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Liu J, Gao L, Zhou N, Jiang Z, Che S, Deng Y, Zang N, Ren L, Xie X, Xie J, Liu E. p53 suppresses the inflammatory response following respiratory syncytial virus infection by inhibiting TLR2. Virology 2024; 593:110018. [PMID: 38368639 DOI: 10.1016/j.virol.2024.110018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/01/2024] [Accepted: 02/09/2024] [Indexed: 02/20/2024]
Abstract
-Respiratory syncytial virus (RSV) is a pivotal virus leading to acute lower respiratory tract infections in children under 5 years old. This study aimed to explore the correlation between p53 and Toll-like receptors (TLRs) post RSV infection. p53 levels exhibited a substantial decrease in nasopharyngeal aspirates (NPAs) from infants with RSV infection compared to control group. Manipulating p53 expression had no significant impact on RSV replication or interferon signaling pathway. Suppression of p53 expression led to heightened inflammation following RSV infection in A549 cells or airways of BALB/c mice. while stabilizing p53 expression using Nutlin-3a mitigated the inflammatory response in A549 cells. Additionally, Inhibiting p53 expression significantly increased Toll-like receptor 2 (TLR2) expression in RSV-infected epithelial cells and BALB/c mice. Furthermore, the TLR2 inhibitor, C29, effectively reduced inflammation mediated by p53 in A549 cells. Collectively, our results indicate that p53 modulates the inflammatory response after RSV infection through TLR2.
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Affiliation(s)
- Jiao Liu
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China; Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Leiqiong Gao
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China; Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Na Zhou
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China; Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Zhenghong Jiang
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China; Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Siyi Che
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China; Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Yu Deng
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Na Zang
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Luo Ren
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China; Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Xiaohong Xie
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Jun Xie
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.
| | - Enmei Liu
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.
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Peuget S, Zhou X, Selivanova G. Translating p53-based therapies for cancer into the clinic. Nat Rev Cancer 2024; 24:192-215. [PMID: 38287107 DOI: 10.1038/s41568-023-00658-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/12/2023] [Indexed: 01/31/2024]
Abstract
Inactivation of the most important tumour suppressor gene TP53 occurs in most, if not all, human cancers. Loss of functional wild-type p53 is achieved via two main mechanisms: mutation of the gene leading to an absence of tumour suppressor activity and, in some cases, gain-of-oncogenic function; or inhibition of the wild-type p53 protein mediated by overexpression of its negative regulators MDM2 and MDMX. Because of its high potency as a tumour suppressor and the dependence of at least some established tumours on its inactivation, p53 appears to be a highly attractive target for the development of new anticancer drugs. However, p53 is a transcription factor and therefore has long been considered undruggable. Nevertheless, several innovative strategies have been pursued for targeting dysfunctional p53 for cancer treatment. In mutant p53-expressing tumours, the predominant strategy is to restore tumour suppressor function with compounds acting either in a generic manner or otherwise selective for one or a few specific p53 mutations. In addition, approaches to deplete mutant p53 or to target vulnerabilities created by mutant p53 expression are currently under development. In wild-type p53 tumours, the major approach is to protect p53 from the actions of MDM2 and MDMX by targeting these negative regulators with inhibitors. Although the results of at least some clinical trials of MDM2 inhibitors and mutant p53-restoring compounds are promising, none of the agents has yet been approved by the FDA. Alternative strategies, based on a better understanding of p53 biology, the mechanisms of action of compounds and treatment regimens as well as the development of new technologies are gaining interest, such as proteolysis-targeting chimeras for MDM2 degradation. Other approaches are taking advantage of the progress made in immune-based therapies for cancer. In this Review, we present these ongoing clinical trials and emerging approaches to re-evaluate the current state of knowledge of p53-based therapies for cancer.
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Affiliation(s)
- Sylvain Peuget
- Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Xiaolei Zhou
- Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Institute of Materials Science and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Galina Selivanova
- Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
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Bhardwaj J, Upadhye A, Gaskin EL, Doumbo S, Kayentao K, Ongoiba A, Traore B, Crompton PD, Tran TM. Neither the African-Centric S47 Nor P72 Variant of TP53 Is Associated With Reduced Risk of Febrile Malaria in a Malian Cohort Study. J Infect Dis 2023; 228:202-211. [PMID: 36961831 PMCID: PMC10345479 DOI: 10.1093/infdis/jiad066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 02/02/2023] [Accepted: 03/21/2023] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND TP53 has been shown to play a role in inflammatory processes, including malaria. We previously found that p53 attenuates parasite-induced inflammation and predicts clinical protection to Plasmodium falciparum infection in Malian children. Here, we investigated whether p53 codon 47 and 72 polymorphisms are associated with differential risk of P. falciparum infection and uncomplicated malaria in a prospective cohort study of malaria immunity. METHODS p53 codon 47 and 72 polymorphisms were determined by sequencing TP53 exon 4 in 631 Malian children and adults enrolled in the Kalifabougou cohort study. The effects of these polymorphisms on the prospective risk of febrile malaria, incident parasitemia, and time to fever after incident parasitemia over 6 months of intense malaria transmission were assessed using Cox proportional hazards models. RESULTS Confounders of malaria risk, including age and hemoglobin S or C, were similar between individuals with or without p53 S47 and R72 polymorphisms. Relative to their respective common variants, neither S47 nor R72 was associated with differences in prospective risk of febrile malaria, incident parasitemia, or febrile malaria after parasitemia. CONCLUSIONS These findings indicate that p53 codon 47 and 72 polymorphisms are not associated with protection against incident P. falciparum parasitemia or uncomplicated febrile malaria.
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Affiliation(s)
- Jyoti Bhardwaj
- Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Aditi Upadhye
- Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Erik L Gaskin
- Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Safiatou Doumbo
- Mali International Center of Excellence in Research, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Kassoum Kayentao
- Mali International Center of Excellence in Research, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Aissata Ongoiba
- Mali International Center of Excellence in Research, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Boubacar Traore
- Mali International Center of Excellence in Research, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Peter D Crompton
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, USA
| | - Tuan M Tran
- Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Ryan White Center for Pediatric Infectious Diseases and Global Health, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Viasus D, Simonetti AF, Nonell L, Vidal O, Meije Y, Ortega L, Arnal M, Bódalo-Torruella M, Sierra M, Rombauts A, Abelenda-Alonso G, Blanchart G, Gudiol C, Carratalà J. Whole-Blood Gene Expression Profiles Associated with Mortality in Community-Acquired Pneumonia. Biomedicines 2023; 11:biomedicines11020429. [PMID: 36830965 PMCID: PMC9953679 DOI: 10.3390/biomedicines11020429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/25/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
(1) Background: Information regarding gene expression profiles and the prognosis of community-acquired pneumonia (CAP) is scarce. We aimed to examine the differences in the gene expression profiles in peripheral blood at hospital admission between patients with CAP who died during hospitalization and those who survived. (2) Methods: This is a multicenter study of nonimmunosuppressed adult patients who required hospitalization for CAP. Whole blood samples were obtained within 24 h of admission for genome-expression-profile analysis. Gene expression profiling identified both differentially expressed genes and enriched gene sets. (3) Results: A total of 198 samples from adult patients who required hospitalization for CAP were processed, of which 13 were from patients who died. Comparison of gene expression between patients who died and those who survived yielded 49 differentially expressed genes, 36 of which were upregulated and 13 downregulated. Gene set enrichment analysis (GSEA) identified four positively enriched gene sets in survivors, mainly associated with the interferon-alpha response, apoptosis, and sex hormone pathways. Similarly, GSEA identified seven positively enriched gene sets, associated with the oxidative stress, endoplasmic reticulum stress, oxidative phosphorylation, and angiogenesis pathways, in the patients who died. Protein-protein-interaction-network analysis identified FOS, CDC42, SLC26A10, EIF4G2, CCND3, ASXL1, UBE2S, and AURKA as the main gene hubs. (4) Conclusions: We found differences in gene expression profiles at hospital admission between CAP patients who died and those who survived. Our findings may help to identify novel candidate pathways and targets for potential intervention and biomarkers for risk stratification.
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Affiliation(s)
- Diego Viasus
- Department of Medicine, Division of Health Sciences, Universidad del Norte and Hospital Universidad del Norte, Barranquilla 081001, Colombia
- Correspondence:
| | - Antonella F. Simonetti
- Department of Internal Medicine, Consorci Sanitari Alt Penedès-Garraf, 08720 Sant Pere de Ribes, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Institulo de Salud Carlos III, 28029 Madrid, Spain
| | - Lara Nonell
- MARGenomics, Hospital del Mar Medical Research Institute (IMIM), 08003 Barcelona, Spain
| | - Oscar Vidal
- Department of Medicine, Division of Health Sciences, Universidad del Norte and Hospital Universidad del Norte, Barranquilla 081001, Colombia
| | - Yolanda Meije
- Unit of Infectious Disease, Department of Internal Medicine, Hospital de Barcelona—Societat Cooperativa d’Instal·lacions Assistencials Sanitàries (SCIAS), 08029 Barcelona, Spain
| | - Lucía Ortega
- Unit of Infectious Disease, Department of Internal Medicine, Hospital de Barcelona—Societat Cooperativa d’Instal·lacions Assistencials Sanitàries (SCIAS), 08029 Barcelona, Spain
| | - Magdalena Arnal
- MARGenomics, Hospital del Mar Medical Research Institute (IMIM), 08003 Barcelona, Spain
| | | | - Montserrat Sierra
- Microbiology Unit, Department of Clinical Laboratory, Hospital de Barcelona—Societat Cooperativa d’Instal·lacions Assistencials Sanitàries (SCIAS), 08029 Barcelona, Spain
| | - Alexander Rombauts
- Department of Infectious Diseases, Bellvitge University Hospital—Bellvitge Biomedical Research Institute (IDIBELL), 08907 Barcelona, Spain
| | - Gabriela Abelenda-Alonso
- Department of Infectious Diseases, Bellvitge University Hospital—Bellvitge Biomedical Research Institute (IDIBELL), 08907 Barcelona, Spain
| | - Gemma Blanchart
- Cardiovascular Risk and Nutrition Research Group, Hospital del Mar Medical Research Institute (IMIM), 08003 Barcelona, Spain
| | - Carlota Gudiol
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Institulo de Salud Carlos III, 28029 Madrid, Spain
- Department of Infectious Diseases, Bellvitge University Hospital—Bellvitge Biomedical Research Institute (IDIBELL), 08907 Barcelona, Spain
- Department of Clinical Sciences, University of Barcelona, 08907 Barcelona, Spain
| | - Jordi Carratalà
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Institulo de Salud Carlos III, 28029 Madrid, Spain
- Department of Infectious Diseases, Bellvitge University Hospital—Bellvitge Biomedical Research Institute (IDIBELL), 08907 Barcelona, Spain
- Department of Clinical Sciences, University of Barcelona, 08907 Barcelona, Spain
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Rajavel A, Klees S, Hui Y, Schmitt AO, Gültas M. Deciphering the Molecular Mechanism Underlying African Animal Trypanosomiasis by Means of the 1000 Bull Genomes Project Genomic Dataset. BIOLOGY 2022; 11:biology11050742. [PMID: 35625470 PMCID: PMC9138820 DOI: 10.3390/biology11050742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 11/16/2022]
Abstract
Simple Summary Climate change is increasing the risk of spreading vector-borne diseases such as African Animal Trypanosomiasis (AAT), which is causing major economic losses, especially in sub-Saharan African countries. Mainly considering this disease, we have investigated transcriptomic and genomic data from two cattle breeds, namely Boran and N‘Dama, where the former is known for its susceptibility and the latter one for its tolerance to the AAT. Despite the rich literature on this disease, there is still a need to investigate underlying genetic mechanisms to decipher the complex interplay of regulatory SNPs (rSNPs), their corresponding gene expression profiles and the downstream effectors associated with the AAT disease. The findings of this study complement our previous results, which mainly involve the upstream events, including transcription factors (TFs) and their co-operations as well as master regulators. Moreover, our investigation of significant rSNPs and effectors found in the liver, spleen and lymph node tissues of both cattle breeds could enhance the understanding of distinct mechanisms leading to either resistance or susceptibility of cattle breeds. Abstract African Animal Trypanosomiasis (AAT) is a neglected tropical disease and spreads by the vector tsetse fly, which carries the infectious Trypanosoma sp. in their saliva. Particularly, this parasitic disease affects the health of livestock, thereby imposing economic constraints on farmers, costing billions of dollars every year, especially in sub-Saharan African countries. Mainly considering the AAT disease as a multistage progression process, we previously performed upstream analysis to identify transcription factors (TFs), their co-operations, over-represented pathways and master regulators. However, downstream analysis, including effectors, corresponding gene expression profiles and their association with the regulatory SNPs (rSNPs), has not yet been established. Therefore, in this study, we aim to investigate the complex interplay of rSNPs, corresponding gene expression and downstream effectors with regard to the AAT disease progression based on two cattle breeds: trypanosusceptible Boran and trypanotolerant N’Dama. Our findings provide mechanistic insights into the effectors involved in the regulation of several signal transduction pathways, thereby differentiating the molecular mechanism with regard to the immune responses of the cattle breeds. The effectors and their associated genes (especially MAPKAPK5, CSK, DOK2, RAC1 and DNMT1) could be promising drug candidates as they orchestrate various downstream regulatory cascades in both cattle breeds.
