Frias B, Phillips AA, Squair JW, Lee AHX, Laher I, Krassioukov AV. Reduced colonic smooth muscle cholinergic responsiveness is associated with impaired bowel motility after chronic experimental high-level spinal cord injury.
Auton Neurosci 2018;
216:33-38. [PMID:
30196037 DOI:
10.1016/j.autneu.2018.08.005]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Revised: 08/29/2018] [Accepted: 08/31/2018] [Indexed: 02/07/2023]
Abstract
The mechanisms underlying bowel dysfunction after high-level spinal cord injury (SCI) are poorly understood. However, impaired supraspinal sympathetic and parasympathetic control is likely a major contributing factor. Disruption of the descending autonomic pathways traversing the spinal cord was achieved by a T3 complete spinal cord transection, and colonic function was examined in vivo and ex vivo four weeks post-injury. Total gastrointestinal transit time (TGTT) was reduced and contractility of the proximal and distal colon was impaired due to reduced M3 receptor sensitivity. These data describe a clinically relevant model of bowel dysfunction after SCI.
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