1
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Meyers M, Salmon M, Libert I, Klášterský J. A meta-analysis on the risk of infection associated with intravenous iron therapy in cancer-associated anaemia: a double-edged sword? Curr Opin Oncol 2024; 36:223-232. [PMID: 38842015 DOI: 10.1097/cco.0000000000001024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
PURPOSE OF REVIEW The increased use of i.v. iron in the treatment of cancer-associated anemia raises concerns about its risk of infectious complications. High levels of circulating iron could increase the risk of infection by compromising natural defence mechanisms and promoting pathogen growth. Since the risk of infection is particularly high in the oncological population, we have examined whether the use of i.v. iron increases the risk of infectious complications among cancer patients. FINDINGS Among 18 randomized trials in our systematic review, only 8 reported infectious complications, with no significant difference linked to the type of i.v. iron preparation. Two trials showed a statistically significant increase in infectious complications, one trial found a lower risk, while the remaining 5 reported no significant difference. Our meta-analysis revealed a numerical increase in infectious complications in the i.v. iron group, but the lack of statistical significance and significant heterogeneity among the trials limit definitive conclusions on the actual infection risk. SUMMARY Our findings suggest some increased risk in infectious complications after the administration of i.v. iron for cancer associated anaemia. However, i.v. iron therapy appears generally safe and effective in cancer-associated anaemia.
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Affiliation(s)
| | - Maurine Salmon
- Data Centre, Institut Jules Bordet and Université Libre de Bruxelles (ULB)
| | - Isabelle Libert
- Medical Oncology, Supportive Care Unit, Institut Jules Bordet, Brussels, Belgium
| | - Jean Klášterský
- Medical Oncology, Supportive Care Unit, Institut Jules Bordet, Brussels, Belgium
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2
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Kyung Kim J, Jo EK. Host and microbial regulation of mitochondrial reactive oxygen species during mycobacterial infections. Mitochondrion 2024; 75:101852. [PMID: 38360196 DOI: 10.1016/j.mito.2024.101852] [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: 10/16/2023] [Revised: 01/15/2024] [Accepted: 02/12/2024] [Indexed: 02/17/2024]
Abstract
Mycobacteria, including Mycobacterium tuberculosis (Mtb) and non-tuberculous mycobacteria (NTM), pose challenges in treatment due to their increased resistance to antibiotics. Following infection, mycobacteria and their components trigger robust innate and inflammatory immune responses intricately associated with the modulation of mitochondrial functions, including oxidative phosphorylation (OXPHOS) and metabolism. Certainly, mitochondrial reactive oxygen species (mtROS) are an inevitable by-product of OXPHOS and function as a bactericidal weapon; however, an excessive accumulation of mtROS are linked to pathological inflammation and necroptotic cell death during mycobacterial infection. Despite previous studies outlining various host pathways involved in regulating mtROS levels during antimicrobial responses in mycobacterial infection, our understanding of the precise mechanisms orchestrating the fine regulation of this response remains limited. Emerging evidence suggests that mycobacterial proteins play a role in targeting the mitochondria of the host, indicating the potential influence of microbial factors on mitochondrial functions within host cells. In this review, we provide an overview of how both host and Mtb factors influence mtROS generation during infection. A comprehensive study of host and microbial factors that target mtROS will shed light on innovative approaches for effectively managing drug-resistant mycobacterial infections.
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Affiliation(s)
- Jin Kyung Kim
- Department of Microbiology, Keimyung University School of Medicine, Daegu, Republic of Korea
| | - Eun-Kyeong Jo
- Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, Republic of Korea; Department of Medical Science, Chungnam National University School of Medicine, Daejeon, Republic of Korea; Department of Microbiology, Chungnam National University School of Medicine, Daejeon, Republic of Korea.
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3
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Chan ED, King PT, Bai X, Schoffstall AM, Sandhaus RA, Buckle AM. The Inhibition of Serine Proteases by Serpins Is Augmented by Negatively Charged Heparin: A Concise Review of Some Clinically Relevant Interactions. Int J Mol Sci 2024; 25:1804. [PMID: 38339082 PMCID: PMC10855260 DOI: 10.3390/ijms25031804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/28/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024] Open
Abstract
Serine proteases are members of a large family of hydrolytic enzymes in which a particular serine residue in the active site performs an essential role as a nucleophile, which is required for their proteolytic cleavage function. The array of functions performed by serine proteases is vast and includes, among others, the following: (i) the ability to fight infections; (ii) the activation of blood coagulation or blood clot lysis systems; (iii) the activation of digestive enzymes; and (iv) reproduction. Serine protease activity is highly regulated by multiple families of protease inhibitors, known collectively as the SERine Protease INhibitor (SERPIN). The serpins use a conformational change mechanism to inhibit proteases in an irreversible way. The unusual conformational change required for serpin function provides an elegant opportunity for allosteric regulation by the binding of cofactors, of which the most well-studied is heparin. The goal of this review is to discuss some of the clinically relevant serine protease-serpin interactions that may be enhanced by heparin or other negatively charged polysaccharides. The paired serine protease-serpin in the framework of heparin that we review includes the following: thrombin-antithrombin III, plasmin-anti-plasmin, C1 esterase/kallikrein-C1 esterase inhibitor, and furin/TMPRSS2 (serine protease Transmembrane Protease 2)-alpha-1-antitrypsin, with the latter in the context of COVID-19 and prostate cancer.
