Heart elasticity may hinge on a hidden genetic switch

Article excerpt

Researchers have identified RBM20, a protein that acts as a molecular gatekeeper controlling how heart cells produce different versions of messenger RNA from the same genes, a process called alternative splicing. This genetic switch appears critical for the heart's ability to adapt to changing demands, with RBM20 regulating which proteins get made and in what quantities. The discovery suggests that variations in this single protein could explain differences in heart elasticity and resilience across individuals, potentially opening new avenues for understanding why some hearts fail while others remain robust under stress.