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Hearing ototoxicity

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https://www.readbyqxmd.com/read/28646272/rhesus-cochlear-and-vestibular-functions-are-preserved-after-inner-ear-injection-of-saline-volume-sufficient-for-gene-therapy-delivery
#1
Chenkai Dai, Mohamed Lehar, Daniel Q Sun, Lani Swarthout Rvt, John P Carey, Tim MacLachlan, Doug Brough, Hinrich Staecker, Alexandra M Della Santina, Timothy E Hullar, Charles C Della Santina
Sensorineural losses of hearing and vestibular sensation due to hair cell dysfunction are among the most common disabilities. Recent preclinical research demonstrates that treatment of the inner ear with a variety of compounds, including gene therapy agents, may elicit regeneration and/or repair of hair cells in animals exposed to ototoxic medications or other insults to the inner ear. Delivery of gene therapy may also offer a means for treatment of hereditary hearing loss. However, injection of a fluid volume sufficient to deliver an adequate dose of a pharmacologic agent could, in theory, cause inner ear trauma that compromises functional outcome...
June 23, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28636736/the-protective-effect-of-intratympanic-dexamethasone-on-streptomycin-ototoxicity-in-rats
#2
Aylin Gül, Engin Şengül, Beyhan Yılmaz, Fazıl Emre Özkurt, Mehmet Akdağ, Ayşenur Keleş, İsmail Topçu
The purpose of this experimental study was to investigate the protective role of intratympanically administered dexamethasone on the inner ears of rats that were exposed to streptomycin ototoxicity. Twenty-four adult Wistar albino rats were separated into 4 groups: Group 1 (only streptomycin), Group 2 (only intratympanic dexamethasone), Group 3 (streptomycin and intratympanic dexamethasone), and Group 4 (streptomycin and intratympanic saline). All rats were evaluated with distortion product otoacoustic emissions (DPOAE) tests before the start of treatment and on the day it ended...
June 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28633708/once-daily-dosing-of-amikacin-for-treatment-of-mycobacterium-abscessus-lung-disease
#3
H Lee, Y M Sohn, J Y Ko, S-Y Lee, B W Jhun, H Y Park, K Jeon, D H Kim, S-Y Kim, J E Choi, I J Moon, S J Shin, H J Park, W-J Koh
SETTING: Tertiary referral centre, Samsung Medical Center, South Korea. OBJECTIVE: To evaluate the pharmacokinetic parameters and toxicities of once-daily amikacin (AMK) dosing for lung disease due to Mycobacterium abscessus. DESIGN: A retrospective review of 48 patients with M. abscessus lung disease who received once-daily AMK for 4 weeks between January 2012 and June 2015. RESULTS: With a starting dose of 15 mg/kg/day and adjustment of AMK dose according to the peak serum level (Cmax), the Cmax target of 55-65 μg/ml was achieved in 31...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28625810/evaluating-the-ototoxicity-of-a-anti-mrsa-peptide-kr-12-a2
#4
Chung Man Sung, Hong Chan Kim, Yong Beom Cho, Song Yub Shin, Chul Ho Jang
INTRODUCTION: Methicillin-Resistant Staphylococcus aureus (MRSA) is an emerging problem for the treatment of chronic suppurative otitis media, and also for pediatric tympanostomy tube otorrhea. To date, there are no effective topical antibiotic drugs to treat MRSA otorrhea. OBJECTIVE: In this study, we evaluated the ototoxicity of topical KR-12-a2 solution on the cochlea when it applied topically in the middle ear of guinea pigs. METHODS: The antimicrobial activity of KR-12-a2 against MRSA strains was examined by using the inhibition zone test...
May 31, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28599263/environmental-exposures-to-lead-mercury-and-cadmium-and-hearing-loss-in-adults-and-adolescents-knhanes-2010-2012
#5
(no author information available yet)
BACKGROUND: The prevalence of hearing loss increases rapidly with aging. Hearing loss is common in all age groups, even in young adults and adolescents. A growing body of evidence has suggested that heavy metals have ototoxic effects, yet few epidemiological studies have investigated the association between heavy metals and hearing loss in a general population that includes adults and adolescents. OBJECTIVES: We examined the association between environmental exposures to lead, mercury, and cadmium and the risk of hearing loss in adults and adolescents while controlling for potential confounding factors, including noise exposures and clinical factors...
