[The effect of small doses of ionizing radiation on the physico-chemical characteristics of the membranes of peripheral blood lymphocytes of rats].
The fluorescence probe method was used for investigating the physical state of a total lipid phase of a bi-layer and an annular (near-protein) zone of the membrane lipids of lymphocytes in a peripheral blood of rats on the 10th day after a whole-body acute and chronic gamma-exposure to doses of 0.25, 0.5, and 1.0 Gy. It was discovered that exposure to doses of 0.25, 0.5, and 1.0 Gy revealed no reliable distinctions in the parameters of a physical state of the lipid component of membranes within the given period of observation if compared with those of controls. However chronic exposure to the same doses caused the increase in hydrophobicity of the total lipid phase of the membrane bi-layer with no change in the polarity of an annular lipid. The near-protein zone of lipids revealed a local decrease in microviscosity while the fluidity of total lipids of a membrane bi-layer remained unaltered. A detected change of tryptophan fluorescence of the membrane proteins after exposing them to small dosed has also been carried out.
Prishchep
S G
SG
International Sakharov Environmental University, Minsk, Belarus. prischep@gray.isir.minsk.by
Gerasimovich
N V
NV
Bulanova
K Ia
KIa
Miliutin
A A
AA
D000818:Animals; D002462:Cell Membrane / Q000737:chemistry / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D005720:Gamma Rays; D008214:Lymphocytes / Q000737:chemistry / Q000528:radiation effects* / Q000648:ultrastructure*; D008297:Male; D008560:Membrane Fluidity / Q000528:radiation effects; D008563:Membrane Lipids / Q000737:chemistry / Q000528:radiation effects*; D051381:Rats; D014916:Whole-Body Irradiation
D008563:Membrane Lipids