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Magnesium deficiency

Li-Av Segev-Zarko, Gal Kapach, Michaele Josten, Yoel Alexander Klug, Hans-Georg Sahl, Yechiel Shai
Multidrug resistant bacteria possess various mechanisms that can sense environmental stresses such as antibiotics and antimicrobial peptides, and rapidly respond to defend themselves. Two known defense strategies are biofilm formation and lipopolysaccharide (LPS) modification. Though LPS modifications are observed in biofilm embedded bacteria, their effect on biofilm formation is unknown. Using biochemical and biophysical methods coupled with confocal, atomic force microscopy and transmission electron microscopy, we show that biofilm formation is promoted in a Pseudomonas aeruginosa PAO1 strain with a loss of function mutation in the arnB gene...
March 8, 2018: Biochemistry
Jingshu Xu, Stephanie J Church, Stefano Patassini, Paul Begley, Katherine A B Kellett, Emma R L C Vardy, Richard D Unwin, Nigel M Hooper, Garth J S Cooper
Sporadic Alzheimer's disease (AD) is a neurodegenerative disorder that causes the most prevalent form of age-related dementia but its pathogenesis remains obscure. Altered regulation of metals, particularly pan-cerebral copper deficiency, and more regionally-localized perturbation of other metals, are prominent in AD brain although data on how these CNS perturbations are reflected in the peripheral bloodstream are inconsistent to date. To assess the potential use of metal dysregulation to generate biomarkers in AD, we performed a case-control study of seven essential metals and selenium, measured by inductively coupled plasma mass-spectrometry, in samples from AD and matched control cases...
March 7, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
Christina M Gant, Sabita S Soedamah-Muthu, S Heleen Binnenmars, Stephan J L Bakker, Gerjan Navis, Gozewijn D Laverman
In type 2 diabetes mellitus (T2D), the handling of magnesium is disturbed. Magnesium deficiency may be associated with a higher risk of coronary heart disease (CHD). We investigated the associations between (1) dietary magnesium intake; (2) 24 h urinary magnesium excretion; and (3) plasma magnesium concentration with prevalent CHD in T2D patients. This cross-sectional analysis was performed on baseline data from the DIAbetes and LifEstyle Cohort Twente-1 (DIALECT-1, n = 450, age 63 ± 9 years, 57% men, and diabetes duration of 11 (7-18) years)...
March 5, 2018: Nutrients
Anne Marie Uwitonze, Mohammed S Razzaque
Nutrients usually act in a coordinated manner in the body. Intestinal absorption and subsequent metabolism of a particular nutrient, to a certain extent, is dependent on the availability of other nutrients. Magnesium and vitamin D are 2 essential nutrients that are necessary for the physiologic functions of various organs. Magnesium assists in the activation of vitamin D, which helps regulate calcium and phosphate homeostasis to influence the growth and maintenance of bones. All of the enzymes that metabolize vitamin D seem to require magnesium, which acts as a cofactor in the enzymatic reactions in the liver and kidneys...
March 1, 2018: Journal of the American Osteopathic Association
Tu Hu, Haitao Xu, Chongyang Wang, Hui Qin, Zhiquan An
Magnesium deficiency increases the generation of pro-inflammatory cytokines, which is consistently accompanied by the sensitization of cells such as neutrophils, macrophages and endothelial cells. We investigated the potential of magnesium to regulate macrophage polarization and macrophage-induced inflammation with or without lipopolysaccharide (LPS) and interferon-γ (IFN-γ) activation and further elucidated whether these effects impact the inhibitory functions of activated macrophage-induced inflammation on cartilage regeneration...
February 21, 2018: Scientific Reports
Prabha Nini Gupta, Subair M Kunju, Baiju Rajan, A George Koshy, Sunitha Vishwanathan, Preeti Sara George, Praveen Velappan
OBJECTIVES: To compare the clinical presentation, clinical profile and survival of two groups of endomyocardial fibrosis patients. METHODS: The study was a prospective cohort study, or a prospective case series, comparing all consecutive echocardiographically proven patients with endomyocardial fibrosis seen in Medical College Trivandrum with the patients seen in Medical College Hospital, Alappuzha(Alleppey) (or TD Medical College). In all patients the clinical details like age, sex, type of endomyocardial fibrosis, the presence of anaemia, eosinophilia, neutrophilia and type of rhythm(Sinus or atrial fibrillation) etc were compared by both simple X2 and by Kaplan Meier survival curves...
