کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4342090 | 1295857 | 2006 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Increased density and synapto-protective effect of adenosine A2A receptors upon sub-chronic restraint stress
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
PBSSCH 58261TBSBmaxDPCPXTBS-T1,3-Dipropyl-8-cyclopentylxanthine - 1،3-Dipropyl-8-cyclopentylxanthineXac - XACAdenosine - آدنوزینStress - استرس یا فشار روانیanalysis of variance - تحلیل واریانسANOVA - تحلیل واریانس Analysis of variancemaximal number of binding sites - تعداد حداکثر سایت های اتصالDissociation constant - حد تفکیکphosphate buffer saline - فسفات بافر شورHPA - میلی بار یا هکتوپاسکالhypothalamic–pituitary–adrenal - هیپوتالاموس-هیپوفیز-آدرنالHippocampus - هیپوکامپ Nerve terminals - پایانه های عصبیA1 receptor - گیرنده A1A2A receptor - گیرنده A2A
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Increased density and synapto-protective effect of adenosine A2A receptors upon sub-chronic restraint stress Increased density and synapto-protective effect of adenosine A2A receptors upon sub-chronic restraint stress](/preview/png/4342090.png)
چکیده انگلیسی
Stress initially causes adaptive changes in the brain and can lead to neurodegeneration if continuously present. Noxious brain conditions trigger the release of adenosine that can control brain function and neurodegeneration through inhibitory A1 and facilitatory A2A receptors. We tested the effect of restraint stress on the density of adenosine receptors and their effect on the outcome of stress, focusing in a known affected region, the hippocampus. Sub-chronic restraint stress (6 h/day for 7 days) caused a parallel decrease of the density of A1 receptors (15-20%) and an increase (near 250%) of A2A receptor density in rat hippocampal nerve terminals. This indicates that sub-chronic stress unbalances adenosine receptors, up-regulating A2A and down-regulating A1 receptors. Sub-chronic stress did not cause hippocampal neurodegeneration but decreased the immunoreactivity (immunohistochemistry and Western blot) of a synaptic marker, synaptophysin. The blockade of A2A receptors with 7-(2-phenylethyl)-5-amino-2-(2-furyl)-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidine (0.05 mg/kg, daily i.p. injection) attenuated the loss of synaptophysin immunoreactivity observed in the hippocampus of rats subjected to sub-chronic restraint stress. This ability of A2A receptor antagonists to prevent the earliest stress-induced synaptic modifications provides a neurochemical and morphological correlate for the interest of A2A receptor antagonists to attenuate the burden of chronic stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience - Volume 141, Issue 4, 2006, Pages 1775-1781
Journal: Neuroscience - Volume 141, Issue 4, 2006, Pages 1775-1781
نویسندگان
G.M.A. Cunha, P.M. Canas, C.R. Oliveira, R.A. Cunha,