Download or read book Prostaglandins in Cancer Research written by Enrico Garaci and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arachidonic acid metabolites are known to playa regulatory role in a number of biological systems, in which they function as microenviron mental hormones and intracellular signal mediators. One of the most exciting areas of research of these compounds is the one that studies the relationship between prostaglandins and tumor cell growth and function. In the last few years there has been an extraordinary evolution of data on prostaglandins (and related compounds) and cancer. This vol ume is based on papers presented at the 1986 International Confer ence on Prostaglandins and Cancer organized by the Italian National Research Council and the II University of Rome, and held in Rome, Italy, in June, 1986. This Conference brought together oncologists and specialists in the areas of prostaglandin chemistry, biochemistry, pharmacology, physiology, cellular and molecular biology to overview the actual state of knowledge on the role of eicosanoids in cancer and to focus on the key questions that need to be answered. The picture that comes out of this book describes a very complicated network of interactions between arachidonic acid metabolites and different as pects of the complex phenomenon "cancer". Eicosanoids participate in carcinogenesis initiation and promotion, and their relationship with tumor promoters and growth factors is well established. During cancer growth, different prostaglandins can have different roles in the regulation of cell proliferation and differentiation and in metastasis formation; meanwhile evidence is accumulating for a pos sible use of some of these compounds as antineoplastic agents.

Download or read book Prostaglandins and Immunity written by James S. Goodwin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 230 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 E2 (PGE2), prostacyclin (PGI2) 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 lipoxygenase 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.

Download or read book Eicosanoids and Radiation written by Peter Polgar and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 198 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 Ez (PGEz), prostacyclin (PGIz) and thromboxane Az (TXAz), 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 lipoxygenase 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.

Download or read book Prostaglandin Inhibitors in Tumor Immunology and Immunotherapy written by Jules E. Harris and published by CRC Press. This book was released on 1994-03-28 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an updated overview of eicosanoid metabolism. It also presents a timely discussion of eicosanoid metabolism in the process of tumor cell metastasis, in chemoprotection and radioprotection associated with cancer therapy, and in cell differentiation. The book focuses on the role of eicosanoids in the immunology of malignant disease. This includes how various immune cell populations in cancer are affected by the secretion and action of various eicosanoids and metabolites of eicosanoids and how these processes may be affected by various pharmacological manipulations and interventions to augment anti-tumor immunity. Head and neck cancer is covered in great detail to illustrate a cancer in humans where these considerations are particularly relevant. This important volume demonstrates that the principal factor in cancer patient immunologic deficiency is related to excess secretion by monocytes of prostaglandins.

Download or read book Carcinogenesis and Dietary Fat written by S. Abraham and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prostaglandins, Leukotrienes, and Cancer is a multi-volume series which focuses on an emerging area of cancer research. In 1968, R.H. Williams first reported that elevated prostaglandin levels are present in human medullary carcinoma. Since that time, the concept that arachidonic acid metabolites may be involved 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 ofbioactive lipids produced from unsaturated fatty acids (principally from arachidonic acid) via the cyclooxygenase and lipoxygenase pathways, respectively. Cyclooxygenase products consist of diverse products such as prostaglandin E2 (PGE2), prostacyclin (PGI2) and thromboxane A2 (TXA2), whereas lipoxygenase products consist ofhydroperoxy fatty acids and mono-, di-and tri-hydroxy acids including leukotrienes, lipoxins, and epoxides. The precursor fatty acids for the cyclooxygenase and lipoxygenase 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 ofthe metabolism of prostaglandins indicate 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 the vicinity oftarget tissues leading to the concept that prostaglandins are local rrormones or autocoids. Altered production, qualitative and/or quantitative, of prostaglandins and leukotrienes has been implicated in the development of a number of disease states (e. g.

Download or read book Prostaglandins and Cancer written by First International Conference on Prostaglandins and published by . This book was released on 1982-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Prostaglandin and Thromboxane Research written by Bengt Samuelsson and published by . This book was released on 1991 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cancer and the prostaglandins written by John L. Ziegler and published by . This book was released on 1982 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biochemical Aspects of Prostaglandins and Thromboxanes written by Norman Kharasch and published by Elsevier. This book was released on 2012-12-02 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochemical Aspects of Prostaglandins and Thromboxanes covers the proceedings of the 1976 Intra-Science Research Foundation Symposium on New Biochemistry of Prostaglandins and Thromboxanes, held in Santa Monica, California. This 14-chapter book deals first with the biosynthesis of prostaglandins and thromboxanes with bovine vesicular gland and in transformed fibroblasts. These topics are followed by discussions on the pharmacologic properties and the role of prostaglandins as mediators of the inflammatory response. The next chapters describe the structure-activity relations and the pharmacologic activities of the prostaglandin series, with an emphasis on their role in cancer, obstetrics, and gynecology. The remaining chapters examine the role of prostaglandin endoperoxides and thromboxanes as bioregulators. This book will be of value to biochemists and pharmacologists.

