کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3064042 1580405 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Glucocorticoid sensitization of microglia in a genetic mouse model of obesity and diabetes
ترجمه فارسی عنوان
حساسیت گلوکوکورتیکوئیدی میکروگلاییا در مدل موش های ژنتیکی چاقی و دیابت
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ایمونولوژی
چکیده انگلیسی


• Pharmacological inhibition of corticosterone attenuates microgliosis in db/db mice.
• Metyrapone blocks hippocampal cytokine accumulation in db/db mice.
• Corticosterone sensitizes microglia to ex vivo immune stimulation in db/db mice.

db/db mice are a model of obesity and diabetes due to their lack of functional leptin receptors, which leads to insulin resistance, elevated corticosterone levels, and persistent inflammation. Because stress-induced elevations in glucocorticoids sensitize microglia to immune challenges, we hypothesized that corticosteroids might act similarly in the diabetic brain. To test this hypothesis, db/db and wildtype mice were treated with the glucocorticoid synthesis inhibitor metyrapone every day for 2 weeks. This treatment revealed corticosterone-dependent increases in microglial number and accumulation of the pro-inflammatory cytokines interleukin 1beta and tumor necrosis factor alpha in the hippocampus of db/db mice. Analysis of microglial responses to lipopolysaccharide stimulation revealed that glucocorticoids lower the threshold for release of pro-inflammatory cytokines, underscoring the role of corticosteroids as a precipitating factor for neuroinflammation in obesity and diabetes.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Neuroimmunology - Volume 269, Issues 1–2, 15 April 2014, Pages 20–27
نویسندگان
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