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Yamada S, Kita J, Shinmura D, Nakamura Y, Sahara S, Misawa K, Nakanishi H. Update on Findings about Sudden Sensorineural Hearing Loss and Insight into Its Pathogenesis. J Clin Med 2022; 11:6387. [PMID: 36362614 PMCID: PMC9653771 DOI: 10.3390/jcm11216387] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/17/2022] [Accepted: 10/27/2022] [Indexed: 07/26/2023] Open
Abstract
Sudden sensorineural hearing loss (SSNHL) is routinely encountered and is one of the most common emergent diseases in otolaryngology clinics. However, the etiology of SSNHL remains unclear. Due to the inaccessibility of the living human inner ear for biopsy, studies investigating the etiology of SSNHL have been performed by analyzing data obtained from examinations using peripheral blood or imaging. We updated the findings obtained from serological, magnetic resonance imaging, genetic, and viral examinations to reveal the etiology of SSNHL. Regarding viral examination, we focused on sensorineural hearing loss associated with coronavirus disease (COVID-19) because the number of correlated reports has been increasing after the outbreak. The updated findings revealed the following three possible mechanisms underlying the development of SSNHL: thrombosis and resulting vascular obstruction in the cochlea, asymptomatic viral infection and resulting damage to the cochlea, and cochlear inflammation and resulting damage to the cochlea. Thrombosis and viral infection are predominant, and cochlear inflammation can be secondarily induced through viral infection or even thrombosis. The findings about sensorineural hearing loss associated with COVID-19 supported the possibility that asymptomatic viral infection is one of the etiologies of SSNHL, and the virus can infect inner ear tissues and directly damage them.
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Affiliation(s)
- Satoshi Yamada
- Department of Otorhinolaryngology/Head & Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Junya Kita
- Department of Otorhinolaryngology/Head & Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Daichi Shinmura
- Department of Otorhinolaryngology/Head & Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Yuki Nakamura
- Department of Otorhinolaryngology/Head & Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Sosuke Sahara
- Department of Otorhinolaryngology/Head & Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
- Department of Otorhinolaryngology, Numazu City Hospital, Numazu 410-0302, Japan
| | - Kiyoshi Misawa
- Department of Otorhinolaryngology/Head & Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Hiroshi Nakanishi
- Department of Otorhinolaryngology/Head & Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
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Abstract
PURPOSE OF REVIEW The reference method for low-density lipoprotein-cholesterol (LDL-C) quantitation is β-quantification, a technically demanding method that is not convenient for routine use. Indirect calculation methods to estimate LDL-C, including the Friedewald equation, have been used since 1972. This calculation has several recognized limitations, especially inaccurate results for triglycerides (TG) >4.5 mmol/l (>400 mg/dl). In view of this, several other equations were developed across the world in different datasets.The purpose of this review was to analyze the best method to calculate LDL-C in clinical practice by reviewing studies that compared equations with measured LDL-C. RECENT FINDINGS We identified 45 studies that compared these formulae. The Martin/Hopkins equation uses an adjustable factor for TG:very low-density lipoprotein-cholesterol ratios, validated in a large dataset and demonstrated to provide more accurate LDL-C calculation, especially when LDL <1.81 mmol/l (<70 mg/dl) and with elevated TG. However, it is not in widespread international use because of the need for further validation and the use of the adjustable factor. The Sampson equation was developed for patients with TG up to 9 mmol/l (800 mg/dl) and was based on β-quantification and performs well on high TG, postprandial and low LDL-C samples similar to direct LDL-C. SUMMARY The choice of equation should take into the level of triglycerides. Further validation of different equations is required in different populations.
