PTGS2 and endometriosis: In fact, previous endometriosis studies performed in the dorsal skinfold chamber model showed the regression of endometriotic lesions treated with rapamycin [45], NS398 (a cyclooxygenase-2 inhibitor) [46], epigallocatechin-3-gallate [47], quinalizarin (a CK2 inhibitor) [29] and telmisartan [31], although the anti-angiogenic efficacy of these compounds was partly lower when compared to 4-MU.