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Shankar V, Seethapathy J, Srinivas S, Nandhan R, Saravanam PK. Prevailing Practices in Ototoxicity Monitoring in Individuals With Head and Neck Cancer Undergoing Radiotherapy and Chemoradiotherapy: A Scoping Review. Am J Audiol 2024; 33:1041-1069. [PMID: 39052439 DOI: 10.1044/2024_aja-24-00028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024] Open
Abstract
PURPOSE The aim of the current scoping review is to identify the studies reporting ototoxicity monitoring in individuals with head and neck cancer (HNC) undergoing radiation therapy and/or chemoradiation therapy across the world. The specific objectives were to identify and report the test protocol used, identify the most common timeline of follow-up, and identify barriers and facilitators influencing the implementation of the monitoring program. METHOD A comprehensive search was conducted across six electronic databases, including PubMed, Embase, Web of Science, Scopus, Google Scholar, and ProQuest. The scoping review method adhered to relevant guidelines (Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews) and frameworks. The database search was carried out by two independent researchers, and studies were selected based on specific inclusion and exclusion criteria. RESULTS This scoping review identified 13 studies that fulfilled the inclusion criteria of this study. Only one study reported findings from the perspective of ototoxicity monitoring. Another study explicitly mentioned that ototoxicity monitoring was a standard of care in their hospital. Only one study reported using the relevant guidelines for monitoring ototoxicity. Specialized tests such as high-frequency audiometry, distortion product otoacoustic emissions, and vestibular tests were rarely used. Ototoxicity monitoring was influenced by awareness-related factors, technical factors, treatment-related factors, and organizational factors. CONCLUSIONS Research on ototoxicity monitoring programs is in its early stages, highlighting the need for standardized practices and multidisciplinary collaboration to enhance health care services for HNC patients. A standardized approach, improved awareness, and the incorporation of patient perspectives are crucial to enhancing ototoxicity monitoring in HNC patients.
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Affiliation(s)
- Varsha Shankar
- Department of Audiology, Sri Ramachandra Faculty of Audiology and Speech Language Pathology, Sri Ramachandra Institute of Higher Education and Research (DU), Chennai, India
| | - Jayashree Seethapathy
- Department of Audiology, Sri Ramachandra Faculty of Audiology and Speech Language Pathology, Sri Ramachandra Institute of Higher Education and Research (DU), Chennai, India
| | - Satish Srinivas
- Department of Radiation Oncology, Sri Ramachandra Institute of Higher Education and Research (DU), Chennai, India
| | - Raghu Nandhan
- Department of ENT-Head & Neck Surgery, Madras ENT Research Foundation, Chennai, Tamil Nadu, India
| | - Prasanna Kumar Saravanam
- Department of ENT, Head and Neck Surgery, Sri Ramachandra Institute of Higher Education and Research (DU), Chennai, India
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He S, Yu H, He L, Liu M, He Y, Peng X, Ai P. Risk factors associated with ototoxicity in long-term nasopharyngeal carcinoma survivors. Oral Oncol 2024; 154:106827. [PMID: 38735130 DOI: 10.1016/j.oraloncology.2024.106827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Revised: 04/26/2024] [Accepted: 04/27/2024] [Indexed: 05/14/2024]
Abstract
PURPOSE To investigate patient-reported outcomes among long-term survivors and to analyze their associated risk factors to provide better treatment and symptom management for nasopharyngeal carcinoma patients. MATERIALS AND METHODS This retrospective study collected patients diagnosed with nasopharyngeal carcinoma who received radical intensity-modulated radiotherapy in our hospital from June 2009 to June 2016. The patients' disease status and patient-reported outcomes were analyzed by follow-up. The ototoxicity was graded according to CTCAE 5.0. RESULTS A total of 223 patients were included in the study. Among the enrolled patients, the median follow-up time was 8.4 (6.0-13.0) years. Based on the patient-reported outcomes, ototoxicity was the most common symptom (52.9 %). After univariable and multivariable logistic regression, age ≥ 50 years old (OR, 4.066; 95 % CI, 1.799-9.190; P = .001), diabetes (OR, 3.520; 95 % CI, 1.442-8.591; P = .006), D2 ≥ 69 Gy (OR, 3.715; 95 % CI, 1.064-12.969; P = . 040) and V35 ≥ 91.5 % (OR, 3.398; 95 % CI, 1.113-10.372; P = .032) were associated with a higher incidence of grade 3-4 ototoxicity. Then, we constructed the individual nomogram and the C index of the graph was 0.815. By univariable logistic regression, we found that grade 3-4 ototoxicity was associated with an increased risk of multiple other symptoms, dysmasesia, tongue dysfunction, hoarseness, dysphagia and ocular toxicity. CONCLUSION In long-term survivors of nasopharyngeal carcinoma patients receiving IMRT, the most common patient-reported outcome was ototoxicity. Age ≥ 50 years, diabetes, ear exposure dose of D2 ≥ 69 Gy and V35 ≥ 91.5 % are independent risk factors for grade 3-4 ototoxicity.
