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Shahtaheri SJ, Goodarzi Z, Karami E, Khavanin A, Khansari MG, Kiani M, Rashidy-Pour A. Effects of acute exposure to Al 2O 3-NPs (α and γ) and white noise and their combination on cochlea structure and function in Wistar rats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:89859-89876. [PMID: 37460886 DOI: 10.1007/s11356-023-28745-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 07/07/2023] [Indexed: 08/11/2023]
Abstract
Hearing loss induced by noise and combinations of factors is a common occupational disease among workers. This study aimed to investigate the impact of acute exposure to white noise and Al2O3 NPs, alone and in combination, on changes in the hearing and structural functions of the cochlea in rats. Thirty-six rats were randomly assigned to one of six groups: Control, acute exposure to white noise, exposure to γ-Al2O3 NPs, exposure to noise plus γ-Al2O3 NPs, exposure to α-Al2O3 NPs, and exposure to the combination of noise plus α-Al2O3 NPs. TTS and PTS were examined using DPOAE, while oxidative index (MDA, GSH-Px), gene expression (NOX3, TGF-ß, CYP1A1), protein expression (ß-Tubulin, Myosin VII), and histopathological changes were examined in the cochlea. The morphology of Al2O3 NPs was examined by TEM. The results of the DPOAE test showed a significant increase in TTS in all groups and an increase in PTS in the groups exposed to noise, γ-Al2O3 NPs, and a combination of noise plus Al2O3 NPs (P < 0.05). In the group exposed to white noise plus Al2O3 NPs, the MDA levels increased, the level of GSH-Px decreased, and the expression percentage of ß-Tubulin and Myosin VII decreased, while the expression of NOX3, TGF-ß, and CYP1A1 (except for the α-Al2O3 NPs group) significantly increased (P < 0.05). Histopathological changes of the cochlea indicated damage to hair and ganglion cells, which was more severe in the combined exposure group. The combined and independent exposure to white noise and Al2O3 NPs damaged hair and ganglion cells for high-frequency perception, affecting the function and structure of the cochlea and leading to TTS and PTS.
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Affiliation(s)
- Seyed Jamaleddin Shahtaheri
- Department of Occupational Health Engineering, School of Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Goodarzi
- Department of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Esmaeil Karami
- Department of Occupational Health Engineering, School of Health, Tehran University of Medical Sciences, Tehran, Iran.
| | - Ali Khavanin
- Department of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mahmoud Ghazi Khansari
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehrafarin Kiani
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ali Rashidy-Pour
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran
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Motesadi Zarandi M, Rabbani Z, Rabbani Anari M, Kouhi A, Zeinaloo M. A study of efficacy of nigella sativa in treatment of Meniere's disease: A randomized, placebo controlled clinical trial. J Otol 2023; 18:97-100. [PMID: 37153706 PMCID: PMC10159751 DOI: 10.1016/j.joto.2023.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 02/07/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
Purpose Meniere's disease (MD), first introduced by Prosper Meniere, is characterized mainly by vertigo, tinnitus, aural fullness and sensorineural hearing loss. Though the exact pathophysiology of MD is unknown, immunologic and inflammatory interactions are possible underlying mechanisms involved in MD. This study is aimed to investigate the immunomodulatory and anti-inflammatory effect of Nigella sativa on MD as a therapeutic agent. Methods We divided 40 patients with definite MD into two groups of 20 cases. The study group received 1 g of Nigella sativa oil daily for three months and the control group received a placebo. Changes in hearing, tinnitus and vertigo were estimated by pure tone audiometry, tinnitus handicap inventory questionnaire and dizziness handicap inventory questionnaire, respectively. Results At the end of the study we did not observe any significant improvement in study's group hearing threshold, tinnitus and vertigo compared to the control group. Conclusions In this study, statistical analysis showed that Nigella sativa failed to improve signs and symptoms of MD. However, further investigations with a larger study population are needed to ascertain the current conclusion.
