نتایج جستجو برای: mg2

تعداد نتایج: 7906  

Journal: :Biochimica et biophysica acta 2004
H Ebel M Hollstein T Günther

The effect of imipramine on Mg2+ efflux in NaCl medium (Na+/Mg2+ antiport), on Mg2+ efflux in choline.Cl medium (choline/Mg2+ antiport) and on Mg2+ efflux in sucrose medium (Cl- -coupled Mg2+ efflux) was investigated in rat erythrocytes. In non-Mg2+-loaded rat erythrocytes, imipramine stimulated Na+/Mg2+ antiport but inhibited choline/Mg2+ antiport and Cl- -coupled Mg2+ efflux. The same effect ...

2018
Tatsuro Maruyama Shunsuke Imai Tsukasa Kusakizako Motoyuki Hattori Ryuichiro Ishitani Osamu Nureki Koichi Ito Andrès D Maturana Ichio Shimada Masanori Osawa

Magnesium ions (Mg2+) are divalent cations essential for various cellular functions. Mg2+ homeostasis is maintained through Mg2+ channels such as MgtE, a prokaryotic Mg2+ channel whose gating is regulated by intracellular Mg2+ levels. Our previous crystal structure of MgtE in the Mg2+-bound, closed state revealed the existence of seven crystallographically-independent Mg2+-binding sites, Mg1-Mg...

ژورنال: :تعالی بالینی 0
امید صادقی omid sadeghi مرتضی نصیری morteza nasiri فاطمه الله یاری بیاتیانی fatemeh allahyari bayatiyani حمید رسد hamid rasad ناصح پهلوانی naseh pahlavani زهرا مقصودی zahra maghsoudi غلامرضا عسکری

میگرن یک بیماری عصبی- عروقی مغزی می باشد که 6 درصد از مردان و 18 درصد از زنان را در سراسر جهـان درگیر می­کند. شواهد نشان می­دهند که میگرن با کاهش سطح منیزیم در سرم همراه می­باشد و همچنین دریافت آن می­تواند علائم میگرن را کاهش دهد. هدف مطالعه­ی حاضر، مروری بر پژوهش­های انجام گرفته در زمینه ارتباط میگرن با منیزیم می­باشد. این مطالعه مروری با جستسجو در پایگاه­های اطلاعاتی pubmed،scopus ،science di...

Journal: :The Journal of experimental biology 1997
Sartoris PÖRtner

The effects of temperature (0, 5, 10, 15 and 20 °C) and of anoxia (at 5 °C) on extracellular Mg2+ concentration ([Mg2+]e), intracellular pH (pHi) and ATP and lactate levels were investigated in intermoult adults of the common shrimp Crangon crangon. All animals caught in summer (summer animals) showed a slight but significant increase in [Mg2+]e at low temperatures. In contrast, at ever...

Journal: :Frontiers in bioscience : a journal and virtual library 1997
A Zhang B T Altura B M Altura

Extracellular magnesium ions [Mg2+]o are known to regulate functions of endothelial cells, but whether [Mg2+]o can alter intracellular free ionized magnesium [Mg2+]i in these cells remains unknown. The present studies, using digital imaging microscopy and the Mg2+ fluorescent probe, mag-fura-2, determined effects of elevation of [Mg2+]o on [Mg2+]i in cultured human aortic endothelial cells. Wit...

Journal: :FEMS microbiology letters 2004
Elisabeth M Froschauer Martin Kolisek Frank Dieterich Monika Schweigel Rudolf J Schweyen

The Mg2+ fluorescent dye mag-fura 2, entrapped in cells or organelles, has frequently been used for dual excitation ratio-metric determinations of free ionic Mg2+ concentrations in eukaryotic, mostly mammalian cells. Here we report its successful application to measure free Mg2+ concentrations ([Mg2+]i) in Salmonella enterica cells. When kept in nominally Mg2+ free buffer (resting conditions), ...

Journal: :Magnesium research 2007
Theodor Günther

The concentration of intracellular free Mg2+ ([Mg2+]i) in erythrocytes, measured by means of 31P NMR and using a dissociation constant for MgATP of 38-50 microM, amounted to 0.2 mM [Mg2+]i in the erythrocytes of various species, was not significantly different and was independent of their total Mg2+ content. The more probable value of [Mg2+]i using the more realistic KD of Mg ATP or the null-po...

Journal: :The Biochemical journal 1989
P A Walton F Possmayer

Lung contains both Mg2+-dependent and Mg2+-independent phosphatidate phosphohydrolase activities. Addition of Triton X-100 (0.5%) or chlorpromazine (1 mM) leads to a marked increase in the total phosphatidate phosphohydrolase activity in rat lung microsomes (microsomal fractions), but a decrease in the Mg2+-dependent activity. These observations suggest that the Mg2+-independent activity is sti...

Journal: :American journal of physiology. Gastrointestinal and liver physiology 2006
Monika Schweigel Hi-Sung Park Benjamin Etschmann Holger Martens

This study examines the routes by which Mg2+ leaves cultured ovine ruminal epithelial cells (REC). Mg2+-loaded (6 mM) REC were incubated in completely Mg2+-free solutions with varying Na+ concentrations, and the Mg2+ extrusion rate was calculated from the increase of the Mg2+ concentration in the incubation medium determined with the aid of the fluorescent probe mag-fura 2 (Na+ salt). In other ...

Magnesium is an abundant element in the environment. Magnesium ion sensing by fluorescence spectral method is of importance due to the need for the detection of the metal in the human body and the environment. In this paper, we report the Mg2+ ion sensing behavior of the phenylhydrazone derivative of a difluorenylpiperidin-4-one. The preparation method of this compound is simple. The compound s...

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