Download or read book Vitamin B12 and Folate Interactions in Nuclear One carbon Metabolism written by Ashley Melissa Palmer and published by . This book was released on 2017 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vitamin B12-associated pathologies are common, but the underlying mechanisms are unclear. In the cytosol, vitamin B12 functions as a required cofactor for methionine synthase (MTR) in the remethylation of homocysteine to methionine, which regenerates tetrahydrofolate (THF) for subsequent nucleotide biosyntheses. Impairments in this pathway are most apparent in megaloblastic anemia, which results from the inhibition of DNA synthesis due to the trapping of folate cofactors as 5-methyltetrahydrofolate (5-methylTHF). The first objective sought to determine the impact of maternal vitamin B12 deficiency and Shmt1 disruption on neural tube defect (NTD) incidence. Vitamin B12 deficiency, independently of folate status, caused NTDs in Shmt1-/- and Shmt1-/+ embryos. Folate status and folate-deficiency in vitamin B12 deficiency did not affect NTD incidence. Folate, but not vitamin B12 deficiency, significantly increased plasma homocysteine in pregnant dams and resulted in decreased embryonic growth. Taken together, these findings suggest that neural tube closure is more sensitive to maternal vitamin B12 deficiency than homocysteine remethylation or embryonic growth. The second objective aimed to determine the impact of a cytosolic vitamin B12 deficiency on nuclear de novo thymidylate (dTMP) biosynthesis, given the recent discovery of a nuclear, multi-protein complex for de novo synthesis of dTMP. Both human fibroblasts with loss-of-function mutations in MTR and HeLa cells treated with nitrous oxide (N2O) gas demonstrated intracellular accumulation of 5-methylTHF ranging from 1.75-2.5-fold compared to control conditions. In vitamin B12 depleted HeLa cells, the nucleus was the most sensitive cellular compartment to 5-methylTHF accumulation, with a greater than 4-fold increase observed at the expense of THF. Vitamin B12 depletion in HeLa cells impaired rates of de novo dTMP biosynthesis and increased DNA damage; both outcomes were exacerbated by folate depletion. By contrast, MTR loss-of-function depressed rates of de novo dTMP biosynthesis, but did not increase DNA damage; this latter observation may be explained by the fact that specific tissues exhibit differential sensitivity to vitamin B12 deficiency. Taken together, these findings demonstrate cytosolic vitamin B12 depletion traps nuclear folate as 5-methylTHF, decreases rates of de novo dTMP biosynthesis, and increases DNA damage, providing a mechanism that can be extended to vitamin B12-associated pathologies. ...

Download or read book Nutrition and Lifestyle for Pregnancy and Breastfeeding written by Peter D. Gluckman and published by . This book was released on 2015 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explaining the practical implications of new discoveries in 'life-course biology', Nutrition and Lifestyle for Pregnancy and Breastfeeding is an informed resource on factors that affect offspring development. The impact of parental lifestyle and behavioural choices influence not only fetal development and birth outcomes, but also postnatal development, yet guidance on appropriate diet, behaviour, and exposures during pregnancy is often confusing and contradictory. With accessible explanations of the latest scientific research, and clear summaries and recommendations, this book is a valuable and authoritative guide for all levels of health care providers. The authors provide an overview of the background evidence, highlighting the importance of lifestyle choices prior to and during pregnancy. In-depth discussions of nutritional and lifestyle factors that impact on pregnancy and offspring outcomes are based on the latest research and exploration of key scientific studies. Nutrition and Lifestyle for Pregnancy and Breastfeeding is a manual offering both scientific and clinical evidence to empower health care providers and ensure they have the information necessary to confidently care for prospective and new parents.