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Affiliation(s)
- Masoud Motesadi Zarandi
- Department of Cochlear Implant and Otorhinolaryngology, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Rabbani
- Amir Alam Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Corresponding author. E.N.T Department, Amiralam Hospital, Saadi Ave, Tehran, Iran.
| | - Mahtab Rabbani Anari
- Otorhinolaryngology Research Center, Amir Alam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Kouhi
- Otorhinolaryngology Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Otorhinolaryngology and Head and Neck Surgery, Amir Alam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mona Zeinaloo
- Department of Community Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Abd-Elhakim YM, Abdel-Motal SM, Malhat SM, Mostafa HI, Ibrahim WM, Beheiry RR, Moselhy AAA, Said EN. Curcumin attenuates gentamicin and sodium salicylate ototoxic effects by modulating the nuclear factor-kappaB and apoptotic pathways in rats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:89954-89968. [PMID: 35859240 PMCID: PMC9722864 DOI: 10.1007/s11356-022-21932-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 07/05/2022] [Indexed: 05/24/2023]
Abstract
This study aimed to investigate the effectiveness of curcumin (CCM) against gentamicin (GEN) and sodium salicylates (NaS)-induced ototoxic effects in rats. For 15 consecutive days, seven rat groups were given 1 mL/rat physiological saline orally, 1 mL/rat olive oil orally, 50 mg/kg bwt CCM orally, 120 mg/kg bwt GEN intraperitoneally, 300 mg/kg bwt NaS intraperitoneally, CCM+GEN, or CCM+NaS. The distortion product otoacoustic emission measurements were conducted. The rats' hearing function and balance have been behaviorally assessed using auditory startle response, Preyer reflex, and beam balance scale tests. The serum lipid peroxidation and oxidative stress biomarkers have been measured. Immunohistochemical investigations of the apoptotic marker caspase-3 and the inflammatory indicator nuclear factor kappa (NF-κB) in cochlear tissues were conducted. GEN and NaS exposure resulted in deficit hearing and impaired ability to retain balance. GEN and NaS exposure significantly decreased the reduced glutathione level and catalase activity but increased malondialdehyde content. GEN and NaS exposure evoked pathological alterations in cochlear and vestibular tissues and increased caspase-3 and NF-κB immunoexpression. CCM significantly counteracted the GEN and NaS injurious effects. These outcomes concluded that CCM could be a naturally efficient therapeutic agent against GEN and NaS-associated ototoxic side effects.
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Affiliation(s)
- Yasmina M Abd-Elhakim
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt.
| | - Sabry M Abdel-Motal
- Department of Pharmacology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Seham M Malhat
- Department of Pharmacology, Animal health research institute, Zagazig, Egypt
| | - Hend I Mostafa
- Department of Pharmacology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Walied M Ibrahim
- Audiology unit, Otorhinolaryngology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Rasha R Beheiry
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Attia A A Moselhy
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Enas N Said
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
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Gedik Ö, Doğan R, Babademez MA, Karataş E, Aydın MŞ, Koçyiğit A, Eşrefoğlu M, Özturan O. Therapeutic effects of metformin for noise induced hearing loss. Am J Otolaryngol 2020; 41:102328. [PMID: 31732304 DOI: 10.1016/j.amjoto.2019.102328] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/26/2019] [Accepted: 10/29/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE This study aimed to investigate the healing effect of metformin on noise induced hearing loss (NIHL) by measuring audiological, biochemical and histological parameters. MATERIALS AND METHODS 32 rats were divided into four groups (Group 1: Noise, Group 2: Noise + Metformin, Grup 3: Metformin, Grup 4: Control). Broadband noise was applied to Group 1 and Group 2 after basal measurements. Measuring audiological (distortion product otoacoustic emission (DPOAE) and Auditory Brainstem Response (ABR)), biochemical (total antioxidant status (TAS), total oxidant status (TOS), oxidative status index (OSI), DNA damage, IL-1 beta, IL-6, TNF alfa, HSF-1 and COX-2) and histological parameters. RESULTS Group 2 had significant decreases in ABR thresholds on day 7 and day 14 compared to day 1. DPOAE values of Group 2 on the 7th and 14th days were significantly higher than the post-noise levels. DNA damage, TOS and OSI values of Group 1 were significantly higher than the other groups. The Cox-2 value of Group 1 was higher than all other groups. The HSF-1 value of Group 2 was significantly higher than that of Group 1. In terms of IL-1 Beta, IL-6 and TNF-alpha values, there was no significant difference between groups 2, 3 and 4 and these values were significantly lower than group 1. In histopathological results of our study, no significant difference was found between the groups being exposed to noise and the control group. CONCLUSION This study showed that early period of Metformin treatment has therapeutic effect on NIHL.
