Abstract:
:Adrenomedullin (AM) has been shown to protect against ischemia/reperfusion-induced myocardial infarction and apoptosis. In the present study, we examined the potential neuroprotective action of delayed AM gene transfer in cerebral ischemia. Three days after a 1-hr occlusion of the middle cerebral artery (MCAO), rats were injected intravenously with adenovirus harboring human AM cDNA. The experiment was terminated 7 days after MCAO. AM gene transfer significantly reduced cerebral infarct size compared with that of rats before virus injection and compared with that of rats injected with control virus. The expression of recombinant human AM was identified in ischemic brain by immunostaining. Morphological analyses showed that AM gene transfer enhanced the survival and migration of astrocytes into the ischemic core. Cerebral ischemia markedly increased astrocyte apoptosis, and AM gene delivery significantly reduced apoptosis to near normal levels as seen in sham control rats. Similarly, in primary cultured astrocytes, AM stimulated cell migration and inhibited hypoxia/reoxygenation-induced apoptosis. The effects of AM on both migration and apoptosis were abolished by calcitonin gene-related peptide [CGRP(8-37)], an AM receptor antagonist. Enhanced cell survival after AM gene transfer was accompanied by markedly increased cerebral nitric oxide and Bcl-2 levels, as well as Akt and GSK-3beta phosphorylation, but reduced NADPH oxidase activity and superoxide production. Inactivation of GSK-3beta by phosphorylation led to reduced GSK-3beta activity and caspase- 3 activation. These results indicate that exogenous AM provides neuroprotection against cerebral ischemia injury by enhancing astrocyte survival and migration and inhibiting apoptosis through suppression of oxidative stress-mediated signaling events.
journal_name
Hum Gene Therjournal_title
Human gene therapyauthors
Xia CF,Yin H,Borlongan CV,Chao J,Chao Ldoi
10.1089/hum.2004.15.1243keywords:
subject
Has Abstractpub_date
2004-12-01 00:00:00pages
1243-54issue
12eissn
1043-0342issn
1557-7422journal_volume
15pub_type
杂志文章abstract::Clinical gene transfer research has involved adult and child subjects, and it is expected that gene transfer in fetal subjects will occur in the future. Some genetic diseases have serious adverse effects on the fetus before birth, and there is hope that prenatal gene therapy could prevent such disease progression. Res...
journal_title:Human gene therapy
pub_type: 杂志文章
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更新日期:2011-11-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1998.9.6-771
更新日期:1998-04-10 00:00:00
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更新日期:2020-10-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1996.7.9-1085
更新日期:1996-06-10 00:00:00
abstract::The optimal stem cell source for stem cell gene therapy has not been defined. Most gene transfer studies have used peripheral blood or marrow repopulating cells collected after administration of granulocyte colony-stimulating factor and stem cell factor (G-CSF/SCF). For clinical applications, however, growth factor ad...
journal_title:Human gene therapy
pub_type: 杂志文章
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journal_title:Human gene therapy
pub_type: 杂志文章
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更新日期:1997-05-20 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,多中心研究
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更新日期:2006-12-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1994.5.7-853
更新日期:1994-07-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1998.9.12-1701
更新日期:1998-08-10 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2008.144
更新日期:2009-07-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1998.9.7-1093
更新日期:1998-05-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1995.6.5-635
更新日期:1995-05-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2006.17.117
更新日期:2006-01-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章,评审
doi:10.1089/hum.2009.092
更新日期:2009-08-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2010.157
更新日期:2011-05-01 00:00:00
abstract::Despite efforts toward improvements in retrovirus-mediated gene transfer, stable high-level expression of a therapeutic gene in human hematopoietic stem cells remains a great challenge. We have evaluated the efficiency of different viral long terminal repeats (LTRs) in long-term expression of a transgene in vivo, usin...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/104303401450942
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journal_title:Human gene therapy
pub_type: 杂志文章
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更新日期:2020-02-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1991.2.3-203
更新日期:1991-10-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
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journal_title:Human gene therapy
pub_type: 杂志文章,评审
doi:10.1089/hum.2015.139
更新日期:2016-02-01 00:00:00
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pub_type: 杂志文章
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2005.16.1267
更新日期:2005-11-01 00:00:00
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journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/104303402760293619
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pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
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pub_type: 杂志文章
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更新日期:1996-01-20 00:00:00
abstract::Adenovirus-polylysine-DNA complexes were evaluated for their capacity to accomplish direct in vivo gene transfer to airway epithelium employing a rodent model. Binary complexes containing transferrin or adenovirus, or combination complexes containing both transferrin and adenovirus, were evaluated. The highest in vitr...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1993.4.1-17
更新日期:1993-02-01 00:00:00