Depolarization-Stimulated Contractility of Gastrointestinal Smooth Muscle in Calcium-Free Solution: A Review
2011
Gastrointestinal Smooth Muscle Contractions in Calcium-Free Solutions
publication
Evidence: moderate
Author Information
Author(s): Evans Emily D., Mangel Allen W.
Primary Institution: RTI-Health Solutions
Hypothesis
Can depolarization trigger contractions in gastrointestinal smooth muscle even in the absence of calcium?
Conclusion
Gastrointestinal smooth muscle can generate contractions through depolarization even when calcium is absent.
Supporting Evidence
- Gastrointestinal smooth muscles typically do not contract in calcium-free solutions.
- Depolarization can trigger contractions in muscle segments even without calcium.
- Prolonged potentials and rhythmic mechanical activity were observed in calcium-free environments.
Takeaway
This study shows that even without calcium, certain gut muscles can still contract if they are stimulated correctly.
Methodology
The review discusses various studies on the electrical and mechanical activity of gastrointestinal smooth muscle in calcium-free solutions.
Limitations
The study does not explain why contractions are not observed in smaller muscle segments or single cells.
Digital Object Identifier (DOI)
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