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  1. Article ; Online: Mouse models for human otitis media.

    Trune, Dennis R / Zheng, Qing Yin

    Brain research

    2009  Volume 1277, Page(s) 90–103

    Abstract: ... numbers of mouse models are helping to uncover the potential genetic bases for human OM. Furthermore ... status, genetic predisposition, and environment. Recent progress in mouse model development is helping ... Otitis media (OM) remains the most common childhood disease and its annual costs exceed $5 billion ...

    Abstract Otitis media (OM) remains the most common childhood disease and its annual costs exceed $5 billion. Its potential for permanent hearing impairment also emphasizes the need to better understand and manage this disease. The pathogenesis of OM is multifactorial and includes infectious pathogens, anatomy, immunologic status, genetic predisposition, and environment. Recent progress in mouse model development is helping to elucidate the respective roles of these factors and to significantly contribute toward efforts of OM prevention and control. Genetic predisposition is recognized as an important factor in OM and increasing numbers of mouse models are helping to uncover the potential genetic bases for human OM. Furthermore, the completion of the mouse genome sequence has offered a powerful set of tools for investigating gene function and is generating a rich resource of mouse mutants for studying the genetic factors underlying OM.
    MeSH term(s) Animals ; Disease Models, Animal ; Humans ; Immunotherapy, Active ; Mice ; Otitis Media/genetics ; Otitis Media/immunology ; Otitis Media/microbiology ; Otitis Media/therapy ; Toll-Like Receptors/metabolism
    Chemical Substances Toll-Like Receptors
    Language English
    Publishing date 2009-03-06
    Publishing country Netherlands
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Review
    ZDB-ID 1200-2
    ISSN 1872-6240 ; 0006-8993
    ISSN (online) 1872-6240
    ISSN 0006-8993
    DOI 10.1016/j.brainres.2009.02.047
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Resolution of otitis media in a humanized mouse model.

    Son, Ye Lin / Pak, Kwang / Muradagha, Nada / Heo, Kyung Wook / Leichtle, Anke / Kurabi, Arwa

    Frontiers in genetics

    2022  Volume 13, Page(s) 958540

    Abstract: Otitis media (OM) is one of the largest public health problems of children and has devastating ... to study the human immune system in an animal model. Here we describe the first use of humanized mice ... impacts in developing countries. The substantial medical and human costs involved have led to research ...

    Abstract Otitis media (OM) is one of the largest public health problems of children and has devastating impacts in developing countries. The substantial medical and human costs involved have led to research to understand the disease and improve treatment. Animal models of OM have yielded critical information about the immune, inflammatory and genetic mechanisms of OM. However, it is important to link animal studies to human immune and inflammatory responses. In recent years, "humanized" mice have become a valuable tool to study the human immune system in an animal model. Here we describe the first use of humanized mice to study OM. We demonstrate that humanized mice with a sufficient degree of engraftment recapitulate a normal middle ear (ME) inflammatory response to bacterial infection, including the recruitment of human immune cells, and exhibit normal recovery. Moreover, these animals exhibit regulated expression of human-specific immune and inflammatory genes in the ME. In contrast, mice with insufficient engraftment fail to resolve OM. This model has many potential uses in OM research, including using hematopoietic stem cells from patients with differing degrees of OM susceptibility, to understand the role of human immune responses in proneness to this common childhood disease.
    Language English
    Publishing date 2022-11-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2606823-0
    ISSN 1664-8021
    ISSN 1664-8021
    DOI 10.3389/fgene.2022.958540
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: An infant mouse model of influenza-driven nontypeable

    Landwehr, Katherine R / Granland, Caitlyn M / Martinovich, Kelly M / Scott, Naomi M / Seppanen, Elke J / Berry, Luke / Strickland, Deborah / Fulurija, Alma / Richmond, Peter C / Kirkham, Lea-Ann S

    Infection and immunity

    2024  Volume 92, Issue 5, Page(s) e0045323

    Abstract: ... ...

    Abstract Nontypeable
    MeSH term(s) Animals ; Otitis Media/microbiology ; Haemophilus influenzae/growth & development ; Haemophilus influenzae/pathogenicity ; Haemophilus influenzae/physiology ; Haemophilus Infections/microbiology ; Disease Models, Animal ; Mice ; Influenza A virus/pathogenicity ; Influenza A virus/growth & development ; Mice, Inbred BALB C ; Orthomyxoviridae Infections/virology ; Orthomyxoviridae Infections/complications ; Humans ; Animals, Newborn
    Language English
    Publishing date 2024-04-11
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 218698-6
    ISSN 1098-5522 ; 0019-9567
    ISSN (online) 1098-5522
    ISSN 0019-9567
    DOI 10.1128/iai.00453-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The A2ml1-Knockout mouse as an animal model for non-syndromic otitis media.

