All-Trans Retinoic Acid Regulates Cx43 Expression, Gap Junction Communication and Differentiation in Primary Lens Epithelial Cells

被引:30
作者
Long, Amy C. [1 ]
Bomser, Joshua A. [1 ]
Grzybowski, Deborah M. [1 ]
Chandler, Heather L. [1 ]
机构
[1] Ohio State Univ, Dept Human Nutr, Dept Ophthalmol,Dept Vet Clin Sci, Ctr Biomed Engn,Coll Optometry, Columbus, OH 43210 USA
关键词
All-trans retinoic acid; Connexin; 43; Differentiation; Gap Junction; Lens epithelial cells; CONNEXIN43; GENE-EXPRESSION; INTERCELLULAR COMMUNICATION; METABOLIC COOPERATION; GLYCYRRHETINIC ACID; CRYSTALLIN GENE; MAMMALIAN LENS; UP-REGULATION; DYE TRANSFER; CYCLIC-AMP; IN-VITRO;
D O I
10.3109/02713681003770746
中图分类号
R77 [眼科学];
学科分类号
100212 [眼科学];
摘要
Purpose: To examine the effect of all-trans retinoic acid (ATRA) treatment on connexin 43 (Cx43) expression, gap junction intercellular communication (GJIC), and cellular differentiation in primary canine lens epithelial cells (LEC). Methods and Materials: Dose and time-dependent effects of ATRA on Cx43 protein, mRNA and GJIC, were assessed by immunoblotting, quantitative reverse transcription polymerase chain reaction (qRT-PCR), and scrape loading/dye transfer assays, respectively. Expression of beta crystallin was evaluated by immunoblotting. Results: Treatment with ATRA at non-cytotoxic concentrations significantly increased Cx43 protein, mRNA and GJIC in primary canine LEC. Treatment with ATRA for five and seven days increased levels of beta crystallin, a protein marker of LEC differentiation. Inhibition of GJIC via pre-treatment with a synthetic inhibitor, 18-alpha glycyrrethinic acid (AGA), reduced ATRA-induced increases in Cx43 and GJIC and partially blocked ATRA-induced beta crystallin protein. Conclusions: Treatment with ATRA significantly increased Cx43 expression and GJIC in canine LEC, and these effects were associated with increased LEC differentiation. Results from this study suggest that functional gap junctions may play a role in the modulation of cellular differentiation in primary canine LEC.
引用
收藏
页码:670 / 679
页数:10
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