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https://www.readbyqxmd.com/read/28087419/cochlear-synaptopathy-in-acquired-sensorineural-hearing-loss-manifestations-and-mechanisms
#1
REVIEW
M Charles Liberman, Sharon G Kujawa
Common causes of hearing loss in humans - exposure to loud noise or ototoxic drugs and aging - often damage sensory hair cells, reflected as elevated thresholds on the clinical audiogram. Recent studies in animal models suggest, however, that well before this overt hearing loss can be seen, a more insidious, but likely more common, process is taking place that permanently interrupts synaptic communication between sensory inner hair cells and subsets of cochlear nerve fibers. The silencing of affected neurons alters auditory information processing, whether accompanied by threshold elevations or not, and is a likely contributor to a variety of perceptual abnormalities, including speech-in-noise difficulties, tinnitus and hyperacusis...
January 10, 2017: Hearing Research
https://www.readbyqxmd.com/read/28077265/a-smart-aminoglycoside-hydrogel-with-tunable-gel-degradation-on-demand-drug-release-and-high-antibacterial-activity
#2
Jingjing Hu, Yanchun Quan, Yuping Lai, Zhao Zheng, Zhiqi Hu, Xinyu Wang, Tianjiao Dai, Qiang Zhang, Yiyun Cheng
Aminoglycosides are a family of critically important antibiotics for the treatment of serious infections including multidrug-resistant pathogens. However, clinical use of aminoglycoside antibiotics is compromised by bacterial biofilm formation at subinhibitory concentrations or adverse side effects such as ototoxicity and nephrotoxicity at high antibiotic doses. Preparation of aminoglycoside formulation that allows on-demand drug delivery is a solution to this sticky issue. Here, we designed a new type of aminoglycoside hydrogels by cross-linking oxidized polysaccharides such as dextran, carboxymethyl cellulose, alginate, and chondroitin using aminoglycosides as cross-linkers...
January 7, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28072811/evaluation-of-the-ototoxicity-potential-of-once-daily-single-entity-hydrocodone-in-patients-with-chronic-pain-results-of-two-phase-3-clinical-studies
#3
Kathleen Campbell, J Walter Kutz, Angela Shoup, Warren Wen, Shau Yu Lynch, Ellie He, Steven R Ripa
BACKGROUND: Use/misuse of the opioid combination hydrocodone-acetaminophen has been associated with permanent hearing loss. Although reports have been rare, this potential effect can have significant detrimental effect on patients' overall quality of life. To date, the ototoxic effect of hydrocodone alone has not been systematically investigated. OBJECTIVE: In this report, we aimed to evaluate the potential ototoxicity of a novel, single-entity, once-daily, extended-release hydrocodone tablet (Hysingla® ER; HYD)...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28063006/therapeutic-value-of-nerve-growth-factor-in-promoting-neural-stem-cell-survival-and-differentiation-and-protecting-against-neuronal-hearing-loss
#4
Zhao Han, Cong-Pin Wang, Ning Cong, Yu-Yan Gu, Rui Ma, Fang-Lu Chi
Nerve growth factor (NGF) is a neurotrophic factor that modulates survival and differentiation of neural stem cells (NSCs). We investigated the function of NGF in promoting growth and neuronal differentiation of NSCs isolated from mouse cochlear tissue, as well as its protective properties against gentamicin (GMC) ototoxicity. NSCs were isolated from the cochlea of mice and cultured in vitro. Effect of NGF on survival, neurosphere formation, and differentiation of the NSCs, as well as neurite outgrowth and neural excitability in the subsequent in vitro neuronal network, was examined...
January 7, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28062185/allicin-protects-auditory-hair-cells-and-spiral-ganglion-neurons-from-cisplatin-induced-apoptosis
#5
Xianmin Wu, Xiaofei Li, Yongdong Song, He Li, Xiaohui Bai, Wenwen Liu, Yuechen Han, Lei Xu, Jianfeng Li, Daogong Zhang, Haibo Wang, Zhaomin Fan
Cisplatin is a broad-spectrum anticancer drug that is commonly used in the clinic. Ototoxicity is one of the major side effects of this drug, which caused irreversible sensorineural hearing loss. Allicin, the main biologically active compound derived from garlic, has been shown to exert various anti-apoptotic and anti-oxidative activities in vitro and in vivo studies. We took advantage of C57 mice intraperitoneally injected with cisplatin alone or with cisplatin and allicin combined, to investigate whether allicin plays a protective role in vivo against cisplatin ototoxicity...
