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Flow cytometry is a new method for the characterization of intestinal plasma membrane.


ABSTRACT: The highly differentiated plasma membrane of rabbit enterocytes constitutes an interesting model for membrane studies. Flow cytometry allows combined measurements of the size of membrane vesicles by light-scatter and fluorescence polarization at a single-particle level. The degree of fluorescence polarization of 1,6-diphenylhexa-1,3,5-triene was determined at 4, 18 and 37 degrees C in the brush-border and basolateral plasma membranes. The fluorescence polarization was considerably higher in brush-border than in basolateral membranes. After incubation with dimethyl sulphoxide, the membrane fluidity decreased in both types of membranes. Moreover, a time-effect study of dimethyl sulphoxide showed changes in fluorescence polarization. Only in brush-border membrane a temporary fluid phase was observed. The different properties of the two membrane domains in relation to the lipid-protein dynamics of enterocytes are discussed.

SUBMITTER: Gorvel JP 

PROVIDER: S-EPMC1144058 | biostudies-other | 1984 Jul

REPOSITORIES: biostudies-other

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