Next, to further explore the function of PPARG and CD5L in tumor endothelial cells, we injected murine ID8 ovarian cancer cells into the peritoneal cavity of C57BL/6 mice containing an endothelial cell–specific PPARG knockout or into C57BL/6 WT mice (Fig. 4A)9. The gene discussed is PPARG; the disease is ovarian cancer.