Key result
Administration of insulin during reoxygenation protected isolated rat cardiomyocytes against hypercontracture development (cell length 76.3% vs 61.6% of end-hypoxic length; p<0.05).
Why the study?
Does insulin administration during reoxygenation reduce hypercontracture in isolated rat cardiomyocytes?
Population
Isolated rat cardiomyocytes subjected to hypoxia and reoxygenation (n=26)
Comparison
Insulin administered during reoxygenation vs Control (no insulin)
Design
Preclinical
Authors
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May support further animal validation; leaves open translation to clinical reperfusion injury.
Does insulin administration during reoxygenation reduce hypercontracture in isolated rat cardiomyocytes?
Absolute Event Rate: 76.3% vs 61.6%
p-value: p=<0.05
Insulin protects cardiomyocytes against reoxygenation-induced hypercontracture by accelerating cytosolic Ca2+ recovery via a PI 3-kinase, eNOS, and PKG survival pathway targeting SERCA.
Abdallah et al. (2006) studied Acute reperfusion injury (hypoxia and reoxygenation) (n=26). Insulin vs. Control was evaluated on Hypercontracture development (cell length as % of end-hypoxic length) (p=<0.05). Administration of insulin during reoxygenation protected isolated rat cardiomyocytes against hypercontracture development (cell length 76.3% vs 61.6% of end-hypoxic length; p<0.05).
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