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Old 04-15-2019, 05:10 AM
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rss Defective spermatogenesis and testosterone levels in kinase suppressor of Ras1 (KSR1)

Defective spermatogenesis and testosterone levels in kinase suppressor of Ras1 (KSR1)-deficient mice.

Reprod Fertil Dev. 2019 Apr 15;:

Authors: Moretti E, Collodel G, Belmonte G, Noto D, Giurisato E


Abstract
The aim of this study was to clarify the role of the protein kinase suppressor of Ras1 (KSR1) in spermatogenesis. Spermatogenesis in ksr1-/- mice was studied in testicular tissue and epididymal spermatozoa by light and transmission electron microscopy and by immunofluorescence using antibodies to ghrelin and 3?-hydroxysteroid dehydrogenase (3?-HSD). Blood testosterone levels were also assessed. ksr1-/- mice showed reduced epididymal sperm concentration and motility as compared with wild-type (wt) mice. Testis tissue from ksr1-/- mice revealed a prevalent spermatogenetic arrest at the spermatocyte stage; the interstitial tissue was hypertrophic and the cytoplasm of the Leydig cells was full of lipid droplets. Ghrelin signal was present in the seminiferous tubules and, particularly, in the interstitial tissue of wt mice; however, in ksr1-/- mice ghrelin expression was very weak in both the interstitial tissue and tubules. On the contrary, the signal of 3?-HSD was weak in the interstitial tissue of wt and strong in ksr1-/- mice. Testosterone levels were significantly increased in the blood of ksr1-/- mice (P
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