January 3, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28045920/alterations-in-evoked-otoacoustic-emissions-by-the-use-of-meglumine-antimoniate-in-american-tegumentary-leishmaniasis-patients
#6
Débora Cristina de Oliveira Bezerra, Renata Oliveira de Barcelos, Ellen Carvalho de Castro, Claudia Cristina Jardim Duarte, Raquel de Vasconcellos Carvalhaes Oliveira, Tania Salgado de Sousa Torraca, Maria Helena de Araújo-Melo, Frederico Pereira Bom Braga, Benivaldo Ramos Ferreira Terceiro, Lúcia Regina do Nascimento Brahim Paes, Armando de Oliveira Schubach, Cláudia Maria Valete-Rosalino
INTRODUCTION: Tegumentary Leishmaniasis (TL) is a neglected, non-contagious, infectious disease, caused by different protozoa species of the Leishmania genus that affects skin and mucous membranes. Meglumine Antimoniate (MA), the first drug of choice for TL treatment in Brazil, has already been associated with cochlear toxicity, which is defined as damages of the cochlea caused by exposure to chemical substances, resulting in reversible or irreversible hearing loss. Auditory monitoring for cochlear toxicity aims at the early detection of auditory disorders, enabling, when possible, hearing to be preserved or an early auditory rehabilitation...
2017: PloS One
https://www.readbyqxmd.com/read/28043290/-research-progress-on-ototoxicity-and-hearing-loss-effects-of-organic-solvents
#7
M Zhang, P Xu, Q Gu
No abstract text is available yet for this article.
November 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28042086/curcumin-a-potentially-powerful-tool-to-reverse-cisplatin-induced-toxicity
#8
REVIEW
Ramin Rezaee, Amir Abbas Momtazi, Alireza Monemi, Amirhossein Sahebkar
Curcumin is a naturally occurring polyphenol isolated from Curcuma longa that has gained considerable interest over the last decades due to its beneficial effects for human health. Moreover, the usage of cisplatin, a platinum-based chemotherapeutic, is associated with several adverse effects affecting the quality of life of the patients. Also, cisplatin therapy is jeopardized by a great challenge of resistance which reduces the efficacy of this drug. In order to conquer these dark sides of cisplatin therapy, curcumin has been widely used to fight against cisplatin-resistant cancer cells and decrease its unwanted side effects (e...
December 29, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28039263/variants-in-wfs1-and-other-mendelian-deafness-genes-are-associated-with-cisplatin-associated-ototoxicity
#9
Heather E Wheeler, Eric R Gamazon, Robert Frisina, Carlos Perez-Cervantes, Omar El Charif, Brandon Mapes, Sophie D Fossa, Darren Feldman, Robert Hamilton, David J Vaughn, Clair Beard, Chunkit Fung, Christian Kollmannsberger, Jeri Kim, Taisei Mushiroda, Michiaki Kubo, Shirin Ardeshir-Rouhani-Fard, Lawrence H Einhorn, Nancy Cox, M Eileen Dolan, Lois Travis
PURPOSE: Cisplatin is one of the most commonly used chemotherapy drugs worldwide and one of the most ototoxic. We sought to identify genetic variants that modulate cisplatin-associated ototoxicity (CAO). EXPERIMENTAL DESIGN: We performed a genome-wide association study (GWAS) of CAO using quantitative audiometry (4-12 kHz) in 511 testicular cancer survivors of European genetic ancestry. We performed polygenic modeling and functional analyses using a variety of publicly available databases...
