Tmsb10 triggers fetal Leydig differentiation by suppressing the RAS/ERK pathway.

Miki Inoue, Takashi Baba, Fumiya Takahashi, Miho Terao, Shogo Yanai, Yuichi Shima, Daisuke Saito, Kei Sugihara, Takashi Miura, Shuji Takada, Mikita Suyama, Yasuyuki Ohkawa, Ken-Ichirou Morohashi

Communications biology 2022 Sep 15

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Leydig cells in fetal testes play crucial roles in masculinizing fetuses through androgen production. Gene knockout studies have revealed that growth factors are implicated in fetal Leydig cell (FLC) differentiation, but little is known about the mechanisms regulating this process. We investigate this issue by characterizing FLC progenitor cells using single-cell RNA sequencing. The sequence datasets suggest that thymosin β10 (Tmsb10) is transiently upregulated in the progenitors. While studying the function of Tmsb10, we reveal that platelet-derived growth factor (PDGF) regulates ciliogenesis through the RAS/ERK and PI3K/AKT pathways, and thereby promotes desert hedgehog (DHH)-dependent FLC differentiation. Tmsb10 expressed in the progenitor cells induces their differentiation into FLCs by suppressing the RAS/ERK pathway. Through characterizing the transiently expressed Tmsb10 in the FLC progenitors, this study unveils the molecular process of FLC differentiation and shows that it is cooperatively induced by DHH and PDGF. © 2022. The Author(s).

Citation

Miki Inoue, Takashi Baba, Fumiya Takahashi, Miho Terao, Shogo Yanai, Yuichi Shima, Daisuke Saito, Kei Sugihara, Takashi Miura, Shuji Takada, Mikita Suyama, Yasuyuki Ohkawa, Ken-Ichirou Morohashi. Tmsb10 triggers fetal Leydig differentiation by suppressing the RAS/ERK pathway. Communications biology. 2022 Sep 15;5(1):974