Evaluation of serum M30 and M65 activity in patients with stage-I endometrial cancer.
We aimed to analyse the prognostic value of serum oxidative stress parameters and apoptotic markers of serum M30/65 levels in endometrial cancer patients. Serum M30/65 levels and oxidative stress parameters were evaluated in 52 women with stage I endometrial cancer (n = 26) and a control group of healthy females (n = 26). The total antioxidant status (p = .002), oxidative stress index (p = .003) and serum M30/65 levels (p < .001) were significantly higher in women with stage-I endometrial cancer in comparison to the control group. Furthermore, serum M30/65 levels were significantly lower on postoperative day 8, compared to preoperative levels (p = .001 and p < .001, respectively), in the endometrial cancer group. Although impaired apoptotic activity plays a crucial role in the aetiopathogenesis of endometrial cancer, oxidative stress may be instrumental in malignant transformation. We concluded that measurement of M30/65 levels would be beneficial in the follow-up of women with endometrial cancer. Impact Statement What is already known on this subject: Although M30 has been evaluated as a marker of apoptosis in tissue samples from women with endometrial cancer (EC), no previous studies have simultaneously analysed serum M30 and M65 levels and oxidative stress in patients with stage-I EC. What the results of this study add: Total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI) and serum M30/65 levels were significantly higher in women with stage I EC in comparison to the control group. Furthermore, serum M30/65 levels were significantly lower on postoperative day 8, compared to preoperative levels, in the EC group. The fact that pre-operative M30/M65 levels were higher than the post-operative levels may be very important in early-stage EC What the implications are of these findings for clinical practice and/or further research: Although impaired apoptotic activity plays a crucial role in the aetiopathogenesis of EC, oxidative stress may be instrumental in malignant transformation. The fact that serum M30/M65 levels decreased in accordance with the reduction of post-operative tumour burden led us to conclude that measurement of M30/65 levels would be beneficial in the follow-up of women with EC.