Résumé
Ocular surface tissues are vulnerable to various stimuli from the external environment,including microbial invasion,mechanical damage,chemical stimulation,dust,UV light,and allergen stimulation.Conjunctival goblet cells play an important role in maintaining ocular surface self-homeostasis and health.These cells are the only unicellular glands in humans and mammals that are mainly distributed in the epithelium of the digestive tract,respiratory tract,and the ocular surface.Many factors affect goblet cell development and differentiation,especially the newly discovered molecule Spdef,which is a transcription factor found in the ETS family.The main function of conjunctival goblet cells is to secrete mucin to protect and lubricate the ocular surface;however,they also secrete a variety of other bioactive substances.Recent studies have demonstrated that goblet cells are involved in antigen presentation,regulation of dendritic cell phenotype differentiation,and induction of immune tolerance on the mucosa.Many ocular surface diseases,such as dry eye,will alter density and function of conjunctival goblet cells.Therefore,ophthalmologists should be concerned about the biological behavior of conjunctival goblet cells and the relationship between them and ocular surface diseases.
Résumé
Objective To investigate the influence of CD146-siRNA on epithelial-mesenchymal transition in human ovarian cancer cell line A2780.Methods The influence of loss of CD146 on the mRNA and protein expressions of E-cadherin,vimentin,and fibronectin was evaluated by real-time polymerase chain reaction (RT-PCR) and Western blotting.Results Compared to non-transfected (control group) and those transfected with RNAi-NC (RNAi negative control group),the mRNA and protein expressions of Ecadherin were significantly increased in A2780 cell lines transfected with RNAi-CD146.The loss of CD146 expression down-regulated the mRNA and protein expression of vimentin and fibronectin(P ＜ 0.05).Conclusions CD146-siRNA can suppress epithelial-mesenchymal transition in human ovarian cancer cell line A2780.