OBJECTIVE: To evaluate whether endometriosis could be related to an impaired balance between apoptosis and proliferation, two processes which could be modulated by hormonal status. DESIGN: Immunohistochemical study. SETTING: Academic research laboratory. INTERVENTION(S): Endometriotic samples obtained from peritoneum of women aged 26-40 years who were undergoing laparoscopy for pain or infertility. MAIN OUTCOME MEASURE(S): Apoptotic cells were detected with the use of the terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay. The production of p53 and bcl-2, estrogen and Progesterone (P) receptors, and cellular proliferation were assessed by immunohistochemistry in eutopic and ectopic endometria from 30 patients with endometriosis throughout the menstrual cycle. Results were compared with those from normal endometria from 15 fertile patients. RESULT(S): Endometriotic lesions were characterized by reduced TUNEL and p53 stainings and by enhanced bcl-2 staining. No correlation between apoptosis and estrogen receptor or P receptor levels was found. A lower amount of steroid receptor was found in endometriotic tissues, without cyclic modulation, compared with the eutopic endometrium. CONCLUSION(S): Our results suggest that when endometrial tissue is located at ectopic locations, it differs from eutopic endometrium by its proliferation rate, steroid hormone levels, and markers of apoptosis. A reduced sensitivity of endometriotic cells to apoptosis could promote the dissemination and implantation of these cells to ectopic sites.
OBJECTIVE: To evaluate whether endometriosis could be related to an impaired balance between apoptosis and proliferation, two processes which could be modulated by hormonal status. DESIGN: Immunohistochemical study. SETTING: Academic research laboratory. INTERVENTION(S): Endometriotic samples obtained from peritoneum of women aged 26-40 years who were undergoing laparoscopy for pain or infertility. MAIN OUTCOME MEASURE(S): Apoptotic cells were detected with the use of the terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay. The production of p53 and bcl-2, estrogen and Progesterone (P) receptors, and cellular proliferation were assessed by immunohistochemistry in eutopic and ectopic endometria from 30 patients with endometriosis throughout the menstrual cycle. Results were compared with those from normal endometria from 15 fertile patients. RESULT(S): Endometriotic lesions were characterized by reduced TUNEL and p53 stainings and by enhanced bcl-2 staining. No correlation between apoptosis and estrogen receptor or P receptor levels was found. A lower amount of steroid receptor was found in endometriotic tissues, without cyclic modulation, compared with the eutopic endometrium. CONCLUSION(S): Our results suggest that when endometrial tissue is located at ectopic locations, it differs from eutopic endometrium by its proliferation rate, steroid hormone levels, and markers of apoptosis. A reduced sensitivity of endometriotic cells to apoptosis could promote the dissemination and implantation of these cells to ectopic sites.
Authors: Mary Ellen Pavone; Matthew Dyson; Scott Reirstad; Elizabeth Pearson; Hiroshi Ishikawa; You Hong Cheng; Serdar E Bulun Journal: Hum Reprod Date: 2011-06-08 Impact factor: 6.918
Authors: Mary Ellen Pavone; Scott Reierstad; Hui Sun; Magdy Milad; Serdar E Bulun; You-Hong Cheng Journal: J Clin Endocrinol Metab Date: 2010-08-11 Impact factor: 5.958
Authors: Jeong Namkung; Jae Yen Song; Hyun Hee Jo; Mee Ran Kim; Young Oak Lew; Patricia K Donahoe; David T MacLaughlin; Jang Heub Kim Journal: J Clin Endocrinol Metab Date: 2012-07-03 Impact factor: 5.958
Authors: Ali Salmassi; Bengi Acar-Perk; Andreas G Schmutzler; Kerstin Koch; Frank Püngel; Walter Jonat; Liselotte Mettler Journal: Bioimpacts Date: 2011-08-06