Why the study?
Does hyperglycemia or hypoglycemia impair HERG K+ channel function in HEK293 cells compared to normoglycemia?
Population
HEK293 cells expressing human ether-à-go-go-related gene (HERG) K(+) channel
Comparison
Hyperglycemia and hypoglycemia vs Normoglycemia (extracellular glucose 5 mM)
Design
Preclinical
Authors
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May explain QT prolongation in dysglycemia; hypothesis-generating and requires validation before clinical consideration.
Does hyperglycemia or hypoglycemia impair HERG K+ channel function in HEK293 cells compared to normoglycemia?
Both hyperglycemia and hypoglycemia impair HERG K+ channel function through ROS overproduction and ATP underproduction respectively, providing a mechanism for dysglycemia-induced QT prolongation.
Zhang et al. (2003) studied this question.
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