Download or read book Geriatric Gastroenterology written by C. S. Pitchumoni and published by Springer Science & Business Media. This book was released on 2012-07-26 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: As aging trends in the United States and Europe in particular are strongly suggestive of increasingly older society, it would be prudent for health care providers to better prepare for such changes. By including physiology, disease, nutrition, pharmacology, pathology, radiology and other relevant associated topics, Geriatric Gastroenterology fills the void in the literature for a volume devoted specifically to gastrointestinal illness in the elderly. This unique volume includes provision of training for current and future generations of physicians to deal with the health problems of older adults. It will also serve as a comprehensive guide to practicing physicians for ease of reference. Relevant to the geriatric age group, the volume covers epidemiology, physiology of aging, gastrointestinal physiology, pharmacology, radiology, pathology, motility disorders, luminal disorders, hepato-biliary disease, systemic manifestations, neoplastic disorders, gastrointestinal bleeding, cancer and medication related interactions and adverse events, all extremely common in older adults; these are often hard to evaluate and judge, especially considering the complex aging physiology. All have become important components of modern medicine. Special emphasis is be given to nutrition and related disorders. Capsule endoscopy and its utility in the geriatric population is also covered. Presented in simple, easy to read style, the volume includes numerous tables, figures and key points enabling ease of understanding. Chapters on imaging and pathology are profusely illustrated. All chapters are written by specialists and include up to date scientific information. Geriatric Gastroenterology is of great utility to residents in internal medicine, fellows in gastroenterology and geriatric medicine as well as gastroenterologists, geriatricians and practicing physicians including primary care physicians caring for older adults.

Download or read book Dietary Reference Intakes for Thiamin Riboflavin Niacin Vitamin B6 Folate Vitamin B12 Pantothenic Acid Biotin and Choline written by Institute of Medicine and published by National Academies Press. This book was released on 2000-07-15 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1941, Recommended Dietary Allowances (RDAs) has been recognized as the most authoritative source of information on nutrient levels for healthy people. Since publication of the 10th edition in 1989, there has been rising awareness of the impact of nutrition on chronic disease. In light of new research findings and a growing public focus on nutrition and health, the expert panel responsible for formulation RDAs reviewed and expanded its approachâ€"the result: Dietary Reference Intakes. This new series of references greatly extends the scope and application of previous nutrient guidelines. For each nutrient the book presents what is known about how the nutrient functions in the human body, what the best method is to determine its requirements, which factors (caffeine or exercise, for example) may affect how it works, and how the nutrient may be related to chronic disease. This volume of the series presents information about thiamin, riboflavin, niacin, vitamin B6, folate, vitamin B12, pantothenic acid, biotin, and choline. Based on analysis of nutrient metabolism in humans and data on intakes in the U.S. population, the committee recommends intakes for each age groupâ€"from the first days of life through childhood, sexual maturity, midlife, and the later years. Recommendations for pregnancy and lactation also are made, and the book identifies when intake of a nutrient may be too much. Representing a new paradigm for the nutrition community, Dietary Reference Intakes encompasses: Estimated Average Requirements (EARs). These are used to set Recommended Dietary Allowances. Recommended Dietary Allowances (RDAs). Intakes that meet the RDA are likely to meet the nutrient requirement of nearly all individuals in a life-stage and gender group. Adequate Intakes (AIs). These are used instead of RDAs when an EAR cannot be calculated. Both the RDA and the AI may be used as goals for individual intake. Tolerable Upper Intake Levels (ULs). Intakes below the UL are unlikely to pose risks of adverse health effects in healthy people. This new framework encompasses both essential nutrients and other food components thought to pay a role in health, such as dietary fiber. It incorporates functional endpoints and examines the relationship between dose and response in determining adequacy and the hazards of excess intake for each nutrient.

Download or read book B Vitamins and One Carbon Metabolism written by Kristina Pentieva and published by MDPI. This book was released on 2018-06-26 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "B-Vitamins and One-Carbon Metabolism" that was published in Nutrients

Download or read book PDR for Nutritional Supplements written by Sheldon Saul Hendler and published by Physician's Desk Reference (PDR). This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physicians can use this fact-filled second edition to advise patients in their quest to learn about proper use of supplements and functional foods. Now updated and including new information on functional foods.