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Affiliation(s)
- Shuangshuang He
- Department of Radiation Oncology and Department of Head and Neck Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Hang Yu
- Department of Radiotherapy Physics & Technology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ling He
- Department of Biotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Mengyuan Liu
- Department of Radiation Oncology and Department of Head and Neck Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yan He
- Department of Oncology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xingchen Peng
- Department of Biotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
| | - Ping Ai
- Department of Radiation Oncology and Department of Head and Neck Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
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Chow JCH, Ho JCS, Cheung KM, Johnson D, Ip BYM, Beitler JJ, Strojan P, Mäkitie AA, Eisbruch A, Ng SP, Nuyts S, Mendenhall WM, Babighian S, Ferlito A. Neurological complications of modern radiotherapy for head and neck cancer. Radiother Oncol 2024; 194:110200. [PMID: 38438018 DOI: 10.1016/j.radonc.2024.110200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/21/2024] [Accepted: 02/29/2024] [Indexed: 03/06/2024]
Abstract
Radiotherapy is one of the mainstay treatment modalities for the management of non-metastatic head and neck cancer (HNC). Notable improvements in treatment outcomes have been observed in the recent decades. Modern radiotherapy techniques, such as intensity-modulated radiotherapy and charged particle therapy, have significantly improved tumor target conformity and enabled better preservation of normal structures. However, because of the intricate anatomy of the head and neck region, multiple critical neurological structures such as the brain, brainstem, spinal cord, cranial nerves, nerve plexuses, autonomic pathways, brain vasculature, and neurosensory organs, are variably irradiated during treatment, particularly when tumor targets are in close proximity. Consequently, a diverse spectrum of late neurological sequelae may manifest in HNC survivors. These neurological complications commonly result in irreversible symptoms, impair patients' quality of life, and contribute to a substantial proportion of non-cancer deaths. Although the relationship between radiation dose and toxicity has not been fully elucidated for all complications, appropriate application of dosimetric constraints during radiotherapy planning may reduce their incidence. Vigilant surveillance during the course of survivorship also enables early detection and intervention. This article endeavors to provide a comprehensive review of the various neurological complications of modern radiotherapy for HNC, summarize the current incidence data, discuss methods to minimize their risks during radiotherapy planning, and highlight potential strategies for managing these debilitating toxicities.
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Affiliation(s)
- James C H Chow
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong Special Administrative Region.
| | - Jason C S Ho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong Special Administrative Region
| | - Ka Man Cheung
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong Special Administrative Region
| | - David Johnson
- Department of Clinical Oncology, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Bonaventure Y M Ip
- Division of Neurology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Jonathan J Beitler
- Harold Alfond Center for Cancer Care, Maine General Hospital, Augusta, ME, USA
| | - Primož Strojan
- Department of Radiation Oncology, Institute of Oncology, Ljubljana, Slovenia
| | - Antti A Mäkitie
- Department of Otorhinolaryngology, Head and Neck Surgery, Research Program in Systems Oncology, Faculty of Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Avraham Eisbruch
- Department of Radiation Oncology, University of Michigan Medicine, Ann Arbor, MI, USA
| | - Sweet Ping Ng
- Department of Radiation Oncology, Olivia Newton-John Cancer Centre, Austin Health, Melbourne, Australia
| | - Sandra Nuyts
- Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, KU Leuven - University of Leuven, Leuven, Belgium; Laboratory of Experimental Radiotherapy, Department of Oncology, University of Leuven, Leuven, Belgium
| | - William M Mendenhall
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Silvia Babighian
- Department of Ophthalmology, Ospedale Sant'Antonio, Azienda Ospedaliera, Padova, Italy
| | - Alfio Ferlito
- Coordinator of the International Head and Neck Scientific Group, Padua, Italy
