Protective Effect of &lt;i&gt;Apocynum venetum&lt;/i&gt; L. Leaves Extract Against Diabetic Cardiomyopathy: Inhibition of Oxidative Stress and Ferroptosis via Modulation of the Xc&lt;sup&gt;-&lt;/sup&gt;/GSH/GPX4 Axis. The gene discussed is GPX4; the disease is diabetic cardiomyopathy.