共 35 条
Doxycycline reduces cleaved caspase-3 and microglial activation in an animal model of neonatal hypoxia-ischemia
被引:70
作者:

Jantzie, LL
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机构: Univ Alberta, Dept Psychiat, Neurochem Res Unit, Edmonton, AB T6G 2K7, Canada

Cheung, PY
论文数: 0 引用数: 0
h-index: 0
机构: Univ Alberta, Dept Psychiat, Neurochem Res Unit, Edmonton, AB T6G 2K7, Canada

Todd, KG
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Alberta, Dept Psychiat, Neurochem Res Unit, Edmonton, AB T6G 2K7, Canada Univ Alberta, Dept Psychiat, Neurochem Res Unit, Edmonton, AB T6G 2K7, Canada
机构:
[1] Univ Alberta, Dept Psychiat, Neurochem Res Unit, Edmonton, AB T6G 2K7, Canada
[2] Univ Alberta, Dept Pediat, Edmonton, AB T6G 2K7, Canada
关键词:
hypoxia-ischemia;
doxycycline;
microglia;
apoptosis;
inflammation;
caspases;
D O I:
10.1038/sj.jcbfm.9600025
中图分类号:
R5 [内科学];
学科分类号:
1002 ;
100201 ;
摘要:
Neonatal hypoxia-ischemia (HI) is a major contributor to many perinatal neurologic disorders and, thus, the search for therapies and effective treatments for the associated brain damage has become increasingly important. The tetracycline derivative, doxycycline (DOXY), has been reported to be neuroprotective in adult animal models of cerebral ischemia. To investigate the putative neuroprotective effects of DOXY in an animal model of neonatal Hl, a time-course study was run such that pups received either DOXY (10 mg/kg) or VEH immediately before hypoxia, 1, 2, or 3 hours after Hl (n = 6). At 7 days after injury, the pups were euthanized, and the brains were removed and processed for immunohistochemical and Western blot analyses using antibodies against specific markers for neurons, apoptotic markers, microglia, oligodendrocytes, and astrocytes. Results showed that in vulnerable brain regions including the hippocampal formation, thalamus, striatum, cerebral cortex and white matter tracts, DOXY significantly decreased caspase-3 immunoreactivity (a marker of apoptosis), promoted neuronal survival, inhibited microglial activation and reduced reactive astrocytosis compared with VEH-treated Hl pups. These effects were found to occur in a time-dependent manner. Taken together, these results strongly suggest that doxycycline has potential as a pharmacological treatment for mild HI in neonates.
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页码:314 / 324
页数:11
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