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Correa-Morales JE, Giraldo-Moreno S, Mantilla-Manosalva N, Cuellar-Valencia L, Borja-Montes OF, Bedoya-Muñoz LJ, Iriarte-Aristizábal MF, Quintero-Muñoz E, Zuluaga-Liberato AM. Prevention and treatment of cisplatin-induced ototoxicity in adults: A systematic review. Clin Otolaryngol 2024; 49:1-15. [PMID: 37818931 DOI: 10.1111/coa.14106] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 09/04/2023] [Accepted: 09/23/2023] [Indexed: 10/13/2023]
Abstract
OBJECTIVES Ototoxicity is a common disabling side effect of platinum-based chemotherapy. This study aimed to assess the evidence on the management of platinum-induced ototoxicity in adult cancer patients. METHODS Four databases were searched up to 1 November 2022. Original studies were included if they reported on a pharmacologic or non-pharmacologic intervention to prevent or treat platinum ototoxicity in adults. The articles' quality was assessed via two grading scales. RESULTS Nineteen randomised controlled trials and five quasi-experimental studies with 1673 patients were analysed. Eleven interventions were identified, nine pharmacological and two non-pharmacological. Six of the interventions (sodium thiosulphate, corticoids, sertraline, statins, multivitamins and D-methionine) showed mild benefits in preventing cisplatin-induced ototoxicity. Only one trial assessed corticoids as a potential treatment. Overall, only six trials were deemed with a low risk of bias. The majority of studies inadequately documented intervention-related adverse effects, thereby limiting safety conclusions. CONCLUSIONS Current interventions have mild benefits in preventing cisplatin-induced ototoxicity in adult cancer patients. Sodium thiosulphate is the most promising intervention as a preventive strategy. Rigorous, high-quality research is warranted, encompassing an evaluation of all potential symptoms and innovative treatment modalities.
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Affiliation(s)
- Juan Esteban Correa-Morales
- Palliative Care Program, Universidad de La Sabana, Bogotá, Colombia
- Instituto Nacional de Cancerología, Bogotá, Colombia
| | | | - Nidia Mantilla-Manosalva
- Palliative Care Program, Universidad de La Sabana, Bogotá, Colombia
- Instituto Nacional de Cancerología, Bogotá, Colombia
| | - Laura Cuellar-Valencia
- Palliative Care Program, Universidad de La Sabana, Bogotá, Colombia
- Instituto Nacional de Cancerología, Bogotá, Colombia
| | | | - Lennis Jazmin Bedoya-Muñoz
- Palliative Care Program, Universidad de La Sabana, Bogotá, Colombia
- Instituto Nacional de Cancerología, Bogotá, Colombia
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Chen L, Li J, Li K, Hu J, Li Q, Huang C, Wang G, Liu N, Tang L. Evaluation and analysis of risk factors of hearing impairment for nasopharyngeal carcinoma treated using intensity-modulated radiotherapy. Radiother Oncol 2024; 190:109985. [PMID: 37926330 DOI: 10.1016/j.radonc.2023.109985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/09/2023] [Accepted: 10/29/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND Treating nasopharyngeal carcinoma (NPC) with radiotherapy frequently causes hearing impairment (HI). HI risk data haven't been evaluated quantitatively. This study aimed to analyze the probability of HI and sever HI (SHI), develop a nomogram to quantify individual prediction, and provide dose limitation suggestions. METHODS AND MATERIALS This single-center, retrospective study was conducted based on 588 adolescents and young adults with non-metastatic NPC treated using intensity modulated radiation therapy (IMRT) at Sun Yat-sen University Cancer Center between 2010 and 2016. A least absolute shrinkage and selection operator (LASSO) logistic regression model and univariate analysis were used to screen potential risk factors. The concordance index and a calibration curve evaluated the nomogram models' predictive ability, with bootstrap resampling validation. RESULTS We analyzed 588 patients with NPC, with a median follow-up of 103.4 months. HI occurred in 39.5 % of patients, with 29.7 % experiencing SHI. Two factors were classified as precursors for HI (volume 45 Gy of the inner ear (IEV45) and volume 50 Gy of the internal auditory canal (IACV50)), and IACmin and IACV60 for SHI, respectively. Prognostic nomograms were developed to predict HI and SHI probabilities, showing excellent discriminative abilities (c-index values = 0.806 and 0.793, respectively). We also suggested IEV45 < 50 % and/or IACV50 < 40 % as rational dose limitations for HI, and IACmin < 44 Gy and/or the IACV60 < 40 % for SHI. CONCLUSION Comprehensive analysis could predict the risk of HI and SHI in NPC after IMRT, proposing rational dose limitations and improving long-term quality of life.
