- in which it acts as a modulator of the cAMP pathway. (jneurosci.org)
- As tryptophan 2,3-dioxygenase (TDO) and indoleamine 2,3-dioxygenase (IDO), which convert tryptophan to kynurenine, are rate-limiting enzymes of the kynurenine pathway, we screened TDO or IDO inhibitors for effects on the production of proinflammatory cytokines in a mouse macrophage cell line. (bvsalud.org)
- In addition to the D1 receptor/PKA/DARPP-32 signaling pathway, D1 receptor stimulation is known to activate Rap1/ERK signaling. (bvsalud.org)
- Activation of CB1 receptors, either by an agonist or by inhibition of reuptake of endogenous cannabinoids, stimulates phosphorylation at Thr34, thereby converting DARPP-32 into an inhibitor of protein phosphatase-1. (jneurosci.org)
- The activity, localization, and substrate specificity of the protein phosphatase 2A (PP2A) heterotrimer are controlled by various regulatory B subunits. (frontiersin.org)
- Protein phosphatase 2A (PP2A) is an enzyme that specifically removes phosphates from serine and threonine residues and is essential for various signaling pathways involved in cell development and growth ( 1 , 2 ). (frontiersin.org)
- DARPP-32, phosphorylated at Thr34 by PKA, inhibits protein phosphatase 1 (PP1), and amplifies the phosphorylation of other PKA/PP1 substrates following D1 receptor activation. (bvsalud.org)
- Here, we report that the motor depressant effect produced by the cannabinoid receptor agonist (-)-cis-3-[2-hydroxy-4-(1,1-dimethylheptyl)phenyl]trans-4-(3-hydroxypropyl)cyclohexanol (CP55,940) is attenuated by genetic inactivation of the dopamine- and cAMP-regulated phosphoprotein of 32 kDa (DARPP-32), which is abundantly expressed in the medium spiny neurons of the striatum. (jneurosci.org)
- The endocannabinoid system has been shown to exert both negative and positive control on striatal dopamine D 2 receptor transmission. (jneurosci.org)
- Dopamine regulates psychomotor function by D1 receptor/PKA-dependent phosphorylation of DARPP-32. (bvsalud.org)
- Our results suggest that PP2A-PR72 plays an important role in regulating cardiac contractile function and Ca 2+ cycling, indicating that the upregulation of PR72 in heart failure is an attempt to compensate functionally. (frontiersin.org)
- This, in turn, prevents dephosphorylation of downstream target proteins, thereby amplifying the effects produced by activation of the cAMP/PKA cascade ( Greengard, 2001 ). (jneurosci.org)