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Yu Y, Hu B, Bao J, Mulvany J, Bielefeld E, Harrison RT, Neton SA, Thirumala P, Chen Y, Lei D, Qiu Z, Zheng Q, Ren J, Perez-Flores MC, Yamoah EN, Salehi P. Otoprotective Effects of Stephania tetrandra S. Moore Herb Isolate against Acoustic Trauma. J Assoc Res Otolaryngol 2018; 19:653-668. [PMID: 30187298 PMCID: PMC6249158 DOI: 10.1007/s10162-018-00690-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 07/08/2018] [Indexed: 01/10/2023] Open
Abstract
Noise is the most common occupational and environmental hazard, and noise-induced hearing loss (NIHL) is the second most common form of sensorineural hearing deficit. Although therapeutics that target the free-radical pathway have shown promise, none of these compounds is currently approved against NIHL by the United States Food and Drug Administration. The present study has demonstrated that tetrandrine (TET), a traditional Chinese medicinal alkaloid and the main chemical isolate of the Stephania tetrandra S. Moore herb, significantly attenuated NIHL in CBA/CaJ mice. TET is known to exert antihypertensive and antiarrhythmic effects through the blocking of calcium channels. Whole-cell patch-clamp recording from adult spiral ganglion neurons showed that TET blocked the transient Ca2+ current in a dose-dependent manner and the half-blocking concentration was 0.6 + 0.1 μM. Consistent with previous findings that modulations of calcium-based signaling pathways have both prophylactic and therapeutic effects against neural trauma, NIHL was significantly diminished by TET administration. Importantly, TET has a long-lasting protective effect after noise exposure (48 weeks) in comparison to 2 weeks after noise exposure. The otoprotective effects of TET were achieved mainly by preventing outer hair cell damage and synapse loss between inner hair cells and spiral ganglion neurons. Thus, our data indicate that TET has great potential in the prevention and treatment of NIHL.
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Affiliation(s)
- Yan Yu
- The First People’s Hospital of Zhangjiagang, 68 W Jiyang Road, Zhangjiagang City, 215600 Jiangsu China
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
| | - Bing Hu
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106 USA
- Department of Otolaryngology Head and Neck Surgery, The Second Xiangya Hospital of Central South University, Changsha, 440011 Hunan China
| | - Jianxin Bao
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH 44272 USA
| | - Jessica Mulvany
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH 44272 USA
| | - Eric Bielefeld
- Department of Speech and Hearing Science, Ohio State University, Columbus, OH 43210 USA
| | - Ryan T. Harrison
- Department of Speech and Hearing Science, Ohio State University, Columbus, OH 43210 USA
| | - Sarah A. Neton
- Department of Speech and Hearing Science, Ohio State University, Columbus, OH 43210 USA
| | - Partha Thirumala
- The University of Pittsburgh Medical Center, Suite B-400, 200 Lothrop Street, Pittsburgh, PA 15213 USA
| | - Yingying Chen
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
| | - Debin Lei
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
| | - Ziyu Qiu
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH 44272 USA
| | - Qingyin Zheng
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106 USA
| | - Jihao Ren
- Department of Otolaryngology Head and Neck Surgery, The Second Xiangya Hospital of Central South University, Changsha, 440011 Hunan China
| | - Maria Cristina Perez-Flores
- Department of Physiology and Cell Biology, University of Nevada Reno, 1664 North Virginia St, Reno, NV 89557 USA
| | - Ebenezer N. Yamoah
- Department of Physiology and Cell Biology, University of Nevada Reno, 1664 North Virginia St, Reno, NV 89557 USA
| | - Pezhman Salehi
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
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Liu J, Niu YG, Li WX, Yuan YY, Han WJ, Yu N, Yang SM, Li XQ. Interaction of a calcium channel blocker with noise in cochlear function in guinea pig. Acta Otolaryngol 2012; 132:1140-4. [PMID: 22780109 DOI: 10.3109/00016489.2012.690534] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSIONS Both nifedipine and noise exposure had damaging effects on cochlear function. These damaging effects were subtractive rather than additive, suggesting that calcium channel blockers may have a protective role in noise-induced hearing loss. OBJECTIVE We assessed the interaction of nifedipine, a calcium channel blocker, with noise in cochlear function by evaluating changes in the compound action potential (CAP) threshold after the administration of nifedipine with or without noise exposure. METHODS Eighty guinea pigs were randomly assigned to eight groups based on those with cochlear perfusion with nifedipine only (0, 0.15, 0.5, and 3 µM, groups 1-4) and noise exposure (groups 5-8). CAP thresholds were recorded using a round window electrode before and 120 min after cochlear perfusion. RESULTS Cochlear perfusion of different concentrations of nifedipine caused 2.5, 5.5, 28, and 21.5 dB SPL threshold shift, respectively, at 0, 0.15, 0.5, and 3 µM concentrations (groups 1-4). In comparison, the CAP thresholds after nifedipine perfusion with noise exposure were 43.5, 46.5, 20, and 21.5 dB SPL, respectively, in groups 5-8.
