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Mechanical Stimulation-induced Calcium Wave Propagation in Cell Monolayers: The Example of Bovine Corneal Endothelial Cells
Published on: July 16, 2013
[Expression and function of receptors for advanced glycation end products in bovine corneal endothelial cells]
1University of Tsukuba, Institute of Clinical Medicine, Department of Ophthalmology, 1-1-1 Tennoudai, Tsukuba 305-8575, Japan. kajiyuichi@hotmail.com
Abstract:
Corneal endothelial cell loss is a change that occurs with age, but its mechanism is still unclear. We postulated that interaction between advanced glycation end product(AGE) and its receptors is implicated in the corneal endothelial cell loss with age. We investigated the expression of AGE receptors: receptors for AGE(RAGE) and galectin-3 in bovine corneal endothelial cells by reverse transcription-polymerase chain reaction(RT-PCR) and immunohistochemistry. In addition, we investigated the effect of AGE on the cultured corneal endothelial cells. Expression of RAGE and galectin-3 was detected in bovine corneal endothelial cells. Galectin-3 was important in the internalization of AGE. In contrast, RAGE was important in the generation of reactive oxygen species and induction of apoptosis. Based on these data, the interaction of AGE in aqueous humor and AGE receptors expressed on the corneal endothelial cells was speculated to have a role in the corneal endothelial cell loss with age.
Insights
Advanced glycation end product (AGE) interactions with corneal receptors contribute to age-related corneal endothelial cell loss. AGE receptor (RAGE) and galectin-3 play distinct roles in this process.
Area of Science:
- Ophthalmology
- Cell Biology
- Aging Research
Background:
- Corneal endothelial cell loss is a common age-related change with an unclear mechanism.
- Advanced glycation end products (AGEs) are implicated in cellular aging and damage.
Purpose of the Study:
- To investigate the role of AGE-receptor interactions in age-related corneal endothelial cell loss.
- To examine the expression and function of AGE receptors (RAGE and galectin-3) in bovine corneal endothelial cells.
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR) to detect gene expression.
- Immunohistochemistry to visualize protein localization.
- In vitro studies on cultured corneal endothelial cells exposed to AGEs.
Main Results:
- RAGE and galectin-3 were expressed in bovine corneal endothelial cells.
- Galectin-3 mediated AGE internalization.
- RAGE was involved in reactive oxygen species generation and apoptosis induction.
Conclusions:
- AGE-receptor interactions are a potential mechanism for age-related corneal endothelial cell loss.
- RAGE and galectin-3 play differential roles in AGE-induced cellular responses.
- Targeting these pathways may offer therapeutic strategies for age-related corneal changes.
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