Adenosine stimulates glycogenolysis in mouse cerebral cortex: a possible coupling mechanism between neuronal activity and energy metabolism
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Signals detected with functional brain imaging techniques are based on the coupling between neuronal activity and energy metabolism. Positron emission tomography signals detect blood flow, oxygen consumption and glucose utilization associated with neuronal ...
Astrocytes appear to be ideally localized to couple neuronal activity to energy metabolism. First, specialized processes, the astrocytic end-feet surround blood vessels, the source of glucose for the brain. Second, other processes ensheath synapses and exp ...
Evidence suggests that astrocytes might play an important role in cerebral energy metabolism. A recently developed cell line, called DI TNC1, displays several characteristic features of astrocytes. Thus, we have investigated in these cells a number of para ...
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The discovery of the obese gene in the mouse and its conserved homologue in humans has led to important discoveries in energy metabolism. One of the chief findings was the fact that the expression of the leptin gene was regulated and that it, in turn, coul ...
Astrocyte end-feet surround intraparenchymal microvessels and represent therefore the first cellular barrier for glucose entering the brain. As such, they are a likely site of prevalent glucose uptake. Astrocytic processes are also wrapped around synaptic ...
We have examined the interactions, in eliciting cAMP accumulation, between vasoactive intestinal polypeptide (VIP) and the three monoamines norepinephrine (NE), histamine (HIS), and serotonin (5-hydroxytryptamine, 5-HT) in mouse cerebral cortical slices. W ...
Glucose is the main fuel for energy metabolism in the normal human brain. It is generally assumed that glucose transport into the brain is not rate-limiting for metabolism. Since brain glucose concentrations cannot be determined directly by radiotracer tec ...
The effect of increasing [K+]0 on 3H-glycogen levels was examined in mouse cerebral cortical slices. K+ stimulates in a time- and concentration-dependent manner the hydrolysis of 3H-glycogen. Over 70% of the maximal effect is reached within 30 sec and the ...
Cytokines can be produced within the nervous system by various cell types, including astrocytes, which secrete them in response to pathological processes such as viral infections. Astrocytes are known to play an important role in the homeostasis of the ner ...
