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Spermatogonial stem cells (SSCs) are the foundation of spermatogenesis, during which unlimited spermatozoa is produced daily derived from SSCs in the testis throughout life of the male. Germline stem (GS) cells can be isolated from spermatogonia, which shared the characteristics of SSCs and embryonic stem cells (ESCs), and can be passaged stably in vitro. The study of GS cells contributes to understanding spermatogenesis process. However, little is known about the GS cells in domestic animals. Here, we report the successful establishment of a serum- and feeder-free system for multipotent male GS cells (mGSCs) from postnatal porcine testis. These cells expressed pluripotent markers, such as Oct4, Nanog, C-myc, and germline-specific markers including Vasa, CD90, CD49f, Gfrα1, Plzf and Dazl. Then we assayed the developmental potential of these cells in vitro. The porcine multipotent male germline stem cells (pmGSCs) can form embryoid bodies (EBs) by suspension culture. Immunofluorescence analysis showed that the EBs differentiated into neuron-specific enolase (NSE, ectoderm), α-actin (mesoderm), and Pdx1 (endoderm) positive cells. These cells induced by 10-6 M retinoic acid (RA) could be differentiated into spermatid-like cells which were positive for Acrosin. The pmGSCs has been cultured over 14 passages. Thus, we have established a long-term culture system for pmGSCs. This culture system provides a platform for the study of porcine mGSCs

Multipotent male germline stem cells (mGSCs) from neonate porcine testis