June 8, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28590156/hearing-loss-after-platinum-treatment-is-irreversible-in-noncranial-irradiated-childhood-cancer-survivors
#6
Eva Clemens, Andrica Ch de Vries, Antoinette Am Zehnhoff-Dinnesen, Wim Je Tissing, Jacqueline J Loonen, Saskia Fm Pluijm, Eline van Dulmen-den Broeder, Dorine Bresters, Birgitta Versluys, Leontien Cm Kremer, Helena J van der Pal, Sebastian Jccm Neggers, Martine van Grotel, Marry M van den Heuvel-Eibrink
Cisplatin and carboplatin are effective antineoplastic agents. They are also considered to be potentially highly ototoxic. To date, no long-term follow-up data from well-documented cohorts with substantial numbers of childhood cancer survivors (CCS) with platinum-related hearing loss are available. Therefore, in this study, we studied the reversibility of ototoxicity from discontinuation of treatment onwards in a national cohort of platinum-treated survivors with hearing loss at the end of cancer treatment...
June 7, 2017: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/28583486/ototoxicity-associated-with-topical-administration-of-diclofenac-sodium-as-an-otic-drop-an-experimental-animal-study
#7
Engin Acioglu, Ozgur Yigit, Firat Onur, Ahmet Atas, Ela Araz Server, Eyup Kara
OBJECTIVES: The aim of the study is to evaluate the ototoxicity of topical diclofenac sodium in comparison to positive and negative controls prior to the investigation of analgesic and anti-inflammatory efficacy of the agent in otic administration. METHODS: Twenty four ears of 12 guinea pigs were included in the study. Wide myringotomy was performed on all tympanic membranes under general anesthesia and auditory brainstem responses (ABR) were evaluated. The subjects were separated into four groups, two groups received diclofenac sodium at low and high doses, positive controls received gentamicin and negative controls received isotonic sodium chloride topically for 14 days and ABRs were reevaluated...
July 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28572758/activation-of-chk1-in-supporting-cells-indirectly-promotes-hair-cell-survival
#8
Azadeh Jadali, Yu-Lan M Ying, Kelvin Y Kwan
The sensory hair cells of the inner ear are exquisitely sensitive to ototoxic insults. Loss of hair cells after exposure to ototoxic agents causes hearing loss. Chemotherapeutic agents such as cisplatin causes hair cell loss. Cisplatin forms DNA mono-adducts as well as intra- and inter-strand DNA crosslinks. DNA cisplatin adducts are repaired through the DNA damage response. The decision between cell survival and cell death following DNA damage rests on factors that are involved in determining damage tolerance, cell survival and apoptosis...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28541783/cyclosporine-causes-no-hearing-defect-in-paediatric-patients-with-nephrotic-syndrome
#9
Belde Kasap-Demir, Derya Özmen, Günay Kırkım, Ersoy Doğan, Alper Soylu, Bülent Şerbetçioğlu, Salih Kavukçu
OBJECTIVE: We aimed to evaluate the ototoxicity of cyclosporine A (CsA) in children with nephrotic syndrome (NS). DESIGN: Data of paediatric patients with NS followed in paediatric nephrology department were evaluated retrospectively, and hearing functions were evaluated by pure tone audiometry (PTA) and transient evoked otoacoustic emissions (TEOAEs). Age, gender, type of NS, duration and cumulative doses of immunosuppressives were noted. STUDY SAMPLE: The patients who had received CsA (n: 16) and immunosuppressives other than CsA (n: 13) for at least 6 months formed two patient groups and healthy cases formed a control group (n: 20)...
May 25, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28537102/cisplatin-induced-metabolome-changes-in-serum-an-experimental-approach-to-identify-markers-for-ototoxicity
#10
Pernilla Videhult Pierre, Jakob Haglöf, Birgitta Linder, Mikael K R Engskog, Torbjörn Arvidsson, Curt Pettersson, Anette Fransson, Göran Laurell
BACKGROUND: Ototoxicity from treatment with the anticancer drug cisplatin remains a clinical problem. A wide range of intracellular targets of cisplatin has been found in vivo. AIM: To investigate cisplatin-induced change of the serum metabolite profile and its association with ototoxicity. MATERIAL AND METHODS: Guinea pigs (n = 14) were treated with cisplatin (8 mg/kg b.w., i.v.) 30 min after administration of the otoprotector candidate sodium thiosulfate (group STS; n = 7) or sodium chloride (group NaCl; n = 7)...
