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Han SY, Park SY, Won KH, Park SI, Park JH, Shim D, Hwang I, Jeong DH, Kim H. Elucidating the callus-to-shoot-forming mechanism in Capsicum annuum 'Dempsey' through comparative transcriptome analyses. BMC PLANT BIOLOGY 2024; 24:367. [PMID: 38711041 DOI: 10.1186/s12870-024-05033-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 04/17/2024] [Indexed: 05/08/2024]
Abstract
BACKGROUND The formation of shoots plays a pivotal role in plant organogenesis and productivity. Despite its significance, the underlying molecular mechanism of de novo regeneration has not been extensively elucidated in Capsicum annuum 'Dempsey', a bell pepper cultivar. To address this, we performed a comparative transcriptome analysis focusing on the differential expression in C. annuum 'Dempsey' shoot, callus, and leaf tissue. We further investigated phytohormone-related biological processes and their interacting genes in the C. annuum 'Dempsey' transcriptome based on comparative transcriptomic analysis across five species. RESULTS We provided a comprehensive view of the gene networks regulating shoot formation on the callus, revealing a strong involvement of hypoxia responses and oxidative stress. Our comparative transcriptome analysis revealed a significant conservation in the increase of gene expression patterns related to auxin and defense mechanisms in both callus and shoot tissues. Consequently, hypoxia response and defense mechanism emerged as critical regulators in callus and shoot formation in C. annuum 'Dempsey'. Current transcriptome data also indicated a substantial decline in gene expression linked to photosynthesis within regenerative tissues, implying a deactivation of the regulatory system governing photosynthesis in C. annuum 'Dempsey'. CONCLUSION Coupled with defense mechanisms, we thus considered spatial redistribution of auxin to play a critical role in the shoot morphogenesis via primordia outgrowth. Our findings shed light on shoot formation mechanisms in C. annuum 'Dempsey' explants, important information for regeneration programs, and have broader implications for precise molecular breeding in recalcitrant crops.
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Affiliation(s)
- Sang-Yun Han
- Department of Biological Sciences, Institute for Life Sciences, Kangwon National University, Chuncheon, 24341, Korea
| | - So Young Park
- Department of Life Science, Multidisciplinary Genome Institute, Hallym University, Chuncheon, 24252, Korea
| | - Kang-Hee Won
- Department of Biological Sciences, Institute for Life Sciences, Kangwon National University, Chuncheon, 24341, Korea
| | - Sung-Il Park
- Department of BIT Medical Convergence, Kangwon National University, Chuncheon, 24341, Korea
| | - Jae-Hyeong Park
- Department of BIT Medical Convergence, Kangwon National University, Chuncheon, 24341, Korea
| | - Donghwan Shim
- Department of Biological Sciences, Chungnam National University, Daejeon, 34134, Korea
| | - Inhwan Hwang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Dong-Hoon Jeong
- Department of Life Science, Multidisciplinary Genome Institute, Hallym University, Chuncheon, 24252, Korea.
| | - Hyeran Kim
- Department of Biological Sciences, Institute for Life Sciences, Kangwon National University, Chuncheon, 24341, Korea.
- Department of BIT Medical Convergence, Kangwon National University, Chuncheon, 24341, Korea.
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Zhang L, Cai M, Su B, Ma Y, Zhang Y. Mitochondrial Metabolism in Alveolar Macrophages of Patients Infected with HIV, Tuberculosis, and HIV/Tuberculosis. AIDS Res Hum Retroviruses 2024; 40:148-157. [PMID: 37885217 DOI: 10.1089/aid.2023.0064] [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] [Indexed: 10/28/2023] Open
Abstract
Tuberculosis (TB) is one of the most common opportunistic infections and is a leading cause of mortality in patients with HIV and AIDS. HIV infection causes serious defects in the host immune system and increases the risk of active TB. TB infection promotes HIV replication and aggravates host damage in patients with HIV/AIDS. Alveolar macrophages (AMs) are essential immune cells during TB and HIV infections. AMs undergo a shift in mitochondrial metabolism during TB or HIV infection, that is, metabolic reprogramming, allowing them to act in the form of classical activated macrophages (M1) and alternative activated macrophages (M2) at different stages of infection. We reviewed the alterations in the mitochondrial energy metabolism of AMs in patients with HIV, TB, and HIV/TB to provide ideas for further research on the role of metabolic reprogramming by AMs in the pathogeneses of HIV, TB, and HIV/TB coinfection.
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Affiliation(s)
- Ling Zhang
- Department of Respiratory and Critical Care Medicine, Beijing Youan Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Miaotian Cai
- Department of Respiratory and Critical Care Medicine, Beijing Youan Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Bin Su
- Beijing Key Laboratory for HIV/AIDS Research, Clinical and Research Center for Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Yingmin Ma
- Department of Respiratory and Critical Care Medicine, Beijing Youan Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Yulin Zhang
- Department of Respiratory and Critical Care Medicine, Beijing Youan Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, China
- Laboratory for Clinical Medicine, Capital Medical University, Beijing, China
- Beijing Research Center for Respiratory Infectious Diseases, Beijing, China
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3
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Gao X, Feng J, Wei L, Dong P, Chen J, Zhang L, Yang Y, Xu L, Wang H, Luo J, Qin M. Defensins: A novel weapon against Mycobacterium tuberculosis? Int Immunopharmacol 2024; 127:111383. [PMID: 38118315 DOI: 10.1016/j.intimp.2023.111383] [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: 10/10/2023] [Revised: 12/04/2023] [Accepted: 12/12/2023] [Indexed: 12/22/2023]
Abstract
Tuberculosis (TB) is a serious airborne communicable disease caused by organisms of the Mycobacterium tuberculosis (Mtb) complex. Although the standard treatment antimicrobials, including isoniazid, rifampicin, pyrazinamide, and ethambutol, have made great progress in the treatment of TB, problems including the rising incidence of multidrug-resistant tuberculosis (MDR-TB) and extensively drug-resistant tuberculosis (XDR-TB), the severe toxicity and side effects of antimicrobials, and the low immunity of TB patients have become the bottlenecks of the current TB treatments. Therefore, both safe and effective new strategies to prevent and treat TB have become a top priority. As a subfamily of cationic antimicrobial peptides, defensins are rich in cysteine and play a vital role in resisting the invasion of microorganisms and regulating the immune response. Inspired by studies on the roles of defensins in host defence, we describe their research history and then review their structural features and antimicrobial mechanisms, specifically for fighting Mtb in detail. Finally, we discuss the clinical relevance, therapeutic potential, and potential challenges of defensins in anti-TB therapy. We further debate the possible solutions of the current application of defensins to provide new insights for eliminating Mtb.
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Affiliation(s)
- Xuehan Gao
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Jihong Feng
- Department of Oncology, The Sixth Affiliated Hospital of Wenzhou Medical University, Lishui People's Hospital, Lishui 323000, China
| | - Linna Wei
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Pinzhi Dong
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Jin Chen
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Langlang Zhang
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Yuhan Yang
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Lin Xu
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Haiyan Wang
- Department of Epidemiology and Health Statistics, Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Junmin Luo
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China.
| | - Ming Qin
- Department of Immunology, Center of Immunomolecular Engineering, Innovation & Practice Base for Graduate Students Education, Special Key Laboratory of Gene Detection & Therapy, Zunyi Medical University, Zunyi, Guizhou 563000, China; Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563000, China.
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4
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Mikami Y, Grubb BR, Rogers TD, Dang H, Asakura T, Kota P, Gilmore RC, Okuda K, Morton LC, Sun L, Chen G, Wykoff JA, Ehre C, Vilar J, van Heusden C, Livraghi-Butrico A, Gentzsch M, Button B, Stutts MJ, Randell SH, O’Neal WK, Boucher RC. Chronic airway epithelial hypoxia exacerbates injury in muco-obstructive lung disease through mucus hyperconcentration. Sci Transl Med 2023; 15:eabo7728. [PMID: 37285404 PMCID: PMC10664029 DOI: 10.1126/scitranslmed.abo7728] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 05/17/2023] [Indexed: 06/09/2023]
Abstract
Unlike solid organs, human airway epithelia derive their oxygen from inspired air rather than the vasculature. Many pulmonary diseases are associated with intraluminal airway obstruction caused by aspirated foreign bodies, virus infection, tumors, or mucus plugs intrinsic to airway disease, including cystic fibrosis (CF). Consistent with requirements for luminal O2, airway epithelia surrounding mucus plugs in chronic obstructive pulmonary disease (COPD) lungs are hypoxic. Despite these observations, the effects of chronic hypoxia (CH) on airway epithelial host defense functions relevant to pulmonary disease have not been investigated. Molecular characterization of resected human lungs from individuals with a spectrum of muco-obstructive lung diseases (MOLDs) or COVID-19 identified molecular features of chronic hypoxia, including increased EGLN3 expression, in epithelia lining mucus-obstructed airways. In vitro experiments using cultured chronically hypoxic airway epithelia revealed conversion to a glycolytic metabolic state with maintenance of cellular architecture. Chronically hypoxic airway epithelia unexpectedly exhibited increased MUC5B mucin production and increased transepithelial Na+ and fluid absorption mediated by HIF1α/HIF2α-dependent up-regulation of β and γENaC (epithelial Na+ channel) subunit expression. The combination of increased Na+ absorption and MUC5B production generated hyperconcentrated mucus predicted to perpetuate obstruction. Single-cell and bulk RNA sequencing analyses of chronically hypoxic cultured airway epithelia revealed transcriptional changes involved in airway wall remodeling, destruction, and angiogenesis. These results were confirmed by RNA-in situ hybridization studies of lungs from individuals with MOLD. Our data suggest that chronic airway epithelial hypoxia may be central to the pathogenesis of persistent mucus accumulation in MOLDs and associated airway wall damage.
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Affiliation(s)
- Yu Mikami
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Barbara R. Grubb
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Troy D. Rogers
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Hong Dang
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Takanori Asakura
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Pradeep Kota
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Rodney C. Gilmore
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Kenichi Okuda
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Lisa C. Morton
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Ling Sun
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Gang Chen
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Jason A. Wykoff
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Camille Ehre
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Juan Vilar
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Catharina van Heusden
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | | | - Martina Gentzsch
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Brian Button
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - M. Jackson Stutts
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Scott H. Randell
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Wanda K. O’Neal
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Richard C. Boucher
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
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Polinário G, Primo LMDG, Rosa MABC, Dett FHM, Barbugli PA, Roque-Borda CA, Pavan FR. Antimicrobial peptides as drugs with double response against Mycobacterium tuberculosis coinfections in lung cancer. Front Microbiol 2023; 14:1183247. [PMID: 37342560 PMCID: PMC10277934 DOI: 10.3389/fmicb.2023.1183247] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 05/16/2023] [Indexed: 06/23/2023] Open
Abstract
Tuberculosis and lung cancer are, in many cases, correlated diseases that can be confused because they have similar symptoms. Many meta-analyses have proven that there is a greater chance of developing lung cancer in patients who have active pulmonary tuberculosis. It is, therefore, important to monitor the patient for a long time after recovery and search for combined therapies that can treat both diseases, as well as face the great problem of drug resistance. Peptides are molecules derived from the breakdown of proteins, and the membranolytic class is already being studied. It has been proposed that these molecules destabilize cellular homeostasis, performing a dual antimicrobial and anticancer function and offering several possibilities of adaptation for adequate delivery and action. In this review, we focus on two important reason for the use of multifunctional peptides or peptides, namely the double activity and no harmful effects on humans. We review some of the main antimicrobial and anti-inflammatory bioactive peptides and highlight four that have anti-tuberculosis and anti-cancer activity, which may contribute to obtaining drugs with this dual functionality.
