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Vitamin A

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https://www.readbyqxmd.com/read/27911495/synthesis-and-evaluation-of-caged-sirna-with-terminal-single-vitamin-e-modification
#1
Jiali Yang, Lijia Yu, Liangliang Zhang, Xingsu Long, Yuzhuo Ji, Xinjing Tang
RNA-induced gene silencing has been widely applied as a powerful research tool in drug development due to its sequence-specific degradation of target mRNA. Conditional regulation of gene functions with small interfering RNAs (siRNAs) is highly useful, especially when specific gene expression regulation with spatiotemporal resolution and amplitude is desired. Here, the synthesis of a series of new caged siRNAs with vitamin E (vitE) modification and/or a single photolabile linker at the 5' terminal is described...
December 1, 2016: Current Protocols in Nucleic Acid Chemistry
https://www.readbyqxmd.com/read/27911294/deleterious-effect-of-butyrylcholinesterase-k-variant-in-donepezil-treatment-of-mild-cognitive-impairment
#2
Sophie Sokolow, Xiaohui Li, Lucia Chen, Kent D Taylor, Jerome I Rotter, Robert A Rissman, Paul S Aisen, Liana G Apostolova
BACKGROUND: Donepezil is an acetylcholinesterase inhibitor frequently prescribed for the treatment of mild cognitive impairment (MCI) though not approved by the Food and Drug Administration for this indication. In Alzheimer's disease, butyrylcholinesterase (BChE) activity increases with disease progression and may replace acetylcholinesterase function. The most frequent polymorphism of BChE is the K-variant, which is associated with lower acetylcholine-hydrolyzing activity. BChE-K polymorphism has been studied in Alzheimer's disease progression and donepezil therapy, and has led to contradictory results...
November 29, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911120/new-frontiers-in-anticoagulation-non-vitamin-k-oral-anticoagulants-in-stroke-prevention
#3
Valentina Arnao, Marianna Riolo, Antonino Tuttolomondo, Antonio Pinto, Brigida Fierro, Paolo Aridon
Non vitamin-K oral anticoagulants (NOACs) are direct and specific inhibitors of the coagulation factors IIa (dabigatran) and Xa (apixaban, rivaroxaban, edoxaban) which share many pharmacokinetic properties. However, indications are lacking regarding the use of NOACs during thrombolysis, surgery and bleeding events. Areas covered: In this paper, the authors retrospectively analyzed the relevant literature on the NOACs using the PubMed and Google Scholar databases. Expert Commentary: Although warfarin is effective in cardioembolic stroke prevention, easier handling and more favorable risk-benefit profile often render NOACs a more preferable therapy choice for neurologists...
December 2, 2016: Expert Review of Neurotherapeutics
https://www.readbyqxmd.com/read/27910985/uvb-radiation-vitamin-d-and-multiple-sclerosis
#4
H F DeLuca, L Plum
Acheson et al. (1960) observed an inverse relationship between sunlight exposure and the incidence of Multiple Sclerosis (MS). This led to the suggestion that increased levels of vitamin D caused by sunlight in some way suppresses MS. Further, super physiological doses of the metabolically active metabolite of vitamin D, i.e. 1α,25 dihydroxy vitamin D suppresses the animal model of MS i.e. experimental autoimmune encephalomyelitis (EAE). However, this response was accompanied by hypercalcemia. Hypercalcemia itself can suppress EAE...
December 2, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27910758/antimicrobial-coumarins-from-the-oyster-culinary-medicinal-mushroom-pleurotus-ostreatus-agaricomycetes-from-kenya
#5
Lilechi D Baraza, Wekesa Neser, Korir Cheruiyot Jackson, Juma B Fredrick, Ochieno Dennis, Kamau R Wairimu, Aggrey Osogo Keya, Matthias Heydenreich
Pleurotus ostreatus has been widely used as food because of its nutritional and medicinal properties. These have been attributed to the presence of macronutrients, minerals, vitamins, and amino acids, among other secondary metabolites. There are, however, few reports on the antimicrobial activities of different classes of purified compounds from P. ostreatus. This led to the current study, the objective of which was to chemically characterize the antibiotic activities of P. ostreatus against selected human pathogenic bacteria and endophytic fungi...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27910716/persistent-amenorrhea-and-decreased-dheas-to-cortisol-ratio-after-recovery-from-anorexia-nervosa
#6
Alessandra Andrisani, Chiara Sabbadin, Silvia Minardi, Angela Favaro, Gabriella Donà, Luciana Bordin, Guido Ambrosini, Decio Armanini
Persistent amenorrhea is a frequent condition affecting anorexic patients after stable weight recovery. It has been proposed that it could be due to alterations of the hypothalamic-pituitary-gonadal axis linked with persistent hormonal impairments, such as relative hypercortisolemia and hypoleptinemia, and psychological symptoms related to anorexia nervosa (AN). The aim of our study was to evaluate the metabolic and hormonal pattern involved in the persistence of amenorrhea after recovery from AN. Eight weight-recovered anorexic patients with amenorrhea were investigated and matched with 10 healthy eumenorrhoic women, comparable for age and BMI...
