Gastric motility in ghrelin receptor knockout mice

  • Authors:
    • Cheng-Guang Yang
    • Wei-Gang Wang
    • Jun Yan
    • Jian Fei
    • Zhi-Gang Wang
    • Qi Zheng
  • View Affiliations

  • Published online on: October 29, 2012     https://doi.org/10.3892/mmr.2012.1157
  • Pages: 83-88
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Abstract

The aim of this study was to investigate the effects and possible mechanisms of ghrelin receptor (GHS-R) deficiency on gastric motility in GHS-R deficient (Ghsr-/-) mice. Ghsr-/- and control (Ghsr+/+) mice were genotyped by PCR. The percentage of gastric emptying (GE%) was calculated following the intraperitoneal adminis­tration of ghrelin. In vitro, the contractile response of smooth muscle strips to ghrelin and electrical field stimulation (EFS) and the intraluminal pressure change of isolated stomach to carbachol were observed in an organ bath. The staining of nerve cells in the gastric muscle layer was performed by immunofluorescence. Delayed gastric emptying was observed in the Ghsr-/- mice; ghrelin enhanced the GE% in the Ghsr+/+ mice but had no effect on the GE% in the Ghsr-/- mice. In vitro, the response of the strips to ghrelin and EFS and the intraluminal pressure change to cabarchol was reduced in the Ghsr-/- mice. GHS-Rs were predominantly expressed on nerve cells in gastric muscle layers. The number of nerve cells was observed to be decreased in the Ghsr-/- mice. The delayed gastric emptying may relate to the loss of GHS-Rs and the reduction in the number of nerve cells in the gastric muscle layers of the GHS-R-deficient mice.
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January 2013
Volume 7 Issue 1

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Yang C, Wang W, Yan J, Fei J, Wang Z and Zheng Q: Gastric motility in ghrelin receptor knockout mice. Mol Med Rep 7: 83-88, 2013
APA
Yang, C., Wang, W., Yan, J., Fei, J., Wang, Z., & Zheng, Q. (2013). Gastric motility in ghrelin receptor knockout mice. Molecular Medicine Reports, 7, 83-88. https://doi.org/10.3892/mmr.2012.1157
MLA
Yang, C., Wang, W., Yan, J., Fei, J., Wang, Z., Zheng, Q."Gastric motility in ghrelin receptor knockout mice". Molecular Medicine Reports 7.1 (2013): 83-88.
Chicago
Yang, C., Wang, W., Yan, J., Fei, J., Wang, Z., Zheng, Q."Gastric motility in ghrelin receptor knockout mice". Molecular Medicine Reports 7, no. 1 (2013): 83-88. https://doi.org/10.3892/mmr.2012.1157