Why the study?
Does chronic hypoxia alter the contribution of K+ currents to resting potential and tone in rat pulmonary artery smooth muscle?
Population
Rats exposed to chronic hypoxia and age-matched controls (pulmonary artery smooth muscle)
Comparison
1 mM 4-aminopyridine (4-AP) vs Age-matched control rats
Design
Preclinical
Authors
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May alter pulmonary vasodilator targeting under hypoxia; leaves open translation beyond rat models.
Does chronic hypoxia alter the contribution of K+ currents to resting potential and tone in rat pulmonary artery smooth muscle?
Chronic hypoxia shifts the major K+ current determining resting potential in pulmonary arteries from IK(N) to IK(V), which has implications for pulmonary vasodilator drug specificity.
Osipenko et al. (1998) studied this question.
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