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https://www.selleckchem.com/products/skf-34288-hydrochloride.html BACKGROUND AND AIMS While triptans are used to treat migraine, there is evidence that they also reduce inflammation induced pain at the spinal level. The cellular mechanisms underlying this spinal enhancement are unknown. We examined whether inflammation alters sumatriptan modulation of synaptic transmission in the rat spinal dorsal horn. EXPERIMENTAL APPROACH 3 - 4 days following intraplantar injection of complete Freund's adjuvant (CFA), or saline, whole cell recordings of evoked glutamatergic excitatory postsynaptic currents (EPSCs) were made from lumbar lamina I - II dorsal horn neurons in rat spinal slices. KEY RESULTS In 2-3 week old animals, sumatriptan reduced the amplitude of evoked EPSCs and this was greater in slices from CFA, compared to saline-injected rats. In CFA-injected animals, sumatriptan increased the paired-pulse ratio of evoked EPSCs and reduced the rate of spontaneous miniature EPSCs. The 5-HT1B and 5-HT1D agonists CP93129 and PNU109291 both inhibited evoked EPSCs in CFA, but not saline-injected rats. By contrast, the 5-HT1A agonist R(+)-8-OH-DPAT inhibited evoked EPSCs in saline, but not CFA-injected rats. In CFA-injected rats, the sumatriptan induced inhibition of evoked EPSCs was reduced by the 5-HT1B and 5-HT1D antagonists NAS181 and BRL15572. Intriguingly, the difference in sumatriptan inhibition between CFA and saline-injected animals was only observed in animals less than four weeks old. CONCLUSIONS AND IMPLICATIONS These findings indicate that inflammation induces a developmentally regulated 5-HT1B/D presynaptic inhibition of excitatory transmission into the rat superficial dorsal horn. Thus, triptans could potentially act as spinal analgesic agents for inflammatory pain in the juvenile setting. This article is protected by copyright. All rights reserved.Attention-deficit/hyperactivity disorder (ADHD) is the most commonly diagnosed mental disorder in children and a small

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