December 2, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27909782/associations-between-serum-vitamin-e-concentration-and-bone-mineral-density-in-the-us-elderly-population
#7
J Zhang, X Hu, J Zhang
: Mixed findings regarding effects of vitamin E on bone metabolism existed. We were the first to find a negative association between serum α-tocopherol concentration and bone mineral density in the US elderly population. Using vitamin E supplement as α-tocopherol to promote bone health was not warranted at this time. INTRODUCTION: The aim of the study is to examine the associations between serum vitamin E (α-tocopherol and γ-tocopherol) status and bone mineral density (BMD) among the US elderly population...
December 1, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27909721/protective-effect-of-vk2-on-glucocorticoid-treated-mc3t3-e1-cells
#8
Yue-Lei Zhang, Jun-Hui Yin, Hao Ding, Wei Zhang, Chang-Qing Zhang, You-Shui Gao
Glucocorticoids (GCs) contribute to the increased incidence of secondary osteoporosis and osteonecrosis, and medications for the prevention and treatment of these complications have been investigated for many years. Vitamin K2 (VK2) has been proven to promote bone formation both in vitro and in vivo. In this study, we examined the effects of VK2 on dexamethasone (DEX)-treated MC3T3-E1 osteoblastic cells. We observed that VK2 promoted the proliferation and enhanced the survival of dexamethasone-treated MC3T3-E1 cells...
December 1, 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27909615/the-histopathological-evaluation-of-healing-effects-of-vitamin-c-administered-before-methotrexate-therapy-on-testicular-injury-induced-by-methotrexate
#9
Aysun Sayılmaz, Yasemin Yuyucu Karabulut, Aydan Özgörgülü
OBJECTIVE: Methotrexate (MTX) leads to acute toxic side effects in tissues or organs containing rapidly dividing cells such as seminiferous tubules. In this study, we investigated the protective effects of vitamin C against MTX-induced injury in rat testis. MATERIAL AND METHODS: A total of 31 rats were divided into 4 groups, including the control group. The study was completed within 4 weeks and the rats received daily doses of 2 mL/kg SF, 100 mg/kg vitamin C and 10 mg/kg/day MTX i...
December 2016: Turkish Journal of Urology
https://www.readbyqxmd.com/read/27909544/reducing-the-risk-of-stroke-in-patients-with-nonvalvular-atrial-fibrillation-with-direct-oral-anticoagulants-is-one-of-these-not-like-the-others
#10
REVIEW
Paul P Dobesh Pharm D, John Fanikos Mba R Ph
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia and increases risk of stroke by nearly 5-fold. While warfarin has been employed successfully to reduce the risk of stroke in these patients, there are a number of challenges with therapy. These include the need for therapeutic monitoring due to variability in patient response, frequent dose adjustments, numerous drug-drug, drug-food, and drug-disease interactions, and a heightened risk of thrombosis and bleeding due to these issues. Current guidelines recommend that the vitamin K antagonists (VKA) or direct oral anticoagulants (DOACs) should be used for thromboprophylaxis in patients with nonvalvular AF at risk for stroke or systemic embolic events...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909542/which-factors-influence-resident-physicians-to-prescribe-noacs-to-patients-with-non-valvular-atrial-fibrillation
#11
Zardasht Oqab Md Frcpc, William F McIntyre Md Frcpc, Wilma M Hopman Ma, Adrian Baranchuk Md Facc Frcp
The Canadian Cardiovascular Society and the European Society of Cardiology recommend the use of non-vitamin K antagonists (NOAC) in preference to warfarin for stroke prevention in most patients with non-valvular atrial fibrillation (AF). The aim of this study was to identify factors that predict selection of a NOAC by resident physicians when faced with patients with non-valvular AF. A web-based survey was distributed to residents across Canada to learn the attitudes and behaviours regarding stroke, bleeding risk and choices of therapy in different clinical scenarios involving the same patient and one additional co-morbidity...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909496/safety-and-efficacy-of-uninterrupted-periprocedural-apixaban-in-patients-undergoing-atrial-fibrillation-catheter-ablation-a-metaanalysis-of-1-057-patients
#12
REVIEW
