[Changes in the lysosome composition in cultured hepatocytes from 3-day-old rats with destabilization of the cytoplasmic microtubules].
The monolayer culture of 3-day-old rat hepatocytes was treated by antimicrotubule agent colchicine after activation with isoproterenol. Alterations in the amount of lysosomes with the size of 1.0-2.5 and 3-6 mkm per cell were studied with light microscope after staining with the vital dye neutral red and after identification of acid phosphatase by plumbum precipitation in the frozen preparations. It was shown that isoproterenol application (20 microM) within 1.5 h did not change significantly the number of lysosomes sized 1.0-2.5 microns but stimulated the increase in the amount of lysosomes 3-6 mkm in size. The addition of 2.5 mM colchicine, after the isoproterenol treatment, decreases greatly the number of lysosomes with the size of 1.0-2.5 and 3-6 mkm. A considerable part of the large lysosomes can be resistant to the colchicine action. It is concluded that the microtubules play an important role in lysosome functioning.
Stvolinskaia
N S
NS
Korovokin
B F
BF
D000818:Animals; D002478:Cells, Cultured / Q000187:drug effects / Q000648:ultrastructure; D003078:Colchicine / Q000494:pharmacology; D003584:Cytological Techniques; D003593:Cytoplasm / Q000187:drug effects / Q000648:ultrastructure*; D004347:Drug Interactions; D007545:Isoproterenol / Q000494:pharmacology; D008099:Liver / Q000187:drug effects / Q000648:ultrastructure*; D008247:Lysosomes / Q000187:drug effects / Q000648:ultrastructure*; D008870:Microtubules / Q000187:drug effects / Q000648:ultrastructure*; D009499:Neutral Red; D051381:Rats
D009499:Neutral Red; D007545:Isoproterenol; D003078:Colchicine
Izmenenie sostava lizosom v kul'tiviruemykh gepatotsitakh 3-sutochnykh krys pri destabilizatsii tsitoplazmaticheskikh mikrotrubochek.