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Vitamin absorption

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https://www.readbyqxmd.com/read/29474746/a-systematic-review-of-the-evidence-and-analysis-of-the-consequences
#1
REVIEW
J-Matthias Löhr, Nikola Panic, Miroslav Vujasinovic, Caroline S Verbeke
Senior people constitute the fastest growing segment of the population. The elderly are at risk for malnutrition, thought to be caused by reduced food intake or involution of the physiological capacity of the GI tract. Age-related changes are well known in other secretory organs such as liver, kidney, and intestine. The pancreas, representing a metabolically active organ with uptake and breakdown of essential nutritional components, changes its morphology and function with age. During childhood, the volume of the pancreas increases, reaching a plateau between 20-60 years, and declines thereafter...
February 23, 2018: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29473853/antioxidant-tocols-as-radiation-countermeasures-challenges-to-be-addressed-to-use-tocols-as-radiation-countermeasures-in-humans
#2
REVIEW
Ujwani Nukala, Shraddha Thakkar, Kimberly J Krager, Philip J Breen, Cesar M Compadre, Nukhet Aykin-Burns
Radiation countermeasures fall under three categories, radiation protectors, radiation mitigators, and radiation therapeutics. Radiation protectors are agents that are administered before radiation exposure to protect from radiation-induced injuries by numerous mechanisms, including scavenging free radicals that are generated by initial radiochemical events. Radiation mitigators are agents that are administered after the exposure of radiation but before the onset of symptoms by accelerating the recovery and repair from radiation-induced injuries...
February 23, 2018: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29452153/functionalization-of-nanodiamond-with-vitamin-e-tpgs-to-facilitate-oral-absorption-of-curcumin
#3
Bingchao Cheng, Hao Pan, Dandan Liu, Dongyang Li, Jinyu Li, Shihui Yu, Guoxin Tan, Weisan Pan
The purpose of this work was to develop a D-α-tocopherol polyethylene glycol 1000 succinate (TPGS) decorated nanodiamond (ND) system loading water-insoluble curcumin (ND/CUR/TPGS) to improve the colloidal dispersity and oral bioavailability of the preparation. CUR was physically loaded into ND clusters, then TPGS was coated to the ND/CUR complex forming amorphous nanostructure on the interparticle nanocage of the ND substrate. The formulation of the nanocomplexes was optimized using response surface methodology, and the optimal ND/CUR/TPGS showed small particle size (196...
February 13, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29428098/pathophysiological-consequences-of-obstructive-jaundice-and-perioperative-management
#4
REVIEW
Efstathios T Pavlidis, Theodoros E Pavlidis
BACKGROUND: Obstructive jaundice is a common problem in daily clinical practice. Understanding completely the pathophysiological changes in obstructive jaundice remains a challenge for planning current and future management. DATA SOURCES: A PubMed was searched for relevant articles published up to August 2016. The effect of obstructive jaundice on proinflammatory cytokines, coagulation status, hemodynamics and organ functions were evaluated. RESULTS: The effects of obstructive jaundice included biliary tree, the hepatic cell and liver function as well as systemic complications...
February 2018: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/29425476/scottsdale-magnesium-study-absorption-cellular-uptake-and-clinical-effectiveness-of-a-timed-release-magnesium-supplement-in-a-standard-adult-clinical-population
#5
Decker Weiss, Debra K Brunk, Dennis A Goodman
OBJECTIVE: Suboptimal magnesium status is likely widespread in the United States and increasing evidence links it to many chronic diseases. Therapeutically addressing magnesium status can be challenging, as higher supplementation often leads to bowel intolerance. This study evaluated the absorption, cellular uptake, and clinical effectiveness of a timed-release formulation containing dimagnesium malate with vitamins B6, B12, and folate (MagSRT™) in a standard clinical population. METHODS: A standard clinical population of 91 adults participated in a placebo-controlled study carried out at two clinics; 53 individuals received MagSRT™, containing 500 mg dimagnesium malate and vitamins B6, B12, and folate, while the remaining individuals received a placebo...
