scholarly journals Relationship between Cell Morphology and Intracellular Potassium Concentration in Candida albicans

2006 ◽  
Vol 59 (5) ◽  
pp. 281-287 ◽  
Author(s):  
Hiroshi Watanabe ◽  
Masayuki Azuma ◽  
Koichi Igarashi ◽  
Hiroshi Ooshima
Keyword(s):  
Candida Albicans ◽  
Cell Morphology ◽  
Potassium Concentration ◽  
Intracellular Potassium ◽  
Intracellular Potassium Concentration

Corticosteroids and incorporation of C14-phenylalanine into protein of isolated rat diaphragm

1960 ◽  
Vol 198 (5) ◽  
pp. 1111-1114 ◽  
Author(s):  
Ira G. Wool ◽  
Edward I. Weinshelbaum
Keyword(s):  
Potassium Concentration ◽  
Protein Biosynthesis ◽  
Fold Change ◽  
Prior Treatment ◽  
Rat Diaphragm ◽  
Phenylalanine Concentration ◽  
Intracellular Potassium ◽  
Intracellular Potassium Concentration ◽  
Isolated Rat

Prior treatment of rats with cortisone (2 mg/day) decreased l-phenylalanine-U-C14 incorporation into protein of isolated diaphragm. This action was not affected by a 100-fold change in the phenylalanine concentration, indicating that the steroid depresses protein biosynthesis in muscle. Hydrocortisone (50 µg/ml) added in vitro did not alter C14-phenylalanine incorporation. Large changes in intracellular potassium concentration were without influence on phenylalanine incorporation into protein of diaphragms from normal, adrenalectomized or cortisone-treated rats.

Muscle Electrolytes and Fluid Compartments in Six Children with Bartter's Syndrome

1978 ◽  
Vol 54 (3) ◽  
pp. 223-231 ◽  
Author(s):  
Christine Delaporte ◽  
J. Stulzaft ◽  
C. Loirat ◽  
M. Broyer
Keyword(s):  
Potassium Concentration ◽  
Negative Relationship ◽  
Plasma Potassium ◽  
Bartter’S Syndrome ◽  
Bartter's Syndrome ◽  
Intracellular Potassium ◽  
Control Subjects ◽  
Fluid Compartments ◽  
Total Muscle ◽  
Intracellular Potassium Concentration

1. Muscle electrolyte (Na, K, Cl, P) concentrations and fluid compartments of six children with Bartter's syndrome were compared with those of 17 control children. From four of the patients biopsies were taken twice, before and after treatment with potassium chloride and spironolactone. Muscle electrolytes were determined by neutron activation in tissue sampled by needle biopsy. Results were expressed in relation to fat-free dry solids. Trapped extracellular fluid was calculated from the chloride space, a normal resting membrane potential being assumed. 2. In hypokalaemic patients total muscle potassium (Km) (33·0 ± 2·1 sem) was below the normal range (43·8 ± 0·7 mmol/100 g of fat-free dry solids) in all cases. When plasma potassium was corrected, total muscle potassium returned to normal. There was a significant correlation between plasma potassium concentration and total muscle potassium (r = 0·87; P < 0·01). Total muscle sodium (Nam) was increased: 18·7 ± 2·9 mmol/100 g in hypokalaemic patients (11·3 ± 0·6 mmol/100 g of fat-free dry solids in control subjects). A negative relationship was found between Km and Nam (r = —0·85; P < 0·01). With treatment, intracellular potassium concentration remained low (142·0 mmol/l of intracellular water; control, 163·0 ± 2·4 mmol/l) despite normokalaemia and normal total muscle potassium. Muscle phosphorus (32·1 ± 1·8 mmol/100 g) was higher than in control subjects (28·1 ± 0·4 mmol/100 g of fat-free dry solids). 3. These data suggest that sodium replaces potassium in muscle of patients with Bartter's syndrome. The low intracellular potassium concentration in the binephrectomized sister of one child and in all treated children suggests that there are generalized anomalies in the handling of cations in Bartter's syndrome.

scholarly journals The Suppression of the Late After-Potential in Rubidium-Containing Frog Muscle Fibers

1965 ◽  
Vol 48 (6) ◽  
pp. 1003-1010 ◽  
Author(s):  
D. C. Hellam ◽  
D. A. Goldstein ◽  
L. D. Peachey ◽  
W. H. Freygang
Keyword(s):  
Membrane Potential ◽  
Potassium Concentration ◽  
Muscle Fibers ◽  
Frog Muscle ◽  
Muscle Membrane ◽  
Potassium Permeability ◽  
Intracellular Potassium ◽  
Intracellular Potassium Concentration

The late after-potential that follows trains of impulses in frog muscle fibers is virtually absent when most of the intracellular potassium is replaced by rubidium and the muscle is immersed in rubidium-containing Ringer's fluid. Its amplitude is also reduced in freshly dissected, potassium-containing muscle fibers that are immersed directly in Rb-Ringer's fluid. These findings are discussed in terms of the model for muscle membrane of Adrian and Freygang (1962 a, b) and in relation to the report of Adrian (1964) that Rb-containing muscle fibers do not exhibit the variations in potassium permeability as a function of membrane potential that are found in fibers with normal intracellular potassium concentration immersed in Ringer's fluid.

scholarly journals Alterations in intracellular potassium concentration by HIV-1 and SIV Nef

2008 ◽  
Vol 5 (1) ◽  
pp. 60 ◽  
Author(s):  
Bongkun Choi ◽  
Cesar D Fermin ◽  
Alla M Comardelle ◽  
Allyson M Haislip ◽  
Thomas G Voss ◽  
...  
Keyword(s):  
Potassium Concentration ◽  
Intracellular Potassium ◽  
Hiv 1 ◽  
Intracellular Potassium Concentration
Sign in / Sign up

Export Citation Format

Share Document