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Yu X, Zhang H, Zong S, Xiao H. Allergy in pathogenesis of Eustachian Tube Dysfunction. World Allergy Organ J 2024; 17:100860. [PMID: 38274710 PMCID: PMC10809091 DOI: 10.1016/j.waojou.2023.100860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 10/12/2023] [Accepted: 12/11/2023] [Indexed: 01/27/2024] Open
Abstract
Eustachian tube dysfunction (ETD) is a condition where the Eustachian tube (ET) fails to function normally, resulting in symptoms such as aural fullness, tinnitus, autophony, and hearing loss. ETD can further lead to middle ear diseases such as otitis media effusion and adhesive otitis media, which is becoming more common in the field of otology. Although the pathogenesis of ETD remains unclear, recent animal studies and clinical experiments have found allergic reactions and allergic diseases are closely related to the occurrence of ETD. As the mucosa of the ET is continuous with that of the nasopharynx and tympanic cavity, it is reasonable to assume that the immunological basis of the ET itself is similar to that of respiratory allergic diseases. However, due to the special anatomical location and complex pathogenesis of the ET, there is still no unified diagnostic gold standard. Additionally, there is an ongoing debate regarding whether ETD can be classified as a distinct disease or even an allergic disease. Furthermore, the effectiveness of anti-allergic therapy in patients with ETD is yet to be fully understood. Therefore, this review elaborates on the possible mechanisms of allergic reactions in the occurrence and development of ETD, and explores the potential role of anti-allergic therapy in managing this condition, in order to provide new insights into the pathogenesis and prevention of ETD.
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Affiliation(s)
| | | | - Shimin Zong
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Hongjun Xiao
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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Azar A, Bhutta MF, Del-Pozo J, Milne E, Cheeseman M. Trans-cortical vessels in the mouse temporal bulla bone are a means to recruit myeloid cells in chronic otitis media and limit peripheral leukogram changes. Front Genet 2022; 13:985214. [PMID: 36246635 PMCID: PMC9555619 DOI: 10.3389/fgene.2022.985214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 08/29/2022] [Indexed: 11/13/2022] Open
Abstract
Chronic otitis media, inflammation of the middle ear, is a sequel to acute otitis media in ∼8% of children. Chronic otitis media with effusion is the most common cause of childhood deafness and is characterised by effusion of white blood cells into the auditory bulla cavity. Skull flat bones have trans-cortical vessels which are responsible for the majority of blood flow in and out of the bone. In experimental models of stroke and aseptic meningitis there is preferential recruitment of myeloid cells (neutrophils and monocytes) from the marrow in skull flat bones. We report trans-cortical vessels in the mouse temporal bone connect to the bulla mucosal vasculature and potentially represent a means to recruit myeloid cells directly into the inflamed bulla. The mutant mouse strains Junbo (MecomJbo/+) and Jeff (Fbxo11Jf/+) develop chronic otitis spontaneously; MecomJbo/+ mice have highly cellular neutrophil (90%) rich bulla exudates whereas Fbxo11Jf/+ mice have low cellularity serous effusions (5% neutrophils) indicating differing demand for neutrophil recruitment. However we found peripheral leukograms of MecomJbo/+ and Fbxo11Jf/+ mice are similar to their respective wild-type littermate controls with healthy bullae and infer preferential mobilization of myeloid cells from temporal bulla bone marrow may mitigate the need for a systemic inflammatory reaction. The cytokines, chemokines and haematopoietic factors found in the inflamed bulla represent candidate signalling molecules for myeloid cell mobilization from temporal bone marrow. The density of white blood cells in the bulla cavity is positively correlated with extent of mucosal thickening in MecomJbo/+, Fbxo11Jf/+, and EdaTa mice and is accompanied by changes in epithelial populations and bone remodelling. In MecomJbo/+ mice there was a positive correlation between bulla cavity WBC numbers and total bacterial load. The degree of inflammation varies between contralateral bullae and between mutant mice of different ages suggesting inflammation may wax and wane and may be re-initiated by a new wave of bacterial infection. Clearance of white blood cells and inflammatory stimuli from the bulla cavity is impaired and this may create a pro-inflammatory feedback loop which further exacerbates otitis media and delays its resolution.
