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Jeon Y, Chow SH, Stuart I, Weir A, Yeung AT, Hale C, Sridhar S, Dougan G, Vince JE, Naderer T. FBXO11 governs macrophage cell death and inflammation in response to bacterial toxins. Life Sci Alliance 2023; 6:e202201735. [PMID: 36977592 PMCID: PMC10053445 DOI: 10.26508/lsa.202201735] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 03/19/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Staphylococcus aureus causes severe infections such as pneumonia and sepsis depending on the pore-forming toxin Panton-Valentine leukocidin (PVL). PVL kills and induces inflammation in macrophages and other myeloid cells by interacting with the human cell surface receptor, complement 5a receptor 1 (C5aR1). C5aR1 expression is tighly regulated and may thus modulate PVL activity, although the mechanisms involved remain incompletely understood. Here, we used a genome-wide CRISPR/Cas9 screen and identified F-box protein 11 (FBXO11), an E3 ubiquitin ligase complex member, to promote PVL toxicity. Genetic deletion of FBXO11 reduced the expression of C5aR1 at the mRNA level, whereas ectopic expression of C5aR1 in FBXO11-/- macrophages, or priming with LPS, restored C5aR1 expression and thereby PVL toxicity. In addition to promoting PVL-mediated killing, FBXO11 dampens secretion of IL-1β after NLRP3 activation in response to bacterial toxins by reducing mRNA levels in a BCL-6-dependent and BCL-6-independent manner. Overall, these findings highlight that FBXO11 regulates C5aR1 and IL-1β expression and controls macrophage cell death and inflammation following PVL exposure.
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Affiliation(s)
- Yusun Jeon
- Department of Biochemistry & Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - Seong H Chow
- Department of Biochemistry & Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - Isabella Stuart
- Department of Biochemistry & Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - Ashley Weir
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- The Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Amy Ty Yeung
- The Wellcome Sanger Institute, Wellcome Trust Genome Campus, Cambridge, UK
| | - Christine Hale
- The Wellcome Sanger Institute, Wellcome Trust Genome Campus, Cambridge, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Sushmita Sridhar
- The Wellcome Sanger Institute, Wellcome Trust Genome Campus, Cambridge, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Gordon Dougan
- The Wellcome Sanger Institute, Wellcome Trust Genome Campus, Cambridge, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - James E Vince
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- The Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Thomas Naderer
- Department of Biochemistry & Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Australia
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Guo T, Han X, He J, Feng J, Jing J, Janečková E, Lei J, Ho TV, Xu J, Chai Y. KDM6B interacts with TFDP1 to activate P53 signalling in regulating mouse palatogenesis. eLife 2022; 11:74595. [PMID: 35212626 PMCID: PMC9007587 DOI: 10.7554/elife.74595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
Epigenetic regulation plays extensive roles in diseases and development. Disruption of epigenetic regulation not only increases the risk of cancer, but can also cause various developmental defects. However, the question of how epigenetic changes lead to tissue-specific responses during neural crest fate determination and differentiation remains understudied. Using palatogenesis as a model, we reveal the functional significance of Kdm6b, an H3K27me3 demethylase, in regulating mouse embryonic development. Our study shows that Kdm6b plays an essential role in cranial neural crest development, and loss of Kdm6b disturbs P53 pathway-mediated activity, leading to complete cleft palate along with cell proliferation and differentiation defects in mice. Furthermore, activity of H3K27me3 on the promoter of Trp53 is antagonistically controlled by Kdm6b, and Ezh2 in cranial neural crest cells. More importantly, without Kdm6b, the transcription factor TFDP1, which normally binds to the promoter of Trp53, cannot activate Trp53 expression in palatal mesenchymal cells. Furthermore, the function of Kdm6b in activating Trp53 in these cells cannot be compensated for by the closely related histone demethylase Kdm6a. Collectively, our results highlight the important role of the epigenetic regulator KDM6B and how it specifically interacts with TFDP1 to achieve its functional specificity in regulating Trp53 expression, and further provide mechanistic insights into the epigenetic regulatory network during organogenesis.
