Human spermatogonial stem cells and their niche in male (in)fertility: novel concepts from single-cell RNA-sequencing
- PMID: 36409992
- PMCID: PMC9825264
- DOI: 10.1093/humrep/deac245
Human spermatogonial stem cells and their niche in male (in)fertility: novel concepts from single-cell RNA-sequencing
Abstract
The amount of single-cell RNA-sequencing (scRNA-seq) data produced in the field of human male reproduction has steadily increased. Transcriptional profiles of thousands of testicular cells have been generated covering the human neonatal, prepubertal, pubertal and adult period as well as different types of male infertility; the latter include non-obstructive azoospermia, cryptozoospermia, Klinefelter syndrome and azoospermia factor deletions. In this review, we provide an overview of transcriptional changes in different testicular subpopulations during postnatal development and in cases of male infertility. Moreover, we review novel concepts regarding the existence of spermatogonial and somatic cell subtypes as well as their crosstalk and provide corresponding marker genes to facilitate their identification. We discuss the potential clinical implications of scRNA-seq findings, the need for spatial information and the necessity to corroborate findings by exploring other levels of regulation, including at the epigenetic or protein level.
Keywords: AZF deletion; Klinefelter; Leydig cells; Sertoli cells; azoospermia; human testis development; male infertility; single-cell RNA-sequencing; spermatogenesis; spermatogonial stem cells.
© The Author(s) 2022. Published by Oxford University Press on behalf of European Society of Human Reproduction and Embryology.
Figures
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