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Open Access Adenosine and Dopamine Receptor Interactions in Striatum and Caffeine-induced Behavioral Activation

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This review will examine how dopamine, a monoamine neurotransmitter, and adenosine, a neuromodulator, regulate behavioral activation, primarily as reflected by locomotor activity, in rodents. Complex interactions among 2 major types of adenosine receptors (A1AR and A2AAR) and 2 dopamine receptors (D1R and D2R) occur due to physical interactions that alter their ligand-binding properties and subsequent effects on common postreceptor signaling molecules. The output from these interactions in striatum modulates neurotransmission and subsequently influences spontaneous locomotor activity. Caffeine is a nonselective adenosine receptor antagonist that blocks 2 major types of adenosine receptors, A1AR and A2AAR, in the brain. Pharmacologic manipulation of these receptors with drugs such as caffeine offers potential therapeutic benefit for treatment of Parkinson disease.

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Document Type: Miscellaneous

Publication date: 2007-12-01

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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