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Affiliation(s)
- Jun Liu
- Department of Otolaryngology Head and Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
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Scheidt RE, Kale S, Heinz MG. Noise-induced hearing loss alters the temporal dynamics of auditory-nerve responses. Hear Res 2010; 269:23-33. [PMID: 20696230 DOI: 10.1016/j.heares.2010.07.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 07/23/2010] [Accepted: 07/31/2010] [Indexed: 11/28/2022]
Abstract
Auditory-nerve fibers demonstrate dynamic response properties in that they adapt to rapid changes in sound level, both at the onset and offset of a sound. These dynamic response properties affect temporal coding of stimulus modulations that are perceptually relevant for many sounds such as speech and music. Temporal dynamics have been well characterized in auditory-nerve fibers from normal-hearing animals, but little is known about the effects of sensorineural hearing loss on these dynamics. This study examined the effects of noise-induced hearing loss on the temporal dynamics in auditory-nerve fiber responses from anesthetized chinchillas. Post-stimulus-time histograms were computed from responses to 50-ms tones presented at characteristic frequency and 30 dB above fiber threshold. Several response metrics related to temporal dynamics were computed from post-stimulus-time histograms and were compared between normal-hearing and noise-exposed animals. Results indicate that noise-exposed auditory-nerve fibers show significantly reduced response latency, increased onset response and percent adaptation, faster adaptation after onset, and slower recovery after offset. The decrease in response latency only occurred in noise-exposed fibers with significantly reduced frequency selectivity. These changes in temporal dynamics have important implications for temporal envelope coding in hearing-impaired ears, as well as for the design of dynamic compression algorithms for hearing aids.
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Affiliation(s)
- Ryan E Scheidt
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
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Uemaetomari I, Tabuchi K, Nakamagoe M, Tanaka S, Murashita H, Hara A. L-Type Voltage-Gated Calcium Channel is Involved in the Pathogenesis of Acoustic Injury in the Cochlea. TOHOKU J EXP MED 2009; 218:41-7. [DOI: 10.1620/tjem.218.41] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Isao Uemaetomari
- Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Keiji Tabuchi
- Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Mariko Nakamagoe
- Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Syuho Tanaka
- Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Hidekazu Murashita
- Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Akira Hara
- Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
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Heinrich UR, Selivanova O, Feltens R, Brieger J, Mann W. Endothelial nitric oxide synthase upregulation in the guinea pig organ of Corti after acute noise trauma. Brain Res 2005; 1047:85-96. [PMID: 15890317 DOI: 10.1016/j.brainres.2005.04.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2004] [Revised: 03/23/2005] [Accepted: 04/12/2005] [Indexed: 12/20/2022]
Abstract
Endothelial nitric oxide synthase (eNOS) upregulation was identified 60 h after acute noise trauma in morphologically intact cells of the reticular lamina in the organ of Corti of the guinea pig in the second turn of the cochlea. Using gold-coupled anti-eNOS antibodies and electron microscopy, it was shown that eNOS expression was upregulated in all cell areas and cell types except inner hair cells. Furthermore, eNOS was found in the organelle-free cytoplasm and in mitochondria of various cell types. The density of eNOS in mitochondria was considerably higher compared with the surrounding cytoplasm. Since eNOS activity is regulated by calcium, the eNOS detection was combined with calcium precipitation, a method for visualizing intracellular Ca2+ distribution. After acute noise trauma, intracellular Ca2+ was increased in all cell types and cell areas except in outer hair cells. Comparing the distribution patterns of eNOS and calcium, significantly elevated levels (P < 0.0001) of eNOS were detected within a 100 nm radius near calcium precipitates in all cuticular structures as well as microtubule-rich regions and Deiters' cells near Hensen cells. The observed colocalization lends support to the postulated mechanism of eNOS activation by Ca2+. eNOS upregulation after acute noise trauma might therefore be part of an induced stress response. The eNOS upregulation in cell areas with numerous microtubule- and actin-rich structures is discussed with respect to possible cytoskeleton-dependent processes in eNOS regulation.
