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Cryopreserved prepubertal testicular biopsies could theoretically be later matured\n                    <jats:italic>in vitro<\/jats:italic>\n                    to produce spermatozoa for assisted reproductive technology. A complete\n                    <jats:italic>in vitro<\/jats:italic>\n                    spermatogenesis has been obtained from mouse prepubertal testicular tissue, although with low efficiency. Steroid hormones are essential for the progression of spermatogenesis, the aim of this study was to investigate steroidogenesis and steroid signaling in organotypic cultures. Histological, RT-qPCR, western blot analyses, and steroid hormone measurements were performed on\n                    <jats:italic>in vitro<\/jats:italic>\n                    cultured mouse prepubertal testicular tissues and age-matched\n                    <jats:italic>in vivo<\/jats:italic>\n                    controls. Despite a conserved density of Leydig cells after 30 days of culture (D30), transcript levels of adult Leydig cells and steroidogenic markers were decreased. Increased amounts of progesterone and estradiol and reduced androstenedione levels were observed at D30, together with decreased transcript levels of steroid metabolizing genes and steroid target genes. hCG was insufficient to facilitate Leydig cell differentiation, restore steroidogenesis, and improve sperm yield. In conclusion, this study reports the failure of adult Leydig cell development and altered steroid production and signaling in tissue cultures. The organotypic culture system will need to be further improved before it can be translated into clinics for childhood cancer survivors.\n                  <\/jats:p>","DOI":"10.7554\/elife.85562","type":"journal-article","created":{"date-parts":[[2023,5,2]],"date-time":"2023-05-02T08:14:50Z","timestamp":1683015290000},"update-policy":"https:\/\/doi.org\/10.7554\/elife.85562","source":"Crossref","is-referenced-by-count":5,"title":["Steroidogenesis and androgen\/estrogen signaling pathways are altered in in vitro matured testicular tissues of prepubertal mice"],"prefix":"10.7554","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2412-4377","authenticated-orcid":true,"given":"Laura","family":"Moutard","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01k40cz91","id-type":"ROR","asserted-by":"publisher"}],"name":"Univ Rouen Normandie, Inserm, Normandie Univ, NorDiC UMR 1239, Adrenal and Gonadal Pathophysiology team, F-76000","place":["Rouen, 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