Download or read book Advances in Prostaglandin Leukotriene and other Bioactive Lipid Research written by Zeliha Yazici and published by Springer Science & Business Media. This book was released on 2003-04-30 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, the Proceedings of the 12th International Conference on Advances in Prostaglandin, Leukotriene and Other Bioactive Lipid Research: Basic Science and Clinical Applications, held August 25-29, 2002, in Istanbul, Turkey, discusses advances in bioactive lipid research with special attention to cancer, cardiovascular diseases, gastrointestinal diseases and respiratory diseases. Specific topics covered include the role of leukotrienes and lipoxins in inflammation, the cytochrome P450 pathway, the genetics and genomics of bioactive lipids, lipid peroxidation, apoptosis, angiogenesis, isoprostanes, receptors and inhibitors, cyclooxygenase and lipoxygenase pathways and inhibitors, prostaglandin synthases and receptor signaling, phospholipases and inhibitors.

Download or read book Practical Applications of Prostaglandins and their Synthesis Inhibitors written by Sultan M.M. Karim and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the fourth in a series of books on Advances in Prostaglandin Research published by MTP Press. From laboratory and animal studies a large number of practical applications of prostaglandins have been identified. In some areas clinical trials have also been carried out. There is usually a long time interval between identifying practical applications of new drugs and clinical trials. Most of the information on practical applications of prostaglandins is scattered in different journals. Although a number of books dealing with prostaglandin research have been published (including some on practical applications in specific areas, e.g. reproduction) there is no single volume dealing with all areas of practical applications of these substances. This book aims at filling this gap and should be of interest to clinicians as well as to medical and basic scientists in academic institutions and in the pharmaceutical industry. In some areas, exciting potential applications of prostaglandins have been identified from basic research but clinical trials have so far not been carried out. Such areas of practical applications are covered in a separate intro ductory chapter. All contributors to the volume are scientists and clinicians actively engaged in prostaglandin research and most are recognized authorities in specific areas. The need for rapid publication in a fast-expanding field is obvious.

Download or read book Arachidonic Acid Metabolism and Tumor Promotion written by Susan M. Fischer and published by Springer. This book was released on 1985-04-30 with total page 282 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 and lipoxygenase pathways, respec­ arachidonic acid) via the cyclooxygenase tively. Cyclooxygenase products consist of diverse products such as prosta­ glandin E2 (POE), prostacyclin (POI) and thromboxane A2 (TXA), whereas 2 2 2 lipoxygenase products consist of hydroperoxy fatty acids and mono-, di- and tri-hydroxy acids including leukotrienes. The precursor fatty acids for the cyclooxygenase and lipoxygenase 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.

Download or read book A Potential Therapeutic Role of J Series Prostaglandins in PPARy Mediated Treatment of Breast Cancer written by and published by . This book was released on 2002 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The peroxisome proliferator activated receptor gamma (PPAR gamma), is a potential therapeutic target for the treatment of breast cancer but the endogenous ligand for PPAR gamma is not yet known. Recent data suggest that the endogenous ligand of PPAR gamma may be a bioactive metabolite of arachidonic acid that is synthesized in normal breast tissue. Activation of PPAR gamma with different agonists (e.g. l5deoxy delta l2,l4PGJ2, troglitazone) elicits different physiological responses in breast cancer cells (i.e. differentiation or apoptosis) raising questions of the role PPARy plays in normal breast cell physiology. Results from our initial experiments show that prostaglandin metabolites of arachidonic acid inhibit cell cycle progression of MDA-MB-231 breast cancer cells. This cell cycle block induces apoptosis of breast cancer cells and inhibits tumor formation in nude mice. We hypothesize that human breast cancer cell lines (and human breast cancer tumors) have aberrant PPAR gamma mediated signal transduction pathways or contain disrupted pathways for the metabolism of fatty acid derivatives that act as PPAR gamma agonists. Understanding the metabolism of fatty acids in breast cancer cells, and elucidating the molecular and signal transduction events that are mediated by PPARy agonists may lead to novel strategies for the prevention and treatment of breast cancer.

Download or read book Arachidonic Acid Metabolism and Tumor Initiation written by Lawrence J. Marnett and published by Springer. This book was released on 2011-10-04 with total page 200 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 E2 (POE ), prostacyclin (POI ) and thromboxane A2 (TXA ), whereas 2 2 2 lipoxygenase products consist of hydroperoxy fatty acids and mono-, di- and tri-hydroxy acids including leukotrienes. The precursor fatty acids for the cyclooxygenase and lipoxygenase 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. Bengl 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.