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Affiliation(s)
- Giulia Polinário
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | | | | | | | - Paula Aboud Barbugli
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | | | - Fernando Rogério Pavan
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
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6
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Jacobo-Delgado YM, Rodríguez-Carlos A, Serrano CJ, Rivas-Santiago B. Mycobacterium tuberculosis cell-wall and antimicrobial peptides: a mission impossible? Front Immunol 2023; 14:1194923. [PMID: 37266428 PMCID: PMC10230078 DOI: 10.3389/fimmu.2023.1194923] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 04/25/2023] [Indexed: 06/03/2023] Open
Abstract
Mycobacterium tuberculosis (Mtb) is one of the most important infectious agents worldwide and causes more than 1.5 million deaths annually. To make matters worse, the drug resistance among Mtb strains has risen substantially in the last few decades. Nowadays, it is not uncommon to find patients infected with Mtb strains that are virtually resistant to all antibiotics, which has led to the urgent search for new molecules and therapies. Over previous decades, several studies have demonstrated the efficiency of antimicrobial peptides to eliminate even multidrug-resistant bacteria, making them outstanding candidates to counterattack this growing health problem. Nevertheless, the complexity of the Mtb cell wall makes us wonder whether antimicrobial peptides can effectively kill this persistent Mycobacterium. In the present review, we explore the complexity of the Mtb cell wall and analyze the effectiveness of antimicrobial peptides to eliminate the bacilli.
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7
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Dhiman A, Talukdar S, Chaubey GK, Dilawari R, Modanwal R, Chaudhary S, Patidar A, Boradia VM, Kumbhar P, Raje CI, Raje M. Regulation of Macrophage Cell Surface GAPDH Alters LL-37 Internalization and Downstream Effects in the Cell. J Innate Immun 2023; 15:581-598. [PMID: 37080180 PMCID: PMC10315065 DOI: 10.1159/000530083] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 03/03/2023] [Indexed: 04/22/2023] Open
Abstract
Mycobacterium tuberculosis (M.tb), the major causative agent of tuberculosis, has evolved mechanisms to evade host defenses and persist within host cells. Host-directed therapies against infected cells are emerging as an effective option. Cationic host defense peptide LL-37 is known to internalize into cells and induce autophagy resulting in intracellular killing of M.tb. This peptide also regulates the immune system and interacts with the multifunctional protein glyceraldehyde-3-phosphate dehydrogenase (GAPDH) inside macrophages. Our investigations revealed that GAPDH moonlights as a mononuclear cell surface receptor that internalizes LL-37. We confirmed that the surface levels of purinergic receptor 7, the receptor previously reported for this peptide, remained unaltered on M.tb infected macrophages. Upon infection or cellular activation with IFNγ, surface recruited GAPDH bound to and internalized LL-37 into endocytic compartments via a lipid raft-dependent process. We also discovered a role for GAPDH in LL-37-mediated autophagy induction and clearance of intracellular pathogens. In infected macrophages wherein GAPDH had been knocked down, we observed an inhibition of LL-37-mediated autophagy which was rescued by GAPDH overexpression. This process was dependent on intracellular calcium and p38 MAPK pathways. Our findings reveal a previously unknown process by which macrophages internalize an antimicrobial peptide via cell surface GAPDH and suggest a moonlighting role of GAPDH in regulating cellular phenotypic responses of LL-37 resulting in reduction of M.tb burden.
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Affiliation(s)
- Asmita Dhiman
- Institute of Microbial Technology, CSIR, Chandigarh, India
| | | | | | - Rahul Dilawari
- Institute of Microbial Technology, CSIR, Chandigarh, India
| | | | | | - Anil Patidar
- Institute of Microbial Technology, CSIR, Chandigarh, India
| | | | - Pradeep Kumbhar
- National Institute of Pharmaceutical Education and Research, Punjab, India
| | | | - Manoj Raje
- Institute of Microbial Technology, CSIR, Chandigarh, India
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8
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Macrophages: From Simple Phagocyte to an Integrative Regulatory Cell for Inflammation and Tissue Regeneration-A Review of the Literature. Cells 2023; 12:cells12020276. [PMID: 36672212 PMCID: PMC9856654 DOI: 10.3390/cells12020276] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/29/2022] [Accepted: 01/07/2023] [Indexed: 01/12/2023] Open
Abstract
The understanding of macrophages and their pathophysiological role has dramatically changed within the last decades. Macrophages represent a very interesting cell type with regard to biomaterial-based tissue engineering and regeneration. In this context, macrophages play a crucial role in the biocompatibility and degradation of implanted biomaterials. Furthermore, a better understanding of the functionality of macrophages opens perspectives for potential guidance and modulation to turn inflammation into regeneration. Such knowledge may help to improve not only the biocompatibility of scaffold materials but also the integration, maturation, and preservation of scaffold-cell constructs or induce regeneration. Nowadays, macrophages are classified into two subpopulations, the classically activated macrophages (M1 macrophages) with pro-inflammatory properties and the alternatively activated macrophages (M2 macrophages) with anti-inflammatory properties. The present narrative review gives an overview of the different functions of macrophages and summarizes the recent state of knowledge regarding different types of macrophages and their functions, with special emphasis on tissue engineering and tissue regeneration.
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9
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Bourgonje AR, Kloska D, Grochot-Przęczek A, Feelisch M, Cuadrado A, van Goor H. Personalized redox medicine in inflammatory bowel diseases: an emerging role for HIF-1α and NRF2 as therapeutic targets. Redox Biol 2023; 60:102603. [PMID: 36634466 PMCID: PMC9841059 DOI: 10.1016/j.redox.2023.102603] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 01/07/2023] Open
Abstract
Inflammatory bowel diseases (IBD), encompassing Crohn's disease (CD) and ulcerative colitis (UC), are intimately associated with inflammation and overproduction of reactive oxygen species (ROS). Temporal and inter-individual variabilities in disease activity and response to therapy pose significant challenges to diagnosis and patient care. Discovery and validation of truly integrative biomarkers would benefit from embracing redox metabolomics approaches with prioritization of central regulatory hubs. We here make a case for applying a personalized redox medicine approach that aims to selectively inhibit pathological overproduction and/or altered expression of specific enzymatic sources of ROS without compromising physiological function. To this end, improved 'clinical-omics integration' may help to better understand which particular redox signaling pathways are disrupted in what patient. Pharmacological interventions capable of activating endogenous antioxidant defense systems may represent viable therapeutic options to restore local/systemic redox status, with HIF-1α and NRF2 holding particular promise in this context. Achieving the implementation of clinically meaningful mechanism-based biomarkers requires development of easy-to-use, robust and cost-effective tools for secure diagnosis and monitoring of treatment efficacy. Ultimately, matching redox-directed pharmacological interventions to individual patient phenotypes using predictive biomarkers may offer new opportunities to break the therapeutic ceiling in IBD.
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Affiliation(s)
- Arno R. Bourgonje
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands,Corresponding author.
| | - Damian Kloska
- Malopolska Centre of Biotechnology, Jagiellonian University, Kraków, Poland
| | - Anna Grochot-Przęczek
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Martin Feelisch
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Antonio Cuadrado
- Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC. Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), ISCIII, Madrid, Spain
| | - Harry van Goor
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
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Singh VK, Chau E, Mishra A, DeAnda A, Hegde VL, Sastry JK, Haviland D, Jagannath C, Godin B, Khan A. CD44 receptor targeted nanoparticles augment immunity against tuberculosis in mice. J Control Release 2022; 349:796-811. [PMID: 35914613 PMCID: PMC10478167 DOI: 10.1016/j.jconrel.2022.07.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 02/01/2023]
Abstract
We describe a role of CD44-mediated signaling during host-defense against tuberculosis (TB) using a mouse model of TB and studies in M. tuberculosis (Mtb) infected human macrophage (MФ). Liposomes targeting CD44 using thioaptamers (CD44TA-LIP) were designed and tested as new vaccines to boost host immunity in TB. CD44TA-LIP enhanced killing of Mtb in human MФ, which correlated with an increased production of pro-inflammatory cytokines IL-1β, TNF-α and IL-12. CD44TA-LIP activated MФ showed an enhanced MHC-II dependent antigen presentation to CD4 T-cells. Inhibition of cellular proliferation and cytoskeleton rearrangement pathways downstream of CD44 signaling abrogated CD44TA-LIP-induced antimicrobial effects. Blockade of inflammatory pathways also reduced antigen presentation by MФ and activation of CD4 T cells. Mtb infected MФ treated with CD44TA-LIP exhibited increased nitric oxide and HβD2 defensin peptide production. Among Mtb infected mice with increased lung and spleen loads of organisms, intranasal administration of CD44TA-LIP led to a ten-fold reduction of colony forming units of Mtb and elevated IFN-γ + CD4, effector, central and resident memory T cells. Biodistribution studies demonstrated that CD44TA-LIP preferentially accumulated in the lungs and were associated with CD11b + cells. CD44TA-LIP treated mice showed no weight loss or increased liver LDH levels. This study highlights the importance of CD44-mediated signaling in host-defense during TB and the therapeutic potential of CD44TA-LIP.
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Affiliation(s)
- Vipul K Singh
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Eric Chau
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Abhishek Mishra
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Alexandro DeAnda
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Venkatesh L Hegde
- Department of Thoracic Head & Neck Medical Oncology, Division of Cancer Medicine, MD Anderson Cancer Center, Houston, TX, USA
| | - Jagannadha K Sastry
- Department of Thoracic Head & Neck Medical Oncology, Division of Cancer Medicine, MD Anderson Cancer Center, Houston, TX, USA
| | - David Haviland
- Flow Cytometry Core, Houston Methodist Research Institute, Houston, TX, USA
| | - Chinnaswamy Jagannath
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Houston, TX, USA.
| | - Biana Godin
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA.
| | - Arshad Khan
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Houston, TX, USA.
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11
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Liu C, Wu K, Sun T, Chen B, Yi Y, Ren R, Xie L, Xiao K. Effect of invasive mechanical ventilation on the diversity of the pulmonary microbiota. Crit Care 2022; 26:252. [PMID: 35996150 PMCID: PMC9394019 DOI: 10.1186/s13054-022-04126-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 08/02/2022] [Indexed: 11/10/2022] Open
Abstract
Pulmonary microbial diversity may be influenced by biotic or abiotic conditions (e.g., disease, smoking, invasive mechanical ventilation (MV), etc.). Specially, invasive MV may trigger structural and physiological changes in both tissue and microbiota of lung, due to gastric and oral microaspiration, altered body posture, high O2 inhalation-induced O2 toxicity in hypoxemic patients, impaired airway clearance and ventilator-induced lung injury (VILI), which in turn reduce the diversity of the pulmonary microbiota and may ultimately lead to poor prognosis. Furthermore, changes in (local) O2 concentration can reduce the diversity of the pulmonary microbiota by affecting the local immune microenvironment of lung. In conclusion, systematic literature studies have found that invasive MV reduces pulmonary microbiota diversity, and future rational regulation of pulmonary microbiota diversity by existing or novel clinical tools (e.g., lung probiotics, drugs) may improve the prognosis of invasive MV treatment and lead to more effective treatment of lung diseases with precision.