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Affiliation(s)
- Tingwei Guo
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Xia Han
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Jinzhi He
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Jifan Feng
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Junjun Jing
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Eva Janečková
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Jie Lei
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Thach-Vu Ho
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Jian Xu
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
| | - Yang Chai
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, United States
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Long non-coding RNA NNT-AS1 regulates proliferation, apoptosis, inflammation and airway remodeling of chronic obstructive pulmonary disease via targeting miR-582-5p/FBXO11 axis. Biomed Pharmacother 2020; 129:110326. [PMID: 32768929 DOI: 10.1016/j.biopha.2020.110326] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 05/21/2020] [Accepted: 05/23/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a kind of chronic lung disease that mainly induced by smoking-caused inflammation. Long non-coding RNAs (lncRNAs) have been reported to play a part in the course of pulmonary diseases. Here, we studied the role of lncRNA NNT-AS1 in the development of COPD. MATERIALS qRT-PCR analysis and ELISA assay were applied to evaluate the expression of genes and inflammatory cytokines, respectively. CCK8 and EdU assays were utilized to assess proliferation, while flow cytometry assay was conducted to evaluate apoptosis. Luciferase reporter, RNA pull down and RIP assays were combined to explore relationships between genes. RESULTS NNT-AS1 was observed to be up-regulated in cigarette smoke extract (CSE)-treated 16HBE cells. Knockdown of NNT-AS1 abolished CSE-caused suppressive effects on cell proliferation, apoptosis, inflammation and airway remodeling. Mechanistically, NNT-AS1 up-regulated FBXO11 expression via sponging miR-582-5p. Moreover, miR-582-5p inhibitor or FBXO11 overexpression counteracted NNT-AS1 silence-elicited effects on proliferation, apoptosis, inflammation and airway remodeling. CONCLUSION Our data revealed that NNT-AS1 played a promoting role in smoking-induced COPD via modulating miR-582-5p/FBXO11 signaling, suggesting a novel potential target for COPD treatment.
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Hilliard SA, Li Y, Dixon A, El-Dahr SS. Mdm4 controls ureteric bud branching via regulation of p53 activity. Mech Dev 2020; 163:103616. [PMID: 32464196 DOI: 10.1016/j.mod.2020.103616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 05/19/2020] [Accepted: 05/21/2020] [Indexed: 02/07/2023]
Abstract
The antagonism between Mdm2 and its close homolog Mdm4 (also known as MdmX) and p53 is vital for embryogenesis and organogenesis. Previously, we demonstrated that targeted disruption of Mdm2 in the Hoxb7+ ureteric bud (Ub) lineage, which gives rise to the renal collecting system, causes renal hypodysplasia culminating in perinatal lethality. In this study, we examine the unique role of Mdm4 in establishing the collecting duct system of the murine kidney. Hoxb7Cre driven loss of Mdm4 in the Ub lineage (UbMdm4-/-) disrupts branching morphogenesis and triggers UB cell apoptosis. UbMdm4-/- kidneys exhibit abnormally dilated Ub tips while the medulla is hypoplastic. These structural alterations result in secondary depletion of nephron progenitors and nascent nephrons. As a result, newborn UbMdm4-/- mice have hypo-dysplastic kidneys. Transcriptional profiling revealed downregulation of the Ret-tyrosine kinase pathway components, Gdnf, Wnt11, Sox8, Etv4 and Cxcr4 in the UbMdm4-/- mice relative to controls. Moreover, the expression levels of the canonical Wnt signaling members Axin2 and Wnt9b are downregulated. Mdm4 deletion upregulated p53 activity and p53-target gene expression including Cdkn1a (p21), Gdf15, Ccng1, PERP, and Fas. Germline loss of p53 in UbMdm4-/- mice largely rescues kidney development and terminal differentiation of the collecting duct. We conclude that Mdm4 plays a unique and vital role in Ub branching morphogenesis and collecting system development.
