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Diversity of Selenium Functions in Health and Disease |
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Features
•Describes mechanisms of the toxicity of certain selenium compounds and their potential use in cancer therapy
•Highlights basic mechanisms and structural features of selenium compounds that are critical in chemoprevention
•Discusses selenoproteins with dual functions in cancer and the conditions under which function predominates
•Examines the unexpected functions of selenoproteins in health and diseases including side effects and non-anticipated functions
•Explores polymorphisms, mutations or deletions in selenoproteins, and/or proteins required for selenoprotein biosynthesis responsible for different responses to selenium intake
Summary
Named after Selene, Greek goddess of the moon, selenium (Se) has moved has moved from being thought of as a toxicant to being considered an essential nutrient with the potential to reduce cancer risk in the span of seven decades. Diversity of Selenium Functions in Health and Disease focuses on current knowledge of aspects of Se research relevant to its medical use, and particularly to chemoprevention of cancer. It covers how Se is integrated into selenoproteins, selenium compounds with individual functions and dual functions, and unexpected links to Se such as with diabetes. The text ends with a discussion of polymorphisms and mutations in genes of selenoproteins.
The chapters elucidate why studies undertaken to prevent diseases with selenium ended with disappointing outcomes and often with the opposite result, i.e. disease promotion. They show that benefit, failure, or side effects depend on:
•The chemical form and dose of selenium
•The selenium status of the individual ingesting selenium
•The capacity of selenium form to serve as a source for selenoprotein biosynthesis
•The function of selenoproteins reacting to a change in the selenium status
•The stage of the disease (mainly cancer) at the time point of intervention
•The genetic background of individuals to be treated
Bringing together the accumulated evidence regarding selenium biochemistry, the book covers aspects not found in available general monographs. The narrow focus on medical uses of Se helps resolve the present confusion about potential benefits and hazards of selenium in human health. The book gives you a solid scientific basis for optimum use of selenium in preventing or treating human diseases and answering the questions: Why is selenium essential? How much is required? What are the health consequences of low selenium and can selenium reduce cancer risk?
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INTRODUCTION
Who Can Benefit from Selenium?
Gerald F. Combs, Jr
SE COMPOUNDS AS A SOURCE FOR SELENOPROTEIN BIOSYNTHESIS
Selenium Metabolism
Yasumitsu Ogra
The Molecular Regulation of Selenocysteine Incorporation into Proteins in Eukaryotes
Aditi Dubey and Paul R. Copeland
Selenocysteine tRNA[Ser]Sec: The Central Component of Selenoprotein Biosynthesis
Bradley A. Carlson, Ryuta Tobe, Petra A. Tsuji, Min- Hyuk Yoo, Lionel Feigenbaum, Lino Tessarollo, Byeong J. Lee, Ulrich Schweizer, Vadim N. Gladyshev, and Dolph L. Hatfield
SE COMPOUNDS WITH SPECIFIC FUNCTIONS
Redox Cycling and the Toxicity of Selenium Compounds: A Historical View
Julian E. Spallholz
Selenite in Cancer Therapy
Sougat Misra, Marita Wallenberg, Ola Brodin, and Mikael Björnstedt
Forms of Selenium in Cancer Prevention
Karam El-Bayoumy, Raghu Sinha, and John P. Richie, Jr
DUAL FUNCTIONS OF SELENOPROTEINS IN CANCER
Thioredoxin Reductase
Bradley A. Carlson
Glutathione Peroxidase
Anna P. Kipp and Mike F. Müller
The 15-kDa Selenoprotein (Sep15)
Petra A. Tsuji and Cindy D. Davis
UNEXPECTED LINKS
Multifaceted and Intriguing Effects of Selenium and Selenoproteins on Glucose Metabolism and Diabetes
Ji-Chang Zhou, Holger Steinbrenner, Margaret P. Rayman, and Xin Gen Lei
Selenoproteins and the Metabolic Syndrome
Lucia A. Seale, Ann Marie Zavacki, and Marla J. Berry
Thioredoxin Reductase: A Coordinator in Metabolic Activities
Sofi Eriksson and Edward E. Schmidt
Selenium Mediates a Switch in Macrophage Polarization
K. Sandeep Prabhu, Avinash K. Kudva, and Shakira M. Nelson
SELENOPROTEIN POLYMORPHISMS AND MUTATIONS
Genetic Polymorphisms in Selenoprotein Genes: Functionality and Disease Risk
Catherine Méplan, Janaina Lombello Santos Donadio, and John Hesketh
Mutations in SECISBP
Erik Schoenmakers, Carla Moran, Nadia Schoenmakers, and Krishna Chatterjee |
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