Jalaj Garg Md Fesc, Rahul Chaudhary Md, Parasuram Krishnamoorthy Md, Neeraj Shah Md, Babak Bozorgnia Md, Andrea Natale Md
Apixaban (factor Xa inhibitor) is a novel anticoagulant and may be beneficial during atrial fibrillation (AF) ablation for prevention of thromboembolic events. However, the adverse effects of periprocedural apixaban therapy have not been thoroughly evaluated. A meta-analysis was performed to evaluate the safety of apixaban for anticoagulation in AF ablation. We searched the online databases till October 2015 for studies comparing Apixaban with Vitamin K antagonists in atrial fibrillation patients undergoing catheter ablation...
April 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27908565/determinants-of-hyperhomocysteinemia-in-healthy-and-hypertensive-subjects-a-population-based-study-and-systematic-review
#13
REVIEW
Liyuan Han, Yanfen Liu, Changyi Wang, Linlin Tang, Xiaoqi Feng, Thomas Astell-Burt, Qi Wen, Donghui Duan, Nanjia Lu, Guodong Xu, Kaiyue Wang, Lu Zhang, Kaibo Gu, Sihan Chen, Jianping Ma, Tao Zhang, Dingyun You, Shiwei Duan
AIMS: Hyperhomocysteinemia (HHcy) is known to increase the risk of many diseases. Factors influencing HHcy in healthy and hypertensive subjects remain under-researched. METHODS: A large population-based study was conducted in 60 communities from Shenzhen, China. Responses to standardized questions on lifestyle factors and blood samples were collected from all participants after a 12-h overnight fast. Multiple linear and multivariate logistic regressions were used to explore risk factors for HHcy...
November 19, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27908415/iodine-in-the-feed-of-cows-and-in-the-milk-with-a-view-to-the-consumer-s-iodine-supply
#14
Friedrich Schöne, Kathrin Spörl, Matthias Leiterer
Milk may be an iodine source for humans, but its magnitude depends on the iodine content of cow feed. The present investigation focused on the iodine level of feed and milk in German feeding practice in comparison with the results of previous milk monitoring and dose-response experiments with dairy cows. In 73 samples of straight feedstuffs (41 concentrates, 32 silages prepared from grass or green maize) and a total of 83 vitamin mineral premixes and compound feeds, respectively, the iodine content was determined and along with the expected daily iodine intake of cows...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908410/elevated-serum-mda-and-depleted-non-enzymatic-antioxidants-macro-minerals-and-trace-elements-are-associated-with-bipolar-disorder
#15
Manjurul Islam Chowdhury, Maimuna Hasan, Mohammad Safiqul Islam, Md Shahid Sarwar, Mohammad Nurul Amin, S M Naim Uddin, Md Zahedur Rahaman, Sujan Banik, Md Saddam Hussain, Kazushige Yokota, Abul Hasnat
Genetic and neurobiological factors are considered to be the major causes of mood and mental disorders. However, over the past few years, increased levels of serum malondialdehyde and altered levels of various non-enzymatic antioxidants and essential minerals involved in abnormal functional activity have been identified as major contributing factors to the pathogenesis of several neurological disorders. The aim of this study was to determine the levels of the serum lipid peroxidation product malondialdehyde (MDA), antioxidants (vitamin A, E and C), macro-minerals (calcium, potassium and sodium) and trace elements (zinc, iron and selenium) in patients with bipolar disorder and to explore their role in disease progression...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908227/improved-infant-hemoglobin-hb-and-blood-glucose-concentrations-the-beneficial-effect-of-maternal-vitamin-a-supplementation-of-malaria-infected-mothers-in-ebonyi-state-nigeria
#16
Michael O Elom, Joseph E Eyo, Fabian C Okafor, Amos Nworie, Victor U Usanga, Gerald N Attamah, Chibueze C Igwe
One hundred and fifty-two malaria-infected pregnant women whose pregnancies had advanced to the 6th month were randomised into two study groups - supplemented and placebo groups, after obtaining their approved consents. Ten thousand international units of vitamin A soft gels were administered to the supplemented group three times per week. Vitamin A soft gels devoid of their active ingredients were administered thrice weekly to the placebo group. Two hundred thousand international units of vitamin A was administered to the supplemented groups within 8 weeks postpartum...
