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Water homeostasys

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https://www.readbyqxmd.com/read/28346473/oral-administration-of-bifidobacterium-bifidum-g9-1-alleviates-rotavirus-gastroenteritis-through-regulation-of-intestinal-homeostasis-by-inducing-mucosal-protective-factors
#1
Tomohiro Kawahara, Yutaka Makizaki, Yosuke Oikawa, Yoshiki Tanaka, Ayako Maeda, Masaki Shimakawa, Satoshi Komoto, Kyoko Moriguchi, Hiroshi Ohno, Koki Taniguchi
Human rotavirus (RV) infection is a leading cause of dehydrating diarrhea in infants and young children worldwide. Since therapeutic approaches to RV gastroenteritis are limited to alleviation of dehydration with oral rehydration solutions, more direct approaches to palliate symptoms of RV gastroenteritis are required. Treatments with probiotics have been increasingly recognized as alternative safe and low cost treatments for moderate infectious diarrhea. In this study, Bifidobacterium bifidum G9-1 (BBG9-1), which has been used as an intestinal drug for several decades, was shown to have a remarkable protective effect against RV gastroenteritis in a suckling mice model...
2017: PloS One
https://www.readbyqxmd.com/read/28343563/effect-of-thermal-exposure-on-physiological-adaptability-and-seminal-attributes-of-rams-under-semi-arid-environment
#2
Kalyan De, Davendra Kumar, Krishnappa Balaganur, Vijay Kumar Saxena, Palanisamy Thirumurugan, Syed Mohammed Khursheed Naqvi
Thermal stress in hot semi-arid environment is a major limitation of sheep production in tropical and sub-tropical climatic condition. The animals tend to maintain homeostasis through physiological adjustments in a hot environment (maximum temperature reaches up to 47.5°C). Therefore, the present study was carried out to assess the effect of thermal exposure on physiological adaptability and seminal attributes of rams under semi-arid environment. The experiment was conducted for eight weeks involving sixteen Malpura crossbred rams (GMM: Garole X Malpura X Malpura)...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28341892/aquaporin-4-forms-a-macromolecular-complex-with-glutamate-transporter-1-and-mu-opioid-receptor-in-astrocytes-and-participates-in-morphine-dependence
#3
Hui Wang, Shiqi Wang, Kang Zhang, Hua Wang, Liting Lan, Xiaoyun Ma, Xiaoyan Liu, Shuzhuo Zhang, Jianquan Zheng, Xiaoli Wei, Haitao Yan
The water channel aquaporin 4 (AQP4) is abundantly expressed in astrocytes and provides a mechanism by which water permeability of the plasma membrane can be regulated. Evidence suggests that AQP4 is associated with glutamate transporter-1 (GLT-1) for glutamate clearance and contributes to morphine dependence. Previous studies show that AQP4 deficiency changed the mu opioid receptor expression and opioid receptors' characteristics as well. In this study, we focused on whether AQP4 could form macromolecular complex with GLT-1 and mu opioid receptor (MOR) and participates in morphine dependence...
March 24, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28339032/clc-7-ostm1-contribute-to-the-ability-of-tea-polyphenols-to-maintain-bone-homeostasis-in-c57bl-6-mice-protecting-against-fluorosis
#4
Bing-Yun Li, Yan-Hui Gao, Jun-Rui Pei, Yan-Mei Yang, Wei Zhang, Dian-Jun Sun
Epidemiological investigations indicate that certain ingredients in tea bricks can antagonize the adverse effects of fluoride. Tea polyphenols (TPs), the most bioactive ingredient in tea bricks, have been demonstrated to be potent bone-supporting agents. ClC‑7 is known to be crucial for osteoclast (OC) bone resorption. Thus, in this study, we investigated the potential protective effects of TPs against fluorosis using a mouse model and explored the underlying mechanisms with particular focus on ClC‑7...