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Affiliation(s)
- Abirami Rajavel
- Breeding Informatics Group, Department of Animal Sciences, Georg-August University, Margarethe von Wrangell-Weg 7, 37075 Göttingen, Germany; (S.K.); (Y.H.); (A.O.S.)
- Center for Integrated Breeding Research (CiBreed), Georg-August University, Carl-Sprengel-Weg 1, 37075 Göttingen, Germany
- Correspondence: (A.R.); (M.G.)
| | - Selina Klees
- Breeding Informatics Group, Department of Animal Sciences, Georg-August University, Margarethe von Wrangell-Weg 7, 37075 Göttingen, Germany; (S.K.); (Y.H.); (A.O.S.)
- Center for Integrated Breeding Research (CiBreed), Georg-August University, Carl-Sprengel-Weg 1, 37075 Göttingen, Germany
| | - Yuehan Hui
- Breeding Informatics Group, Department of Animal Sciences, Georg-August University, Margarethe von Wrangell-Weg 7, 37075 Göttingen, Germany; (S.K.); (Y.H.); (A.O.S.)
| | - Armin Otto Schmitt
- Breeding Informatics Group, Department of Animal Sciences, Georg-August University, Margarethe von Wrangell-Weg 7, 37075 Göttingen, Germany; (S.K.); (Y.H.); (A.O.S.)
- Center for Integrated Breeding Research (CiBreed), Georg-August University, Carl-Sprengel-Weg 1, 37075 Göttingen, Germany
| | - Mehmet Gültas
- Center for Integrated Breeding Research (CiBreed), Georg-August University, Carl-Sprengel-Weg 1, 37075 Göttingen, Germany
- Faculty of Agriculture, South Westphalia University of Applied Sciences, Lübecker Ring 2, 59494 Soest, Germany
- Correspondence: (A.R.); (M.G.)
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Enterobacteria impair host p53 tumor suppressor activity through mRNA destabilization. Oncogene 2022; 41:2173-2186. [PMID: 35197571 PMCID: PMC8993692 DOI: 10.1038/s41388-022-02238-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/24/2022] [Accepted: 02/08/2022] [Indexed: 11/25/2022]
Abstract
Increasing evidence highlights the role of bacteria in the physiopathology of cancer. However, the underlying molecular mechanisms remains poorly understood. Several cancer-associated bacteria have been shown to produce toxins which interfere with the host defense against tumorigenesis. Here, we show that lipopolysaccharides from Klebsiella pneumoniae and other Enterobacteria strongly inhibit the host tumor suppressor p53 pathway through a novel mechanism of p53 regulation. We found that lipopolysaccharides destabilize TP53 mRNA through a TLR4-NF-κB-mediated inhibition of the RNA-binding factor Wig-1. Importantly, we show that K. pneumoniae disables two major tumor barriers, oncogene-induced DNA damage signaling and senescence, by impairing p53 transcriptional activity upon DNA damage and oncogenic stress. Furthermore, we found an inverse correlation between the levels of TLR4 and p53 mutation in colorectal tumors. Hence, our data suggest that the repression of p53 by Enterobacteria via TLR4 alleviates the selection pressure for p53 oncogenic mutations and shapes the genomic evolution of cancer.
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Borozan I, Zaidi SH, Harrison TA, Phipps AI, Zheng J, Lee S, Trinh QM, Steinfelder RS, Adams J, Banbury BL, Berndt SI, Brezina S, Buchanan DD, Bullman S, Cao Y, Farris AB, Figueiredo JC, Giannakis M, Heisler LE, Hopper JL, Lin Y, Luo X, Nishihara R, Mardis ER, Papadopoulos N, Qu C, Reid EEG, Thibodeau SN, Harlid S, Um CY, Hsu L, Gsur A, Campbell PT, Gallinger S, Newcomb PA, Ogino S, Sun W, Hudson TJ, Ferretti V, Peters U. Molecular and Pathology Features of Colorectal Tumors and Patient Outcomes Are Associated with Fusobacterium nucleatum and Its Subspecies animalis. Cancer Epidemiol Biomarkers Prev 2022; 31:210-220. [PMID: 34737207 PMCID: PMC8755593 DOI: 10.1158/1055-9965.epi-21-0463] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/27/2021] [Accepted: 10/21/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Fusobacterium nucleatum (F. nucleatum) activates oncogenic signaling pathways and induces inflammation to promote colorectal carcinogenesis. METHODS We characterized F. nucleatum and its subspecies in colorectal tumors and examined associations with tumor characteristics and colorectal cancer-specific survival. We conducted deep sequencing of nusA, nusG, and bacterial 16s rRNA genes in tumors from 1,994 patients with colorectal cancer and assessed associations between F. nucleatum presence and clinical characteristics, colorectal cancer-specific mortality, and somatic mutations. RESULTS F. nucleatum, which was present in 10.3% of tumors, was detected in a higher proportion of right-sided and advanced-stage tumors, particularly subspecies animalis. Presence of F. nucleatum was associated with higher colorectal cancer-specific mortality (HR, 1.97; P = 0.0004). This association was restricted to nonhypermutated, microsatellite-stable tumors (HR, 2.13; P = 0.0002) and those who received chemotherapy [HR, 1.92; confidence interval (CI), 1.07-3.45; P = 0.029). Only F. nucleatum subspecies animalis, the main subspecies detected (65.8%), was associated with colorectal cancer-specific mortality (HR, 2.16; P = 0.0016), subspecies vincentii and nucleatum were not (HR, 1.07; P = 0.86). Additional adjustment for tumor stage suggests that the effect of F. nucleatum on mortality is partly driven by a stage shift. Presence of F. nucleatum was associated with microsatellite instable tumors, tumors with POLE exonuclease domain mutations, and ERBB3 mutations, and suggestively associated with TP53 mutations. CONCLUSIONS F. nucleatum, and particularly subspecies animalis, was associated with a higher colorectal cancer-specific mortality and specific somatic mutated genes. IMPACT Our findings identify the F. nucleatum subspecies animalis as negatively impacting colorectal cancer mortality, which may occur through a stage shift and its effect on chemoresistance.
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Affiliation(s)
- Ivan Borozan
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Syed H Zaidi
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Tabitha A Harrison
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Amanda I Phipps
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Jiayin Zheng
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Stephen Lee
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Quang M Trinh
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Robert S Steinfelder
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Jeremy Adams
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Barbara L Banbury
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Sonja I Berndt
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Stefanie Brezina
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Daniel D Buchanan
- Colorectal Oncogenomics Group, Department of Clinical Pathology, The University of Melbourne, Parkville, Victoria, Australia
- The University of Melbourne Centre for Cancer Research, Victorian Comprehensive Cancer Centre, Parkville, Victoria, Australia
- Familial Cancer Clinic, Genetic Medicine, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Susan Bullman
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Yin Cao
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine in St. Louis, St Louis, Missouri
- Siteman Cancer Center, Washington University School of Medicine in St. Louis, St Louis, Missouri
| | - Alton B Farris
- Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Jane C Figueiredo
- Department of Medicine, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California
| | - Marios Giannakis
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | | | - John L Hopper
- The University of Melbourne Centre for Cancer Research, Victorian Comprehensive Cancer Centre, Parkville, Victoria, Australia
| | - Yi Lin
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Xuemei Luo
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Reiko Nishihara
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Elaine R Mardis
- The Steve and Cindy Rasmussen Institute for Genomic Medicine, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio
| | - Nickolas Papadopoulos
- Ludwig Center for Cancer Genetics and Therapeutics, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Medicine, Baltimore, Maryland
| | - Conghui Qu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Emma E G Reid
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Stephen N Thibodeau
- Division of Laboratory Genetics, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Sophia Harlid
- Oncology, Department of Radiation Sciences, Faculty of Medicine, Umeå University, Umeå, Sweden
| | - Caroline Y Um
- Behavioral and Epidemiology Research Group, American Cancer Society, Atlanta, Georgia
| | - Li Hsu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
- Department of Biostatistics, School of Public Health, University of Washington, Seattle, Washington
| | - Andrea Gsur
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Peter T Campbell
- Behavioral and Epidemiology Research Group, American Cancer Society, Atlanta, Georgia
| | - Steven Gallinger
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
- Lunenfeld-Tanenbaum Research Institute, Sinai Health, University of Toronto, Toronto, Ontario, Canada
- General Surgery, Surgery and Critical Care Program, University Health Network Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Polly A Newcomb
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington
| | - Shuji Ogino
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts
- Cancer Immunology Program, Dana-Farber/Harvard Cancer Center, Boston, Massachusetts
- Cancer Epidemiology Program, Dana-Farber/Harvard Cancer Center, Boston, Massachusetts
| | - Wei Sun
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington
| | - Thomas J Hudson
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Vincent Ferretti
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada.
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, Quebec, Canada
| | - Ulrike Peters
- Public Health Sciences Division, Fred Hutchinson Cancer Research Centre, Seattle, Washington.
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington
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8
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Maqbool A, Paul BT, Jesse FFA, Teik Chung EL, Mohd Lila MA, Haron AW. Biomarkers, immune responses and cellular changes in vaccinated and non-vaccinated goats during experimental infection of M. haemolytica A2 under tropical conditions. Microb Pathog 2021; 157:105001. [PMID: 34048891 DOI: 10.1016/j.micpath.2021.105001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 05/18/2021] [Accepted: 05/18/2021] [Indexed: 01/20/2023]
Abstract
BACKGROUND We investigated the biomarkers, immune responses and cellular changes in vaccinated and non-vaccinated goats experimentally challenged with M. haemolytica serotype A2 under rainy and hot tropical conditions. A total of twenty-four clinically healthy, non-pregnant, female goats randomly allocated to 2 groups of 12 goats each were used for the study. The 12 goats in each season were subdivided into three groups (n = 4), which served as the control (G-NEG), non-vaccinated (G-POS), and vaccinated (G-VACC). In week-1, the G-VACC received 2 mL of alum-precipitated pasteurellosis vaccine while G-POS and G-NEG received 2 ml of sterile PBS. In week 2, the G-POS and G-VACC received 1 mL intranasal spray containing 105 CFU of M. haemolytica serotype A2. Inoculation was followed by daily monitoring and weekly bleeding for eight weeks to collect data and serum for biomarkers and immune responses using commercial ELISA test kits. The goats were humanely euthanised at the end of the experiments to collect lungs and the submandibular lymph nodes tissue samples for gross and histopathological examinations. RESULTS Regardless of the season, we have observed a significant (p < 0.05) increase in serum concentrations of acute-phase proteins (haptoglobin, serum amyloid A), proinflammatory cytokines (interleukine-1β, interleukin-6), antibodies (immunoglobulin M, immunoglobulin G), and stress markers (cortisol and heat shock protein 70) in the G-POS goats compared to G-VACC and G-NEG. With regards to seasons, there was a significantly (p < 0.05) higher serum concentration with 1.5, 2 and 1-folds increase in the serum interleukin (IL)-1β, cortisol, and heat shock protein (HSP)-70 in the G-POS during rainy compared to the hot season. Histopathology of the lungs in G-POS goats revealed inflammatory cell infiltration, degeneration, haemorrhage/congestion, and pulmonary oedema in the alveoli spaces; thickening of the interstitium, and desquamation of bronchiolar epithelium. Cellular changes in the lymph node were characterized by a marked hypercellularity in G-POS goats. CONCLUSION Host responses to pneumonic mannheimiosis based on increased serum levels of biomarkers (cortisol, HSP70, IL-1β and IL-6) and severe cellular changes seen in the lungs and lymph nodes of G-POS goats compared to vaccinated goats and control group are influenced by the high environmental humidity recorded in the rainy season. Increased relative humidity in the rainy season is a significant stress factor for the higher susceptibility and severity of pneumonic mannheimiosis of goats in the tropics. Vaccination of goats using the alum precipitated Pasteurella multocida vaccine before the onset of the rainy season is recommended to minimise mortality due to potential outbreaks of pneumonia during the rainy season.
