Human red blood cell membrane potential and fluidity in glucose solutions.
This study aimed to investigate the membrane potential and fluidity changes of human red blood cells subjected to isotonic glucose solutions. For the control erythrocytes a membrane potential value of -10.1 +/- 1.8 mV was obtained, whereas erythrocyte membranes in diabetic cells were hyperpolarized, with a potential of -13.9 +/- 2.3 mV. Incubation of both types of red blood cells with increasing glucose concentrations resulted in a substantial hyperpolarization of the cell membranes. Glucose solutions in water had a much stronger effect on membrane potential than glucose dissolved in phosphate-buffered saline. Red blood cell membrane fluidity measurements using the fluorescent label TMADPH did not reveal any significant changes upon incubation with glucose.
Zavodnik
I B
IB
Institute of Biochemistry, Academy of Sciences of Belarus, Grodno.
Piasecka
A
A
Szosland
K
K
Bryszewska
M
M
D052160:Benzothiazoles; D002232:Carbocyanines; D003920:Diabetes Mellitus / Q000097:blood; D004161:Diphenylhexatriene / Q000031:analogs & derivatives; D004910:Erythrocyte Membrane / Q000187:drug effects* / Q000502:physiology*; D005456:Fluorescent Dyes; D005947:Glucose / Q000494:pharmacology*; D006801:Humans; D007552:Isotonic Solutions; D008560:Membrane Fluidity / Q000187:drug effects*; D008564:Membrane Potentials / Q000187:drug effects
D052160:Benzothiazoles; D002232:Carbocyanines; D005456:Fluorescent Dyes; D007552:Isotonic Solutions; D004161:Diphenylhexatriene; C012944:3,3'-dipropyl-2,2'-thiadicarbocyanine; C033628:1-(4-(trimethylamino)phenyl)-6-phenylhexa-1,3,5-triene; D005947:Glucose