Abstract：
:Carbon compounds that are needed in small amounts in the diet because they are not made in the body of vertebrates are defined as vitamins. Excluded from this definition are vitamins D, K, and niacin which can be synthesized by the organism or, as in the case of vitamin K, by the host's intestinal bacteria. Lack of such vitamins can result in characteristic deficiency diseases. The therapeutic use of such compounds (megavitamin intake) is based on the spectacular effect of vitamins on deficiency diseases; however, evidence that the ingestion of large amounts of vitamins beyond the "Recommended Daily Allowances" (RDA) is beneficial is not within the basic concept of nutrition. Vitamins, like many substances, may be toxic when taken in large quantities, especially the fat-soluble vitamins, and the concept of "more is better" is a common misconception. Vitamin supplements can be suggested only in the unusual cases of patients having inadequate intake, disturbed absorption (genetic or otherwise), or increased tissue requirements. A well-balanced diet that includes a wide variety of foods from each of the four food groups is adequate for the supply of vitamins, as well as other nutrients, in healthy people. This paper will review some of the recent findings regarding vitamin toxicity and the mechanisms of toxicity.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Omaye STdoi
10.1007/978-1-4684-4790-3_8subject
Has Abstractpub_date
1984-01-01 00:00:00pages
169-203eissn
0065-2598issn
2214-8019journal_volume
177pub_type
杂志文章,评审abstract：:The activation of 17beta-estradiol (E2) to 2-hydroxyestradiol (2-HO-E2), the more genotoxic 4-hydroxyestradiol (4-HO-E2), and the oxidation to the respective quinones constitutes a risk factor in hormonal carcinogenesis. 2-HO-E2 is formed by cytochrome P450 CYP1A1, and 4-HO-E2 is formed by CYP1B1. Both are detoxified ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-69080-3_65
更新日期：2008-01-01 00:00:00
abstract：:Foxp subfamily genes were recently recognized to be members of the Fox gene family. Foxp subfamily members contain a zinc finger domain and a leucine zipper motif in addition to a forkhead domain and their DNA binding capacities and transcriptional activities are regulated by homo- and heterodimerization via a zinc fi...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-1599-3_9
更新日期：2009-01-01 00:00:00
abstract：:Neuregulins, members of the largest subclass of growth factors of the epidermal growth factor family, mediate a myriad of cellular functions including survival, proliferation, and differentiation in normal tissues through binding to receptor tyrosine kinases of the ErbB family. However, aberrant neuregulin signaling i...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-030-47189-7_1
更新日期：2021-01-01 00:00:00
abstract：:1) Although virulence of enteropathogenic E. coli in the pig is essentially associated with the K88 adhesion determinant, protection of the neonate and weanling is not necessarily dependent upon antibodies to this surface antigen. 2) Modification of the surface antigenic characteristics of enteropathogens occurs in th...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3369-2_16
更新日期：1978-01-01 00:00:00
abstract：:The aim of the present study was (i) to investigate the effect of inner speech on cerebral hemodynamics and oxygenation, and (ii) to analyze if these changes could be the result of alternations of the arterial carbon dioxide pressure (PaCO2). To this end, in seven adult volunteers, we measured changes of cerebral abso...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4614-7411-1_12
更新日期：2013-01-01 00:00:00
abstract：:Transamniotic stem cell therapy (TRASCET) is a novel prenatal therapeutic alternative for the treatment of congenital anomalies. It is based upon the principle of augmenting the pre-existing biological role of select populations of fetal stem cells for targeted therapeutic benefit. For example, amniotic fluid-derived ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/5584_2019_416
更新日期：2020-01-01 00:00:00
abstract：:Oxygenation of a tumor is one of the most important predictive factors: hypoxia is associated with aggressive tumors and substantially lower survival rate. Despite this high relevance of tumor oxygenation, there is currently no bedside technique available to measure it in clinical routine care. The aim of this work is...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-91287-5_26
更新日期：2018-01-01 00:00:00
abstract：:De novo synthesis of RNA sequences corresponding to intervening as well as to structural sequences of the ovalbumin gene have been detected in isolated oviduct nuclei. Their presence in the nuclear transcripts and their time course of induction support the hypothesis that transcription of structural and intervening se...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4757-6589-2_25
更新日期：1979-01-01 00:00:00
abstract：:The power of the heart is dictated by the force development and velocity of shortening (V) of the cardiac sarcomere. Both depend on the amount of Ca++ released by the sarcoplasmic reticulum during the action potential. We have investigated the inter-relationship between force (F) sarcomere length (SL) and V and the in...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-1893-8_14
更新日期：1995-01-01 00:00:00
abstract：:The prognosis of patients with pulmonary arterial hypertension (PAH) is poor. Available therapies (Ca(++)-channel blockers, epoprostenol, bosentan) have limited efficacy or are expensive and associated with significant complications. PAH is characterized by vasoconstriction, thrombosis in-situ and vascular remodeling....
