Previously claimed male germline stem cells from porcine testis are actually progenitor Leydig cells

文献类型： 外文期刊

第一作者： Bai, Yinshan

作者： Bai, Yinshan;Feng, Meiying;Wei, Hengxi;Li, Li;Zhao, Zhihong;Zhang, Xianwei;Wu, Zhenfang;Zhang, Shouquan;Bai, Yinshan;Zhu, Cui;Tian, Xiuchun;Liu, Shanshan;Ma, Ningfang;Shi, Ruyi;Fu, Chao

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关键词： Male germline stem cells; Progenitor Leydig cells; Testicular cells; Gene expression; Pig

期刊名称：STEM CELL RESEARCH & THERAPY （ 影响因子：6.832； 五年影响因子：7.153 ）

ISSN： 1757-6512

年卷期： 2018 年 9 卷

页码：

收录情况： SCI

摘要： Background: Male germline stem cells (mGSCs) offer great promise in regenerative medicine and animal breeding due to their capacity to maintain self-renewal and to transmit genetic information to the next generation following spermatogenesis. Human testis-derived embryonic stem cell-like cells have been shown to possess potential of mesenchymal progenitors, but there remains confusion about the characteristics and origin of porcine testis-derived stem cells. Methods: Porcine testis-derived stem cells were obtained from primary testicular cultures of 5-day old piglets, and selectively expanded using culture conditions for long-term culture and induction differentiation. The stem cell properties of porcine testis-derived stem cells were subsequently assessed by determining the expression of pluripotency-associated markers, alkaline phosphatase (AP) activity, and capacity for sperm and multilineage differentiation in vitro. The gene expression profile was compared via microarray analysis. Results: We identified two different types of testis-derived stem cells (termed as C1 and C2 here) during porcine testicular cell culture. The gene expression microarray analysis showed that the transcriptome profile of C1 and C2 differed significantly from each other. The C1 appeared to be morphologically similar to the previously described mouse mGSCs, expressed pluripotency-and germ cell-associated markers, maintained the paternal imprinted pattern of H19, displayed alkaline phosphatase activity, and could differentiate into sperm. Together, these data suggest that C1 represent the porcine mGSC population. Conversely, the C2 appeared similar to the previously described porcine mGSCs with three-dimensional morphology, abundantly expressed Leydig cell lineage and mesenchymal cell-specific markers, and could differentiate into testosterone-producing Leydig cells, suggesting that they are progenitor Leydig cells (PLCs). Conclusion: Collectively, we have established the expected characteristics and markers of authentic porcine mGSCs (C1). We found for the first time that, the C2, equivalent to previously claimed porcine mGSCs, are actually progenitor Leydig cells (PLCs). These findings provide new insights into the discrepancies among previous reports and future identification and analyses of testis-derived stem cells.

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