Download or read book Prostaglandins Leukotrienes and Cancer written by and published by . This book was released on 19?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Potential Therapeutic Role of J Series Prostaglandins in PPAR gamma Mediated Treatment of Breast Cancer written by and published by . This book was released on 2003 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Naturally occurring derivatives of arachidonic acid metabolism are potent and effective activators of PPAR-gamma. The most potent of these derivatives is 15deoxy-delta(12,14)PGJ2 (15dPGJ2), the dehydration and isomerization product of prostaglandin D2 (PGD2). 15dPGJ2 induces PPAR-gamma mediated transcriptional activation leading to the synthesis of critical gene products involved in cell cycle arrest and apoptosis. of these gene products, expression of the cyclin dependent kinase inhibitors, p21 and p27, is associated with marked cell cycle arrest with subsequent apoptosis involving caspase-3. However, apoptosis induced by 15dPGJ2 is unlikely to be PPAR-gamma mediated as demonstrated by studies with dominant negative forms of this receptor. To further elucidate how AA derivatives such as 15dPGJ2 induce apoptosis in breast cancer cells investigations into AA metabolic pathways were undertaken. We demonstrate that intracellular accumulation of AA induces apoptosis in cancer cells by activating the AP-1 family of nuclear transcription factors. Given the anti-cancer efficacy of therapies which alter AA metabolism, such as NSAIDs, further investigation into 15dPGJ2 and other facets of the AA metabolic pathway are warranted.

Download or read book Prostaglandin E2 Pathway as a Target to Prevent and Treat Ovarian Cancer in Laying Hens written by Erfan Eilati and published by . This book was released on 2014 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chronic inflammation has been linked to cancer. Prostaglandin E2 (PGE2) is the most pro-inflammatory lipid and one of the downstream products of 2 isoforms of cyclooxygenase (COX) enzymes: COX-1 and COX-2. Although both COX isoforms have similar structure and function, they are encoded by different genes and show distinct expression patterns. COX-1 is expressed in most cells and tissues and remains constant under most physiologic conditions to play a housekeeping role whereas the COX-2 form is inducible and usually only expressed in response to various inflammatory stimuli. COX enzymes may be involved in both tumor establishment and maintenance of existing tumors. PGE 2 exerts its effects on target cells by coupling to four subtypes of receptors which have been classified as EP1-4. Ovarian cancer is the most lethal gynecological malignancy and mainly occurs in older women. Prevention may be the best approach to reduce ovarian cancer. Ovarian cancer is the fifth leading cause of cancer death among women and the most lethal gynecological malignancy. There are at least 3 well established risk factors for ovarian cancer: age, family history and environmental factors. Ovarian cancer is mainly seen in older women when their ovaries are not reproductively functional. Close to half of the women with ovarian cancer (48%) are in the age group of 65 or older. Epidemiological and preclinical studies indicate that increased dietary intake of omega-3 fatty acids (OM-3FAs) reduces the incidence and growth of various cancers. Thus, increasing the consumption of OM-3FAs may be a nontoxic way to prevent or suppress ovarian cancer. Flaxseed is the richest vegetable source of omega-3 fatty acids which may be effective in the prevention of ovarian cancer. Fish oil is a source of OM-3FAs which may be effective in prevention of ovarian cancer. The main OM-6FA, Linoleic Acid (LA), is a direct precursor of the Arachidonic Acid (AA). Alpha-linolenic acid (ALA) is the main OM-3FA found in flax oil, whereas eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are the OM-3FAs in fish oil. ALA is elongated to form EPA and DHA in the intestine. Celecoxib is a non-steroidal anti-inflammatory (NSAID) drug that selectively inhibits COX-2. There are evidences showing that Celecoxib has some anti-cancer properties. Progress in the treatment and prevention of ovarian cancer has been hampered due to the lack of an appropriate animal model and absence of effective chemo-prevention strategies. The domestic hens spontaneously develop ovarian adenocarcinomas that share similar histological appearance and symptoms such as ascites and metastasis with humans. Our findings suggest that the lower levels of COX-2 and PGE2 are the main contributing factors in the chemo-suppressive role of long-term flaxseed consumption in ovarian cancer in laying hens. These findings may provide the basis for clinical trials of dietary intervention targeting prostaglandin biosynthesis for the prevention and treatment of ovarian cancer. To our knowledge the present study provides the first insight into the efficacy of fish oil, flax oil, Celecoxib, alone or combined on the reduction of COX enzyme expression, PGE2 concentration and apoptosis in the normal and cancerous ovaries and further demonstrates the utility of the hen model for ovarian cancer. Our studies provided new insight into the potential mechanism of action of flaxseed, fish oil, flax oil and Celecoxib in the reduction of ovarian cancer and will establish the foundation for clinical trials to test the efficacy of dietary intervention for the prevention and suppression of ovarian cancer in women. (Abstract shortened by UMI.)