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Affiliation(s)
- Sylvia A Hilliard
- Tulane University School of Medicine, Department of Pediatrics, Section of Pediatric Nephrology, New Orleans, LA 70112, United States of America
| | - Yuwen Li
- Tulane University School of Medicine, Department of Pediatrics, Section of Pediatric Nephrology, New Orleans, LA 70112, United States of America
| | - Angelina Dixon
- Tulane University School of Medicine, Department of Pediatrics, Section of Pediatric Nephrology, New Orleans, LA 70112, United States of America
| | - Samir S El-Dahr
- Tulane University School of Medicine, Department of Pediatrics, Section of Pediatric Nephrology, New Orleans, LA 70112, United States of America.
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Kubinyecz O, Vikhe PP, Purnell T, Brown SDM, Tateossian H. The Jeff Mouse Mutant Model for Chronic Otitis Media Manifests Gain-of-Function as Well as Loss-of-Function Effects. Front Genet 2020; 11:498. [PMID: 32508883 PMCID: PMC7248398 DOI: 10.3389/fgene.2020.00498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 04/22/2020] [Indexed: 11/13/2022] Open
Abstract
Chronic otitis media (OM) is the most common cause of hearing loss worldwide, yet the underlying genetics and molecular pathology are poorly understood. The mouse mutant Jeff is a single gene mouse model for OM identified from a deafness screen as part of an ENU mutagenesis program at MRC Harwell. Jeff carries a missense mutation in the Fbxo11 gene. Jeff heterozygotes (Fbxo11 Jf/+ ) develop chronic OM at weaning and have reduced hearing. Homozygotes (Fbxo11 Jf/Jf ) display perinatal lethality due to developmental epithelial abnormalities. In order to investigate the role of FBXO11 and the type of mutation responsible for the phenotype of the Jeff mice, a knock-out mouse model was created and compared to Jeff. Surprisingly, the heterozygote knock-outs (Fbxo11 tm2b/+ ) show a much milder phenotype: they do not display any auditory deficit and only some of them have thickened middle ear epithelial lining with no fluid in the ear. In addition, the knock-out homozygote embryos (Fbxo11 tm2b/tm2b ), as well as the compound heterozygotes (Fbxo11 tm2b/Jf ) show only mild abnormalities compared to Jeff homozygotes (Fbxo11 Jf/Jf ). Interestingly, 3 days after intranasal inoculation of the Fbxo11 tm2b/+ mice with non-typeable Haemophilus influenzae (NTHi) a proportion of them have inflamed middle ear mucosa and fluid accumulation in the ear suggesting that the Fbxo11 knock-out mice are predisposed to NTHi induced middle ear inflammation. In conclusion, the finding that the phenotype of the Jeff mutant is much more severe than the knock-out indicates that the mutation in Jeff manifests gain-of-function as well as loss-of-function effects at both embryonic and adult stages.
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Affiliation(s)
| | | | | | | | - Hilda Tateossian
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell, United Kingdom
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Vikhe PP, Tateossian H, Bharj G, Brown SDM, Hood DW. Mutation in Fbxo11 Leads to Altered Immune Cell Content in Jeff Mouse Model of Otitis Media. Front Genet 2020; 11:50. [PMID: 32117459 PMCID: PMC7026503 DOI: 10.3389/fgene.2020.00050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 01/16/2020] [Indexed: 12/15/2022] Open
Abstract
The Jeff mouse mutant carries a mutation in the F-box only 11 gene (Fbxo11) and heterozygous animals display conductive deafness due to the development of otitis media (OM). The Fbxo11 locus is also associated with chronic otitis media with effusion (COME) and recurrent OM in humans. The Jeff mutation affects the ability of FBXO11 to stabilize p53 that leads to perturbation in the TGF-beta/Smad2 signaling pathway important in immunity and inflammation. In the current study, we evaluated the effect of the Jeff mutation on the immune cell content using multicolor flow cytometry. In blood of Jeff heterozygotes, we observed a significant increase in the number of NK, dendritic (CD11b+), neutrophils, and natural killer T (NKT) cells and a significant decrease in effector T-helper and B-lymphocytes compared to wild-type controls. The percentage of NK cells significantly decreased in the lungs of Jeff heterozygotes, with a concomitant reduction in B-lymphocytes and T-cytotoxic cells. In the spleen, Jeff heterozygotes displayed a significant decrease in mature B-lymphocytes, effector T-helper, and naïve T-cytotoxic cells. Neutrophils, dendritic, and NKT cells dominated bulla fluid in Jeff heterozygote mice. Similar analysis carried out on Fbxo11tm2b/+ heterozygotes, which carry a null allele, showed no difference when compared to wild-type. Cytokine/chemokine analysis revealed a significant increase in the G-CSF, GM-CSF, sTNFRI, TPO, and IL-7 levels in Jeff heterozygote serum compared to wild-type. This analysis increases our understanding of the role played by Fbxo11, a gene associated with human OM, in the systemic and localized cellular immune response associated with increased susceptibility to OM.