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MESH Headings
- Acoustic Stimulation
- Actin Cytoskeleton/enzymology
- Actin Cytoskeleton/pathology
- Actin Cytoskeleton/ultrastructure
- Animals
- Calcium/metabolism
- Calcium Signaling/physiology
- Cytoplasm/enzymology
- Cytoplasm/pathology
- Cytoplasm/ultrastructure
- Cytoskeleton/enzymology
- Cytoskeleton/pathology
- Cytoskeleton/ultrastructure
- Disease Models, Animal
- Drosophila melanogaster
- Guinea Pigs
- Hair Cells, Auditory/enzymology
- Hair Cells, Auditory/pathology
- Hair Cells, Auditory/ultrastructure
- Hearing Loss, Noise-Induced/enzymology
- Hearing Loss, Noise-Induced/pathology
- Hearing Loss, Noise-Induced/physiopathology
- Immunohistochemistry
- Microscopy, Electron, Transmission
- Microtubules/enzymology
- Microtubules/pathology
- Microtubules/ultrastructure
- Mitochondria/enzymology
- Mitochondria/pathology
- Mitochondria/ultrastructure
- Nitric Oxide Synthase/metabolism
- Nitric Oxide Synthase Type III
- Noise/adverse effects
- Organ of Corti/enzymology
- Organ of Corti/pathology
- Organ of Corti/ultrastructure
- Stress, Physiological/enzymology
- Stress, Physiological/pathology
- Stress, Physiological/physiopathology
- Up-Regulation/physiology
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Affiliation(s)
- Ulf-Rüdiger Heinrich
- Department of Otolaryngology--Head and Neck Surgery, Johannes Gutenberg University Medical School, 55131 Mainz, Germany.
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Heinrich UR, Maurer J, Mann W. Ultrastructural evidence for protection of the outer hair cells of the inner ear during intense noise exposure by application of the organic calcium channel blocker diltiazem. ORL J Otorhinolaryngol Relat Spec 1999; 61:321-7. [PMID: 10545805 DOI: 10.1159/000027693] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Outer hair cells could be protected during intense noise exposure by the application of the calcium channel blocker diltiazem given before and after noise treatment. After various experimental approaches, the ultrastructural morphology was analysed for the different animal populations in the basal part of the second turn of the cochlea, which was the most destroyed area after an acute noise trauma caused by a gun shot (sound pressure at the ear drum 156 dB, frequency maximum between 4 and 6 kHz). Compared to untreated control specimens (experimental animal group I), the outer hair cells in the basal part of the second turn of the cochlea were mostly destroyed without any diltiazem application but after intense noise exposure (group II) or when the calcium channel blocker was given only before (group III) or only after an intense noise exposure (group IV). Only cellular debris of these receptor cells could be identified within this region of the cochlea at the electron-microscopic level. After diltiazem application before and after the intensive noise exposure (group V), the general morphology of the tissue was much better conserved and almost no destroyed outer hair cells were found. But nevertheless, the electron-microscopic analysis revealed that the cellular fine structure was altered. Compared to untreated control specimens, small invaginations were sometimes seen in the basolateral membranes of outer hair cells, and also the cuticular structures of the Deiters cells forming the lamina reticularis bulged into the outer hair cells. To get more information about possible physiological alterations, the amounts of precipitable calcium within the outer hair cells were determined by an image-processing system for the five different populations (groups I-V). The values obtained were compared to the calcium content in specimens which had received diltiazem without any additional noise exposure (group VI) and with an animal population which was exposed to a pure tone for 5 min at 90 dB (group VII). The results are discussed in respect of outer hair cell protection preventing morphological damage and/or physiological alterations.
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MESH Headings
- Acute Disease
- Animals
- Audiometry, Pure-Tone
- Calcium Channel Blockers/pharmacokinetics
- Calcium Channel Blockers/therapeutic use
- Cytoplasm/metabolism
- Cytoplasm/ultrastructure
- Diltiazem/pharmacokinetics
- Diltiazem/therapeutic use
- Disease Models, Animal
- Ear, Inner/metabolism
- Guinea Pigs
- Hair Cells, Auditory, Outer/metabolism
- Hair Cells, Auditory, Outer/ultrastructure
- Hearing Loss, Noise-Induced/diagnosis
- Hearing Loss, Noise-Induced/prevention & control
- Microscopy, Electron
- Noise/adverse effects
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