February 9, 2018: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/29423207/old-and-new-calcimimetics-for-treatment-of-secondary-hyperparathyroidism-impact-on-biochemical-and-relevant-clinical-outcomes
#6
Luciano Pereira, Catarina Meng, Daniela Marques, João M Frazão
Secondary hyperparathyroidism (SHPT) is associated with increased bone turnover, risk of fractures, vascular calcifications, and cardiovascular and all-cause mortality. The classical treatment for SHPT includes active vitamin D compounds and phosphate binders. However, achieving the optimal laboratory targets is often difficult because vitamin D sterols suppress parathyroid hormone (PTH) secretion, while also promoting calcium and phosphate intestinal absorption. Calcimimetics increase the sensitivity of the calcium-sensing receptor, so that even with lower levels of extracellular calcium a signal can still exist, leading to a decrease of the set-point for systemic calcium homeostasis...
February 2018: Clinical Kidney Journal
https://www.readbyqxmd.com/read/29416583/assessment-of-serum-vitamin-b12-levels-and-other-metabolic-parameters-in-subjects-with-different-values-of-bone-mineral-density
#7
Marianna Renis, Debora Lobreglio, Pierpaolo Congedo, Maria Concetta Montinaro, Maurizio Muratore, Giambattista Lobreglio
Background: Controversial experimental and clinical evidences have raised questions regarding the role of B12 and insulin-like growth factor 1 (IGF-1) on osteoblast function and bone health. In this study, we aimed to determine if the serum levels of B12, IGF-1 and procollagen type 1 N-terminal propeptide (P1NP) are associated with different degrees of bone mineral density (BMD). Methods: A total of 287 subjects (190 women and 97 men; mean age 53 years) volunteered for evaluation of BMD and serum levels of B12, IGF-1 and P1NP; BMD at lumbar spine and proximal femur was evaluated by means of dual-energy X-ray absorption (DEXA) and expressed as T-score; serum concentrations of vitamin B12 and IGF1 were measured with a chemiluminescent immunoassay on Access II Beckman Coulter and DiaSorin Liaison XL analyzers, respectively; P1NP was assessed in 61 women and 35 men with reduced T-score on Roche Modular platform...
March 2018: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29412903/sucrose-capped-gold-nanoparticles-as-a-plasmonic-chemical-sensor-based-on-non-covalent-interactions-application-for-selective-detection-of-vitamins-b1-and-b6-in-brown-and-white-rice-food-samples
#8
Kamlesh Shrivas, Nidhi Nirmalkar, Santosh Singh Thakur, Manas Kanti Deb, Sandip S Shinde, Ravi Shankar
We report simple and selective method for detection of vitamins B1 and B6 in brown and white rice samples using localized surface plasmon resonance (LSPR) of sucrose capped gold nanoparticles (AuNPs) as a chemical sensor colorimetrically. Here, detection is based on the color change of AuNPs from pink to blue followed by a red shift of LSPR absorption band in UV-vis region with the addition of vitamins B1 and B6 into the NPs solution. A good linear range was observed in the range of 25-1000 ngmL-1 with detection limit of 8 ngmL-1 for B1 and 50-1000 ngmL-1 with detection limit of 15 ngmL-1 for vitamins B6...
June 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29407923/identification-of-menaquinones-vitamin-k2-homologues-as-novel-constituents-of-honey
#9
Linda Kim, Katrina Brudzynski
Our recent research indicated that honey active macromolecules form colloidal particles that scatter the light and produce elaborate UV spectral profile dominated by double absorption peaks at 240-250 nm. The absorption at 240-250 nm signified the stable honey conformation that supported antibacterial activity and hydrogen peroxide production. Our aim was to identify the bioactive constituent relevant to this absorption. The methodology included activity-guided fractionation of honey through size-exclusion chromatography, solid-phase extraction and UPLC-UV-MS...
May 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29403195/vitamin-d-and-gastrointestinal-cancer
#10
REVIEW
Ashish Mahendra, Karishma, Basanta Kumar Choudhury, Tamanna Sharma, Neha Bansal, Richa Bansal, Shivangi Gupta
Vitamin D serves as a precursor to the potent steroid hormone calcitriol, which has widespread actions throughout the body. Calcitriol regulates numerous cellular pathways that could have a role in determining cancer risk and prognosis. Low Vitamin D levels have been implicated in numerous disease processes including fracture risk, falls, cardiovascular disease, hypertension, diabetes mellitus, and cancers. Metabolite of 1, 25-dihydroxyvitamin D3 (1,25[OH]2D3) regulates numerous genes that control gut physiology and homeostasis...
