Abstract
In an earlier study, we observed a significant decrease in apoptosis in varicose veins, as compared with healthy veins, indicating that deregulated apoptosis plays a role in the pathogenesis of varicosities. In addition, significant differences were noted in the expression and subcellular localization of the cell cycle regulatory protein, cyclin D1 in varix tissues, as compared with controls. Because cell cycle checkpoint controls are linked to the signaling and execution of apoptotic cascades, we examined the expression of bcl-2 family members bax and bcl-x, known molecular mediators of apoptosis, and that of poly (ADP-ribose) polymerase (PARP), a downstream substrate of DNA cleavage. Twenty varicose vein specimens were retrieved from 20 patients (10 men, 10 women; mean age, 53.6 +/- 4.7 years) undergoing lower-extremity varicose vein excision. Healthy greater saphenous vein segments (n = 27) were obtained from 27 patients (14 men, 13 women; mean age, 59.5 +/- 2.4 years) undergoing infrainguinal arterial bypass grafting surgery. All tissues were distal portions. As per CEAP classification for chronic lower-extremity venous disease, most of the patients were in class 2 for clinical signs (n = 11); some patients were in class 3 ...Continue Reading
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