Is Chlamydia-infected tubal fimbria the origin of ovarian cancer?
Ovarian cancer is a highly lethal disease and its underlying biology is poorly understood. Prophylactic salpingo-oophorectomies in BRCA + women have recently implicated the fimbria as a site of origin for high-grade serous carcinoma and its intraepithelial precursors. This suggests that at least some ovarian cancers, probably the most aggressive ones, may not originate in the ovary itself, but rather may arise in the uterine tubes. Chronic inflammation is associated with carcinogenesis in several tissues, including liver, esophagogastric junction (cardia), and the uterine cervix. The mechanisms underlying the relationship between inflammation and cancer are complex and involve common pathways, in addition to DNA damage. A critical source of uterine tube inflammation is infection with Chlamydia trachomatis. We hypothesize that C.trachomatis infection may be involved in chronic tubal inflammation and subsequent fimbrial carcinogenesis. Fimbrial intraepithelial precursors can evolve into high grade serous carcinomas that spread rapidly to the ovarian surface and peritoneum; such tumors may appear to be primary ovarian neoplasia, though in reality being a secondary malignancy. This hypothesis must be further investigated to understand the intracellular signaling pathways involved in Chlamydia infection and its healing, and their relationship to carcinogenesis in order to discover potential therapeutic molecular targets. If our hypothesis were confirmed, salpingectomy instead of ovariectomy may also become the recommended surgery for high risk women.
Carvalho
Jesus Paula
JP
Department of Gynecology, Faculdade de Medicina da Universidade de Sāo Paulo, Brazil. jpcarvalho@usp.br
Carvalho
Filomena Marino
FM
D002689:Chlamydia / Q000378:metabolism*; D002690:Chlamydia Infections / Q000150:complications*; D004848:Epithelium / Q000382:microbiology / Q000473:pathology; D005187:Fallopian Tubes / Q000382:microbiology / Q000473:pathology; D005260:Female; D006801:Humans; D007249:Inflammation; D008954:Models, Biological; D008962:Models, Theoretical; D010051:Ovarian Neoplasms / Q000382:microbiology* / Q000473:pathology