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Affiliation(s)
- Arsalan Maqbool
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia; Directorate of Animal Health, Livestock, and Dairy Development Department, Balochistan, 87300, Pakistan
| | - Bura Thlama Paul
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia; Veterinary Teaching Hospital, University of Maiduguri, 600230, Maiduguri, Borno State, Nigeria
| | - Faez Firdaus Abdullah Jesse
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia; Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
| | - Eric Lim Teik Chung
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia; Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Mohd Azmi Mohd Lila
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Abd Wahid Haron
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
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9
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Marruecos L, Manils J, Moreta C, Gómez D, Filgaira I, Serafin A, Cañas X, Espinosa L, Soler C. Single loss of a Trp53 allele triggers an increased oxidative, DNA damage and cytokine inflammatory responses through deregulation of IκBα expression. Cell Death Dis 2021; 12:359. [PMID: 33824284 PMCID: PMC8024389 DOI: 10.1038/s41419-021-03638-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 12/15/2022]
Abstract
Dose of Trp53, the main keeper of genome stability, influences tumorigenesis; however, the causes underlying and driving tumorigenesis over time by the loss of a single p53 allele are still poorly characterized. Here, we found that single p53 allele loss specifically impacted the oxidative, DNA damage and inflammatory status of hematopoietic lineages. In particular, single Trp53 allele loss in mice triggered oxidative stress in peripheral blood granulocytes and spleenocytes, whereas lack of two Trp53 alleles produced enhanced oxidative stress in thymus cells, resulting in a higher incidence of lymphomas in the Trp53 knockout (KO) mice compared with hemizygous (HEM). In addition, single or complete loss of Trp53 alleles, as well as p53 downregulation, led to a differential increase in basal, LPS- and UVB-induced expression of a plethora of pro-inflammatory cytokine, such as interleukin-12 (Il-12a), TNFα (Tnfa) and interleukin (Il-23a) in bone marrow-derived macrophage cells (BMDMs) compared to WT cells. Interestingly, p53-dependent increased inflammatory gene expression correlated with deregulated expression of the NF-κB pathway inhibitor IκBα. Chromatin immunoprecipitation data revealed decreased p65 binding to Nfkbia in the absence of p53 and p53 binding to Nfkbia promoter, uncovering a novel crosstalk mechanism between p53 and NF-κB transcription factors. Overall, our data suggest that single Trp53 allele loss can drive a sustained inflammatory, DNA damage and oxidative stress response that, over time, facilitate and support carcinogenesis.
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Affiliation(s)
- Laura Marruecos
- Cancer Research Program, CIBERONC Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain
| | - Joan Manils
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.,Department of Immunology & Inflammation, Imperial College London, London, United Kingdom
| | - Cristina Moreta
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Diana Gómez
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Ingrid Filgaira
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Anna Serafin
- PCB Animal Facility, Parc Científic de Barcelona, Barcelona, Spain
| | - Xavier Cañas
- Vall d'Hebron Institute of Research, Barcelona, Spain
| | - Lluís Espinosa
- Cancer Research Program, CIBERONC Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain
| | - Concepció Soler
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain. .,Neuropharmacology & Pain Group, Neuroscience Program, Institut d'Investigació Biomèdica de Bellvitge - IDIBELL, L'Hospitalet de Llobregat, Spain.
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10
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Saha D, Kundu S. A Molecular Interaction Map of Klebsiella pneumoniae and Its Human Host Reveals Potential Mechanisms of Host Cell Subversion. Front Microbiol 2021; 12:613067. [PMID: 33679637 PMCID: PMC7930833 DOI: 10.3389/fmicb.2021.613067] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 01/11/2021] [Indexed: 12/13/2022] Open
Abstract
Klebsiella pneumoniae is a leading cause of pneumonia and septicemia across the world. The rapid emergence of multidrug-resistant K. pneumoniae strains necessitates the discovery of effective drugs against this notorious pathogen. However, there is a dearth of knowledge on the mechanisms by which this deadly pathogen subverts host cellular machinery. To fill this knowledge gap, our study attempts to identify the potential mechanisms of host cell subversion by building a K. pneumoniae-human interactome based on rigorous computational methodology. The putative host targets inferred from the predicted interactome were found to be functionally enriched in the host's immune surveillance system and allied functions like apoptosis, hypoxia, etc. A multifunctionality-based scoring system revealed P53 as the most multifunctional protein among host targets accompanied by HIF1A and STAT1. Moreover, mining of host protein-protein interaction (PPI) network revealed that host targets interact among themselves to form a network (TTPPI), where P53 and CDC5L occupy a central position. The TTPPI is composed of several inter complex interactions which indicate that K. pneumoniae might disrupt functional coordination between these protein complexes through targeting of P53 and CDC5L. Furthermore, we identified four pivotal K. pneumoniae-targeted transcription factors (TTFs) that are part of TTPPI and are involved in generating host's transcriptional response to K. pneumoniae-mediated sepsis. In a nutshell, our study identifies some of the pivotal molecular targets of K. pneumoniae which primarily correlate to the physiological response of host during K. pneumoniae-mediated sepsis.
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Affiliation(s)
- Deeya Saha
- Department of Biophysics, Molecular Biology and Bioinformatics, Faculty of Science, University of Calcutta, Kolkata, India
| | - Sudip Kundu
- Department of Biophysics, Molecular Biology and Bioinformatics, Faculty of Science, University of Calcutta, Kolkata, India
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11
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Lin WC, Fessler MB. Regulatory mechanisms of neutrophil migration from the circulation to the airspace. Cell Mol Life Sci 2021; 78:4095-4124. [PMID: 33544156 PMCID: PMC7863617 DOI: 10.1007/s00018-021-03768-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/22/2020] [Accepted: 01/16/2021] [Indexed: 02/07/2023]
Abstract
The neutrophil, a short-lived effector leukocyte of the innate immune system best known for its proteases and other degradative cargo, has unique, reciprocal physiological interactions with the lung. During health, large numbers of ‘marginated’ neutrophils reside within the pulmonary vasculature, where they patrol the endothelial surface for pathogens and complete their life cycle. Upon respiratory infection, rapid and sustained recruitment of neutrophils through the endothelial barrier, across the extravascular pulmonary interstitium, and again through the respiratory epithelium into the airspace lumen, is required for pathogen killing. Overexuberant neutrophil trafficking to the lung, however, causes bystander tissue injury and underlies several acute and chronic lung diseases. Due in part to the unique architecture of the lung’s capillary network, the neutrophil follows a microanatomic passage into the distal airspace unlike that observed in other end-organs that it infiltrates. Several of the regulatory mechanisms underlying the stepwise recruitment of circulating neutrophils to the infected lung have been defined over the past few decades; however, fundamental questions remain. In this article, we provide an updated review and perspective on emerging roles for the neutrophil in lung biology, on the molecular mechanisms that control the trafficking of neutrophils to the lung, and on past and ongoing efforts to design therapeutics to intervene upon pulmonary neutrophilia in lung disease.
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Affiliation(s)
- Wan-Chi Lin
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, 111 T.W. Alexander Drive, P.O. Box 12233, MD D2-01, Research Triangle Park, NC, 27709, USA
| | - Michael B Fessler
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, 111 T.W. Alexander Drive, P.O. Box 12233, MD D2-01, Research Triangle Park, NC, 27709, USA.
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12
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Ju Z, Shao J, Zhou M, Jin J, Pan H, Ding P, Huang R. Transcriptomic and metabolomic profiling reveal the p53-dependent benzeneacetic acid attenuation of silica-induced epithelial-mesenchymal transition in human bronchial epithelial cells. Cell Biosci 2021; 11:30. [PMID: 33546743 PMCID: PMC7866764 DOI: 10.1186/s13578-021-00545-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 01/22/2021] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Silica exposure underlies the development of silicosis, one of the most serious occupational hazards worldwide. We aimed to explore the interaction of the silica-induced epithelial-mesenchymal transition (EMT)-related transcripts with the cellular metabolism regulated by p53. METHODS We knocked out p53 using CRISPR/Cas9 in the human bronchial epithelial (HBE) cell line. The transcriptomic and metabolomic analyses and integrative omics were conducted using microarrays, GC-MS, and MetaboAnalyst, respectively. RESULTS Fifty-two mRNAs showed significantly altered expression in the HBE p53-KO cells post-silica exposure. A total of 42 metabolites were putatively involved in p53-dependent silica-mediated HBE cell dysfunction. Through integrated data analysis, we obtained five significant p53-dependent metabolic pathways including phenylalanine, glyoxylate, dicarboxylate, and linoleic acid metabolism, and the citrate cycle. Through metabolite screening, we further identified that benzeneacetic acid, a key regulation metabolite in the phenylalanine metabolic pathway, attenuated the silica-induced EMT in HBE cells in a p53-dependent manner. Interestingly, despite the extensive p53-related published literature, the clinical translation of these studies remains unsubstantial. CONCLUSIONS Our study offers new insights into the molecular mechanisms by which epithelial cells respond to silica exposure and provide fresh perspective and direction for future clinical biomarker research and potential clinically sustainable and translatable role of p53.
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Affiliation(s)
- Zhao Ju
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Jianlin Shao
- Zhejiang Provincial Center for Cardiovascular Disease Prevention and Control, Zhejiang Hospital, Hangzhou, Zhejiang, China
| | - Meiling Zhou
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Jing Jin
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Huiji Pan
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Ping Ding
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Ruixue Huang
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China.
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13
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Lim YJ, Lee J, Choi JA, Cho SN, Son SH, Kwon SJ, Son JW, Song CH. M1 macrophage dependent-p53 regulates the intracellular survival of mycobacteria. Apoptosis 2020; 25:42-55. [PMID: 31691131 PMCID: PMC6965052 DOI: 10.1007/s10495-019-01578-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Tumor suppressor p53 is not only affects immune responses but also contributes to antibacterial activity. However, its bactericidal function during mycobacterial infection remains unclear. In this study, we found that the p53-deficient macrophages failed to control Mycobacterium tuberculosis (Mtb), manifested as a lower apoptotic cell death rate and enhanced intracellular survival. The expression levels of p53 during Mtb infection were stronger in M1 macrophages than in M2 macrophages. The TLR2/JNK signaling pathway plays an essential role in the modulation of M1 macrophage polarization upon Mtb infection. It facilitates p53-mediated apoptosis through the production of reactive oxygen species, nitric oxide and inflammatory cytokines in Mtb-infected M1 macrophages. In addition, nutlin-3 effectively abrogated the intracellular survival of mycobacteria in both TB patients and healthy controls after H37Ra infection for 24 h, indicating that the enhancement of p53 production effectively suppressed the intracellular survival of Mtb in hosts. These results suggest that p53 can be a new therapeutic target for TB therapy.
