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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Different localization in rat brain of the novel cytosolic ketone body-utilizing enzyme, acetoacetyl-CoA synthetase, as compared to succinyl-CoA:3-oxoacid CoA-transferase.

In lipogenic tissue cytosol, ketone bodies are known to be activated by acetoacetyl-CoA synthetase (AACS) and incorporated into cholesterol and fatty acids. In order to investigate the physiological role of AACS in the brain, we examined the localization of AACS mRNA in rat brain by in situ hybridization using a labeled probe. High labeling was observed in the midbrain, pons/medulla, cerebral cortex, hippocampus and cerebellum, and the localization profile of AACS mRNA was different from that of succinyl-CoA:3-oxoacid CoA-transferase (SCOT), a mitochondrial ketone body-activating enzyme. In addition, the expression of AACS mRNA in the cerebellum was restricted primarily to glial cells, while in the cerebral cortex, it was restricted to neuronal cells. Streptozotocin treatment caused remarkable decreases in AACS mRNA levels in all regions where expression was observed, but changes in SCOT mRNA levels were not observed. These results suggest that the physiological role of AACS is different from that of SCOT and varies depending upon its localization in the brain.[1]

References

  1. Different localization in rat brain of the novel cytosolic ketone body-utilizing enzyme, acetoacetyl-CoA synthetase, as compared to succinyl-CoA:3-oxoacid CoA-transferase. Ohnuki, M., Takahashi, N., Yamasaki, M., Fukui, T. Biochim. Biophys. Acta (2005) [Pubmed]
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