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Ototoxicity

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https://www.readbyqxmd.com/read/29049998/endoplasmic-reticulum-stress-is-involved-in-cochlear-cell-apoptosis-in-a-cisplatin-induced-ototoxicity-rat-model
#1
Shimin Zong, Tianyi Liu, Fangmin Wan, Pei Chen, Pan Luo, Hongjun Xiao
Endoplasmic reticulum (ER) stress arises when excessive improperly folded proteins accumulate in the ER lumen. When ER stress occurs, the unfolded protein response (UPR) is subsequently activated to restore ER proteostasis. However, severe ER stress leads to apoptosis. Recent studies have suggested that cisplatin cytotoxicity may be related to ER stress. The purpose of this study was to determine whether ER stress participates in cochlear cell apoptosis in a cisplatin-induced ototoxicity rat model and to also determine the possible relationship between ER stress and hearing loss...
October 20, 2017: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/29049311/a-kinase-inhibitor-library-screen-identifies-novel-enzymes-involved-in-ototoxic-damage-to-the-murine-organ-of-corti
#2
Matthew Ryals, Kwang Pak, Rahul Jalota, Arwa Kurabi, Allen F Ryan
Ototoxicity is a significant side effect of a number of drugs, including the aminoglycoside antibiotics and platinum-based chemotherapeutic agents that are used to treat life-threatening illnesses. Although much progress has been made, the mechanisms that lead to ototoxic loss of inner ear sensory hair cells (HCs) remains incompletely understood. Given the critical role of protein phosphorylation in intracellular processes, including both damage and survival signaling, we screened a library of kinase inhibitors targeting members of all the major families in the kinome...
2017: PloS One
https://www.readbyqxmd.com/read/29045502/long-term-toxicity-of-cisplatin-in-germ-cell-tumor-survivors
#3
M Chovanec, M Abu Zaid, N Hanna, N El-Kouri, L H Einhorn, C Albany
Context: Testicular germ cell tumors (GCT) are highly curable. A multidisciplinary approach, including cisplatin-based chemotherapy has resulted in cure in the majority of patients with GCT. Thus, the life expectancy of survivors will extend to many decades post diagnosis. Late treatment toxicities associated with cisplatin-based chemotherapy may impact their future health. Objective: To systematically evaluate evidence regarding the long-term toxicity of cisplatin in GCT survivors...
July 14, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29038666/study-of-methylene-blue-ototoxicity-in-the-guinea-pig
#4
Sarah Belhassen, Musaed Alzahrani, Marc-Elie Nader, Louis Gaboury, Issam Saliba
BACKGROUND: Methylene blue is widely used in the medical field, especially as a blue dye for staining. It is also used as a photosensitizing agent in antimicrobial photodynamic therapy, which once photoactivated is effective for the eradication of several multi-resistant bacteria. The objective of this study was to investigate the ototoxic potential of methylene blue and precise its use in otology. METHODS: It was a prospective animal study performed on guinea pigs in our tertiary medical center...
November 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29033791/protein-synthesis-inhibition-and-activation-of-the-c-jun-n-terminal-kinase-are-potential-contributors-to-cisplatin-ototoxicity
#5
Brian D Nicholas, Shimon Francis, Elizabeth L Wagner, Sibo Zhang, Jung-Bum Shin
Cisplatin has been regarded as an effective and versatile chemotherapeutic agent for nearly 40 years. Though the associated dose-dependent ototoxicity is known, the cellular mechanisms by which cochleovestibular hair cell death occur are not well understood. We have previously shown that aminoglycoside ototoxicity is mediated in part by cytosolic protein synthesis inhibition. Despite a lack of molecular similarity, aminoglycosides were shown to elicit similar stress pathways to cisplatin. We therefore reasoned that there may be some role of protein synthesis inhibition in cisplatin ototoxicity...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29032664/the-protective-effect-of-egb-761-against-3-nitropropionic-acid-induced-hearing-loss-the-role-of-sirtuin-1
#6
Mun Young Chang, Jihye Rhee, Shin Hye Kim, Young Ho Kim
Objectives: Local administration of 3-nitropropionic acid (3-NP) to the inner ear induces sensorineural hearing loss. Several studies have shown the otoprotective effects of ginkgo biloba extract EGb 761. Moreover, EGb 761 has been reported to activate Sirtuin 1 (SIRT1). The present study was designed to investigate whether EGb 761 prevents 3-NPinduced sensorineural hearing loss and determine its effects on the expression of SIRT1. Methods: Sprague Dawley rats were divided into four experimental groups: control group receiving vehicle of 3-NP, EGb group receiving EGb 761, 3-NP group receiving 3-NP, and EGb+3-NP group receiving EGb 761 and 3-NP...