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Affiliation(s)
- Yun-Ji Lim
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, 35015, South Korea.,Department of Medical Science, Chungnam National University, Daejeon, South Korea.,Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Junghwan Lee
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, 35015, South Korea.,Department of Medical Science, Chungnam National University, Daejeon, South Korea
| | - Ji-Ae Choi
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, 35015, South Korea.,Department of Medical Science, Chungnam National University, Daejeon, South Korea.,Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Soo-Na Cho
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, 35015, South Korea.,Department of Medical Science, Chungnam National University, Daejeon, South Korea
| | - Sang-Hun Son
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, 35015, South Korea.,Department of Medical Science, Chungnam National University, Daejeon, South Korea
| | - Sun-Jung Kwon
- Department of Internal Medicine, Konyang University Hospital, Daejeon, South Korea
| | - Ji-Woong Son
- Department of Internal Medicine, Konyang University Hospital, Daejeon, South Korea
| | - Chang-Hwa Song
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, 35015, South Korea. .,Department of Medical Science, Chungnam National University, Daejeon, South Korea. .,Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, South Korea.
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14
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Uddin MA, Barabutis N. P53 in the impaired lungs. DNA Repair (Amst) 2020; 95:102952. [PMID: 32846356 PMCID: PMC7437512 DOI: 10.1016/j.dnarep.2020.102952] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 08/13/2020] [Indexed: 12/12/2022]
Abstract
Our laboratory is focused on investigating the supportive role of P53 towards the maintenance of lung homeostasis. Acute lung injury, acute respiratory distress syndrome, chronic obstructive pulmonary disease, pulmonary fibrosis, bronchial asthma, pulmonary arterial hypertension, pneumonia and tuberculosis are respiratory pathologies, associated with dysfunctions of this endothelium defender (P53). Herein we review the evolving role of P53 towards the aforementioned inflammatory disorders, to potentially reveal new therapeutic possibilities in pulmonary disease.
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Affiliation(s)
- Mohammad A Uddin
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana 71201, USA
| | - Nektarios Barabutis
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana 71201, USA.
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15
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Wang X, Zhang H, Zhang T, Pan L, Dong K, Yang M, Ma R, Li Y. Etiology of Community-Acquired Pneumonia Requiring Hospital Admission in Adults with and Without Cancers: A Single-Center Retrospective Study in China. Infect Drug Resist 2020; 13:1607-1617. [PMID: 32606812 PMCID: PMC7294101 DOI: 10.2147/idr.s251564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 05/16/2020] [Indexed: 01/07/2023] Open
Abstract
Background The etiology and distribution of community-acquired pneumonia (CAP) vary periodically and geographically. The clinical evaluation of CAP among patients with cancers remains unknown. Patients and Methods This retrospective hospital-based study on adult CAP was conducted in Tang Du Hospital, China, from September 2018 to August 2019. The demographic characteristics, clinical manifestations and laboratory data were extracted from medical records and compared between CAP patients with and without cancers. Univariable and multivariable logistic regression methods were used to explore risk factors associated with CAP patients with and without cancers. Results Data from 149 CAP patients with cancers and 268 CAP patients without cancers were analyzed. Patients without cancers were more likely to show fever, cough and yellow sputum, higher level of neutrophil count than the cancer patients. Klebsiella pneumoniae (K. pneumoniae 14.77% vs 9.33%, p = 0.093) and Streptococcus pneumoniae (S. pneumoniae 16.11% vs 11.57%, p = 0.189) were among the most commonly encountered pathogens in both the groups. Pseudomonas aeruginosa (P. pneumoniae 26.50% vs 11.41%, p < 0.001), Mycoplasma pneumoniae (M. pneumoniae 8.21% vs 1.34%, p = 0.003), and filamentous fungi (10.82% vs 4.7%, p = 0.033) were predominant in CAP patients without cancers. Haemophilus influenzae (H. influenzae 22.15% vs 14.18%, p = 0.038) and methicillin-resistant Staphylococci (MRS 23.49 vs 15.68, p = 0.049) were more prevalent for CAP cancer patients. Certain pathogens were increasing in a cold season. In patients without cancers, MRS, H. influenzae and P. aeruginosa were associated with central nervous system (CNS) disease, connective tissue disease, bronchiectasis, respectively. In addition, healthy adults were likely to be infected with M. pneumoniae showing fever. Conclusion CAP patients with cancers had atypical clinical manifestations and showed no distinct increase in inflammatory markers. The predominant pathogens differed as well as similar between the CAP patients with and without cancers. Certain pathogens follow a seasonal pattern. CNS disease, connective tissue disease and bronchiectasis were associated with the predominant pathogens in patients without cancers.
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Affiliation(s)
- Xinxin Wang
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
| | - Haihua Zhang
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
| | - Tao Zhang
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
| | - Lei Pan
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
| | - Ke Dong
- Department of Laboratory, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
| | - Ming Yang
- Department of Laboratory, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
| | - Ruina Ma
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
| | - Yujuan Li
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Air Force Medical University, Xi'an, People's Republic of China
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16
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Ai Z, Udalova IA. Transcriptional regulation of neutrophil differentiation and function during inflammation. J Leukoc Biol 2020; 107:419-430. [PMID: 31951039 DOI: 10.1002/jlb.1ru1219-504rr] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 12/17/2019] [Accepted: 12/18/2019] [Indexed: 12/30/2022] Open
Abstract
Neutrophils are the most abundant leukocytes in innate immunity where they elicit powerful effector functions to eliminate invading pathogens and modulate the adaptive as well as the innate immune response. Neutrophil function must be tightly regulated during inflammation and infection to avoid additional tissue damage. Increasing evidence suggests that transcription factors (TFs) function as key regulators to modulate transcriptional output, thereby controlling cell fate decision and the inflammatory responses. However, the molecular mechanisms underlying neutrophil differentiation and function during inflammation remain largely uncharacterized. Here, we provide a comprehensive overview of TFs known to be crucial for neutrophil maturation and in the signaling pathways that control neutrophil differentiation and activation. We also outline how emerging genomic and single-cell technologies may facilitate further discovery of neutrophil transcriptional regulators.
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Affiliation(s)
- Zhichao Ai
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Irina A Udalova
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
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17
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Tran TM, Guha R, Portugal S, Skinner J, Ongoiba A, Bhardwaj J, Jones M, Moebius J, Venepally P, Doumbo S, DeRiso EA, Li S, Vijayan K, Anzick SL, Hart GT, O'Connell EM, Doumbo OK, Kaushansky A, Alter G, Felgner PL, Lorenzi H, Kayentao K, Traore B, Kirkness EF, Crompton PD. A Molecular Signature in Blood Reveals a Role for p53 in Regulating Malaria-Induced Inflammation. Immunity 2019; 51:750-765.e10. [PMID: 31492649 DOI: 10.1016/j.immuni.2019.08.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 06/19/2019] [Accepted: 08/08/2019] [Indexed: 01/15/2023]
Abstract
Immunity that controls parasitemia and inflammation during Plasmodium falciparum (Pf) malaria can be acquired with repeated infections. A limited understanding of this complex immune response impedes the development of vaccines and adjunctive therapies. We conducted a prospective systems biology study of children who differed in their ability to control parasitemia and fever following Pf infection. By integrating whole-blood transcriptomics, flow-cytometric analysis, and plasma cytokine and antibody profiles, we demonstrate that a pre-infection signature of B cell enrichment, upregulation of T helper type 1 (Th1) and Th2 cell-associated pathways, including interferon responses, and p53 activation associated with control of malarial fever and coordinated with Pf-specific immunoglobulin G (IgG) and Fc receptor activation to control parasitemia. Our hypothesis-generating approach identified host molecules that may contribute to differential clinical outcomes during Pf infection. As a proof of concept, we have shown that enhanced p53 expression in monocytes attenuated Plasmodium-induced inflammation and predicted protection from fever.
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Affiliation(s)
- Tuan M Tran
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA; Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Ryan White Center for Pediatric Infectious Disease and Global Health, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
| | - Rajan Guha
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA
| | - Silvia Portugal
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA; Center for Infectious Diseases-Parasitology, Heidelberg University Hospital, Heidelberg 69120, Germany
| | - Jeff Skinner
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA
| | - Aissata Ongoiba
- Mali International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, BP 1805, Point G, Bamako, Mali
| | - Jyoti Bhardwaj
- Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Ryan White Center for Pediatric Infectious Disease and Global Health, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Marcus Jones
- Genomic Medicine Group, J. Craig Venter Institute, Rockville, MD 20850, USA
| | - Jacqueline Moebius
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA
| | - Pratap Venepally
- Genomic Medicine Group, J. Craig Venter Institute, Rockville, MD 20850, USA
| | - Safiatou Doumbo
- Mali International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, BP 1805, Point G, Bamako, Mali
| | - Elizabeth A DeRiso
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology, and Harvard University, Cambridge, MA 02139, USA
| | - Shanping Li
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA
| | - Kamalakannan Vijayan
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Sarah L Anzick
- Rocky Mountain Laboratories, Genomics Unit, National Institute of Allergy and Infectious Diseases, NIH, Hamilton, MT 59840, USA
| | - Geoffrey T Hart
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA; Division of Infectious Disease and International Medicine, Department of Medicine, Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Elise M O'Connell
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
| | - Ogobara K Doumbo
- Mali International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, BP 1805, Point G, Bamako, Mali
| | - Alexis Kaushansky
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Galit Alter
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology, and Harvard University, Cambridge, MA 02139, USA
| | - Phillip L Felgner
- Division of Infectious Diseases, School of Medicine, University of California, Irvine, Irvine, CA 92697, USA
| | - Hernan Lorenzi
- Department of Infectious Diseases, J. Craig Venter Institute, Rockville, MD 20850, USA
| | - Kassoum Kayentao
- Mali International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, BP 1805, Point G, Bamako, Mali
| | - Boubacar Traore
- Mali International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, BP 1805, Point G, Bamako, Mali
| | - Ewen F Kirkness
- Genomic Medicine Group, J. Craig Venter Institute, Rockville, MD 20850, USA
| | - Peter D Crompton
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA.
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18
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Valvani A, Martin A, Devarajan A, Chandy D. Postobstructive pneumonia in lung cancer. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:357. [PMID: 31516903 DOI: 10.21037/atm.2019.05.26] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Postobstructive pneumonia can complicate lung cancer, particularly in more advanced stages of the disease, producing significant clinical decline and a poorer prognosis. It can lead to complications such as empyema, lung abscess and fistula formation. Postobstructive pneumonia can also be the first manifestation of an underlying malignancy. There are multiple challenges in the management of these patients. Recognition and treatment of this entity can be complex and includes the use of imaging, administration of broad-spectrum antibiotics to cover the wide variety of microorganisms involved and the use of different interventional modalities to relieve the obstruction. Existing literature on postobstructive pneumonia is scarce. In this article, we review the pathophysiology, different diagnostic methods and the therapeutic options to treat this condition. The utility and efficacy of the various modalities that are currently available in clinical practice to the interventional pulmonologist are described in some detail.
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Affiliation(s)
- Aashish Valvani
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Westchester Medical Center, Valhalla, NY, USA
| | - Alvaro Martin
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Westchester Medical Center, Valhalla, NY, USA
| | - Anusha Devarajan
- Department of Medicine, Westchester Medical Center, Valhalla, NY, USA
| | - Dipak Chandy
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Westchester Medical Center, Valhalla, NY, USA
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19
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Regulation of autoimmune disease by the E3 ubiquitin ligase Itch. Cell Immunol 2019; 340:103916. [PMID: 31126634 DOI: 10.1016/j.cellimm.2019.04.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 04/03/2019] [Indexed: 12/14/2022]
Abstract
Itch is a HECT type E3 ubiquitin ligase that is required to prevent the development of autoimmune disease in both mice and humans. Itch is expressed in most mammalian cell types, and, based on published data, it regulates many cellular pathways ranging from T cell differentiation to liver tumorigenesis. Since 1998, when Itch was first discovered, hundreds of publications have described mechanisms through which Itch controls various biologic activities in both immune and non-immune cells. Other studies have provided insight into how Itch catalytic activity is regulated. However, while autoimmunity is the primary clinical feature that occurs in both mice and humans lacking Itch, and Itch control of immune cell function has been well-studied, it remains unclear how Itch prevents the emergence of autoimmune disease. In this review, we explore recent discoveries that advance our understanding of how Itch regulates immune cell biology, and the extent to which these clarify how Itch prevents autoimmune disease. Additionally, we discuss how molecular regulators of Itch impact its ability to control these processes, as this may provide clues on how to therapeutically target Itch to treat patients with autoimmune disease.
