RGD Reference Report - In search of rat stem Leydig cells: identification, isolation, and lineage-specific development. - Rat Genome Database

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In search of rat stem Leydig cells: identification, isolation, and lineage-specific development.

Authors: Ge, RS  Dong, Q  Sottas, CM  Papadopoulos, V  Zirkin, BR  Hardy, MP 
Citation: Ge RS, etal., Proc Natl Acad Sci U S A. 2006 Feb 21;103(8):2719-24. Epub 2006 Feb 8.
RGD ID: 4889544
Pubmed: (View Article at PubMed) PMID:16467141
DOI: Full-text: DOI:10.1073/pnas.0507692103

Leydig cells (LCs) are thought to differentiate from spindle-shaped precursor cells that exhibit some aspects of differentiated function, including 3beta-hydroxysteroid dehydrogenase (3betaHSD) activity. The precursor cells ultimately derive from undifferentiated stem LCs (SLCs), which are postulated to be present in testes before the onset of precursor cell differentiation. We searched for cells in the neonatal rat testis with the abilities to: (i) proliferate and expand indefinitely in vitro (self renew); (ii) differentiate (i.e., 3betaHSD and ultimately synthesize testosterone); and (iii) when transplanted into host rat testes, colonize the interstitium and subsequently differentiate in vivo. At 1 week postpartum, spindle-shaped cells were seen in the testicular interstitium that differed from the precursor cells in that they were 3betaHSD-negative, luteinizing hormone (LH) receptor (LHR)-negative, and platelet-derived growth factor receptor alpha (PDGFR alpha)-positive. These cells were purified from the testes of 1-week-old rats. The cells contained proteins known to be involved in LC development, including GATA4, c-kit receptor, and leukemia inhibitory factor receptor. The putative SLCs expanded over the course of 6 months while remaining undifferentiated. When treated in media that contained thyroid hormone, insulin-like growth factor I, and LH, 40% of the putative SLCs came to express 3betaHSD and to synthesize testosterone. When transplanted into host rat testes from which LCs had been eliminated, the putative SLCs colonized the interstitium and subsequently expressed 3betaHSD, demonstrating their ability to differentiate in vivo. We conclude that these cells are likely to be the sought-after SLCs.

Annotation

Gene Ontology Annotations    

Biological Process

Objects Annotated

Genes (Rattus norvegicus)
Hsd3b1  (hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 1)


Additional Information