What question did this study set out to answer?

To determine the neuromuscular mechanisms driving ascending and descending reflexes in the circular and longitudinal smooth muscle layers of the murine distal colon.

August 6, 2015Canadian Journal of Physiology and PharmacologyOpen Access

Characterization of the peristaltic reflex in murine distal colon

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Authors

YZYong ZhangXuzhou Medical College WPWilliam G. PatersonUniversity of Massachusetts Lowell

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Implication

Physiological study reveals distinct ascending excitation and descending purinergic inhibition during the colonic peristaltic reflex in mice, highlighting dual neural pathways regulating gut motility.

Key Points

To determine the neuromuscular mechanisms driving ascending and descending reflexes in the circular and longitudinal smooth muscle layers of the murine distal colon.
Evaluated nerve stimulation- and balloon distention-mediated reflexes using intracellular electrophysiological recordings in murine distal colonic circular smooth muscle (CSM) and longitudinal smooth muscle (LSM).
Applied pharmacological blockers, including atropine and purinergic receptor antagonists (MRS-2500 and MRS-2179), to identify the neurotransmitter pathways involved.
Descending reflex pathways evoked inhibitory junction potentials in both CSM and LSM via purinergic signaling, which were blocked by MRS-2500 and MRS-2179.
Ascending reflex pathways varied by stimulus: balloon distention produced only atropine-sensitive cholinergic depolarization, whereas nerve stimulation triggered both purinergic inhibition and cholinergic excitation across muscle layers.

Cite This Study

Zhang et al. (2015) studied this question.

synapsesocial.com/papers/6a838744cfeb7a169036acfc https://doi.org/10.1139/cjpp-2015-0086

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Characterization of the peristaltic reflex in murine distal colon

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Implication

Key Points

Cite This Study

Characterization of the peristaltic reflex in murine distal colon

Discussion

Member takes

Implication

Key Points

Cite This Study

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