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Calcium-activated chloride channels anoctamin 1 and 2 promote murine uterine smooth muscle contractility. | LitMetric

Calcium-activated chloride channels anoctamin 1 and 2 promote murine uterine smooth muscle contractility.

Am J Obstet Gynecol

Department of Anesthesiology, Columbia University College of Physicians and Surgeons, Columbia University Medical Center, New York, NY. Electronic address:

Published: December 2014

AI Article Synopsis

Article Abstract

Objective: To determine the presence of calcium activated chloride channels anoctamin 1 (ANO1) and 2 (ANO2) in human and murine uterine smooth muscle (MUSM) and evaluate the physiologic role for these ion channels in murine myometrial contractility.

Study Design: We performed reverse transcription polymerase chain reaction to determine whether ANO1 and 2 are expressed in human and murine uterine tissue to validate the study of this protein in mouse models. Immunohistochemical staining of ANO1 and 2 was then performed to determine protein expression in murine myometrial tissue. The function of ANO1 and 2 in murine uterine tissue was evaluated using electrophysiologic studies, organ bath, and calcium flux experiments.

Results: ANO1 and 2 are expressed in human and MUSM cells. Functional studies show that selective antagonism of these channels promotes relaxation of spontaneous MUSM contractions. Blockade of ANO1 and 2 inhibits both agonist-induced and spontaneous transient inward currents and abolishes G-protein coupled receptor (oxytocin) mediated elevations in intracellular calcium.

Conclusion: The calcium activated chloride channels ANO1 and 2 are present in human and murine myometrial tissue and may provide novel potential therapeutic targets to achieve effective tocolysis.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4253652PMC
http://dx.doi.org/10.1016/j.ajog.2014.06.018DOI Listing

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