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Affiliation(s)
- Lin Chen
- Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China
| | - Jing Li
- Department of Oncology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong 518107, PR China
| | - Kunpeng Li
- Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China
| | - Jiang Hu
- Department of Radiation Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, PR China
| | - Qingjie Li
- Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China; Department of Experimental Research, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China
| | - Chenglong Huang
- Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China
| | - Gaoyuan Wang
- Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China
| | - Na Liu
- Department of Experimental Research, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China.
| | - Linglong Tang
- Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong 510060, PR China.
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Yip PL, Mok KCJ, Ho HS, Lee WYV, Wong ACL, Lau CT, Wong FCS, Yeung KW, Lee SF. Sensorineural Hearing Loss in Nasopharyngeal Carcinoma Survivors in the Modern Treatment Era - The Early and Late Effects of Radiation and Cisplatin. Clin Oncol (R Coll Radiol) 2021; 34:e160-e167. [PMID: 34772581 DOI: 10.1016/j.clon.2021.10.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 09/25/2021] [Accepted: 10/21/2021] [Indexed: 12/08/2022]
Abstract
AIMS Hearing loss is a common debilitating complication in nasopharyngeal carcinoma (NPC) survivors. The aim of the present study was to investigate the impact of inner ear/cochlear radiation dose and cisplatin use on early and late sensorineural hearing loss (SNHL) in NPC patients treated with radiotherapy alone, concurrent chemoradiation (cCRT) and induction chemotherapy followed by cCRT (iCRT) in the intensity-modulated radiotherapy era. MATERIALS AND METHODS The study included 81 NPC patients treated with intensity-modulated radiotherapy between 2014 and 2016. Pure tone audiometry was carried out at baseline and follow-up. The effects of cochlear/inner ear radiation and cisplatin doses on early (<12 months) and late (≥24 months) SNHL were analysed using multivariable regression after adjusting for important predictors. RESULTS In total, 156 ears were examined. In early SNHL (n = 136), cisplatin use predicted the incidence of early high-frequency SHNL (HF-SNHL) (odds ratio 6.4, 95% confidence interval 1.7-23.9, P = 0.005). Ninety ears were analysed for late SNHL (median follow-up 38 months). Inner ear/cochlear radiation and cisplatin doses and better pre-treatment hearing were independent predictors of threshold change at 4 kHz. Every 10 Gy increase in inner ear/cochlear Dmean resulted in 5-dB and 6-dB threshold changes, respectively (cochlear Dmean: B = 0.005, 95% confidence interval 0.0004-0.009, P = 0.031; inner ear Dmean: B = 0.006, 95% confidence interval 0.001-0.010, P = 0.014). Cisplatin use was associated with late HF-SNHL (odds ratio 3.74, 95% confidence interval 1.1-12.3, P = 0.031). In the cCRT and iCRT subgroups, no cisplatin dose-dependent ototoxicity was observed. Severe (≥30 dB) late HF-SNHL occurred in 14% and 25% of the patients when the cochlear dose constraints were 40 Gy and 44 Gy, respectively. The radiotherapy-alone group did not develop severe late HF-SNHL. CONCLUSION Cochlear/inner ear radiation dose and cisplatin use showed differential and independent ototoxicity in early and late SNHL. As cochlear/inner ear dose-dependent ototoxicity was demonstrated, the cochlear dose constraint should be as low as reasonably achievable, especially when cisplatin is also administered.
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Affiliation(s)
- P L Yip
- Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - K C J Mok
- Department of Otorhinolaryngology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - H S Ho
- Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - W Y V Lee
- Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - A C L Wong
- Department of Otorhinolaryngology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - C T Lau
- Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - F C S Wong
- Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - K W Yeung
- Department of Otorhinolaryngology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - S F Lee
- Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong; Department of Clinical Oncology, University of Hong Kong, Hong Kong.
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Comparison of Long-Term Outcomes and Sequelae Between Children and Adult Nasopharyngeal Carcinoma Treated With Intensity Modulated Radiation Therapy. Int J Radiat Oncol Biol Phys 2020; 106:848-856. [DOI: 10.1016/j.ijrobp.2019.11.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 10/29/2019] [Accepted: 11/26/2019] [Indexed: 12/24/2022]
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Zhao C, Liu Y, Liang Z, Feng H, Xu S. MACC1 facilitates the escape of nasopharyngeal carcinoma cells from killing by natural killer cells. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1596041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Chong Zhao
- Department of Otorhinolaryngology and Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, P.R. China
| | - Yuehua Liu
- Department of Otorhinolaryngology and Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, P.R. China
| | - Zhuoping Liang
- Department of Otorhinolaryngology and Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, P.R. China
| | - Huajun Feng
- Department of Otorhinolaryngology and Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, P.R. China
| | - Sheng’en Xu
- Department of Otorhinolaryngology and Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, P.R. China
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