Improving Outcomes of Neuroprotection by Minocycline
Identifieur interne : 001A32 ( Main/Exploration ); précédent : 001A31; suivant : 001A33Improving Outcomes of Neuroprotection by Minocycline
Auteurs : Mengzhou Xue [Canada] ; Elena I. Mikliaeva [Canada] ; Steve Casha [Canada] ; David Zygun [Canada] ; Andrew Demchuk [Canada] ; V. Wee Yong [Canada]Source :
- The American Journal of Pathology [ 0002-9440 ] ; 2010.
Abstract
Minocycline ameliorates deficits in models of acute and chronic neurological diseases, but many publications do not replicate these results. We tested the hypothesis that a key factor in achieving neurological benefits is the exposure of neural cells to local high concentrations of minocycline. This hypothesis was evaluated by using human neurons in culture and in a mouse model of intracerebral hemorrhage (ICH). In culture, neurons were very vulnerable to blood-induced toxicity, with 60% lost within 24 hours in an environment of 5% blood in culture medium. Minocycline reduced blood-induced neurotoxicity in a concentration-dependent manner.
Url:
DOI: 10.2353/ajpath.2010.090361
PubMed: 20110416
PubMed Central: 2832142
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en"><p>Minocycline ameliorates deficits in models of acute and chronic neurological diseases, but many publications do not replicate these results. We tested the hypothesis that a key factor in achieving neurological benefits is the exposure of neural cells to local high concentrations of minocycline. This hypothesis was evaluated by using human neurons in culture and in a mouse model of intracerebral hemorrhage (ICH). In culture, neurons were very vulnerable to blood-induced toxicity, with 60% lost within 24 hours in an environment of 5% blood in culture medium. Minocycline reduced blood-induced neurotoxicity in a concentration-dependent manner. <bold><italic>In vivo</italic>
</bold>
, the introduction of blood into the striatum of mice to simulate ICH resulted in a massive lesion by 24 hours. When minocycline was mixed with the blood used to inflict ICH, the resulting extent of neuropathology was significantly less than that achieved with intraperitoneal administration of medication. The combination of intracerebral and intraperitoneal minocycline improved neuroprotection compared with either alone. We then delayed minocycline treatment and injected it into the hematoma 1 hour after ICH. We found greater alleviation of brain damage and neuronal death with increasing concentrations of minocycline injected locally, which was reflected in limited behavioral and histological recovery. We conclude that the prospect of neuroprotection with minocycline is improved by high concentrations of minocycline delivered locally into the central nervous system with supplementation from systemic administration.</p>
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