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B Group Vitamins - Current Uses and Perspectives最新文献

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Folate in Dentistry 叶酸在牙科中的应用
Pub Date : 2018-09-26 DOI: 10.5772/INTECHOPEN.74055
Aysan Lektemur Alpan and Nebi Cansin Karakan
Balanced nutrition is the key point of a healthy life includes intake of vitamins and minerals. Vitamins such as folate (B9) have an important role in system homeostasis. Vitamin B derivatives, also folate are water-soluble vitamin class which plays a key role in cell metabolism. Folate is necessary to produce new cells via stimulating DNA and RNA methylation. Folate has positive effect on recurrent aphthous stomatitis, gingival hyperplasia, preventing early childhood caries and periodontal diseases. Alveolar bone and periodontal ligament development are related to sufficient concentrations of folate. Folate reduces gum bleeding, and increases osteoblastic activity and bone mineral density, also decreases osteoclastic activity. Effect on DNA and RNA metabolism causes the reduction of reactive oxygen species. In early stages of pregnancy, folate deficiency may cause birth anomalies due to neural tube defects such as lip, alveolar and palatal clefts. Folate deficiency effects on DNA and RNA metabolism negatively. DNA and RNA repair, production and methylation system is being interrupted. Therefore chromosal abnormalities occur and that situation may cause cancer and leukemia. Folate is mainly provides systemic homeostasis and important for maintaining chromosomal activities. Consequently adequate concentrations of folate must be taken regularly.
均衡的营养是健康生活的关键,包括维生素和矿物质的摄入。维生素如叶酸(B9)在系统稳态中起重要作用。维生素B衍生物和叶酸是水溶性维生素类,在细胞代谢中起关键作用。叶酸是通过刺激DNA和RNA甲基化来产生新细胞所必需的。叶酸对复发性口腔炎、牙龈增生、预防幼儿龋齿和牙周病有积极作用。牙槽骨和牙周韧带的发育与足够浓度的叶酸有关。叶酸减少牙龈出血,增加成骨细胞活动和骨矿物质密度,也减少破骨细胞活动。对DNA和RNA代谢的影响导致活性氧的减少。在妊娠早期,叶酸缺乏可能会引起神经管缺陷,如唇裂、牙槽裂和腭裂,从而导致出生异常。叶酸缺乏对DNA和RNA代谢有负面影响。DNA和RNA的修复、生产和甲基化系统被中断。因此,染色体发生异常,这种情况可能导致癌症和白血病。叶酸主要提供系统内稳态,对维持染色体活动很重要。因此,必须定期摄取足够浓度的叶酸。
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引用次数: 2
Deficiency of Folate in Pregnancy on Diverse Subjects Using FTIR Spectroscopy 利用FTIR光谱分析不同受试者孕期叶酸缺乏症
Pub Date : 2018-09-26 DOI: 10.5772/INTECHOPEN.74829
R. R. Sultana, S. N. Zafarullah, N. Kirubamani
This study is an attempt to assess, evaluate and compare the spectral difference in saliva and serum between healthy and anomalies pregnant women because of deficiency of folate by utilizing Fourier Transform Infrared Spectroscopy. Folate is required for the development of healthy embryo and plays vital role in the fetus spinal cord and brain development. The present work is to study the folate deficiency in pregnancy-Anomalies (open neural defect) and contrast the outcome of the result with normal healthy pregnant women. The outcome of the results showed that there is a significant difference or contrast between the folate of healthy pregnant and anomalies (open neural defect) in pregnant women, both in the sample of saliva and serum. From the spectral analysis, the intensity ratio parameters have been computed and introduced. The result of the outcomes shows that for both qualitative and quantitative investigation of biological fluids and to distinguish between the sample sets from healthy and anomalies-diseased groups, FTIR is utilized. The internal standard method is described in characterizing the samples quantitatively.