Download or read book Molecular Basis of Nutrition and Aging written by Marco Malavolta and published by Academic Press. This book was released on 2016-04-15 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Basis of Nutrition and Aging: A Volume in the Molecular Nutrition Series focuses on the nutritional issues associated with aging and the important metabolic consequences of diet, nutrition, and health. The book is subdivided into four parts that reflect the impact of nutrition from a biomolecular level to individual health. In Part One, chapters explore the general aspects of aging, aging phenotypes, and relevant aspects of nutrition related to the elderly and healthy aging. Part Two includes molecular and cellular targets of nutrition in aging, with chapters exploring lipid peroxidation, inflammaging, anabolic and catabolic signaling, epigenetics, DNA damage and repair, redox homeostasis, and insulin sensitivity, among others. Part Three looks at system-level and organ targets of nutrition in aging, including a variety of tissues, systems, and diseases, such as immune function, the cardiovascular system, the brain and dementia, muscle, bone, lung, and many others. Finally, Part Four focuses on the health effects of specific dietary compounds and dietary interventions in aging, including vitamin D, retinol, curcumin, folate, iron, potassium, calcium, magnesium, zinc, copper, selenium, iodine, vitamin B, fish oil, vitamin E, resveratrol, polyphenols, vegetables, and fruit, as well as the current nutritional recommendations. Offers updated information and a perspectives on important future developments to different professionals involved in the basic and clinical research on all major nutritional aspects of aging Explores how nutritional factors are involved in the pathogenesis of aging across body systems Investigates the molecular and genetic basis of aging and cellular senescence through the lens of the rapidly evolving field of molecular nutrition

Download or read book Dietary Reference Intakes for Vitamin A Vitamin K Arsenic Boron Chromium Copper Iodine Iron Manganese Molybdenum Nickel Silicon Vanadium and Zinc written by Institute of Medicine and published by National Academies Press. This book was released on 2002-07-19 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the newest release in the authoritative series issued by the National Academy of Sciences on dietary reference intakes (DRIs). This series provides recommended intakes, such as Recommended Dietary Allowances (RDAs), for use in planning nutritionally adequate diets for individuals based on age and gender. In addition, a new reference intake, the Tolerable Upper Intake Level (UL), has also been established to assist an individual in knowing how much is "too much" of a nutrient. Based on the Institute of Medicine's review of the scientific literature regarding dietary micronutrients, recommendations have been formulated regarding vitamins A and K, iron, iodine, chromium, copper, manganese, molybdenum, zinc, and other potentially beneficial trace elements such as boron to determine the roles, if any, they play in health. The book also: Reviews selected components of food that may influence the bioavailability of these compounds. Develops estimates of dietary intake of these compounds that are compatible with good nutrition throughout the life span and that may decrease risk of chronic disease where data indicate they play a role. Determines Tolerable Upper Intake levels for each nutrient reviewed where adequate scientific data are available in specific population subgroups. Identifies research needed to improve knowledge of the role of these micronutrients in human health. This book will be important to professionals in nutrition research and education.

Download or read book Nutritional Biochemistry of the Vitamins written by David A. Bender and published by Cambridge University Press. This book was released on 2003-09-18 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: An authoritative and comprehensive review of our current knowledge of the vitamins, their metabolic functions and the scientific basis for setting recommended intakes for the prevention of deficiency and promotion of optimum health. This publication will be a valuable reference for students and specialists alike in the field of nutritional biochemistry.

Download or read book Homocysteine and Vascular Disease written by K. Robinson and published by Springer Science & Business Media. This book was released on 2000-04-30 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This state-of-the-art review provides an in-depth and critical summary of homocysteine from its molecular basis to clinical relevance and current clinical trials of folic acid and vitamin B6. Written by leading workers in the field, the book provides an authoritative, comprehensive and thoroughly up-to-date overview for scientists and clinicians and any others engaged in the field. It will also be useful to anyone involved in managing vascular patients or cardiac risk factors, as well as biochemists, pharmacologists, general physicians, cardiologists and clinical and basic researchers with an interest in preventive medicine.