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Escabi CD, Frye MD, Trevino M, Lobarinas E. The rat animal model for noise-induced hearing loss. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2019; 146:3692. [PMID: 31795685 PMCID: PMC7480078 DOI: 10.1121/1.5132553] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Rats make excellent models for the study of medical, biological, genetic, and behavioral phenomena given their adaptability, robustness, survivability, and intelligence. The rat's general anatomy and physiology of the auditory system is similar to that observed in humans, and this has led to their use for investigating the effect of noise overexposure on the mammalian auditory system. The current paper provides a review of the rat model for studying noise-induced hearing loss and highlights advancements that have been made using the rat, particularly as these pertain to noise dose and the hazardous effects of different experimental noise types. In addition to the traditional loss of auditory function following acoustic trauma, recent findings have indicated the rat as a useful model in observing alterations in neuronal processing within the central nervous system following noise injury. Furthermore, the rat provides a second animal model when investigating noise-induced cochlear synaptopathy, as studies examining this in the rat model resemble the general patterns observed in mice. Together, these findings demonstrate the relevance of this animal model for furthering the authors' understanding of the effects of noise on structural, anatomical, physiological, and perceptual aspects of hearing.
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Affiliation(s)
- Celia D Escabi
- Callier Center for Communication Disorders, School of Behavioral and Brain Sciences, University of Texas at Dallas, Dallas, Texas 75080, USA
| | - Mitchell D Frye
- Callier Center for Communication Disorders, School of Behavioral and Brain Sciences, University of Texas at Dallas, Dallas, Texas 75080, USA
| | - Monica Trevino
- Callier Center for Communication Disorders, School of Behavioral and Brain Sciences, University of Texas at Dallas, Dallas, Texas 75080, USA
| | - Edward Lobarinas
- Callier Center for Communication Disorders, School of Behavioral and Brain Sciences, University of Texas at Dallas, Dallas, Texas 75080, USA
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The effect of intratympanic oxytocin treatment on rats exposed to acoustic trauma. The Journal of Laryngology & Otology 2019; 133:466-476. [PMID: 31099325 DOI: 10.1017/s0022215119001014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To investigate whether oxytocin can prevent ototoxicity related to acoustic trauma. METHODS Twenty-eight rats were divided into four groups: noise (group 1), control (group 2), noise plus oxytocin (group 3), and oxytocin (group 4). Intratympanic oxytocin was administered on days 1, 2, 4, 6, 8 and 10 in groups 3 and 4. Groups 1 and 3 were exposed to acoustic trauma. Distortion product otoacoustic emission and auditory brainstem response testing were performed in all groups. RESULTS In group 1, auditory brainstem response thresholds increased significantly after acoustic trauma. In group 3, auditory brainstem response thresholds increased significantly on day 1 after acoustic trauma, but there were no significant differences between thresholds at baseline and on the 7th and 21st days. In group 1, significant differences were observed between distortion product otoacoustic emission signal-to-noise ratios measured before and on days 1, 7 and 21 after acoustic trauma. In group 3, no significant differences were observed between the distortion product otoacoustic emission signal-to-noise ratios measured before and on days 7 and 21 after acoustic trauma. CONCLUSION Oxytocin had a therapeutic effect on rats exposed to acoustic trauma in this experiment.
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Reply to the letter to the editor concerning: “The therapeutic effect of thymoquinone on acoustic trauma-induced hearing loss in rats”. Eur Arch Otorhinolaryngol 2017; 274:3543-3544. [DOI: 10.1007/s00405-017-4499-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 01/31/2017] [Indexed: 10/20/2022]
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Yenigun A, Dogan R, Ozturan O. Letter to the editor on “The therapeutic effect of thymoquinone on acoustic trauma-induced hearing loss in rats”. Eur Arch Otorhinolaryngol 2017; 274:3541. [DOI: 10.1007/s00405-017-4495-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 02/03/2017] [Indexed: 11/28/2022]
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Noack V, Pak K, Jalota R, Kurabi A, Ryan AF. An Antioxidant Screen Identifies Candidates for Protection of Cochlear Hair Cells from Gentamicin Toxicity. Front Cell Neurosci 2017; 11:242. [PMID: 28867994 PMCID: PMC5563352 DOI: 10.3389/fncel.2017.00242] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 07/31/2017] [Indexed: 12/24/2022] Open
Abstract