    Elling, Christina L / Gomez, Helen Z / Lee, Nam K / Hirsch, Scott D / Santos-Cortez, Regie Lyn P

    International journal of pediatric otorhinolaryngology

    2024  Volume 181, Page(s) 111980

    Abstract: ... mouse models for OM rely on inducing acute infection through inoculation of the middle ear, e.g ... with the human otopathogen non-typeable Haemophilus influenzae (NTHi), and with very few genetic models ... Background: Inflammation and infection of the middle ear, known as otitis media (OM), is a leading ...

    Abstract Background: Inflammation and infection of the middle ear, known as otitis media (OM), is a leading cause of hearing loss and the most frequently diagnosed disease in children worldwide. Traditionally, mouse models for OM rely on inducing acute infection through inoculation of the middle ear, e.g. with the human otopathogen non-typeable Haemophilus influenzae (NTHi), and with very few genetic models with spontaneous or chronic OM. A2ML1 variants, including loss-of-function variants, were associated with susceptibility to OM in humans, but no animal model has been reported for A2ml1-related OM. Here, we report our middle ear findings in a mouse line with a CRISPR-induced knockout (KO) of A2ml1.
    Methods: Mice were X-rayed prior to harvest to determine if there are craniofacial or skeletal abnormalities. Tissue from mouse middle ears, as well as other upper respiratory mucosal tissues, were harvested. The harvested middle ear bullae were examined under microscope and submitted for histologic preparation to study phenotypic indications of OM. RNA samples isolated from middle ear tissue were assayed for expression of genes correlated with A2ML1 expression in humans.
    Results: Data from a total of 119 mice (35 wildtype, 40 heterozygous, 44 homozygous) are presented here, with each analyses being performed on subsets of these mice. There were no significant craniofacial differences by genotype (n = 22). Findings in mice with the A2ml1-KO indicated an increased incidence of OM (n=29; odds ratio = 11; CI: 1.1, 573.6; Fisher exact two-sided p = 0.02) with tympanic membrane perforations or thickening, as well as cases of middle ear effusion, inflammatory cells, or fluid from histologic sections. Dsp was upregulated in the middle ear tissues of homozygous mice (Wilcoxon test p = 0.001).
    Conclusion: Thus far, our results in this A2ml1-KO mouse line indicate spontaneous occurrence of OM and dysregulation of Dsp in the middle ear as a potential disease mechanism for A2ml1-related OM.
    Language English
    Publishing date 2024-05-10
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 754501-0
    ISSN 1872-8464 ; 0165-5876
    ISSN (online) 1872-8464
    ISSN 0165-5876
    DOI 10.1016/j.ijporl.2024.111980
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Mouse models as a tool to unravel the genetic basis for human otitis media.

    Zheng, Qing Yin / Hardisty-Hughes, Rachel / Brown, Steve D M

    Brain research

    2006  Volume 1091, Issue 1, Page(s) 9–15

    Abstract: ... mouse models to uncover the genetic basis for human OM. ... underlying OM. We review the literature and discuss recent progresses in developing mouse models and using ... The pathogenesis of otitis media (OM) is multifactorial and includes infection, anatomical ...

    Abstract The pathogenesis of otitis media (OM) is multifactorial and includes infection, anatomical factors, immunologic status, genetic predisposition, and environmental factors. OM remains the most common cause of hearing impairment in childhood. Genetic predisposition is increasingly recognized as an important factor. The completion of the mouse genome sequence has offered a powerful basket of tools for investigating gene function and can expect to generate a rich resource of mouse mutants for the elucidation of genetic factors underlying OM. We review the literature and discuss recent progresses in developing mouse models and using mouse models to uncover the genetic basis for human OM.
    MeSH term(s) Animals ; Disease Models, Animal ; Humans ; Otitis Media/etiology ; Otitis Media/genetics
    Language English
    Publishing date 2006-08-18
    Publishing country Netherlands
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1200-2
    ISSN 1872-6240 ; 0006-8993
    ISSN (online) 1872-6240
    ISSN 0006-8993
    DOI 10.1016/j.brainres.2006.01.046
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Pathological features in the LmnaDhe/+ mutant mouse provide a novel model of human otitis media and laminopathies.

