Intracellular application of a saturating cAMP concentration induced an additional rightward shift of ∼7 mV in HCN4F cells, which did not reach statistical significance (p = 0.055), whereas WT cells exhibited a significant ∼10 mV shift.
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HCN4 gain-of-function mutation increases intrinsic heart rate and limits maladaptive remodeling under pressure overload.
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0.0550
0.0550