Why the study?
Clinical studies have linked TRPM4 mutations to cardiac disorders, but its exact roles in the heart remain unclear.
Does Trpm4 knockdown alter cardiac electrophysiology and hemodynamics in mice?
Population
Male and female Trpm4 knockdown and wild-type mice aged 5- to 12-weeks-old or 24-week-old or more
Comparison
Trpm4 knockdown (Trpm4 -/-) mice vs wild-type mice
Design
Preclinical animal study
Key result
In adult male mice, Trpm4 knockdown significantly reduced heart rate and increased heart rate variability, while the TRPM4 inhibitor NBA triggered third-degree atrioventricular block in 40% of wild-type hearts.
Authors
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May identify TRPM4 as therapeutic target in conduction disorders; animal data leave clinical translation open.
Does Trpm4 knockdown alter cardiac electrophysiology and hemodynamics in mice?
TRPM4 plays a crucial role in cardiac structure and electrical function, with its knockdown inducing sex- and age-dependent alterations in heart rate and ventricular function in mice.
Arullampalam et al. (2022) studied Cardiac electrophysiology and hemodynamics. Trpm4 knockdown and NBA inhibitor vs. Wild-type mice and vehicle was evaluated on Cardiac electrophysiology and hemodynamics (heart rate, heart rate variability, and atrioventricular conduction). In adult male mice, Trpm4 knockdown significantly reduced heart rate and increased heart rate variability, while the TRPM4 inhibitor NBA triggered third-degree atrioventricular block in 40% of wild-type hearts.
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