Effects of osmotic shocks on the ultrastructure of different tissues and cell types.

Abstract:

:This study deals with the effects of hyper- and hypo-osmotic media on the ultrastructure of four different types of cells and tissues: rat pheochromocytoma cells of line PC12, mouse Ehrlich ascites tumor cells, rat kidney cortex and intestine. Application of hyper-osmotic conditions induces in the nuclear compartment of the tested cell types a condensation of chromatin, a ruffling of the nuclear envelope with loosening of condensed chromatin from the lamina, and an apparent loss of nucleolar fibrillar component which disappears in a background of diffuse granular material. In hypo-osmotic media, there is a marked decondensation of chromatin and a fragmentation of the granular material of the nucleolus. As far as the cytoplasmic compartment is concerned, the electron density of the cytosol is markedly increasing when going from hypo- to hyper-osmotic conditions and there is no vacuolization in hypo-osmotic media. In kidney cortex slices, application of hypo-osmotic shocks further results in a marked reduction of the extracellular space delimited by the infoldings of the tubular cells plasma membranes. These modifications are discussed in relation to the volume regulation process and the changes in ion concentration that occur in cells submitted to anisosmotic media.

journal_name

Exp Cell Res

authors

Delpire E,Duchêne C,Goessens G,Gilles R

doi

10.1016/0014-4827(85)90240-x

subject

Has Abstract

pub_date

1985-09-01 00:00:00

pages

106-16

issue

1

eissn

0014-4827

issn

1090-2422

pii

0014-4827(85)90240-X

journal_volume

160

pub_type

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