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As discussed in this book, a large body of evidence indicates that selenium is a cancer chemopreventive agent. Further evidence points to a role of this element in reducing viral expression, in preventing heart disease, and other cardiovascular and muscle disorders, and in delaying the progression of AIDS in HIV infected patients. Selenium may also have a role in mammalian development, in male fertility, in immune function and in slowing the aging process. The mechanism by which selenium exerts its beneficial effects on health may be through selenium-containing proteins. Selenium is incorporated into protein as the amino acid selenocysteine. Selenocysteine utilizes a specific tRNA, a specific elongation factor, a specific set of signals, and the codeword, UGA, for its cotranslational insertion into protein. It is indeed the 21st naturally occurring amino acid to be incorporated into protein and marks the first and only expansion of the genetic code since the code was deciphered in the mid 1960s.
Selenium has a long history of association with human health and disease. This essential trace element exerts its important biological role in selenoproteins. "Selenoproteins and Mimics" presents the latest developments in selenoproteins, their functional imitation by biomimetic chemistry and biology, and their relationship with human health and diseases. This book provides both the basic biology and biochemistry knowledge of selenoproteins, and sophisticated approaches for the development of new selenoprotein mimics. It's a valuable reference for researchers in biological technology, chemical syntheses, and medicine design. Junqiu Liu is a professor at the State Key Lab of Supramolecular Structure and Materials, Jilin University, China. Guimin Luo is a professor at the Key Lab of Molecular Enzymology and Engineering of the Ministry of Education, Jilin University, China.Ying Mu is a professor at the State Key Lab of Industrial Control Technology, Zhejiang University, and guest professor at the Key Lab of Molecular Enzymology and Engineering of the Ministry of Education, Jilin University, China.
This book gathers some of the most talented and well-informed experts in the field, who not only summarize the recent breakthroughs and new findings, but also shed light on future research. Special emphasis is placed on the exciting new understanding of the molecular structure of one of the major enzymes (type 1 iodothyronine deiodinase) involved in the activation of the thyroid hormone. This breakthrough culminates the major effort in this field around the world. As a result, we can study the regulation of thyroid hormone activation mechanism at the molecular level. Two other important deiodinase enzymes (types II and III) are also reviewed. Alternate pathways of thyroid hormone metabolism represent another major advance. These pathways are associated with a variety of physiological and disease states, including fasting, glucocorticoid excess, fetal development, and inflammatory and non-thyroidal illnesses. The understanding of these pathways assists us to better understand the physiological and biological basis of the disease process and thus to improve clinical management of patients with thyroidal and non-thyroidal illnesses.
This book constitutes the refereed proceedings of the 4th International Conference on Intelligent Data Analysis, IDA 2001, held in Cascais, Portugal, in September 2001.The 37 revised full papers presented were carefully reviewed and selected from a total of almost 150 submissions. All current aspects of this interdisciplinary field are addressed; the areas covered include statistics, artificial intelligence, neural networks, machine learning, data mining, and interactive dynamic data visualization.
MILS-13 provides an up-to-date review on the relationships between essential metals and human diseases, covering 13 metals and 3 metalloids: The bulk metals sodium, potassium, magnesium, and calcium, plus the trace elements manganese, iron, cobalt, copper, zinc, molybdenum, and selenium, all of which are essential for life. Also covered are chromium, vanadium, nickel, silicon, and arsenic, which have been proposed as being essential for humans in the 2nd half of the last century. However, if at all, they are needed only in ultra-trace amounts, and because of their prevalence in the environment, it has been difficult to prove whether or not they are required. In any case, all these elements a...
This volume of Methods in Enzymology is concerned with the rapidly developing field of selenoprotein synthesis and its related molecular genetics. Progressive information on the topics of proteins as redox sensors, selenoproteins, and the thioredoxin system is studied using methods such as bioinformatics, DNA chip technology, cell biology, molecular genetics, and enzymology. The information on novel selenoproteins identified from genomic sequence data, as well as current knowledge on glutathione peroxidases, selenoprotein P, iodothyronine deiodinases, and thioredoxin reductases, is presented in a method-based approach.
“Role of selenium in health and disease”. This book contains ten articles covering recent advances in our understanding of the relationship between the essential micronutrient selenium and human health and disease. Taken together, these articles strengthen the evidence showing that selenium, as a constituent of selenoproteins, is central to biological stress responses and mechanisms commonly altered in most complex disorders. Relevant to public health concerns, this book also emphasizes the U-shaped dose-response relationship between selenium concentration and disease risk across diverse populations from Europe [articles 2,3,6], the Middle East and North Africa [9], and Taiwan [5]. This ...
This book constitutes the refereed proceedings of the 15th Annual Symposium on Combinatorial Pattern Matching, CPM 2004, held in Istanbul, Turkey in July 2004. The 36 revised full papers presented were carefully reviewed and selected from 79 submissions. The papers are devoted to current theoretical and computational aspects of searching and matching of strings and more complicate patterns, such as trees, regular expressions, graphs, point sets, and arrays. Among the application fields addressed are computational biology, bioinformatics, genomics, proteinomics, the web, data compression, coding, multimedia, information retrieval, data analysis, pattern recognition, and computer vision.
MILS-15 provides an up-to-date review of the metalloenzymes involved in the activation, production, and conversion of molecular oxygen as well as the functionalization of the chemically inert gases methane and ammonia. Found either in aerobes (humans, animals, plants, microorganisms) or in anaerobes (so-called “impossible bacteria”) these enzymes employ preferentially iron and copper at their active sites, in order to conserve energy by redox-driven proton pumps, to convert methane to methanol, or ammonia to hydroxylamine or other compounds. When it comes to the light-driven production of molecular oxygen, the tetranuclear manganese cluster of photosystem II must be regarded as the key p...
The major objective of this book is to review in detail health problems occurring with significant frequency in aging adults which are proposed to be treated or ameliorated using nutriceuticals as foods and dietary supplements as well as other complementary and alternative therapies. Chapters primarily focusing on nutrients have been excluded to maintain a focus on complementary and alternative medicine (CAM). The book is divided into three general sections: 1. Nutriceuticals and Botanicals in Health Promotion - including Specific Nutriceuticals Used in Treating Aged; and General Nutraceutical Approaches to Therapy with emphasis on cancer. 2. Non-nutritional CAM Therapies – including Mind-...