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Affiliation(s)
- Edward D. Chan
- Department of Medicine, Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, CO 80045, USA
- Department of Academic Affairs, National Jewish Health, Denver, CO 80206, USA
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Paul T. King
- Medicine Monash Health, Monash University, Clayton, VIC 3800, Australia
| | - Xiyuan Bai
- Department of Medicine, Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, CO 80045, USA
- Department of Academic Affairs, National Jewish Health, Denver, CO 80206, USA
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Allen M. Schoffstall
- Department of Chemistry and Biochemistry, University of Colorado, Colorado Springs, CO 80918, USA
| | | | - Ashley M. Buckle
- Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia;
- Replay, San Diego, CA 92121, USA
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4
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Herczeg M, Demeter F, Nagy T, Rusznyák Á, Hodek J, Sipos É, Lekli I, Fenyvesi F, Weber J, Kéki S, Borbás A. Block Synthesis and Step-Growth Polymerization of C-6-Sulfonatomethyl-Containing Sulfated Malto-Oligosaccharides and Their Biological Profiling. Int J Mol Sci 2024; 25:677. [PMID: 38203849 PMCID: PMC10779578 DOI: 10.3390/ijms25010677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/30/2023] [Accepted: 12/31/2023] [Indexed: 01/12/2024] Open
Abstract
Highly sulfated malto-oligomers, similar to heparin and heparan-sulfate, have good antiviral, antimetastatic, anti-inflammatory and cell growth inhibitory effects. Due to their broad biological activities and simple structure, sulfated malto-oligomer derivatives have a great therapeutic potential, therefore, the development of efficient synthesis methods for their production is of utmost importance. In this work, preparation of α-(1→4)-linked oligoglucosides containing a sulfonatomethyl moiety at position C-6 of each glucose unit was studied by different approaches. Malto-oligomeric sulfonic acid derivatives up to dodecasaccharides were prepared by polymerization using different protecting groups, and the composition of the product mixtures was analyzed by MALDI-MS methods and size-exclusion chromatography. Synthesis of lower oligomers was also accomplished by stepwise and block synthetic methods, and then the oligosaccharide products were persulfated. The antiviral, anti-inflammatory and cell growth inhibitory activity of the fully sulfated malto-oligosaccharide sulfonic acids were determined by in vitro tests. Four tested di- and trisaccharide sulfonic acids effectively inhibited the activation of the TNF-α-mediated inflammatory pathway without showing cytotoxicity.
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Affiliation(s)
- Mihály Herczeg
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Fruzsina Demeter
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Tibor Nagy
- Department of Applied Chemistry, Faculty of Science and Technology, Institute of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (T.N.); (S.K.)
| | - Ágnes Rusznyák
- Department of Molecular and Nanopharmaceutics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (Á.R.); (F.F.)
- Institute of Healthcare Industry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Jan Hodek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague, Czech Republic; (J.H.); (J.W.)
| | - Éva Sipos
- Department of Pharmacodynamics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (É.S.); (I.L.)
| | - István Lekli
- Department of Pharmacodynamics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (É.S.); (I.L.)
| | - Ferenc Fenyvesi
- Department of Molecular and Nanopharmaceutics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (Á.R.); (F.F.)
| | - Jan Weber
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague, Czech Republic; (J.H.); (J.W.)
| | - Sándor Kéki
- Department of Applied Chemistry, Faculty of Science and Technology, Institute of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (T.N.); (S.K.)
| | - Anikó Borbás
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
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5
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Song J, Sun J, Wang Y, Ding Y, Zhang S, Ma X, Chang F, Fan B, Liu H, Bao C, Meng W. CeRNA network identified hsa-miR-17-5p, hsa-miR-106a-5p and hsa-miR-2355-5p as potential diagnostic biomarkers for tuberculosis. Medicine (Baltimore) 2023; 102:e33117. [PMID: 36930090 PMCID: PMC10019109 DOI: 10.1097/md.0000000000033117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 02/08/2023] [Indexed: 03/18/2023] Open
Abstract
This study aims to analyze the regulatory non-coding RNAs in the pathological process of tuberculosis (TB), and identify novel diagnostic biomarkers. A longitudinal study was conducted in 5 newly diagnosed pulmonary tuberculosis patients, peripheral blood samples were collected before and after anti-TB treatment for 6 months, separately. After whole transcriptome sequencing, the differentially expressed RNAs (DE RNAs) were filtrated with |log2 (fold change) | > log2(1.5) and P value < .05 as screening criteria. Then functional annotation was actualized by gene ontology enrichment analysis, and enrichment pathway analysis was conducted by Kyoto Encyclopedia of Genes and Genomes database. And finally, the competitive endogenous RNA (ceRNA) regulatory network was established according to the interaction of ceRNA pairs and miRNA-mRNA pairs. Five young women were recruited and completed this study. Based on the differential expression analysis, a total of 1469 mRNAs, 996 long non-coding RNAs, 468 circular RNAs, and 86 miRNAs were filtrated as DE RNAs. Functional annotation demonstrated that those DE-mRNAs were strongly involved in the cellular process (n = 624), metabolic process (n = 513), single-organism process (n = 505), cell (n = 651), cell part (n = 650), organelle (n = 569), and binding (n = 629). Enrichment pathway analysis revealed that the differentially expressed genes were mainly enriched in HTLV-l infection, T cell receptor signaling pathway, glycosaminoglycan biosynthesis-heparan sulfate/heparin, and Hippo signaling pathway. CeRNA networks revealed that hsa-miR-17-5p, hsa-miR-106a-5p and hsa-miR-2355-5p might be regarded as potential diagnostic biomarkers for TB. Immunomodulation-related genes are differentially expressed in TB patients, and hsa-miR-106a-5p, hsa-miR-17-5p, hsa-miR-2355-5p might serve as potential diagnostic biomarkers.