December 1, 2016: Pathogens and Global Health
https://www.readbyqxmd.com/read/27907873/excellent-storage-stability-and-sensitive-detection-of-neurotoxin-quinolinic-acid
#17
Ranjana Singh, Sunayana Kashyap, Suveen Kumar, Shiju Abraham, Tejendra K Gupta, Arvind M Kayastha, Bansi D Malhotra, Preeti Suman Saxena, Anchal Srivastava, Ranjan K Singh
Quinolinic acid (QA) is a metabolite of tryptophan degradation obtained through kynurenine pathway, produced naturally in the mammalian brain as well as in the human cerebrospinal fluid. The presence of QA ~10-40µM is a clear indicator of many neurological disorders as well as deficiency of vitamin B6 in human being. In the present work; rapid, sensitive and cost-effective bio-electrodes were prepared to detect the trace amount of endogenous neurotoxin (QA). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) studies were carried out to measure the electrochemical response of the fabricated bio-electrodes as a function of QA concentrations...
November 23, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27906964/undernutrition-vitamin-a-and-iron-deficiency-are-associated-with-impaired-intestinal-mucosal-permeability-in-young-bangladeshi-children-assessed-by-lactulose-mannitol-test
#18
Md Iqbal Hossain, Rashidul Haque, Dinesh Mondal, Mustafa Mahfuz, Am Shamsir Ahmed, M Munirul Islam, Richard L Guerrant, William A Petri, Tahmeed Ahmed
BACKGROUND: Lactulose/mannitol (L:M) test has been used as a non-invasive marker of intestinal mucosal -integrity and -permeability (enteropathy). We investigated the association of enteropathy with anthropometrics, micronutrient- status, and morbidity in children. METHODS: The urine and blood samples were collected from 925 children aged 6-24 months residing in Mirpur slum of Dhaka, Bangladesh during November 2009 to April 2013. L:M test and micronutrient status were assessed in the laboratory of International Centre for Diarrhoeal Diseases Research, Bangladesh (icddr,b) following standard procedure...
2016: PloS One
https://www.readbyqxmd.com/read/27906918/newborn-vitamin-k-prophylaxis-an-analysis-of-information-resources-for-parents-and-professionals
#19
Hayleigh Miller, Benjamin Wheeler, Nikki Kerruish
AIMS: Vitamin K prophylaxis represents one of the first healthcare decisions families make for their newborn. Information resources are an important component of this process. This study aimed to identify and analyse written information about vitamin K. METHODS: Resources concerning vitamin K prophylaxis for both parents and health professionals were accessed through tertiary hospitals in New Zealand and Australia, midwives associated with Queen Mary Maternity Centre (Dunedin, New Zealand), antenatal class providers in the Dunedin, New Zealand area, and an online search of Australian and New Zealand government and hospital websites, as well as the Centre for Disease Control (CDC) in the US...
December 2, 2016: New Zealand Medical Journal
https://www.readbyqxmd.com/read/27906623/orotate-orotic-acid-an-essential-and-versatile-molecule
#20
M Löffler, E A Carrey, E Zameitat
Orotate (OA) is well-known as a precursor in biosynthesis of pyrimidines; in mammals it is released from the mitochondrial dihydroorotate dehydrogenase (DHODH) for conversion to UMP by the cytoplasmic UMP synthase enzyme. OA is also a normal part of the diet, being found in milk and dairy products, and it is converted to uridine for use in the pyrimidine salvage pathway predominantly in liver, kidney and erythrocytes. Early research into nutrition identified orotate as "vitamin B13," and its use as a complex with organic cations or metal ions was promulgated in body-building, and in assisting therapies of metabolic syndromes...
December 2016: Nucleosides, Nucleotides & Nucleic Acids
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