• Zhonghua yi xue za zhi · Nov 2007

    [Effects and mechanism of colonic electrical stimulation with trains of short-pulses on colonic transit: experiment with rats].

    • Wen-Bo Li, Shi Liu, Xiao-Hua Hou, and Chen Jdz.
    • Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
    • Zhonghua Yi Xue Za Zhi. 2007 Nov 27;87(44):3155-7.

    ObjectiveTo evaluate the effects and mechanism of colonic electrical stimulation (CES) on colonic transit.Methods76 male SD rats were equipped with colonic electrodes for stimulation and a catheter in the colon and then randomly divided onto 6 groups: normal saline-(NS)/CES group (14 rats), NS-non-CES group (14 rats), N-nitro-L-arginine (L-NNA)/CES group (12 rats), L-NNA/non-CES group (12 rats), atropine/CES group (12 rats), and atropine/non-CES group (12 rats). All rats underwent intraperitoneal injection of NS, L-NNA, nitric oxide synthesis blocker, or atropine before colon transit. Colonic transit was assessed by calculating the output of phenol red from the anus every 10 min for 90 min CES with trains of short-pulses was performed during the first 40 min of the transit test in the 3 CES groups.Results(1) CES significantly enhanced the colonic transit. The colonic emptying rate 90 min after the injection of phenol red of the NS/CES group was 82% +/- 5%, significantly higher than that of the NS/non-CES group (57% +/- 6%, P = 0.002) with a 43% increase. (2) L-NNA delayed the colonic transit and prevented the accelerative effect of CES on colonic transit. (3) The phenol red emptying rate 90 min after the injection of the atropine/non-CES group was 16% +/- 3%, significantly lower than that of the NS/non-CES group (P < 0.001). The phenol red emptying rate 90 min after the injection of the atropine/CES group was 41% +/- 6%, significantly higher than that of the atropine/non-CES group (16% +/- 3%, P = 0.01).ConclusionCES has an excitatory effect on colonic transit and this excitatory effect may be mediated via the nitrergic pathway, not the cholinergic pathway.

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…