本研究旨在利用傅立叶变换红外光谱技术评估、评价和比较健康孕妇和因叶酸缺乏而导致的异常孕妇唾液和血清的光谱差异。叶酸是胚胎健康发育所必需的,对胎儿脊髓和大脑发育起着至关重要的作用。本研究旨在探讨叶酸缺乏与妊娠异常(开放性神经缺损)的关系,并与正常健康孕妇进行比较。结果表明,健康孕妇和异常孕妇(开放性神经缺损)的叶酸在唾液和血清样本中存在显著差异或对比。从光谱分析出发,计算并介绍了光强比参数。结果表明,FTIR用于生物流体的定性和定量研究以及区分健康和异常病变组的样本集。描述了样品定量表征的内标法。
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引用次数: 0
Niacin, Metabolic Stress and Insulin Resistance in Dairy Cows 烟酸、代谢应激和奶牛胰岛素抵抗
Pub Date : 2018-09-26 DOI: 10.5772/INTECHOPEN.77268
M. Cincović, Talija Hristovska, B. Belic
The periparturient period in cows is associated with metabolic stress and a state of negative energy balance, which are characterized by increased lipolysis, ketogenesis, hepatic steatosis, oxidative stress and insulin resistance. Such metabolic changes may exert adverse effects on the health and milk yield of lactating cows. The pharmacoki netics of niacin in ruminants is specific as rumen microorganisms facilitate both the synthesis of tryptophan and the degradation of niacin. Niacin administration to cows leads to an increase in the coenzyme activity, encompassing the activity of nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP). These coenzymes are actively involved in the metabolism of lipids and carbohydrates, whereas NAD protects the organism from oxidative stress. In periparturient cows, the supplementation of niacin has been found to induce depressed lipolysis and a limited impact of nonesterified fatty acids on all metabolic processes. It also results in decreased lipid peroxidation regardless of the magnitude of lipolysis in the periparturient period. Furthermore, niacin reduces the concentration of ketone bodies, thus preventing the development of fatty lever disease and ketosis in cows. The anti-inflammatory effect of niacin is manifested in stimulating the secretion of adiponectin and inhibiting immune cells. Our results suggest [ 28] that blood NAD and NADP concentrations are a sensitive indicator of the niacin status of cows. The NAD concentrations obtained ranged from 860 to 895 pmol/mL in the control group in the weeks before and after calving. In niacin-supplemented cows, the following NAD concentrations were obtained: 1724.6 pmol/L in the week of calving (week 0), 1968.6 pmol/mL in the first week after calving and 1771.8 pmol/L in the second week after calv ing. The NADP concentrations obtained in the control group ranged from 385.09 to 425.62 pmol/ mL during the entire period under consideration. In niacin-supplemented cows, the following NADP concentrations were obtained: 704.45 pmol/L in the week of calving (week 0), 778.36 pmol/L in the first week after calving and 796.18 pmol/L in the second week after calving.
围产期奶牛处于代谢应激和负能量平衡状态,表现为脂肪分解、生酮、肝脂肪变性、氧化应激和胰岛素抵抗增加。这种代谢变化可能对泌乳奶牛的健康和产奶量产生不利影响。反刍动物烟酸的药代动力学是特异性的,因为瘤胃微生物既促进色氨酸的合成,又促进烟酸的降解。烟酸可提高乳牛的辅酶活性,包括烟酰胺腺嘌呤二核苷酸(NAD)和烟酰胺腺嘌呤二核苷酸磷酸(NADP)活性。这些辅酶积极参与脂质和碳水化合物的代谢,而NAD则保护生物体免受氧化应激。在围产期奶牛中,已发现补充烟酸可诱导脂肪分解下降,而非酯化脂肪酸对所有代谢过程的影响有限。它还导致脂质过氧化降低,而不管围产期脂质分解的程度如何。此外,烟酸降低了酮体的浓度,从而防止了奶牛脂肪杠杆病和酮症的发生。烟酸的抗炎作用表现为刺激脂联素的分泌,抑制免疫细胞。我们的研究结果表明[28],血液NAD和NADP浓度是奶牛烟酸状态的敏感指标。对照组产犊前后数周NAD浓度为860 ~ 895 pmol/mL。在添加烟酸的奶牛中,NAD浓度为:产犊第1周(第0周)为1724.6 pmol/L,产犊第1周为1968.6 pmol/mL,产犊第2周为1771.8 pmol/L。在整个研究期间,对照组获得的NADP浓度范围为385.09至425.62 pmol/ mL。在添加烟酸的奶牛中,产犊第一周(第0周)的NADP浓度为704.45 pmol/L,产犊第一周为778.36 pmol/L,产犊第二周为796.18 pmol/L。
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引用次数: 4
Introductory Chapter: B-Group Vitamins 导论:b族维生素
Pub Date : 2018-09-26 DOI: 10.5772/intechopen.80023
J. Leblanc
Vitamins are organic micronutrients, which are substances that must be present in small quantities and that are essential for the growth and development of the human body and are required in numerous metabolic reactions to maintain homeostasis. The 13 vitamins that are required by human metabolisms are divided as either being fat-soluble vitamins (such as vitamins A (retinols and carotenoids), D (cholecalciferol), E (tocopherols and tocotrienols), and K (quinones)) or water-soluble vitamins (which include vitamin C (ascorbic acid) and the B-group vitamins). In the latter group (B-group), these include: vitamin B1 (thiamine), vitamin B2 (riboflavin), vitamin B3 (niacin), vitamin B5 (pantothenic acid), vitamin B6 (pyridoxine), vitamin B7 (biotin), vitamin B9 (folic acid or folate), and vitamin B12 (cobalamins).
