| Role of distension on duodenal and colonic contractility in mice: a novel myograph for intestines. | |
| | |
MedLine Citation:
|
PMID: 22309442 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Background The role of mechanical distension (stretch and tension) on intestinal contractility is poorly understood. Methods We introduce a novel isovolumic myograph to quantify the intestinal contractility in response to mechanical stimulation. To evaluate the role of distension on contractility, an external restraint was used to restrict intestinal distension or stretch induced by inflation pressure. The amplitude of intraluminal pressure at isovolumic condition was defined as an index of intestinal contractility. Key Results The in situ maximal contraction (1.42 ± 0.39 mmHg) of duodenum in response to inflation pressure was similar to the in vitro maximal contraction (1.39 ± 0.37 mmHg). As the pressure was increased, the in situ duodenal contraction attenuated faster than the in vitro one. The in situ maximal contraction (4.86 ± 1.32 mmHg) of distal colon in response to inflation pressure was significantly larger than the in vitro maximal contraction (2.31 ± 0.67 mmHg). With increase of pressure, the in situ colonic contractility (1.82 ± 0.87 mmHg) became similar to the in vitro counterpart (1.61 ± 0.98 mmHg). With restraint, the maximal contraction of duodenum and distal colon decreased from 4.86 ± 1.32 and 1.42 ± 0.39 mmHg to 2.91 ± 0.87 and 0.97 ± 0.29 mmHg, respectively. Finally, a significant linear relation was found between strain and amplitude of contraction for both duodenum and colon which became non-significant with restraint. Conclusions & Inferences Our results suggest that distension is an important stimulus for intestinal contractility and nervous regulation is implicated in the intestinal contractility response to mechanical stimulus. |
| | |
Authors:
|
X Lu; Z Zhang; J S Choy; G S Kassab |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-2-6 |
Journal Detail:
|
Title: Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society Volume: - ISSN: 1365-2982 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
|
Created Date: 2012-2-7 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9432572 Medline TA: Neurogastroenterol Motil Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
© 2012 Blackwell Publishing Ltd. |
Affiliation:
|
Department of Biomedical Engineering, IUPUI, Indianapolis, IN, USA Cellular and Integrative Physiology, IUPUI, Indianapolis, IN, USA Surgery, IUPUI, Indianapolis, IN, USA Indiana Center for Vascular Biology and Medicine, IUPUI, Indianapolis, IN, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The Total Synthesis and Structural Revision of Stagonolide D.
Next Document: Comparison of the performance of DBA/2 and C57BL/6 mice in transitive inference and foreground and b...