Reactive oxygen species are important elements in ototoxic damage to hair cells (HCs), appearing early in the damage process. Higher levels of natural antioxidants are positively correlated with resistance to ototoxins and many studies have shown that exogenous antioxidants can protect HCs from damage. While a very wide variety of antioxidants with different characteristics and intracellular targets exist, most ototoxicity studies have focused upon one or a few well-characterized compounds. Relatively little research has attempted to determine the comparative efficacy of large variety of different antioxidants. This has been in part due to the lack of translation between cell culture and in vivo measures of efficacy. To circumvent this limitation, we used an in vitro assay based on micro-explants from the basal and middle turns of the neonatal mouse organ of Corti to screen a commercial redox library of diverse antioxidant compounds for their ability to protect mammalian HCs from a high dose of the ototoxic antibiotic gentamicin. The library included several antioxidants that have previously been studied as potential treatments for HC damage, as well as many antioxidants that have never been applied to ototoxicity. The micro-explants were treated with 200 μM gentamicin alone, gentamicin plus one of three dosages of a redox compound, the highest dosage of compound alone, or were untreated. HC counts were determined before the gentamicin insult and at 1, 2, and 3 days afterward to evaluate the HC survival. From a total of 81 antioxidant compounds, 13 exhibited significant protection of HCs. These included members of a variety of antioxidant classes with several novel antioxidants, not previously tested on HCs, appearing to alleviate the damaging gentamicin effect. Some compounds previously shown to be protective of HCs were correspondingly protective in this in vitro screen, while others were not. Finally, one of the three pro-oxidant compounds included in the library as well as six antioxidants exhibited evidence of toxicity in the absence of gentamicin. The results demonstrate the wide variability in the ability of antioxidants to protect HCs from high-dose gentamicin damage, and identify promising candidate leads for further study as potential drug targets. HIGHLIGHTS • A medium-throughput assay based on micro-explants of the organ of Corti was developed to screen mammalian cochlear hair cells for protection from damage by ototoxins.• Eighty one antioxidants and 3 pro-oxidants were evaluated for hair cell protection from high-dose gentamicin.• Thirteen antioxidants were significantly protective, while 6 proved to be damaging.• The use of a common assay permitted an evaluation of the relative capacity of different antioxidants for the protection of hair cells.
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Affiliation(s)
- Volker Noack
- Department of Surgery and Otolaryngology, School of Medicine, University of California, San Diego, La JollaCA, United States
| | - Kwang Pak
- Department of Surgery and Otolaryngology, School of Medicine, University of California, San Diego, La JollaCA, United States.,VA San Diego Healthcare System, San DiegoCA, United States
| | - Rahul Jalota
- Department of Surgery and Otolaryngology, School of Medicine, University of California, San Diego, La JollaCA, United States
| | - Arwa Kurabi
- Department of Surgery and Otolaryngology, School of Medicine, University of California, San Diego, La JollaCA, United States
| | - Allen F Ryan
- Department of Surgery and Otolaryngology, School of Medicine, University of California, San Diego, La JollaCA, United States.,VA San Diego Healthcare System, San DiegoCA, United States
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Soyalıç H, Gevrek F, Karaman S. Curcumin protects against acoustic trauma in the rat cochlea. Int J Pediatr Otorhinolaryngol 2017; 99:100-106. [PMID: 28688549 DOI: 10.1016/j.ijporl.2017.05.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/30/2017] [Accepted: 05/31/2017] [Indexed: 12/28/2022]
Abstract
OBJECTIVES In this study we evaluated the therapeutic utility of curcumin in a rodent model of acoustic trauma using histopathology, immunohistochemical, and distortion product otoacoustic emission (DPOAEs) measurements. METHODS 28 Wistar albino rats were included in the study and randomly assigned to 4 treatment groups. The first group (group 1) served as the control and was exposed to acoustic trauma alone. Group 2 was the curcumin group. Group 3 was the curcumin plus acoustic trauma group. Group 4 was the saline plus acoustic trauma group. Otoacoustic emission measurements were collected at the end of the experiment and all animals were sacrificed. Cochlea were collected and prepared for TUNEL (TdT-mediated deoxyuridinetriphosphate nick end-labelling) staining assay. RESULTS Group 3 maintained baseline DPOAEs values at 3000 Hz, 4000 Hz and 8000 Hz on the 3rd and 5th day of the experiment. DPOAEs results were correlated with the immunohistochemical and histopathological findings in all groups. In comparison to the histopathologic control group, Group 1 exhibited a statistically significant increase in apoptotic indices in the organ of Corti, inner hair cell, and outer hair cell areas (p < 0.05). Relative to the control group, rats in Group 3 showed little increase in inner hair cell and outer hair cell apoptotic indices. CONCLUSIONS Our results support the conclusion that curcumin may protect the cochlear tissues from acoustic trauma in rats. Curcumin injection prior to or after an acoustic trauma reduces cochlear hair cell damage and may protect against hearing loss.