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20
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George L, Ramasamy T, Sirajudeen KNS, Manickam V. LPS-induced Apoptosis is Partially Mediated by Hydrogen Sulphide in RAW 264.7 Murine Macrophages. Immunol Invest 2019; 48:451-465. [DOI: 10.1080/08820139.2019.1566355] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Leema George
- School BioSciences and Technology, Vellore Institute of Technology, VIT University, Vellore, India
| | - Tamizhselvi Ramasamy
- School BioSciences and Technology, Vellore Institute of Technology, VIT University, Vellore, India
| | - KNS Sirajudeen
- Department of Chemical Pathology, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - Venkatraman Manickam
- School BioSciences and Technology, Vellore Institute of Technology, VIT University, Vellore, India
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21
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Martins R, Carlos AR, Braza F, Thompson JA, Bastos-Amador P, Ramos S, Soares MP. Disease Tolerance as an Inherent Component of Immunity. Annu Rev Immunol 2019; 37:405-437. [PMID: 30673535 DOI: 10.1146/annurev-immunol-042718-041739] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Pathogenic organisms exert a negative impact on host health, revealed by the clinical signs of infectious diseases. Immunity limits the severity of infectious diseases through resistance mechanisms that sense and target pathogens for containment, killing, or expulsion. These resistance mechanisms are viewed as the prevailing function of immunity. Under pathophysiologic conditions, however, immunity arises in response to infections that carry health and fitness costs to the host. Therefore, additional defense mechanisms are required to limit these costs, before immunity becomes operational as well as thereafter to avoid immunopathology. These are tissue damage control mechanisms that adjust the metabolic output of host tissues to different forms of stress and damage associated with infection. Disease tolerance is the term used to define this defense strategy, which does not exert a direct impact on pathogens but is essential to limit the health and fitness costs of infection. Under this argument, we propose that disease tolerance is an inherent component of immunity.
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Affiliation(s)
- Rui Martins
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal;
| | | | - Faouzi Braza
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal;
| | | | | | - Susana Ramos
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal;
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22
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Dickinson SE, Wondrak GT. TLR4-directed Molecular Strategies Targeting Skin Photodamage and Carcinogenesis. Curr Med Chem 2019; 25:5487-5502. [DOI: 10.2174/0929867324666170828125328] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/30/2017] [Accepted: 06/30/2017] [Indexed: 01/16/2023]
Abstract
Background:
Exposure to solar ultraviolet (UV) radiation is a causative factor in
skin photodamage and carcinogenesis, and inflammatory dysregulation is a key mechanism
underlying detrimental effects of acute and chronic UV exposure. The health and economic
burden of skin cancer treatment is substantial, creating an increasingly urgent need for the development
of improved molecular strategies for photoprotection and photochemoprevention.
Methods:
A structured search of bibliographic databases for peer-reviewed research literature
revealed 139 articles including our own that are presented and critically evaluated in this
TLR4-directed review.
Objective:
To understand the molecular role of Toll-like receptor 4 (TLR4) as a key regulator
of skin anti-microbial defense, wound healing, and cutaneous tumorigenic inflammation. The
specific focus of this review is on recent published evidence suggesting that TLR4 represents
a novel molecular target for skin photoprotection and cancer photochemoprevention.
Results:
Cumulative experimental evidence indicates that pharmacological and genetic antagonism
of TLR4 suppresses UV-induced inflammatory signaling involving the attenuation
of cutaneous NF-κB and AP-1 stress signaling observable in vitro and in vivo. TLR4-directed
small molecule pharmacological antagonists [including eritoran, (+)-naloxone, ST2825, and
resatorvid] have now been identified as a novel class of molecular therapeutics. TLR4 antagonists
are in various stages of preclinical and clinical development for the modulation of
dysregulated TLR4-dependent inflammatory signaling that may also contribute to skin photodamage
and photocarcinogenesis in human populations.
Conclusion:
Future research should explore the skin photoprotective and photochemopreventive
efficacy of topical TLR4 antagonism if employed in conjunction with other molecular
strategies including sunscreens.
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Affiliation(s)
- Sally E. Dickinson
- Department of Pharmacology, College of Medicine and The University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, United States
| | - Georg T. Wondrak
- Department of Pharmacology and Toxicology, College of Pharmacy and The University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, United States
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23
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Aloor JJ, Azzam KM, Guardiola JJ, Gowdy KM, Madenspacher JH, Gabor KA, Mueller GA, Lin WC, Lowe JM, Gruzdev A, Henderson MW, Draper DW, Merrick BA, Fessler MB. Leucine-rich repeats and calponin homology containing 4 (Lrch4) regulates the innate immune response. J Biol Chem 2018; 294:1997-2008. [PMID: 30523158 DOI: 10.1074/jbc.ra118.004300] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 11/27/2018] [Indexed: 01/07/2023] Open
Abstract
Toll-like receptors (TLRs) are pathogen-recognition receptors that trigger the innate immune response. Recent reports have identified accessory proteins that provide essential support to TLR function through ligand delivery and receptor trafficking. Herein, we introduce leucine-rich repeats (LRRs) and calponin homology containing 4 (Lrch4) as a novel TLR accessory protein. Lrch4 is a membrane protein with nine LRRs in its predicted ectodomain. It is widely expressed across murine tissues and has two expression variants that are both regulated by lipopolysaccharide (LPS). Predictive modeling indicates that Lrch4 LRRs conform to the horseshoe-shaped structure typical of LRRs in pathogen-recognition receptors and that the best structural match in the protein database is to the variable lymphocyte receptor of the jawless vertebrate hagfish. Silencing Lrch4 attenuates cytokine induction by LPS and multiple other TLR ligands and dampens the in vivo innate immune response. Lrch4 promotes proper docking of LPS in lipid raft membrane microdomains. We provide evidence that this is through regulation of lipid rafts as Lrch4 silencing reduces cell surface gangliosides, a metric of raft abundance, as well as expression and surface display of CD14, a raft-resident LPS co-receptor. Taken together, we identify Lrch4 as a broad-spanning regulator of the innate immune response and a potential molecular target in inflammatory disease.
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Affiliation(s)
- Jim J Aloor
- From the Immunity, Inflammation and Disease Laboratory
| | | | | | | | | | | | | | - Wan-Chi Lin
- From the Immunity, Inflammation and Disease Laboratory
| | - Julie M Lowe
- From the Immunity, Inflammation and Disease Laboratory
| | | | | | | | - B Alex Merrick
- National Toxicology Program, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
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24
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Teixeira RB, Barboza TE, DE Araujo CC, Siqueira R, DE Castro AL, Bonetto JHP, DE Lima-Seolin BG, Carraro CC, Bello-Klein A, Singal PK, Araujo ASDAR. Decreased PGC1- α levels and increased apoptotic protein signaling are associated with the maladaptive cardiac hypertrophy in hyperthyroidism. J Biosci 2018; 43:887-895. [PMID: 30541949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hyperthyroidism can lead to the activation of proteins which are associated with inflammation, apoptosis, hypertrophy, and heart failure. This study aimed to explore the inflammatory and apoptotic proteins involved in the hyperthyroidism-induced cardiac hypertrophy establishment. Male Wistar rats were divided into control and hyperthyroid (12 mg/L L-thyroxine, in drinking water for 28 days) groups. The expression of inflammatory and apoptotic signaling proteins was quantified in the left ventricle by Western blot. Hyperthyroidism was confirmed by evaluation of T3 and T4 levels, as well as cardiac hypertrophy development. There was no change in the expression of HSP70, HIF1-α, TNF-α, MyD88, p-NFκB, NFκB, p-p38, and p38. Reduced expression of p53 and PGC1-α was associated with increased TLR4 and decreased IL-10 expression. Decreased Bcl-2 expression and increased Bax/Bcl-2 ratio were also observed. The results suggest that reduced PGC1-α and IL-10, and elevated TLR4 proteins expression could be involved with the diminished mitochondrial biogenesis and anti-inflammatory response, as well as cell death signaling, in the establishment of hyperthyroidism-induced maladaptive cardiac hypertrophy.
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Affiliation(s)
- Rayane Brinck Teixeira
- Laboratorio de Fisiologia Cardiovascular, Departamento de Fisiologia, Instituto de Ciencias Basicas da Saude, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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25
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Duke KS, Thompson EA, Ihrie MD, Taylor-Just AJ, Ash EA, Shipkowski KA, Hall JR, Tokarz DA, Cesta MF, Hubbs AF, Porter DW, Sargent LM, Bonner JC. Role of p53 in the chronic pulmonary immune response to tangled or rod-like multi-walled carbon nanotubes. Nanotoxicology 2018; 12:975-991. [PMID: 30317900 DOI: 10.1080/17435390.2018.1502830] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The fiber-like shape of multi-walled carbon nanotubes (MWCNTs) is reminiscent of asbestos, suggesting they pose similar health hazards when inhaled, including pulmonary fibrosis and mesothelioma. Mice deficient in the tumor suppressor p53 are susceptible to carcinogenesis. However, the chronic pathologic effect of MWCNTs delivered to the lungs of p53 heterozygous (p53+/-) mice has not been investigated. We hypothesized that p53+/- mice would be susceptible to lung tumor development after exposure to either tangled (t-) or rod-like (r-) MWCNTs. Wild-type (p53+/+) or p53+/- mice were exposed to MWCNTs (1 mg/kg) via oropharyngeal aspiration weekly over four consecutive weeks and evaluated for cellular and pathologic outcomes 11-months post-initial exposure. No lung or pleural tumors were observed in p53+/+ or p53+/- mice exposed to either t- or rMWCNTs. In comparison to tMWCNTs, the rMWCNTs induced the formation of larger granulomas, a greater number of lymphoid aggregates and greater epithelial cell hyperplasia in terminal bronchioles in both p53+/- and p53+/+ mice. A constitutively larger area of CD45R+/CD3+ lymphoid tissue was observed in p53+/- mice compared to p53+/+ mice. Importantly, p53+/- mice had larger granulomas induced by rMWCNTs as compared to p53+/+ mice. These findings indicate that a combination of p53 deficiency and physicochemical characteristics including nanotube geometry are factors in susceptibility to MWCNT-induced lymphoid infiltration and granuloma formation.
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Affiliation(s)
- Katherine S Duke
- a Department of Biological Sciences , North Carolina State University , Raleigh , NC , USA
| | - Elizabeth A Thompson
- a Department of Biological Sciences , North Carolina State University , Raleigh , NC , USA
| | - Mark D Ihrie
- a Department of Biological Sciences , North Carolina State University , Raleigh , NC , USA
| | - Alexia J Taylor-Just
- a Department of Biological Sciences , North Carolina State University , Raleigh , NC , USA
| | - Elizabeth A Ash
- b College of Veterinary Medicine , North Carolina State University , Raleigh , NC , USA
| | - Kelly A Shipkowski
- a Department of Biological Sciences , North Carolina State University , Raleigh , NC , USA
| | - Jonathan R Hall
- a Department of Biological Sciences , North Carolina State University , Raleigh , NC , USA
| | - Debra A Tokarz
- b College of Veterinary Medicine , North Carolina State University , Raleigh , NC , USA
| | - Mark F Cesta
- c National Institute of Environmental Health Sciences , Research Triangle Park , NC , USA
| | - Ann F Hubbs
- d National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Dale W Porter
- d National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Linda M Sargent
- d National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - James C Bonner
- a Department of Biological Sciences , North Carolina State University , Raleigh , NC , USA
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26
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Decreased PGC1-α levels and increased apoptotic protein signaling are associated with the maladaptive cardiac hypertrophy in hyperthyroidism. J Biosci 2018. [DOI: 10.1007/s12038-018-9816-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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27
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Abstract
A number of recent epidemiological studies have associated the clonal expansion of hematopoietic cells, a process referred to as clonal hematopoiesis, with increased mortality. Clonal hematopoiesis increases the risk of hematological cancer, but this overall risk cannot account for the increase in mortality in the general population. Surprisingly, these mutations have also been associated with higher rates of cardiovascular disease, suggesting a previously unrecognized link between somatic mutations in hematopoietic cells and chronic disease. Here, we review recent epidemiological and experimental studies on clonal hematopoiesis that relate to cardiovascular disease.
