Exploring a peptidomimetic approach of N-cadherin in modulating fibroblast growth factor receptor signaling for corneal endothelial regeneration
Endothelial rejection and a critical shortage of corneal transplants present an unmet medical need in corneal regeneration research area. Although basic fibroblast growth factor (bFGF) is a potent mitogenic factor for corneal ex vivo expansion, it is also a morphogen eliciting unfavorable endothelial-mesenchymal transition (EnMT) of corneal endothelial cells. A pharmacological reagent that retains the beneficial proliferative effect while lacking the EnMT effect of bFGF would be of great potential in corneal regeneration. In present study, we demonstrated that bFGF not only activated the canonical fibroblast growth factor receptor 1 (FGFR1) tyrosine kinase pathway, but also further upregulated matrix metalloproteinase activity to cleave N-cadherin into N-terminus and C-terminus fragments, which activated the classical FGFR1 tyrosine kinase pathway and a cryptic β-catenin pathway to affect corneal proliferation and EnMT, respectively. We generated the synthetic peptides resembling a critical motif in the ectodomain of N-cadherin and found these peptides enhanced downstream proliferative signaling of FGFR1 but without seemingly EnMT effect. The potential of these peptides can be demonstrated on both ex vivo cell culture and in vivo rat cryo-injury model. Our study indicated this peptidomimetic approach of N-cadherin can stimulate corneal regeneration and offer a promising therapeutic option to treat corneal endothelial dysfunction.Keywords: FGFR; N-cadherin; basic fibroblast growth factor; endothelial mesenchymal transition; β-catenin.
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基因水平:PCR Array、RT-PCR、PCR、单细胞测序
蛋白水平:MSD、Luminex、CBA、Elispot、Antibody Array、ELISA、Sengenics
细胞水平:细胞染色、细胞分选、细胞培养、细胞功能
组织水平:空间多组学、多重荧光免疫组化、免疫组化、免疫荧光
数据分析:流式数据分析、组化数据分析、多因子数据分析
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