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Affiliation(s)
- Chang Liu
- College of Pulmonary & Critical Care Medicine, 8th Medical Center, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Kang Wu
- College of Pulmonary & Critical Care Medicine, 8th Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Tianyu Sun
- College of Pulmonary & Critical Care Medicine, 8th Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Bin Chen
- MatriDx Biotechnology Co., Ltd, Hangzhou, China
| | - Yaxing Yi
- MatriDx Biotechnology Co., Ltd, Hangzhou, China
| | - Ruotong Ren
- MatriDx Biotechnology Co., Ltd, Hangzhou, China.
- Foshan Branch, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.
| | - Lixin Xie
- College of Pulmonary & Critical Care Medicine, 8th Medical Center, Chinese PLA General Hospital, Beijing, China.
- School of Medicine, Nankai University, Tianjin, China.
| | - Kun Xiao
- College of Pulmonary & Critical Care Medicine, 8th Medical Center, Chinese PLA General Hospital, Beijing, China.
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12
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Lu Q, Liu J, Yu Y, Liang HF, Zhang SQ, Li ZB, Chen JX, Xu QG, Li JC. ALB, HP, OAF and RBP4 as novel protein biomarkers for identifying cured patients with pulmonary tuberculosis by DIA. Clin Chim Acta 2022; 535:82-91. [PMID: 35964702 DOI: 10.1016/j.cca.2022.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/09/2022] [Accepted: 08/01/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND Pulmonary tuberculosis (TB) is a serious infectious disease that lacks robust blood-based biomarkers to identify cured TB. Some discharged patients are not fully cured and may relapse or even develop multidrug-resistant TB. This study is committed to finding proteomic-based plasma biomarkers to support establishing laboratory standards for clinical TB cure. METHODS Data-independent acquisition (DIA) was used to obtain the plasma protein expression profiles of TB patients at different treatment stages compared with healthy controls. Multivariate statistical methods and bioinformatics were used to analyze the data. RESULTS Bioinformatic analysis suggests coagulation dysfunction and vitamin and lipid metabolism disturbances in TB. Albumin (ALB), haptoglobin (HP), out at first protein homolog (OAF), and retinol-binding protein 4 (RBP4) can be used to establish a diagnostic model for the efficacy evaluation of TB with an area under the curve of 0.963, which could effectively distinguish untreated TB patients from cured patients. CONCLUSIONS Our research demonstrated that ALB, HP, OAF and RBP4 can be potential biomarkers for evaluating the efficacy of TB. These findings may provide experimental data for establishing the laboratory indicators of clinical TB cure and providing clinicians with new targets for exploring the underlying mechanisms of TB pathogenesis.
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Affiliation(s)
- Qiqi Lu
- The Medical Research Center, Yue Bei People's Hospital, Shantou University Medical College, Shaoguan 512025, China
| | - Jun Liu
- The Medical Research Center, Yue Bei People's Hospital, Shantou University Medical College, Shaoguan 512025, China
| | - Yi Yu
- The Medical Research Center, Yue Bei People's Hospital, Shantou University Medical College, Shaoguan 512025, China; The Central Laboratory, Yangjiang People's Hospital, Yangjiang 529500, China
| | - Hong-Feng Liang
- The Central Laboratory, Yangjiang People's Hospital, Yangjiang 529500, China
| | - Shan-Qiang Zhang
- The Medical Research Center, Yue Bei People's Hospital, Shantou University Medical College, Shaoguan 512025, China
| | - Zhi-Bin Li
- The Medical Research Center, Yue Bei People's Hospital, Shantou University Medical College, Shaoguan 512025, China; The Central Laboratory, Yangjiang People's Hospital, Yangjiang 529500, China; Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Jia-Xi Chen
- Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Taizhou 318050, China; Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Qiu-Gui Xu
- The Central Laboratory, Yangjiang People's Hospital, Yangjiang 529500, China
| | - Ji-Cheng Li
- The Medical Research Center, Yue Bei People's Hospital, Shantou University Medical College, Shaoguan 512025, China
- The Central Laboratory, Yangjiang People's Hospital, Yangjiang 529500, China
- Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou 310058, China
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13
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Abstract
Pulmonary granulomas are widely considered the epicenters of the immune response to Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB). Recent animal studies have revealed factors that either promote or restrict TB immunity within granulomas. These models, however, typically ignore the impact of preexisting immunity on cellular organization and function, an important consideration because most TB probably occurs through reinfection of previously exposed individuals. Human postmortem research from the pre-antibiotic era showed that infections in Mtb-naïve individuals (primary TB) versus those with prior Mtb exposure (postprimary TB) have distinct pathologic features. We review recent animal findings in TB granuloma biology, which largely reflect primary TB. We also discuss our current understanding of postprimary TB lesions, about which much less is known. Many knowledge gaps remain, particularly regarding how preexisting immunity shapes granuloma structure and local immune responses at Mtb infection sites. Expected final online publication date for the Annual Review of Immunology, Volume 40 is April 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Sara B. Cohen
- Seattle Children's Research Institute, Seattle, Washington, USA
| | - Benjamin H. Gern
- Seattle Children's Research Institute, Seattle, Washington, USA
- Department of Pediatrics, University of Washington, Seattle, Washington, USA
| | - Kevin B. Urdahl
- Seattle Children's Research Institute, Seattle, Washington, USA
- Department of Pediatrics, University of Washington, Seattle, Washington, USA
- Department of Immunology, University of Washington, Seattle, Washington, USA
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14
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Zenk SF, Hauck S, Mayer D, Grieshober M, Stenger S. Stabilization of Hypoxia-Inducible Factor Promotes Antimicrobial Activity of Human Macrophages Against Mycobacterium tuberculosis. Front Immunol 2021; 12:678354. [PMID: 34149713 PMCID: PMC8206807 DOI: 10.3389/fimmu.2021.678354] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/18/2021] [Indexed: 01/27/2023] Open
Abstract
Hypoxia-inducible factor (HIF) is a key oxygen sensor that controls gene expression patterns to adapt cellular metabolism to hypoxia. Pharmacological inhibition of prolyl-hydroxylases stabilizes HIFs and mimics hypoxia, leading to increased expression of more than 300 genes. Whether the genetic program initialized by HIFs affects immune responses against microbial pathogens, is not well studied. Recently we showed that hypoxia enhances antimicrobial activity against Mycobacterium tuberculosis (Mtb) in human macrophages. The objective of this study was to evaluate whether the oxygen sensor HIF is involved in hypoxia-mediated antimycobacterial activity. Treatment of Mtb-infected macrophages with the prolyl-hydroxylase inhibitor Molidustat reduced the release of TNFα and IL-10, two key cytokines involved in the immune response in tuberculosis. Molidustat also interferes with the p38 MAP kinase pathway. HIF-stabilization by Molidustat also induced the upregulation of the Vitamin D receptor and human β defensin 2, which define an antimicrobial effector pathway in human macrophages. Consequently, these immunological effects resulted in reduced proliferation of virulent Mtb in human macrophages. Therefore, HIFs may be attractive new candidates for host-directed therapies against infectious diseases caused by intracellular bacteria, including tuberculosis.
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Affiliation(s)
- Sebastian F Zenk
- Institute of Medical Microbiology and Infection Control, University Hospital Ulm, Ulm, Germany
| | - Sebastian Hauck
- Institute of Medical Microbiology and Infection Control, University Hospital Ulm, Ulm, Germany
| | - Daniel Mayer
- Institute of Medical Microbiology and Infection Control, University Hospital Ulm, Ulm, Germany
| | - Mark Grieshober
- Institute of Medical Microbiology and Infection Control, University Hospital Ulm, Ulm, Germany
| | - Steffen Stenger
- Institute of Medical Microbiology and Infection Control, University Hospital Ulm, Ulm, Germany
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15
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Marin-Luevano SP, Rodriguez-Carlos A, Jacobo-Delgado Y, Valdez-Miramontes C, Enciso-Moreno JA, Rivas-Santiago B. Steroid hormone modulates the production of cathelicidin and human β-defensins in lung epithelial cells and macrophages promoting Mycobacterium tuberculosis killing. Tuberculosis (Edinb) 2021; 128:102080. [PMID: 33799143 DOI: 10.1016/j.tube.2021.102080] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 11/18/2022]
Abstract
Several studies have documented the interaction between the immune and endocrine systems as an effective defense strategy against tuberculosis, involving the production of several molecules and immunological processes. In this study, we determined the effect of cortisol and dehydroepiandrosterone (DHEA) on the production of antimicrobial peptides such as cathelicidin and human β-defensin (HBD) -2, and HBD-3 and their effect on intracellular growth of Mycobacterium tuberculosis (Mtb) in lung epithelial cells and macrophages. Our results showed that DHEA promotes the production of these antimicrobial peptides in infected cells, correlating with the decrease of Mtb bacilli loads. These results suggest the use of exogenous DHEA as an adjuvant for tuberculosis therapy.
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Affiliation(s)
- Sara P Marin-Luevano
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico; Center for Research in Health Sciences and Biomedicine, Autonomous University of San Luis Potosí, Mexico
| | - Adrian Rodriguez-Carlos
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | - Yolanda Jacobo-Delgado
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | | | - Jose A Enciso-Moreno
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | - Bruno Rivas-Santiago
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico.
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16
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Mechanisms controlling bacterial infection in myeloid cells under hypoxic conditions. Cell Mol Life Sci 2020; 78:1887-1907. [PMID: 33125509 PMCID: PMC7966188 DOI: 10.1007/s00018-020-03684-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 09/08/2020] [Accepted: 10/09/2020] [Indexed: 12/12/2022]
Abstract
Various factors of the tissue microenvironment such as the oxygen concentration influence the host-pathogen interaction. During the past decade, hypoxia-driven signaling via hypoxia-inducible factors (HIF) has emerged as an important factor that affects both the pathogen and the host. In this chapter, we will review the current knowledge of this complex interplay, with a particular emphasis given to the impact of hypoxia and HIF on the inflammatory and antimicrobial activity of myeloid cells, the bacterial responses to hypoxia and the containment of bacterial infections under oxygen-limited conditions. We will also summarize how low oxygen concentrations influence the metabolism of neutrophils, macrophages and dendritic cells. Finally, we will discuss the consequences of hypoxia and HIFα activation for the invading pathogen, with a focus on Pseudomonas aeruginosa, Mycobacterium tuberculosis, Coxiella burnetii, Salmonella enterica and Staphylococcus aureus. This includes a description of the mechanisms and microbial factors, which the pathogens use to sense and react to hypoxic conditions.