January 2018: Indian Heart Journal
Mei Shigematsu, Shozo Tomonaga, Fumie Shimokawa, Masaru Murakami, Toru Imamura, Tohru Matsui, Masayuki Funaba
The liver is the organ that responds to nutritional disturbances including magnesium deficiency. The present study evaluated cellular responses to magnesium deficiency using model cells of the liver, namely, HepG2 cells as hepatocytes, RAW264.7 cells as Kupffer cells and human umbilical vein endothelial cells (HUVECs) as vascular endothelial cells; we examined effects of culture with magnesium deficient medium on cell responses in individual types of cells as well as interactive responses among cells. Metabolomic analyses indicated that magnesium deficiency differentially affected the cellular content of metabolites among HepG2 cells, RAW264...
February 2, 2018: Journal of Nutritional Biochemistry
Masafumi Kurajoh, Keiko Ohsugi, Miki Kakutani-Hatayama, Takuhito Shoji, Hidenori Koyama
Hypokalemia and hypomagnesemia are frequently observed in patients with chronic alcoholism. However, the involvement of deranged cortisol regulation in patients with those conditions has not been reported. A 63-year-old Japanese male with chronic alcoholism was referred to the Department of Diabetes, Endocrinology and Metabolism for examination and treatment of hypokalemic periodic paralysis. Laboratory findings showed hypokalemia (2.3 mmol/l), as well as a high level of urinary excretion of potassium and hypomagnesemia (1...
February 15, 2018: CEN Case Reports
Amy Louise Ross Russell, Martin Prevett, Paul Cook, Charles Simon Barker, Ashwin Arnold Pinto
Magnesium is the second most abundant intracellular cation. Deficiency can cause several neurological complications, including cerebellar syndromes, with various MRI findings. These include cerebellar oedema, presumably through a similar mechanism to that in posterior reversible encephalopathy syndrome (PRES). People particularly vulnerable to deficiency include those with high alcohol consumption, excessive loss due to gastrointestinal pathology and those taking certain medications, including proton pump inhibitors...
February 15, 2018: Practical Neurology
Seyed Hossein Ardehali, Salman Dehghan, Ahmad Reza Baghestani, Aynaz Velayati, Zahra Vahdat Shariatpanahi
To evaluate the association of admission serum levels of 25(OH)D, parathormone and the related electrolytes with severity of illness and clinical outcomes in neurosurgical critically ill patients, serum levels of 25(OH)D, parathormone, calcium, magnesium, and phosphate, along with APACHE II score were measured for 210 patients upon admission. Mean serum 25(OH)D was 21.1 ± 7.4 ng/mL. 25(OH)D deficiency (less than 20 ng/dL) and elevated serum parathormone level were found in 47.6% and 38% of patients respectively...
February 14, 2018: Scientific Reports
R Jayasree, K Madhumathi, Deepti Rana, Murugan Ramalingam, Rakesh P Nankar, Mukesh Doble, T S Sampath Kumar
Carbonated apatite has a chemical composition quite similar to biological apatite found in native bone. The incorporation of carbonate (CO2-3) ions groups into the apatitic crystal structure can tailor its crystallinity, solubility and biological activity that benefit the bone repair and regeneration. In this study, we report a simple and elegant method of synthesizing carbonated calcium deficient hydroxyapatite (ECCDHA) nanoparticles from egg shell wastes and its efficacy has been compared with synthetic calcium deficient hydroxyapatite (SCDHA) nanoparticles...
April 1, 2018: Journal of Nanoscience and Nanotechnology
Emel Timucin, Osman Ugur Sezerman
Magnesium deficiency increases susceptibility of plants towards heat stress. The correlation between magnesium levels and stress response has been studied at the physiological level, albeit the molecular explanation to this relationship remains elusive. Among diverse pathways implicated in the heat stress, the abscisic acid (ABA) signal modulates the heat stress response by magnesium dependent phosphatases (PP2Cs). Exclusively, sequestration of PP2Cs by ABA receptors (PYLs) in the heterodimer form activates the stress response through ABA responsive transcription factors...
February 13, 2018: Journal of Chemical Information and Modeling
So-Hee Lee, Woo-Jung Song, Heung-Woo Park, Min-Gyu Kang, Sae-Hoon Kim, Hye-Kyung Park, Sang-Heon Kim, Yong-Eun Kwon, Tae-Bum Kim, Byung-Jae Lee, Young-Koo Jee, Byung-Whui Choi, Sang-Heon Cho, Sun-Sin Kim
Background: Although many risk factors are known to be associated with poor asthma outcomes in the elderly, the literature on the effect of risk factor control on asthma outcomes in the elderly is very sparse. Objective: To evaluate the role of multifaceted interventions in reducing acute exacerbations in elderly asthmatics. Methods: A total of 100 subjects were randomly selected from our prospective cohort of elderly asthmatics aged 65 years or older and were provided multifaceted intervention for 1 year...
