Fig. 1
From: Manipulation of spermatogonial stem cells in livestock species
Schematic representation of the SSC niche. GDNF - glial cell line-derived neurotropic factor. bFGF - basic fibroblast growth factor. CSF1 - colony-stimulating factor 1. VEGF - vascular endothelial growth factor. IGF1 – insulin-like growth factor 1. LE cell – interstitial lymphatic endothelial cells. PM cell - peritubular myoid cells. SSC - spermatogonial stem cell with the self-renewal ability. Adapted from [184], modified