Vasoactive intestinal peptide and noradrenaline exert long-term control on glycogen levels in astrocytes: blockade by protein synthesis inhibition
Vasoactive intestinal peptide and noradrenaline exert long-term control on glycogen levels in astrocytes: blockade by protein synthesis inhibition
复制标题
血管活性肠肽和去甲肾上腺素对星形胶质细胞中的糖原水平发挥长期控制:通过抑制蛋白质合成来阻断
DOI:
--
复制
发表时间:
1992
影响因子:
5.3
通讯作者:
P. Magistretti
中科院分区:
文献类型:
--
作者:
Olivier Sorg;P. Magistretti
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 Magistretti, 1991). In the present article, we report a second, temporally delayed, action of VIP or NA in primary cultures of mouse cerebral cortical astrocytes; thus, following glycogenolysis, an induction of glycogen resynthesis is observed, resulting, within 9 hr, in glycogen levels that are 6–10 times higher than those measured before the application of either neurotransmitter. This effect of VIP or NA is concentration dependent and, for NA, is mediated by adrenergic receptors of the beta subtype. The continued presence of the neurotransmitter is not necessary for this long-term effect, since pulses as short as 1 min result in the doubling of glycogen levels 9 hr later. The induction of glycogen resynthesis triggered by VIP or NA is dependent on protein synthesis, since both cycloheximide and actinomycin D abolish it entirely. The ability to elicit glycogenolysis is not sufficient per se to trigger the induction of glycogen resynthesis. Thus, two glycogenolytic agents such as methoxamine, an alpha 1-adrenergic agonist, and phorbol 12,13- dibutyrate, both acting via protein kinase C activation, are unable to induce glycogen resynthesis. This observation, taken together with the fact that dibutyryl-cAMP application also results in enhanced glycogen resynthesis, strongly suggests that the long-term effect of VIP or NA is mediated by the cAMP second-messenger pathway.(ABSTRACT TRUNCATED AT 250 WORDS)
登录
查看更多内容
DOI:
10.1016/0006-291x(87)91618-4
发表时间:
1987
影响因子:
3.1
作者:
Rosenfeld,RG;Pham,H;Keller,BT;Borchardt,RT;Pardridge,WM
通讯作者:
Pardridge,WM
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Clarke,DW;BoydJr,FT;Kappy,MS;Raizada,MK
通讯作者:
Raizada,MK
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hershey,AD;Dykema,PE;Krause,JE
通讯作者:
Krause,JE
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Roth,RA;Morgan,DO;Beaudoin,J;Sara,V
通讯作者:
Sara,V