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Ultrasound induces contraction of the bladder smooth muscle.

Abstract：

PURPOSE:To investigate whether the treatment of overt postpartum urinary retention (PUR) with low-intensity pulsed ultrasound (LIPUS) was clinically effective and whether LIPUS could accelerate bladder smooth muscle (BSM) contraction by opening the L-type calcium channels and activating the Ca(2+) signaling pathway. METHODS:Records of 136 patients undergoing PUR were retrospectively reviewed in two different groups for LIPUS and neostigmine between from 2014 to July 2015. The rats BSM strips in vitro were irradiated by LIPUS. The contraction frequency and amplitude were recorded with BL-410F biological experimental system. The BSM cells were constructed and identified by α-actin-specific antibody staining, and the intracellular Ca(2+) concentration was analyzed by flow cytometry. RESULTS:The clinical trial indicated that LIPUS had potential therapeutic effect on PUR (80.6 vs. 64.1 %, p < 0.05), and the BSM strip contractility was increased by LIPUS (p < 0.001), and the concentration of Ca(2+) was markedly enhanced by about twofold than that without LIPUS exposure (p < 0.01). Besides, nimodipine could suppress the contraction of BSM and the concentration of intracellular Ca(2+) which was caused by ultrasound. CONCLUSIONS:The results suggested LIPUS had potential therapeutic effect on PUR and the Ca(2+) signaling pathway was involved in the mechanism. The ultrasound irradiation may provide a new method for PUR therapy.

journal_name

Int Urol Nephrol

journal_title

International urology and nephrology

authors

Ren Y,Zhu Y,Liu L,Yu T,Dong X

doi

10.1007/s11255-016-1298-8

subject

Has Abstract

pub_date

2016-08-01 00:00:00

pages

1229-1236

issue

8

eissn

0301-1623

issn

1573-2584

pii

10.1007/s11255-016-1298-8

journal_volume

48

pub_type

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