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Affiliation(s)
- Ali Azar
- Developmental Biology Division, Roslin Institute and The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, United Kingdom
| | - Mahmood F. Bhutta
- Brighton and Sussex Medical School, Brighton, United Kingdom
- Department of ENT, Royal Sussex County Hospital, Brighton, United Kingdom
| | - Jorge Del-Pozo
- Veterinary Pathology, The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, United Kingdom
| | - Elspeth Milne
- Veterinary Pathology, The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, United Kingdom
| | - Michael Cheeseman
- Developmental Biology Division, Roslin Institute and The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, United Kingdom
- Division of Pathology, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, Scotland, United Kingdom
- Centre for Comparative Pathology, Division of Pathology, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, Scotland, United Kingdom
- *Correspondence: Michael Cheeseman,
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Wu D, Yang Y, Duan C. Cell division cycle 42 positively correlates with T helper 2 cytokine, effusion viscosity, and hearing loss degree in otitis media with effusion patients. J Clin Lab Anal 2022; 36:e24681. [PMID: 36164754 DOI: 10.1002/jcla.24681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/11/2022] [Accepted: 08/17/2022] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE Cell division cycle 42 (CDC42) participates in the pathogenesis of some T-cell-mediated inflammatory diseases via regulating CD4+ T-cell differentiation and inflammation response. This study aimed to evaluate the correlation of CDC42 and T helper (Th)1/Th2 cytokines with disease risk, effusion viscosity, and hearing loss degree of otitis media with effusion (OME). METHODS CDC42, interleukin (IL)-4, and interferon-gamma (IFN-γ) in effusion and serum of 78 OME patients were determined by enzyme-linked immunosorbent assay. Besides, the effusion (irrigating fluid) and serum samples of 30 controls (adenoid hypertrophy patients without OME) were also obtained for CDC42, IL-4, and IFN-γ determination. RESULTS Effusion CDC42 and IL-4 were elevated in OME patients compared with controls (both p < 0.001). Effusion CDC42 was positively correlated with effusion IL-4 in OME patients (p = 0.004) and controls (p = 0.012) but was not related to effusion IFN-γ (both p > 0.050). Additionally, effusion CDC42 (p = 0.025) and IL-4 (p = 0.023) were increased in OME patients with mucoid effusion compared to patients with serous effusion, while effusion IFN-γ was of no difference between those patients (p = 0.215). Meanwhile, elevated effusion CDC42 (p = 0.012) and IL-4 (p = 0.033) were linked with increased hearing loss degrees, whereas effusion IFN-γ was not related to hearing loss degrees (p = 0.057). Moreover, the findings of serum CDC42, IL-4, and IFN-γ showed similar trends as effusion ones; nonetheless, their correlation with disease features was generally weaker. CONCLUSION OME patients present with elevated CDC42 and IL-4 levels; the latter factors are intercorrelated and positively associate with effusion viscosity and hearing loss degree.
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Affiliation(s)
- Dan Wu
- Department of Otolaryngology, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Yang
- Department of Otolaryngology, Xiangyang Hospital of Traditional Chinese Medicine, Hubei University of Chinese Medicine, Xiangyang, China
| | - Chuanxin Duan
- Department of Otolaryngology, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Zhang N, Qian T, Sun S, Cao W, Wang Z, Liu D, Li P, Wu J, Li H, Yang J. IL-17 is a Potential Therapeutic Target in a Rodent Model of Otitis Media with Effusion. J Inflamm Res 2022; 15:635-648. [PMID: 35140496 PMCID: PMC8818970 DOI: 10.2147/jir.s338598] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 01/21/2022] [Indexed: 11/23/2022] Open
Abstract
Background Otitis media with effusion (OME) is a non-suppurative inflammation of the middle ear that is characterized by middle ear effusion and hearing loss. However, the mechanisms of OME are not fully understood. The aim of this study was to determine the function and the mechanism of the IL-17 cytokine in the pathogenesis of OME and to investigate IL-17 as a potential strategy for the treatment of OME. Methods In this study, the OME rat model was induced by ovalbumin (OVA) as previously described. The severity of OME was determined with an oto-endoscope, by histochemical analysis, and by acoustic immittance. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis of RNA-sequencing (RNA-seq) data was carried out to analyze the signaling pathways related to the pathogenesis of OME, which indicated that IL-17 is involved in OME. The anti-IL-17A monoclonal antibody was administrated by nasal drip to block IL-17 to treat OME in the rat model. The rats were finally injected intraperitoneally with the inhibitor of Notch signaling pathway to study the mechanisms of IL-17-induced inflammation. Serum and lavage fluid were collected for the detection of related cytokines, and middle ear tissue was collected for Western blot, quantitative real-time PCR (qRT-PCR), and immunohistochemical and immunofluorescence analysis. Results KEGG analysis of RNA-seq data suggested that the IL-17 signaling pathway might be involved in the onset of OME. IL-17 expression was confirmed to be increased in both the serum and the middle ear of the rat model. The monoclonal antibody against IL-17 neutralized IL-17, inhibited the inflammation in the middle ear, and reduced the overall severity of OME in vivo. Furthermore, the Notch signaling pathway was activated upon IL-17 upregulation in OME and was suppressed by IL-17 blockage. However, there was no change in IL-17 expression after Notch inhibitor treatment, which reduced the severity of OME in the rat middle ear. Conclusion IL-17 plays a key role in the pathogenesis of the OVA-induced OME rat model. IL-17 induced inflammatory responses via the Notch signaling pathway and targeting IL-17 might be an effective approach for OME therapy.