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17
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Interleukin-26 activates macrophages and facilitates killing of Mycobacterium tuberculosis. Sci Rep 2020; 10:17178. [PMID: 33057074 PMCID: PMC7558018 DOI: 10.1038/s41598-020-73989-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 08/31/2020] [Indexed: 12/12/2022] Open
Abstract
Tuberculosis-causing Mycobacterium tuberculosis (Mtb) is transmitted via airborne droplets followed by a primary infection of macrophages and dendritic cells. During the activation of host defence mechanisms also neutrophils and T helper 1 (TH1) and TH17 cells are recruited to the site of infection. The TH17 cell-derived interleukin (IL)-17 in turn induces the cathelicidin LL37 which shows direct antimycobacterial effects. Here, we investigated the role of IL-26, a TH1- and TH17-associated cytokine that exhibits antimicrobial activity. We found that both IL-26 mRNA and protein are strongly increased in tuberculous lymph nodes. Furthermore, IL-26 is able to directly kill Mtb and decrease the infection rate in macrophages. Binding of IL-26 to lipoarabinomannan might be one important mechanism in extracellular killing of Mtb. Macrophages and dendritic cells respond to IL-26 with secretion of tumor necrosis factor (TNF)-α and chemokines such as CCL20, CXCL2 and CXCL8. In dendritic cells but not in macrophages cytokine induction by IL-26 is partly mediated via Toll like receptor (TLR) 2. Taken together, IL-26 strengthens the defense against Mtb in two ways: firstly, directly due to its antimycobacterial properties and secondly indirectly by activating innate immune mechanisms.
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18
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Mercer DK, Torres MDT, Duay SS, Lovie E, Simpson L, von Köckritz-Blickwede M, de la Fuente-Nunez C, O'Neil DA, Angeles-Boza AM. Antimicrobial Susceptibility Testing of Antimicrobial Peptides to Better Predict Efficacy. Front Cell Infect Microbiol 2020; 10:326. [PMID: 32733816 PMCID: PMC7358464 DOI: 10.3389/fcimb.2020.00326] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 05/29/2020] [Indexed: 12/11/2022] Open
Abstract
During the development of antimicrobial peptides (AMP) as potential therapeutics, antimicrobial susceptibility testing (AST) stands as an essential part of the process in identification and optimisation of candidate AMP. Standard methods for AST, developed almost 60 years ago for testing conventional antibiotics, are not necessarily fit for purpose when it comes to determining the susceptibility of microorganisms to AMP. Without careful consideration of the parameters comprising AST there is a risk of failing to identify novel antimicrobials at a time when antimicrobial resistance (AMR) is leading the planet toward a post-antibiotic era. More physiologically/clinically relevant AST will allow better determination of the preclinical activity of drug candidates and allow the identification of lead compounds. An important consideration is the efficacy of AMP in biological matrices replicating sites of infection, e.g., blood/plasma/serum, lung bronchiolar lavage fluid/sputum, urine, biofilms, etc., as this will likely be more predictive of clinical efficacy. Additionally, specific AST for different target microorganisms may help to better predict efficacy of AMP in specific infections. In this manuscript, we describe what we believe are the key considerations for AST of AMP and hope that this information can better guide the preclinical development of AMP toward becoming a new generation of urgently needed antimicrobials.
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Affiliation(s)
| | - Marcelo D. T. Torres
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, Penn Institute for Computational Science, and Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, United States
| | - Searle S. Duay
- Department of Chemistry, Institute of Materials Science, University of Connecticut, Storrs, CT, United States
| | - Emma Lovie
- NovaBiotics Ltd, Aberdeen, United Kingdom
| | | | | | - Cesar de la Fuente-Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, Penn Institute for Computational Science, and Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, United States
| | | | - Alfredo M. Angeles-Boza
- Department of Chemistry, Institute of Materials Science, University of Connecticut, Storrs, CT, United States
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19
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Rodriguez-Carlos A, Valdez-Miramontes C, Marin-Luevano P, González-Curiel I, Enciso-Moreno JA, Rivas-Santiago B. Metformin promotes Mycobacterium tuberculosis killing and increases the production of human β-defensins in lung epithelial cells and macrophages. Microbes Infect 2020; 22:111-118. [DOI: 10.1016/j.micinf.2019.10.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 09/17/2019] [Accepted: 10/28/2019] [Indexed: 02/07/2023]
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20
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Yathursan S, Wiles S, Read H, Sarojini V. A review on anti-tuberculosis peptides: Impact of peptide structure on anti-tuberculosis activity. J Pept Sci 2019; 25:e3213. [PMID: 31515916 DOI: 10.1002/psc.3213] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/03/2019] [Accepted: 08/07/2019] [Indexed: 12/18/2022]
Abstract
Antibiotic resistance is a major public health problem globally. Particularly concerning amongst drug-resistant human pathogens is Mycobacterium tuberculosis that causes the deadly infectious tuberculosis (TB) disease. Significant issues associated with current treatment options for drug-resistant TB and the high rate of mortality from the disease makes the development of novel treatment options against this pathogen an urgent need. Antimicrobial peptides are part of innate immunity in all forms of life and could provide a potential solution against drug-resistant TB. This review is a critical analysis of antimicrobial peptides that are reported to be active against the M tuberculosis complex exclusively. However, activity on non-TB strains such as Mycobacterium avium and Mycobacterium intracellulare, whenever available, have been included at appropriate sections for these anti-TB peptides. Natural and synthetic antimicrobial peptides of diverse sequences, along with their chemical structures, are presented, discussed, and correlated to their observed antimycobacterial activities. Critical analyses of the structure allied to the anti-mycobacterial activity have allowed us to draw important conclusions and ideas for research and development on these promising molecules to realise their full potential. Even though the review is focussed on peptides, we have briefly summarised the structures and potency of the various small molecule drugs that are available and under development, for TB treatment.
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Affiliation(s)
- Sutharsana Yathursan
- School of Chemical Sciences, University of Auckland, Private Bag, 92019, Auckland, New Zealand
| | - Siouxsie Wiles
- Bioluminescent Superbugs Lab, Department of Molecular Medicine and Pathology, University of Auckland, Private Bag, 92019, Auckland, New Zealand
| | - Hannah Read
- Bioluminescent Superbugs Lab, Department of Molecular Medicine and Pathology, University of Auckland, Private Bag, 92019, Auckland, New Zealand
| | - Vijayalekshmi Sarojini
- School of Chemical Sciences, University of Auckland, Private Bag, 92019, Auckland, New Zealand.,The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand
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21
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Revisiting hypoxia therapies for tuberculosis. Clin Sci (Lond) 2019; 133:1271-1280. [PMID: 31209098 DOI: 10.1042/cs20190415] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/04/2019] [Accepted: 06/05/2019] [Indexed: 12/19/2022]
Abstract
The spectre of the coming post-antibiotic age demands novel therapies for infectious diseases. Tuberculosis (TB), caused by Mycobacterium tuberculosis, is the single deadliest infection throughout human history. M. tuberculosis has acquired antibiotic resistance at an alarming rate with some strains reported as being totally drug resistant. Host-directed therapies (HDTs) attempt to overcome the evolution of antibiotic resistance by targeting relatively immutable host processes. Here, I hypothesise the induction of hypoxia via anti-angiogenic therapy will be an efficacious HDT against TB. I argue that anti-angiogenic therapy is a modernisation of industrial revolution era sanatoria treatment for TB, and present a view of the TB granuloma as a 'bacterial tumour' that can be treated with anti-angiogenic therapies to reduce bacterial burden and spare host immunopathology. I suggest two complementary modes of action, induction of bacterial dormancy and activation of host hypoxia-induced factor (HIF)-mediated immunity, and define the experimental tools necessary to test this hypothesis.
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22
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Hypoxia increases neutrophil-driven matrix destruction after exposure to Mycobacterium tuberculosis. Sci Rep 2018; 8:11475. [PMID: 30065292 PMCID: PMC6068197 DOI: 10.1038/s41598-018-29659-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 07/11/2018] [Indexed: 01/12/2023] Open
Abstract
The importance of neutrophils in the pathology of tuberculosis (TB) has been recently established. We demonstrated that TB lesions in man are hypoxic, but how neutrophils in hypoxia influence lung tissue damage is unknown. We investigated the effect of hypoxia on neutrophil-derived enzymes and tissue destruction in TB. Human neutrophils were stimulated with M. tuberculosis (M.tb) or conditioned media from M.tb-infected monocytes (CoMTB). Neutrophil matrix metalloproteinase-8/-9 and elastase secretion were analysed by luminex array and gelatin zymography, gene expression by qPCR and cell viability by flow cytometry. Matrix destruction was investigated by confocal microscopy and functional assays and neutrophil extracellular traps (NETs) by fluorescence assay. In hypoxia, neutrophil MMP-8 secretion and gene expression were up-regulated by CoMTB. MMP-9 activity and neutrophil elastase (NE) secretion were also increased in hypoxia. Hypoxia inhibited NET formation and both neutrophil apoptosis and necrosis after direct stimulation by M.tb. Hypoxia increased TB-dependent neutrophil-mediated matrix destruction of Type I collagen, gelatin and elastin, the main structural proteins of the human lung. Dimethyloxalylglycin (DMOG), which stabilizes hypoxia-inducible factor-1α, increased neutrophil MMP-8 and -9 secretion. Hypoxia in our cellular model of TB up-regulated pathways that increase neutrophil secretion of MMPs that are implicated in matrix destruction.
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23
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Pretorius E, Bester J, Kell DB. A Bacterial Component to Alzheimer's-Type Dementia Seen via a Systems Biology Approach that Links Iron Dysregulation and Inflammagen Shedding to Disease. J Alzheimers Dis 2018; 53:1237-56. [PMID: 27340854 PMCID: PMC5325058 DOI: 10.3233/jad-160318] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The progression of Alzheimer's disease (AD) is accompanied by a great many observable changes, both molecular and physiological. These include oxidative stress, neuroinflammation, and (more proximal to cognitive decline) the death of neuronal and other cells. A systems biology approach seeks to organize these observed variables into pathways that discriminate those that are highly involved (i.e., causative) from those that are more usefully recognized as bystander effects. We review the evidence that iron dysregulation is one of the central causative pathway elements here, as this can cause each of the above effects. In addition, we review the evidence that dormant, non-growing bacteria are a crucial feature of AD, that their growth in vivo is normally limited by a lack of free iron, and that it is this iron dysregulation that is an important factor in their resuscitation. Indeed, bacterial cells can be observed by ultrastructural microscopy in the blood of AD patients. A consequence of this is that the growing cells can shed highly inflammatory components such as lipopolysaccharides (LPS). These too are known to be able to induce (apoptotic and pyroptotic) neuronal cell death. There is also evidence that these systems interact with elements of vitamin D metabolism. This integrative systems approach has strong predictive power, indicating (as has indeed been shown) that both natural and pharmaceutical iron chelators might have useful protective roles in arresting cognitive decline, and that a further assessment of the role of microbes in AD development is more than highly warranted.