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Affiliation(s)
- Jie Song
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Jiaguan Sun
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Yuqing Wang
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Yuehe Ding
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Shengrong Zhang
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Xiuzhen Ma
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Fengxia Chang
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Bingdong Fan
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Hongjuan Liu
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Chenglan Bao
- The 4th People’s Hospital of Qinghai Province, Xining, China
| | - Weimin Meng
- The 4th People’s Hospital of Qinghai Province, Xining, China
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6
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Gehrer CM, Mitterstiller AM, Grubwieser P, Meyron-Holtz EG, Weiss G, Nairz M. Advances in Ferritin Physiology and Possible Implications in Bacterial Infection. Int J Mol Sci 2023; 24:4659. [PMID: 36902088 PMCID: PMC10003477 DOI: 10.3390/ijms24054659] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/17/2023] [Accepted: 02/25/2023] [Indexed: 03/04/2023] Open
Abstract
Due to its advantageous redox properties, iron plays an important role in the metabolism of nearly all life. However, these properties are not only a boon but also the bane of such life forms. Since labile iron results in the generation of reactive oxygen species by Fenton chemistry, iron is stored in a relatively safe form inside of ferritin. Despite the fact that the iron storage protein ferritin has been extensively researched, many of its physiological functions are hitherto unresolved. However, research regarding ferritin's functions is gaining momentum. For example, recent major discoveries on its secretion and distribution mechanisms have been made as well as the paradigm-changing finding of intracellular compartmentalization of ferritin via interaction with nuclear receptor coactivator 4 (NCOA4). In this review, we discuss established knowledge as well as these new findings and the implications they may have for host-pathogen interaction during bacterial infection.
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Affiliation(s)
- Clemens M. Gehrer
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Anna-Maria Mitterstiller
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Philipp Grubwieser
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Esther G. Meyron-Holtz
- Laboratory of Molecular Nutrition, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Günter Weiss
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, 6020 Innsbruck, Austria
- Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Manfred Nairz
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, 6020 Innsbruck, Austria
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7
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Stolarek M, Pycior A, Bonarek P, Opydo M, Kolaczkowska E, Kamiński K, Mogielnicki A, Szczubiałka K. Biological Properties of Heparins Modified with an Arylazopyrazole-Based Photoswitch. J Med Chem 2023; 66:1778-1789. [PMID: 36657057 PMCID: PMC9923745 DOI: 10.1021/acs.jmedchem.2c01616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Unfractionated heparin (UFH) and enoxaparin (Enox) were substituted with a photoswitch (PS) showing quantitative trans-cis and cis-trans photoisomerizations. Long half-life of the cis photoisomer enabled comparison of the properties of heparins substituted with both PS photoisomers. Hydrodynamic diameter, Dh, of UFH-PS decreased upon trans-cis photoisomerization, the change being more pronounced for UFH-PS with a higher degree of substitution (DS), while Dh of Enox-PS did not significantly change. The anticoagulative properties of substituted heparins were significantly attenuated compared to non-substituted compounds. The interaction of UFH-PS with HSA, lysozyme, and protamine was studied with ITC. Under serum-free conditions, UFH-PS-trans with a high DS stimulated proliferation of murine fibroblasts, while UFH-PS-cis decreased the viability of these cells. Under serum conditions, both UFH-PS-cis and UFH-PS-trans decreased cell viability, the reduction for UFH-PS-cis being higher than that for UFH-PS-trans. Neither Enox-PS-trans nor Enox-PS-cis influenced the viability at concentrations prolonging aPTT, while at higher concentrations their cytotoxicity did not differ.
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Affiliation(s)
- Marta Stolarek
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Aleksandra Pycior
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Piotr Bonarek
- Faculty
of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland
| | - Małgorzata Opydo
- Laboratory
of Experimental Hematology, Institute of Zoology and Biomedical Research,
Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387 Krakow, Poland
| | - Elzbieta Kolaczkowska
- Laboratory
of Experimental Hematology, Institute of Zoology and Biomedical Research,
Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387 Krakow, Poland
| | - Kamil Kamiński
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Andrzej Mogielnicki
- Department
of Pharmacodynamics, Medical University
of Bialystok, Mickiewicza 2c, 15-089 Bialystok, Poland
| | - Krzysztof Szczubiałka
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland,
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8
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Lawanprasert A, Pimcharoen S, Sumner SE, Watson CT, Manning KB, Kirimanjeswara GS, Medina SH. Heparin-Peptide Nanogranules for Thrombosis-Actuated Anticoagulation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203751. [PMID: 36192159 PMCID: PMC9671832 DOI: 10.1002/smll.202203751] [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: 06/16/2022] [Revised: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Despite nearly a century of clinical use as a blood thinner, heparin's rapid serum clearance and potential to induce severe bleeding events continue to urge the development of more effective controlled delivery strategies. Subcutaneous depots that steadily release the anticoagulant into circulation represent a promising approach to reducing overdose frequency, sustaining therapeutic concentrations of heparin in plasma, and prolonging anticoagulant activity in a safe and effective manner. Subcutaneously deliverable heparin-peptide nanogranules that allow for long-lasting heparin bioavailability in the circulatory system, while enabling on-demand activation of heparin's anticoagulant effects in the thrombus microenvironment, are reported. Biophysical studies demonstrate this responsive behavior is due to the sequestration of heparin within self-assembling peptide nanofibrils and its mechanically actuated decoupling to elicit antithrombotic effects at the clotting site. In vivo studies show these unique properties converge to allow subcutaneous nanogranule depots to extend heparin serum concentrations for an order of magnitude longer than standard dosing regimens while enabling prolonged and controlled anticoagulant activity. This biohybrid delivery system demonstrates a potentially scalable platform for the development of safer, easier to administer, and more effective antithrombotic nanotechnologies.