May 24, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28526588/adam10-and-%C3%AE-secretase-regulate-sensory-regeneration-in-the-avian-vestibular-organs
#11
Mark E Warchol, Jennifer Stone, Matthew Barton, Jeffrey Ku, Rose Veile, Nicolas Daudet, Michael Lovett
The loss of sensory hair cells from the inner ear is a leading cause of hearing and balance disorders. The mammalian ear has a very limited ability to replace lost hair cells, but the inner ears of non-mammalian vertebrates can spontaneously regenerate hair cells after injury. Prior studies have shown that replacement hair cells are derived from epithelial supporting cells and that the differentiation of new hair cells is regulated by the Notch signaling pathway. The present study examined molecular influences on regeneration in the avian utricle, which has a particularly robust regenerative ability...
May 17, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28520533/a-fully-automated-high-throughput-zebrafish-behavioral-ototoxicity-assay
#12
Douglas W Todd, Rohit C Philip, Maki Niihori, Ryan A Ringle, Kelsey R Coyle, Sobia F Zehri, Jordan A Mudery, Ross H Francis, Jeffrey J Rodriguez, Abraham Jacob
Zebrafish animal models lend themselves to behavioral assays that can facilitate rapid screening of ototoxic, otoprotective, and otoregenerative drugs. Structurally similar to human inner ear hair cells, the mechanosensory hair cells on their lateral line allow the zebrafish to sense water flow and orient head-to-current in a behavior called rheotaxis. This rheotaxis behavior deteriorates in a dose-dependent manner with increased exposure to the ototoxin cisplatin, thereby establishing itself as an excellent biomarker for anatomic damage to lateral line hair cells...
May 18, 2017: Zebrafish
https://www.readbyqxmd.com/read/28511189/the-role-of-audiometry-prior-to-high-dose-cisplatin-in-patients-with-head-and-neck-cancer
#13
Miguel Caballero, Paula Mackers, Oscar Reig, Elvira Buxo, Pilar Navarrete, Jose L Blanch, Juan J Grau
OBJECTIVES: To analyze the role of audiometry in considering change to a less ototoxic treatment in head and neck cancer (HNC) patients. METHODS: Consecutive patients prescribed high-dose cisplatin (100 mg/m2) between January 2013 and February 2015 were enrolled. Audiometry was performed at baseline and before cisplatin. Change to a less ototoxic agent or reduced cisplatin dose was considered with audiometric decreases >25 dB. RESULTS: A total of 103 patients were included; the median age of the patients was 59 years (range 18-75)...
May 17, 2017: Oncology
https://www.readbyqxmd.com/read/28487633/cochlear-homocysteine-metabolism-at-the-crossroad-of-nutrition-and-sensorineural-hearing-loss
#14
REVIEW
Teresa Partearroyo, Néstor Vallecillo, María A Pajares, Gregorio Varela-Moreiras, Isabel Varela-Nieto
Hearing loss (HL) is one of the most common causes of disability, affecting 360 million people according to the World Health Organization (WHO). HL is most frequently of sensorineural origin, being caused by the irreversible loss of hair cells and/or spiral ganglion neurons. The etiology of sensorineural HL (SNHL) is multifactorial, with genetic and environmental factors such as noise, ototoxic substances and aging playing a role. The nutritional status is central in aging disability, but the interplay between nutrition and SNHL has only recently gained attention...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28483249/effect-of-gentamicin-and-levels-of-ambient-sound-on-hearing-screening-outcomes-in-the-neonatal-intensive-care-unit-a-pilot-study
#15
Angela C Garinis, Selena Liao, Campbell P Cross, Johnathan Galati, Jessica L Middaugh, Jess C Mace, Anna-Marie Wood, Lindsey McEvoy, Lauren Moneta, Troy Lubianski, Noe Coopersmith, Nicholas Vigo, Christopher Hart, Artur Riddle, Olivia Ettinger, Casey Nold, Heather Durham, Carol MacArthur, Cynthia McEvoy, Peter S Steyger
OBJECTIVE: Hearing loss rates in infants admitted to neonatal intensive care units (NICU) run at 2-15%, compared to 0.3% in full-term births. The etiology of this difference remains poorly understood. We examined whether the level of ambient sound and/or cumulative gentamicin (an aminoglycoside) exposure affect NICU hearing screening results, as either exposure can cause acquired, permanent hearing loss. We hypothesized that higher levels of ambient sound in the NICU, and/or gentamicin dosing, increase the risk of referral on the distortion product otoacoustic emission (DPOAE) assessments and/or automated auditory brainstem response (AABR) screens...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28482715/hearing-loss-among-high-risk-newborns-admitted-to-a-tertiary-neonatal-intensive-care-unit
#16
May Ahmed Khairy, Walaa Alsharany Abuelhamed, Radwa Sayed Ahmed, Hedayet El Sayed El Fouly, Ismail Mohamed Elhawary
PURPOSE: The aim of this work is to identify the most significant risk factors for hearing impairment in high risk neonates hospitalized at our Neonatal Intensive Care Unit (NICU) and to assess the sensitivity of hearing screening tests. METHODS: This study involved 260 neonates admitted to a tertiary NICU; they were classified into 2 groups; 150 preterm and 110 full terms with risk factors for hearing loss. The hearing screening tests performed were transient evoked otoacoustic emissions (TEOAES) and the automated auditory brain stem response (AABR)...