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Affiliation(s)
- Pratik P Vikhe
- Mammalian Genetics Unit, MRC Harwell Institute, Oxfordshire, United Kingdom
| | - Hilda Tateossian
- Mammalian Genetics Unit, MRC Harwell Institute, Oxfordshire, United Kingdom
| | - Gurpreet Bharj
- Mammalian Genetics Unit, MRC Harwell Institute, Oxfordshire, United Kingdom
| | - Steve D M Brown
- Mammalian Genetics Unit, MRC Harwell Institute, Oxfordshire, United Kingdom
| | - Derek W Hood
- Mammalian Genetics Unit, MRC Harwell Institute, Oxfordshire, United Kingdom
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Fan B, Wang W, Zhang X, Sun M, Wang X, Chen Z, Liu W, Wang Q, Yu N, Li X. Prevalence and prognostic value of FBXO11 expression in patients with clear cell renal cell carcinoma. BMC Cancer 2019; 19:534. [PMID: 31159774 PMCID: PMC6547552 DOI: 10.1186/s12885-019-5736-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 05/21/2019] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND FBXO11, a member of the F-box protein family, regulates the cell-cycle by promoting the degradation of Bcl-6 and p53. This protein has been implicated in the progression of several cancers, including renal cell carcinoma (RCC). The aim of this study was to determine the prognostic role of FBXO11 in the clinical outcome of RCC patients. METHODS FBXO11 mRNA expression was analysed in normal and RCC tissue microarrays of the Oncomine database. In addition, the in situ expression levels of stromal FBXO11 protein were assessed in primary RCC tissues from 227 patients (training and validation cohorts) using immunohistochemistry (IHC). Kaplan Meier and Cox regression analyses were used to determine the association between FBXO11 expression and cliniopathological factors. A nomogram was established using the significant prognostic factors to predict overall survival (OS) of RCC patients after one, three and 5 years. RESULTS In the Oncomine database, FBXO11 mRNA levels were lower in normal tissues than in cancer tissues, including clear cell renal cell carcinoma (ccRCC), papillary renal cell carcinoma (pRCC), hereditary ccRCC, non-hereditary ccRCC, VHL mutant ccRCC and VHL wild-type ccRCC. In addition, FBXO11 expression was also significantly higher in metastatic kidney cancer than in primary cancer. Immunohistochemical analysis reported that 57.3% (86 of 150) of the training cohort and 57.1% (44 of 77) of the validation cohort were scored as having high FBXO11 staining density. FBXO11 expression was significantly associated with Fuhrman grade (p = 0.003), UISS score (p = 0.021) and age (p = 0.048) in the training cohort. Furthermore, Kaplan-Meier survival analysis showed that higher FBXO11 levels, T stage, UISS scores and SSIGN score were associated with poor OS in ccRCC patients. Multivariate Cox analysis demonstrated that higher FBXO11 levels and higher UISS score were independent prognostic indicators for OS. Nomogram, calibration plots, AUC values and the C-index showed that the predictive accuracy of conventional prognostic models, including UISS score and SSIGN score, was improved when FBXO11 expression was added. CONCLUSIONS FBXO11 expression was closely related to RCC malignancy and poor prognosis, indicating its potential as a prognostic marker as well as a therapeutic target for RCC.
