Biochemistry of Arachidonic Acid Metabolism

Biochemistry of Arachidonic Acid Metabolism
Author :
Publisher : Springer Science & Business Media
Total Pages : 468
Release :
ISBN-10 : 0898387175
ISBN-13 : 9780898387179
Rating : 4/5 (75 Downloads)

Book Synopsis Biochemistry of Arachidonic Acid Metabolism by : William E.M. Lands

Download or read book Biochemistry of Arachidonic Acid Metabolism written by William E.M. Lands and published by Springer Science & Business Media. This book was released on 1985-04-30 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prostaglandins, Leukotrienes, and Cancer is a multi-volume series that will focus on an emerging area of cancer research. In 1968, R.H. Williams first reported that elevated prostaglandin levels are present in human medullary car­ cinoma. Since that time, the concept that arachidonic acid metabolites may be in­ volved in cancer has expanded to include every aspect of the disease from cell transformation through metastasis. Prostaglandins and leukotrienes are generic terms used to describe a family of bioactive lipids produced from unsaturated fatty acids (principally from arachidonic acid) via the cyclooxygenase and lipoxygenase pathways, respec­ tively. Cyclooxygenase products consist of diverse products such as prosta­ glandin E, (POE,), prostacyclin (POI2) and thromboxane A2 (TXA2), whereas lipoxygenase products consist of hydroperoxy fatty acids and mono-, di- and tri-hydroxy acids including leukotrienes. The precursor fatty acids for the cyclooxygenase and lip oxygenase pathways are present in cellular phospholipids. This finding established an important control point in their biosynthesis-the release of substrate. This occurs in response to numerous stimuli that act at the cell surface. Dr. Bengt Samuelsson's extensive study of the metabolism of pros­ taglandins indicated that they are rapidly inactivated on a single pass through pulmonary circulation. Thus, they cannot act as circulating hormones and appear to be made on demand in or in the vicinity of target tissues leading to the concept that prostaglandins are local hormones or autocoids.


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