I found this study. I think it may have been talked about on here recently but I wanted to post a link to the actually study.
Stimulation of TM3 Leydig cell proliferation via G...[Reprod Biol Endocrinol. 2004] - PubMed Result
Stimulation of TM3 Leydig cell proliferation via G...[Reprod Biol Endocrinol. 2004] - PubMed Result