维生素是有机微量营养素,必须少量存在,是人体生长发育所必需的物质,也是许多代谢反应维持体内平衡所必需的。人体代谢所需的13种维生素分为脂溶性维生素(如维生素A(视黄醇和类胡萝卜素)、D(胆钙化醇)、E(生育酚和生育三烯醇)和K(醌))或水溶性维生素(包括维生素C(抗坏血酸)和b族维生素)。在后一组(b组)中,这些包括:维生素B1(硫胺素)、维生素B2(核黄素)、维生素B3(烟酸)、维生素B5(泛酸)、维生素B6(吡哆醇)、维生素B7(生物素)、维生素B9(叶酸或叶酸盐)和维生素B12(钴胺素)。
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引用次数: 2
Vitamin B1 (Thiamine) Metabolism and Regulation in Archaea 古菌中维生素B1(硫胺素)的代谢与调控
Pub Date : 2018-09-26 DOI: 10.5772/INTECHOPEN.77170
J. Maupin-Furlow
Thiamine is the water-soluble sulfur containing vitamin B1 that is used to form thiamine diphosphate (ThDP), an enzyme cofactor important in the metabolism of carbohydrates, amino acids and other organic molecules. ThDP is synthesized de novo by certain bacteria, archaea, yeast, fungi, plants, and protozoans. Other organisms, such as humans, rely upon thiamine transport and salvage for metabolism; thus, thiamine is considered an essential vitamin. The focus of this chapter is on the regulation and metabolism of thiamine in archaea. The review will discuss the role ThDP has as an enzyme cofactor and the catalytic and regulatory mechanisms that archaea use to synthesize, salvage and transport thiamine. Future perspectives will be articulated in terms of how archaea have advanced our understanding of thiamine metabolism, regulation and biotechnology applications.
硫胺素是一种含有维生素B1的水溶性硫,用于形成二磷酸硫胺素(ThDP),这是一种在碳水化合物、氨基酸和其他有机分子的代谢中很重要的酶辅因子。ThDP是由某些细菌、古细菌、酵母、真菌、植物和原生动物重新合成的。其他生物,如人类,依靠硫胺素的运输和回收来进行新陈代谢;因此,硫胺素被认为是一种必需的维生素。本章的重点是在古细菌硫胺素的调节和代谢。本文将对ThDP作为酶辅因子的作用及古菌合成、回收和转运硫胺素的催化调控机制进行综述。未来的观点将在古细菌如何推进我们对硫胺素代谢,调节和生物技术应用的理解方面进行阐述。
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引用次数: 8
Vitamin B2 and Innovations in Improving Blood Safety 维生素B2和改善血液安全的创新
Pub Date : 2018-09-26 DOI: 10.5772/INTECHOPEN.78260
R. Goodrich, Marcia Cardoso, S. Marschner
Although transfusion of blood components is becoming increasingly safe, the risk of trans- mission of known and unknown pathogens persists. The application of vitamin B2 (ribo-flavin) and UV light to pathogen inactivation has several appealing factors. Riboflavin is a naturally occurring vitamin with a well-known and well-characterized safety profile. This photochemical-based method is effective against clinically relevant pathogens and inactivates leukocytes without significantly compromising the content and the efficacy of whole blood or blood component. This chapter gives an overview of the innovative technology for pathogen inactivation, the Mirasol ® pathogen reduction technology (PRT) System, based on riboflavin and UV light, summarizing the mechanism of action, toxicol - ogy profile, pathogen reduction performance and clinical efficacy of the process.
