| Title: | Absorption and distribution of estradiol from male seminal emissions during mating |
| Author(s): | deCatanzaro D; Pollock T; |
| Address: | "Department of PsychologyNeuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada decatanz@mcmaster.ca. Department of PsychologyNeuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada" |
| ISSN/ISBN: | 1479-6805 (Electronic) 0022-0795 (Print) 0022-0795 (Linking) |
| Abstract: | "Estradiol-17beta (E(2)) plays critical roles in female maturation, sexual receptivity, ovulation and fertility. In many mammals, contact with males can similarly affect these female parameters, whereas male excretions contain significant quantities of E(2) We administered radiolabeled estradiol ([(3)H]E(2)) to male mice in doses representing a small fraction of their endogenous E(2) These males were paired with sexually receptive females, and radioactivity was traced into the females' systems. In Experiment 1, males were given [(3)H]E(2) at 24 and 1 h before mating. Male-to-female [(3)H]E(2) transfer intensified with increasing numbers of intromissions and spiked in the uterus after insemination. In Experiment 2, sexually experienced young males received [(3)H]E(2) at 72 and 24 h before mating, and all mated to ejaculation. The copulatory plug deposited in the female reproductive tract contained substantial levels of radioactivity. The uteri, other tissues and blood serum of females displayed radioactivity indicative of E(2) transfer. In Experiment 3, radioactivity was observed 3 and 18 h after insemination in the females' uteri and other tissues, including parts of the brain. In Experiment 4, we observed substantial levels of radioactivity in semen as well as the copulatory plugs retrieved from the females after mating. Transferred E(2) could directly affect abundant estrogen receptors in the female reproductive tract without potential metabolism by the liver. Sexually transferred E(2) may facilitate uterine preparation for blastocyst implantation. These data converge with several lines of evidence indicating that male-sourced E(2) can transfer to proximate females in bioactive form, contributing to various mammalian pheromonal effects" |
| Keywords: | "Animals Estradiol/administration & dosage/*metabolism/pharmacokinetics Female Male Mice Pheromones/metabolism Reproduction/physiology Semen/*metabolism Sexual Behavior, Animal/*physiology Tissue Distribution Tritium Uterus/metabolism behaviour estrogen fe;" |
| Notes: | "MedlinedeCatanzaro, Denys Pollock, Tyler eng England 2016/11/03 J Endocrinol. 2016 Dec; 231(3):245-257. doi: 10.1530/JOE-16-0247. Epub 2016 Oct 6" |