March 22, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28338609/ectopic-expression-of-aeluropus-littoralis-plasma-membrane-protein-gene-altmp1-confers-abiotic-stress-tolerance-in-transgenic-tobacco-by-improving-water-status-and-cation-homeostasis
#5
Walid Ben Romdhane, Rania Ben-Saad, Donaldo Meynard, Jean-Luc Verdeil, Jalel Azaza, Nabil Zouari, Lotfi Fki, Emmanuel Guiderdoni, Abdullah Al-Doss, Afif Hassairi
We report here the isolation and functional analysis of AlTMP1 gene encoding a member of the PMP3 protein family. In Aeluropus littoralis, AlTMP1 is highly induced by abscisic acid (ABA), cold, salt, and osmotic stresses. Transgenic tobacco expressing AlTMP1 exhibited enhanced tolerance to salt, osmotic, H₂O₂, heat and freezing stresses at the seedling stage. Under greenhouse conditions, the transgenic plants showed a higher level of tolerance to drought than to salinity. Noteworthy, AlTMP1 plants yielded two- and five-fold more seeds than non-transgenic plants (NT) under salt and drought stresses, respectively...
March 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28336824/-the-functions-of-calcium-sensing-receptor-in-regulating-mineral-metabolism
#6
Yuka Kinoshita
Calcium-sensing receptor(CaSR)which belongs to a G protein-coupled receptor family is one of the key elements in regulating calcium homeostasis. CaSR has been identified as a receptor to control parathyroid hormone(PTH)secretion in parathyroid glands according to serum calcium ion(Ca2+)levels. It has also been shown that CaSR controls reabsorption of water and several cations including Ca2+and magnesium ion(Mg2+)in renal tubular cells. This review summarizes the functions and roles of CaSR in mineral metabolism that are exerted in parathyroid glands, kidney, and intestine...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28335864/using-zebrafish-to-study-kidney-development-and-disease
#7
Stephanie Jerman, Zhaoxia Sun
The kidneys are a crucial pair of organs that are responsible for filtering the blood to remove waste, maintain electrolyte and water homeostasis, and regulate blood pressure. There are a number of factors, both genetic and environmental, that can impair the function of the kidneys resulting in significant morbidity and mortality for millions of people affected by kidney disease worldwide. The zebrafish, Danio rerio, has emerged as an attractive vertebrate model in the study of kidney development and disease and has proven to be a powerful tool in the advancement of how kidney development occurs in vertebrates and how the kidney repairs itself after injury...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28335828/dha-brain-uptake-and-apoe4-status-a-pet-study-with-1-11-c-dha
#8
Hussein N Yassine, Etienne Croteau, Varun Rawat, Joseph R Hibbeln, Stanley I Rapoport, Stephen C Cunnane, John C Umhau
BACKGROUND: The apolipoprotein E ɛ4 (APOE4) allele is the strongest genetic risk factor identified for developing Alzheimer's disease (AD). Among brain lipids, alteration in the ω-3 polyunsaturated fatty acid docosahexaenoic acid (DHA) homeostasis is implicated in AD pathogenesis. APOE4 may influence both brain DHA metabolism and cognitive outcomes. METHODS: Using positron emission tomography, regional incorporation coefficients (k*), rates of DHA incorporation from plasma into the brain using [1-(11)C]-DHA (J in), and regional cerebral blood flow using [(15)O]-water were measured in 22 middle-aged healthy adults (mean age 35 years, range 19-65 years)...
March 23, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28333068/effects-of-reactive-oxygen-species-on-tubular-transport-along-the-nephron
#9
REVIEW
Agustin Gonzalez-Vicente, Jeffrey L Garvin
Reactive oxygen species (ROS) are oxygen-containing molecules naturally occurring in both inorganic and biological chemical systems. Due to their high reactivity and potentially damaging effects to biomolecules, cells express a battery of enzymes to rapidly metabolize them to innocuous intermediaries. Initially, ROS were considered by biologists as dangerous byproducts of respiration capable of causing oxidative stress, a condition in which overproduction of ROS leads to a reduction in protective molecules and enzymes and consequent damage to lipids, proteins, and DNA...
