Adenosine

In the extracellular space, ecto-5′-nucleotidase (CD73) dephosphorylates adenosine triphosphate (ATP) to produce adenosine. Adenosine has four receptors namely A1R, A2AR A2BR and A3R. Adenosine plays a key role in the osteogenic differentiation. A1R induces osteoclast differentiation and A2AR induces osteoblast differentiation.

Adenosine has been used:

• as a supplement in embryonic type culture medium for in vitro osteogenic differentiation
• for evaluation of its effect on cell survival by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT assay) and cell proliferation by ³H-thymidine incorporation assay in multi drug resistant glioblastoma stem-like cells (GSCs), and as a standard in high performance liquid chromatography (HPLC).
• as a constituent in collagenase solution for the collagenase digestion of mice fat tissue.

Endogenous neurotransmitter at adenosine receptors. Cardioprotective effects may relate to activation of A₁ adenosine receptors. The antiplatelet and anti−inflammatory actions of adenosine appear to be mediated via the A₂ adenosine receptor. In contrast, adenosine appears to be a pro-inflammatory mediator in asthma and chronic obstructive pulmonary disease (COPD).

Endogenous neurotransmitter. Cardioprotective effects may relate to activation of A₁ adenosine receptors. The antiplatelet and anti−inflammatory actions of adenosine appear to be mediated via the A₂ adenosine receptor. In contrast, adenosine appears to be a pro-inflammatory mediator in asthma and chronic obstructive pulmonary disease (COPD).

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This compound is featured on the Adenylyl cyclases and Phosphoinositide Kinases pages of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.