Role of acetoin on the regulation of intermediate metabolism of ehrlich ascites tumor mitochondria: Its contribution to membrane cholesterol enrichment modifying passive proton permeability
Archives of Biochemistry and Biophysics, ISSN: 0003-9861, Vol: 283, Issue: 2, Page: 241-248
1990
- 32Citations
- 14Captures
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Metrics Details
- Citations32
- Citation Indexes32
- 32
- CrossRef27
- Captures14
- Readers14
- 14
Article Description
Acetoin, an unusual metabolite of highly glycolytic mammalian tumor cells, is synthesized from decarboxylated pyruvate and active acetaldehyde in mitochondria. It plays important roles in the regulation and detoxification of pyruvate metabolism through pyruvate dehydrogenase. We show in this report the inhibitory effect of acetoin on succinate oxidation by Ehrlich tumor cell mitochondria, and thus its regulatory role on intermediate metabolism. Acetoin utilization by Ehrlich mitochondria may lead to small quantities of citrate formation which increase the already increased cholesterol synthesis of cancer cells. Membranes, in particular the inner mitochondrial membrane, flooded with cholesterol, show a proton passive permeability twice as low as that of control mitochondrial membranes, a feature that may be related to drastic changes in membrane potential-dependent metabolism of cancer cells.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/000398619090638F; http://dx.doi.org/10.1016/0003-9861(90)90638-f; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0025633399&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/2275543; http://linkinghub.elsevier.com/retrieve/pii/000398619090638F; http://api.elsevier.com/content/article/PII:000398619090638F?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:000398619090638F?httpAccept=text/plain; https://linkinghub.elsevier.com/retrieve/pii/000398619090638F; http://dx.doi.org/10.1016/0003-9861%2890%2990638-f; https://dx.doi.org/10.1016/0003-9861%2890%2990638-f
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