March 23, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28331059/adaptive-changes-in-gfr-tubular-morphology-and-transport-in-subtotal-nephrectomized-kidneys-modeling-and-analysis
#10
Anita T Layton, Aurélie Edwards, Volker Vallon
Removal of renal mass stimulates anatomical and functional adaptations in the surviving nephrons, including elevation in single-nephron glomerular filtration rate (SNGFR) and tubular hypertrophy. A goal of this study is to assess the extent to which the concomitant increases in filtered load and tubular transport capacity preserve homeostasis of water and salt. To accomplish that goal, we developed computational models to simulate solute transport and metabolism along nephron populations in a uninephrectomized (UNX) rat and a 5/6-nephrectomized (5/6-NX) rat...
March 22, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28323996/molecular-physiology-of-the-hypocalcemic-action-of-fibroblast-growth-factor-23-in-zebrafish-danio-rerio
#11
Chia-Hao Lin, Huei-Jyun Hu, Pung-Pung Hwang
Fibroblast growth factor 23 (FGF23), a hormone required for phosphorus metabolism, was recently proposed to act on Ca2+ uptake; however, the available evidences of how FGF23 controls the body fluid Ca2+ homeostasis needs to be further clarified. The use of zebrafish as a model system revealed that FGF23 is specifically expressed in the corpuscles of Stannius (CS), an organ involved in Ca2+ homeostasis in fish, and its expression is stimulated by ambient water with a high Ca2+ level. The overexpression of FGF23 inhibited Ca2+ uptake by downregulating the mRNA expression of epithelium calcium channel (ECaC)...
March 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28322358/inhibitory-effects-of-nitrite-on-acid-%C3%A2-production-in-dental-plaque-in-children
#12
Yuji Yamamoto, Jumpei Washio, Koichi Shimizu, Koei Igarashi, Nobuhiro Takahashi
PURPOSE: To assess the inhibitory effects of nitrite on plaque acidogenicity and its relationship with caries experience. MATERIALS AND METHODS: Plaque (2 μl) was collected from 76 children (age 5.8 = 2.6 years, dmft = 2.9 = 3.5, DMTF = 0.6 = 1.4) and mixed with nitrite solution (final concentration = 0.63 mM) or distilled water (control). The initial pH (pH-0) of each sample was measured using a portable pH meter. The samples were incubated for 10 min, then their pH (pH-1) was measured again...
March 20, 2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28320072/constitutive-androstane-receptor-regulates-the-intestinal-mucosal-response-to-injury
#13
Grace M Hudson, Kyle L Flannigan, Sarah L Erickson, Fernando A Vicentini, Alexandra Zamponi, Christina L Hirota, Laurie Alston, Christophe Altier, Subrata Ghosh, Kevin P Rioux, Sridhar Mani, Thomas K Chang, Simon A Hirota
BACKGROUND AND PURPOSE: The pathogenesis of the inflammatory bowel diseases(IBD), composed of Crohn's disease(CD) and ulcerative colitis(UC), involves aberrant interactions between a genetically susceptible individual, their microbiota and environmental factors. Alterations in xenobiotic receptor expression and function are associated with increased risk for IBD. In the current study, we assessed the role of the constitutive androstane receptor(CAR), a xenobiotic receptor closely related to the pregnane X receptor, in the regulation of intestinal mucosal homeostasis...
March 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28319257/hunger-and-thirst-interact-to-regulate-ingestive-behavior-in-flies-and-mammals
#14
REVIEW
Nicholas Jourjine
In animals, nervous systems regulate the ingestion of food and water in a manner that reflects internal metabolic need. While the coordination of these two ingestive behaviors is essential for homeostasis, it has been unclear how internal signals of hunger and thirst interact to effectively coordinate food and water ingestion. In the last year, work in insects and mammals has begun to elucidate some of these interactions. As reviewed here, these studies have identified novel molecular and neural mechanisms that coordinate the regulation of food and water ingestion behaviors...
March 20, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28303369/clinical-aspects-of-changes-in-water-and-sodium-homeostasis-in-the-elderly
#15
REVIEW
Christian A Koch, Tibor Fulop
The population of elderly individuals is increasing worldwide. With aging, various hormonal and kidney changes occur, both affecting water homeostasis. Aging is a risk factor for chronic kidney disease (CKD) and many features of CKD are reproduced in the aging kidney. Dehydration and hyperosmolarity can be triggered by diminished thirst perception in this population. Elderly with dementia are especially susceptible to abnormalities of their electrolyte and body water homeostasis and should be (re-)assessed for polypharmacy...
