Abstract：
:Spinal motor neurons of Sprague-Dawley rats were examined to determine which of the neuronal isoforms of actin (beta or gamma) upregulate following axon injury. In situ hybridization studies showed greater beta-actin mRNA levels but no change in gamma-actin mRNA levels-suggesting that axon regrowth utilizes beta-actin. We radiolabeled the newly synthesized actin and tubulin that are subsequently transported in the axon to the site of an axotomizing injury. This allowed us to evaluate changes in polymerization as new cytoskeletal elements approach the injury site. Previous studies had shown that the rate of the most rapid subcomponent of actin and tubulin transport (called SCb) accelerates following axotomy (J. Jacob and I. McQuarrie, J. Neurobiol. 22: 570-583, 1991). This rate increase is associated with an increased proportion of SCb tubulin and actin in polymer (vs monomer) form (J. Jacob and I. McQuarrie, J. Neurosci, Res. 43: 412-419, 1996). However, in that study newly synthesized proteins were radiolabeled at 7 days after axotomy-which is at the peak of increased protein synthesis. This time-course did not examine actin and tubulin that were already in transit in axons when the injury occurred. This actin and tubulin would enter the regrowing axons first. Here, we have radiolabeled newly synthesized proteins 3 days prior to axotomy. For beta-tubulin, the ratio of monomer to polymer was unaffected. For actin, the equilibrium shifted strongly toward polymerization. We conclude that the acceleration of axonal outgrowth seen after the second of two serial axotomies (the "conditioning lesion effect") is related to the ability of actin that is already in transit to polymerize in response to the first axotomy.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Lund LM,Machado VM,McQuarrie IGdoi
10.1006/exnr.2002.8034keywords:
subject
Has Abstractpub_date
2002-12-01 00:00:00pages
306-12issue
2eissn
0014-4886issn
1090-2430pii
S0014488602980349journal_volume
178pub_type
杂志文章abstract：:It is clear that there are events which occur in response to neuromuscular activity that are essential to maintain normal muscle properties. Two factors though to influence muscle contractile properties are tension and electrical activity. To study these variables the hind limbs of 10 postpubertal female Sprague-Dawle...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(87)90226-3
更新日期：1987-06-01 00:00:00
abstract：:Urinary bladder and urethral sphincter responses evoked by bladder distention, ventral root stimulation, or microstimulation of S2 segment of the sacral spinal cord were investigated under alpha-chloralose anesthesia in cats with an intact spinal cord and in chronic spinal cord injured (SCI) cats 6-8 weeks after spina...
journal_title：Experimental neurology
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2000.7543
更新日期：2000-12-01 00:00:00
abstract：:In this study, we show that removal of entorhinal cortex (ERC) afferents to hippocampus reduces levels of presenilin 1 (PS1) in the dentate gyrus of APPswe/PS1DeltaE9 transgenic (Tg) mice. PS1 immunoreactivity on the deafferented dentate gyrus decreases by approximately 25% and 50%, 2 and 4 weeks post-lesion compared ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2003.08.018
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abstract：:We investigated the involvement of central nervous system nicotinic-acetylcholine receptors in the secretory activity of the hypothalamic-hypophyseal-adrenal axis. Antiacetylcholine receptor antibodies derived from rabbits immunized with purified Torpedo-acetylcholine receptor or from myasthenia gravis patients were i...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(86)90251-7
更新日期：1986-12-01 00:00:00
abstract：:The purpose of this study was to determine whether or not tooth pulp stimulation in the rat can selectively activate the pulp nerve fibers without excitation of the periodontium and to decide if the nerve fibers situated in the pulp of the rat's incisor are involved in the nociceptive reactions caused by an intrapulpa...
journal_title：Experimental neurology
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更新日期：1986-08-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2008.08.007
更新日期：2008-12-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
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更新日期：1997-12-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(91)90019-9
更新日期：1991-09-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(87)90121-x
更新日期：1987-09-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2004.07.011
更新日期：2005-08-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2000.7524
更新日期：2000-12-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(88)90184-7
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pub_type： 杂志文章
doi：10.1016/0014-4886(89)90091-5
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/s0014-4886(03)00206-1
更新日期：2003-11-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2007.09.023
更新日期：2008-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2007.01.030
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
pub_type： 杂志文章
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pub_type： 杂志文章
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更新日期：2007-02-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1998.6948
更新日期：1998-12-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2011.10.004
更新日期：2012-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1997.6673
更新日期：1998-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2001.7759
更新日期：2001-10-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2013.03.021
更新日期：2013-09-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(83)90035-3
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journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1006/exnr.1994.1017
更新日期：1994-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(87)90233-0
更新日期：1987-06-01 00:00:00
abstract：:Total, Mg2+-, Na+,K+-, and Ca2+-ATPase activities were studied in fresh brain membrane preparations from adult epileptic (El) mice and nonepileptic C57BL/6J (B6) mice. The El mice have an inherited type of temporal lobe epilepsy. No significant differences were observed between the El and B6 mice for any of the ATPase...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(88)90191-4
更新日期：1988-03-01 00:00:00
