Send to

Choose Destination
J Clin Endocrinol Metab. 2014 Oct;99(10):3766-73. doi: 10.1210/jc.2014-1690. Epub 2014 Jun 17.

Testicular synthesis and vitamin D action.

Author information

Department of Internal Medicine, Division of Endocrinology and Metabolism (D.H., J.M., V.S., M.U., T.R.P., B.O.-P.), Department of Urology (K.H., R.Z.), and Department of Surgery, Division of Transplantation Surgery (P.S., H.M.), Medical University of Graz, 8036 Graz, Austria.



The vitamin D system has pleiotropic effects not only in bone metabolism. Its role in testicular steroidogenesis is new and deserves intensive research.


We hypothesize that vitamin D, especially 1,25 dihydroxyvitamin D3 [1,25(OH)2D3 (calcitriol)] induces male steroidogenesis and intend to identify its impact on genes and pathways in testicular androgen regulation.


Human adult primary testicular cells were isolated, treated with 1,25(OH)2D3, and their gene expression levels profiled by microarray analysis. Highly regulated genes were confirmed by real-time quantitative PCR. In addition, the effects of 1,25(OH)2D3 in combination with LH and IGF-I on the gene expression level of androgens were assessed. T levels in the culture media were determined by a high-resolution ELISA. The expression of vitamin D receptor was confirmed at baseline and after 1,25(OH)2D3 stimulation using immunocytochemistry.


Microarrays depicted 63 genes significantly regulated by 1,25(OH)2D3, including genes related to male androgen and vitamin D metabolism, mainly triggered by the vitamin D receptor/retinoid X receptor activation. 1,25(OH)2D3 led to significant changes in the expression profiles of reproductive genes and significantly increased T synthesis in human testicular cell cultures.


Data from our human primary testicular cell culture model suggest that vitamin D plays a major role in male steroidogenesis in vitro.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Silverchair Information Systems
Loading ...
Support Center