A: Primary renal fibroblasts cultured in the presence of Sema-7A–Fc exhibit a 2-fold increase in prematurely senescent cells after only 48 h in culture.
B: A cartoon depicting the vicious circle between dysfunctional endothelial secretome containing, among others, semaphorin 7A, and fibroblasts, which develop premature senescence and release SASP in turn affecting endothelial cells.