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Affiliation(s)
- Bo Fan
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Wei Wang
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Xianping Zhang
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Min Sun
- Department of General Surgery, Taihe Hospital of Hubei University of Medicine, Shiyan, 442000, Hubei Province, China
| | - Xiaogang Wang
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Zhiqi Chen
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Wankai Liu
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Qun Wang
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Na Yu
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Xiancheng Li
- Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China.
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Del-Pozo J, MacIntyre N, Azar A, Glover J, Milne E, Cheeseman M. Chronic otitis media is initiated by a bulla cavitation defect in the FBXO11 mouse model. Dis Model Mech 2019; 12:12/3/dmm038315. [PMID: 30898767 PMCID: PMC6451434 DOI: 10.1242/dmm.038315] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 02/25/2019] [Indexed: 12/20/2022] Open
Abstract
Auditory bulla cavitation defects are a cause of otitis media, but the normal cellular pattern of bulla mesenchyme regression and its failure are not well understood. In mice, neural-crest-derived mesenchyme occupies the bulla from embryonic day 17.5 (E17.5) to postnatal day 11 (P11) and then regresses to form the adult air-filled bulla cavity. We report that bulla mesenchyme is bordered by a single layer of non-ciliated epithelium characterized by interdigitating cells with desmosome cell junctions and a basal lamina, and by Bpifa1 gene expression and laminin staining of the basal lamina. At P11-P12, the mesenchyme shrinks: mesenchyme-associated epithelium shortens, and mesenchymal cells and extracellular matrix collagen fibrils condense, culminating in the formation of cochlea promontory mucosa bordered by compact non-ciliated epithelial cells. FBXO11 is a candidate disease gene in human chronic otitis media with effusion and we report that a bulla cavitation defect initiates the pathogenesis of otitis media in the established mouse model Jeff (Fbxo11Jf/+). Persistent mesenchyme in Fbxo11Jf/+ bullae has limited mesenchymal cell condensation, fibrosis and hyperplasia of the mesenchyme-associated epithelium. Subsequent modification forms fibrous adhesions that link the mucosa and the tympanic membrane, and this is accompanied by dystrophic mineralization and accumulation of serous effusion in the bulla cavity. Mouse models of bulla cavitation defects are important because their study in humans is limited to post-mortem samples. This work indicates new diagnostic criteria for this otitis media aetiology in humans, and the prospects of studying the molecular mechanisms of murine bulla cavitation in organ culture. Summary: FBXO11 is a candidate disease gene for otitis media in humans and the authors report that a bulla cavitation defect initiates otitis media in the Fbxo11Jf/+ mouse model.
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Affiliation(s)
- Jorge Del-Pozo
- Veterinary Pathology, The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK
| | - Neil MacIntyre
- Veterinary Pathology, The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK
| | - Ali Azar
- Developmental Biology Division, Roslin Institute and The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK
| | - James Glover
- Developmental Biology Division, Roslin Institute and The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK
| | - Elspeth Milne
- Veterinary Pathology, The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK
| | - Michael Cheeseman
- Developmental Biology Division, Roslin Institute and The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK .,Centre for Comparative Pathology & Division of Pathology, University of Edinburgh, Institute of Genetics & Molecular Medicine, Crewe Road, Edinburgh EH4 2XR, UK
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Bowen ME, Attardi LD. The role of p53 in developmental syndromes. J Mol Cell Biol 2019; 11:200-211. [PMID: 30624728 PMCID: PMC6478128 DOI: 10.1093/jmcb/mjy087] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 11/22/2018] [Accepted: 01/06/2019] [Indexed: 12/17/2022] Open
Abstract
While it is well appreciated that loss of the p53 tumor suppressor protein promotes cancer, growing evidence indicates that increased p53 activity underlies the developmental defects in a wide range of genetic syndromes. The inherited or de novo mutations that cause these syndromes affect diverse cellular processes, such as ribosome biogenesis, DNA repair, and centriole duplication, and analysis of human patient samples and mouse models demonstrates that disrupting these cellular processes can activate the p53 pathway. Importantly, many of the developmental defects in mouse models of these syndromes can be rescued by loss of p53, indicating that inappropriate p53 activation directly contributes to their pathogenesis. A role for p53 in driving developmental defects is further supported by the observation that mouse strains with broad p53 hyperactivation, due to mutations affecting p53 pathway components, display a host of tissue-specific developmental defects, including hematopoietic, neuronal, craniofacial, cardiovascular, and pigmentation defects. Furthermore, germline activating mutations in TP53 were recently identified in two human patients exhibiting bone marrow failure and other developmental defects. Studies in mice suggest that p53 drives developmental defects by inducing apoptosis, restraining proliferation, or modulating other developmental programs in a cell type-dependent manner. Here, we review the growing body of evidence from mouse models that implicates p53 as a driver of tissue-specific developmental defects in diverse genetic syndromes.