虽然血液成分的输血正变得越来越安全,但已知和未知病原体传播的风险仍然存在。维生素B2(核黄素)和紫外线在病原体灭活中的应用有几个吸引人的因素。核黄素是一种天然存在的维生素,具有众所周知的安全性。这种基于光化学的方法对临床相关病原体有效,并在不显著影响全血或血液成分含量和功效的情况下灭活白细胞。本章综述了基于核黄素和紫外线的创新性病原体灭活技术Mirasol®病原体还原技术(PRT)系统,综述了该技术的作用机制、毒理学特征、病原体还原性能和临床疗效。
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引用次数: 1
The Role of Thiamine in Plants and Current Perspectives in Crop Improvement 硫胺素在植物中的作用及其在作物改良中的研究进展
Pub Date : 2018-09-26 DOI: 10.5772/INTECHOPEN.79350
A. Subki, Aisamuddin Ardi Zainal Abidin, Z. Yusof
Current research is focusing on selecting potential genes that can alleviate stress and produce disease-tolerant crop variety. The novel paradigm is to investigate the potential of thiamine as a crop protection molecule in plants. Thiamine or vitamin B1 is important for primary metabolism for all living organisms. The active form, thiamine pyrophosphate (TPP), is a cofactor for the enzymes involved in the synthesis of amino acids, tricarboxylic acid cycle and pentose phosphate pathway. Recently, thiamine is shown to have a role in the processes underlying protection of plants against biotic and abiotic stresses. The aim of this chapter is to review the role of thiamine in plant growth and disease protection and also to highlight that TPP and its intermediates are involved in management of stress. The perspectives on its potential for manipulating the biosynthesis pathway in crop improvement will also be discussed.
目前的研究重点是选择能够减轻压力和产生抗病作物品种的潜在基因。新的范式是研究硫胺素作为植物作物保护分子的潜力。硫胺素或维生素B1对所有生物体的初级代谢都很重要。其活性形式为焦磷酸硫胺素(TPP),是参与氨基酸合成、三羧酸循环和戊糖磷酸途径的酶的辅助因子。最近,硫胺素被证明在保护植物免受生物和非生物胁迫的过程中起作用。本章的目的是回顾硫胺素在植物生长和疾病保护中的作用,并强调TPP及其中间体参与胁迫管理。对其在作物改良中操纵生物合成途径的潜力的观点也将进行讨论。
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引用次数: 19
Nutritional Guidance in Sakado Folate Project 坂户叶酸项目营养指导
Pub Date : 2018-02-16 DOI: 10.5772/INTECHOPEN.74396
Mayumi Yurimoto, M. Hiraoka, Mitsuyo Kageyama, Yoshiko Kontai, C. Nishijima, Kaori Sakamoto, Y. Kagawa
Background: Serum folate levels are lower in TT homozygotes of the single-nucleotide polymorphism (rs1801133) of methylenetetrahydrofolate reductase (MTHFR) than in CC homozygotes and CT heterozygotes. Objective : To improve folate status, the genotype was notified to each subject to motivate them to eat more green-yellow vegetables. Design: Genotype, dietary folate intake, and blood biochemistry were determined and statistically analyzed for 404 subjects (109 males, mean 58.9 years; 295 females, mean 61.8 years). Their serum folate and total homocysteine (tHcy) concentrations were mea- sured before and after receiving nutritional guidance and genotype notification. Results: The frequencies of the CC, CT, and TT MTHFR genotypes were 35.4, 49.7, and 14.8%, respectively. TT homozygote participants significantly increased their intake of green-yellow vegetables (p < 0.01) and of food-derived folate (p < 0.05) following nutritional guidance. The increase in serum folate (p < 0.001) and the decrease in tHcy (p < 0.001) in TT homozygotes following nutritional guidance were more than twice that of the CC homozygote and CT heterozygote participants. An increase in broccoli, spinach and Komatsuna intake was observed following nutritional guidance, irrespective of the season. Conclusion: Genotype notification was effective in increasing the intake of green-yellow vegetables and in improving folate status in TT homozygote participants.
背景:亚甲基四氢叶酸还原酶(MTHFR)单核苷酸多态性(rs1801133) TT纯合子的血清叶酸水平低于CC纯合子和CT杂合子。目的:为改善叶酸状况,将基因型告知每个受试者,激励他们多吃黄绿色蔬菜。设计:测定404例受试者的基因型、膳食叶酸摄入量和血液生化指标并进行统计分析(男性109例,平均58.9岁;295名女性,平均61.8岁)。在接受营养指导和基因型通知前后测定血清叶酸和总同型半胱氨酸(tHcy)浓度。结果:CC型、CT型和TT型MTHFR基因型的检出率分别为35.4%、49.7%和14.8%。TT纯合子参与者在营养指导下显著增加了黄绿色蔬菜(p < 0.01)和食物来源叶酸(p < 0.05)的摄入量。在营养指导下,TT纯合子的血清叶酸增加(p < 0.001)和tHcy下降(p < 0.001)是CC纯合子和CT杂合子参与者的两倍多。在营养指导下,无论季节如何,西兰花、菠菜和小松的摄入量都有所增加。结论:基因型通知在TT纯合子参与者中增加黄绿色蔬菜的摄入量和改善叶酸状态是有效的。
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引用次数: 0
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B Group Vitamins - Current Uses and Perspectives
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