    Zhang, Yan / Yu, Heping / Xu, Min / Han, Fengchan / Tian, Cong / Kim, Suejin / Fredman, Elisha / Zhang, Jin / Benedict-Alderfer, Cindy / Zheng, Qing Yin

    The American journal of pathology

    2012  Volume 181, Issue 3, Page(s) 761–774

    Abstract: ... mouse provides a novel model of human OM and laminopathy. ... Genetic predisposition is recognized as an important pathogenetic factor in otitis media (OM) and ... exhibit early-onset, profound hearing deficits and other pathological features mimicking human laminopathy ...

    Abstract Genetic predisposition is recognized as an important pathogenetic factor in otitis media (OM) and associated diseases. Mutant Lmna mice heterozygous for the disheveled hair and ears allele (Lmna(Dhe/+)) exhibit early-onset, profound hearing deficits and other pathological features mimicking human laminopathy associated with the LMNA mutation. We assessed the effects of the Lmna(Dhe/+) mutation on development of OM and pathological abnormalities characteristic of laminopathy. Malformation and abnormal positioning of the eustachian tube, accompanied by OM, were observed in all of the Lmna(Dhe/+) mice (100% penetrance) as early as postnatal day P12. Scanning electronic microscopy revealed ultrastructural damage to the cilia in middle ears that exhibited OM. Hearing assessment revealed significant hearing loss, paralleling that in human OM. Expression of NF-κB, TNF-α, and TGF-β, which correlated with inflammation and/or bony development, was up-regulated in the ears or in the peritoneal macrophages of Lmna(Dhe/+) mice. Rugous, disintegrative, and enlarged nuclear morphology of peritoneal macrophages and hyperphosphatemia were found in Lmna(Dhe/+) mutant mice. Taken together, these features resemble the pathology of human laminopathies, possibly revealing some profound pathology, beyond OM, associated with the mutation. The Lmna(Dhe/+) mutant mouse provides a novel model of human OM and laminopathy.
    MeSH term(s) Acoustic Impedance Tests ; Animals ; Calcium/blood ; Cell Count ; Cell Movement ; Cilia/pathology ; Cilia/ultrastructure ; Cytokines/genetics ; Cytokines/metabolism ; Disease Models, Animal ; Ear, Middle/abnormalities ; Ear, Middle/pathology ; Ear, Middle/physiopathology ; Epithelial Cells/metabolism ; Epithelial Cells/pathology ; Epithelial Cells/ultrastructure ; Eustachian Tube/abnormalities ; Eustachian Tube/pathology ; Evoked Potentials, Auditory, Brain Stem/physiology ; Gene Expression Regulation ; Humans ; Inflammation Mediators/metabolism ; Ions/blood ; Lamin Type A/metabolism ; Macrophages, Peritoneal/metabolism ; Macrophages, Peritoneal/pathology ; Mice ; Mice, Mutant Strains ; Otitis Media/blood ; Otitis Media/pathology ; Otitis Media/physiopathology ; Otoacoustic Emissions, Spontaneous/physiology ; Phosphorus/blood ; Time Factors ; Transforming Growth Factor beta/genetics ; Transforming Growth Factor beta/metabolism ; Tumor Necrosis Factor-alpha/genetics ; Tumor Necrosis Factor-alpha/metabolism
    Chemical Substances Cytokines ; Inflammation Mediators ; Ions ; Lamin Type A ; Lmna protein, mouse ; Transforming Growth Factor beta ; Tumor Necrosis Factor-alpha ; Phosphorus (27YLU75U4W) ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2012-07-20
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2943-9
    ISSN 1525-2191 ; 0002-9440
    ISSN (online) 1525-2191
    ISSN 0002-9440
    DOI 10.1016/j.ajpath.2012.05.031
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Auditory function in the Tc1 mouse model of down syndrome suggests a limited region of human chromosome 21 involved in otitis media.

    Kuhn, Stephanie / Ingham, Neil / Pearson, Selina / Gribble, Susan M / Clayton, Stephen / Steel, Karen P / Marcotti, Walter

    PloS one

    2012  Volume 7, Issue 2, Page(s) e31433

    Abstract: ... problems in humans, including frequent otitis media. The Tc1 mouse carries a significant part ... to that observed in the Ts65Dn model of Down syndrome which shows otitis media. Genes that are trisomic in Ts65Dn ... of human chromosome 21 (Hsa21) in addition to the full set of mouse chromosomes and shares many phenotypes observed ...