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Affiliation(s)
- Margot E Bowen
- Division of Radiation and Cancer Biology in the Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA, USA
| | - Laura D Attardi
- Division of Radiation and Cancer Biology in the Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA, USA
- Department of Genetics, Stanford University School of Medicine, Stanford, CA, USA
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Bhutta MF, Thornton RB, Kirkham LAS, Kerschner JE, Cheeseman MT. Understanding the aetiology and resolution of chronic otitis media from animal and human studies. Dis Model Mech 2018; 10:1289-1300. [PMID: 29125825 PMCID: PMC5719252 DOI: 10.1242/dmm.029983] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Inflammation of the middle ear, known clinically as chronic otitis media, presents in different forms, such as chronic otitis media with effusion (COME; glue ear) and chronic suppurative otitis media (CSOM). These are highly prevalent diseases, especially in childhood, and lead to significant morbidity worldwide. However, much remains unclear about this disease, including its aetiology, initiation and perpetuation, and the relative roles of mucosal and leukocyte biology, pathogens, and Eustachian tube function. Chronic otitis media is commonly modelled in mice but most existing models only partially mimic human disease and many are syndromic. Nevertheless, these models have provided insights into potential disease mechanisms, and have implicated altered immune signalling, mucociliary function and Eustachian tube function as potential predisposing mechanisms. Clinical studies of chronic otitis media have yet to implicate a particular molecular pathway or mechanism, and current human genetic studies are underpowered. We also do not fully understand how existing interventions, such as tympanic membrane repair, work, nor how chronic otitis media spontaneously resolves. This Clinical Puzzle article describes our current knowledge of chronic otitis media and the existing research models for this condition. It also identifies unanswered questions about its pathogenesis and treatment, with the goal of advancing our understanding of this disease to aid the development of novel therapeutic interventions. Summary: Chronic middle ear inflammation is a common disease. Animal models, and in particular mouse models, have been used to elucidate some potential mechanisms, including dysfunction in immune signalling, mucociliary function or Eustachian tube function.
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Affiliation(s)
- Mahmood F Bhutta
- Department of ENT, Brighton and Sussex University Hospitals NHS Trust, Brighton, BN2 5BE, England .,Division of Paediatrics, University of Western Australia, Subiaco, WA 6008, Australia
| | - Ruth B Thornton
- Division of Paediatrics, University of Western Australia, Subiaco, WA 6008, Australia.,Wesfarmers Centre of Vaccines and Infectious Diseases, Telethon Kids Institute, Subiaco, WA 6008, Australia
| | - Lea-Ann S Kirkham
- Division of Paediatrics, University of Western Australia, Subiaco, WA 6008, Australia.,Wesfarmers Centre of Vaccines and Infectious Diseases, Telethon Kids Institute, Subiaco, WA 6008, Australia
| | - Joseph E Kerschner
- Office of the Dean, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Michael T Cheeseman
- Division of Developmental Biology, Roslin Institute, University of Edinburgh, Midlothian, EH23 9RG, Scotland
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Abstract
Most human cancers harbor mutations in the gene encoding p53. As a result, research on p53 in the past few decades has focused primarily on its role as a tumor suppressor. One consequence of this focus is that the functions of p53 in development have largely been ignored. However, recent advances, such as the genomic profiling of embryonic stem cells, have uncovered the significance and mechanisms of p53 functions in mammalian cell differentiation and development. As we review here, these recent findings reveal roles that complement the well-established roles for p53 in tumor suppression.