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Affiliation(s)
- Soichi Sano
- Hematovascular Biology Center, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine
| | - Ying Wang
- Hematovascular Biology Center, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine
| | - Kenneth Walsh
- Hematovascular Biology Center, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine
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28
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Kastenhuber ER, Lowe SW. Putting p53 in Context. Cell 2017; 170:1062-1078. [PMID: 28886379 DOI: 10.1016/j.cell.2017.08.028] [Citation(s) in RCA: 1156] [Impact Index Per Article: 165.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/09/2017] [Accepted: 08/15/2017] [Indexed: 02/06/2023]
Abstract
TP53 is the most frequently mutated gene in human cancer. Functionally, p53 is activated by a host of stress stimuli and, in turn, governs an exquisitely complex anti-proliferative transcriptional program that touches upon a bewildering array of biological responses. Despite the many unveiled facets of the p53 network, a clear appreciation of how and in what contexts p53 exerts its diverse effects remains unclear. How can we interpret p53's disparate activities and the consequences of its dysfunction to understand how cell type, mutation profile, and epigenetic cell state dictate outcomes, and how might we restore its tumor-suppressive activities in cancer?
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Affiliation(s)
- Edward R Kastenhuber
- Department of Cancer Biology and Genetics, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Louis V. Gerstner Jr. Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Scott W Lowe
- Department of Cancer Biology and Genetics, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Howard Hughes Medical Institute, New York, NY 10065, USA.
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29
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Antony VB, Redlich CA, Pinkerton KE, Balmes J, Harkema JR. National Institute of Environmental Health Sciences: 50 Years of Advancing Science and Improving Lung Health. Am J Respir Crit Care Med 2017; 194:1190-1195. [PMID: 27668911 DOI: 10.1164/rccm.201608-1645pp] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The American Thoracic Society celebrates the 50th anniversary of the National Institute of Environmental Health Sciences (NIEHS). The NIEHS has had enormous impact through its focus on research, training, and translational science on lung health. It has been an advocate for clean air both in the United States and across the world. The cutting-edge science funded by the NIEHS has led to major discoveries that have broadened our understanding of the pathogenesis and treatment for lung disease. Importantly, the NIEHS has developed and fostered mechanisms that require cross-cutting science across the spectrum of areas of inquiry, bringing together environmental and social scientists with clinicians to bring their expertise on specific areas of investigation. The intramural program of the NIEHS nurtures cutting-edge science, and the extramural program encourages investigator-initiated research while at the same time providing broader direction through important initiatives. Under the umbrella of the NIEHS and guided by Dr. Linda Birnbaum, the director of the NIEHS, important collaborative programs, such as the Superfund Program and the National Toxicology Program, work to discover mechanisms to protect from environmental toxins. The American Thoracic Society has overlapping goals with the NIEHS, and the strategic plans of both august bodies converge to synergize on population lung health. These bonds must be tightened and highlighted as we work toward our common goals.
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Affiliation(s)
- Veena B Antony
- 1 Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, The University of Alabama at Birmingham, Birmingham, Alabama
| | - Carrie A Redlich
- 2 Occupational and Environmental Medicine, Internal Medicine, Yale School of Medicine, New Haven, Connecticut
| | - Kent E Pinkerton
- 3 School of Veterinary Medicine, University of California Davis, Davis, California
| | - John Balmes
- 4 Occupational and Environmental Medicine, Department of Medicine, University of California San Francisco, San Francisco, California; and
| | - Jack R Harkema
- 5 Department of Pathology and Diagnostic Investigation, Michigan State University, East Lansing, Michigan
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30
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Abstract
Bacterial pneumonias exact unacceptable morbidity on patients with cancer. Although the risk is often most pronounced among patients with treatment-induced cytopenias, the numerous contributors to life-threatening pneumonias in cancer populations range from derangements of lung architecture and swallow function to complex immune defects associated with cytotoxic therapies and graft-versus-host disease. These structural and immunologic abnormalities often make the diagnosis of pneumonia challenging in patients with cancer and impact the composition and duration of therapy. This article addresses host factors that contribute to pneumonia susceptibility, summarizes diagnostic recommendations, and reviews current guidelines for management of bacterial pneumonia in patients with cancer.
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Affiliation(s)
- Justin L Wong
- Division of Internal Medicine, Department of Pulmonary, Critical Care and Sleep Medicine, The University of Texas Health Sciences Center, 6431 Fannin Street, MSB 1.434, Houston, TX 77030, USA
| | - Scott E Evans
- Division of Internal Medicine, Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 1100, Houston, TX 77030, USA.
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31
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32
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Gudkov AV, Komarova EA. p53 and the Carcinogenicity of Chronic Inflammation. Cold Spring Harb Perspect Med 2016; 6:cshperspect.a026161. [PMID: 27549311 DOI: 10.1101/cshperspect.a026161] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Chronic inflammation is a major cancer predisposition factor. Constitutive activation of the inflammation-driving NF-κB pathway commonly observed in cancer or developed in normal tissues because of persistent infections or endogenous tissue irritating factors, including products of secretion by senescent cells accumulating with age, markedly represses p53 functions. In its turn, p53 acts as a suppressor of inflammation helping to keep it within safe limits. The antagonistic relationship between p53 and NF-κB is controlled by multiple mechanisms and reflects cardinal differences in organismal responses to intrinsic and extrinsic cell stresses driven by these two transcription factors, respectively. This provides an opportunity for developing drugs to treat diseases associated with inappropriate activity of either p53 or NF-κB through targeting the opposing pathway. Several drug candidates of this kind are currently in clinical testing. These include anticancer small molecules capable of simultaneous suppression of p53 and activation of NF-κB and NF-κB-activating biologics that counteract p53-mediated pathologies associated with systemic genotoxic stresses such as acute radiation syndrome and side effects of cancer treatment.
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Affiliation(s)
- Andrei V Gudkov
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, New York 14263
| | - Elena A Komarova
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, New York 14263
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33
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Neves-Costa A, Moita LF. Modulation of inflammation and disease tolerance by DNA damage response pathways. FEBS J 2016; 284:680-698. [PMID: 27686576 DOI: 10.1111/febs.13910] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/12/2016] [Accepted: 09/27/2016] [Indexed: 12/20/2022]
Abstract
The accurate replication and repair of DNA is central to organismal survival. This process is challenged by the many factors that can change genetic information such as replication errors and direct damage to the DNA molecule by chemical and physical agents. DNA damage can also result from microorganism invasion as an integral step of their life cycle or as collateral damage from host defense mechanisms against pathogens. Here we review the complex crosstalk of DNA damage response and immune response pathways that might be evolutionarily connected and argue that DNA damage response pathways can be explored therapeutically to induce disease tolerance through the activation of tissue damage control processes. Such approach may constitute the missing pillar in the treatment of critical illnesses caused by multiple organ failure, such as sepsis and septic shock.
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Affiliation(s)
| | - Luis F Moita
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
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34
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Speen AM, Kim HYH, Bauer RN, Meyer M, Gowdy KM, Fessler MB, Duncan KE, Liu W, Porter NA, Jaspers I. Ozone-derived Oxysterols Affect Liver X Receptor (LXR) Signaling: A POTENTIAL ROLE FOR LIPID-PROTEIN ADDUCTS. J Biol Chem 2016; 291:25192-25206. [PMID: 27703007 DOI: 10.1074/jbc.m116.732362] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 09/14/2016] [Indexed: 12/25/2022] Open
Abstract
When inhaled, ozone (O3) interacts with cholesterols of airway epithelial cell membranes or the lung-lining fluid, generating chemically reactive oxysterols. The mechanism by which O3-derived oxysterols affect molecular function is unknown. Our data show that in vitro exposure of human bronchial epithelial cells to O3 results in the formation of oxysterols, epoxycholesterol-α and -β and secosterol A and B (Seco A and Seco B), in cell lysates and apical washes. Similarly, bronchoalveolar lavage fluid obtained from human volunteers exposed to O3 contained elevated levels of these oxysterol species. As expected, O3-derived oxysterols have a pro-inflammatory effect and increase NF-κB activity. Interestingly, expression of the cholesterol efflux pump ATP-binding cassette transporter 1 (ABCA1), which is regulated by activation of the liver X receptor (LXR), was suppressed in epithelial cells exposed to O3 Additionally, exposure of LXR knock-out mice to O3 enhanced pro-inflammatory cytokine production in the lung, suggesting LXR inhibits O3-induced inflammation. Using alkynyl surrogates of O3-derived oxysterols, our data demonstrate adduction of LXR with Seco A. Similarly, supplementation of epithelial cells with alkynyl-tagged cholesterol followed by O3 exposure causes observable lipid-LXR adduct formation. Experiments using Seco A and the LXR agonist T0901317 (T09) showed reduced expression of ABCA1 as compared with stimulation with T0901317 alone, indicating that Seco A-LXR protein adduct formation inhibits LXR activation by traditional agonists. Overall, these data demonstrate that O3-derived oxysterols have pro-inflammatory functions and form lipid-protein adducts with LXR, thus leading to suppressed cholesterol regulatory gene expression and providing a biochemical mechanism mediating O3-derived formation of oxidized lipids in the airways and subsequent adverse health effects.
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Affiliation(s)
- Adam M Speen
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Hye-Young H Kim
- the Department of Chemistry and Center for Molecular Toxicology, Vanderbilt University, Nashville, Tennessee 37235
| | - Rebecca N Bauer
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Megan Meyer
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Kymberly M Gowdy
- the Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, North Carolina 27834, and
| | - Michael B Fessler
- the Immunity, Inflammation, and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Kelly E Duncan
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Wei Liu
- the Department of Chemistry and Center for Molecular Toxicology, Vanderbilt University, Nashville, Tennessee 37235
| | - Ned A Porter
- the Department of Chemistry and Center for Molecular Toxicology, Vanderbilt University, Nashville, Tennessee 37235
| | - Ilona Jaspers
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599,
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Jin HS, Kim TS, Jo EK. Emerging roles of orphan nuclear receptors in regulation of innate immunity. Arch Pharm Res 2016; 39:1491-1502. [PMID: 27699647 DOI: 10.1007/s12272-016-0841-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 09/23/2016] [Indexed: 01/25/2023]
Abstract
Innate immunity constitutes the first line of defense against pathogenic and dangerous insults. However, it is a double-edged sword, as it functions in both clearance of infection and inflammatory damage. It is therefore important that innate immune responses are tightly controlled to prevent harmful excessive inflammation. Nuclear receptors (NRs) are a family of transcription factors that play critical roles in various physiological responses. Orphan NRs are a subset of NRs for which the ligands and functions are unclear. Accumulating evidence has revealed that orphan NRs play essential roles in innate immune responses to prevent pathogenic inflammatory responses and to enhance antimicrobial host defenses. In this review, we describe current knowledge on the roles and mechanisms of orphan NRs in the regulation of innate immune responses. Discovery of new functions of orphan NRs would facilitate development of novel preventive and therapeutic strategies against human inflammatory diseases.
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Affiliation(s)
- Hyo Sun Jin
- Department of Microbiology, Department of Medical Science, Chungnam National University School of Medicine, 6 Munhwa-dong, Jungku, Daejeon, 301-747, South Korea
| | - Tae Sung Kim
- Department of Microbiology, Department of Medical Science, Chungnam National University School of Medicine, 6 Munhwa-dong, Jungku, Daejeon, 301-747, South Korea
| | - Eun-Kyeong Jo
- Department of Microbiology, Department of Medical Science, Chungnam National University School of Medicine, 6 Munhwa-dong, Jungku, Daejeon, 301-747, South Korea.
