Comparison of the Anti-inflammatory and Anti-nociceptive Effects of Cortistatin-14 and Somatostatin-14 in Distinct In Vitro and In Vivo Model Systems

Springer Science and Business Media LLC - Tập 46 - Trang 40-50 - 2011
Adrienn Markovics1, Éva Szőke1, Katalin Sándor1, Rita Börzsei1, Teréz Bagoly1, Ágnes Kemény1, Krisztián Elekes1, Erika Pintér1,2, János Szolcsányi1,2, Zsuzsanna Helyes1,2
1Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Pécs, Hungary
2PharmInVivo Ltd., Pécs, Hungary

Tóm tắt

We showed that somatostatin (SST) exerts anti-inflammatory and anti-nociceptive effects through somatostatin receptor subtypes 4 and 1 (sst4/sst1). Since cortistatin (CST) is a structurally similar peptide, we aimed at comparing the sst1- and sst4-binding and activating abilities, as well as the effects of SST-14 and CST-14 on inflammatory and nociceptive processes. CST-14 concentration-dependently displaced radiolabeled SST-14 binding, induced similar sst1 and sst4-activation with a less potency, and exerted significantly greater inhibitory effect on endotoxin-stimulated interleukin (IL)-1β production of murine peritoneal macrophages. Capsaicin-induced calcitonin gene-related peptide release from peripheral sensory nerve terminals of isolated rat tracheae was significantly decreased by 2 μM CST and 100 nM SST, but concentration-response correlation was not found. Mustard oil-evoked acute neurogenic plasma protein extravasation in the rat hindpaw skin, carrageenan-induced mouse paw edema, mechanical hyperalgesia, and IL-1β, tumor necrosis factor-α production, as well as mild heat injury-evoked thermal hyperalgesia were similarly attenuated by both peptides. In the latter case, i.pl. and i.p. injections exerted equal inhibitory actions. CST-14 and SST-14 similarly diminish both acute neurogenic and cellular inflammatory processes, as well as mechanical and heat hyperalgesia, in which their inhibitory effect on sensory nerve endings is likely to be involved. However, CST-14 exerts remarkably greater inhibition on cytokine production.

Tài liệu tham khảo

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