Atlas One · Host Biology · Scale 03 — Molecular

Adenosine

Purine nucleoside from ATP hydrolysis; A1R (Gi) mediates sleep pressure and neuroprotection; A2AR (Gs) modulates striatal dopamine via D2R heterodimers. Caffeine (A1R/A2AR antagonist) promotes wakefulness; istradefylline (A2AR antagonist) adjuncts levodopa in Parkinson's.

Also known as: purine, purinergic signaling, ADORA1, ADORA2A, adenosine receptor, sleep pressure, homeostatic sleep drive

Scale 03 — MolecularScale
draftStatus
2026-06-08Last Reviewed
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adenosine

Adenosine

Purine nucleoside from ATP hydrolysis; A1R (Gi) mediates sleep pressure and neuroprotection; A2AR (Gs) modulates striatal dopamine via D2R heterodimers. Caffeine (A1R/A2AR antagonist) promotes wakefulness; istradefylline (A2AR antagonist) adjuncts levodopa in Parkinson's.