Adenosine triphosphate and arachidonic acid stimulate glycogenolysis in primary cultures of mouse cerebral cortical astrocytes
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Brain glycogen levels are dynamically regulated by certain neurotransmitters, including noradrenaline (NA) and vasoactive intestinal peptide (VIP). In particular, glycogen synthesis involves activation by NA and VIP of the transcription factors C/EBPbeta a ...
Vasoactive intestinal peptide (VIP) and noradrenaline (NA) have been previously shown to promote glycogenolysis in mouse cerebral cortex (Magistretti, 1990). This action, which is fully expressed within a few minutes, is exerted on astrocytes (Sorg and Mag ...
The regulation by fibrates and dietary fatty acids of the hepatic gene expression of apolipoproteins (apo) A-I and A-II, the major protein constituents of high-density lipoproteins, as well as of acyl-CoA oxidase, the rate-limiting enzyme of the peroxisoma ...
VIP neurons are a homogeneous population of intracortical bipolar cells. They receive excitatory synapses from afferent circuits to the cortex and exert effects on neurons, astrocytes, and capillaries. Effects on the two latter cell types imply that VIP ne ...
Arachidonic acid (AA) has recently been shown to influence various cellular functions in the central nervous system. Here we report that AA increases, in a time- and concentration-dependent manner, 2-deoxy-D-[1-3H]glucose ([3H]2DG) uptake in primary cultur ...
In recent years evidence has accumulated indicating the presence of functional receptors for most neurotransmitters on astrocytes. In particular, receptors coupled to adenylate cyclase have been demonstrated, in primary astrocyte cultures, for vasoactive i ...
In rodent cerebral cortex, vasoactive intestinal peptide (VIP) is contained in a homogeneous population of radially oriented bipolar interneurons. We have observed that 4-aminopyridine (4-AP), a K+-channel blocker, promotes a concentration- and Ca2+-depend ...
Fish oil polyunsaturated fatty acids and fibrate hypolipidemic drugs are potent hypotriglyceridemic agents that act by increasing fatty acid catabolism and decreasing triglyceride synthesis and secretion by the liver. A major unresolved issue is whether th ...
A regulatory volume decrease is accomplished by parallel activation of Ca(2+)-dependent K+ channels and Ca(2+)-independent Cl- channels in cultured human intestinal epithelial cells (Intestine 407). The anion selectivity of whole-cell currents recorded in ...
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 ...