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Affiliation(s)
- Nanfeng Zhang
- Department of ENT, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230031, People’s Republic of China
| | - Tingting Qian
- Department of ENT Institute and Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine Research, Fudan University, Shanghai, 200032, People’s Republic of China
| | - Shan Sun
- Department of ENT Institute and Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine Research, Fudan University, Shanghai, 200032, People’s Republic of China
| | - Wei Cao
- Department of ENT, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230031, People’s Republic of China
| | - Zhixian Wang
- Department of ENT, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230031, People’s Republic of China
| | - Danling Liu
- Department of ENT Institute and Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine Research, Fudan University, Shanghai, 200032, People’s Republic of China
| | - Peifan Li
- Department of ENT Institute and Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine Research, Fudan University, Shanghai, 200032, People’s Republic of China
| | - Jingfang Wu
- Department of ENT Institute and Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine Research, Fudan University, Shanghai, 200032, People’s Republic of China
| | - Huawei Li
- Department of ENT, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230031, People’s Republic of China
- Department of ENT Institute and Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine Research, Fudan University, Shanghai, 200032, People’s Republic of China
| | - Jianming Yang
- Department of ENT, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230031, People’s Republic of China
- Correspondence: Jianming Yang; Huawei Li, Email ;
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Liu S, Guo L, Chen M, Liu W, Li Y, Wang X, Li S, Zhang J, Ni X. Evaluation of Caspase-1, Interleukin-1β, and Interleukin-18, in the Middle Ear Effusion in Children With Otitis Media With Effusion. Front Pediatr 2021; 9:732973. [PMID: 34805037 PMCID: PMC8602791 DOI: 10.3389/fped.2021.732973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 10/11/2021] [Indexed: 12/15/2022] Open
Abstract
Objectives: The present study aimed to assess the expression of caspase-1 and caspase-1-dependent processing of cytokines, such as interleukin (IL)-1β and IL-18, in the middle ear effusion of children with otitis media with effusion (OME) in order to identify the potential role of inflammasomes in OME. Methods: This study included 29 children scheduled for myringotomy with the insertion of tympanostomy tubes due to OME. Middle ear effusion (MEE) was collected during the surgery. Caspase-1, IL-1β, and IL-18 were assayed using enzyme-linked immunosorbent assay kits. The levels were compared between those with mucoid and serous MEE and those with and without a history of ventilation tube insertion. Results: Caspase-1, IL-1β, and IL-18 were detected in all samples. The caspase-1, IL-1β, and IL-18 levels did not significantly differ between mucoid samples and serous samples. No statistical significances were discovered in caspase-1, IL-1β, and IL-18 levels between with and without a history of ventilation tube groups. There was a significant negative correlation between IL-1β and IL-18 and the duration of OME (p < 0.05). However, no significant correlation was found between caspase-1 and disease duration. Conclusions: Inflammasomes may participate in the inflammatory process of OME. IL-1β and IL-18 levels in the MEE decreased over time.
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Affiliation(s)
- Shanshan Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Lining Guo
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Min Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Wei Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Yanhong Li
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Xiaoxu Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Shilan Li
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Jie Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
| | - Xin Ni
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery, Beijing, China
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Hurst DS, Denne CM. The Relation of Allergy to Eustachian Tube Dysfunction and the Subsequent Need for Insertion of Pressure Equalization Tubes. EAR, NOSE & THROAT JOURNAL 2020; 99:39S-47S. [PMID: 32320297 DOI: 10.1177/0145561320918805] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
INTRODUCTION The most basic question to be answered in each case in which the choice of using a pressure equalization tube (PET) is being considered is: "what is the underlying pathophysiology of the middle ear disease being addressed?" METHODS We will evaluate the hypothesis that the Eustachian Tube (ET) may become "dysfunctional" due to allergic mucosal edema and obstruction. We review the literature that evaluates the role of ET, the proposed affect that allergy may contribute to ET dysfunction (ETD), and the relation of allergic rhinitis to otitis. RESULTS Proof that allergy affects the middle ear was supported by (1) over a dozen investigators using objective immunotherapy demonstrating over the past 70 years that 72% to 100% of the children with otitis media with effusion (OME) are atopic, (2) an association of allergic Th2 immune-mediated histochemical reactivity within the target organ itself, (3) establishment that inflammation within the middle ear is truly allergic in nature, and (4) direct evidence of a dose-response curve and consistency of results, which confirm that OME resolves on allergy immunotherapy. CONCLUSION Current medical evidence should heighten the awareness of physicians of the physiology that underlies ETD. The evidence supports the link between allergy and OME. The middle ear behaves like the rest of the respiratory tract, and what has been learned about the atopic response in the sinuses and lungs may be applied to the study of the immunologic mechanisms within the middle ear that lead to ETD requiring the use of PET.
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Affiliation(s)
- David S Hurst
- Otolaryngology, 1867Tufts University, Boston, MA, USA
| | - Carter M Denne
- 6595University of Pittsburg Medical Center, Erie, PA, USA
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Korkmazov MY, Kryukov AI, Dubinets ID, Tyuhay MV, Uchaev DA, Markelov AV. [Evaluation of structural changes of bone in chronic purulent otitis media]. Vestn Otorinolaringol 2019; 84:12-17. [PMID: 30938335 DOI: 10.17116/otorino20198401112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Fragments of bone tissue of the temporal bone, obtained during reconstructive-sanitizing operations in patients with chronic purulent otitis media, were studied by light and electron microscopy. An analysis was made of the degree of structural changes in bone tissue in chronic inflammation at the cellular and tissue levels after a histomorphological study in microwave decalcification. The method of diagnosis reliably allowed to differentiate the diseases characterized by the rarefaction of bone tissue, due to chronic inflammation, and also to determine the processes of transformation of bone tissue. The method of diagnosis reliably allows to differentiate diseases characterized by the rarefaction of bone tissue due to chronic inflammation, as well as to determine the processes of bone tissue transformation, however, the study is time-consuming, long-lasting and expensive.
