PMID: 3215790Jan 1, 1988Paper

A cytochemical study on the effects of energy deprivation on autophagocytosis in Ehrlich ascites tumor cells

Histochemistry
H Reunanen, P Nykänen

Abstract

The effect of energy deprivation on autophagocytosis in Ehrlich ascites tumor cells was studied using cytochemical techniques. Autophagocytosis was induced with vinblastine incubation (0.1 mM) and the cellular ATP-level was lowered with 2-deoxy-D-glucose (0.35 mM). Acid phosphatase was used as a marker for lysosomal enzymes and imidazole-buffered osmium tetroxide impregnation in order to study the effects of energy deprivation on the maturation of autophagic vacuole (AV) membranes. Control and vinblastine treated cells maintained their ATP-levels throughout the incubation period tested (120 min). 2-Deoxy-D-glucose alone and with vinblastine decreased the intracellular ATP-level significantly after only 3 min incubation. Most of the AV's in control and vinblastine treated cells contained degraded material and acid phosphatase activity. Their membranes were stained only slightly or not at all with imidazole-buffered osmium tetroxide. 2-Deoxy-D-glucose alone as well as with vinblastine induced in particular an accumulation of early stages of AV's. These vacuoles contained undegraded cytoplasmic material and no acid phosphatase activity and their membranes were stained usually partly with imidazole-buffered osmium tetroxide. The me...Continue Reading

References

Apr 1, 1987·European Journal of Biochemistry·P J PlompP O Seglen
Jan 1, 1966·Annual Review of Physiology·C De Duve, R Wattiaux
Feb 1, 1982·Analytical Biochemistry·E Walum, A Peterson

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Citations

Oct 1, 1991·The Histochemical Journal·J P Schellens, A J Meijer
Feb 1, 1990·Experimental and Molecular Pathology·E L Punnonen, H Reunanen
Oct 1, 1991·Journal of Photochemistry and Photobiology. B, Biology·I Freitas, G F Baronzio

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