کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2590665 1131760 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic resonance imaging reveals that galantamine prevents structural brain damage induced by an acute exposure of guinea pigs to soman
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست بهداشت، سم شناسی و جهش زایی
پیش نمایش صفحه اول مقاله
Magnetic resonance imaging reveals that galantamine prevents structural brain damage induced by an acute exposure of guinea pigs to soman
چکیده انگلیسی

Galantamine, a drug used to treat Alzheimer's disease, has recently emerged as a potential medical countermeasure against the toxicity of organophosphorus (OP) compounds, including the nerve agent soman. Here, magnetic resonance imaging (MRI) was used to characterize the neurotoxic effects of soman and the ability of galantamine to prevent these effects in guinea pigs, the best non-primate model to predict the effectiveness of antidotes against OP toxicity in humans. The brains of treated and untreated guinea pigs were imaged using a clinical 3.0 Tesla MRI scanner at 48 h before and 6–7 h, 48 h and 7 days after their challenge with 1.0xLD50 soman (26.6 μg/kg, sc). Significant brain atrophy was observed among all untreated animals at 7 days after their challenge with soman. In mildly intoxicated animals, significant shortening of spin–spin relaxation times (T2) was observed in the thalamus and amygdala at 7 h after the challenge. In severely intoxicated animals, T2 values and T2-weighted signal intensities increased significantly in the piriform cortex, hippocampus, thalamus and amygdala; in most regions, changes were long-lasting. Voxel-based morphometric analysis of the images revealed that other brain regions were also damaged in these animals. Neuronal loss was confirmed histopathologically. In animals that were treated with galantamine (8 mg/kg, im) 30 min prior to the exposure to soman, T2, T2-weighted signal intensities, and CSF volumes were largely unaffected. It is, therefore, concluded that galantamine can effectively prevent the structural brain damage induced by an acute exposure to soman.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroToxicology - Volume 31, Issue 1, January 2010, Pages 67–76
نویسندگان
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