January 2018: Asia Pacific Allergy
Shamshad Karatela, Neil I Ward, Irene Suilan Zeng, Janis Paterson
OBJECTIVE: Elemental deficiencies or in excess effects growth and development. Pacific population are at a disadvantage due to food insecurity as compared to New Zealand European households. This study aims to evaluate the status and interrelationship of elements (essential, non-essential and toxic) in nine-year-old Pacific children who were part of the Pacific Island Families Study living in New Zealand. MATERIALS AND METHODS: This observational study included 278 eligible nine-year-old children...
March 2018: Journal of Trace Elements in Medicine and Biology
Khursheed N Jeejeebhoy, Donald R Duerksen
All patients with significant gastrointestinal disease should be clinically assessed for protein calorie malnutrition by using the Subjective Global Assessment. Blood tests for anemia, electrolytes, calcium, phosphorus, magnesium, ferritin, vitamin B12 , and folate should be considered for assessment of major micronutrients. Where malabsorption or inflammatory bowel disease is diagnosed, bone mineral density using dual beam x-ray absorptiometry, 25-OH vitamin D levels, and measurement of other vitamins and trace elements should be considered...
March 2018: Gastroenterology Clinics of North America
Konrad Neugebauer, Martin R Broadley, Hamed A El-Serehy, Timothy S George, James W McNicol, Milton Ferreira de Moraes, Philip J White
The ionome is defined as the elemental composition of a subcellular structure, cell, tissue, organ or organism. The subset of the ionome comprising mineral nutrients is termed the functional ionome. A 'standard functional ionome' of leaves of an 'average' angiosperm, defined as the nutrient composition of leaves when growth is not limited by mineral nutrients, is presented and can be used to compare the effects of environment and genetics on plant nutrition. The leaf ionome of a plant is influenced by interactions between its environment and genetics...
February 7, 2018: Physiologia Plantarum
Forrest H Nielsen
Animal studies have shown that magnesium deficiency induces an inflammatory response that results in leukocyte and macrophage activation, release of inflammatory cytokines and acute-phase proteins, and excessive production of free radicals. Animal and in vitro studies indicate that the primary mechanism through which magnesium deficiency has this effect is through increasing cellular Ca2+, which is the signal that results in the priming of cells to give the inflammatory response. Primary pro-inflammatory cytokines such as tumor necrosis factor-α and interleukin (IL)-1; the messenger cytokine IL-6; cytokine responders E-selectin, intracellular adhesion molecule-1 and vascular cell adhesion molecule-1; and acute-phase reactants C-reactive protein and fibrinogen have been determined to associate magnesium deficiency with chronic low-grade inflammation (inflammatory stress)...
2018: Journal of Inflammation Research
Xiao Sun, Jihui Chen, Lisheng Liu, Andrea Rosanoff, Xue Xiong, Yingjun Zhang, Tongtong Pei
Magnesium (Mg) is important for both plant photosynthesis and protein-synthesis. Nevertheless, latent Mg deficiencies are common, and Mg addition has shown improved yield. Might such increasing yield cause "hidden" hunger for microelements and protein, and if so, what is the mechanism? We conducted two greenhouse experiments using low-Mg soil to investigate: (i) effects of 5 levels of Mg fertilizer (20 to 400 mg kg-1) on 8 elements and crude protein concentrations in annual ryegrass and perennial white clover; (ii) if any protein effects of Mg fertilizer depend on soil nitrogen (N)...
February 5, 2018: Journal of Agricultural and Food Chemistry
Hua Gao, Mai Yang, Haitao Yang, Yue Qin, Biyun Zhu, Gang Xu, Chengyuan Xie, Dewei Wu, Xiaolin Zhang, Wanxiang Li, Jianbin Yan, Susheng Song, Tiancong Qi, Shou-Wei Ding, Daoxin Xie
Viruses can infect host plants to cause severe diseases and substantial agricultural loss, while plants have evolved RNA interference (RNAi) strategy to defend against viral infection. Despite enormous efforts, only a few host proteins in RNAi pathway were shown to mediate antiviral defense, including RNA-dependent RNA polymerase 1 (RDR1), RDR6, DICER-LIKE 2 (DCL2) and DCL4. In this study, we carried out a genetic screen for antiviral factors of RNAi pathway in Arabidopsis rdr6 background via inoculation with a 2b-deficient Cucumber Mosaic Virus (CMV-Δ2b)...
December 24, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
James J DiNicolantonio, James H O'Keefe, William Wilson
Because serum magnesium does not reflect intracellular magnesium, the latter making up more than 99% of total body magnesium, most cases of magnesium deficiency are undiagnosed. Furthermore, because of chronic diseases, medications, decreases in food crop magnesium contents, and the availability of refined and processed foods, the vast majority of people in modern societies are at risk for magnesium deficiency. Certain individuals will need to supplement with magnesium in order to prevent suboptimal magnesium deficiency, especially if trying to obtain an optimal magnesium status to prevent chronic disease...
2018: Open Heart
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