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Affiliation(s)
- Abhinav K Jain
- Department of Epigenetics and Molecular Carcinogenesis, Center for Stem Cell and Development Biology, Center for Cancer Epigenetics, The University of Texas MD Anderson UT Health Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Michelle Craig Barton
- Department of Epigenetics and Molecular Carcinogenesis, Center for Stem Cell and Development Biology, Center for Cancer Epigenetics, The University of Texas MD Anderson UT Health Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Bhutta MF, Lambie J, Hobson L, Goel A, Hafrén L, Einarsdottir E, Mattila PS, Farrall M, Brown S, Burton MJ. A mouse-to-man candidate gene study identifies association of chronic otitis media with the loci TGIF1 and FBXO11. Sci Rep 2017; 7:12496. [PMID: 28970529 PMCID: PMC5624881 DOI: 10.1038/s41598-017-12784-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 09/15/2017] [Indexed: 01/18/2023] Open
Abstract
Chronic otitis media with effusion (COME) is the most common cause of hearing loss in children, and known to have high heritability. Mutant mouse models have identified Fbxo11, Evi1, Tgif1, and Nisch as potential risk loci. We recruited children aged 10 and under undergoing surgical treatment for COME from 35 hospitals in the UK, and their nuclear family. We performed association testing with the loci FBXO11, EVI1, TGIF1 and NISCH and sought to replicate significant results in a case-control cohort from Finland. We tested 1296 families (3828 individuals), and found strength of association with the T allele at rs881835 (p = 0.006, OR 1.39) and the G allele at rs1962914 (p = 0.007, OR 1.58) at TGIF1, and the A allele at rs10490302 (p = 0.016, OR 1.17) and the G allele at rs2537742 (p = 0.038, OR 1.16) at FBXO11. Results were not replicated. This study supports smaller studies that have also suggested association of otitis media with polymorphism at FBX011, but this is the first study to report association with the locus TGIF1. Both FBX011 and TGIF1 are involved in TGF-β signalling, suggesting this pathway may be important in the transition from acute to chronic middle ear inflammation, and a potential molecular target.
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Affiliation(s)
- Mahmood F Bhutta
- Brighton and Sussex University Hospitals NHS Trust, Eastern Road, Brighton, BN2 5BE, UK. .,Nuffield Department of Surgical Sciences, University of Oxford, Headley Way, Oxford, OX3 9DU, UK. .,MRC Harwell Institute, Harwell, OX11 0RD, UK.
| | - Jane Lambie
- Nuffield Department of Surgical Sciences, University of Oxford, Headley Way, Oxford, OX3 9DU, UK.,MRC Harwell Institute, Harwell, OX11 0RD, UK
| | - Lindsey Hobson
- Nuffield Department of Surgical Sciences, University of Oxford, Headley Way, Oxford, OX3 9DU, UK.,MRC Harwell Institute, Harwell, OX11 0RD, UK
| | - Anuj Goel
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DU, UK.,Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Lena Hafrén
- Department of Otorhinolaryngology, Helsinki University Central Hospital, Helsinki, HUS, Finland
| | - Elisabet Einarsdottir
- Folkhälsan Institute of Genetics, and Molecular Neurology Research Program, University of Helsinki, Helsinki, Finland.,Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Petri S Mattila
- Department of Otorhinolaryngology, Helsinki University Central Hospital, Helsinki, HUS, Finland
| | - Martin Farrall
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DU, UK.,Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Steve Brown
- MRC Harwell Institute, Harwell, OX11 0RD, UK
| | - Martin J Burton
- Nuffield Department of Surgical Sciences, University of Oxford, Headley Way, Oxford, OX3 9DU, UK.,The UK Cochrane Centre, Summertown Pavilion, 18-24 Middle Way Oxford, Oxford, OX2 7LG, UK
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