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Affiliation(s)
- Janine Martins
- Department of Chemical Pathology, Faculty of Health Sciences, University of Pretoria and National Health Laboratory Service Tshwane Academic Division
- Department of Public Health Medicine, School of Health System & Public Health, University of Pretoria, Pretoria, South Africa
| | - H Muller Rossouw
- Department of Chemical Pathology, Faculty of Health Sciences, University of Pretoria and National Health Laboratory Service Tshwane Academic Division
| | - Tahir S Pillay
- Department of Chemical Pathology, Faculty of Health Sciences, University of Pretoria and National Health Laboratory Service Tshwane Academic Division
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Arslan K, Daldaban F, Kecici PD, Aksel EG, Ekiz B, Akyuz B, Yilmaz A, Akcay A, Iscan K. Relationship between transport-induced stress and the expression levels of some genes in the peroxisome proliferator-activated receptor (PPAR) signaling pathway in Kivircik lambs. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yang JCS, Huang LH, Wu SC, Wu YC, Wu CJ, Lin CW, Tsai PY, Chien PC, Hsieh CH. Recovery of Dysregulated Genes in Cancer-Related Lower Limb Lymphedema After Supermicrosurgical Lymphaticovenous Anastomosis – A Prospective Longitudinal Cohort Study. J Inflamm Res 2022; 15:761-773. [PMID: 35153500 PMCID: PMC8824698 DOI: 10.2147/jir.s350421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 01/15/2022] [Indexed: 11/23/2022] Open
Affiliation(s)
- Johnson Chia-Shen Yang
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Lien-Hung Huang
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shao-Chun Wu
- Department of Anesthesiology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Yi-Chan Wu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chia-Jung Wu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chia-Wei Lin
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Pei-Yu Tsai
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Peng-Chen Chien
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Ching-Hua Hsieh
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Correspondence: Ching-Hua Hsieh, Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, 123 Dapi Road, Niaosong District, Kaohsiung City, 833, Taiwan, Tel +886-7-7317123, ext.8002, Fax +886-7-7354309, Email
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Shao M, Xiong G, Xiang G, Xu S, Zhang L. Correlation between serum lipid and prognosis of idiopathic sudden sensorineural hearing loss: a prospective cohort study. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:676. [PMID: 33987374 PMCID: PMC8106097 DOI: 10.21037/atm-21-907] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/01/2021] [Indexed: 12/26/2022]
Abstract
BACKGROUND To investigate the correlation between blood lipids and the prognosis of idiopathic sudden sensorineural hearing loss (ISSNHL). METHODS We included 232 patients with ISSNHL at the Second Affiliated Hospital of Shanghai University from June 2015 to March 2017 using a prospective cohort study design. We collected information including age, gender, hypertension, diabetes, mellitus, vertigo, as well as the levels of blood total cholesterol (TC), triglycerides (TG), and low-density lipoproteins (LDL-C). We also recorded the ratio between the levels of low-density lipoproteins and the levels of high-density lipoproteins (LDL-C/HDL-C ratio). Correlations between the prognosis of ISSNHL and TC, TG, LDL-C, and LDL-C/HDL-C ratio were analyzed by univariable and multivariable logistic regression analyses. RESULTS The clinical effectiveness rate of patients with TC ranging from 5.2 to 6.2 mmol/L was significantly higher than that of patients with TC <5.2 mmol/L (P<0.001). No notable difference was found between patients with TC <5.2 mmol/L and patients with TC ≥6.2 mmol/L. The clinical effectiveness rate of patients in TG ranging from 1.7 mmol/L to 2.3 mmol/L was markedly higher than those in TG <1.7 mmol/L (P<0.001). No significant difference was found between patients with TG ranging from 2.3 to 5.6 mmol/L, TG ≥5.6 mmol/L, and TG <1.7 mmol/L. The clinical effectiveness rate of patients in LDL-C/HDL-C <1.5 was considerably higher than those in LDL-C/HDL-C ranging from 1.5 to 2.5, 2.5 to 3.5, and ≥3.5 (P<0.001). CONCLUSIONS Our findings indicated that TC, TG, and the LDL-C/HDL-C ratio are strongly associated with the prognosis of ISSNHL. These three indices could be recommended as independent markers to predict outcomes.
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Affiliation(s)
- Minmin Shao
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Shanghai University (Wenzhou Central Hospital), Wenzhou, China
| | - Guofeng Xiong
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Shanghai University (Wenzhou Central Hospital), Wenzhou, China
| | - Guangzao Xiang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Shanghai University (Wenzhou Central Hospital), Wenzhou, China
| | - Shile Xu
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Shanghai University (Wenzhou Central Hospital), Wenzhou, China
| | - Liqun Zhang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Shanghai University (Wenzhou Central Hospital), Wenzhou, China
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