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-8997-0_21
更新日期：2003-01-01 00:00:00
abstract：:Smith-Lemli-Opitz Syndrome (SLOS) is a recessive hereditary disease caused by a defect in the last step in cholesterol biosynthesis - the reduction of the Delta7 double bond of 7-dehydrocholesterol (7DHC) - resulting in the abnormal accumulation of 7DHC and diminished levels of Chol in all bodily tissues. Treatment of...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-1399-9_55
更新日期：2010-01-01 00:00:00
abstract：:Our in vitro data indicate that peripheral blood monocytes or monocyte-derived immature dendritic cells under appropriate culture conditions transdifferentiate into endothelial-like cells (ELC), which are characterized by the expression of endothelial markers and the formation of tube-like structures. Dependent on the...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-0169-5_6
更新日期：2003-01-01 00:00:00
abstract：:The de novo generation of hematopoietic stem and progenitor cells (HSPC) occurs solely during embryogenesis from a population of epithelial cells called hemogenic endothelium (HE). During midgestation HE cells in multiple intra- and extraembryonic vascular beds leave the vessel wall as they transition into HSPCs in a ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-10-3233-2_4
更新日期：2017-01-01 00:00:00
abstract：:Studies of high-altitude populations, and in particular of maladapted subgroups, may provide important insight into underlying mechanisms involved in the pathogenesis of hypoxemia-related disease in general. Chronic mountain sickness (CMS) is a major public health problem in mountainous regions of the world affecting ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4899-7678-9_6
更新日期：2016-01-01 00:00:00
abstract：:The polymerase gene of Mouse Hepatitis Virus strain JHM (MHV-JHM) encodes a polyprotein larger than 750 kilodaltons. This polyprotein is proposed to be processed by several viral proteinases into functional subunits. The amino-terminal subunit is p28, which is cleaved by the first viral papain-like proteinase domain. ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:We examined whether acetazolamide (ACZ), a carbonic anhydrase inhibitor, would alter post-hypoxic ventilatory behavior and periodic breathing in the C57BL/6J (B6) mouse. Experiments were performed with unanaesthetized, awake adult male B6 mice (n = 5, 2.5 months old, 21.3 +/- 1.5 g, mean +/- SD) and ventilatory behavi...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-73693-8_13
更新日期：2008-01-01 00:00:00
abstract：:Sex difference plays a substantial role in the regulation of glucose metabolism in healthy glucose-tolerant humans. The factors which may contribute to the sex-related differences in glucose metabolism include differences in lifestyle (diet and exercise), sex hormones, and body composition. Several epidemiological and...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-70178-3_4
更新日期：2017-01-01 00:00:00
abstract：:Despite decades of research, cancer metastasis remains an incompletely understood process that is as complex as it is devastating. In recent years, there has been an increasing push to investigate the biomechanical aspects of tumorigenesis, complementing the research on genetic and biochemical changes. In contrast to ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4899-8032-8_20
更新日期：2014-01-01 00:00:00
abstract：:AFM-based Single Molecule Force Spectroscopy provides a new tool for probing the mechanical properties of single molecules. In this chapter we show that the unfolding forces of single protein domains can be directly measured. Unfolding forces give new insight into protein stability that cannot be deduced from thermody...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-4267-4_8
更新日期：2000-01-01 00:00:00
abstract：:We describe the events surrounding the identification of the exosome complex and the subsequent early development of the field. Like many scientific discoveries, the initial identification and characterization ofthe exosome was based on a combination of skill, good fortune--and the availability of cutting edge technol...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：
更新日期：2010-01-01 00:00:00
