Abstract

Spermatogonial stem cells (SSCs) produce haploid sperm via mitosis and meiosis in vivo. Although the technique to culture mouse SSCs has been well established, induction of meiosis in vitro has remained a challenge. Retinoic acid (RA) is required for meiosis in vivo; however, RA alone is not sufficient to induce meiosis in vitro. Here, we describe a method in which nutrient restriction and RA synergistically induce meiotic initiation into meiotic prophase I in cultured mouse SSCs.

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