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Affiliation(s)
- M Yu Korkmazov
- Federal State Budgetary Educational Institution of Higher Education 'South Urals State Medical University' of the Ministry of Healthcare of the Russian Federation, Chelyabinsk, Russia, 454092
| | - A I Kryukov
- Research Institute of Clinical Otorhinolaryngology named after L.I. Sverzhevsky the Department of Health in Moscow, Moscow, Russia, 117152
| | - I D Dubinets
- Federal State Budgetary Educational Institution of Higher Education 'South Urals State Medical University' of the Ministry of Healthcare of the Russian Federation, Chelyabinsk, Russia, 454092
| | - M V Tyuhay
- Federal State Budget Educational Institution of Higher Education 'Chelyabinsk State University', Chelyabinsk, Russia, 454021
| | - D A Uchaev
- South Ural State University, Chelyabinsk, Russia, 454000
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Kunel'skaya NL, Ivoilov AY, Pakina VR, Yanovsky VV. [Exudative otitis media in the childhood]. Vestn Otorinolaringol 2015; 80:75-79. [PMID: 26003967 DOI: 10.17116/otorino201580175-79] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This review article was designed to systematize the literature data concerning etiology, pathogenesis, diagnostics and treatment of exudative otitis media (EOM) in the children. The review is focused on the prevailing current tendencies in the approaches to the problems of etiology, diagnostics, and treatment of EOM in the children as exemplified by the publications in the foreign and Russian-speaking literature. The special emphasis is laid on the description of the therapeutic and surgical methods for the management of EOM.
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Affiliation(s)
- N L Kunel'skaya
- L.I. Sverzhevsky Moscow Research and Practical Centre of Otorhinolaryngology, Moscow Health Department, Moscow, Russia, 117152
| | - A Yu Ivoilov
- L.I. Sverzhevsky Moscow Research and Practical Centre of Otorhinolaryngology, Moscow Health Department, Moscow, Russia, 117152
| | - V R Pakina
- L.I. Sverzhevsky Moscow Research and Practical Centre of Otorhinolaryngology, Moscow Health Department, Moscow, Russia, 117152
| | - V V Yanovsky
- L.I. Sverzhevsky Moscow Research and Practical Centre of Otorhinolaryngology, Moscow Health Department, Moscow, Russia, 117152
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Kariya S, Okano M, Higaki T, Makihara S, Haruna T, Eguchi M, Nishizaki K. Neutralizing antibody against granulocyte/macrophage colony-stimulating factor inhibits inflammatory response in experimental otitis media. Laryngoscope 2012; 123:1514-8. [PMID: 23172593 DOI: 10.1002/lary.23795] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Revised: 07/01/2012] [Accepted: 09/20/2012] [Indexed: 11/06/2022]
Abstract
OBJECTIVES/HYPOTHESIS Granulocyte/macrophage colony-stimulating factor is important in the pathogenesis of acute and chronic inflammatory disease. We hypothesized that granulocyte/macrophage colony-stimulating factor plays a pivotal role in middle ear inflammation and that neutralization of granulocyte/macrophage colony-stimulating factor would inhibit neutrophil migration into the middle ear and production of inflammatory mediators. STUDY DESIGN Animal experiment. METHODS We used transtympanic administration of lipopolysaccharide, a major component of gram-negative bacteria, into mice to induce an experimental otitis media. Control mice received injection of phosphate-buffered saline into the middle ear cavity. Mice were systemically treated with granulocyte/macrophage colony-stimulating factor neutralizing antibody or control immunoglobulin G via intraperitoneal injection 2 hours before transtympanic injection of lipopolysaccharide or phosphate-buffered saline. Middle ear effusions were collected. Concentrations of interleukin (IL)-1β, tumor necrosis factor (TNF)-α, keratinocyte chemoattractant, and macrophage inflammatory protein-2 in middle ear effusions were measured by enzyme-linked immunosorbent assay. Histologic examination of the middle ear was also performed. RESULTS Transtympanic injection of lipopolysaccharide upregulated levels of granulocyte/macrophage colony-stimulating factor, IL-1β, TNF-α, keratinocyte chemoattractant, and macrophage inflammatory protein-2 in the middle ear. Concentrations of cytokines and chemokines were significantly decreased in mice injected with granulocyte/macrophage colony-stimulating factor neutralizing antibody. Infiltration of inflammatory cells into the middle ear cavity induced by lipopolysaccharide was also significantly reduced by neutralization of granulocyte/macrophage colony-stimulating factor. CONCLUSIONS Systemic injection of granulocyte/macrophage colony-stimulating factor neutralizing antibody inhibits the middle ear inflammation induced by lipopolysaccharide in mice. Our findings suggest that granulocyte/macrophage colony-stimulating factor may offer a novel therapeutic target for the management of intractable otitis media.