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Affiliation(s)
- Atip Lawanprasert
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, 16802-4400, USA
| | - Sopida Pimcharoen
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, 16802-4400, USA
| | - Sarah E Sumner
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, 16802-4400, USA
| | - Connor T Watson
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, 16802-4400, USA
| | - Keefe B Manning
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, 16802-4400, USA
| | - Girish S Kirimanjeswara
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, 16802-4400, USA
- Center for Infectious Disease Dynamics, Pennsylvania State University, University Park, PA, 16802-4400, USA
- Center for Molecular Immunology and Infectious Disease, Pennsylvania State University, University Park, PA, 16802-4400, USA
| | - Scott H Medina
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, 16802-4400, USA
- Huck Institutes of the Life Sciences, Penn State University, University Park, PA, 16802-4400, USA
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9
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Parbhoo T, Mouton JM, Sampson SL. Phenotypic adaptation of Mycobacterium tuberculosis to host-associated stressors that induce persister formation. Front Cell Infect Microbiol 2022; 12:956607. [PMID: 36237425 PMCID: PMC9551238 DOI: 10.3389/fcimb.2022.956607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/24/2022] [Indexed: 11/29/2022] Open
Abstract
Mycobacterium tuberculosis exhibits a remarkable ability to interfere with the host antimicrobial response. The pathogen exploits elaborate strategies to cope with diverse host-induced stressors by modulating its metabolism and physiological state to prolong survival and promote persistence in host tissues. Elucidating the adaptive strategies that M. tuberculosis employs during infection to enhance persistence is crucial to understanding how varying physiological states may differentially drive disease progression for effective management of these populations. To improve our understanding of the phenotypic adaptation of M. tuberculosis, we review the adaptive strategies employed by M. tuberculosis to sense and coordinate a physiological response following exposure to various host-associated stressors. We further highlight the use of animal models that can be exploited to replicate and investigate different aspects of the human response to infection, to elucidate the impact of the host environment and bacterial adaptive strategies contributing to the recalcitrance of infection.
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10
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Heparin: An old drug for new clinical applications. Carbohydr Polym 2022; 295:119818. [DOI: 10.1016/j.carbpol.2022.119818] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 12/23/2022]
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11
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Mesenchymal Stromal Cells: an Antimicrobial and Host-Directed Therapy for Complex Infectious Diseases. Clin Microbiol Rev 2021; 34:e0006421. [PMID: 34612662 DOI: 10.1128/cmr.00064-21] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
There is an urgent need for new antimicrobial strategies for treating complex infections and emerging pathogens. Human mesenchymal stromal cells (MSCs) are adult multipotent cells with antimicrobial properties, mediated through direct bactericidal activity and modulation of host innate and adaptive immune cells. More than 30 in vivo studies have reported on the use of human MSCs for the treatment of infectious diseases, with many more studies of animal MSCs in same-species models of infection. MSCs demonstrate potent antimicrobial effects against the major classes of human pathogens (bacteria, viruses, fungi, and parasites) across a wide range of infection models. Mechanistic studies have yielded important insight into their immunomodulatory and bactericidal activity, which can be enhanced through various forms of preconditioning. MSCs are being investigated in over 80 clinical trials for difficult-to-treat infectious diseases, including sepsis and pulmonary, intra-abdominal, cutaneous, and viral infections. Completed trials consistently report MSCs to be safe and well tolerated, with signals of efficacy against some infectious diseases. Although significant obstacles must be overcome to produce a standardized, affordable, clinical-grade cell therapy, these studies suggest that MSCs may have particular potential as an adjunct therapy in complex or resistant infections.
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12
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Low-Dose Exposure to Ganglioside-Mimicking Bacteria Tolerizes Human Macrophages to Guillain-Barré Syndrome-Associated Antigens. mBio 2021; 13:e0385221. [PMID: 35100875 PMCID: PMC8805021 DOI: 10.1128/mbio.03852-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Early in life, commensal bacteria play a major role in immune development, helping to guide the host response toward harmful stimuli while tolerating harmless antigens to prevent autoimmunity. Guillain-Barré syndrome (GBS) is an autoimmune disease caused by errant immune attack of antibody-bound ganglioside receptors on host nerve cells, resulting in paralysis. Lipooligosaccharides enveloping the prevalent enteric pathogen, Campylobacter jejuni, frequently mimic human gangliosides and can trigger GBS by stimulating the autoimmune response. In low- to middle-income countries, young children are consistently exposed to C. jejuni, and it is not known if this impacts GBS susceptibility later in life. Using a macrophage model, we examined the effect of training these cells with low doses of ganglioside-mimicking bacteria prior to challenge with GBS-associated antigens. This training caused decreased production of proinflammatory cytokines, suggesting tolerance induction. We then screened Campylobacter isolates from 154 infant fecal samples for GM1 ganglioside mimicry, finding that 23.4% of strains from both symptomatic and asymptomatic infants displayed GM1-like structures. Training macrophages with one of these asymptomatic carrier isolates also induced tolerance against GBS-associated antigens, supporting that children can be exposed to the tolerizing antigen early in life. RNA interference of Toll-like receptor 2 (TLR2) and TLR4 suggests that these receptors are not involved in tolerance associated with decreases in tumor necrosis factor (TNF), interleukin-6 (IL-6), or IL-1β levels. The results of this study suggest that exposure to ganglioside-mimicking bacteria early in life occurs naturally and impacts host susceptibility to GBS development. IMPORTANCE In this study, we demonstrated that it is possible to tolerize immune cells to potentially dampen the autoreactive proinflammatory immune response against Guillain-Barré syndrome (GBS)-associated antigens. The innate immune response functions to arm the host against bacterial attack, but it can be tricked into recognizing the host's own cells when infectious bacteria display sugar structures that mimic human glycans. It is this errant response that leads to the autoimmunity and paralysis associated with GBS. By presenting immune cells with small amounts of the bacterial glycan mimic, we were able to suppress the proinflammatory immune response upon subsequent high exposure to glycan-mimicking bacteria. This suggests that individuals who have already been exposed to the glycan mimics in small amounts are less sensitive to autoimmune reactions against these glycans, and this could be a factor in determining susceptibility to GBS.
