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Ibrahim SIA, Xie W, Strong JA, Tonello R, Berta T, Zhang JM. Mineralocorticoid Antagonist Improves Glucocorticoid Receptor Signaling and Dexamethasone Analgesia in an Animal Model of Low Back Pain. Front Cell Neurosci 2018; 12:453. [PMID: 30524245 PMCID: PMC6262081 DOI: 10.3389/fncel.2018.00453] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 11/09/2018] [Indexed: 11/13/2022] Open
Abstract
Low back pain, a leading cause of disability, is commonly treated by epidural steroid injections that target the anti-inflammatory glucocorticoid receptor (GR). However, their efficacy has been controversial. All currently used epidural steroids also activate the pro-inflammatory mineralocorticoid receptor (MR) with significant potency. Local inflammation of the dorsal root ganglia (DRG), a rat model of low back pain, was used. This model causes static and dynamic mechanical allodynia, cold allodynia and guarding behavior (a measure of spontaneous pain), and activates the MR, with pro-nociceptive effects. In this study, effects of local Dexamethasone (DEX; a glucocorticoid used in epidural injections), and eplerenone (EPL; a second generation, more selective MR antagonist) applied to the DRG at the time of inflammation were examined. Mechanical and spontaneous pain behaviors were more effectively reduced by the combination of DEX and EPL than by either alone. The combination of steroids was particularly more effective than DEX alone or the model alone (3-fold improvement for mechanical allodynia) at later times (day 14). Immunohistochemical analysis of the GR in the DRG showed that the receptor was expressed in neurons of all size classes, and in non-neuronal cells including satellite glia. The GR immunoreactivity was downregulated by DRG inflammation (48%) starting on day 1, consistent with the reduction of GR (57%) observed by Western blot, when compared to control animals. On day 14, the combination of DEX and EPL resulted in rescue of GR immunoreactivity that was not seen with DEX alone, and was more effective in reducing a marker for satellite glia activation/neuroinflammation. The results suggest that EPL may enhance the effectiveness of clinically used epidural steroid injections, in part by enhancing the availability of the GR. Thus, the glucocorticoid-mineralocorticoid interactions may limit the effectiveness of epidural steroids through the regulation of the GR in the DRG.
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Affiliation(s)
- Shaimaa I A Ibrahim
- Pain Research Center, Department of Anesthesiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States.,Graduate Program in Molecular, Cellular, and Biochemical Pharmacology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Wenrui Xie
- Pain Research Center, Department of Anesthesiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Judith A Strong
- Pain Research Center, Department of Anesthesiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Raquel Tonello
- Pain Research Center, Department of Anesthesiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Temugin Berta
- Pain Research Center, Department of Anesthesiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Jun-Ming Zhang
- Pain Research Center, Department of Anesthesiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
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Messaoudi S, Gravez B, Tarjus A, Pelloux V, Ouvrard-Pascaud A, Delcayre C, Samuel J, Launay JM, Sierra-Ramos C, de la Rosa DA, Clément K, Farman N, Jaisser F. Aldosterone-Specific Activation of Cardiomyocyte Mineralocorticoid Receptor In Vivo. Hypertension 2013; 61:361-7. [DOI: 10.1161/hypertensionaha.112.198986] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Smail Messaoudi
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Basile Gravez
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Antoine Tarjus
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Véronique Pelloux
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Antoine Ouvrard-Pascaud
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Claude Delcayre
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Janelise Samuel
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Jean-Marie Launay
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Catalina Sierra-Ramos
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Diego Alvarez de la Rosa
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Karine Clément
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Nicolette Farman
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
| | - Fréderic Jaisser
- From Inserm U872, Team 1, Pierre and Marie Curie University, Paris, France (S.M., B.G., A.T., N.F., F.J.); Inserm U872, Team 7, Pierre and Marie Curie University, Paris, France (V.P., K.C.); UMR 644 Inserm-Université de Rouen, Rouen, France (A.O.-P.); Inserm U942, Paris, France (C.D., J.S., J.-M.L.); University of La Laguna, Tenerife, Spain (C.S.-R, D.A.d.l.R.)
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