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36
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Madenspacher JH, Fessler MB. A Non-invasive and Technically Non-intensive Method for Induction and Phenotyping of Experimental Bacterial Pneumonia in Mice. J Vis Exp 2016. [PMID: 27768086 DOI: 10.3791/54508] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Although community-acquired pneumonia remains a major public health problem, murine models of bacterial pneumonia have recently facilitated significant preclinical advances in our understanding of the underlying cellular and molecular pathogenesis. In vivo mouse models capture the integrated physiology and resilience of the host defense response in a manner not revealed by alternative, simplified ex vivo approaches. Several methods have been described in the literature for intrapulmonary inoculation of bacteria in mice, including aerosolization, intranasal delivery, peroral endotracheal cannulation under 'blind' and visualized conditions, and transcutaneous endotracheal cannulation. All methods have relative merits and limitations. Herein, we describe in detail a non-invasive, technically non-intensive, inexpensive, and rapid method for intratracheal delivery of bacteria that involves aspiration (i.e., inhalation) by the mouse of an infectious inoculum pipetted into the oropharynx while under general anesthesia. This method can be used for pulmonary delivery of a wide variety of non-caustic biological and chemical agents, and is relatively easy to learn, even for laboratories with minimal prior experience with pulmonary procedures. In addition to describing the aspiration pneumonia method, we also provide step-by-step procedures for assaying the subsequent in vivo pulmonary innate immune response of the mouse, in particular, methods for quantifying bacterial clearance and the cellular immune response of the infected airway. This integrated and simple approach to pneumonia assessment allows for rapid and robust evaluation of the effect of genetic and environmental manipulations upon pulmonary innate immunity.
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Affiliation(s)
- Jennifer H Madenspacher
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health
| | - Michael B Fessler
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health;
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Muñoz-Fontela C, Mandinova A, Aaronson SA, Lee SW. Emerging roles of p53 and other tumour-suppressor genes in immune regulation. Nat Rev Immunol 2016; 16:741-750. [PMID: 27667712 DOI: 10.1038/nri.2016.99] [Citation(s) in RCA: 233] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tumour-suppressor genes are indispensable for the maintenance of genomic integrity. Recently, several of these genes, including those encoding p53, PTEN, RB1 and ARF, have been implicated in immune responses and inflammatory diseases. In particular, the p53 tumour- suppressor pathway is involved in crucial aspects of tumour immunology and in homeostatic regulation of immune responses. Other studies have identified roles for p53 in various cellular processes, including metabolism and stem cell maintenance. Here, we discuss the emerging roles of p53 and other tumour-suppressor genes in tumour immunology, as well as in additional immunological settings, such as virus infection. This relatively unexplored area could yield important insights into the homeostatic control of immune cells in health and disease and facilitate the development of more effective immunotherapies. Consequently, tumour-suppressor genes are emerging as potential guardians of immune integrity.
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Affiliation(s)
- César Muñoz-Fontela
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Martinistrasse 52, 20251 Hamburg, Germany
| | - Anna Mandinova
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Building 149 13th Street, Charlestown, Massachusetts 02129, USA.,Harvard Stem Cell Institute, 7 Divinity Avenue, Cambridge, Massachusetts 02138, USA.,Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, USA
| | - Stuart A Aaronson
- Department of Oncological Sciences, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, New York 10029, USA
| | - Sam W Lee
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Building 149 13th Street, Charlestown, Massachusetts 02129, USA.,Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, USA
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Wang S, Liu P, Wei J, Zhu Z, Shi Z, Shao D, Ma Z. Tumor suppressor p53 protects mice against Listeria monocytogenes infection. Sci Rep 2016; 6:33815. [PMID: 27644341 PMCID: PMC5028743 DOI: 10.1038/srep33815] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 09/02/2016] [Indexed: 02/07/2023] Open
Abstract
Tumor suppressor p53 is involved in regulating immune responses, which contribute to antitumor and antiviral activity. However, whether p53 has anti-bacterial functions remains unclear. Listeria monocytogenes (LM) causes listeriosis in humans and animals, and it is a powerful model for studying innate and adaptive immunity. In the present study, we illustrate an important regulatory role of p53 during LM infection. p53 knockout (p53KO) mice were more susceptible to LM infection, which was manifested by a shorter survival time and lower survival rate. p53KO mice showed significant impairments in LM eradication. Knockdown of p53 in RAW264.7 and HeLa cells resulted in increased invasion and intracellular survival of LM. Furthermore, the invasion and intracellular survival of LM was inhibited in p53-overexpressing RAW264.7 and HeLa cells. LM-infected p53KO mice exhibited severe clinical symptoms and organ injury, presumably because of the abnormal production of the pro-inflammatory cytokines TNF-α, IL-6, IL-12, and IL-18. Decreased IFN-γ and GBP1 productions were observed in LM-infected p53-deficient mice or cells. The combination of these defects likely resulted in the overwhelming LM infection in the p53KO mice. These observations indicate that p53 serves as an important regulator of the host innate immune that protects against LM infection.
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Affiliation(s)
- Shaohui Wang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China
| | - Pingping Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China
| | - Jianchao Wei
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China
| | - Zixiang Zhu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.,State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Zixue Shi
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China
| | - Donghua Shao
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China
| | - Zhiyong Ma
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China
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39
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Lai L, Azzam KM, Lin WC, Rai P, Lowe JM, Gabor KA, Madenspacher JH, Aloor JJ, Parks JS, Näär AM, Fessler MB. MicroRNA-33 Regulates the Innate Immune Response via ATP Binding Cassette Transporter-mediated Remodeling of Membrane Microdomains. J Biol Chem 2016; 291:19651-60. [PMID: 27471270 DOI: 10.1074/jbc.m116.723056] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Indexed: 01/07/2023] Open
Abstract
MicroRNAs (miRNAs) are short non-coding RNAs that regulate gene expression by promoting degradation and/or repressing translation of specific target mRNAs. Several miRNAs have been identified that regulate the amplitude of the innate immune response by directly targeting Toll-like receptor (TLR) pathway members and/or cytokines. miR-33a and miR-33b (the latter present in primates but absent in rodents and lower species) are located in introns of the sterol regulatory element-binding protein (SREBP)-encoding genes and control cholesterol/lipid homeostasis in concert with their host gene products. These miRNAs regulate macrophage cholesterol by targeting the lipid efflux transporters ATP binding cassette (ABC)A1 and ABCG1. We and others have previously reported that Abca1(-/-) and Abcg1(-/-) macrophages have increased TLR proinflammatory responses due to augmented lipid raft cholesterol. Given this, we hypothesized that miR-33 would augment TLR signaling in macrophages via a raft cholesterol-dependent mechanism. Herein, we report that multiple TLR ligands down-regulate miR-33 in murine macrophages. In the case of lipopolysaccharide, this is a delayed, Toll/interleukin-1 receptor (TIR) domain-containing adapter-inducing interferon-β-dependent response that also down-regulates Srebf-2, the host gene for miR-33. miR-33 augments macrophage lipid rafts and enhances proinflammatory cytokine induction and NF-κB activation by LPS. This occurs through an ABCA1- and ABCG1-dependent mechanism and is reversible by interventions upon raft cholesterol and by ABC transporter-inducing liver X receptor agonists. Taken together, these findings extend the purview of miR-33, identifying it as an indirect regulator of innate immunity that mediates bidirectional cross-talk between lipid homeostasis and inflammation.
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Affiliation(s)
- Lihua Lai
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Kathleen M Azzam
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Wan-Chi Lin
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Prashant Rai
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Julie M Lowe
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Kristin A Gabor
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Jennifer H Madenspacher
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Jim J Aloor
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - John S Parks
- Section on Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina 27157
| | - Anders M Näär
- Massachusetts General Hospital Cancer Center, Charlestown, Massachusetts 02129, and Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115
| | - Michael B Fessler
- From the Immunity, Inflammation and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709,
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40
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Deptula N, Royse E, Kemp MW, Miura Y, Kallapur SG, Jobe AH, Hillman NH. Brief mechanical ventilation causes differential epithelial repair along the airways of fetal, preterm lambs. Am J Physiol Lung Cell Mol Physiol 2016; 311:L412-20. [PMID: 27343193 PMCID: PMC5142451 DOI: 10.1152/ajplung.00181.2016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 06/20/2016] [Indexed: 02/01/2023] Open
Abstract
Mechanical ventilation of preterm lambs causes lung inflammation and injury to the airway epithelium, which is repaired by 15 days after ventilation. In mice, activated basal cells (p63+, KRT14+, KRT8+) initiate injury repair to the trachea, whereas club cells coordinate distal airway repair. In both human and sheep, basal cells line the pseudostratified airways to the distal bronchioles with club cells only present in terminal bronchioles. Mechanical ventilation causes airway epithelial injury that is repaired through basal cell activation in the fetal lung. Ewes at 123 ± 1 day gestational age had the head and chest of the fetus exteriorized and tracheostomy placed. With placental circulation intact, fetal lambs were mechanically ventilated with up to 15 ml/kg for 15 min with 95% N2/5% CO2 Fetal lambs were returned to the uterus for up to 24 h. The trachea, left mainstem bronchi, and peripheral lung were evaluated for epithelial injury and cellular response consistent with repair. Peripheral lung tissue had inflammation, pro-inflammatory cytokine production, epithelial growth factor receptor ligand upregulation, increased p63 expression, and proliferation of pro-SPB, TTF-1 positive club cells. In bronchi, KRT14 and KRT8 mRNA increased without increases in Notch pathway mRNA or proliferation. In trachea, mRNA increased for Notch ligands, SAM pointed domain-containing Ets transcription factor and mucin 5B, but not for basal cell markers. A brief period of mechanical ventilation causes differential epithelial activation between trachea, bronchi, and peripheral lung. The repair mechanisms identified in adult mice occur at different levels of airway branching in fetal sheep with basal and club cell activation.
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Affiliation(s)
- Nicole Deptula
- Division of Neonatology, Cardinal Glennon Children's Hospital, Saint Louis University, Saint Louis, Missouri
| | - Emily Royse
- Division of Neonatology, Cardinal Glennon Children's Hospital, Saint Louis University, Saint Louis, Missouri
| | - Matthew W Kemp
- School of Women's and Infants' Health, University of Western Australia, Perth, Australia
| | - Yuichiro Miura
- School of Women's and Infants' Health, University of Western Australia, Perth, Australia
| | - Suhas G Kallapur
- Division of Pulmonary Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio; and School of Women's and Infants' Health, University of Western Australia, Perth, Australia
| | - Alan H Jobe
- Division of Pulmonary Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio; and School of Women's and Infants' Health, University of Western Australia, Perth, Australia
| | - Noah H Hillman
- Division of Neonatology, Cardinal Glennon Children's Hospital, Saint Louis University, Saint Louis, Missouri;
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41
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Shatz M, Shats I, Menendez D, Resnick MA. p53 amplifies Toll-like receptor 5 response in human primary and cancer cells through interaction with multiple signal transduction pathways. Oncotarget 2016. [PMID: 26220208 PMCID: PMC4627285 DOI: 10.18632/oncotarget.4435] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The p53 tumor suppressor regulates transcription of genes associated with diverse cellular functions including apoptosis, growth arrest, DNA repair and differentiation. Recently, we established that p53 can modulate expression of Toll-like receptor (TLR) innate immunity genes but the degree of cross-talk between p53 and TLR pathways remained unclear. Here, using gene expression profiling we characterize the global effect of p53 on the TLR5-mediated transcription in MCF7 cells. We found that combined activation of p53 and TLR5 pathways synergistically increases expression of over 200 genes, mostly associated with immunity and inflammation. The synergy was observed in several human cancer cells and primary lymphocytes. The p53-dependent amplification of transcriptional response to TLR5 activation required expression of NFκB subunit p65 and was mediated by several molecular mechanisms including increased phosphorylation of p38 MAP kinase, PI3K and STAT3 signaling. Additionally, p53 induction increased cytokine expression in response to TNFα, another activator of NFκB and MAP kinase pathways, suggesting a broad interaction between p53 and these signaling pathways. The expression of many synergistically induced genes is elevated in breast cancer patients responsive to chemotherapy. We suggest that p53's capacity to enhance immune response could be exploited to increase antitumor immunity and to improve cancer treatment.