October 17, 2017: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/28979071/risk-versus-benefit-who-assesses-this-in-the-management-of-patients-on-ototoxic-drugs
#7
REVIEW
Katijah Khoza-Shangase
The current paper is an attempt at highlighting important strategic indicators, as well as important variables, that the audiology community needs to consider in order to play a more central role in pharmaco-vigilance as part of pharmaco-audiology. Pharmaco-vigilance is an important aspect of pharmacological treatment of disease. In developing countries, where burden of disease is high with resource constraints dictating healthcare priorities; it is important to deliberate on risk/benefit of medications prescribed to treat disease...
July 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/28978238/ototoxicity-monitoring-through-the-eyes-of-the-treating-physician-perspectives-from-pulmonology-and-medical-oncology
#8
Angela C Garinis, Alexandra Cornell, Gopal Allada, Kevin P Fennelly, Ronald J Maggiore, Dawn Konrad-Martin
OBJECTIVES: Integrating audiological management into the care pathways of clinical specialties that prescribe ototoxic medications for essential, often life-preserving medical care that is critical for early hearing loss identification and remediation. Research shows that successful implementation of a new health service or intervention requires alignment of goals among provider groups, institutional leadership and patients. Thoughtful consideration of the physician's viewpoints about ototoxicity and its implications for treatment planning is, therefore, important for the implementation and enduring success of an ototoxicity monitoring programme (OMP)...
October 5, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28955207/hydrogen-inhalation-protects-against-ototoxicity-induced-by-intravenous-cisplatin-in-the-guinea-pig
#9
Anette E Fransson, Marta Kisiel, Kristian Pirttilä, Curt Pettersson, Pernilla Videhult Pierre, Göran F E Laurell
Introduction: Permanent hearing loss and tinnitus as side-effects from treatment with the anticancer drug cisplatin is a clinical problem. Ototoxicity may be reduced by co-administration of an otoprotective agent, but the results in humans have so far been modest. Aim: The present preclinical in vivo study aimed to explore the protective efficacy of hydrogen (H2) inhalation on ototoxicity induced by intravenous cisplatin. Materials and Methods: Albino guinea pigs were divided into four groups. The Cispt (n = 11) and Cispt+H2 (n = 11) groups were given intravenous cisplatin (8 mg/kg b...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28955205/micrornas-in-hearing-disorders-their-regulation-by-oxidative-stress-inflammation-and-antioxidants
#10
REVIEW
Kedar N Prasad, Stephen C Bondy
MicroRNAs (miRs) are small non-coding single-stranded RNAs that bind to their complimentary sequences in the 3'-untranslated regions (3'-UTRs) of the target mRNAs that prevent their translation into the corresponding proteins. Since miRs are strongly expressed in cells of inner ear and play a role in regulating their differentiation, survival and function, alterations in their expression may be involved in the pathogenesis of hearing disorders. Although increased oxidative stress and inflammation are involved in initiation and progression of hearing disorders, it is unknown whether the mechanisms of damage produced by these biochemical events on inner ear cells are mediated by altering the expression of miRs...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28955202/magnetic-nanoparticle-mediated-steroid-delivery-mitigates-cisplatin-induced-hearing-loss
#11
Bharath Ramaswamy, Soumen Roy, Andrea B Apolo, Benjamin Shapiro, Didier A Depireux