    Abstract Down syndrome is one of the most common congenital disorders leading to a wide range of health problems in humans, including frequent otitis media. The Tc1 mouse carries a significant part of human chromosome 21 (Hsa21) in addition to the full set of mouse chromosomes and shares many phenotypes observed in humans affected by Down syndrome with trisomy of chromosome 21. However, it is unknown whether Tc1 mice exhibit a hearing phenotype and might thus represent a good model for understanding the hearing loss that is common in Down syndrome. In this study we carried out a structural and functional assessment of hearing in Tc1 mice. Auditory brainstem response (ABR) measurements in Tc1 mice showed normal thresholds compared to littermate controls and ABR waveform latencies and amplitudes were equivalent to controls. The gross anatomy of the middle and inner ears was also similar between Tc1 and control mice. The physiological properties of cochlear sensory receptors (inner and outer hair cells: IHCs and OHCs) were investigated using single-cell patch clamp recordings from the acutely dissected cochleae. Adult Tc1 IHCs exhibited normal resting membrane potentials and expressed all K(+) currents characteristic of control hair cells. However, the size of the large conductance (BK) Ca(2+) activated K(+) current (I(K,f)), which enables rapid voltage responses essential for accurate sound encoding, was increased in Tc1 IHCs. All physiological properties investigated in OHCs were indistinguishable between the two genotypes. The normal functional hearing and the gross structural anatomy of the middle and inner ears in the Tc1 mouse contrast to that observed in the Ts65Dn model of Down syndrome which shows otitis media. Genes that are trisomic in Ts65Dn but disomic in Tc1 may predispose to otitis media when an additional copy is active.
    MeSH term(s) Animals ; Chromosomes, Human, Pair 21/physiology ; Cochlea ; Disease Models, Animal ; Down Syndrome/complications ; Down Syndrome/genetics ; Down Syndrome/physiopathology ; Evoked Potentials, Auditory, Brain Stem ; Hair Cells, Auditory ; Hearing ; Humans ; Mice ; Mice, Transgenic ; Neoplasm Proteins ; Otitis Media/etiology
    Chemical Substances Neoplasm Proteins ; Tcim protein, mouse
    Language English
    Publishing date 2012-02-14
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0031433
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Auditory function in the Tc1 mouse model of down syndrome suggests a limited region of human chromosome 21 involved in otitis media.

    Stephanie Kuhn / Neil Ingham / Selina Pearson / Susan M Gribble / Stephen Clayton / Karen P Steel / Walter Marcotti

    PLoS ONE, Vol 7, Iss 2, p e

    2012  Volume 31433

    Abstract: ... problems in humans, including frequent otitis media. The Tc1 mouse carries a significant part ... to that observed in the Ts65Dn model of Down syndrome which shows otitis media. Genes that are trisomic in Ts65Dn ... of human chromosome 21 (Hsa21) in addition to the full set of mouse chromosomes and shares many phenotypes observed ...

    Abstract Down syndrome is one of the most common congenital disorders leading to a wide range of health problems in humans, including frequent otitis media. The Tc1 mouse carries a significant part of human chromosome 21 (Hsa21) in addition to the full set of mouse chromosomes and shares many phenotypes observed in humans affected by Down syndrome with trisomy of chromosome 21. However, it is unknown whether Tc1 mice exhibit a hearing phenotype and might thus represent a good model for understanding the hearing loss that is common in Down syndrome. In this study we carried out a structural and functional assessment of hearing in Tc1 mice. Auditory brainstem response (ABR) measurements in Tc1 mice showed normal thresholds compared to littermate controls and ABR waveform latencies and amplitudes were equivalent to controls. The gross anatomy of the middle and inner ears was also similar between Tc1 and control mice. The physiological properties of cochlear sensory receptors (inner and outer hair cells: IHCs and OHCs) were investigated using single-cell patch clamp recordings from the acutely dissected cochleae. Adult Tc1 IHCs exhibited normal resting membrane potentials and expressed all K(+) currents characteristic of control hair cells. However, the size of the large conductance (BK) Ca(2+) activated K(+) current (I(K,f)), which enables rapid voltage responses essential for accurate sound encoding, was increased in Tc1 IHCs. All physiological properties investigated in OHCs were indistinguishable between the two genotypes. The normal functional hearing and the gross structural anatomy of the middle and inner ears in the Tc1 mouse contrast to that observed in the Ts65Dn model of Down syndrome which shows otitis media. Genes that are trisomic in Ts65Dn but disomic in Tc1 may predispose to otitis media when an additional copy is active.
    Keywords Medicine ; R ; Science ; Q
    Subject code 572
    Language English
    Publishing date 2012-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article: The interconnected relationships between middle ear bulla size, cavitation defects, and chronic otitis media revealed in a syndromic mouse model.