Download or read book Introduction to Epigenetics written by Renato Paro and published by Springer Nature. This book was released on 2021-03-23 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access textbook leads the reader from basic concepts of chromatin structure and function and RNA mechanisms to the understanding of epigenetics, imprinting, regeneration and reprogramming. The textbook treats epigenetic phenomena in animals, as well as plants. Written by four internationally known experts and senior lecturers in this field, it provides a valuable tool for Master- and PhD- students who need to comprehend the principles of epigenetics, or wish to gain a deeper knowledge in this field. After reading this book, the student will: Have an understanding of the basic toolbox of epigenetic regulation Know how genetic and epigenetic information layers are interconnected Be able to explain complex epigenetic phenomena by understanding the structures and principles of the underlying molecular mechanisms Understand how misregulated epigenetic mechanisms can lead to disease

Download or read book Handbook of Drug Nutrient Interactions written by Joseph I. Boullata and published by Springer Science & Business Media. This book was released on 2010-03-17 with total page 823 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Drug-Nutrient Interactions, Second Edition is an essential new work that provides a scientific look behind many drug-nutrient interactions, examines their relevance, offers recommendations, and suggests research questions to be explored. In the five years since publication of the first edition of the Handbook of Drug-Nutrient Interactions new perspectives have emerged and new data have been generated on the subject matter. Providing both the scientific basis and clinical relevance with appropriate recommendations for many interactions, the topic of drug-nutrient interactions is significant for clinicians and researchers alike. For clinicians in particular, the book offers a guide for understanding, identifying or predicting, and ultimately preventing or managing drug-nutrient interactions to optimize patient care. Divided into six sections all chapters have been revised or are new to this edition. Chapters balance the most technical information with practical discussions and include outlines that reflect the content; discussion questions that can guide the reader to the critical areas covered in each chapter, complete definitions of terms with the abbreviation fully defined and consistent use of terms between chapters. The editors have performed an outstanding service to clinical pharmacology and pharmaco-nutrition by bringing together a multi-disciplinary group of authors. Handbook of Drug-Nutrient Interactions, Second Edition is a comprehensive up-to-date text for the total management of patients on drug and/or nutrition therapy but also an insight into the recent developments in drug-nutrition interactions which will act as a reliable reference for clinicians and students for many years to come.

Download or read book Handbook of Nutrition Diet and Epigenetics written by Vinood B. Patel and published by Springer. This book was released on 2019-02-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multivolume reference work addresses the fact that the well being of humankind is predicated not only on individuals receiving adequate nutrition but also on their genetic makeup. The work includes more than 100 chapters organized in the following major sections: Introduction and Overview; Epigenetics of Organs and Diseases in Relation to Diet and Nutrition; Detailed Processes in Epigenetics of Diet and Nutrition; Modulating Epigenetics with Diet and Nutrition; and Practical Techniques. While it is well known that genes may encode proteins responsible for structural and dynamic components, there is an increasing body of evidence to suggest that nutrition itself may alter the way in which genes are expressed via the process of epigenetics. This is where chemically imposed alteration in the DNA sequence occurs or where the functional expression of DNA is modulated. This may include changes in DNA methylation, non-coding RNA, chromatin, histone acetylation or methylation, and genomic imprinting. Knowledge regarding the number of dietary components that impact on epigenetic processes is increasing almost daily. Marshalling all the information on the complex relationships between diet, nutrition, and epigenetic processes is somewhat difficult due to the wide myriad of material. It is for this reason that the present work has been compiled.