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Affiliation(s)
- Etheresia Pretorius
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, Arcadia, South Africa
| | - Janette Bester
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, Arcadia, South Africa
| | - Douglas B Kell
- School of Chemistry, The University of Manchester, Manchester, Lancs, UK.,The Manchester Institute of Biotechnology, The University of Manchester, Manchester, Lancs, UK.,Centre for Synthetic Biology of Fine and Speciality Chemicals, The University of Manchester, Manchester, Lancs, UK
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24
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Khan A, Jagannath C. Analysis of host-pathogen modulators of autophagy during Mycobacterium Tuberculosis infection and therapeutic repercussions. Int Rev Immunol 2017; 36:271-286. [PMID: 28976784 DOI: 10.1080/08830185.2017.1356924] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mycobacterium tuberculosis is one of the most deadly human pathogens known today in modern world, responsible for about 1.5 million deaths annually. Development of TB disease occurs only in 1 out of 10 individuals exposed to the pathogen which indicates that the competent host defense mechanisms exist in majority of the hosts to control the infection. In the last decade, autophagy has emerged as a key host immune defense mechanism against intracellular M. tuberculosis infection. Autophagy has been demonstrated not only as an effective antimicrobial mechanism for the clearance of M. tuberculosis, but the process has also been suggested to prevent excessive inflammation to avoid the adverse effects of infection on host. Nevertheless, increasing evidences also show that in order to enhance its intracellular survival, M. tuberculosis has also evolved multiple strategies to compromise the optimal functioning of host autophagic machinery. This review describes an overview of the various host signaling pathways such as pattern recognition receptors, cytokines, nutrient starvation and other cellular stress that have been implicated in induction of autophagy during M. tuberculosis infection. The review also chalk out the complex interplay of several bacterial factors of M. tuberculosis that are known to be involved in compromising autophagy mediated defense of the host. A comprehensive understanding of the interaction of bacterial and host factors at the intersections of autophagic pathways could provide integrative insights for the development of autophagy-based prophylactics and novel therapeutic interventions for TB.
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Affiliation(s)
- Arshad Khan
- a Department of Pathology and Laboratory Medicine, McGovern Medical School , University of Texas Health Sciences Center-Houston , Houston TX
| | - Chinnaswamy Jagannath
- a Department of Pathology and Laboratory Medicine, McGovern Medical School , University of Texas Health Sciences Center-Houston , Houston TX
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25
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Kudryashova E, Seveau SM, Kudryashov DS. Targeting and inactivation of bacterial toxins by human defensins. Biol Chem 2017; 398:1069-1085. [PMID: 28593905 DOI: 10.1515/hsz-2017-0106] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 04/18/2017] [Indexed: 11/15/2022]
Abstract
Defensins, as a prominent family of antimicrobial peptides (AMP), are major effectors of the innate immunity with a broad range of immune modulatory and antimicrobial activities. In particular, defensins are the only recognized fast-response molecules that can neutralize a broad range of bacterial toxins, many of which are among the deadliest compounds on the planet. For a decade, the mystery of how a small and structurally conserved group of peptides can neutralize a heterogeneous group of toxins with little to no sequential and structural similarity remained unresolved. Recently, it was found that defensins recognize and target structural plasticity/thermodynamic instability, fundamental physicochemical properties that unite many bacterial toxins and distinguish them from the majority of host proteins. Binding of human defensins promotes local unfolding of the affected toxins, destabilizes their secondary and tertiary structures, increases susceptibility to proteolysis, and leads to their precipitation. While the details of toxin destabilization by defensins remain obscure, here we briefly review properties and activities of bacterial toxins known to be affected by or resilient to defensins, and discuss how recognized features of defensins correlate with the observed inactivation.
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Immuno-Stimulatory Peptides as a Potential Adjunct Therapy against Intra-Macrophagic Pathogens. Molecules 2017; 22:molecules22081297. [PMID: 28777342 PMCID: PMC6152048 DOI: 10.3390/molecules22081297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 08/03/2017] [Accepted: 08/03/2017] [Indexed: 01/09/2023] Open
Abstract
The treatment of infectious diseases is increasingly prone to failure due to the rapid spread of antibiotic-resistant pathogens. Antimicrobial peptides (AMPs) are natural components of the innate immune system of most living organisms. Their capacity to kill microbes through multiple mechanisms makes the development of bacterial resistance less likely. Additionally, AMPs have important immunomodulatory effects, which critically contribute to their role in host defense. In this paper, we review the most recent evidence for the importance of AMPs in host defense against intracellular pathogens, particularly intra-macrophagic pathogens, such as mycobacteria. Cathelicidins and defensins are reviewed in more detail, due to the abundance of studies on these molecules. The cell-intrinsic as well as the systemic immune-related effects of the different AMPs are discussed. In the face of the strong potential emerging from the reviewed studies, the prospects for future use of AMPs as part of the therapeutic armamentarium against infectious diseases are presented.
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Liu Z, Gao Y, Yang H, Bao H, Qin L, Zhu C, Chen Y, Hu Z. Impact of Hypoxia on Drug Resistance and Growth Characteristics of Mycobacterium tuberculosis Clinical Isolates. PLoS One 2016; 11:e0166052. [PMID: 27835653 PMCID: PMC5106006 DOI: 10.1371/journal.pone.0166052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 10/11/2016] [Indexed: 11/24/2022] Open
Abstract
Mycobacterium tuberculosis (MTB) is a specific aerobic bacterium, but can survive under hypoxic conditions, such as those in lung cheese necrosis, granulomas, or macrophages. It is not clear whether the drug sensitivity and growth characteristics of MTB under hypoxic conditions are different from those under aerobic conditions. In this study, we examined the drug resistance and growth characteristics of MTB clinical isolates by a large sample of in vitro drug susceptibility tests, using an automatic growth instrument. Under hypoxic conditions, variance in drug resistance was observed in nearly one-third of the MTB strains and was defined as MTB strains with changed drug sensitivity (MTB-CDS). Among these strains, resistance in a considerable proportion of clinical strains was significantly increased, and some strains emerged as multi-drug resistant. Growth test results revealed a high growth rate and large survival number in macrophages under hypoxia in MTB-CDS. According to the results of fluorescence quantitative PCR, the expression of some genes, including RegX3 (involving RIF resistance), Rv0194 (efflux pump gene), four genes related to transcription regulation (KstR, DosR, Rv0081 and WhiB3) and gene related to translation regulation (DATIN), were upregulated significantly under hypoxic conditions compared to that under aerobic conditions (p < 0.05). Thus, we concluded that some MTB clinical isolates can survive under hypoxic conditions and their resistance could change. As for poor clinical outcomes in patients, based on routine drug susceptibility testing, drug susceptibility tests for tuberculosis under hypoxic conditions should also be recommended. However, the detailed mechanisms of the effect of hypoxia on drug sensitivity and growth characteristics of MTB clinical isolates still requires further study.
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Affiliation(s)
- Zhonghua Liu
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yulu Gao
- Department of Laboratory Medicine, Kunshan Hospital Affiliated to Nanjing University of Traditional Chinese Medicine, Kunshan, China
| | - Hua Yang
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Haiyang Bao
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lianhua Qin
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Changtai Zhu
- Department of Transfusion, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- * E-mail: (CTZ); (YWC); (ZYH)
| | - Yawen Chen
- Department of Nursing, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- * E-mail: (CTZ); (YWC); (ZYH)
| | - Zhongyi Hu
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
- * E-mail: (CTZ); (YWC); (ZYH)
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Prosser G, Brandenburg J, Reiling N, Barry CE, Wilkinson RJ, Wilkinson KA. The bacillary and macrophage response to hypoxia in tuberculosis and the consequences for T cell antigen recognition. Microbes Infect 2016; 19:177-192. [PMID: 27780773 PMCID: PMC5335906 DOI: 10.1016/j.micinf.2016.10.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 10/06/2016] [Indexed: 12/11/2022]
Abstract
Mycobacterium tuberculosis is a facultative anaerobe and its characteristic pathological hallmark, the granuloma, exhibits hypoxia in humans and in most experimental models. Thus the host and bacillary adaptation to hypoxia is of central importance in understanding pathogenesis and thereby to derive new drug treatments and vaccines.
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Affiliation(s)
- Gareth Prosser
- Tuberculosis Research Section, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, United States
| | - Julius Brandenburg
- Microbial Interface Biology, Priority Research Area Infections, Forschungszentrum Borstel, Leibniz Center for Medicine and Biosciences, Parkallee 1-40, D-23845, Borstel, Germany
| | - Norbert Reiling
- Microbial Interface Biology, Priority Research Area Infections, Forschungszentrum Borstel, Leibniz Center for Medicine and Biosciences, Parkallee 1-40, D-23845, Borstel, Germany; German Center for Infection Research (DZIF), Partner Site Hamburg-Borstel-Lübeck, Borstel, Germany
| | - Clifton Earl Barry
- Tuberculosis Research Section, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, United States; Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, 7925, South Africa
| | - Robert J Wilkinson
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, 7925, South Africa; The Francis Crick Institute, London, NW1 2AT, United Kingdom; Department of Medicine, Imperial College, London, W2 1PG, United Kingdom.
| | - Katalin A Wilkinson
- Clinical Infectious Diseases Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, 7925, South Africa; The Francis Crick Institute, London, NW1 2AT, United Kingdom
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Matta SK, Kumar D. Hypoxia and classical activation limits Mycobacterium tuberculosis survival by Akt-dependent glycolytic shift in macrophages. Cell Death Discov 2016; 2:16022. [PMID: 27551515 PMCID: PMC4979487 DOI: 10.1038/cddiscovery.2016.22] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 02/18/2016] [Accepted: 03/02/2016] [Indexed: 02/08/2023] Open
Abstract
Cellular reactive oxygen species (ROS) is a major antibacterial defense mechanism used by macrophages upon activation. Exposure of Mycobacterium tuberculosis (Mtb)-infected macrophages to hypoxia is known to compromise the survival of the pathogen. Here we report that the hypoxia-induced control of intracellular Mtb load in RAW 264.7 macrophages was mediated by regulating the cellular ROS levels. We show that similar to classical activation, hypoxia incubation of macrophages resulted in decreased mitochondrial outer membrane potential (MOMP) and a concomitant increase in the cellular ROS levels. Mitochondrial depolarization and consequently higher ROS could be blocked by knocking down Akt using siRNAs, which acted by inhibiting the switch to glycolytic mode of metabolism, an essential adaptive response upon classical activation or hypoxic incubation of macrophages. Moreover, in the classically activated macrophages or in the macrophages under hypoxia incubation, supplementation with additional glucose had similar effects as Akt knockdown. Interestingly, in both the cases, the reversal of phenotype was linked with the ability of the mitochondrial F0–F1 ATP synthase activity to maintain the MOMP in the absence of oxidative phosphorylation. Both Akt knockdown and glucose supplementation were also able to rescue Mtb survival in these macrophages upon classical activation or hypoxia incubation. These results provide a framework for better understanding of how the interplay between oxygen supply, which is limiting in the human tubercular granulomas, and nutrient availability could together direct the outcome of infections in vivo.