Cisplatin (cis-diamminedichloroplatinum) is widely used as a chemotherapeutic drug for genitourinary, breast, lung and head and neck cancers. Though effective in inducing apoptosis in cancer cells, cisplatin treatment causes severe hearing loss among patients. Steroids have been shown to mitigate cisplatin-induced hearing loss. However, steroids may interfere with the anti-cancer properties of cisplatin if administered systemically, or are rapidly cleared from the middle and inner ear and hence lack effectiveness when administered intra-tympanically...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28949262/monitoring-neonates-for-ototoxicity
#12
Angela C Garinis, Alison Kemph, Anne Marie Tharpe, Joern-Hendrik Weitkamp, Cynthia McEvoy, Peter S Steyger
OBJECTIVES: Neonates admitted to the neonatal intensive care unit (NICU) are at greater risk of permanent hearing loss compared to infants in well mother and baby units. Several factors have been associated with this increased prevalence of hearing loss, including congenital infections (e.g. cytomegalovirus or syphilis), ototoxic drugs (such as aminoglycoside or glycopeptide antibiotics), low birth weight, hypoxia and length of stay. The aetiology of this increased prevalence of hearing loss remains poorly understood...
June 22, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28940715/adverse-effects-of-a-single-dose-of-gentamicin-in-adults-a-systematic-review
#13
REVIEW
R S Hayward, J Harding, R Molloy, L Land, K Longcroft-Neal, D Moore, J D C Ross
AIM: Systematically review the frequency and type of adverse events associated with a single dose of intravenous or intramuscular gentamicin in adults, for any indication, in studies where a comparator was available. METHODS: A review protocol was developed and registered (PROSPERO: CRD42013003229). Studies were eligible for review if they; recruited participants ≥16 years old, used gentamicin intramuscularly or intravenously as a single one-off dose, compared gentamicin to another medication or placebo, and if adverse events were monitored...
September 21, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28934353/correction-coenzyme-q10-plus-multivitamin-treatment-prevents-cisplatin-ototoxicity-in-rats
#14
Laura Astolfi, Edi Simoni, Filippo Valente, Sara Ghiselli, Stavros Hatzopoulos, Milvia Chicca, Alessandro Martini
[This corrects the article DOI: 10.1371/journal.pone.0162106.].
2017: PloS One
https://www.readbyqxmd.com/read/28931463/severe-streptomycin-ototoxicity-in-the-mouse-utricle-leads-to-a-flat-epithelium-but-the-peripheral-neural-degeneration-is-delayed
#15
Guo-Peng Wang, Ishani Basu, Lisa A Beyer, Hiu Tung Wong, Donald L Swiderski, Shu-Sheng Gong, Yehoash Raphael
The damaged vestibular sensory epithelium of mammals has a limited capacity for spontaneous hair cell regeneration, which largely depends on the transdifferentiation of surviving supporting cells. Little is known about the response of vestibular supporting cells to a severe insult. In the present study, we evaluated the impact of a severe ototoxic insult on the histology of utricular supporting cells and the changes in innervation that ensued. We infused a high dose of streptomycin into the mouse posterior semicircular canal to induce a severe lesion in the utricle...
September 11, 2017: Hearing Research
https://www.readbyqxmd.com/read/28927990/down-for-the-count-the-critical-endpoint-in-ototoxicity-remains-the-cytocochleogram
#16
REVIEW
David V Gauvin, Joshua Yoder, Andrea Koch, Zachary J Zimmermann, Rachel L Tapp
There are three major assays that must be conducted in standard investigational new drug (IND) -enabling ototoxicity study designs: 1) functional acoustic threshold measurements (Auditory Brainstem Respsonse, ABR); 2) otohistopathology and 3) cytocochleograms. We provide evidence to demonstrate the unreliability of auditory threshold shifts (ABRs) to predict cochlear cell death and build a case for conducting full cochlea processing and cell count measurements from the complete cochlea from apex to base.
