نتایج جستجو برای: گیرنده a2a آدنوزینی
تعداد نتایج: 8040 فیلتر نتایج به سال:
سابقه و هدف: هیپوکمپ یکی از حساس ترین نواحی مغز در ایجاد فعالیت صرعی می باشد و تحقیقات زیادی در رابطه با تاثیر مواد مختلف بر شدت تشنجهای ناشی از فعالیت نورونهای هیپوکمپ در حال انجام است. در این تحقیق اثر تزریق داخل صفاقی N6 – سیکلوهگزیل آدنوزین (CHA) آگونیست اختصاصی گیرنده های آدنوزینی A1 و 1-3 دی متیل – 8 – سیکلوپنتیل گزانتین (CPT)، آنتاگونیست اختصاصی این گیرنده ها در حیواناتی که با تحریک الکت...
Evidence for heteromeric receptor complexes comprising adenosine A2A and metabotropic glutamate 5 (mGlu5) receptors in striatum has raised the possibility of synergistic interactions between striatal A2A and mGlu5 receptors. We investigated the role of striatal A2A receptors in the locomotor stimulant and antiparkinsonian properties of mGlu5 antagonists using complementary pharmacologic and gen...
Adenosine receptors are G-protein coupled P1 purinergic receptors that are broadly expressed in the peripheral immune system, vasculature, and the central nervous system (CNS). Within the immune system, adenosine 2A (A2A) receptor-mediated signaling exerts a suppressive effect on ongoing inflammation. In healthy CNS, A2A receptors are expressed mainly within the neurons of the basal ganglia. Al...
Objective(s): For determining the mechanism of anti-asthmatic effect of thymoquinone, this investigation evaluated the effect of thymoquinone in the presence of selective A2A and A2B adenosine receptor antagonists (ZM241385 and MRS1706, respectively). Materials and Methods: Seventy guinea pigs were randomly divided to 7 groups; control (C), sensitized with ovalbumin (S), sensitized groups pretr...
OBJECTIVE To investigate striatal adenosine A2A receptor availability in patients with Parkinson disease (PD) with and without levodopa-induced dyskinesias (LIDs). While providing effective relief from the motor symptoms of PD, chronic levodopa use is associated with development of LIDs. A2A receptors are expressed on the bodies of indirect pathway medium spiny striatal neurons and on dopamine ...
Recently evidence has been presented that adenosine A2A and dopamine D2 receptors form functional heteromeric receptor complexes as demonstrated in human neuroblastoma cells and mouse fibroblast Ltk- cells. These A2A/D2 heteromeric receptor complexes undergo coaggregation, cointernalization, and codesensitization on D2 or A2A receptor agonist treatments and especially after combined agonist tre...
Background :Adenosine is an endogenous purine nucleoside that has a neuromodulatory role in the central nervous system. The amphetamine derivative (±)-3,4-methylenedioxymethamphetamine (MDMA or ecstasy) is a synthetic amphetamine analogue used recreationally to obtain an enhanced affiliated emotional response. MDMA is a potent monoaminergic neurotoxin with the potential of damage to brain neu...
We have previously reported that phosphorylation of adenylyl cyclase type VI (AC6) may result in the suppression of adenylyl cyclase activity during desensitization of the A2a-adenosine receptor-mediated cAMP response (A2a desensitization) in rat pheochromocytoma PC12 cells. In the present study, we demonstrate that protein kinase C (PKC) is responsible for the phosphorylation and inhibition of...
The absence of adenosine A2A receptors, or its pharmacological inhibition, has neuroprotective effects. Experimental data suggest that glial A2A receptors participate in neurodegeneration induced by A2A receptor stimulation. In this study we have investigated the effects of A2A receptor stimulation on control and activated glial cells. Mouse cortical mixed glial cultures (75% astrocytes, 25% mi...
Koos BJ. Adenosine A2a receptors and O2 sensing in development. Am J Physiol Regul Integr Comp Physiol 301: R601–R622, 2011. First published June 15, 2011; doi:10.1152/ajpregu.00664.2010.—Reduced mitochondrial oxidative phosphorylation, via activation of adenylate kinase and the resulting exponential rise in the cellular AMP/ATP ratio, appears to be a critical factor underlying O2 sensing in ma...
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