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• W2768729693 abstract "Abstract Epithelial ovarian cancer (EOC) is the most lethal gynecologic malignancy, but it still lacks effective treatment options. In this study, we utilized proteomic technology to identify lipolysis-stimulated lipoprotein receptor (LSR) as a new tumor antigen of EOC. Immunohistochemical analysis of EOC tissues in conjunction with survival analysis of EOC patients showed that high expression of LSR is associated with poor prognosis. High LSR expression also occurred in tumor metastases including to the lymph node and omentum. To evaluate the possible benefits of blocking this antigen in EOC, we raised a new monoclonal antibody (mAb) to human LSR (hLSR). In mouse xenograft models of hLSR+ EOC (cell lines or patient-derived tumors), we found that administration of anti-hLSR mAb inhibited tumor growth in a manner independent of both antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity. Mechanistic investigations showed that hLSR expression increased incorporation of very-low-density lipoprotein (VLDL) into EOC cells and that anti-hLSR mAb inhibited lipid uptake in vitro and in vivo. Moreover, VLDL promoted cell proliferation in hLSR-positive EOC cells in vitro, and this effect was inhibited by anti-hLSR mAb. While the anti-hLSR mAb studied cross reacted with the mouse antigen, we observed no adverse effects on normal organs and lipid metabolism in murine hosts. Our findings suggest that hLSR plays a key functional role in EOC development and that this antigen can be therapeutically targeted by specific mAb to improve EOC treatment. Significance: These findings offer preclinical evidence of the therapeutic efficacy of a novel targeted antibody therapy against deadly epithelial ovarian cancers. Cancer Res; 78(2); 516–27. ©2017 AACR." @default.
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• W2768729693 date "2018-01-15" @default.
• W2768729693 modified "2023-10-06" @default.
• W2768729693 title "LSR Antibody Therapy Inhibits Ovarian Epithelial Tumor Growth by Inhibiting Lipid Uptake" @default.
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• W2768729693 doi "https://doi.org/10.1158/0008-5472.can-17-0910" @default.
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