    Fons, Juan M / Milmoe, Natalie J / Dack, Michael R G / Joshi, Leena / Thompson, Hannah / Tucker, Abigail S

    Frontiers in genetics

    2022  Volume 13, Page(s) 933416

    Abstract: High incidence of chronic otitis media is associated with human craniofacial syndromes, suggesting ... in the ear leading to both sensorineural and conductive hearing loss, including otitis media. 40% of BOR ...

    Abstract High incidence of chronic otitis media is associated with human craniofacial syndromes, suggesting that defects in the formation of the middle ear and associated structures can have a knock-on effect on the susceptibility to middle ear inflammation. Patients with branchio-oto-renal (BOR) syndrome have several defects in the ear leading to both sensorineural and conductive hearing loss, including otitis media. 40% of BOR syndrome cases are due to
    Language English
    Publishing date 2022-10-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2606823-0
    ISSN 1664-8021
    ISSN 1664-8021
    DOI 10.3389/fgene.2022.933416
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Treatment with a neutrophil elastase inhibitor and ofloxacin reduces P. aeruginosa burden in a mouse model of chronic suppurative otitis media.

    Khomtchouk, K M / Joseph, L I / Khomtchouk, B B / Kouhi, A / Massa, S / Xia, A / Koliesnik, I / Pletzer, D / Bollyky, P L / Santa Maria, P L

    NPJ biofilms and microbiomes

    2021  Volume 7, Issue 1, Page(s) 31

    Abstract: ... post-infection in a mouse model of CSOM and in human subjects with the disease. Using multiparameter ... Chronic suppurative otitis media (CSOM) is a widespread, debilitating problem with poorly ... of mature neutrophils, as the most informative factor of host response driving disease in the CSOM mouse ...

    Abstract Chronic suppurative otitis media (CSOM) is a widespread, debilitating problem with poorly understood immunology. Here, we assess the host response to middle ear infection over the course of a month post-infection in a mouse model of CSOM and in human subjects with the disease. Using multiparameter flow cytometry and a binomial generalized linear machine learning model, we identified Ly6G, a surface marker of mature neutrophils, as the most informative factor of host response driving disease in the CSOM mouse model. Consistent with this, neutrophils were the most abundant cell type in infected mice and Ly6G expression tracked with the course of infection. Moreover, neutrophil-specific immunomodulatory treatment using the neutrophil elastase inhibitor GW 311616A significantly reduces bacterial burden relative to ofloxacin-only treated animals in this model. The levels of dsDNA in middle ear effusion samples are elevated in both humans and mice with CSOM and decreased during treatment, suggesting that dsDNA may serve as a molecular biomarker of treatment response. Together these data strongly implicate neutrophils in the ineffective immune response to P. aeruginosa infection in CSOM and suggest that immunomodulatory strategies may benefit drug-tolerant infections for chronic biofilm-mediated disease.
    MeSH term(s) Animals ; Antigens, Ly/metabolism ; Disease Models, Animal ; Drug Synergism ; Female ; Flow Cytometry ; Humans ; Machine Learning ; Male ; Mice ; Neutrophils/immunology ; Ofloxacin/administration & dosage ; Ofloxacin/pharmacology ; Otitis Media, Suppurative/drug therapy ; Otitis Media, Suppurative/immunology ; Otitis Media, Suppurative/microbiology ; Piperidines/administration & dosage ; Piperidines/pharmacology ; Proteinase Inhibitory Proteins, Secretory/administration & dosage ; Proteinase Inhibitory Proteins, Secretory/pharmacology ; Pseudomonas Infections/complications ; Pseudomonas Infections/drug therapy ; Pseudomonas Infections/immunology ; Pseudomonas aeruginosa/drug effects
    Chemical Substances Antigens, Ly ; GW 311616 ; Ly6G antigen, mouse ; Piperidines ; Proteinase Inhibitory Proteins, Secretory ; Ofloxacin (A4P49JAZ9H)
    Language English
    Publishing date 2021-04-06
    Publishing country United States
    Document type Comparative Study ; Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2817021-0
    ISSN 2055-5008 ; 2055-5008
    ISSN (online) 2055-5008
    ISSN 2055-5008
    DOI 10.1038/s41522-021-00200-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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