Endocrine Abstracts

The testis provides stem cell niches which are populated by spermatogonial stem cells. The seminiferous epithelium is the exclusive site where germline cells are proliferating and entering meiosis in the adult organism. The existence of stem cells offers clinically relevant options for preservation and restoration of male fertility. New approaches based on male germ cell transplantation and testicular tissue grafting can be applied to generate sperm. Germ cell transplantation ...

Immature testicular tissue was successfully xenografted in several species but did not lead to spermatogenesis with tissue obtained from the non-human primate Callithrix jacchus. Previous data indicate that the microenvironment provided by the mouse host might cause this failure. We conducted an in vivo study performing autologous ectopic transplantation of testicular fragments in newborn anaesthetised marmoset monkeys and compared transplanted animals to sham op...