system's role in the pathogenesis of POAG through post-transcriptional modifications.
- Further research into TAP gene variations could lead to improved diagnostic and prognostic tools for glaucoma.