abstract：:Spermatogenesis involves precise co-ordination of multiple cellular events that take place in the seminiferous epithelium composed of Sertoli cells and developing germ cells during the seminiferous epithelial cycle. Given the cyclic and co-ordinated nature of spermatogenesis, temporal and spatial expression of certain...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4614-4711-5_14
更新日期：2012-01-01 00:00:00
abstract：:Intrarenal tissue hypoxia is an acknowledged common pathway to end-stage renal disease in clinically common conditions associated with development of chronic kidney disease, such as diabetes and hypertension. In diabetic kidneys, increased oxygen metabolism mediated by mitochondrial uncoupling results in decreased kid...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4614-7411-1_2
更新日期：2013-01-01 00:00:00
abstract：:The continuous part of a hybrid (pulse-modulated) model of testosterone (Te) feedback regulation in the human male is extended with infinite-dimensional and nonlinear blocks, to obtain the dynamics that better agree with the hormone concentration profiles observed in clinical data. A linear least-squares based optimiz...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-10984-8_2
更新日期：2015-01-01 00:00:00
abstract：:A number of patients with rheumatoid arthritis attending the Rheumatology Clinic at St Luke's Hospital are currently receiving the drug methotrexate as a second line disease-modifying agent. A survey has been conducted to assess the toxicity profile of methotrexate in 33 of these patients who were followed up for at l...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-4857-7_55
更新日期：1999-01-01 00:00:00
abstract：:As the main catalytic and structural molecules within living systems, proteins are the most likely biomolecules to be affected by radiation exposure. Proteomics, the comprehensive characterization of proteins within complex biological samples, is therefore a research approach ideally suited to assess the effects of ra...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-007-5896-4_1
更新日期：2013-01-01 00:00:00
abstract：:Speech intelligibility achieved with cochlear implants (CIs) shows large variability across different users. One reason that can explain this variability is the CI user's individual electrode nerve interface which can impact the spectral resolution they can achieve. Spectral resolution has been reported to be related ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-25474-6_11
更新日期：2016-01-01 00:00:00
abstract：:Insulin-like growth factor 1 (IGF-1) is a key anabolic growth factor stimulating phosphatidylinositol 3-kinase (PI3K)/Akt signaling which is well known for regulating muscle hypertrophy. However, the role of IGF-1 in muscle atrophy is less clear. This review provides an overview of the mechanisms via which IGF-1 signa...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-1435-3_6
更新日期：2018-01-01 00:00:00
abstract：:Bacteriophage play many varied roles in microbial ecology and evolution. This chapter collates a vast body of knowledge and expertise on Yersinia pestis phages, including the history of their isolation and classical methods for their isolation and identification. The genomic diversity of Y. pestis phage and bacterioph...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-024-0890-4_13
更新日期：2016-01-01 00:00:00
abstract：:In preterm infants, there is a risk of long-term cognitive, motor and behavioral impairments due to hemorrhagic and/or ischemic lesions. If detected early, lesions can be prevented. A bedside imaging modality, capable of early detection of both disorders, is necessary. We present the state of development of a tomograp...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-030-34461-0_44
更新日期：2020-01-01 00:00:00
abstract：:Although the gasotransmitter hydrogen sulfide (H(2)S) generally dilates systemic arteries in mammals, it causes constriction of pulmonary arteries. In isolated rat pulmonary arteries, we have shown that the H(2)S precursor cysteine enhances both hypoxic pulmonary vasoconstriction and tension development caused by the ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-18440-1_10
更新日期：2015-01-01 00:00:00