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Affiliation(s)
- S K Matta
- Cellular Immunology Group, International Centre for Genetic Engineering and Biotechnology , Aruna Asaf Ali Marg, New Delhi 110067, India
| | - D Kumar
- Cellular Immunology Group, International Centre for Genetic Engineering and Biotechnology , Aruna Asaf Ali Marg, New Delhi 110067, India
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Gutsmann T. Interaction between antimicrobial peptides and mycobacteria. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:1034-43. [PMID: 26851776 DOI: 10.1016/j.bbamem.2016.01.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 01/29/2016] [Accepted: 01/31/2016] [Indexed: 01/21/2023]
Abstract
Mycobacteria can cause different severe health problems, including tuberculosis (TB). The treatment of TB with conventional antibiotics is successful, however, the number of multi-drug and extensively-drug resistant Mycobacterium tuberculosis strains increases. Moreover, many classical antimycobacterial antibiotics have severe side effects. Therefore, antimicrobial peptides (AMPs) seem to be good candidates for new therapeutic strategies. On the one hand AMPs can be used as a single drug or in combination with conventional antibiotics to directly kill mycobacteria, or on the other hand to act as immunstimulatory agents. This review summarizes the findings on the role of endogenous human AMPs being involved in TB, the antimycobacterial activity of various AMPs, and the molecular modes of action. Most active AMPs interact with the mycobacterial cell envelope and in particular with the mycomembrane and the plasma membrane. The mycomembrane is a very rigid membrane probably leading to a lower activity of the AMPs against mycobacteria as compared to other Gram-negative or Gram-positive bacteria. For some AMPs also other targets have been identified. Because of the complex environment of intracellular mycobacteria being trapped in the phagosome, within the macrophage, within the granuloma, within the lung, the external administration of AMPs in the latent phase of TB is a challenge. However, in the acute phase the AMPs can attack mycobacteria in a direct way. This article is part of a Special Issue entitled: Antimicrobial peptides edited by Karl Lohner and Kai Hilpert.
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Affiliation(s)
- Thomas Gutsmann
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Priority Area Infections, Division of Biophysics, Parkallee 10, 23845 Borstel, Germany.
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Zenk SF, Vollmer M, Schercher E, Kallert S, Kubis J, Stenger S. Hypoxia promotes Mycobacterium tuberculosis-specific up-regulation of granulysin in human T cells. Med Microbiol Immunol 2015; 205:219-29. [PMID: 26613797 DOI: 10.1007/s00430-015-0442-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 11/16/2015] [Indexed: 12/18/2022]
Abstract
Oxygen tension affects local immune responses in inflammation and infection. In tuberculosis mycobacteria avoid hypoxic areas and preferentially persist and reactivate in the oxygen-rich apex of the lung. Oxygen restriction activates antimicrobial effector mechanisms in macrophages and restricts growth of intracellular Mycobacterium tuberculosis (M.Tb). The effect of oxygen restriction on T cell-mediated antimicrobial effector mechanisms is unknown. Therefore we determined the influence of hypoxia on the expression of granulysin, an antimicrobial peptide of lymphocytes. Hypoxia increased the antigen-specific up-regulation of granulysin mRNA and protein in human CD4(+) and CD8(+) T lymphocytes. This observation was functionally relevant, because oxygen restriction supported the growth-limiting effect of antigen-specific T cells against virulent M.Tb residing in primary human macrophages. Our results provide evidence that oxygen restriction promotes the expression of granulysin and suggest that this effect-in conjunction with additional T cell-mediated immune responses-supports protection against mycobacteria. The therapeutic modulation of oxygen availability may offer a new strategy for the host-directed therapy of infectious diseases with intracellular pathogens.
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Affiliation(s)
- Sebastian F Zenk
- Institut für Medizinische Mikrobiologie und Hygiene, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Michael Vollmer
- Institut für Medizinische Mikrobiologie und Hygiene, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Esra Schercher
- Institut für Medizinische Mikrobiologie und Hygiene, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Stephanie Kallert
- Institut für Medizinische Mikrobiologie und Hygiene, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Jan Kubis
- Institut für Medizinische Mikrobiologie und Hygiene, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Steffen Stenger
- Institut für Medizinische Mikrobiologie und Hygiene, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany.
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Jiang TT, Wang C, Wei LL, Yu XM, Shi LY, Xu DD, Chen ZL, Ping ZP, Li JC. Serum protein gamma-glutamyl hydrolase, Ig gamma-3 chain C region, and haptoglobin are associated with the syndromes of pulmonary tuberculosis in traditional Chinese medicine. Altern Ther Health Med 2015. [PMID: 26198726 PMCID: PMC4509701 DOI: 10.1186/s12906-015-0686-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Background Traditional Chinese Medicine (TCM) has been applied in treating tuberculosis (TB) based on the TCM syndromes with the effects of inhibiting Mycobacterium, strengthening the body immune system, and reducing the pulmonary toxicity. We used bioinformatic methods to study the clinical and pathological characteristics of pulmonary TB patients with TCM syndromes. Isobaric tags for relative and absolute quantification - coupled two dimensional liquid chromatography-tandem mass spectrometry (iTRAQ-2DLC-MS/MS) methods were applied to screen differentially expressed serum proteins. Methods Pulmonary TB cases were divided into four distinctive TCM syndromes: pulmonary Yin deficiency (PYD) syndrome, hyperactivity of fire due to Yin deficiency (HFYD) syndrome, deficiency of Qi and Yin (DQY) syndrome, and deficiency of Yin and Yang (DYY) syndrome. The serum samples from 214 pulmonary TB patients were collected, and the clinical and pathological data was analyzed by using iTRAQ-2DLC-MS/MS. Finally, the differentially expressed proteins were screened and tested by ELISA. Only 5 patients with DYY syndrome were recruited in 3 years, which were not enough for further research. Results The DQY cases had higher erythrocyte sedimentation rate (ESR) compared to the PYD and HFYD cases (P = 0.0178). 94.44 % (12 PYD, 18 HFYD, and 4 DQY before anti-TB treatment) of 36 treated TB cases were transformed to PYD accompanied with the reduction of ESR and absorption of pulmonary lesions. A total of 39 differentially expressed proteins (ratios of >1.3 or <0.75) were found among the three TCM syndromes. Proteomic studies revealed that gamma-glutamyl hydrolase (GGH), Ig gamma-3 chain C region (IGHG3), and haptoglobin (HPT) were specifically over-expressed in PYD (P < 0.01), HFYD (P < 0.001), and DQY cases (P < 0.01), respectively. Furthermore, GGH was significantly higher in PYD cases compared to the HFYD and DQY cases (P < 0.01, P < 0.001, respectively), whereas IGHG3 was significantly higher in HFYD cases than PYD and DQY cases (P < 0.001, P < 0.01, respectively). Conclusions The results suggest that TCM syndromes are significantly correlated with the pulmonary lesions and ESR. GGH was associated with folate metabolism in PYD cases, IGHG3 was linked to the control of Mycobacterium infection in HFYD patients, and HPT was involved in hypoxia in DQY patients. The present study provides new biological basis to understand the pathological changes and proteomic differences of TB syndromes. Electronic supplementary material The online version of this article (doi:10.1186/s12906-015-0686-4) contains supplementary material, which is available to authorized users.
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Jennewein J, Matuszak J, Walter S, Felmy B, Gendera K, Schatz V, Nowottny M, Liebsch G, Hensel M, Hardt WD, Gerlach RG, Jantsch J. Low-oxygen tensions found in Salmonella-infected gut tissue boost Salmonella replication in macrophages by impairing antimicrobial activity and augmenting Salmonella virulence. Cell Microbiol 2015; 17:1833-47. [PMID: 26104016 DOI: 10.1111/cmi.12476] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 05/17/2015] [Accepted: 06/18/2015] [Indexed: 12/28/2022]
Abstract
In Salmonella infection, the Salmonella pathogenicity island-2 (SPI-2)-encoded type three secretion system (T3SS2) is of key importance for systemic disease and survival in host cells. For instance, in the streptomycin-pretreated mouse model SPI-2-dependent Salmonella replication in lamina propria CD11c(-)CXCR1(-) monocytic phagocytes/macrophages (MΦ) is required for the development of colitis. In addition, containment of intracellular Salmonella in the gut critically depends on the antimicrobial effects of the phagocyte NADPH oxidase (PHOX), and possibly type 2 nitric oxide synthase (NOS2). For both antimicrobial enzyme complexes, oxygen is an essential substrate. However, the amount of available oxygen upon enteroinvasive Salmonella infection in the gut tissue and its impact on Salmonella-MΦ interactions was unknown. Therefore, we measured the gut tissue oxygen levels in a model of Salmonella enterocolitis using luminescence two-dimensional in vivo oxygen imaging. We found that gut tissue oxygen levels dropped from ∼78 Torr (∼11% O2) to values of ∼16 Torr (∼2% O2) during infection. Because in vivo virulence of Salmonella depends on the Salmonella survival in MΦ, Salmonella-MΦ interaction was analysed under such low oxygen values. These experiments revealed an increased intracellular replication and survival of wild-type and t3ss2 non-expressing Salmonella. These findings were paralleled by blunted nitric oxide and reactive oxygen species (ROS) production and reduced Salmonella ROS perception. In addition, hypoxia enhanced SPI-2 transcription and translocation of SPI-2-encoded virulence protein. Neither pharmacological blockade of PHOX and NOS2 nor impairment of T3SS2 virulence function alone mimicked the effect of hypoxia on Salmonella replication under normoxic conditions. However, if t3ss2 non-expressing Salmonella were used, hypoxia did not further enhance Salmonella recovery in a PHOX and NOS2-deficient situation. Hence, these data suggest that hypoxia-induced impairment of antimicrobial activity and Salmonella virulence cooperate to allow for enhanced Salmonella replication in MΦ.
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Affiliation(s)
- Jonas Jennewein
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Erlangen und Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany.,Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Regensburg und Universität Regensburg, Regensburg, Germany
| | - Jasmin Matuszak
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Erlangen und Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Steffi Walter
- Robert Koch-Institut, Bereich Wernigerode, Wernigerode, Germany
| | - Boas Felmy
- Institut für Mikrobiologie, ETH Zürich, Zürich, Switzerland
| | - Kathrin Gendera
- Robert Koch-Institut, Bereich Wernigerode, Wernigerode, Germany
| | - Valentin Schatz
- Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Regensburg und Universität Regensburg, Regensburg, Germany
| | - Monika Nowottny
- Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Regensburg und Universität Regensburg, Regensburg, Germany
| | | | - Michael Hensel
- Abteilung Mikrobiologie, Fachbereich Biologie / Chemie, Universität Osnabrück, Osnabrück, Germany
| | | | - Roman G Gerlach
- Robert Koch-Institut, Bereich Wernigerode, Wernigerode, Germany
| | - Jonathan Jantsch
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Erlangen und Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany.,Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Regensburg und Universität Regensburg, Regensburg, Germany
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Bruns H, Stenger S. New insights into the interaction of Mycobacterium tuberculosis and human macrophages. Future Microbiol 2015; 9:327-41. [PMID: 24762307 DOI: 10.2217/fmb.13.164] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Mycobacterium tuberculosis is a facultative intracellular pathogen. It infects macrophages where it avoids elimination by interfering with host defense mechanisms. Until recently, it was assumed that the acidification of phagosomes is the major strategy of macrophages to eliminate M. tuberculosis. However, there is emerging evidence demonstrating that human macrophages are equipped with additional antimicrobial effector functions. Specifically, autophagy, efferocytosis and antimicrobial peptides have been identified as mechanisms to restrict mycobacterial proliferation. Here we review recent findings on effector functions of human macrophages and mechanisms of the pathogen to interfere with them.
