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The classical progesterone receptor mediates the rapid reduction of fallopian tube ciliary beat frequency by progesterone.

Journal article
Authors Anna Bylander
Karin Lind
Mattias Goksör
Håkan Billig
D. G. Joakim Larsson
Published in Reproductive biology and endocrinology : RB&E
Volume 11
Issue 1
Pages 33
ISSN 1477-7827
Publication year 2013
Published at Institute of Neuroscience and Physiology
Department of Physics (GU)
Institute of Biomedicine, Department of Infectious Medicine
Pages 33
Language en
Links dx.doi.org/10.1186/1477-7827-11-33
https://gup.ub.gu.se/file/101089
Keywords Progesterone, Fallopian tube, Ciliated cell, Rapid response, Nuclear progesterone receptor
Subject categories Basic Medicine

Abstract

BACKGROUND: The transport of gametes as well as the zygote is facilitated by motile cilia lining the inside of the fallopian tube. Progesterone reduces the ciliary beat frequency within 30 minutes in both cows and mice. This rapid reduction suggest the involvement of a non-genomic signaling mechanism, although it is not known which receptors that are involved. Here we investigated the possible involvement of the classical progesterone receptor in this process. METHOD: The ciliary beat frequency of mice fallopian tube was measured ex vivo using an inverted bright field microscope and a high speed camera. The effects of the agonists progesterone and promegestone and an antagonist, mifeprestone, were investigated in wildtype mice. The effect of progesterone was also investigated in mice lacking the classical progesterone receptor. RESULTS: Progesterone, as well as the more specific PR agonist promegestone, significantly reduced the CBF at concentrations of 10--100 nanomolar within 10--30 minutes. In the absence of progesterone, the PR antagonist mifeprestone had no effect on the ciliary beat frequency at a concentration of 1 micromolar. When ciliated cells were pre-incubated with 1 micromolar mifeprestone, addition of progesterone did not reduce the ciliary beat frequency. Accordingly, in ciliated cells from mice not expressing the classical progesterone receptor, exposure to 100 nanomolar progesterone did not reduce the ciliary beat frequency. CONCLUSIONS: This is the first study to provide comprehensive evidence that the classical progesterone receptor mediates the rapid reduction of the tubal ciliary beat frequency by progesterone.

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