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

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Adenosine A1 receptors inhibit both adenylate cyclase activity and TRH-activated Ca2+ channels by a pertussis toxin-sensitive mechanism in GH3 cells.

The present study has examined the effects of adenosine A1 receptors on second messenger processes in GH3 cells. A1 receptors are present which are shown to inhibit adenylate cyclase in a GTP-requiring manner. Hormone (VIP) stimulation is also absolutely required for the observation of inhibition. Adenosine A1 receptor analogues also inhibit TRH-stimulated [Ca2+]i-mobilization in GH3 cells. Both effects of the adenosine receptor agonists are apparently mediated by pertussis toxin substrates, of which there are two--41,000 and 40,000 daltons respectively--in these cells. Somatostatin exerts analogous effects to the adenosine agonists in GH3 cells. Thus it may turn out that a general property of 'cyclase inhibitory receptors' is also to inhibit [Ca2+]i-mobilization in the same cells, when such mechanisms are present.[1]

References

  1. Adenosine A1 receptors inhibit both adenylate cyclase activity and TRH-activated Ca2+ channels by a pertussis toxin-sensitive mechanism in GH3 cells. Cooper, D.M., Caldwell, K.K., Boyajian, C.L., Petcoff, D.W., Schlegel, W. Cell. Signal. (1989) [Pubmed]
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