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Affiliation(s)
- Heiko Bruns
- Department of Internal Medicine 5 - Hematology/Oncology, University of Erlangen, Germany
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Tazzyman S, Murdoch C, Yeomans J, Harrison J, Muthana M. Macrophage-mediated response to hypoxia in disease. HYPOXIA 2014; 2:185-196. [PMID: 27774476 PMCID: PMC5045066 DOI: 10.2147/hp.s49717] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Hypoxia plays a critical role in the pathobiology of various inflamed, diseased tissues, including malignant tumors, atherosclerotic plaques, myocardial infarcts, the synovia of rheumatoid arthritic joints, healing wounds, and sites of bacterial infection. These areas of hypoxia form when the blood supply is occluded and/or the oxygen supply is unable to keep pace with cell growth and/or infiltration of inflammatory cells. Macrophages are ubiquitous in all tissues of the body and exhibit great plasticity, allowing them to perform divergent functions, including, among others, patrolling tissue, combating invading pathogens and tumor cells, orchestrating wound healing, and restoring homeostasis after an inflammatory response. The number of tissue macrophages increases markedly with the onset and progression of many pathological states, with many macrophages accumulating in avascular and necrotic areas, where they are exposed to hypoxia. Recent studies show that these highly versatile cells then respond rapidly to the hypoxia present by altering their expression of a wide array of genes. Here we review the evidence for hypoxia-driven macrophage inflammatory responses in various disease states, and how this influences disease progression and treatment.
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Affiliation(s)
| | | | | | | | - Munitta Muthana
- Department of Infection and Immunity, University of Sheffield, Sheffield, UK
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Mangin M, Sinha R, Fincher K. Inflammation and vitamin D: the infection connection. Inflamm Res 2014; 63:803-19. [PMID: 25048990 PMCID: PMC4160567 DOI: 10.1007/s00011-014-0755-z] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 06/04/2014] [Accepted: 06/23/2014] [Indexed: 12/11/2022] Open
Abstract
INTRODUCTION Inflammation is believed to be a contributing factor to many chronic diseases. The influence of vitamin D deficiency on inflammation is being explored but studies have not demonstrated a causative effect. METHODS Low serum 25(OH)D is also found in healthy persons exposed to adequate sunlight. Despite increased vitamin D supplementation inflammatory diseases are increasing. The current method of determining vitamin D status may be at fault. The level of 25(OH)D does not always reflect the level of 1,25(OH)2D. Assessment of both metabolites often reveals elevated 1,25(OH)2D, indicating abnormal vitamin D endocrine function. FINDINGS This article reviews vitamin D's influence on the immune system, examines the myths regarding vitamin D photosynthesis, discusses ways to accurately assess vitamin D status, describes the risks of supplementation, explains the effect of persistent infection on vitamin D metabolism and presents a novel immunotherapy which provides evidence of an infection connection to inflammation. CONCLUSION Some authorities now believe that low 25(OH)D is a consequence of chronic inflammation rather than the cause. Research points to a bacterial etiology pathogenesis for an inflammatory disease process which results in high 1,25(OH)2D and low 25(OH)D. Immunotherapy, directed at eradicating persistent intracellular pathogens, corrects dysregulated vitamin D metabolism and resolves inflammatory symptoms.
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Affiliation(s)
- Meg Mangin
- Chronic Illness Recovery, Fort Worth, Texas, USA,
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Jantsch J, Schödel J. Hypoxia and hypoxia-inducible factors in myeloid cell-driven host defense and tissue homeostasis. Immunobiology 2014; 220:305-14. [PMID: 25439732 DOI: 10.1016/j.imbio.2014.09.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 08/01/2014] [Accepted: 09/05/2014] [Indexed: 02/08/2023]
Abstract
The impact of tissue oxygenation and hypoxia on immune cells has been recognized as a major determinant of host defense and tissue homeostasis. In this review, we will summarize the available data on tissue oxygenation in inflamed and infected tissue and the effect of low tissue oxygenation on myeloid cell function. Furthermore, we will highlight effects of the master regulators of the cellular hypoxic response, hypoxia-inducible transcription factors (HIF), in myeloid cells in antimicrobial defense and tissue homeostasis.
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Affiliation(s)
- Jonathan Jantsch
- Institut für Klinische Mikrobiologie und Hygiene, Universitätsklinikum Regensburg, Germany; Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen und Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany.
| | - Johannes Schödel
- Medizinische Klinik 4, Universitätsklinikum Erlangen und Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany; Translational Research Center, Universitätsklinikum Erlangen und Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany.
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38
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Mahnke A, Meier RJ, Schatz V, Hofmann J, Castiglione K, Schleicher U, Wolfbeis OS, Bogdan C, Jantsch J. Hypoxia in Leishmania major Skin Lesions Impairs the NO-Dependent Leishmanicidal Activity of Macrophages. J Invest Dermatol 2014; 134:2339-2346. [DOI: 10.1038/jid.2014.121] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 02/03/2014] [Accepted: 02/15/2014] [Indexed: 12/22/2022]
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Padhi A, Sengupta M, Sengupta S, Roehm KH, Sonawane A. Antimicrobial peptides and proteins in mycobacterial therapy: Current status and future prospects. Tuberculosis (Edinb) 2014; 94:363-73. [DOI: 10.1016/j.tube.2014.03.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 03/17/2014] [Accepted: 03/20/2014] [Indexed: 12/30/2022]
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40
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Harris AJ, Thompson AR, Whyte MK, Walmsley SR. HIF-mediated innate immune responses: cell signaling and therapeutic implications. HYPOXIA 2014; 2:47-58. [PMID: 27774466 PMCID: PMC5045056 DOI: 10.2147/hp.s50269] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Leukocytes recruited to infected, damaged, or inflamed tissues during an immune response must adapt to oxygen levels much lower than those in the circulation. Hypoxia inducible factors (HIFs) are key mediators of cellular responses to hypoxia and, as in other cell types, HIFs are critical for the upregulation of glycolysis, which enables innate immune cells to produce adenosine triphosphate anaerobically. An increasing body of evidence demonstrates that hypoxia also regulates many other innate immunological functions, including cell migration, apoptosis, phagocytosis of pathogens, antigen presentation and production of cytokines, chemokines, and angiogenic and antimicrobial factors. Many of these functions are mediated by HIFs, which are not only stabilized posttranslationally by hypoxia, but also transcriptionally upregulated by inflammatory signals. Here, we review the role of HIFs in the responses of innate immune cells to hypoxia, both in vitro and in vivo, with a particular focus on myeloid cells, on which the majority of studies have so far been carried out.
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Affiliation(s)
- Alison J Harris
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield, UK
| | - Aa Roger Thompson
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield, UK
| | - Moira Kb Whyte
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield, UK
| | - Sarah R Walmsley
- Academic Unit of Respiratory Medicine, Department of Infection and Immunity, University of Sheffield, Sheffield, UK
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Kang J, Zhao D, Lyu Y, Tian L, Yin X, Yang L, Teng K, Zhou X. Antimycobacterial activity of Pichia pastoris-derived mature bovine neutrophil β-defensins 5. Eur J Clin Microbiol Infect Dis 2014; 33:1823-34. [PMID: 24839955 DOI: 10.1007/s10096-014-2152-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Accepted: 04/30/2014] [Indexed: 11/25/2022]
Abstract
Tuberculosis (TB) is an ongoing threat to global health, and the lack of effective therapies for treating it is also a global problem. Previous studies have shown that human cathelicidin and defensins have effective antimicrobial activity against Mycobacterium spp. To our knowledge, there are no reports on the antimycobacterial effects of bovine neutrophil β-defensins so far. Here, we identified the antimicrobial effect of mature bovine neutrophil β-defensins (mBNBD) 5 against Mycobacterium infection both in vitro and in vivo. The mBNBD5 protein was expressed in Pichia pastoris. To increase the yield of β-defensins, a purification method was employed by adding a 6-His·tag to the C-terminus of the mBNBD5 gene. Our results indicated that recombinant mBNBD5 protein was successfully expressed and purified from Pichia pastoris with intact antimicrobial activity. The recombinant protein exhibited potent bactericidal activity in vitro against M. smegmatis and M. bovis, with a dose-dependent manner and a time-dependent manner. The electron microscope results showed that the bacterial cell wall of M. bovis was disrupted when incubated with mBNBD5 for 72 h. Our data also indicated that the exogenous addition of mBNBD5 could reduce the survival of Mycobacterium spp., especially M. tuberculosis and M. bovis in RAW 264.7 macrophages. These results provide foundations for the development of mBNBD5 as a potential new therapeutic agent for TB treatment.
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Affiliation(s)
- J Kang
- The State Key Lab of Agrobiotechnology; Key Lab of Animal Epidemiology and Zoonosis, Ministry of Agriculture; National Animal Transmissible Spongiform Encephalopathy Laboratory; College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China,
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42
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Gautam US, Mehra S, Ahsan MH, Alvarez X, Niu T, Kaushal D. Role of TNF in the altered interaction of dormant Mycobacterium tuberculosis with host macrophages. PLoS One 2014; 9:e95220. [PMID: 24743303 PMCID: PMC3990579 DOI: 10.1371/journal.pone.0095220] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 03/24/2014] [Indexed: 02/07/2023] Open
Abstract
Mycobacterium tuberculosis (Mtb) persists within lung granulomas, despite being subjected to diverse stress conditions, including hypoxia. We hypothesized that the response of host phagocytes to Mtb experiencing hypoxia is radically altered and designed in vitro experiment to study this phenomenon. Hypoxia-stressed (Mtb-H) and aerobically grown Mtb (Mtb-A) were used to infect Rhesus Macaque Bone Marrow Derived Macrophages (Rh-BMDMs) and the comparative host response to Mtb infection studied. Mechanistic insights were gained by employing RNAi. Mtb-H accumulated significantly lower bacterial burden during growth in Rh-BMDMs, concomitantly generating a drastically different host transcriptional profile (with only <2% of all genes perturbed by either infection being shared between the two groups). A key component of this signature was significantly higher TNF and apopotosis in Mtb-H- compared to Mtb-A-infected Rh-BMDMs. Silencing of TNF by RNAi reversed the significant control of Mtb replication. These results indicate a potential mechanism for the rapid clearance of hypoxia-conditioned bacilli by phagocytes. In conclusion, hypoxia-conditioned Mtb undergo significantly different interactions with host macrophages compared to Mtb grown in normoxia. These interactions result in the induction of the TNF signaling pathway, activation of apoptosis, and DNA-damage stress response. Our results show that Mtb-H bacilli are particularly susceptible to killing governed by TNF.