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13
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Pisu D, Huang L, Grenier JK, Russell DG. Dual RNA-Seq of Mtb-Infected Macrophages In Vivo Reveals Ontologically Distinct Host-Pathogen Interactions. Cell Rep 2021; 30:335-350.e4. [PMID: 31940480 PMCID: PMC7032562 DOI: 10.1016/j.celrep.2019.12.033] [Citation(s) in RCA: 140] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 10/31/2019] [Accepted: 12/10/2019] [Indexed: 12/13/2022] Open
Abstract
Dissecting the in vivo host-pathogen interplay is crucial to understanding the molecular mechanisms governing control or progression of intracellular infections. In this work, we explore the in vivo molecular dynamics of Mtb infection by performing dual RNA-seq on Mycobacterium tuberculosis-infected, ontogenetically distinct macrophage lineages isolated directly from murine lungs. We first define an in vivo signature of 180 genes specifically upregulated by Mtb in mouse lung macrophages, then we uncover a divergent transcriptional response of the bacteria between alveolar macrophages that appear to sustain Mtb growth through increased access to iron and fatty acids and interstitial macrophages that restrict Mtb growth through iron sequestration and higher levels of nitric oxide. We use an enrichment protocol for bacterial transcripts, which enables us to probe Mtb physiology at the host cell level in an in vivo environment, with broader application in understanding the infection dynamics of intracellular pathogens in general. In this study Pisu et al. performed dual RNA-seq on Mycobacterium tuberculosis-infected, ontogenetically distinct macrophage lineages isolated directly from infected murine lungs. The transcriptional response of host and bacteria diverged between alveolar macrophages that sustain Mtb growth and interstitial macrophages that restrict Mtb growth.
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Affiliation(s)
- Davide Pisu
- Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Lu Huang
- Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Jennifer K Grenier
- RNA Sequencing Core, Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - David G Russell
- Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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14
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Interferon-gamma promotes iron export in human macrophages to limit intracellular bacterial replication. PLoS One 2020; 15:e0240949. [PMID: 33290416 PMCID: PMC7723272 DOI: 10.1371/journal.pone.0240949] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 10/27/2020] [Indexed: 01/20/2023] Open
Abstract
Salmonellosis and listeriosis together accounted for more than one third of foodborne illnesses in the United States and almost half the hospitalizations for gastrointestinal diseases in 2018 while tuberculosis afflicted over 10 million people worldwide causing almost 2 million deaths. Regardless of the intrinsic virulence differences among Listeria monocytogenes, Salmonella enterica and Mycobacterium tuberculosis, these intracellular pathogens share the ability to survive and persist inside the macrophage and other cells and thrive in iron rich environments. Interferon-gamma (IFN-γ) is a central cytokine in host defense against intracellular pathogens and has been shown to promote iron export in macrophages. We hypothesize that IFN-γ decreases iron availability to intracellular pathogens consequently limiting replication in these cells. In this study, we show that IFN-γ regulates the expression of iron-related proteins hepcidin, ferroportin, and ferritin to induce iron export from macrophages. Listeria monocytogenes, S. enterica, and M. tuberculosis infections significantly induce iron sequestration in human macrophages. In contrast, IFN-γ significantly reduces hepcidin secretion in S. enterica and M. tuberculosis infected macrophages. Similarly, IFN-γ-activated macrophages express higher ferroportin levels than untreated controls even after infection with L. monocytogenes bacilli; bacterial infection greatly down-regulates ferroportin expression. Collectively, IFN-γ significantly inhibits pathogen-associated intracellular iron sequestration in macrophages and consequently retards the growth of intracellular bacterial pathogens by decreasing iron availability.
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15
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Kang J, Wei ZF, Li MX, Wang JH. Modulatory effect of Tim-3/Galectin-9 axis on T-cell-mediated immunity in pulmonary tuberculosis. J Biosci 2020. [DOI: 10.1007/s12038-020-0023-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Quiros Roldan E, Biasiotto G, Magro P, Zanella I. The possible mechanisms of action of 4-aminoquinolines (chloroquine/hydroxychloroquine) against Sars-Cov-2 infection (COVID-19): A role for iron homeostasis? Pharmacol Res 2020; 158:104904. [PMID: 32430286 PMCID: PMC7217799 DOI: 10.1016/j.phrs.2020.104904] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/04/2020] [Accepted: 05/06/2020] [Indexed: 02/06/2023]
Abstract
The anti-malarial drugs chloroquine (CQ) and primarily the less toxic hydroxychloroquine (HCQ) are currently used to treat autoimmune diseases for their immunomodulatory and anti-thrombotic properties. They have also been proposed for the treatment of several viral infections, due to their anti-viral effects in cell cultures and animal models, and, currently, for the treatment of coronavirus disease 2019 (COVID-19), the pandemic severe acute respiratory syndrome caused by coronavirus 2 (Sars-Cov-2) infection that is spreading all over the world. Although in some recent studies a clinical improvement in COVID-19 patients has been observed, the clinical efficacy of CQ and HCQ in COVID-19 has yet to be proven with randomized controlled studies, many of which are currently ongoing, also considering pharmacokinetics, optimal dosing regimen, therapeutic level and duration of treatment and taking into account patients with different severity degrees of disease. Here we review what is currently known on the mechanisms of action of CQ and HCQ as anti-viral, anti-inflammatory and anti-thrombotic drugs and discuss the up-to-date experimental evidence on the potential mechanisms of action of CQ/HCQ in Sars-Cov2 infection and the current clinical knowledge on their efficacy in the treatment of COVID-19 patients. Given the role of iron in several human viral infections, we also propose a different insight into a number of CQ and HCQ pharmacological effects, suggesting a potential involvement of iron homeostasis in Sars-Cov-2 infection and COVID-19 clinical course.
