Autocrine IL-1 beta mediates the promotion of corneal neovascularization by senescent fibroblasts

作者：Dong, Muchen; Yang, Lingling; Qu, Mingli; Hu, Xiaoli; Duan, Haoyun; Zhang, Xiaoping; Shi, Weiyun; Zhou, Qingjun^*

来源：American Journal of Physiology - Cell Physiology, 2018, 315(5): C734-C743.

DOI：10.1152/ajpcell.00205.2017

• cellular senescence
• corneal fibroblasts
• IL-1 beta
• neovascularization

Our previous study has confirmed that senescent fibroblasts promote corneal neovascularization (CNV) partially via the enhanced secretion of matrix metalloproteases (MMPs). However, the regulation of MMP expression in senescent fibroblasts remained unclear. In this study, we identified that the expression and secretion levels of interleukin-1 beta (IL-1 beta) were significantly upregulated in senescent human corneal fibroblasts than that in normal fibroblasts. Moreover, compared with vehicle-pretreated senescent fibroblasts, IL-1 beta pretreatment enhanced the expression of angiogenic factors but reduced the expression of angiostatic factors in senescent fibroblasts. When cocultured with human umbilical vein endothelial cells, IL-1 beta-pretreated senescent fibroblasts more strongly promoted their proliferation, migration, and tube-formation capacities than the vehicle-controlled senescent fibroblasts. In addition, either interleukin- 1 receptor antagonist or anti-IL-1 beta neutralization completely inhibited the promotion of senescent fibroblasts in vascular tube formation in vitro and CNV in vivo. Therefore, we concluded that autocrine IL-1 beta mediated the promotion of senescent fibroblasts on corneal neovascularization.

• 出版日期2018-11
• 单位山东省医学科学院; 山东省眼科研究所