منابع مشابه
Regulation of intracellular pH.
The approach that most animal cells employ to regulate intracellular pH (pH(i)) is not too different conceptually from the way a sophisticated system might regulate the temperature of a house. Just as the heat capacity (C) of a house minimizes sudden temperature (T) shifts caused by acute cold and heat loads, the buffering power (beta) of a cell minimizes sudden pH(i) shifts caused by acute aci...
متن کاملMetabolic regulation via intracellular pH.
Despite earlier notions that intracellular pH (pHi) was invariant with time, recent studies have documented pHi changes of from 0.1 to 1.6 U during metabolic and developmental transitions in a variety of cells. Here we review the evidence for pHi-mediated regulation of gamete activation, cellular dormancy, the cell cycle, and stimulus-response coupling. Intracellular Ca2+ level changes also acc...
متن کاملIntracellular pH of the mouse preimplantation embryo: amino acids act as buffers of intracellular pH.
The inclusion of specific amino acids in conventional culture media has been shown to enhance mammalian embryo development in vitro. Amino acids have been shown to confer their benefits to the preimplantation embryo in a number of different ways. However, their ability to buffer intracellular pH (pHi) has not been investigated. Thus, the aim of this study was to determine if amino acids regulat...
متن کاملHeterogeneity of intracellular pH and of mechanisms that regulate intracellular pH in populations of cultured cells.
Cells within solid tumors are known to exist in a microenvironment that may be acidic and depend on membrane-based mechanisms (Na+/H+ antiport and Na+-dependent Cl-/HCO3- exchanger) that regulate intracellular pH (pHi). We have used the fluorescent pH indicator 2',7'-bis-(2-carboxyethyl) 5 (and 6)-carboxyfluorescein and flow cytometry to study the distribution of pHi and the activity of these p...
متن کاملIntracellular pH and intracellular buffering power of the cat brain.
ROOS, ALBERT. Intracellular pH and intracellular buffering power of the cat brain. Am. J. Physiol. 2og(6): 1233-1246. 1965.~In 49 cats the intracellular pH (pHi) of the brain was estimated from the distribution of 5,5-dimethyloxazolidine-2 ,4-dione2-Cl4 (DMO) between brain, plasma, and CSF, at arterial pCOz of 14.5-83.2 mm Hg. From six cats cortical biopsies were taken; in the remainder, brain ...
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ژورنال
عنوان ژورنال: Kidney International
سال: 1972
ISSN: 0085-2538
DOI: 10.1038/ki.1972.45