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Affiliation(s)
- Maria Shatz
- Chromosome Stability Group, Laboratory of Molecular Genetics, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Igor Shats
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Daniel Menendez
- Chromosome Stability Group, Laboratory of Molecular Genetics, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Michael A Resnick
- Chromosome Stability Group, Laboratory of Molecular Genetics, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
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Abstract
Upon entry to the systemic circulation, neutrophils exhibit a short mean time to cell death. The viability of most cell types in a steady state is preserved by the interplay of the Bcl-2 family of proteins, wherein the anti-apoptotic members inhibit the action of their pro-apoptotic counterparts. Neutrophils, however, display absent or severely reduced expression of several anti-apoptotic Bcl-2 family proteins. Hence, they rely on the expression of Mcl-1, an anti-apoptotic member of the Bcl-2 family, for survival. This protein is uniquely short-lived relative to related proteins and its loss likely precipitates the induction of apoptosis in neutrophils. This review describes the role of Mcl-1 in the neutrophil in the context of apoptosis and highlights the proteins' importance to the cell. We also address neutrophil apoptosis in the broader context of the cells' response to pathogens, focussing particularly on the strategies used by pathogens to manipulate the apoptotic pathway to their own ends.
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Affiliation(s)
- Mark P Murphy
- Centre for Microbial-Host Interactions, Institute of Technology Tallaght, Old Blessington Road, Tallaght, Dublin 24, Ireland,
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43
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Lipopolysaccharides-Induced Inflammatory Response in White Blood Cells Is Associated with Alterations in Senescence Mediators: Modulation by Metformin. Metab Syndr Relat Disord 2015; 13:278-85. [DOI: 10.1089/met.2014.0168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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44
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Key role for scavenger receptor B-I in the integrative physiology of host defense during bacterial pneumonia. Mucosal Immunol 2015; 8:559-71. [PMID: 25336169 PMCID: PMC4406784 DOI: 10.1038/mi.2014.88] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 08/16/2014] [Indexed: 02/04/2023]
Abstract
Scavenger receptor B-I (SR-BI) is a multirecognition receptor that regulates cholesterol trafficking and cardiovascular inflammation. Although it is expressed by neutrophils (PMNs) and lung-resident cells, no role for SR-BI has been defined in pulmonary immunity. Herein, we report that, compared with SR-BI(+/+) counterparts, SR-BI(-/-) mice suffer markedly increased mortality during bacterial pneumonia associated with higher bacterial burden in the lung and blood, deficient induction of the stress glucocorticoid corticosterone, higher serum cytokines, and increased organ injury. SR-BI(-/-) mice had significantly increased PMN recruitment and cytokine production in the infected airspace. This was associated with defective hematopoietic cell-dependent clearance of lipopolysaccharide from the airspace and increased cytokine production by SR-BI(-/-) macrophages. Corticosterone replacement normalized alveolar neutrophilia but not alveolar cytokines, bacterial burden, or mortality, suggesting that adrenal insufficiency derepresses PMN trafficking to the SR-BI(-/-) airway in a cytokine-independent manner. Despite enhanced alveolar neutrophilia, SR-BI(-/-) mice displayed impaired phagocytic killing. Bone marrow chimeras revealed this defect to be independent of the dyslipidemia and adrenal insufficiency of SR-BI(-/-) mice. During infection, SR-BI(-/-) PMNs displayed deficient oxidant production and CD11b externalization, and increased surface L-selectin, suggesting defective activation. Taken together, SR-BI coordinates several steps in the integrated neutrophilic host defense response to pneumonia.
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45
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Ratovitski EA. Phospho-ΔNp63α-responsive microRNAs contribute to the regulation of necroptosis in squamous cell carcinoma upon cisplatin exposure. FEBS Lett 2015; 589:1352-8. [PMID: 25910754 DOI: 10.1016/j.febslet.2015.04.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/10/2015] [Accepted: 04/13/2015] [Indexed: 12/13/2022]
Abstract
This study shows that specific microRNAs differentially regulated by ΔNp63α in cisplatin-sensitive and resistant squamous cell carcinoma (SSC) cells of larynx and tongue affect the expression of members of the necroptotic pathway CYLD, RIPK1, and MLKL. Different degrees of protein interaction between necroptotic signaling intermediates were also observed in SCC cells sensitive or resistant to cisplatin. Modulation of RIPK1 with miR-101-3p mimic or inhibitor, as well as with siRNA, or chemical inhibitors was shown to affect sensitivity of SCC cells to cisplatin. This is the first report showing the modulatory effect of ΔNp63α-responsive microRNAs on the specific members of necroptotic pathway in SCC tumor cells variably responding to platinum chemotherapy.
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Affiliation(s)
- Edward A Ratovitski
- Head and Neck Cancer Research Division, Department of Otolaryngology/Head and Neck Surgery, The Johns Hopkins School of Medicine, Baltimore, MD 21231, USA.
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46
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Lee JE, Cho KE, Lee KE, Kim J, Bae YS. Nox4-mediated cell signaling regulates differentiation and survival of neural crest stem cells. Mol Cells 2014; 37:907-11. [PMID: 25410908 PMCID: PMC4275708 DOI: 10.14348/molcells.2014.0244] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 09/23/2014] [Indexed: 11/27/2022] Open
Abstract
The function of reactive oxygen species (ROS) as second messengers in cell differentiation has been demonstrated only for a limited number of cell types. Here, we used a well-established protocol for BMP2-induced neuronal differentiation of neural crest stem cells (NCSCs) to examine the function of BMP2-induced ROS during the process. We first show that BMP2 indeed induces ROS generation in NCSCs and that blocking ROS generation by pretreatment of cells with diphenyleneiodonium (DPI) as NADPH oxidase (Nox) inhibitor inhibits neuronal differentiation. Among the ROS-generating Nox isozymes, only Nox4 was expressed at a detectable level in NCSCs. Nox4 appears to be critical for survival of NCSCs at least in vitro as down-regulation by RNA interference led to apoptotic response from NCSCs. Interestingly, development of neural crest-derived peripheral neural structures in Nox4-/- mouse appears to be grossly normal, although Nox4-/- embryos were born at a sub-Mendelian ratio and showed delayed over-all development. Specifically, cranial and dorsal root ganglia, derived from NCSCs, were clearly present in Nox4-/- embryo at embryonic days (E) 9.5 and 10.5. These results suggest that Nox4-mediated ROS generation likely plays important role in fate determination and differentiation of NCSCs, but other Nox isozymes play redundant function during embryogenesis.
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Affiliation(s)
- Ji-Eun Lee
- Department of Life Science and GT5 Program, Ewha Womans University, Seoul 120-750,
Korea
| | - Kyu Eun Cho
- Department of Life Science and GT5 Program, Ewha Womans University, Seoul 120-750,
Korea
| | - Kyung Eun Lee
- Department of Life Science and GT5 Program, Ewha Womans University, Seoul 120-750,
Korea
| | - Jaesang Kim
- Department of Life Science and GT5 Program, Ewha Womans University, Seoul 120-750,
Korea
| | - Yun Soo Bae
- Department of Life Science and GT5 Program, Ewha Womans University, Seoul 120-750,
Korea
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47
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Novel INHAT repressor (NIR) is required for early lymphocyte development. Proc Natl Acad Sci U S A 2014; 111:13930-5. [PMID: 25201955 DOI: 10.1073/pnas.1310118111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Novel inhibitor of histone acetyltransferase repressor (NIR) is a transcriptional corepressor with inhibitor of histone acetyltransferase activity and is a potent suppressor of p53. Although NIR deficiency in mice leads to early embryonic lethality, lymphoid-restricted deletion resulted in the absence of double-positive CD4(+)CD8(+) thymocytes, whereas bone-marrow-derived B cells were arrested at the B220(+)CD19(-) pro-B-cell stage. V(D)J recombination was preserved in NIR-deficient DN3 double-negative thymocytes, suggesting that NIR does not affect p53 function in response to physiologic DNA breaks. Nevertheless, the combined deficiency of NIR and p53 provided rescue of DN3L double-negative thymocytes and their further differentiation to double- and single-positive thymocytes, whereas B cells in the marrow further developed to the B220(+)CD19(+) pro-B-cell stage. Our results show that NIR cooperate with p53 to impose checkpoint for the generation of mature B and T lymphocytes.
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Cooks T, Harris CC, Oren M. Caught in the cross fire: p53 in inflammation. Carcinogenesis 2014; 35:1680-90. [PMID: 24942866 PMCID: PMC4123652 DOI: 10.1093/carcin/bgu134] [Citation(s) in RCA: 112] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 06/06/2014] [Accepted: 06/10/2014] [Indexed: 12/17/2022] Open
Abstract
The p53 transcription factor is a major tumor suppressor, whose diverse activities serve to ensure genome stability and inhibit neoplastic processes. In recent years, it is becoming increasingly clear that p53 also plays a broader role in maintaining cellular homeostasis, as well as contributing to tissue homeostasis in a non-cell-autonomous fashion. Chronic inflammation is a potential cancer-promoting condition, and as such is also within the radar of p53, which mounts a multifaceted attempt to prevent the escalation of chronic tissue imbalance into neoplasia. Recent understanding of the p53 pathway and other family members reveals a broad interaction with inflammatory elements such as reactive oxygen and nitrogen species, cytokines, infectious agents and major immune-regulatory pathways like nuclear factor-kappaB. This complex cross talk is highly dependent on p53 status, as different p53 isoforms and p53 mutants can mediate different responses and even promote chronic inflammation and associated cancer, acting in the tumor cells as well as in the stromal and immune compartments.
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Affiliation(s)
- Tomer Cooks
- Laboratory of Human Carcinogenesis, National Cancer Institute, NIH, Bethesda, MD 20892-4258, USA and Molecular Cell Biology, Weizmann Institute for Science, Rehovot 76100, Israel
| | - Curtis C Harris
- Laboratory of Human Carcinogenesis, National Cancer Institute, NIH, Bethesda, MD 20892-4258, USA and Molecular Cell Biology, Weizmann Institute for Science, Rehovot 76100, Israel
| | - Moshe Oren
- Molecular Cell Biology, Weizmann Institute for Science, Rehovot 76100, Israel
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Environmental attributes to respiratory diseases of small ruminants. Vet Med Int 2014; 2014:853627. [PMID: 24782941 PMCID: PMC3981018 DOI: 10.1155/2014/853627] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 02/13/2014] [Accepted: 02/15/2014] [Indexed: 02/06/2023] Open
Abstract
Respiratory diseases are the major disease crisis in small ruminants. A number of pathogenic microorganisms have been implicated in the development of respiratory disease but the importance of environmental factors in the initiation and progress of disease can never be overemphasized. They irritate the respiratory tree producing stress in the microenvironment causing a decline in the immune status of the small ruminants and thereby assisting bacterial, viral, and parasitic infections to break down the tissue defense barriers. Environmental pollutants cause acute or chronic reactions as they deposit on the alveolar surface which are characterized by inflammation or fibrosis and the formation of transitory or persistent tissue manifestation. Some of the effects of exposures may be immediate, whereas others may not be evident for many decades. Although the disease development can be portrayed as three sets of two-way communications (pathogen-environment, host-environment, and host-pathogen), the interactions are highly variable. Moreover, the environmental scenario is never static; new compounds are introduced daily making a precise evaluation of the disease burden almost impossible. The present review presents a detailed overview of these interactions and the ultimate effect on the respiratory health of sheep and goat.
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Dhama K, Tiwari R, Chakrabort S, Saminathan M, Kumar A, Karthik K, Wani MY, . A, Singh SV, Rahal A. Evidence Based Antibacterial Potentials of Medicinal Plants and Herbs Countering Bacterial Pathogens Especially in the Era of Emerging Drug Resistance: An Integrated Update. INT J PHARMACOL 2013. [DOI: 10.3923/ijp.2014.1.43] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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