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Affiliation(s)
- Eugenia Quiros Roldan
- University Department of Infectious and Tropical Diseases, University of Brescia and ASST Spedali Civili di Brescia, Brescia, Italy
| | - Giorgio Biasiotto
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy; Clinical Chemistry Laboratory, Cytogenetics and Molecular Genetics Section, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Paola Magro
- University Department of Infectious and Tropical Diseases, University of Brescia and ASST Spedali Civili di Brescia, Brescia, Italy
| | - Isabella Zanella
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy; Clinical Chemistry Laboratory, Cytogenetics and Molecular Genetics Section, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy.
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17
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Fenaroli F, Robertson JD, Scarpa E, Gouveia VM, Di Guglielmo C, De Pace C, Elks PM, Poma A, Evangelopoulos D, Canseco JO, Prajsnar TK, Marriott HM, Dockrell DH, Foster SJ, McHugh TD, Renshaw SA, Martí JS, Battaglia G, Rizzello L. Polymersomes Eradicating Intracellular Bacteria. ACS NANO 2020; 14:8287-8298. [PMID: 32515944 DOI: 10.1021/acsnano.0c01870] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Mononuclear phagocytes such as monocytes, tissue-specific macrophages, and dendritic cells are primary actors in both innate and adaptive immunity. These professional phagocytes can be parasitized by intracellular bacteria, turning them from housekeepers to hiding places and favoring chronic and/or disseminated infection. One of the most infamous is the bacteria that cause tuberculosis (TB), which is the most pandemic and one of the deadliest diseases, with one-third of the world's population infected and an average of 1.8 million deaths/year worldwide. Here we demonstrate the effective targeting and intracellular delivery of antibiotics to infected macrophages both in vitro and in vivo, using pH-sensitive nanoscopic polymersomes made of PMPC-PDPA block copolymer. Polymersomes showed the ability to significantly enhance the efficacy of the antibiotics killing Mycobacterium bovis, Mycobacterium tuberculosis, and another established intracellular pathogen, Staphylococcus aureus. Moreover, they demonstrated to easily access TB-like granuloma tissues-one of the harshest environments to penetrate-in zebrafish models. We thus successfully exploited this targeting for the effective eradication of several intracellular bacteria, including M. tuberculosis, the etiological agent of human TB.
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Affiliation(s)
| | - James D Robertson
- Department of Biomedical Science, University of Sheffield, S10 2TN Sheffield, U.K
- The Bateson Centre, University of Sheffield, Firth Court, S10 2TN Sheffield, U.K
| | - Edoardo Scarpa
- Department of Chemistry, University College London, WC1H 0AJ London, U.K
| | - Virginia M Gouveia
- Department of Chemistry, University College London, WC1H 0AJ London, U.K
| | - Claudia Di Guglielmo
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Cesare De Pace
- Department of Chemistry, University College London, WC1H 0AJ London, U.K
- The EPSRC/Jeol Centre for Liquid Phase Electron Microscopy, University College London, WC1H 0AJ London, U.K
| | - Philip M Elks
- Department of Biomedical Science, University of Sheffield, S10 2TN Sheffield, U.K
- Department of Infection, Immunity, and Cardiovascular Disease, University of Sheffield Medical School, S10 2JF Sheffield, U.K
| | - Alessandro Poma
- Department of Chemistry, University College London, WC1H 0AJ London, U.K
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, WC1X 8LD London, U.K
| | - Dimitrios Evangelopoulos
- Department of Clinical Microbiology, University College London, Royal Free Hospital, NW3 2PF London, U.K
| | - Julio Ortiz Canseco
- Department of Clinical Microbiology, University College London, Royal Free Hospital, NW3 2PF London, U.K
| | - Tomasz K Prajsnar
- The Florey Institute, University of Sheffield, S10 2TN Sheffield, U.K
- Department of Molecular Biology and Biotechnology, University of Sheffield, S10 2TN Sheffield, U.K
| | - Helen M Marriott
- Department of Infection, Immunity, and Cardiovascular Disease, University of Sheffield Medical School, S10 2JF Sheffield, U.K
- The Florey Institute, University of Sheffield, S10 2TN Sheffield, U.K
| | - David H Dockrell
- Department of Infection, Immunity, and Cardiovascular Disease, University of Sheffield Medical School, S10 2JF Sheffield, U.K
| | - Simon J Foster
- The Florey Institute, University of Sheffield, S10 2TN Sheffield, U.K
- Department of Molecular Biology and Biotechnology, University of Sheffield, S10 2TN Sheffield, U.K
| | - Timothy D McHugh
- Department of Clinical Microbiology, University College London, Royal Free Hospital, NW3 2PF London, U.K
| | - Stephen A Renshaw
- The Bateson Centre, University of Sheffield, Firth Court, S10 2TN Sheffield, U.K
- Department of Infection, Immunity, and Cardiovascular Disease, University of Sheffield Medical School, S10 2JF Sheffield, U.K
- The Florey Institute, University of Sheffield, S10 2TN Sheffield, U.K
| | - Josep Samitier Martí
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
- Department of Electronics and Biomedical Engineering, University of Barcelona, 08028 Barcelona, Spain
- Networking Biomedical Research Center for Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Giuseppe Battaglia
- Department of Chemistry, University College London, WC1H 0AJ London, U.K
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
- The EPSRC/Jeol Centre for Liquid Phase Electron Microscopy, University College London, WC1H 0AJ London, U.K
- Institute for Physics of Living System, University College London, WC1E 6BT London, U.K
- Catalan Institution for Research and Advanced Studies (ICREA), 08010 Barcelona, Spain
| | - Loris Rizzello
- Department of Chemistry, University College London, WC1H 0AJ London, U.K
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milano, Italy
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18
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Abreu R, Giri P, Quinn F. Host-Pathogen Interaction as a Novel Target for Host-Directed Therapies in Tuberculosis. Front Immunol 2020; 11:1553. [PMID: 32849525 PMCID: PMC7396704 DOI: 10.3389/fimmu.2020.01553] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 06/12/2020] [Indexed: 12/13/2022] Open
Abstract
