RESUMO
Objective The aim of the study was to investigate the effects of inflammation on the biological be-haviors of the VF -MSCs and provide the theoretic basis for the repair of the vocal folds which were damaged by in-flammation .Methods The inflammatory vocal fold tissues and normal vocal fold tissues were respectively derived from the vocal cord polyp and normal tissues of the hypopharyngeal carcinoma patients .The HE staining ,masson trichrome staining and elastin van gieson (EVG) staining were performed to detect the effects of inflammation on the collagenous fiber and elastic fibers of the vocal fold lamina propria .The cell colony formation analysis and MTT cell growth curve were used to detect the effects of inflammation on the proliferation of VF -MSCs .The effects of in-flammation on the multi-directional differentiation of VF -MSCs were evaluated by inducing the VF -MSCs to dif-ferentiate into osteoblasts and lipoblasts .Results The results of masson trichrome staining and EVG staining showed that in the inflammatory vocal fold lamina propria collagen fibers became thicker and the amount of collagen fibers increased ,while elastic fibers became thinner and the amount of elastic fibers decreased .Compared with the vocal fold mesenchymal stem cell (VF-MSCs) in normal vocal folds ,VF-MSCs in inflammatory vocal folds pro-liferated more significantly ,but the osteogenic differentiation and adipogenic differentiation of VF -MSCs in inflammatory vocal folds were restrained .Conclusion Inflammation enhanced the compressive resistance ,abated the elasticity , and restrained the multi -directional differentiation of VF -MSCs .
