alexa Cyclooxygenases, prostanoids, and tumor progression.


Journal of Cancer Science & Therapy

Author(s): Wang MT, Honn KV, Nie D

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Abstract In response to various growth factors, hormones or cytokines, arachidonic acid can be mobilized from phospholipids pools and converted to bioactive eicosanoids through cyclooxygenase (COX), lipoxygenase (LOX) or P-450 epoxygenase pathway. The COX pathway generates five major prostanoids (prostaglandin D(2), prostaglandin E(2), prostaglandin F(2)alpha, prostaglandin I(2) and thromboxane A(2)) that play important roles in diverse biological processes. Studies suggest that different prostanoids and their own synthase can play distinct roles in tumor progression and cancer metastasis. COX-2 and PGE(2) synthase have been most well documented in the regulation of various aspects of tumor progression and metastasis. PGE(2), for example, can stimulate angiogenesis or other signaling pathways by binding to its receptors termed EPs. Therefore, targeting downstream prostanoids may provide a new avenue to impede tumor progression. In this review, aberrant expression and functions of several prostanoid synthetic enzymes in cancer will be discussed. The possible regulation of tumor progression by prostaglandins and their receptors will also be discussed. This article was published in Cancer Metastasis Rev and referenced in Journal of Cancer Science & Therapy

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