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Affiliation(s)
- Harun Soyalıç
- Ahi Evran University, Training and Research Hospital Department of Otorhinolaryngology, Kırşehir, Turkey.
| | - Fikret Gevrek
- Gaziosmanpaşa University, Department of Histology and Embryology, Tokat, Turkey
| | - Serhat Karaman
- Gaziosmanpaşa University, Department of Emergency Medicine, Tokat, Turkey
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Culhaoglu B, Erbek SS, Erbek S, Hizal E. Protective Effect of Nigella Sativa Oil on Acoustic Trauma Induced Hearing Loss in Rats. Audiol Res 2017; 7:181. [PMID: 28791082 PMCID: PMC5523001 DOI: 10.4081/audiores.2017.181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 06/20/2017] [Accepted: 06/24/2017] [Indexed: 01/04/2023] Open
Abstract
Acoustic trauma is a common reason for hearing loss. Different agents are used to prevent the harmful effect of acoustic trauma on hearing. The aim of this study was to evaluate the potential preventive effect of Nigella sativa (black cumin) oil in acoustic trauma. Our experimental study was conducted with 20 Sprague Downey female rats (mean age, 12 months; mean weight 250 g). All of the procedures were held under general anesthesia. Following otoscopic examinations, baseline-hearing thresholds were obtained using auditory brainstem responses (ABR). To create acoustic trauma, the rats were then exposed to white band noise of 4 kHz with an intensity level of 107 dB in a soundproof testing room. On Day 1 following acoustic trauma, hearing threshold measurements were repeated. The rats were divided into two groups as the study group (n: 10) and the controls (n: 10). 2 mL/kg/day of Nigella sativa oil was given to the rats in the study group orally. On Day 4 following acoustic trauma, ABR measurements were repeated again. There was no difference between the baseline hearing thresholds of the rats before acoustic trauma (P>0.005). After the acoustic trauma, hearing thresholds were increased and there was no significant statistically difference between the hearing thresholds of the study and control groups (P=0.979). At the 4th day following acoustic trauma, hearing thresholds of the rats in control group were found to be higher than those in the study group (P=0.03). Our results suggest that Nigella sativa oil has a protective effect against acoustic trauma in early period. This finding should be supported with additional experimental and clinical studies, especially to determine the optimal dose, duration and frequency of potential Nigella sativa oil therapy.
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Affiliation(s)
- Belde Culhaoglu
- Department of Otorhinolaryngology, Baskent University, Ankara, Turkey
| | - Selim S Erbek
- Department of Otorhinolaryngology, Baskent University, Ankara, Turkey
| | - Seyra Erbek
- Department of Otorhinolaryngology, Baskent University, Ankara, Turkey
| | - Evren Hizal
- Department of Otorhinolaryngology, Baskent University, Ankara, Turkey
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Ogurlu M, Celebi Erdivanli O, Tumkaya L, Ozgur A, Ozergin Coskun Z, Terzi S, Demirci M, Dursun E. The therapeutic effect of thymoquinone on acoustic trauma-induced hearing loss in rats. Eur Arch Otorhinolaryngol 2016; 274:743-749. [PMID: 27766410 DOI: 10.1007/s00405-016-4319-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 09/22/2016] [Indexed: 12/17/2022]
Abstract
Thymoquinone has antioxidant properties. We hypothesized that thymoquinone may prevent or alleviate hearing loss induced by acoustic trauma. We aimed to study thymoquinone's effect on hearing function with distortion-product otoacoustic emissions and auditory brainstem response. Thirty adult Spraque Dawley rats were randomized into four groups following exposure to acoustic trauma for 4 h. Control group (n = 7) did not receive further treatment. Thymoquinone-20 (n = 8) and Thymoquinone-40 (n = 8) received 20 and 40 mg/kg of intraperitoneal thymoquinone, respectively. Corn-oil group (n = 7) received 1 ml of corn oil intraperitoneally. Hearing function of both ears was tested with distortion-product otoacoustic emission and auditory brainstem response before, and shortly after acoustic trauma, and 96 h following acoustic trauma. Post-trauma signal/noise ratios and wave V amplitude/latencies of all groups were significantly low compared with pre-trauma values, which indicate no preventive effect of thymoquinone. Rats in Thymoquinone-20 showed a significantly improved distortion-product otoacoustic emission and auditory brainstem response results at 4000 frequency and above in post-treatment tests (p < 0.05). Improvement in Thymoquinone-40 at the same frequencies was insignificantly inferior to Thymoquinone-20, yet superior to control and corn-oil groups (p < 0.05). We conclude that thymoquinone may not prevent acoustic trauma-induced hearing loss, however, at 20 mg/kg for 96 h, may repair the damage.