December 30, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28026149/arctigenin-protects-against-neuronal-hearing-loss-by-promoting-neural-stem-cell-survival-and-differentiation
#10
Xinghua Huang, Mo Chen, Yan Ding, Qin Wang
Neuronal hearing loss has become a prevalent health problem. This study focused on the function of arctigenin (ARC) in promoting survival and neuronal differentiation of mouse cochlear neural stem cells (NSCs), and its protection against gentamicin (GMC) induced neuronal hearing loss. Mouse cochlea was utilized to isolate NSCs, which were subsequently cultured in vitro. The effects of ARC on NSC survival, neurosphere formation, differentiation of NSCs, neurite outgrowth and neural excitability in neuronal network in vitro were examined...
December 27, 2016: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/28013217/strain-and-sex-differences-in-the-vestibular-and-systemic-toxicity-of-3-3-iminodipropionitrile-in-mice
#11
Pere Boadas-Vaello, Lara Sedó-Cabezón, Enrique Verdú, Jordi Llorens
The nitrile 3,3'-iminodipropionitrile (IDPN) causes a loss of hair cells in the vestibular epithelium of the inner ear in several species of both mammals and non-mammals. It is of interest as a model compound in ototoxicity and vestibular regeneration research, but its effects on the mouse, including the potential relevance of strain and sex differences for susceptibility, have not yet been thoroughly characterized. In this study, we compared the vestibular toxicity of IDPN in dose-response studies (0, 8, 12, 16 and 24 mmol/kg IDPN p...
December 24, 2016: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28012535/peanut-sprout-extract-attenuates-cisplatin-induced-ototoxicity-by-induction-of-the-akt-nrf2-mediated-redox-pathway
#12
Cha Kyung Youn, Eu-Ri Jo, Ju-Hwan Sim, Sung Il Cho
OBJECTIVE: Cisplatin is commonly used to treat solid tumors. However, permanent hearing loss is a major side effect of cisplatin chemotherapy and often results in dose reduction of the cisplatin chemotherapy. Peanut sprouts show cytoprotective properties owing to their antioxidant activities. This study was designed to investigate the effect of peanut sprout extract (PSE) on cisplatin-induced ototoxicity in an auditory cell line, HEI-OC1 cells. METHODS: Cells were exposed to cisplatin for 24 h, with or without pre-treatment with PSE, cell viability was examined using the MTT assay...
January 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28012509/changes-in-the-inner-ear-structures-in-cystic-fibrosis-patients
#13
Henrique F Pauna, Rafael C Monsanto, Natsuko Kurata, Michael M Paparella, Sebahattin Cureoglu
OBJECTIVE: Although prolonged use of antibiotics is very common in cystic fibrosis (CF) patients, no studies have assessed the changes in both cochlear and peripheral vestibular systems in this population. METHODS: We used human temporal bones to analyze the density of vestibular dark, transitional, and hair cells in specimens from CF patients who were exposed to several types of antibiotics, as compared with specimens from an age-matched control group with no history of ear disease or antibiotic use...
January 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28007648/minocycline-attenuates-noise-induced-hearing-loss-in-rats
#14
Jing Zhang, Yong-Li Song, Ke-Yong Tian, Jian-Hua Qiu
Noise-induced hearing loss (NIHL) is a serious health concern and prevention of hair cell death or therapeutic intervention at the early stage of NIHL is critical to preserve hearing. Minocycline is a semi-synthetic derivative of tetracycline and has been shown to have otoprotective effects in ototoxic drug-induced hearing impairment, however, whether minocycline can protect against NIHL has not been investigated. The present study demonstrated elevated ABR (auditory brainstem response) thresholds and outer hair cell loss following traumatic noise exposure, which was mitigated by intraperitoneal administration of minocycline (45mg/kg/d) for 5 consecutive days...
December 19, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/28002638/drug-induced-ototoxicity-mechanisms-pharmacogenetics-and-protective-strategies
#15
REVIEW
Claudia Lanvers-Kaminsky, Antoinette G Am Zehnhoff-Dinnesen, Ross Parfitt, Giuliano Ciarimboli
Drug ototoxicity limits quality of life of patients after treatment, having serious consequences especially for psychosocial development of children. While the ototoxicity of many drugs resolves after treatment discontinuation, the use of platinum derivatives and aminoglycosides is associated with permanent hearing loss. In this review, we have listed ototoxic drugs and the mechanisms by which they damage the ears. Moreover, possible protective strategies and important methods for early detection of ototoxic effects are discussed...
