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Laser Capture Microdissection of Highly Pure Trabecular Meshwork from Mouse Eyes for Gene Expression Analysis
Published on: June 3, 2018
Interaction between two glaucoma genes, optineurin and myocilin
Bum-Chan Park1, Martin Tibudan, Mishan Samaraweera
1Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago College of Medicine, Chicago, IL, USA.
Genes to Cells : Devoted to Molecular & Cellular Mechanisms
|August 1, 2007
Summary
Optineurin (OPTN) up-regulates myocilin (MYOC) gene expression, a key factor in glaucoma. This interaction primarily affects MYOC mRNA stability, suggesting a novel regulatory pathway for this blinding disease.
Area of Science:
- Genetics
- Ophthalmology
- Molecular Biology
Background:
- Myocilin (MYOC) and optineurin (OPTN) are implicated in glaucoma pathogenesis.
- Understanding the molecular interplay between MYOC and OPTN is crucial for glaucoma research.
Purpose of the Study:
- To investigate the molecular interactions between MYOC and OPTN.
- To determine how MYOC and OPTN influence each other's expression levels.
Main Methods:
- Over-expression of MYOC and OPTN in human trabecular meshwork (TM) cells and PC12 cells.
- Analysis of endogenous gene levels, mRNA turnover rates, and promoter activity.
- Cellular localization studies of over-expressed OPTN.
Main Results:
- Over-expressing MYOC did not alter OPTN levels.
- Over-expressing OPTN led to increased endogenous MYOC levels in various cell types.
- OPTN over-expression prolonged MYOC mRNA turnover but minimally affected MYOC promoter activity.
- Both MYOC and OPTN levels increased during PC12 cell differentiation induced by nerve growth factor (NGF).
Conclusions:
- A molecular interaction exists between OPTN and MYOC.
- OPTN regulates MYOC expression primarily by controlling MYOC mRNA stability.
- This finding provides insights into the molecular mechanisms underlying glaucoma.
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