Abstract
Buffalo is an economically important livestock species in Asia. Little is known about male germ line technology owing to lack of sufficient understanding regarding expression of germ- and somatic-cell specific-proteins in the testis. In this study, we identified UCHL-1 (PGP 9.5) and lectin- Dolichos biflorus agglutinin (DBA) as specific markers for spermatogonia in buffalo testis. Expression of germ-cell and pluripotency-specific proteins such as DDX4 (VASA) and POU5F1 (OCT3/4) were also present in spermatogonia. Interestingly, the expression of somatic cell-specific proteins such as VIMENTIN and GATA4 were also detected in germ cells. Using two-step enzymatic digestion followed by differential plating and Percoll density-gradient centrifugation, an approximately 55% spermatogonia-enriched cell population could be obtained from the prepubertal buffalo testis. Isolated spermatogonia could survive and proliferate in vitro in DMEM/F12 medium containing 10% fetal bovine serum in the absence of any specific growth factors for a week. Cultured spermatogonia showed DBA affinity and expressed DDX4 and POU5F1. These results may help to establish a long-term culture system for buffalo spermatogonia.
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