MMP9 and cardiomyopathy: It attenuates diabetic encephalopathy by mitigating neuroinflammation and oxidative stress, protects against retinopathy by inhibiting MMP-9 and preserving retinal function, alleviates cardiomyopathy by reducing fibrosis and oxidative damage, prevents hepatopathy/NAFLD via metabolic reprogramming, and ameliorates nephropathy by suppressing inflammation and fibrosis.