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Affiliation(s)
- Shin Kariya
- Department of Otolaryngology-Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
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10
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Yu MS, Kim HC, Ahn JH. Management and Outcomes of Chronic Otitis Media in Patients Who Received Solid Organ Transplantation. Otolaryngol Head Neck Surg 2012; 146:567-71. [DOI: 10.1177/0194599811433276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objectives. Control of perioperative infection can increase the success rate of organ transplant. The incidence, clinical features, and optimal management of chronic otitis media (COM) in solid organ transplant recipients have not been adequately evaluated. We therefore assessed the incidence and clinical course of COM in solid-organ transplant recipients. Design. Case series with chart review. Setting. Tertiary referral center. Subjects and Methods. We reviewed the medical records of 3278 patients who underwent solid organ transplantations between February 1995 and December 2007 to identify those diagnosed with COM before and after transplant. We analyzed the long-term clinical course and management of COM in these patients. Results. Of 3278 solid organ transplant recipients, 65 (2.0%) were diagnosed with pretransplant COM with a perforated ear drum, including 31 liver, 28 renal, and 6 heart transplant recipients. The primary symptom was otorrhea, followed by hearing disturbance, otalgia, and tinnitus. Middle ear swab culture showed bacterial growth in 17 of the 40 patients (42.5%) with suppurative COM. Of these 40 patients, 14 underwent tympanomastoid surgery (operation group) and 26 were prescribed antibiotics (medication group). The remaining 25 patients, with dry perforated ear drums and well-pneumatized mastoids, were observed without treatment (observation group). After transplantation, the incidence of otorrhea was significantly lower in the operation group (11.1%) than in either the medication (26.9%) or observation (26.7%) group ( P = .040, .048, respectively). Conclusions. Precise diagnosis and proper surgical intervention for COM may reduce the rate of otorrhea and exacerbation of COM in solid organ transplant recipients.
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Affiliation(s)
- Myeong Sang Yu
- Department of Otolaryngology, Konkuk University School of Medicine, Chungju, Korea
| | - Ho Chan Kim
- Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Joong Ho Ahn
- Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
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Preciado D, Kuo E, Ashktorab S, Manes P, Rose M. Cigarette smoke activates NFκB-mediated Tnf-α release from mouse middle ear cells. Laryngoscope 2010; 120:2508-15. [PMID: 21108432 PMCID: PMC4107661 DOI: 10.1002/lary.21014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES/HYPOTHESIS : Cigarette smoke exposure is a significant risk factor in the development of otitis media. NF-κB is a transcription factor known to mediate cigarette smoke effects in multiple cell types. We hypothesized that stimulation of murine middle ear epithelial cells (MEEC) with cigarette smoke condensate (CSC) activates NF-κB resulting in upregulation of proinflammatory cytokines. STUDY DESIGN : In vitro model of cultured murine middle ear epithelial cells. METHODS : Time course CSC stimulation of MEEC was performed. Antibody microarrays were then utilized to simultaneously measure 40 inflammatory cytokines. Enzyme-linked immunosorbent assay (ELISA) and quantitative reverse transcriptase-polymerase chain reaction were performed to validate and further evaluate array results. Luciferase reporter assays were performed to evaluate NF-κB activation with CSC in MEEC. Chromatin immunoprecipitation (ChIP) assays were performed to determine whether CSC induces NF-κB interaction with the Tnf-α promoter. RESULTS : Multiple cytokines showed significant increases with CSC exposure. ELISA studies demonstrated that Tnf-α secretion increased the most. CSC stimulation likewise increased Tnf-α mRNA abundance and induced promoter activity 4.8-fold in a Tnf-α reporter plasmid. Reporter assays demonstrated 4.84-fold activation of NF-κB with CSC. ChIP assays demonstrated NF-κB binding to canonical κB sites in the Tnf-α promoter with CSC stimulation. CONCLUSIONS : CSC activates NF-κB in MEEC. Furthermore, this activation results in CSC induced Tnf-α promoter activation, gene expression, and levels in cell secretions. Laryngoscope, 120:2508-2515, 2010.
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Affiliation(s)
- Diego Preciado
- Center for Genetic Medicine Research, Georgetown University, Washington, DC 20010, USA.
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Factors affecting the extrusion rate of ventilation tubes. Clin Exp Otorhinolaryngol 2010; 3:70-5. [PMID: 20607075 PMCID: PMC2896736 DOI: 10.3342/ceo.2010.3.2.70] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Accepted: 03/10/2010] [Indexed: 11/14/2022] Open
Abstract
Objectives The objective of this study was to determine the various factors that affect the extrusion rate of ventilation tubes (VTs), including the nature of the middle ear effusion. Methods A retrospective chart review of 82 pediatric patients (177 ears) who received VT insertion surgery under general anesthesia was carried out to evaluate the relationship between various factors and the VT extrusion rate. The factors we analyzed included age, gender, the adenoid size, the amount and content of the middle ear effusion after myringotomy, bleeding events, associated adenoidectomy and the findings of the tympanic membrane status, the tympanometry and the audiometry of the air bone gap. Results The mean extrusion time was 254 days (range, 11 to 809 days). The patients with no history of previous VT insertion had a longer extrusion time (mean, 279 days) than did the patients who had undergone previous VT insertion (mean, 203 days). The patients with serous effusion had the shortest extrusion time (mean, 190 days) as compared to those patients with glue (273 days) and pus (295 days) effusions. Other factors had no statistical significant relationship with the extrusion time. Conclusion The mean VT extrusion time was 254 days. The VT extrusion time was significantly related to the characteristics of the middle ear effusion and a history of previous VT insertion. Thus, the nature of middle ear effusion can provide a clinical clue to predict the VT extrusion time.
