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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Adenosine A2A, but not A1, receptors mediate the arousal effect of caffeine.

Caffeine, a component of tea, coffee and cola, induces wakefulness. It binds to adenosine A1 and A2A receptors as an antagonist, but the receptor subtype mediating caffeine-induced wakefulness remains unclear. Here we report that caffeine at 5, 10 and 15 mg kg(-1) increased wakefulness in both wild-type mice and A1 receptor knockout mice, but not in A2A receptor knockout mice. Thus, caffeine-induced wakefulness depends on adenosine A2A receptors.[1]

References

  1. Adenosine A2A, but not A1, receptors mediate the arousal effect of caffeine. Huang, Z.L., Qu, W.M., Eguchi, N., Chen, J.F., Schwarzschild, M.A., Fredholm, B.B., Urade, Y., Hayaishi, O. Nat. Neurosci. (2005) [Pubmed]
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