Erythromycin pretreatment induces tolerance against focal cerebral ischemia through up-regulation of nNOS but not down-regulation of HIF-1α in rats.

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Title: Erythromycin pretreatment induces tolerance against focal cerebral ischemia through up-regulation of nNOS but not down-regulation of HIF-1α in rats.
Authors: Lu, Wei-cheng, Li, Guang-yu, Xie, Hui, Qiu, Bo, Yang, Ri-miao, Guo, Zong-ze
Source: Neurological Sciences. May2014, Vol. 35 Issue 5, p687-693. 7p.
Subjects: Erythromycin, Cerebral ischemia, Laboratory rats, Nitric-oxide synthases, Hypoxia-inducible factors, Neurological disorders
Abstract: The purpose of this study was to determine whether the antibiotic erythromycin induces tolerance against focal cerebral ischemia, and the possible underlying mechanism including the involvement of neuronal nitric oxide synthase (nNOS) and hypoxia-inducible factor-1α (HIF-1α). In rat focal cerebral ischemia models, we found that erythromycin preconditioning could significantly decrease the cerebral infarct volume and brain edema. Meanwhile, the neurological deficits from day 4 through 7 after surgery were also remarkably decreased after erythromycin preconditioning. Moreover, erythromycin preconditioning induced significantly increased nNOS levels and decreased HIF-1α levels in both mRNA and protein expression. This study for the first time indicated that erythromycin preconditioning could induce focal brain ischemic tolerance and attenuate brain injury of subsequent transient focal cerebral ischemia. The potential mechanism may be due to up-regulation of nNOS, but the HIF-1α system was not involved. [ABSTRACT FROM AUTHOR]
Copyright of Neurological Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Erythromycin pretreatment induces tolerance against focal cerebral ischemia through up-regulation of nNOS but not down-regulation of HIF-1α in rats.
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  Data: <searchLink fieldCode="AR" term="%22Lu%2C+Wei-cheng%22">Lu, Wei-cheng</searchLink><br /><searchLink fieldCode="AR" term="%22Li%2C+Guang-yu%22">Li, Guang-yu</searchLink><br /><searchLink fieldCode="AR" term="%22Xie%2C+Hui%22">Xie, Hui</searchLink><br /><searchLink fieldCode="AR" term="%22Qiu%2C+Bo%22">Qiu, Bo</searchLink><br /><searchLink fieldCode="AR" term="%22Yang%2C+Ri-miao%22">Yang, Ri-miao</searchLink><br /><searchLink fieldCode="AR" term="%22Guo%2C+Zong-ze%22">Guo, Zong-ze</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Neurological+Sciences%22">Neurological Sciences</searchLink>. May2014, Vol. 35 Issue 5, p687-693. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Erythromycin%22">Erythromycin</searchLink><br /><searchLink fieldCode="DE" term="%22Cerebral+ischemia%22">Cerebral ischemia</searchLink><br /><searchLink fieldCode="DE" term="%22Laboratory+rats%22">Laboratory rats</searchLink><br /><searchLink fieldCode="DE" term="%22Nitric-oxide+synthases%22">Nitric-oxide synthases</searchLink><br /><searchLink fieldCode="DE" term="%22Hypoxia-inducible+factors%22">Hypoxia-inducible factors</searchLink><br /><searchLink fieldCode="DE" term="%22Neurological+disorders%22">Neurological disorders</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The purpose of this study was to determine whether the antibiotic erythromycin induces tolerance against focal cerebral ischemia, and the possible underlying mechanism including the involvement of neuronal nitric oxide synthase (nNOS) and hypoxia-inducible factor-1α (HIF-1α). In rat focal cerebral ischemia models, we found that erythromycin preconditioning could significantly decrease the cerebral infarct volume and brain edema. Meanwhile, the neurological deficits from day 4 through 7 after surgery were also remarkably decreased after erythromycin preconditioning. Moreover, erythromycin preconditioning induced significantly increased nNOS levels and decreased HIF-1α levels in both mRNA and protein expression. This study for the first time indicated that erythromycin preconditioning could induce focal brain ischemic tolerance and attenuate brain injury of subsequent transient focal cerebral ischemia. The potential mechanism may be due to up-regulation of nNOS, but the HIF-1α system was not involved. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Neurological Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10072-013-1584-5
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      – Code: eng
        Text: English
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      – SubjectFull: Laboratory rats
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              Text: May2014
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