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Screening for biomarkers of spermatogonia within the human testis: a whole genome approach.

Abstract : BACKGROUND: A key step in studying the biology of spermatogonia is to determine their global gene expression profile. However, disassociation of these cells from the testis may alter their profile to a considerable degree. To characterize the molecular phenotype of human spermatogonia, including spermatogonial stem cells (SSCs), within their cognate microenvironment, a rare subtype of human defective spermatogenesis was exploited in which spermatogonia were the only germ cell type. METHODS: The global expression profile of these samples was assessed on the Affymetrix microarray platform and compared with tissues showing homogeneous Sertoli-cell-only appearance; selected genes were validated by quantitative real-time PCR and immunohistochemistry on disparate sample sets. RESULTS: Highly significant differences in gene expression levels correlated with the appearance of spermatogonia, including 239 best candidates of human spermatogonially expressed genes. Specifically, fibroblast growth factor receptor 3 (FGFR3), desmoglein 2 (DSG2), E3 ubiquitin ligase c-CBL (casitas B-cell lymphoma), cancer/testis antigen NY-ESO-1 (CTAG1A/B), undifferentiated embryonic cell transcription factor 1 (UTF1) and synaptosomal-associated protein, 91 kDa homolog (SNAP91) were shown to represent specific biomarkers of human spermatogonia. CONCLUSIONS: These biomarkers, specifically the surface markers FGFR3 and DSG2, may facilitate the isolation and enrichment of human stem and/or progenitor spermatogonia and thus lay a foundation for studies of long-term maintenance of human SSCs/progenitor cells, spermatogonial self-renewal, clonal expansion and differentiation.
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Submitted on : Thursday, September 16, 2010 - 5:12:57 PM
Last modification on : Wednesday, March 30, 2022 - 2:34:46 PM

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Kathrein von Kopylow, Christiane Kirchhoff, Davor Jezek, Wolfgang Schulze, Caroline Feig, et al.. Screening for biomarkers of spermatogonia within the human testis: a whole genome approach.. Human Reproduction, Oxford University Press (OUP), 2010, 25 (5), pp.1104-12. ⟨10.1093/humrep/deq053⟩. ⟨inserm-00518201⟩



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