Long-lasting CNS effects of a short-term chemical knockout of ornithine decarboxylase during development: nicotinic cholinergic receptor upregulation and subtle macromolecular changes in adulthood.
Long-lasting CNS effects of a short-term chemical knockout of ornithine decarboxylase during development: nicotinic cholinergic receptor upregulation and subtle macromolecular changes in adulthood.
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发育过程中鸟氨酸脱羧酶短期化学敲除对中枢神经系统的长期影响:烟碱胆碱能受体上调和成年期微妙的大分子变化。
DOI:
10.1016/s0006-8993(03)02993-7
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发表时间:
2003
期刊:
影响因子:
2.9
通讯作者:
Seidler,FredericJ
中科院分区:
文献类型:
--
作者:
Slotkin,TheodoreA;Freibaum,BrianD;Tate,CharlotteA;Thillai,Indira;Ferguson,SherryA;Cada,AmyM;Seidler,FredericJ
Ornithine decarboxylase (ODC) and the polyamines play an essential role in brain cell replication and differentiation and polyamines also regulate the function of nicotinic acetylcholine receptors (nAChRs). We administered α-difluoromethylornithine (DFMO), an irreversible inhibitor of ODC, to neonatal rats on postnatal days 5–12, during the mitotic peak of the cerebellum, a treatment regimen that achieves a chemical knockout of ODC activity and polyamine depletion limited to the treatment period. Although growth inhibition and gross dysmorphology were limited to the cerebellum, both α7 and α4β2 nAChRs were upregulated in adulthood in the frontal cortex, hippocampus and thalamus, with the largest effect in the latter region, primarily in females. Receptor upregulation was accompanied by abnormalities in macromolecular indices of cell packing density and cell membrane surface area, but the generalized cellular alterations did not share the regional or sex selectivity shown by the effects on nAChRs. Elevated DNA concentration was most notable in the hippocampus and was associated with augmented levels of glial fibrillary acidic protein, thus implying gliosis as the cause of the increased number of cells. DFMO’s effects on both nAChR expression and cellular biomarkers resembled those of developmental exposure to nicotine. Accordingly, some of the effects may represent a specific alteration in nAChR signaling evoked by polyamine depletion during a critical developmental window. Alterations in polyamine gating of cholinergic synaptic signaling may thus contribute to the adverse neurobehavioral effects of numerous neuroteratogens that directly or indirectly disrupt the ODC/polyamine pathway.
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影响因子:
4
作者:
P. Thorogood;A. Wood
通讯作者:
A. Wood
DOI:
--
发表时间:
1976
期刊:
The Journal of experimental zoology
影响因子:
--
作者:
Antone G. Jacobson;Antone G. Jacobson;Richard Gordon;Richard Gordon
通讯作者:
Richard Gordon
DOI:
--
发表时间:
1980-12
期刊:
Journal of embryology and experimental morphology
影响因子:
--
作者:
R. Keller
通讯作者:
R. Keller
DOI:
10.1242/dev.105.1.155
发表时间:
1989
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Wilson,PA;Oster,G;Keller,R
通讯作者:
Keller,R
DOI:
--
发表时间:
1985
期刊:
Journal of embryology and experimental morphology
影响因子:
--
作者:
R. Keller;M. Danilchik;R. Gimlich;J. Shih
通讯作者:
J. Shih