Download or read book Dietary Reference Intakes for Vitamin C Vitamin E Selenium and Carotenoids written by Institute of Medicine and published by National Academies Press. This book was released on 2000-08-27 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the newest release in the authoritative series of quantitative estimates of nutrient intakes to be used for planning and assessing diets for healthy people. Dietary Reference Intakes (DRIs) is the newest framework for an expanded approach developed by U.S. and Canadian scientists. This book discusses in detail the role of vitamin C, vitamin E, selenium, and the carotenoids in human physiology and health. For each nutrient the committee presents what is known about how it functions in the human body, which factors may affect how it works, and how the nutrient may be related to chronic disease. Dietary Reference Intakes provides reference intakes, such as Recommended Dietary Allowances (RDAs), for use in planning nutritionally adequate diets for different groups based on age and gender, along with a new reference intake, the Tolerable Upper Intake Level (UL), designed to assist an individual in knowing how much is "too much" of a nutrient.

Download or read book Nutritional Epigenomics written by and published by Academic Press. This book was released on 2019-07-20 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutritional Epigenomics offers a comprehensive overview of nutritional epigenomics as a mode of study, along with nutrition’s role in the epigenomic regulation of disease, health and developmental processes. Here, an expert team of international contributors introduces readers to nutritional epigenomic regulators of gene expression, our diet’s role in epigenomic regulation of disease and disease inheritance, caloric restriction and exercise as they relate to recent epigenomic findings, and the influence of nutritional epigenomics over circadian rhythms, aging and longevity, and fetal health and development, among other processes. Disease specific chapters address metabolic disease (obesity and diabetes), cancer, and neurodegeneration, among other disorders. Diet-gut microbiome interactions in the epigenomic regulation of disease are also discussed, as is the role of micronutrients and milk miRNAs in epigenetic regulation. Finally, chapter authors examine ongoing discussions of race and ethnicity in the social-epigenomic regulation of health and disease. Empowers the reader to employ nutritional epigenomics approaches in their own research Discusses the latest topics in nutritional epigenomics in the regulation of aging, circadian rhythm, inheritance and fetal development, as well as metabolism and disease Offers a full grounding in epigenetic reprogramming and nutritional intervention in the treatment and prevention of disease, as informed by population-based studies

Download or read book Present Knowledge in Nutrition written by John W. Erdman, Jr. and published by John Wiley & Sons. This book was released on 2012-05-30 with total page 2062 pages. Available in PDF, EPUB and Kindle. Book excerpt: Present Knowledge in Nutrition, 10th Edition provides comprehensive coverage of all aspects of human nutrition, including micronutrients, systems biology, immunity, public health, international nutrition, and diet and disease prevention. This definitive reference captures the current state of this vital and dynamic science from an international perspective, featuring nearly 140 expert authors from 14 countries around the world. Now condensed to a single volume, this 10th edition contains new chapters on topics such as epigenetics, metabolomics, and sports nutrition.The remaining chapters have been thoroughly updated to reflect recent developments. Suggested reading lists are now provided for readers wishing to delve further into specific subject areas. An accompanying website provides book owners with access to an image bank of tables and figures as well as any updates the authors may post to their chapters between editions. Now available in both print and electronic formats, the 10th edition will serve as a valuable reference for researchers, health professionals, and policy experts as well as educators and advanced nutrition students.

Download or read book Nutrition and Immunity written by Maryam Mahmoudi and published by Springer. This book was released on 2019-07-30 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides readers with a systematic assessment of current literature on the link between nutrition and immunity. Chapters cover immunonutrition topics such as child development, cancer, aging, allergic asthma, food intolerance, obesity, and chronic critical illness. It also presents a thorough review of microflora of the gut and the essential role it plays in regulating the balance between immune tolerance and inflammation. Written by experts in the field, Nutrition and Immunity helps readers to further understand the importance of healthy dietary patterns in relation to providing immunity against disorders and offering readily available immunonutritional programming in clinical care. It will be a valuable resource for dietitians, immunologists, endocrinologists and other healthcare professionals.