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1 June 2016 IMMUNOLOCALIZATION OF INHIBIN/ACTIVIN SUBUNITS AND STEROIDOGENIC ENZYMES IN THE TESTES OF AN ADULT AFRICAN ELEPHANT (LOXODONTA AFRICANA)
Qinglin Li, Lu Lu, Qiang Weng, Shigehisa Kawakami, Eriko Saito, Tatsuya Yamamoto, Yuki Yamamoto, Saroch Kaewmanee, Kentaro Nagaoka, Gen Watanabe, Kazuyoshi Taya
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Abstract

In this case report, the authors investigated immunolocalization of inhibin α and inhibin/activin βA and βB subunits, as well as steroidogenic enzymes, in the testes of an African elephant. Testes were collected from a reproductively active male African elephant (24 yr old) at autopsy. Histologically, all types of spermatogenic cells including mature-phase spermatozoa were found in the seminiferous tubules. Positive immunostaining for inhibin α and inhibin/activin βA and βB subunits was observed in Sertoli and Leydig cells. In addition, P450scc, 3βHSD, P450c17, and P450arom were also detected in the cytoplasm of Leydig cells. These results suggested that Leydig cells of adult African elephant testes have the ability to synthesize progestin, androgen, and estrogen, whereas both Sertoli and Leydig cells appear as a major source of inhibin secretion in the male African elephant.

Copyright 2016 by American Association of Zoo Veterinarians
Qinglin Li, Lu Lu, Qiang Weng, Shigehisa Kawakami, Eriko Saito, Tatsuya Yamamoto, Yuki Yamamoto, Saroch Kaewmanee, Kentaro Nagaoka, Gen Watanabe, and Kazuyoshi Taya "IMMUNOLOCALIZATION OF INHIBIN/ACTIVIN SUBUNITS AND STEROIDOGENIC ENZYMES IN THE TESTES OF AN ADULT AFRICAN ELEPHANT (LOXODONTA AFRICANA)," Journal of Zoo and Wildlife Medicine 47(2), 419-422, (1 June 2016). https://doi.org/10.1638/2015-0091.1
Received: 15 April 2015; Published: 1 June 2016
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