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Figure 2 | BMC Cell Biology

Figure 2

From: S-Nitrosothiols modulate G protein-coupled receptor signaling in a reversible and highly receptor-specific manner

Figure 2

GSNO modulates GPCR signaling in a dose-dependent manner. [35S]GTPγS autoradiography was conducted using a 3-step protocol with DPCPX (10-6 M) present throughout steps 2 and 3, as detailed in the Methods section. GSNO was present at the indicated concentrations for 60 min during the GDP loading (step 2). Carbachol (CCh, 10-4 M), 2MeSADP (10-6 M) or LPA (5 × 10-5 M in 0.1% fatty acid free BSA) were present in step 3. Note dose-dependent amplification of CCh-stimulated G protein activity, most evident at this coronal plane in the cerebral cortex (Cx), the striatum (Str), and the thalamus (Thal). Note also dose-related attenuation of 2MeSADP- and LPA-stimulated responses, especially in the white matter regions, including the corpus callosum (cc), the fimbria of the hippocampus (fi), and the striatal white matter (Sw). Scale bar = 2 mm. For quantitative data on selected brain regions, see Supplementary Figs. 1 and 2 in additional file 1.

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