نتایج جستجو برای: 1829 mgdl and mg2 080

تعداد نتایج: 16828979  

Journal: :Dynamic medicine : DM 2005
Emil Malucelli Raffaele Lodi Andrea Martinuzzi Caterina Tonon Bruno Barbiroli Stefano Iotti

BACKGROUND The increase in cytosolic free Mg2+ occurring during exercise and initial recovery in human skeletal muscle is matched by a decrease in cytosolic pH as shown by in vivo phosphorus magnetic resonance spectroscopy (31P MRS). To investigate in vivo to what extent the homeostasis of intracellular free Mg2+ is linked to pH in human skeletal muscle, we studied patients with metabolic myopa...

Journal: :The Journal of biological chemistry 1985
S H Lin

The high affinity (Ca2+-Mg2+)-ATPase purified from rat liver plasma membrane (Lin, S.-H., and Fain, J. N. (1984) J. Biol. Chem. 259, 3016-3020) has been further characterized. This enzyme also possesses Mg2+-stimulated ATPase activity with K0.5 of 0.16 microM free Mg2+. However, the Vm of the Mg2+-stimulated activity is only half that of the Ca2+-stimulated ATPase activity. The effects of Ca2+ ...

J Mirnajafizadeh M Rostampour S Hajizadeh S Semnanian Y Fathollahi

Extracellular population responses are largely preferred for the study of long-term potentiation (LTP). The effect of Mg2+-free medium on changes in activity and plasticity of Schaffer collateral-CA1 pyramidal cell synapses was examined. Hippcampal slices from cysteamine-treated (200 mg/kg, s.c.) and saline-injected (1 ml/kg, s.c.) albino rats were perfused with ACSF. Population spikes (PS) wer...

2017
Bernardo Ortega Jason M Dey Allison R Gardella Jacob Proano Deanna Vaneerde

Monoclonal antibody therapies targeting the EGF receptor (EGFR) frequently result in hypomagnesemia in human patients. In contrast, EGFR tyrosine kinase inhibitors do not affect Mg2+ balance in patients and only have a mild effect on Mg2+ homeostasis in rodents at elevated doses. EGF has also been shown to affect phosphate (Pi) transport in rat and rabbit proximal convoluted tubules (PCT), but ...

Journal: :Magnesium research 2009
Yuriko Furukawa Nahoko Kasai Keiichi Torimitsu

Mg2+ plays an important role in biological functions, similar to that of Ca2+. In terms of neural activity, it is well known that Mg2+ blocks the NMDA receptor. However, the relationship between Mg2+ and neural function has not been well understood. We have investigated the effect of low extracellular Mg2+ concentration ([Mg2+]o) on neural activity in rat cortical and hippocampal neurons by usi...

2017
Izumi Ando Kaoru Karasawa Shinichi Yokota Takao Shioya Hiroshi Matsuda Akane Tanaka

Magnesium ions (Mg2+) are essential for various enzymatic reactions in the body associated with energy production and activation of the muscles and nerves. Mg2+ is also involved in blood pressure regulation, maintenance of body temperature, and glucose metabolism. Although various factors including foods and physical conditions have been reported to change serum Mg2+ status in humans, serum Mg2...

Journal: :The American journal of physiology 1999
Dennis W Jung Gerald P Brierley

Mitochondria must maintain volume homeostasis in order to carry out oxidative phosphorylation. It has been postulated that the concentration of free Mg2+([Mg2+]) serves as the sensor of matrix volume and regulates a K+-extruding K+/H+antiport (K. D. Garlid. J. Biol. Chem. 255: 11273-11279, 1980). To test this hypothesis, the fluorescent probe furaptra was used to monitor [Mg2+] and free Ca2+ co...

Journal: :Journal of bacteriology 1976
T Tsuchiya B P Rosen

Adenosine 5'-triphosphate (ATP) synthesis driven by an artificially imposed membrane potential in right-side-out membrane vesicles of Escherichia coli was investigated. Membrane vesicles prepared in the presence of adenosine diphosphate were loaded with K+ by incubation with 0.5 M potassium phosphate. Addition of valinomycin resulted in the synthesis of 0.2 to 0.3 nmol of ATP/mg of membrane pro...

Journal: :The Journal of biological chemistry 1975
T Tsuchiya B P Rosen

Inverted membrane vesicles from strain 7, a wild type Escherichia coli K12 strain, actively transport calcium with energy supplied either by respiration or by ATP. These vesicles also have energy-linked quenching of quinacrine fluorescence. Membranes of strain 7, depleted of Mg2+ATPase by EDTA treatment, lack both activities. Membrane vesicles from strain NR70, a mutant lacking the Mg2+ATPase, ...

Journal: :Medical History 1982
Ulrich Troehler

and with the new social order associated with industrialization and urban life. He understands these attitudes to be derivative of humanitarian sentiments displaced upon animals, the distinction between man and beast having been eroded by physiological and taxonomic studies in the eighteenth century. While his interpretation appears reasonable and persuasive, it is really not adequate to explai...

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