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Abstract
Increasing evidence is emerging on genetic factors affecting host's response to infection in the middle ear. This review summarizes current knowledge on the field and on the contribution of nonspecific barriers, innate, and adaptive immunity. Better understanding of susceptibility to this very common disease will facilitate identification of high-risk individuals and optimization of prevention and treatment.
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The role of inflammatory mediators in the pathogenesis of otitis media and sequelae. Clin Exp Otorhinolaryngol 2008; 1:117-38. [PMID: 19434244 PMCID: PMC2671742 DOI: 10.3342/ceo.2008.1.3.117] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2008] [Accepted: 09/20/2008] [Indexed: 12/13/2022] Open
Abstract
This review deals with the characteristics of various inflammatory mediators identified in the middle ear during otitis media and in cholesteatoma. The role of each inflammatory mediator in the pathogenesis of otitis media and cholesteatoma has been discussed. Further, the relation of each inflammatory mediator to the pathophysiology of the middle and inner ear along with its mechanisms of pathological change has been described. The mechanisms of hearing loss including sensorineural hearing loss (SNHL) as a sequela of otitis media are also discussed. The passage of inflammatory mediators through the round window membrane into the scala tympani is indicated. In an experimental animal model, an application of cytokines and lipopolysaccharide (LPS), a bacterial toxin, on the round window membrane induced sensorineural hearing loss as identified through auditory brainstem response threshold shifts. An increase in permeability of the blood-labyrinth barrier (BLB) was observed following application of these inflammatory mediators and LPS. The leakage of the blood components into the lateral wall of the cochlea through an increase in BLB permeability appears to be related to the sensorineural hearing loss by hindering K+ recycling through the lateral wall disrupting the ion homeostasis of the endolymph. Further studies on the roles of various inflammatory mediators and bacterial toxins in inducing the sensorineumral hearing loss in otitis media should be pursued.
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Qing Y, Yi J, Xiao–yan W, Ke–fei Z. Inflammatory responses to Hydroxyapatite implants in middle ear in rats. J Otol 2008. [DOI: 10.1016/s1672-2930(08)50004-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Johnston BNA, Preciado DA, Ondrey FG, Daly KA. Presence of otitis media with effusion and its risk factors affect serum cytokine profile in children. Int J Pediatr Otorhinolaryngol 2008; 72:209-14. [PMID: 18055023 DOI: 10.1016/j.ijporl.2007.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Revised: 10/08/2007] [Accepted: 10/09/2007] [Indexed: 11/28/2022]
Abstract
UNLABELLED Otitis media with effusion (OME) is a condition that has significant impact on the quality of life of children. Although the etiology is multi-factorial, certain risk factors such as an allergic predisposition, daycare, and cigarette smoke exposure contribute to its pathogenesis. OBJECTIVE (1) To determine whether there is a tendency for children with chronic or recurrent OME (cases) to have higher serum levels of the T-helper 2 cell (Th-2) allergenic-type cytokines, interleukin-4 (IL-4), and IL-5, or the T-helper 1(Th-1) infectious-type cytokines, interferon-gamma (IFN-gamma), and tumor necrosis factor-alpha (TNF-alpha), compared to children without a history of recurrent OME (controls) and (2) to determine any possible correlations between the cytokine levels and risk factors associated with OME. METHODS We analyzed serum levels of these four cytokines by enzyme-linked immunosorbent assays of 19 cases and 17 controls. RESULTS Cases, independent of age, had increased levels of serum IL-5 compared to controls (p=0.014). While a significant difference in serum IL-4 levels did not exist between cases and controls, children exposed to cigarette smoke had significantly higher levels of serum IL-4 (p=0.003). While serum levels of IFN-gamma were statistically significantly higher in cases than controls with univariate analysis (p=0.011), when controlling for age and smoke exposure with multivariate analyses, the difference did not reach significance (p=0.086). CONCLUSION These results suggest that patients with chronic or recurrent OME and those exposed to cigarette smoke mount a Th-2 allergic-like response, as demonstrated by their serum cytokines.
