title: ABT-898 induces tumor regression and prolongs survival in a mouse model of epithelial ovarian cancer.
abstract: Epithelial ovarian cancer (EOC) is the most lethal gynecologic malignancy and is often not diagnosed until late stages due to its asymptomatic nature. Women diagnosed with EOC typically undergo surgical debulking followed by chemotherapy; however, disease recurrence often occurs. In this study, we evaluated the ability of the thrombospondin-1 mimetic peptide, ABT-898, to regress established, late-stage tumors in a mouse model of human EOC. Ovarian tumors were induced and ABT-898 treatment was initiated at time points that were representative of late stages of the disease to study tumor regression. ABT-898 induced tumor regression and reduced the morbidity of treated animals compared with controls. Analysis of tumors from ABT-898-treated animals showed reduced abnormal tumor vasculature, decreased expression of the proangiogenic compound VEGF, and reduced tumor tissue hypoxia. ABT-898 treatment initiated at late-stage disease also significantly prolonged disease-free survival compared with control animals. Results from this study show that ABT-898 is capable of regressing established ovarian tumors in an animal model of the disease. As most women are detected at advanced stage EOC, ABT-898 may improve our treatment of ovarian cancer.
authors.affiliation: Department of Biomedical Sciences, University of Guelph, 50 Stone Rd, University of Guelph, Guelph, N1G 2W1 Canada.
authors.forename: Nicole
authors.initials: N
authors.lastname: Campbell
authors.forename: James
authors.initials: J
authors.lastname: Greenaway
authors.forename: Jack
authors.initials: J
authors.lastname: Henkin
authors.forename: Jim
authors.initials: J
authors.lastname: Petrik
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D000077216:Carcinoma, Ovarian Epithelial; D004195:Disease Models, Animal; D018572:Disease-Free Survival; D042783:Endothelial Cells / Q000187:drug effects; D004847:Epithelial Cells / Q000187:drug effects; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D051379:Mice; D008810:Mice, Inbred C57BL; D009375:Neoplasms, Glandular and Epithelial / Q000098:blood supply / Q000188:drug therapy* / Q000473:pathology; D009842:Oligopeptides / Q000494:pharmacology*; D010051:Ovarian Neoplasms / Q000098:blood supply / Q000188:drug therapy* / Q000473:pathology; D015996:Survival Rate
chemical_list: D009842:Oligopeptides; C554676:acetyl-glycyl-valyl-allo-isoleucyl-seryl-glutaminyl-isoleucyl-arginyl-prolyl-cysteinamide