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Affiliation(s)
- Mahmut Ogurlu
- Department of Otorhinolaryngology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey
| | - Ozlem Celebi Erdivanli
- Department of Otorhinolaryngology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey. .,İslampaşa mahallesi, Recep Tayyip Erdoğan Üniversitesi Tıp Fakültesi Eğitim ve Araştırma Hastanesi, Kulak Burun Boğaz Anabilim Dalı, 53100, Rize, Türkiye.
| | - Levent Tumkaya
- Department of Histology and Embryology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey
| | - Abdulkadir Ozgur
- Department of Otorhinolaryngology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey
| | - Zerrin Ozergin Coskun
- Department of Otorhinolaryngology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey
| | - Suat Terzi
- Department of Otorhinolaryngology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey
| | - Munir Demirci
- Department of Otorhinolaryngology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey
| | - Engin Dursun
- Department of Otorhinolaryngology, Recep Tayyip Erdogan University Medical Faculty, Rize, Turkey
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Sereflican M, Yurttas V, Ozyalvacli G, Terzi EH, Turkoglu SA, Yildiz S, Ilgaz Y, Seyhan S, Oral M, Dagli M. The histopathological and electrophysiological effects of thymoquinone and methylprednisolone in a rabbit traumatic facial nerve paralysis model. Am J Otolaryngol 2016; 37:407-15. [PMID: 27311344 DOI: 10.1016/j.amjoto.2016.05.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 05/12/2016] [Accepted: 05/16/2016] [Indexed: 01/26/2023]
Abstract
OBJECTIVE We aimed to determine the effects of methylprednisolone and thymoquinone on nerve healing in a traumatic facial nerve paralysis animal model. SUBJECTS AND METHODS Twenty-four rabbits were randomly divided into 4 groups: group I: control group received no medication and no trauma; group II: sham group received no medication after facial nerve trauma group III: 5mg/kg/day thymoquinone administered; group IV: 1mg/kg/day methylprednisolone administered. An initial electrophysiological assessment was performed in all the animals. The buccal branch of the facial nerve was then clipped to form a traumatic facial paralysis model. The drugs were administered for two weeks once a day. At the end of the second month, the electrophysiological assessments were performed and the distal part of the traumatic facial nerve were dissected and examined under light microscopy. RESULTS Best nerve regeneration was observed in the control and the thymoquinone groups, respectively, whereas the weakest regeneration was determined in the sham group. Thymoquinone and methylprednisolone significantly increased nerve recovery, as measured by histopathological scores and electrophysiological assessment. In the thymoquinone group, due to postoperative amplitude, axon diameter and thickness of myelin sheath values were significantly further increased nerve regeneration compared to that of the methylprednisolone group and these values were close to those of the values of the control group. CONCLUSION Thymoquinone was slightly better than methylprednisolone for functional nerve recovery. The neuroprotective effect of thymoquinone was attributed to its antioxidant and anti-inflammatory effects. Thymoquinone can have a new treatment option to ameliorate the nerve injury.
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Affiliation(s)
- Murat Sereflican
- Department of Otolaryngology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey.
| | - Veysel Yurttas
- Department of Otolaryngology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
| | - Gulzade Ozyalvacli
- Department of Pathology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
| | - Elcin Hakan Terzi
- Department of Medical Histology and Embryology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
| | - Sule Aydin Turkoglu
- Department of Neurology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
| | - Serpil Yildiz
- Department of Neurology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
| | - Yasin Ilgaz
- Department of Medical Histology and Embryology, Gulhane Military Medical Academy, Ankara, Turkey
| | - Sinan Seyhan
- Department of Otolaryngology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
| | - Mesut Oral
- Department of Otolaryngology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
| | - Muharrem Dagli
- Department of Otolaryngology, Abant Izzet Baysal University, Faculty of Medicine, Bolu, Turkey
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