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Affiliation(s)
- Brittany N A Johnston
- Department of Otolaryngology-Head and Neck Surgery, University of Minnesota, Minneapolis, MN, United States
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Tewfik TL, Mazer B. The links between allergy and otitis media with effusion. Curr Opin Otolaryngol Head Neck Surg 2008; 14:187-90. [PMID: 16728898 DOI: 10.1097/01.moo.0000193190.24849.f0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW In this review we will examine evidence indicating that allergic inflammation is present in middle ear effusion. We will also discuss several of the problems relating to the diagnosis of allergy and allergic sensitization, and why anti-allergy treatments have been unsuccessful. This will provide a rationale for future studies in the field linking allergic inflammation with otitis media with effusion. RECENT FINDINGS Recent findings in atopic children demonstrated higher levels of eosinophils, T lymphocytes, and interleukin-4+ and interleukin-5+ cells compared with nonatopic patients. T-helper 2 cells and cytokines were found not only in middle ear effusions in atopic children but also in specimens from adenoid tissue. This demonstrates a strong correlation between allergic reaction in the middle ear and the upper airway. SUMMARY In summary, as our knowledge of the allergic and nonallergic influences on inflammation broadens, the paradigms of treatment may be altered. The accumulating experimental and clinical data suggest that it may be wiser to screen every child with otitis media with effusion for allergic rhinitis and ultimately to manage those with allergic inflammation differently to nonatopic individuals with otitis media with effusion.
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Affiliation(s)
- Ted L Tewfik
- Department of Otolaryngology, McGill University, Montreal, Canada.
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Matkovic S, Vojvodic D, Baljosevic I. Comparison of cytokine levels in bilateral ear effusions in patients with otitis media secretoria. Otolaryngol Head Neck Surg 2007; 137:450-3. [PMID: 17765774 DOI: 10.1016/j.otohns.2007.04.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2006] [Revised: 03/19/2007] [Accepted: 04/18/2007] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The aim of this study was to clarify the site of primary pathology in otitis media with effusion. STUDY DESIGN AND SETTING The levels of the inflammatory mediators TNF-alpha, TNF-beta, IL-1beta, IL-8, IL-6, IL-4, IL-2, IL-5, IL-10, and IFN-gamma were measured in 54 pairs (108 samples) using specific enzyme-linked immunosorbent assays (ELISAs). RESULTS The levels of pro-inflammatory cytokines TNF-alpha, TNF-beta, IL-1beta, IL-8, anti-inflammatory cytokines IL-5, IL-4, IL-10, IL-6, and cytokines with immunoregulatory potential IFN-gamma, IL-2 were different between both ears of the same patient. CONCLUSION The results suggest that in one individual both ears have different immunological processes or rates and this has implications on using the opposite ear as a control in clinical trials. SIGNIFICANCE Profiles of interlink of examined cytokines within the samples of both ear effusions were significantly different. A significant bilateral difference was found in the levels of IFN-gamma.
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Matković S, Vojvodić D, Baljosevic I. Cytokine levels in groups of patients with different duration of chronic secretory otitis. Eur Arch Otorhinolaryngol 2007; 264:1283-7. [PMID: 17643258 DOI: 10.1007/s00405-007-0373-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2006] [Accepted: 06/08/2007] [Indexed: 11/28/2022]
Abstract
Chronic secretory otitis relates to the permanent presence of secretion in the middle ear for more than 3 months. The reason why applied therapy is often ineffective is that, for now, etiopathogenic molecular mechanisms responsible for the cause and the course of the secretory process in the mucus of the middle ear have not been precisely defined. Cytokines are the key mediators in middle ear inflammation with secretory otitis and regulating different inflammation states can add to the cause of the molecular processes that lead to hystopathological changes in mucus and submucus characteristically for the chronic state of secretory otitis. The aim of our work was to define the pro-inflammatory, immunoregulatory and allergy-associated cytokine levels in middle ear secretion samples of diseased children and to compare the defined values with the secretory process continuance in groups of patients who were diseased for more or less than 3 months. According to the results that have showed higher concentration of all ten examined cytokines in the secretion samples of the children who had secretory otitis for a longer time, it can be concluded that the disturbance expression regulation of the pro-inflammatory TNFalpha, TNFbeta, IL1beta, IFNgamma, IL-6 and IL-8, as well as immunoregulatory IL-2 and IL-10, and allergy associated cytokines IL-4 and IL-5 relating to the hyper production can add to the conversion of the inflammatory process to the chronic state, which has been maintained for longer than 3 months.
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Weber R, Neto CDP, Miziara ID, Filho BCA. HAART impact on prevalence of chronic otitis media in Brazilian HIV-infected children. Braz J Otorhinolaryngol 2007; 72:509-14. [PMID: 17143430 PMCID: PMC9445638 DOI: 10.1016/s1808-8694(15)30997-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2005] [Accepted: 06/05/2006] [Indexed: 11/30/2022] Open
Abstract
The advent of new antiretroviral drugs such as protease inhibitors has generated sensible changes in morbity and mortality in HIV-infected patients. Objectives To evaluate the impact of Highly Active Antiretroviral Therapy (HAART) on the prevalence of chronic otitis media in HIV-infected pediatric population. Methods We analyzed medical charts of 471 children aged zero to 12 years and 11 months with HIV infection from an Ambulatory of ENT and AIDS. Children were divided according to the age: 0 to 5 years and 11 months and 6 to 12 years and 11 months and classified as having chronic otitis media based on history, physical examination, audiologic and tympanometric data. Prevalence of chronic otitis media, as well as CD4+ lymphocyte count were compared between groups in use of HAART and the group without HAART. Results Out of 459 children, 65 (14.2%) had chronic otitis media. We observed that in children aged 0 to 5 years and 11 months who were taking HAART there was significant lower prevalence of chronic otitis media (p = 0.02). The use of HAART was associated to higher mean CD4+ lymphocyte count (p < 0.001). Conclusion The use of HAART was associated to reduction in prevalence of chronic otitis media in HIV infected children, probably due to increase in mean CD4+ lymphocyte count.