January 2018: Journal of Laboratory Physicians
https://www.readbyqxmd.com/read/29387383/nutritional-physicochemical-and-functional-properties-of-protein-concentrate-and-isolate-of-newly-developed-bambara-groundnut-vigna-subterrenea-l-cultivars
#11
Olaposi R Adeleke, Oladipupo Q Adiamo, Olumide S Fawale
Bambara groundnut is an indigenous African vegetable grown mainly for human food and animal feed due to its high protein content. Different factors like varieties and origin can influence the chemical composition of Bambara groundnut cultivars. Therefore, the aims of this study are to produce defatted flour and protein concentrate from newly developed Bambara groundnut cultivars [Accessions No: TVSU 5 - Bambara Groundnut White (BGW) and TVSU 146 - Bambara Groundnut Brown (BGB)] and compare their nutritional, physicochemical, and functional properties with market sample [Bambara groundnut commercial (BGC)]...
January 2018: Food Science & Nutrition
https://www.readbyqxmd.com/read/29381780/x-linked-hypophosphatemia-and-fgf23-related-hypophosphatemic-diseases-prospect-for-new-treatment
#12
Yuka Kinoshita, Seiji Fukumoto
Phosphate plays essential roles in many biological processes, and the serum phosphate level is tightly controlled. Chronic hypophosphatemia causes impaired mineralization of the bone matrix and results in rickets and osteomalacia. Fibroblast growth factor 23 (FGF23) is a bone-derived hormone that regulates phosphate metabolism. FGF23 excess induces hypophosphatemia via impaired phosphate reabsorption in the renal proximal tubules and decreased phosphate absorption in the intestines. There are several types of genetic and acquired form of FGF23-related hypophosphatemic diseases...
January 26, 2018: Endocrine Reviews
https://www.readbyqxmd.com/read/29361736/route-and-type-of-formulation-administered-influences-the-absorption-and-disposition-of-vitamin-b12-levels-in-serum
#13
Luis Vitetta, Joyce Zhou, Rachel Manuel, Serena Dal Forno, Sean Hall, David Rutolo
The administration of biological compounds that optimize health benefits is an ever-evolving therapeutic goal. Pharmaceutical and other adjunctive biological compounds have been administered via many different routes in order to produce a systemic pharmacological effect. The article summarizes the findings from an Australian comparative study in adults administered vitamin B12 through different oral delivery platforms. A total of 16 subjects (9 males, 7 females) voluntarily partook in a comparative clinical study of five different vitamin B12 formulations across a six-month period, completing 474 person-hours of cumulative contribution, that was equivalent to an n = 60 participation...
January 21, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29360830/effects-of-dietary-supplementation-of-arginine-silicate-inositol-complex-on-absorption-and-metabolism-of-calcium-of-laying-hens
#14
Kazim Sahin, Cemal Orhan, Mehmet Tuzcu, Armagan Hayirli, James R Komorowski, Nurhan Sahin
The effects of supplementation of arginine-silicate-inositol complex (ASI; 49.5-8.2-25 g/kg, respectively) to laying hens were investigated with respect to eggshell quality, calcium (Ca) balance, and expression of duodenal proteins related to Ca metabolism (calbindin and tight junction proteins). A total of 360 laying hens, 25 weeks old, were divided into 3 groups consisting of 6 replicate of cages, 20 birds per cage. The groups were fed a basal diet and the basal diet supplemented with 500 or 1000 mg ASI complex per kilogram for 90 days...
2018: PloS One
https://www.readbyqxmd.com/read/29346788/vitamin-d-classic-and-novel-actions
#15
Ángel Gil, Julio Plaza-Diaz, María Dolores Mesa
BACKGROUND: Classically, vitamin D has been implicated in bone health by promoting calcium absorption in the gut and maintenance of serum calcium and phosphate concentrations, as well as by its action on bone growth and reorganization through the action of osteoblasts and osteoclasts cells. However, in the last 2 decades, novel actions of vitamin D have been discovered. The present report summarizes both classic and novel actions of vitamin D. SUMMARY: 1,25(OH)2 vitamin D, the active metabolite of vitamin D, also known as calcitriol, regulates not only calcium and phosphate homeostasis but also cell proliferation and differentiation, and has a key a role to play in the responses of the immune and nervous systems...
