Cardiac hypertrophy induced by overexpression of IP3-released inositol 1, 4, 5-trisphosphate receptor-binding protein (IRBIT)

Our study describes for the first time that IRBIT plays a critical role in the pathophysiology of the heart. Our findings demonstrate that IRBIT overexpression disrupts Ca²⁺ signaling, contributing to hypertrophic remodeling and impaired cardiac function. The altered wave propagation, the increase in DI and the decrease of the rate of the Ca²⁺ transient suggests that IRBIT influences Ca²⁺ - induced Ca²⁺ release. This study provides the first evidence linking IRBIT to pathological cardiac remodeling and Ca²⁺ handling dysregulation. Although significant progress has been made, further research is required to better understand the cardiovascular function of IRBIT and its mechanisms.