Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise Exposure
Recent progress in hearing loss research has provided strong evidence for the imbalance of cellular redox status and inflammation as common predominant mechanisms of damage affecting the organ of Corti including noise induced hearing loss. The discovery of a protective molecule acting on both mechan...
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doaj-cb1b940559a0459dbe3f65465cb2010e2020-11-24T21:11:59ZengFrontiers Media S.A.Frontiers in Pharmacology1663-98122018-10-01910.3389/fphar.2018.01103409521Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise ExposureFabiola Paciello0Fabiola Paciello1Fabiola Paciello2Anna Rita Fetoni3Anna Rita Fetoni4Anna Rita Fetoni5Rolando Rolesi6Matthew B. Wright7Claudio Grassi8Claudio Grassi9Diana Troiani10Gaetano Paludetti11Gaetano Paludetti12Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, ItalyInstitute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, ItalyInstitute of Cell Biology and Neurobiology, CNR, Rome, ItalyFondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, ItalyInstitute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, ItalyInstitute of Cell Biology and Neurobiology, CNR, Rome, ItalyFondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, ItalyStrekin AG, Basel, SwitzerlandFondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, ItalyInstitute of Human Physiology, Università Cattolica del Sacro Cuore, Rome, ItalyInstitute of Human Physiology, Università Cattolica del Sacro Cuore, Rome, ItalyFondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, ItalyInstitute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, ItalyRecent progress in hearing loss research has provided strong evidence for the imbalance of cellular redox status and inflammation as common predominant mechanisms of damage affecting the organ of Corti including noise induced hearing loss. The discovery of a protective molecule acting on both mechanisms is challenging. The thiazolidinediones, a class of antidiabetic drugs including pioglitazone and rosiglitazone, have demonstrated diverse pleiotrophic effects in many tissues where they exhibit anti-inflammatory, anti-proliferative, tissue protective effects and regulators of redox balance acting as agonist of peroxisome proliferator-activated receptors (PPARs). They are members of the family of ligand regulated nuclear hormone receptors that are also expressed in several cochlear cell types, including the outer hair cells. In this study, we investigated the protective capacity of pioglitazone in a model of noise-induced hearing loss in Wistar rats and the molecular mechanisms underlying this protective effects. Specifically, we employed a formulation of pioglitazone in a biocompatible thermogel providing rapid, uniform and sustained inner ear drug delivery via transtympanic injection. Following noise exposure (120 dB, 10 kHz, 1 h), different time schedules of treatment were employed: we explored the efficacy of pioglitazone given immediately (1 h) or at delayed time points (24 and 48 h) after noise exposure and the time course and extent of hearing recovery were assessed. We found that pioglitazone was able to protect auditory function at the mid-high frequencies and to limit cell death in the cochlear basal/middle turn, damaged by noise exposure. Immunofluorescence and western blot analysis provided evidence that pioglitazone mediates both anti-inflammatory and anti-oxidant effects by decreasing NF-κB and IL-1β expression in the cochlea and opposing the oxidative damage induced by noise insult. These results suggest that intratympanic pioglitazone can be considered a valid therapeutic strategy for attenuating noise-induced hearing loss and cochlear damage, reducing inflammatory signaling and restoring cochlear redox balance.https://www.frontiersin.org/article/10.3389/fphar.2018.01103/fullPPAR agonistacoustic traumaantioxidantantinflammatoryaudiologypersonalized medicine |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fabiola Paciello Fabiola Paciello Fabiola Paciello Anna Rita Fetoni Anna Rita Fetoni Anna Rita Fetoni Rolando Rolesi Matthew B. Wright Claudio Grassi Claudio Grassi Diana Troiani Gaetano Paludetti Gaetano Paludetti |
spellingShingle |
Fabiola Paciello Fabiola Paciello Fabiola Paciello Anna Rita Fetoni Anna Rita Fetoni Anna Rita Fetoni Rolando Rolesi Matthew B. Wright Claudio Grassi Claudio Grassi Diana Troiani Gaetano Paludetti Gaetano Paludetti Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise Exposure Frontiers in Pharmacology PPAR agonist acoustic trauma antioxidant antinflammatory audiology personalized medicine |
author_facet |
Fabiola Paciello Fabiola Paciello Fabiola Paciello Anna Rita Fetoni Anna Rita Fetoni Anna Rita Fetoni Rolando Rolesi Matthew B. Wright Claudio Grassi Claudio Grassi Diana Troiani Gaetano Paludetti Gaetano Paludetti |
author_sort |
Fabiola Paciello |
title |
Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise Exposure |
title_short |
Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise Exposure |
title_full |
Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise Exposure |
title_fullStr |
Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise Exposure |
title_full_unstemmed |
Pioglitazone Represents an Effective Therapeutic Target in Preventing Oxidative/Inflammatory Cochlear Damage Induced by Noise Exposure |
title_sort |
pioglitazone represents an effective therapeutic target in preventing oxidative/inflammatory cochlear damage induced by noise exposure |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Pharmacology |
issn |
1663-9812 |
publishDate |
2018-10-01 |
description |
Recent progress in hearing loss research has provided strong evidence for the imbalance of cellular redox status and inflammation as common predominant mechanisms of damage affecting the organ of Corti including noise induced hearing loss. The discovery of a protective molecule acting on both mechanisms is challenging. The thiazolidinediones, a class of antidiabetic drugs including pioglitazone and rosiglitazone, have demonstrated diverse pleiotrophic effects in many tissues where they exhibit anti-inflammatory, anti-proliferative, tissue protective effects and regulators of redox balance acting as agonist of peroxisome proliferator-activated receptors (PPARs). They are members of the family of ligand regulated nuclear hormone receptors that are also expressed in several cochlear cell types, including the outer hair cells. In this study, we investigated the protective capacity of pioglitazone in a model of noise-induced hearing loss in Wistar rats and the molecular mechanisms underlying this protective effects. Specifically, we employed a formulation of pioglitazone in a biocompatible thermogel providing rapid, uniform and sustained inner ear drug delivery via transtympanic injection. Following noise exposure (120 dB, 10 kHz, 1 h), different time schedules of treatment were employed: we explored the efficacy of pioglitazone given immediately (1 h) or at delayed time points (24 and 48 h) after noise exposure and the time course and extent of hearing recovery were assessed. We found that pioglitazone was able to protect auditory function at the mid-high frequencies and to limit cell death in the cochlear basal/middle turn, damaged by noise exposure. Immunofluorescence and western blot analysis provided evidence that pioglitazone mediates both anti-inflammatory and anti-oxidant effects by decreasing NF-κB and IL-1β expression in the cochlea and opposing the oxidative damage induced by noise insult. These results suggest that intratympanic pioglitazone can be considered a valid therapeutic strategy for attenuating noise-induced hearing loss and cochlear damage, reducing inflammatory signaling and restoring cochlear redox balance. |
topic |
PPAR agonist acoustic trauma antioxidant antinflammatory audiology personalized medicine |
url |
https://www.frontiersin.org/article/10.3389/fphar.2018.01103/full |
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