The nerve of ovulation-inducing factor in semen

Proceedings of the National Academy of Sciences of the United States of America
Marcelo H RattoGregg P Adams

Abstract

A component in seminal fluid elicits an ovulatory response and has been discovered in every species examined thus far. The existence of an ovulation-inducing factor (OIF) in seminal plasma has broad implications and evokes questions about identity, tissue sources, mechanism of action, role among species, and clinical relevance in infertility. Most of these questions remain unanswered. The goal of this study was to determine the identity of OIF in support of the hypothesis that it is a single distinct and widely conserved entity. Seminal plasma from llamas and bulls was used as representative of induced and spontaneous ovulators, respectively. A fraction isolated from llama seminal plasma by column chromatography was identified as OIF by eliciting luteinizing hormone (LH) release and ovulation in llamas. MALDI-TOF revealed a molecular mass of 13,221 Da, and 12-23 aa sequences of OIF had homology with human, porcine, bovine, and murine sequences of β nerve growth factor (β-NGF). X-ray diffraction data were used to solve the full sequence and structure of OIF as β-NGF. Neurite development and up-regulation of trkA in phaeochromocytoma (PC(12)) cells in vitro confirmed NGF-like properties of OIF. Western blot analysis of llama and ...Continue Reading

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Citations

Mar 22, 2013·Proceedings of the National Academy of Sciences of the United States of America·Antonino Cattaneo
Mar 22, 2013·Proceedings of the National Academy of Sciences of the United States of America·Nicholette Zeliadt
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Nov 14, 2019·Reproductive Biology and Endocrinology : RB&E·Cesare CastelliniMario Rende

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