March 16, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28300322/astroglia-as-a-cellular-target-for-neuroprotection-and-treatment-of-neuro-psychiatric-disorders
#16
REVIEW
Beihui Liu, Anja G Teschemacher, Sergey Kasparov
Astrocytes are key homeostatic cells of the central nervous system. They cooperate with neurons at several levels, including ion and water homeostasis, chemical signal transmission, blood flow regulation, immune and oxidative stress defense, supply of metabolites and neurogenesis. Astroglia is also important for viability and maturation of stem-cell derived neurons. Neurons critically depend on intrinsic protective and supportive properties of astrocytes. Conversely, all forms of pathogenic stimuli which disturb astrocytic functions compromise neuronal functionality and viability...
March 16, 2017: Glia
https://www.readbyqxmd.com/read/28292724/deleterious-role-of-trace-elements-silica-and-lead-in-the-development-of-chronic-kidney-disease
#17
Starlaine Mascarenhas, Srikanth Mutnuri, Anasuya Ganguly
Chronic-Kidney-Disease of Unknown-etiology (CKDu) has been reported in developing-countries like Sri-Lanka, India and Central-America without sparing the Indian sub-district (namely Canacona) located in south-Goa. The disease etiology is unlinked to common causes of diabetes and hypertension and assumed to be environmentally induced due to its asymptomatic-nature and occurrence in groundwater relying communities. This study aimed to understand environmental risk-factors underlying CKDu-etiology using Indian sub-district (Canacona) as case-study...
March 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28290590/the-ca-2-atpase-pump-facilitates-bidirectional-proton-transport-across-the-sarco-endoplasmic-reticulum
#18
L Michel Espinoza-Fonseca
Ca(2+) transport across the sarco/endoplasmic reticulum (SR) plays an essential role in intracellular Ca(2+) homeostasis, signalling, cell differentiation and muscle contractility. During SR Ca(2+) uptake and release, proton fluxes are required to balance the charge deficit generated by the exchange of Ca(2+) and other ions across the SR. During Ca(2+) uptake by the SR Ca(2+)-ATPase (SERCA), two protons are countertransported from the SR lumen to the cytosol, thus partially compensating for the charge moved by Ca(2+) transport...
March 14, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28288366/oligomeric-protein-complexes-of-apolipoproteins-stabilize-the-internal-fluid-environment-of-organism-in-redfins-of-the-tribolodon-genus-pisces-cypriniformes-cyprinidae
#19
Alla M Andreeva, Marina V Serebryakova, Nina E Lamash
One of the most important functions of plasma proteins in vertebrates is their participation in osmotic homeostasis in the organism. Modern concepts about plasma proteins and their capillary filtration are based on a model of large monomeric proteins that are able to penetrate the interstitial space. At the same time, it was revealed that a considerable amount of oligomeric complexes are present in the low-molecular-weight (LM) protein fraction in the extracellular fluids of fishes. The functions of these complexes are unknown...
March 1, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28286046/rudimentary-expression-of-ryamide-in-drosophila-melanogaster-relative-to-other-drosophila-species-points-to-a-functional-decline-of-this-neuropeptide-gene
#20
Jan A Veenstra, Hela Khammassi
RYamides are arthropod neuropeptides with unknown function. In 2011 two RYamides were isolated from D. melanogaster as the ligands for the G-protein coupled receptor CG5811. The D. melanogaster gene encoding these neuropeptides is highly unusual, as there are four RYamide encoding exons in the current genome assembly, but an exon encoding a signal peptide is absent. Comparing the D. melanogaster gene structure with those from other species, including D. virilis, suggests that the gene is degenerating. RNAseq data from 1634 short sequence read archives at NCBI containing more than 34 billion spots yielded numerous individual spots that correspond to the RYamide encoding exons, of which a large number include the intron-exon boundary at the start of this exon...
March 7, 2017: Insect Biochemistry and Molecular Biology
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