December 21, 2016: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27992270/role-of-high-dose-chemotherapy-with-autologous-stem-cell-rescue-in-men-with-previously-treated-germ-cell-tumors
#16
Lance C Pagliaro
The Oncology Grand Rounds series is designed to place original reports published in the Journal into clinical context. A case presentation is followed by a description of diagnostic and management challenges, a review of the relevant literature, and a summary of the authors' suggested management approaches. The goal of this series is to help readers better understand how to apply the results of key studies, including those published in Journal of Clinical Oncology, to patients seen in their own clinical practice...
December 19, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27989950/plastic-changes-along-auditory-pathway-during-salicylate-induced-ototoxicity-hyperactivity-and-cf-shifts
#17
Chen Jiang, Bin Luo, Senthilvelan Manohar, Guang-Di Chen, Richard Salvi
High dose of salicylate, the active ingredient in aspirin, has long been known to induce transient hearing loss, tinnitus and hyperacusis making it a powerful experimental tool. These salicylate-induced perceptual disturbances are associated with a massive reduction in the neural output of the cochlea. Paradoxically, the diminished neural output of the cochlea is accompanied by a dramatic increase in sound-evoked activity in the auditory cortex (AC) and several other parts of the central nervous system. Exactly where the increase in neural activity begins and builds up along the central auditory pathway are not fully understood...
October 27, 2016: Hearing Research
https://www.readbyqxmd.com/read/27966334/study-of-mouse-induced-pluripotent-stem-cell-transplantation-intowistar-albino-rat-cochleae-after-hair-cell-damage
#18
Mustafa Kürşat Gökcan, Selçuk Mülazimoğlu, Emre Ocak, Pınar Can, Murat Çalışkan, Ömer Beşaltı, Serpil Dizbay Sak, Gülşah Kaygusuz
BACKGROUND/AIM: As the regeneration capacity of hair cells is limited, inner ear stem cell therapies hold promise. Effects of mouse induced pluripotent stem cells (IPSCs) on Wistar albino rats (WARs) with hearing impairment were investigated. MATERIALS AND METHODS: Thirty-five adult WARs with normal hearing were divided into 4 groups. Excluding the study group (n = 15), the other three groups served as control groups for ototoxicity and IPSC injection models. IPSC injections were performed via cochleostomy after a retroauricular approach...
November 17, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/27942103/gentamicin-mediated-ototoxicity-and-nephrotoxicity-a-clinical-trial-study
#19
Parviz Saleh, Shamsi Abbasalizadeh, Saman Rezaeian, Mohammad Naghavi-Behzad, Reza Piri, Hojjat Hossein Pourfeizi
BACKGROUND: Aminoglycosides and mainly gentamicin are the most important antimicrobial agents. Two different methods of administration exist: Single and multiple doses. There has always been a controversy about the less harmful administration method, to minimize adverse effects of gentamicin - deafness and renal insufficiency. In this study, it was aimed to compare two different methods of administration to figure out the least harmful treatment method. MATERIALS AND METHODS: In a clinical study, eighty patients aged 12-55 years who were admitted with sepsis syndrome were included in the study; they were divided into two groups: The first group received single-dose treatment (5 mg/kg) whereas the second group was treated with multiple doses (1...
November 2016: Nigerian Medical Journal: Journal of the Nigeria Medical Association
https://www.readbyqxmd.com/read/27941700/the-adverse-effects-of-heavy-metals-with-and-without-noise-exposure-on-the-human-peripheral-and-central-auditory-system-a-literature-review
#20
REVIEW
Marie-Josée Castellanos, Adrian Fuente
Exposure to some chemicals in the workplace can lead to occupational chemical-induced hearing loss. Attention has mainly focused on the adverse auditory effects of solvents. However, other chemicals such as heavy metals have been also identified as ototoxic agents. The aim of this work was to review the current scientific knowledge about the adverse auditory effects of heavy metal exposure with and without co-exposure to noise in humans. PubMed and Medline were accessed to find suitable articles. A total of 49 articles met the inclusion criteria...
December 9, 2016: International Journal of Environmental Research and Public Health
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