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Affiliation(s)
- Raimar Weber
- MD, Otorhinolaryngologist Resident at the Department of Otorhinolaryngology and Ophthalmology of the Medical School of the University of São Paulo
| | - Carlos Diógenes Pinheiro Neto
- MD, Otorhinolaryngologist Resident at the Department of Otorhinolaryngology and Ophthalmology of the Medical School of the University of São Paulo
| | - Ivan Dieb Miziara
- Assistant Professor - Department of Otorhinolaryngology and Ophthalmology of the Medical School of the University of São Paulo
- Mailing address: Ivan Dieb Miziara – Rua Cristiano Viana 450/121 São Paulo SP 05411-000.
| | - Bernardo Cunha Araújo Filho
- MD, Otorhinolaryngologist, Postgraduate Student - Department of Otorhinolaryngology and Ophthalmology of the Medical School of the University of São Paulo. Study carried out at the Department of Otorhinolaryngology and Ophthalmology of the Medical School of the University of São Paulo
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Miziara ID, Weber R, Araújo Filho BC, Pinheiro Neto CD. Otitis media in Brazilian human immunodeficiency virus infected children undergoing antiretroviral therapy. The Journal of Laryngology & Otology 2007; 121:1048-54. [PMID: 17319998 DOI: 10.1017/s0022215107006093] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractObjective:To assess changes in the prevalence of otitis media, associated with the use of highly active antiretroviral therapy, in Brazilian human immunodeficiency virus (HIV) infected children.Setting:Division of otorhinolaryngology, Hospital das Clínicas, Sao Paulo University Medical School, Brazil.Patients:A cohort of 459 HIV-infected children aged below 13 years.Main outcome measures:The prevalence of otitis media and the serum cluster of differentiation four glycoprotein T lymphocyte count were compared for children receiving highly active antiretroviral therapy (with protease inhibitors) and those receiving standard antiretroviral therapy (without protease inhibitors).Results:Otitis media was present in 33.1 per cent of the children. Children aged from zero years to five years 11 months receiving highly active antiretroviral therapy had a higher prevalence of acute otitis media (p=0.02) and a lower prevalence of chronic otitis media (p=0.02). Children who were receiving highly active antiretroviral therapy had a mean serum cluster of differentiation four glycoprotein T lymphocyte count greater than that of those who were receiving standard antiretroviral therapy (p<0.001).Conclusions:The use of highly active antiretroviral therapy in Brazilian HIV-infected children was associated with a lower prevalence of chronic otitis media.
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Affiliation(s)
- I D Miziara
- Division of Clinical Otorhinolaryngology, Department of Otorhinolaryngology and Ophthalmology, Medical School, University of Sao Paulo, Brazil.
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Weber R, Pinheiro Neto CD, Miziara ID, Araújo Filho BC. Impacto da Haart na prevalência de otite média crônica em crianças brasileiras infectadas pelo HIV. ACTA ACUST UNITED AC 2006. [DOI: 10.1590/s0034-72992006000400012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
O advento de novas drogas anti-retrovirais como os inibidores de protease provocou mudanças sensíveis na morbidade e mortalidade de pacientes infectados pelo HIV. OBJETIVOS: Avaliar o impacto das novas drogas anti-retrovirais (Highly Active Anti-retroviral Therapy - HAART) na prevalência de otite média crônica em população pediátrica infectada pelo HIV. MÉTODOS: Analisamos os prontuários de 471 crianças com idade entre zero e 12 anos e 11 meses portadoras de HIV atendidas no ambulatório de AIDS de Clínica Otorrinolaringológica do HCFMUSP. As crianças foram divididas em dois grupos, de acordo com a faixa etária: 0 a 5 anos e 11 meses e 6 a 12 anos e 11 meses, e classificadas como portadoras de otite média crônica, baseadas em achados de anamnese, otoscopia, audiometria e imitanciometria. As prevalências de otite média crônica apresentadas e as contagens de linfócitos T CD4+ foram comparadas entre as crianças em uso ou não de HAART. RESULTADOS: Das 459 crianças atendidas, 65 (14,2%) apresentavam otite média crônica. Observamos, nas crianças de 0 a 5 anos e 11 meses que o uso de HAART esteve associado a significante menor prevalência de otite média crônica (p = 0,02), e maior contagem de linfócitos T CD4+ (p < 0,001). CONCLUSÃO: O uso de HAART esteve associado à menor prevalência da forma crônica de otite média entre crianças menores de 6 anos infectadas pelo HIV, provavelmente como conseqüência do aumento promovido na contagem de linfócitos T CD4+.
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