Publication date: Available online 21 April 2017
Source:Cellular Signalling
Author(s): Mushtaq A. Ansari, Ahmed Nadeem, Sabry M. Attia, Saleh A. Bakheet, Raish Mohammad, Sheikh F. Ahmad
Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder characterized by abnormal social interactions, repetitive behaviors that impair social communication, and circumscribed interests. BTBR T+tf/J (BTBR) inbred mice are generally used as a model for ASD, as they show repetitive behaviors and social deficits that resemble signs of ADS in humans. Adenosine A2A receptors (A2ARs) are considered as potential targets in the treatment of immune, inflammatory, and neurodegenerative diseases. In this study, we investigated the potential effects of the A2A adenosine receptor (A2AR) antagonist SCH 5826 (SCH) and agonist CGS 21680 (CGS) on behavior (self-grooming), hot plate test results, and expression levels of IL-17A+, RORγt+, Foxp3+, and IL-10+ in CD4+ T spleen cells in BTBR and C57BL/6 (B6) mice. We also assessed IL-17A, RORγt, Stat3, pStat3, Foxp3, and IL-10 mRNA and protein expression levels in the brain tissue. The CGS-treated mice showed a significantly altered self-grooming score and a reduced response to the hot plate test. The results further revealed that the SCH efficiently increased the IL-17A+ and RORγt+ expression levels and decreased the Foxp3+ and IL-10+ expression levels in CD4+ cells. However, the treatment with CGS significantly reversed these effects. In addition, CGS significantly decreased the IL-17A, RORγt, Stat3, and pStat3 levels and increased the Foxp3 and IL-10 mRNA and protein expression levels as compared with the BTBR control and SCH treatments. Our results clearly indicate that the CGS A2AR agonist may represent a unique target for future therapeutic strategies for neuroimmune dysfunction.
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