May 8, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28460251/streptococcus-pneumoniae-induced-ototoxicity-in-organ-of-corti-explant-cultures
#17
Michael Perny, Magdalena Solyga, Denis Grandgirard, Marta Roccio, Stephen L Leib, Pascal Senn
Hearing loss remains the most common long-term complication of pneumococcal meningitis (PM) reported in up to 30% of survivors. Streptococcus pneumoniae have been shown to possess different ototoxic properties. Here we present a novel ex vivo experimental setup to examine in detail the pattern of hair cell loss upon exposure to different S. pneumoniae strains, therefore recapitulating pathogen derived aspects of PM-induced hearing loss. Our results show a higher susceptibility towards S. pneumoniae-induced cochlear damage for outer hair cells (OHC) compared to inner hair cells (IHC), which is consistent with in vivo data...
April 25, 2017: Hearing Research
https://www.readbyqxmd.com/read/28450069/circulating-steroids-negatively-correlate-with-tinnitus
#18
Pavel Chrbolka, Zoltán Palúch, Martin Hill, Štefan Alušík
While not a disease entity in itself; symptoms of tinnitus (from Latin tinnio - clink) accompany a number of diseases. Tinnitus prevalence increases with age, deteriorates one's quality of life, and may even result in suicidal behavior. Tinnitus develops in response to a variety of risk factors, otoxic substances, noise exposure, hearing disorders, and psychological alterations. Tinnitus is closely related to mood, depression, and psychological state. In the present study, we focused on alterations of the steroid metabolome and particularly neuroactive, neuroprotective, and immunomodulatory steroids in patients with tinnitus...
April 25, 2017: Steroids
https://www.readbyqxmd.com/read/28448657/association-between-slc16a5-genetic-variation-and-cisplatin-induced-ototoxic-effects-in-adult-patients-with-testicular-cancer
#19
Britt I Drögemöller, Jose G Monzon, Amit P Bhavsar, Adrienne E Borrie, Beth Brooks, Galen E B Wright, Geoffrey Liu, Daniel J Renouf, Christian K Kollmannsberger, Philippe L Bedard, Folefac Aminkeng, Ursula Amstutz, Claudette A Hildebrand, Erandika P Gunaretnam, Carol Critchley, Zhuo Chen, Liam R Brunham, Michael R Hayden, Colin J D Ross, Karen A Gelmon, Bruce C Carleton
Importance: Cisplatin-induced ototoxic effects are an important complication that affects testicular cancer survivors as a consequence of treatment. The identification of genetic variants associated with this adverse drug reaction will further our mechanistic understanding of its development and potentially lead to strategies to prevent ototoxic effects. Objective: To identify the genetic variants associated with cisplatin-induced ototoxic effects in adult testicular cancer patients...
April 27, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28446866/the-contribution-of-immune-infiltrates-to-ototoxicity-and-cochlear-hair-cell-loss
#20
REVIEW
Megan B Wood, Jian Zuo
Cells of the immune system have been shown to infiltrate the cochlea after acoustic trauma or ototoxic drug treatment; however, the contribution of the immune system to hair cell loss in the inner ear is incompletely understood. Most studies have concentrated on the immediate innate response to hair cell damage using CD45 as a broad marker for all immune cells. More recent studies have used RNA sequencing, GeneChip arrays and quantitative PCR to analyze gene expression in the entire cochlea after auditory trauma, leading to a better understanding of the chemokines and cytokines that attract immune cells to the cochlea...
2017: Frontiers in Cellular Neuroscience
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