Abstract
Lysophosphatidic acid (LPA) is a bioactive lipid component of ovarian cancer activating factor, which is present at a high concentration in the ascitic fluid and plasma of patients with ovarian cancer. A group of six lysophosphatidic acid receptors (LPARs), LPAR1 through LPAR6, which belong to the G protein-coupled receptor superfamily (GPCR), mediate cellular activities of LPA and activates a series of downstream molecules and cellular responses, including biological and pathological effects. LPARs are widely expressed in normal ovary, benign tumor, and ovarian cancer tissues and cancer cell lines with a broad range of levels. The LPA/LPAR axis is involved in tumorigenesis and development of ovarian cancer through mediating the cellular responses to LPA and influencing the expression and function of oncogenic molecules. In the present review, the roles of LPARs in ovarian cancer, including the expression, function, and downstream molecules, are summarized, and we discuss the implications for ovarian cancer treatment that targets LPARs.
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