Tuberculosis (TB) has been a transmittable human disease for many thousands of years, and M. tuberculosis is again the number one cause of death worldwide due to a single infectious agent. The intense 6- to 10-month process of multi-drug treatment, combined with the adverse side effects that can run the spectrum from gastrointestinal disturbances to liver toxicity or peripheral neuropathy are major obstacles to patient compliance and therapy completion. The consequent increase in multidrug resistant TB (MDR-TB) and extensively drug resistant TB (XDR-TB) cases requires that we increase our arsenal of effective drugs, particularly novel therapeutic approaches. Over the millennia, host and pathogen have evolved mechanisms and relationships that greatly influence the outcome of infection. Understanding these evolutionary interactions and their impact on bacterial clearance or host pathology will lead the way toward rational development of new therapeutics that favor enhancing a host protective response. These host-directed therapies have recently demonstrated promising results against M. tuberculosis, adding to the effectiveness of currently available anti-mycobacterial drugs that directly kill the organism or slow mycobacterial replication. Here we review the host-pathogen interactions during M. tuberculosis infection, describe how M. tuberculosis bacilli modulate and evade the host immune system, and discuss the currently available host-directed therapies that target these bacterial factors. Rather than provide an exhaustive description of M. tuberculosis virulence factors, which falls outside the scope of this review, we will instead focus on the host-pathogen interactions that lead to increased bacterial growth or host immune evasion, and that can be modulated by existing host-directed therapies.
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Affiliation(s)
| | | | - Fred Quinn
- Department of Infectious Diseases, University of Georgia, Athens, GA, United States
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19
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Seffer MT, Cottam D, Forni LG, Kielstein JT. Heparin 2.0: A New Approach to the Infection Crisis. Blood Purif 2020; 50:28-34. [PMID: 32615569 PMCID: PMC7445380 DOI: 10.1159/000508647] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/11/2020] [Indexed: 11/22/2022]
Abstract
In April 2020, the US Food and Drug Administration granted emergency use authorization for certain medical devices to be used in patients with coronavirus disease 2019 (COVID-19). This included extracorporeal blood purification devices. This narrative review will give a brief overview regarding some of the extracorporeal devices that could be used to treat COVID-19 patients, including the Seraph® 100 Microbind® Affinity Blood Filter, produced by ExThera Medical (Martinez, CA, USA), first licensed in the European Economic Area in 2019. The Seraph® 100 contains ultrahigh molecular weight polyethylene beads with end point-attached heparin and is approved for the reduction of pathogens from the bloodstream either as a single agent or as an adjunct to conventional anti-infective agents. Bacteria, viruses, fungi, and toxins have been shown to bind to the immobilized heparin in a similar way to the interaction with heparan sulfate on the cell surface. This binding is nonreversible and as such, the pathogens are removed from the bloodstream. In this review, we describe the pathophysiological basis and rationale for using heparin for pathogen removal from the blood as well as exploring the technology behind the adaptation of heparin to deprive it of its systemic anticoagulant activity. In addition, we summarize the in vitro data as well as the available preclinical testing and published clinical reports. Finally, we discuss the enormous potential of this technology in an era of increasing antibiotic resistance and high mortality associated with sepsis and consider the application of this as a possible treatment option for COVID-19.
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Affiliation(s)
- Malin-Theres Seffer
- Medical Clinic V, Nephrology
- Rheumatology
- Blood Purification, Academic Teaching Hospital Braunschweig, Braunschweig, Germany.,Microbial Proteomics, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Daniel Cottam
- Intensive Care Unit, Royal Surrey Hospital NHS Foundation Trust, Guildford, United Kingdom
| | - Lui G Forni
- Intensive Care Unit, Royal Surrey Hospital NHS Foundation Trust, Guildford, United Kingdom.,Department of Clinical & Experimental Medicine, School of Biosciences & Medicine, University of Surrey, Guildford, United Kingdom
| | - Jan T Kielstein
- Medical Clinic V, Nephrology
- Rheumatology
- Blood Purification, Academic Teaching Hospital Braunschweig, Braunschweig, Germany,
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20
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Serum proteomics of active tuberculosis patients and contacts reveals unique processes activated during Mycobacterium tuberculosis infection. Sci Rep 2020; 10:3844. [PMID: 32123229 PMCID: PMC7052228 DOI: 10.1038/s41598-020-60753-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 02/17/2020] [Indexed: 01/24/2023] Open
Abstract
Tuberculosis (TB) is the most lethal infection among infectious diseases. The specific aim of this study was to establish panels of serum protein biomarkers representative of active TB patients and their household contacts who were either infected (LTBI) or uninfected (EMI-TB Discovery Cohort, Pontevedra Region, Spain). A TMT (Tamdem mass tags) 10plex-based quantitative proteomics study was performed in quintuplicate containing a total of 15 individual serum samples per group. Peptides were analyzed in an LC-Orbitrap Elite platform, and raw data were processed using Proteome Discoverer 2.1. A total of 418 proteins were quantified. The specific protein signature of active TB patients was characterized by an accumulation of proteins related to complement activation, inflammation and modulation of immune response and also by a decrease of a small subset of proteins, including apolipoprotein A and serotransferrin, indicating the importance of lipid transport and iron assimilation in the progression of the disease. This signature was verified by the targeted measurement of selected candidates in a second cohort (EMI-TB Verification Cohort, Maputo Region, Mozambique) by ELISA and nephelometry techniques. These findings will aid our understanding of the complex metabolic processes associated with TB progression from LTBI to active disease.