September 18, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28921839/hepatoblastoma-in-children-aged-less-than-six-months-at-diagnosis-a-report-from-the-siopel-group
#17
Patrizia Dall'Igna, Laurence Brugieres, Anne Sanlaville Christin, Rudolf Maibach, Michela Casanova, Rita Alaggio, Jean de Ville de Goyet, Jozsef Zsiros, Bruce Morland, Piotr Czauderna, Margaret Childs, Daniel C Aronson, Sophie Branchereau, Penelope Brock, Giorgio Perilongo
BACKGROUND: The purpose of this study was to evaluate clinical characteristics, treatment, and survival of children, who were diagnosed with hepatoblastoma (HB) in their first 6 months of age, enrolled in the SIOPEL 2 and 3 protocols. METHODS: Seventy-nine patients, treated between 1994 and 2006, were analyzed after stratification into three age groups: <1 month, between 1 and 3 months, and between 3 and 6 months. All received preoperative chemotherapy. RESULTS: Clinical characteristics were similar in both trials: 4 patients had pulmonary metastases at diagnosis, 4 had α-fetoprotein <100 ng/ml, 68 were operated by partial hepatectomy, and 7 received liver transplant...
September 18, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28893111/using-tablet-based-technology-to-deliver-time-efficient-ototoxicity-monitoring
#18
Douglas Brungart, Jaclyn Schurman, Dawn Konrad-Martin, Kelly Watts, Jay Buckey, Odile Clavier, Peter G Jacobs, Samuel Gordon, Marilyn F Dille
OBJECTIVE: The goal of this article is to highlight mobile technology that is not yet standard of care but could be considered for use in an ototoxicity monitoring programme (OMP) as an adjunct to traditional audiometric testing. Current guidelines for ototoxicity monitoring include extensive test protocols performed by an audiologist in an audiometric booth. This approach is comprehensive, but it may be taxing for patients suffering from life-threatening illnesses and cost prohibitive if it requires serial clinical appointments...
September 12, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28890772/knowledge-and-cultural-beliefs-of-mothers-regarding-the-risk-factors-of-infant-hearing-loss-and-awareness-of-audiology-services
#19
Samantha M Govender, Nasim Banu Khan
The aim of the paper is to describe the knowledge of mothers in Durban, South Africa, regarding risk factors of hearing loss in infants and their awareness of audiology services, and to describe their cultural beliefs about the risk factors for hearing loss in infants. A descriptive survey design with quantitative methods of analysis were used. Conveniently sampled mothers (n=102) receiving postnatal care for their infants from eight provincial clinics within Durban consented to participate, yielding a response rate of 48%...
June 23, 2017: Journal of Public Health in Africa
https://www.readbyqxmd.com/read/28890038/improving-the-efficiency-of-auditory-brainstem-responses-in-newborns-using-a-60clicks-s-stimulation-rate
#20
Lourdes Cubero-Rego, Josefina Ricardo-Garcell, María Corsi-Cabrera, Rogelio Cruz-Martínez, Carlos Rebolledo-Fernández, Gloria Otero-Ojeda, Thalía Harmony
Recent evidence suggests that Auditory Brainstem Responses (ABR), in neonates with risk factors for neurological damage, may show auditory brainstem abnormalities, even in patients with normal hearing. To compare the recording and diagnostic accuracy of neonatal Auditory Brainstem Responses (ABR), using 10 and 60clicks/s stimulation rates, two groups of neonates were prospectively studied: 30 healthy full-term neonates, with no peri- or postnatal complications; and 30 high-risk newborns with two or more of the following conditions: hyperbilirubinemia, use of ototoxic drugs, birth weight inferior to 1500g, perinatal sepsis, intraventricular hemorrhage, and/or mechanical ventilation...
November 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
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