January 18, 2018: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/29338739/interventions-for-preventing-or-treating-malnutrition-in-homeless-problem-drinkers-a-systematic-review
#16
REVIEW
Sharea Ijaz, Helen Thorley, Katie Porter, Clare Fleming, Tim Jones, Joanna Kesten, Loubaba Mamluk, Alison Richards, Elsa M R Marques, Jelena Savović
BACKGROUND: Excessive drinking leads to poor absorption of nutrients and homeless problem-drinkers often have nutritionally inadequate diets. Depletion of nutrients such as vitamin B1 can lead to cognitive impairment, which can hinder efforts to reduce drinking or engage with services. This review aimed to assess effectiveness of interventions designed to prevent or treat malnutrition in homeless problem-drinkers. METHODS: We systematically searched nine electronic databases and 13 grey literature sources for studies evaluating interventions to improve nutrition in homeless populations, without regional or language restrictions...
January 16, 2018: International Journal for Equity in Health
https://www.readbyqxmd.com/read/29330224/vitamin-d-ameliorates-impaired-wound-healing-in-streptozotocin-induced-diabetic-mice-by-suppressing-nf-%C3%AE%C2%BAb-mediated-inflammatory-genes-expression
#17
Yifeng Yuan, Sushant K Das, MaoQuan Li
[Background] : Diabetic wounds are characterized by delayed wound healing due to persistent inflammation and excessive production of reactive oxygen species. Vitamin D, which is well acknowledged as enhanced intestinal calcium absorption and increase in plasma calcium level, has recently been shown to display beneficial effects in various vascular diseases by promoting angiogenesis and inhibiting inflammatory responses. However the role of Vitamin Din diabetic wound healing is still unclear. [Materials and Methods] : In the present study, we investigated the role of Vitamin D in cutaneous wound healing in streptozotocin (STZ) induced diabetic mice...
January 12, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29323251/vitamin-e-inhibits-the-uvai-induction-of-light-and-dark-cyclobutane-pyrimidine-dimers-and-oxidatively-generated-dna-damage-in-keratinocytes
#18
George J Delinasios, Mahsa Karbaschi, Marcus S Cooke, Antony R Young
Solar ultraviolet radiation (UVR)-induced DNA damage has acute, and long-term adverse effects in the skin. This damage arises directly by absorption of UVR, and indirectly via photosensitization reactions. The aim of the present study was to assess the effects of vitamin E on UVAI-induced DNA damage in keratinocytes in vitro. Incubation with vitamin E before UVAI exposure decreased the formation of oxidized purines (with a decrease in intracellular oxidizing species), and cyclobutane pyrimidine dimers (CPD)...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29322299/serum-parathyroid-hormone-and-25-hydroxyvitamin-d-concentrations-before-and-after-biliopancreatic-diversion
#19
Vanessa Tardio, Jean-Philippe Blais, Anne-Sophie Julien, Pierre Douville, Stefane Lebel, Laurent Biertho, Simon Marceau, Frédéric-Simon Hould, Claudia Gagnon
BACKGROUND: Biliopancreatic diversion with duodenal switch (BPD-DS) decreases vitamin D and calcium absorption, which may result in secondary hyperparathyroidism. This study aimed at evaluating the prevalence of vitamin D deficiency and secondary hyperparathyroidism before and after BPD-DS. METHODS: A retrospective analysis of patients who had undergone BPD-DS at a tertiary bariatric center between 2003 and 2010 and for whom simultaneous measurements of serum 25-hydroxyvitamin D and parathyroid hormone were available within 5 years post-op was performed...
January 10, 2018: Obesity Surgery
https://www.readbyqxmd.com/read/29319834/nordiska-riktlinjer-f%C3%A3-r-kosttillskott-och-uppf%C3%A3-ljning-efter-obesitaskirurgi-monitorering-och-supplementering-med-vitaminer-och-mineraler
#20
Anna Laurenius, Ingmar Näslund, Jorunn Sandvik, Per Videhult, Mikael Wirén
Each year 6,800 bariatric operations are performed in Sweden. Bariatric surgery involves both a reduced intake and a reduced absorption of vitamins and minerals. There has been debate about whose responsibility long-term follow-up is, particularly regarding monitoring vitamin and mineral status. The Swedish Society for Bariatric Surgery and the Norwegian Association for Bariatric Surgery, who oversee their respective national quality registers, have appointed an expert group to develop guidelines for postoperative supplementation and nutritional monitoring of vitamins and minerals, along with a schedule for routine follow-up...
January 9, 2018: Läkartidningen
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