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Affiliation(s)
- Uma S. Gautam
- Division of Bacteriology and Parasitology, Tulane National Primate Research Center, Covington, Louisiana, United States of America
| | - Smriti Mehra
- Department of Microbiology, Tulane National Primate Research Center, Covington, Louisiana, United States of America
| | - Muhammad H. Ahsan
- Division of Bacteriology and Parasitology, Tulane National Primate Research Center, Covington, Louisiana, United States of America
| | - Xavier Alvarez
- Department of Comparative Pathology, Tulane National Primate Research Center, Covington, Louisiana, United States of America
| | - Tianhua Niu
- Department of Biostatistics and Bioinformatics, Tulane University School of Public Health and Tropical Medicine
| | - Deepak Kaushal
- Division of Bacteriology and Parasitology, Tulane National Primate Research Center, Covington, Louisiana, United States of America
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
- * E-mail:
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43
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García-Berrocoso T, Giralt D, Bustamante A, Llombart V, Rubiera M, Penalba A, Boada C, Espadaler M, Molina C, Montaner J. Role of beta-defensin 2 and interleukin-4 receptor as stroke outcome biomarkers. J Neurochem 2014; 129:463-72. [DOI: 10.1111/jnc.12649] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 11/18/2013] [Accepted: 12/29/2013] [Indexed: 01/03/2023]
Affiliation(s)
- Teresa García-Berrocoso
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
| | - Dolors Giralt
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
| | - Alejandro Bustamante
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
| | - Victor Llombart
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
| | - Marta Rubiera
- Neurovascular Unit; Department of Neurology; Vall d'Hebron University Hospital; Barcelona Spain
| | - Anna Penalba
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
| | - Cristina Boada
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
| | - Marc Espadaler
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
| | - Carlos Molina
- Neurovascular Unit; Department of Neurology; Vall d'Hebron University Hospital; Barcelona Spain
| | - Joan Montaner
- Neurovascular Research Laboratory; Vall d'Hebron Institute of Research (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
- Neurovascular Unit; Department of Neurology; Vall d'Hebron University Hospital; Barcelona Spain
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Immunostimulation in the treatment for chronic fatigue syndrome/myalgic encephalomyelitis. Immunol Res 2014; 56:398-412. [PMID: 23576059 DOI: 10.1007/s12026-013-8413-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chronic fatigue syndrome (CFS)/myalgic encephalomyelitis (ME) has long been associated with the presence of infectious agents, but no single pathogen has been reliably identified in all patients with the disease. Recent studies using metagenomic techniques have demonstrated the presence of thousands of microbes in the human body that were previously undetected and unknown to science. More importantly, such species interact together by sharing genes and genetic function within communities. It follows that searching for a singular pathogen may greatly underestimate the microbial complexity potentially driving a complex disease like CFS/ME. Intracellular microbes alter the expression of human genes in order to facilitate their survival. We have put forth a model describing how multiple species-bacterial, viral, and fungal-can cumulatively dysregulate expression by the VDR nuclear receptor in order to survive and thus drive a disease process. Based on this model, we have developed an immunostimulatory therapy that is showing promise inducing both subjective and objective improvement in patients suffering from CFS/ME.
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45
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Meade KG, Cormican P, Narciandi F, Lloyd A, O'Farrelly C. Bovine β-defensin gene family: opportunities to improve animal health? Physiol Genomics 2014; 46:17-28. [DOI: 10.1152/physiolgenomics.00085.2013] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Recent analysis of the bovine genome revealed an expanded suite of β-defensin genes that encode what are referred to as antimicrobial or host defense peptides (HDPs). Whereas primate genomes also encode α- and θ-defensins, the bovine genome contains only the β-defensin subfamily of HDPs. β-Defensins perform diverse functions that are critical to protection against pathogens but also in regulation of the immune response and reproduction. As the most comprehensively studied subclass of HDPs, β-defensins possess the widest taxonomic distribution, found in invertebrates as well as plants, indicating an ancient point of origin. Cross-species comparison of the genomic arrangement of β-defensin gene repertoire revealed them to vary in number among species presumably due to differences in pathogenic selective pressures but also genetic drift. β-Defensin genes exist in a single cluster in birds, but four gene clusters exist in dog, rat, mouse, and cow. In humans and chimpanzees, one of these clusters is split in two as a result of a primate-specific pericentric inversion producing five gene clusters. A cluster of β-defensin genes on bovine chromosome 13 has been recently characterized, and full genome sequencing has identified extensive gene copy number variation on chromosome 27. As a result, cattle have the most diverse repertoire of β-defensin genes so far identified, where four clusters contain at least 57 genes. This expansion of β-defensin HDPs may hold significant potential for combating infectious diseases and provides opportunities to harness their immunological and reproductive functions in commercial cattle populations.
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Affiliation(s)
- K. G. Meade
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - P. Cormican
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - F. Narciandi
- Comparative Immunology Group, School of Biochemistry and Immunology, Trinity College, Dublin, Ireland; and
| | - A. Lloyd
- Department of Science & Health, Carlow Institute of Technology, Co. Carlow, Ireland
| | - C. O'Farrelly
- Comparative Immunology Group, School of Biochemistry and Immunology, Trinity College, Dublin, Ireland; and
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46
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Eisen S, Pealing L, Aldridge RW, Siedner MJ, Necochea A, Leybell I, Valencia T, Herrera B, Wiles S, Friedland JS, Gilman RH, Evans CA. Effects of ascent to high altitude on human antimycobacterial immunity. PLoS One 2013; 8:e74220. [PMID: 24058530 PMCID: PMC3772817 DOI: 10.1371/journal.pone.0074220] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Accepted: 07/29/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Tuberculosis infection, disease and mortality are all less common at high than low altitude and ascent to high altitude was historically recommended for treatment. The immunological and mycobacterial mechanisms underlying the association between altitude and tuberculosis are unclear. We studied the effects of altitude on mycobacteria and antimycobacterial immunity. METHODS Antimycobacterial immunity was assayed in 15 healthy adults residing at low altitude before and after they ascended to 3400 meters; and in 47 long-term high-altitude residents. Antimycobacterial immunity was assessed as the extent to which participants' whole blood supported or restricted growth of genetically modified luminescent Bacille Calmette-Guérin (BCG) mycobacteria during 96 hours incubation. We developed a simplified whole blood assay that could be used by a technician in a low-technology setting. We used this to compare mycobacterial growth in participants' whole blood versus positive-control culture broth and versus negative-control plasma. RESULTS Measurements of mycobacterial luminescence predicted the number of mycobacterial colonies cultured six weeks later. At low altitude, mycobacteria grew in blood at similar rates to positive-control culture broth whereas ascent to high altitude was associated with restriction (p ≤ 0.002) of mycobacterial growth to be 4-times less than in culture broth. At low altitude, mycobacteria grew in blood 25-times more than negative-control plasma whereas ascent to high altitude was associated with restriction (p ≤ 0.01) of mycobacterial growth to be only 6-times more than in plasma. There was no evidence of differences in antimycobacterial immunity at high altitude between people who had recently ascended to high altitude versus long-term high-altitude residents. CONCLUSIONS An assay of luminescent mycobacterial growth in whole blood was adapted and found to be feasible in low-resource settings. This demonstrated that ascent to or residence at high altitude was associated with decreased mycobacterial growth in whole blood relative to controls, consistent with altitude-related augmentation of antimycobacterial cellular immunity.
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Affiliation(s)
- Sarah Eisen
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Research Department of Infection and Population Health and the School of Medicine, University College London, London, United Kingdom
| | - Louise Pealing
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Research Department of Infection and Population Health and the School of Medicine, University College London, London, United Kingdom
| | - Robert W. Aldridge
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Research Department of Infection and Population Health and the School of Medicine, University College London, London, United Kingdom
| | - Mark J. Siedner
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Innovacion Por la Salud Y el Desarollo (IPSYD), Asociación Benefica Prisma, Lima, Peru
| | - Alejandro Necochea
- Yale School of Medicine, New Haven, Connecticut, United States of America
| | - Inna Leybell
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Innovacion Por la Salud Y el Desarollo (IPSYD), Asociación Benefica Prisma, Lima, Peru
| | - Teresa Valencia
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Innovacion Por la Salud Y el Desarollo (IPSYD), Asociación Benefica Prisma, Lima, Peru
| | - Beatriz Herrera
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Innovacion Por la Salud Y el Desarollo (IPSYD), Asociación Benefica Prisma, Lima, Peru
| | - Siouxsie Wiles
- Infectious Diseases & Immunity, Imperial College London and Wellcome Trust Imperial College Centre for Global Health Research, London, United Kingdom
| | - Jon S. Friedland
- Infectious Diseases & Immunity, Imperial College London and Wellcome Trust Imperial College Centre for Global Health Research, London, United Kingdom
| | - Robert H. Gilman
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | - Carlton A. Evans
- IFHAD: Innovation For Health And Development, Laboratory of Research and Development 218, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, Peru
- Infectious Diseases & Immunity, Imperial College London and Wellcome Trust Imperial College Centre for Global Health Research, London, United Kingdom
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47
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Giorgio S. Macrophages: plastic solutions to environmental heterogeneity. Inflamm Res 2013; 62:835-43. [DOI: 10.1007/s00011-013-0647-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/05/2013] [Indexed: 12/14/2022] Open
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Role of oxidative stress in infectious diseases. A review. Folia Microbiol (Praha) 2013; 58:503-13. [PMID: 23504625 DOI: 10.1007/s12223-013-0239-5] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 03/05/2013] [Indexed: 12/30/2022]
Abstract
Oxidative stress plays a dual role in infections. Free radicals protect against invading microorganisms, and they can also cause tissue damage during the resulting inflammation. In the process of infection, there is generation of reactive species by myeloperoxidase, NADPH oxidase, and nitric oxide synthase. On the other hand, reactive species can be generated among others, by cytochrome P450, some metals, and xanthine oxidase. Some pathologies arising during infection can be attributed to oxidative stress and generation of reactive species in infection can even have fatal consequences. This article reviews the basic pathways in which reactive species can accumulate during infectious diseases and discusses the related health consequences.
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Riboldi E, Porta C, Morlacchi S, Viola A, Mantovani A, Sica A. Hypoxia-mediated regulation of macrophage functions in pathophysiology. Int Immunol 2012. [PMID: 23179187 DOI: 10.1093/intimm/dxs110] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Oxygen availability affects cell differentiation, survival and function, with profound consequences on tissue homeostasis, inflammation and immunity. A gradient of oxygen levels is present in most organs of the body as well as in virtually every site of inflammation, damaged or pathological tissue. As a consequence, infiltrating leukocytes, macrophages in particular, are equipped with the capacity to shift their metabolism to anaerobic glycolysis, to generate ATP and induce the expression of factors that increase the supply of oxygen and nutrients. Strikingly, low oxygen conditions (hypoxia) and inflammatory signals share selected transcriptional events, including the activation of members of both the hypoxia-inducible factor and nuclear factor κB families, which may converge to activate specific cell programs. In the pathological response to hypoxia, cancer in particular, macrophages act as orchestrators of disease evolution and their number can be used as a prognostic marker. Here we review mechanisms of macrophage adaptation to hypoxia, their role in disease as well as new perspectives for their therapeutic targeting.
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Affiliation(s)
- Elena Riboldi
- Department of Pharmaceutical Sciences, Università del Piemonte Orientale 'Amedeo Avogadro', Novara 28100, Italy
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