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21
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Kang J, Wei ZF, Li MX, Wang JH. Modulatory effect of Tim-3/Galectin-9 axis on T-cell-mediated immunity in pulmonary tuberculosis. J Biosci 2020; 45:60. [PMID: 32345786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Patients affected by pulmonary tuberculosis (PTB) manifest deficiencies in innate cellular immunity. The Tim3/Galectin-9 axis is an important regulator of Th1 cell immunity, leading to Th1 cell apoptosis. Herein, this study aims to clarify the underlying roles of the Tim-3/Galectin-9 axis in T-cell immunity in PTB. Peripheral blood mononuclear cells (PBMCs) were extracted from subjects with and without PTB to examine the expression of CD4, CD8, CD25, and Tim-3 under the stimulation of Mycobacterium tuberculosis (MTB) and purified protein derivative (PPD). In addition, the expression of Tim-3 and Galectin-9 in PBMCs was determined. The Tim-3/Galectin-9 axis in the PBMCs was activated or blocked to detect the secreted levels of IFN-γ, TNF-α, IL-2, and IL-22. MTB stimulation increased the expression of CD4, CD8, CD25, Tim-3, and Galectin-9 in PBMCs. The blockade of Tim-3/Galectin-9 axis resulted in reduced secretion of IFN-γ, TNF-α, IL-2, and IL-22 from T-cells. Moreover, Tim-3+CD4+T, Tim-3+CD8+, and Tim-3+CD25+T cells exhibited a greater ability to inhibit the replication of MTB in macrophages. Taken conjointly, the blockade of Tim-3/ Galectin-9 axis inhibits the secretion of inflammatory cytokines in T-cells to regulate the T-cell immunity in PTB.
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Affiliation(s)
- Jing Kang
- Department of Respiratory, The First Hospital of Jilin University, Changchun 130021, People's Republic of China
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22
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Hepcidin Therapeutics. Pharmaceuticals (Basel) 2018; 11:ph11040127. [PMID: 30469435 PMCID: PMC6316648 DOI: 10.3390/ph11040127] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 11/15/2018] [Accepted: 11/19/2018] [Indexed: 12/12/2022] Open
Abstract
Hepcidin is a key hormonal regulator of systemic iron homeostasis and its expression is induced by iron or inflammatory stimuli. Genetic defects in iron signaling to hepcidin lead to “hepcidinopathies” ranging from hereditary hemochromatosis to iron-refractory iron deficiency anemia, which are disorders caused by hepcidin deficiency or excess, respectively. Moreover, dysregulation of hepcidin is a pathogenic cofactor in iron-loading anemias with ineffective erythropoiesis and in anemia of inflammation. Experiments with preclinical animal models provided evidence that restoration of appropriate hepcidin levels can be used for the treatment of these conditions. This fueled the rapidly growing field of hepcidin therapeutics. Several hepcidin agonists and antagonists, as well as inducers and inhibitors of hepcidin expression have been identified to date. Some of them were further developed and are currently being evaluated in clinical trials. This review summarizes the state of the art.
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23
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Phelan JJ, Basdeo SA, Tazoll SC, McGivern S, Saborido JR, Keane J. Modulating Iron for Metabolic Support of TB Host Defense. Front Immunol 2018; 9:2296. [PMID: 30374347 PMCID: PMC6196273 DOI: 10.3389/fimmu.2018.02296] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/17/2018] [Indexed: 02/05/2023] Open
Abstract
Tuberculosis (TB) is the world's biggest infectious disease killer. The increasing prevalence of multidrug-resistant and extensively drug-resistant TB demonstrates that current treatments are inadequate and there is an urgent need for novel therapies. Research is now focused on the development of host-directed therapies (HDTs) which can be used in combination with existing antimicrobials, with a special focus on promoting host defense. Immunometabolic reprogramming is integral to TB host defense, therefore, understanding and supporting the immunometabolic pathways that are altered after infection will be important for the development of new HDTs. Moreover, TB pathophysiology is interconnected with iron metabolism. Iron is essential for the survival of Mycobacterium tuberculosis (Mtb), the bacteria that causes TB disease. Mtb struggles to replicate and persist in low iron environments. Iron chelation has therefore been suggested as a HDT. In addition to its direct effects on iron availability, iron chelators modulate immunometabolism through the stabilization of HIF1α. This review examines immunometabolism in the context of Mtb and its links to iron metabolism. We suggest that iron chelation, and subsequent stabilization of HIF1α, will have multifaceted effects on immunometabolic function and holds potential to be utilized as a HDT to boost the host immune response to Mtb infection.
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Affiliation(s)
- James J Phelan
- Department of Clinical Medicine, Trinity Centre for Health Sciences, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland
| | - Sharee A Basdeo
- Department of Clinical Medicine, Trinity Centre for Health Sciences, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland
| | - Simone C Tazoll
- Department of Clinical Medicine, Trinity Centre for Health Sciences, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland
| | - Sadhbh McGivern
- Department of Clinical Medicine, Trinity Centre for Health Sciences, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland
| | - Judit R Saborido
- Department of Clinical Medicine, Trinity Centre for Health Sciences, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland
| | - Joseph Keane
- Department of Clinical Medicine, Trinity Centre for Health Sciences, Trinity Translational Medicine Institute, St. James's Hospital, Dublin, Ireland
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