Abstract
Prostaglandins (PG) are members of a large group of hormonally active fatty acids derived from free fatty acids. They are formed from arachidonic acid—the major PG precursor. Cyclooxygenase (COX)-1 and -2 are the rate-limiting steps in PG synthesis. COX-2 is overexpressed in many human non-endocrine and endocrine tumors including colon, breast, prostate, brain, thyroid, and pituitary. COX-2 has an important role in angiogenesis and tumor growth. Thromboxane synthase (TS) catalyzes the synthesis of thromboxane A2 (TXA2), which is derived from arachidonic acid and prostaglandin H2 and is a vasoconstrictor and inducer of platelet aggregation. TXA2 stimulates tumor growth and spread of some tumors and TS appears to have a critical role in tumorigenesis in some organ systems.
In this review, we examine the role of COX-2 and TS in various non-endocrine tumors, especially colon, breast, prostate, and brain as well as in endocrine tumors. The accumulating evidence points to an increasingly important role of COX-2 and TS in tumor progression and metastasis.
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Onguru, O., Casey, M.B., Kajita, S. et al. Cyclooxygenase-2 and thromboxane synthase in non-endocrine and endocrine tumors: A review. Endocr Pathol 16, 253–277 (2005). https://doi.org/10.1385/EP:16:4:253
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DOI: https://doi.org/10.1385/EP:16:4:253