Key result
Loss of Rgs5 in mice provoked exaggerated bradycardia and prolonged sinus nodal recovery time (P<0.05), whereas Rgs5 overexpression conferred resistance to acetylcholine-related bradycardia and AT.
Why the study?
Does Rgs5 regulate vagal-related bradycardia and atrial tachyarrhythmia through IKA ch current in mice?
Population
Rgs5 knockout mice, wild-type mice, and transgenic mice with cardiac-specific overexpression of human Rgs5
Comparison
Carbachol or acetylcholine administration vs Wild-type (WT) mice
Design
Preclinical
Authors
Loading...
Rgs5 modulation may affect vagal responses in mice; hypothesis-generating for human arrhythmias, requires clinical validation.
Does Rgs5 regulate vagal-related bradycardia and atrial tachyarrhythmia through IKA ch current in mice?
p-value: p=<0.05
Rgs5 acts as a critical regulator of parasympathetic activation in the heart, preventing vagal-related bradycardia and atrial tachyarrhythmia by negatively regulating the IKA ch current.
Qin et al. (2016) studied Vagal-related bradycardia and atrial tachyarrhythmia. Rgs5 knockout and Rgs5 overexpression vs. Wild-type mice was evaluated on Sinus nodal recovery time, atrial effective refractory periods, and IKA ch current (p=<0.05). Loss of Rgs5 in mice provoked exaggerated bradycardia and prolonged sinus nodal recovery time (P<0.05), whereas Rgs5 overexpression conferred resistance to acetylcholine-related bradycardia and AT.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: