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Biernbaum EN, Dassanayake RP, Nicholson EM, Kudva IT. Comparative evaluation of antimicrobial activity of human granulysin, bovine and porcine NK-lysins against Shiga toxin-producing Escherichia coli O157:H7. PLoS One 2023; 18:e0292234. [PMID: 37768945 PMCID: PMC10538649 DOI: 10.1371/journal.pone.0292234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 09/16/2023] [Indexed: 09/30/2023] Open
Abstract
Shiga toxin-producing Escherichia coli (STEC) O157:H7 (O157) is a foodborne pathogen causing human disease ranging from hemorrhagic colitis and hemolytic uremic syndrome to kidney failure, while remaining harmless to cattle, its primary reservoir. The severity of the human disease associated mainly with Shiga toxin production and a global emergence of antibiotic resistant STEC highlights the need for effective non-antibiotic, pre-harvest strategies to reduce O157 in cattle, the principal source of human infection. Towards this goal three synthetic antimicrobial peptides (AMPs): human granulysin (hGRNL), bovine NK-lysin (bNK2A), and porcine NK-lysin (pNKL), were tested in vitro against O157 isolates. As expected, circular dichroism spectroscopy findings were consistent with a predominantly α-helical conformation for all three AMPs in an environment mimicking bacterial outer surface or liposaccharides. The minimum inhibitory concentrations (MIC) and minimum bactericidal concentrations of hGRNL (200 μM), bNK2A (12.5 μM against strain 86-24 and 25 μM against EDL933), and pNKL (6.25 μM) were determined using the Clinical and Laboratory Standards Institute broth microdilution method in Müeller-Hinton broth (cation-adjusted). The bNK2A and pNKL AMPs did not induce Shiga toxin expression in O157 at MIC, as there was a significant decrease or no change in toxin expression following 4- or 20 h incubation with the AMPs; bNK2A p <0.0001 (4 h) and p = 0.4831 (20 h); pNKL p <0.0001 (4 h) and p = 0.0001 (20 h). Propidium iodide uptake assay revealed faster O157 membrane damage or killing kinetics with bNK2A and pNKL compared to hGRNL. Nonetheless, transmission electron microscopy demonstrated that all three AMPs mediated damage to O157 membranes. In contrast, the three AMPs showed minimal cytotoxicity (<2%) against cattle red blood cells at tested concentrations (0.39-50 μM). Overall, our results demonstrate the potential for bNK2A and pNKL to be further developed into novel non-antibiotic agents to reduce O157 shedding in cattle.
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Affiliation(s)
- Erika N. Biernbaum
- Food Safety and Enteric Pathogens Research Unit, National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture, Ames, Iowa, United States of America
- Oak Ridge Institute for Science and Education (ORISE), ARS Research Participation Program, Oak Ridge, Tennessee, United States of America
| | - Rohana P. Dassanayake
- Ruminant Diseases and Immunology Research Unit, National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture, Ames, Iowa, United States of America
| | - Eric M. Nicholson
- Virus and Prion Research Unit, National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture, Ames, Iowa, United States of America
| | - Indira T. Kudva
- Food Safety and Enteric Pathogens Research Unit, National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture, Ames, Iowa, United States of America
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Mlakar L, Garrett SM, Watanabe T, Sanderson M, Nishimoto T, Heywood J, Helke KL, Pilewski JM, Herzog EL, Feghali-Bostwick C. Ameliorating Fibrosis in Murine and Human Tissues with END55, an Endostatin-Derived Fusion Protein Made in Plants. Biomedicines 2022; 10:2861. [PMID: 36359382 PMCID: PMC9687961 DOI: 10.3390/biomedicines10112861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/12/2022] [Accepted: 11/04/2022] [Indexed: 11/12/2022] Open
Abstract
Organ fibrosis, particularly of the lungs, causes significant morbidity and mortality. Effective treatments are needed to reduce the health burden. A fragment of the carboxyl-terminal end of collagen XVIII/endostatin reduces skin and lung fibrosis. This fragment was modified to facilitate its production in plants, which resulted in the recombinant fusion protein, END55. We found that expression of END55 had significant anti-fibrotic effects on the treatment and prevention of skin and lung fibrosis in a bleomycin mouse model. We validated these effects in a second mouse model of pulmonary fibrosis involving inducible, lung-targeted expression of transforming growth factor β1. END55 also exerted anti-fibrotic effects in human lung and skin tissues maintained in organ culture in which fibrosis was experimentally induced. The anti-fibrotic effect of END55 was mediated by a decrease in the expression of extracellular matrix genes and an increase in the levels of matrix-degrading enzymes. Finally, END55 reduced fibrosis in the lungs of patients with systemic sclerosis (SSc) and idiopathic pulmonary fibrosis (IPF) who underwent lung transplantation due to the severity of their lung disease, displaying efficacy in human tissues directly relevant to human disease. These findings demonstrate that END55 is an effective anti-fibrotic therapy in different organs.
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Affiliation(s)
- Logan Mlakar
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sara M. Garrett
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Tomoya Watanabe
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Matthew Sanderson
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Tetsuya Nishimoto
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jonathan Heywood
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Kristi L. Helke
- Department of Comparative Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Joseph M. Pilewski
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Erica L. Herzog
- Yale ILD Center of Excellence, Department of Medicine, Yale School of Medicine, New Haven, CT 06519, USA
| | - Carol Feghali-Bostwick
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
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Feehan DD, Jamil K, Polyak MJ, Ogbomo H, Hasell M, LI SS, Xiang RF, Parkins M, Trapani JA, Harrison JJ, Mody CH. Natural killer cells kill extracellular Pseudomonas aeruginosa using contact-dependent release of granzymes B and H. PLoS Pathog 2022; 18:e1010325. [PMID: 35202434 PMCID: PMC8903247 DOI: 10.1371/journal.ppat.1010325] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 03/08/2022] [Accepted: 01/31/2022] [Indexed: 11/18/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that often infects individuals with the genetic disease cystic fibrosis, and contributes to airway blockage and loss of lung function. Natural killer (NK) cells are cytotoxic, granular lymphocytes that are part of the innate immune system. NK cell secretory granules contain the cytolytic proteins granulysin, perforin and granzymes. In addition to their cytotoxic effects on cancer and virally infected cells, NK cells have been shown to play a role in an innate defense against microbes, including bacteria. However, it is not known if NK cells kill extracellular P. aeruginosa or how bacterial killing might occur at the molecular level. Here we show that NK cells directly kill extracellular P. aeruginosa using NK effector molecules. Live cell imaging of a co-culture of YT cells, a human NK cell line, and GFP-expressing P. aeruginosa in the presence of the viability dye propidium iodide demonstrated that YT cell killing of P. aeruginosa is contact-dependent. CRISPR knockout of granulysin or perforin in YT cells had no significant effect on YT cell killing of P. aeruginosa. Pre-treatment of YT and NK cells with the serine protease inhibitor 3,4-dichloroisocoumarin (DCI) to inhibit all granzymes, resulted in an inhibition of killing. Although singular CRISPR knockout of granzyme B or H had no effect, knockout of both in YT cells completely abrogated killing of P. aeruginosa in comparison to wild type YT cell controls. Nitrocefin assays suggest that the bacterial membrane is damaged. Inhibition of killing by antioxidants suggest that ROS are required for the bactericidal mode-of-action. Taken together, these results identify that NK cells kill P. aeruginosa through a membrane damaging, contact-dependent process that requires granzyme induced ROS production, and moreover, that granzyme B and H are redundant in this killing process. Natural Killer (NK) cells comprise at least 10% of the resident lymphocytes in the lung and are increasingly recognized as an important part of the immune response to bacterial pathogens. Despite invivo studies demonstrating the importance of NK cells in the host response to the respiratory pathogen Pseudomonas aeruginosa, the mechanism of antimicrobial activity has yet to be found. Using human NK cell lines and NK cells isolated from human peripheral blood, we show that NK cells exhibit direct, contact-dependent cytotoxicity against P. aeruginosa, leading to bacterial cell death. NK cells use granzyme B and H to damage bacterial membranes and permeabilize the cells. We provide evidence that this leads to increased reactive oxygen species (ROS) in the bacteria that kills them. Furthermore, granzyme function appears to be redundant because loss of function by one granzyme is rescued by the activity of the other. These findings identify a role for granzymes in the antibacterial functions of NK cells, providing new insight into the host response to P. aeruginosa infections.
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Affiliation(s)
- David D. Feehan
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Khusraw Jamil
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Maria J. Polyak
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Henry Ogbomo
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
- Department of Family Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Mark Hasell
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Shu Shun LI
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Richard F. Xiang
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Michael Parkins
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Joseph A. Trapani
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia
| | - Joe J. Harrison
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Christopher H. Mody
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, Calgary, Alberta, Canada
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
- * E-mail:
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Khalid HN, Elghobashy YAE, Elsayed AN. GNLY Gene Polymorphism: A Potential Role in Understanding Psoriasis Pathogenesis. J Cosmet Dermatol 2022; 21:4805-4809. [DOI: 10.1111/jocd.14792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/28/2021] [Accepted: 01/11/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Hesham Nabil Khalid
- Dermatology Andrology & STDs department Faculty of Medicine Menoufia University Menoufia Egypt
| | | | - Asmaa Nagy Elsayed
- Resident of Dermatology Andrology &STDs at Ministry of Health Al‐Mahala El‐Kobra Al‐Gharbia Egypt
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Krabbendam L, Heesters BA, Kradolfer CMA, Haverkate NJE, Becker MAJ, Buskens CJ, Bemelman WA, Bernink JH, Spits H. CD127+ CD94+ innate lymphoid cells expressing granulysin and perforin are expanded in patients with Crohn's disease. Nat Commun 2021; 12:5841. [PMID: 34615883 PMCID: PMC8494908 DOI: 10.1038/s41467-021-26187-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/17/2021] [Indexed: 12/24/2022] Open
Abstract
Phenotypic definition of helper ILC1 and NK cells is problematic due to overlapping markers. Recently we showed the identification of cytotoxic ILC3s characterized by expression of CD94. Here we analyse CD127+ ILCs and NK cells in intestinal lamina propria from healthy donors and Crohn's disease patients and identify two populations of CD127+CD94+ ILCs, designated population A and B, that can be distinguished on the expression of CD117, CD18 and cytotoxic molecules. Population B expresses granulysin, a cytotoxic molecule linked to bacterial lysis and/or chemotaxis of monocytes. Granulysin protein is secreted by population B cells upon stimulation with IL-15. Activation of population B in the presence of TGF-β strongly reduces the expression of cytotoxic effector molecules of population B. Strikingly, samples from individuals that suffer from active Crohn's disease display enhanced frequencies of granulysin-expressing effector CD127+CD94+ ILCs in comparison to controls. Thus this study identifies group 1 ILC populations which accumulate in inflamed intestinal tissue of Crohn's disease patients and may play a role in the pathology of the disease.
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Affiliation(s)
- L Krabbendam
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, Netherlands
| | - B A Heesters
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - C M A Kradolfer
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - N J E Haverkate
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - M A J Becker
- Tytgat Institute for Liver and Intestinal Research and Department of Gastroenterology & Hepatology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - C J Buskens
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
- Amsterdam UMC, University of Amsterdam, Department of Surgery, Amsterdam Gastroenterology & Metabolism (AG&M), Meibergdreef 9, Amsterdam, The Netherlands
| | - W A Bemelman
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
- Amsterdam UMC, University of Amsterdam, Department of Surgery, Amsterdam Gastroenterology & Metabolism (AG&M), Meibergdreef 9, Amsterdam, The Netherlands
| | - J H Bernink
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and UMC Utrecht, 3584, CT, Utrecht, The Netherlands
| | - H Spits
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute (AI&II), Cancer Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands.
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6
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Antimicrobial Peptides from Plants: A cDNA-Library Based Isolation, Purification, Characterization Approach and Elucidating Their Modes of Action. Int J Mol Sci 2021; 22:ijms22168712. [PMID: 34445412 PMCID: PMC8395713 DOI: 10.3390/ijms22168712] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/05/2021] [Accepted: 08/10/2021] [Indexed: 12/19/2022] Open
Abstract
Even in a natural ecosystem, plants are continuously threatened by various microbial diseases. To save themselves from these diverse infections, plants build a robust, multilayered immune system through their natural chemical compounds. Among the several crucial bioactive compounds possessed by plants’ immune systems, antimicrobial peptides (AMPs) rank in the first tier. These AMPs are environmentally friendly, anti-pathogenic, and do not bring harm to humans. Antimicrobial peptides can be isolated in several ways, but recombinant protein production has become increasingly popular in recent years, with the Escherichia coli expression system being the most widely used. However, the efficacy of this expression system is compromised due to the difficulty of removing endotoxin from its system. Therefore, this review suggests a high-throughput cDNA library-based plant-derived AMP isolation technique using the Bacillus subtilis expression system. This method can be performed for large-scale screening of plant sources to classify unique or homologous AMPs for the agronomic and applied field of plant studies. Furthermore, this review also focuses on the efficacy of plant AMPs, which are dependent on their numerous modes of action and exceptional structural stability to function against a wide range of invaders. To conclude, the findings from this study will be useful in investigating how novel AMPs are distributed among plants and provide detailed guidelines for an effective screening strategy of AMPs.
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Makowski M, Felício MR, Fensterseifer ICM, Franco OL, Santos NC, Gonçalves S. EcDBS1R4, an Antimicrobial Peptide Effective against Escherichia coli with In Vitro Fusogenic Ability. Int J Mol Sci 2020; 21:ijms21239104. [PMID: 33265989 PMCID: PMC7730630 DOI: 10.3390/ijms21239104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 01/18/2023] Open
Abstract
Discovering antibiotic molecules able to hold the growing spread of antimicrobial resistance is one of the most urgent endeavors that public health must tackle. The case of Gram-negative bacterial pathogens is of special concern, as they are intrinsically resistant to many antibiotics, due to an outer membrane that constitutes an effective permeability barrier. Antimicrobial peptides (AMPs) have been pointed out as potential alternatives to conventional antibiotics, as their main mechanism of action is membrane disruption, arguably less prone to elicit resistance in pathogens. Here, we investigate the in vitro activity and selectivity of EcDBS1R4, a bioinspired AMP. To this purpose, we have used bacterial cells and model membrane systems mimicking both the inner and the outer membranes of Escherichia coli, and a variety of optical spectroscopic methodologies. EcDBS1R4 is effective against the Gram-negative E. coli, ineffective against the Gram-positive Staphylococcus aureus and noncytotoxic for human cells. EcDBS1R4 does not form stable pores in E. coli, as the peptide does not dissipate its membrane potential, suggesting an unusual mechanism of action. Interestingly, EcDBS1R4 promotes a hemi-fusion of vesicles mimicking the inner membrane of E. coli. This fusogenic ability of EcDBS1R4 requires the presence of phospholipids with a negative curvature and a negative charge. This finding suggests that EcDBS1R4 promotes a large lipid spatial reorganization able to reshape membrane curvature, with interesting biological implications herein discussed.
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Affiliation(s)
- Marcin Makowski
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.M.); (M.R.F.)
| | - Mário R. Felício
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.M.); (M.R.F.)
| | - Isabel C. M. Fensterseifer
- Centro de Análises Proteômicas e Bioquímicas, Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília 71966-700, Brazil; (I.C.M.F.); (O.L.F.)
- S-Inova Biotech, Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande 79117-010, Brazil
| | - Octávio L. Franco
- Centro de Análises Proteômicas e Bioquímicas, Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília 71966-700, Brazil; (I.C.M.F.); (O.L.F.)
- S-Inova Biotech, Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande 79117-010, Brazil
| | - Nuno C. Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.M.); (M.R.F.)
- Correspondence: (N.C.S.); (S.G.)
| | - Sónia Gonçalves
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.M.); (M.R.F.)
- Correspondence: (N.C.S.); (S.G.)
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Expression and Functional Characterization of a Novel Antimicrobial Peptide: Human Beta-Defensin 118. BIOMED RESEARCH INTERNATIONAL 2020; 2020:1395304. [PMID: 33224970 PMCID: PMC7673234 DOI: 10.1155/2020/1395304] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 01/25/2023]
Abstract
Purpose β-Defensin 118 (DEFB118) is a novel host defense peptide (HDP) identified in humans. To evaluate its potentials for future utilization, the DEFB118 gene was expressed in Escherichia coli (E. coli) and the recombinant protein was fully characterized. Methods The DEFB118 protein was obtained by heterologous expression using E. coli Rosetta (DE3). Antibacterial activity of DEFB118 was determined by using various bacterial strains. IPEC-J cells challenged by E. coli K88 were used to determine its influences on inflammatory responses. Results The E. coli transformants yielded more than 250 μg/mL DEFB118 protein after 4 h induction by 1.0 mM IPTG. The DEFB118 was estimated by SDS-PAGE to be 30 kDa, and MALDI-TOF analysis verified that it is a human β-defensin 118. Importantly, the DEFB118 showed antimicrobial activities against both Gram-negative bacteria (E. coli K88 and E. coli DH5α) and Gram-positive bacteria (S. aureus and B. subtilis), with a minimum inhibitory concentration (MIC) of 4 μg/mL. Hemolytic assays showed that DEFB118 had no detrimental impact on cell viability. Additionally, DEFB118 was found to elevate the viability of IPEC-J2 cells upon E. coli K88 challenge. Moreover, DEFB118 significantly decreased cell apoptosis in the late apoptosis phase and downregulated the expression of inflammatory cytokines such as IL-1β and TNF-α in IPEC-J2 cell exposure to E. coli K88. Conclusions These results suggested a novel function of the mammalian defensins, and the antibacterial and anti-inflammatory properties of DEFB118 may allow it as a potential substitute for conventionally used antibiotics or drugs.
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Chen CB, Kuo KL, Wang CW, Lu CW, Chung-Yee Hui R, Lu KL, Chang WC, Chen WT, Yun F, Teng YC, Lee HE, Lin JY, Ho HC, Chi MH, Yu-Wei Lin Y, Chang CJ, Lin Y, Ku CL, Hung SI, Chang YC, Chung WH. Detecting Lesional Granulysin Levels for Rapid Diagnosis of Cytotoxic T lymphocyte-Mediated Bullous Skin Disorders. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2020; 9:1327-1337.e3. [PMID: 33039642 DOI: 10.1016/j.jaip.2020.09.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Bullous skin disorders are induced by different pathomechanisms and several are emergent, including Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN). Rapid diagnostic methods for SJS/TEN or cytotoxic T-lymphocyte (CTL)-mediated bullous disorders are crucial for early treatment. Granulysin, primarily expressed by CTLs, is a specific cytotoxic protein responsible for SJS/TEN and similar skin reactions. OBJECTIVE To assess granulysin levels in blister fluids to differentiate SJS/TEN and similar CTL-mediated bullous reactions from other autoimmune bullous disorders. METHODS Using ELISA, we measured granulysin in blister fluids from patients with bullous skin disorders, including SJS/TEN, erythema multiforme major, bullous fixed-drug eruption, bullous lupus erythematosus, paraneoplastic pemphigus, pemphigus vulgaris, bullous pemphigoid, purpura fulminans-related bullae, and hand-foot syndrome/hand-foot-skin reactions. We compared serum and blister granulysin levels in patients with SJS/TEN presenting varying severity, monitoring serial granulysin levels from acute to late stages. RESULTS Overall, 144 patients presenting with bullous skin disorders were enrolled. Blister granulysin levels (mean ± SD) in CTL-mediated disorders, including TEN (n = 28; 3938.7 ± 3475.7), SJS-TEN overlapping (n = 22; 1440.4 ± 1179.6), SJS (n = 14; 542.0 ± 503.2), erythema multiforme major (n = 7; 766.3 ± 1073.7), generalized bullous fixed-drug eruption (n = 10; 720.4 ± 858.3), and localized bullous fixed-drug eruption (n = 16; 69.0 ± 56.4), were significantly higher than in non-CTL-mediated bullous disorders (P < .0001), including bullous lupus erythematosus (n = 3; 22.7 ± 20.1), paraneoplastic pemphigus (n = 3; 20.3 ± 8.6), pemphigus vulgaris (n = 3; 4.4 ± 2.8), bullous pemphigoid (n = 18; 4.0 ± 2.7), purpura fulminans (n = 4; 5.9 ± 5.5), and hand-foot syndrome/hand-foot-skin reactions (n = 6; 4.6 ± 3.5). Blister granulysin levels correlated with clinical severity of SJS/TEN (P < .0001). CONCLUSIONS Determination of blister granulysin levels is a noninvasive and useful tool for rapid differential diagnosis of SJS/TEN and other similar CTL-mediated bullous skin disorders for treatment selection.
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Affiliation(s)
- Chun-Bing Chen
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; Whole-Genome Research Core Laboratory of Human Diseases, Chang Gung Memorial Hospital, Keelung, Taiwan; Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Kang-Ling Kuo
- Department of Dermatology, Lin Shin Hospital, Taichung, Taiwan
| | - Chuang-Wei Wang
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Chun-Wei Lu
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan; Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Rosaline Chung-Yee Hui
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Kun-Lin Lu
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Wan-Chun Chang
- Division of Translational Therapeutics, Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada; British Columbia Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Wei-Ti Chen
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Fu Yun
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Chuan Teng
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Hua-En Lee
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Jing-Yi Lin
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Hsin-Chun Ho
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Min-Hui Chi
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Yang Yu-Wei Lin
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan
| | - Chee Jen Chang
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Research Services Center for Health Information, Chang Gung University, Taoyuan, Taiwan; Clinical Informatics and Medical Statistics Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Yu Lin
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Research Services Center for Health Information, Chang Gung University, Taoyuan, Taiwan; Clinical Informatics and Medical Statistics Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Lung Ku
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan, Taiwan; Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shuen-Iu Hung
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Ya-Ching Chang
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
| | - Wen-Hung Chung
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taipei, Keelung, Taoyuan, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; Whole-Genome Research Core Laboratory of Human Diseases, Chang Gung Memorial Hospital, Keelung, Taiwan; Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan; Department of Dermatology, Beijing Tsinghua Chang Gung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China; Department of Dermatology, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China; Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan.
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10
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Human MAIT cell cytolytic effector proteins synergize to overcome carbapenem resistance in Escherichia coli. PLoS Biol 2020; 18:e3000644. [PMID: 32511236 PMCID: PMC7302869 DOI: 10.1371/journal.pbio.3000644] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 06/18/2020] [Accepted: 05/18/2020] [Indexed: 02/07/2023] Open
Abstract
Mucosa-associated invariant T (MAIT) cells are abundant antimicrobial T cells in humans and recognize antigens derived from the microbial riboflavin biosynthetic pathway presented by the MHC-Ib-related protein (MR1). However, the mechanisms responsible for MAIT cell antimicrobial activity are not fully understood, and the efficacy of these mechanisms against antibiotic resistant bacteria has not been explored. Here, we show that MAIT cells mediate MR1-restricted antimicrobial activity against Escherichia coli clinical strains in a manner dependent on the activity of cytolytic proteins but independent of production of pro-inflammatory cytokines or induction of apoptosis in infected cells. The combined action of the pore-forming antimicrobial protein granulysin and the serine protease granzyme B released in response to T cell receptor (TCR)-mediated recognition of MR1-presented antigen is essential to mediate control against both cell-associated and free-living, extracellular forms of E. coli. Furthermore, MAIT cell-mediated bacterial control extends to multidrug-resistant E. coli primary clinical isolates additionally resistant to carbapenems, a class of last resort antibiotics. Notably, high levels of granulysin and granzyme B in the MAIT cell secretomes directly damage bacterial cells by increasing their permeability, rendering initially resistant E. coli susceptible to the bactericidal activity of carbapenems. These findings define the role of cytolytic effector proteins in MAIT cell-mediated antimicrobial activity and indicate that granulysin and granzyme B synergize to restore carbapenem bactericidal activity and overcome carbapenem resistance in E. coli. Mucosa-associated invariant T (MAIT) cells are abundant antimicrobial T cells in humans that recognize bacterial metabolites. This study shows that MAIT cells exert potent antimicrobial activity against both cell-associated and extracellular forms of Escherichia coli, including strains that are resistant to the last resort antibiotics carbapenems.
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11
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Li SS, Saleh M, Xiang RF, Ogbomo H, Stack D, Huston SH, Mody CH. Natural killer cells kill Burkholderia cepacia complex via a contact-dependent and cytolytic mechanism. Int Immunol 2020; 31:385-396. [PMID: 31051036 DOI: 10.1093/intimm/dxz016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 04/19/2019] [Indexed: 12/15/2022] Open
Abstract
Burkholderia cepacia complex (Bcc), which includes B. cenocepacia and B. multivorans, pose a life-threatening risk to patients with cystic fibrosis. Eradication of Bcc is difficult due to the high level of intrinsic resistance to antibiotics, and failure of many innate immune cells to control the infection. Because of the pathogenesis of Bcc infections, we wondered if a novel mechanism of microbial host defense involving direct antibacterial activity by natural killer (NK) cells might play a role in the control of Bcc. We demonstrate that NK cells bound Burkholderia, resulting in Src family kinase activation as measured by protein tyrosine phosphorylation, granule release of effector proteins such as perforin and contact-dependent killing of the bacteria. These studies provide a means by which NK cells could play a role in host defense against Bcc infection.
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Affiliation(s)
- Shu Shun Li
- Department of Microbiology, Immunology and Infectious Diseases, Alberta, Canada.,The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Alberta, Canada
| | - Marwah Saleh
- Department of Microbiology, Immunology and Infectious Diseases, Alberta, Canada
| | - Richard F Xiang
- Department of Microbiology, Immunology and Infectious Diseases, Alberta, Canada.,The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Alberta, Canada
| | - Henry Ogbomo
- Department of Microbiology, Immunology and Infectious Diseases, Alberta, Canada.,The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Alberta, Canada
| | - Danuta Stack
- Department of Microbiology, Immunology and Infectious Diseases, Alberta, Canada.,The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Alberta, Canada
| | - Shaunna H Huston
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Alberta, Canada
| | - Christopher H Mody
- Department of Microbiology, Immunology and Infectious Diseases, Alberta, Canada.,The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Alberta, Canada.,Department of Medicine, University of Calgary, Calgary, Alberta, Canada
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12
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Konreddy AK, Rani GU, Lee K, Choi Y. Recent Drug-Repurposing-Driven Advances in the Discovery of Novel Antibiotics. Curr Med Chem 2019; 26:5363-5388. [PMID: 29984648 DOI: 10.2174/0929867325666180706101404] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 04/26/2018] [Accepted: 05/03/2018] [Indexed: 12/18/2022]
Abstract
Drug repurposing is a safe and successful pathway to speed up the novel drug discovery and development processes compared with de novo drug discovery approaches. Drug repurposing uses FDA-approved drugs and drugs that failed in clinical trials, which have detailed information on potential toxicity, formulation, and pharmacology. Technical advancements in the informatics, genomics, and biological sciences account for the major success of drug repurposing in identifying secondary indications of existing drugs. Drug repurposing is playing a vital role in filling the gap in the discovery of potential antibiotics. Bacterial infections emerged as an ever-increasing global public health threat by dint of multidrug resistance to existing drugs. This raises the urgent need of development of new antibiotics that can effectively fight multidrug-resistant bacterial infections (MDRBIs). The present review describes the key role of drug repurposing in the development of antibiotics during 2016-2017 and of the details of recently FDA-approved antibiotics, pipeline antibiotics, and antibacterial properties of various FDA-approved drugs of anti-cancer, anti-fungal, anti-hyperlipidemia, antiinflammatory, anti-malarial, anti-parasitic, anti-viral, genetic disorder, immune modulator, etc. Further, in view of combination therapies with the existing antibiotics, their potential for new implications for MDRBIs is discussed. The current review may provide essential data for the development of quick, safe, effective, and novel antibiotics for current needs and suggest acuity in its effective implications for inhibiting MDRBIs by repurposing existing drugs.
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Affiliation(s)
- Ananda Kumar Konreddy
- College of Life Sciences and Biotechnology, Korea University, Seoul 136- 713, South Korea
| | - Grandhe Usha Rani
- College of Pharmacy, Dongguk University-Seoul, Goyang 410-820, South Korea
| | - Kyeong Lee
- College of Pharmacy, Dongguk University-Seoul, Goyang 410-820, South Korea
| | - Yongseok Choi
- College of Life Sciences and Biotechnology, Korea University, Seoul 136- 713, South Korea
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13
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Xie K, Xie H, Su G, Chen D, Yu B, Mao X, Huang Z, Yu J, Luo J, Zheng P, Luo Y, He J. β-Defensin 129 Attenuates Bacterial Endotoxin-Induced Inflammation and Intestinal Epithelial Cell Apoptosis. Front Immunol 2019; 10:2333. [PMID: 31636641 PMCID: PMC6787771 DOI: 10.3389/fimmu.2019.02333] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 09/16/2019] [Indexed: 12/25/2022] Open
Abstract
Defensins have attracted considerable research interest worldwide because of their potential to serve as a substitute for antibiotics. In this study, we characterized a novel porcine β-defensin (pBD129) and explored its role in alleviating bacterial endotoxin-induced inflammation and intestinal epithelium atrophy. The pBD129 gene was cloned and expressed in Escherichia coli. A recombinant pBD129 protein was also purified. To explore its role in alleviating the endotoxin-induced inflammation, mice, with or without lipopolysaccharide (LPS) challenge were treated by pBD129 at different doses. The recombinant pBD129 showed significant antimicrobial activities against the E. coli and Streptococcus with a minimal inhibitory concentration (MICs) of 32 μg/mL. Hemolytic assays showed that the pBD129 had no detrimental impact on cell viabilities. Interestingly, we found that pBD129 attenuated LPS-induced inflammatory responses by decreasing serum concentrations of inflammatory cytokines, such as the IL-1β, IL-6, and TNF-α (P < 0.05). Moreover, pBD129 elevated the intestinal villus height (P < 0.05) and enhanced the expression and localization of the major tight junction-associated protein ZO-1 in LPS-challenged mice. Additionally, pDB129 at a high dose significantly decreased serum diamine oxidase (DAO) concentration (P < 0.05) and reduced intestinal epithelium cell apoptosis (P < 0.05) in LPS-challenged mice. Importantly, pBD129 elevated the expression level of Bcl-2-associated death promoter (Bcl-2), but down-regulated the expression levels of apoptosis-related genes such as the B-cell lymphoma-2-associated X protein (Bax), BH3-interacting domain death agonist (Bid), cysteinyl aspartate-specific proteinase-3 (Caspase-3), and caspase-9 in the intestinal mucosa (P < 0.05). These results suggested a novel function of the mammalian defensins, and the anti-bacterial and anti-inflammatory properties of pBD129 may allow it a potential substitute for conventionally used antibiotics or drugs.
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Affiliation(s)
- Kunhong Xie
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Hongmei Xie
- Shandong Vocational Animal Science and Veterinary College, Weifang, China
| | - Guoqi Su
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Daiwen Chen
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Bing Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Xiangbing Mao
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Zhiqing Huang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Jie Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Junqiu Luo
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Ping Zheng
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Yuheng Luo
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Jun He
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
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14
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Ibáñez-Pérez R, Guerrero-Ochoa P, Al-Wasaby S, Navarro R, Tapia-Galisteo A, De Miguel D, Gonzalo O, Conde B, Martínez-Lostao L, Hurtado-Guerrero R, Sanz L, Anel A. Anti-tumoral potential of a human granulysin-based, CEA-targeted cytolytic immunotoxin. Oncoimmunology 2019; 8:1641392. [PMID: 31646080 DOI: 10.1080/2162402x.2019.1641392] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 07/01/2019] [Accepted: 07/03/2019] [Indexed: 12/12/2022] Open
Abstract
Granulysin is a protein present in the granules of human cytotoxic T lymphocytes (CTL) and natural killer (NK) cells, with cytolytic activity against microbes and tumors. Previous work demonstrated the therapeutic effect of intratumoral injection of recombinant granulysin using in vivo models of breast cancer and multiple myeloma. In the present work we have developed a granulysin gene fusion to the anti-carcinoembryonic antigen (CEA/CEACAM5) single chain Fv antibody fragment MFE23. Both granulysin and the granulysin-based immunotoxin were expressed in Pichia pastoris. The immunotoxin specifically recognized CEA, purified or expressed on the cell surface. Moreover, the bioactivity of the immunotoxin against several CEA+ cell lines was higher than that of granulysin alone. Granulysin and the immunotoxin were tested as a treatment in in vivo xenograft models in athymic mice. When injected intratumorally, both granulysin and the immunotoxin were able to inhibit tumor growth. Furthermore, systemic administration of the immunotoxin demonstrated a decrease in tumor growth in a CEA+ tumor-bearing mouse model, whereas granulysin did not exhibit a therapeutic effect. This is the first granulysin-based immunotoxin and the present work constitutes the proof of concept of its therapeutic potential.
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Affiliation(s)
- Raquel Ibáñez-Pérez
- Apoptosis, Immunity and Cancer Group, University of Zaragoza/Aragón Health Research Institute (IIS-Aragón), Zaragoza, Spain
| | - Patricia Guerrero-Ochoa
- Apoptosis, Immunity and Cancer Group, University of Zaragoza/Aragón Health Research Institute (IIS-Aragón), Zaragoza, Spain
| | - Sameer Al-Wasaby
- Apoptosis, Immunity and Cancer Group, University of Zaragoza/Aragón Health Research Institute (IIS-Aragón), Zaragoza, Spain
| | - Rocío Navarro
- Molecular Immunology Unit, "Puerta de Hierro" University Hospital, Majadahonda, Madrid, Spain
| | - Antonio Tapia-Galisteo
- Molecular Immunology Unit, "Puerta de Hierro" University Hospital, Majadahonda, Madrid, Spain
| | - Diego De Miguel
- Apoptosis, Immunity and Cancer Group, University of Zaragoza/Aragón Health Research Institute (IIS-Aragón), Zaragoza, Spain
| | - Oscar Gonzalo
- Apoptosis, Immunity and Cancer Group, University of Zaragoza/Aragón Health Research Institute (IIS-Aragón), Zaragoza, Spain
| | - Blanca Conde
- Apoptosis, Immunity and Cancer Group, University of Zaragoza/Aragón Health Research Institute (IIS-Aragón), Zaragoza, Spain
| | - Luis Martínez-Lostao
- Immunology Department, "Lozano Blesa" University Clinical Hospital, Zaragoza, Spain
| | - Ramón Hurtado-Guerrero
- Biocomputation and Physics of Complex Systems Institute (BIFI), University of Zaragoza, Zaragoza, Spain.,ARAID Foundation, Zaragoza, Spain
| | - Laura Sanz
- Molecular Immunology Unit, "Puerta de Hierro" University Hospital, Majadahonda, Madrid, Spain
| | - Alberto Anel
- Apoptosis, Immunity and Cancer Group, University of Zaragoza/Aragón Health Research Institute (IIS-Aragón), Zaragoza, Spain
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15
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Lettau M, Dietz M, Dohmen K, Leippe M, Kabelitz D, Janssen O. Granulysin species segregate to different lysosome-related effector vesicles (LREV) and get mobilized by either classical or non-classical degranulation. Mol Immunol 2019; 107:44-53. [DOI: 10.1016/j.molimm.2018.12.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/12/2018] [Accepted: 12/29/2018] [Indexed: 01/06/2023]
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16
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Ermis E, Celik SK, Solak N, Genc GC, Dursun A. The role of GNLY gene polymorphisms in psoriasis pathogenesis. An Bras Dermatol 2019; 94:198-203. [PMID: 31090825 PMCID: PMC6486070 DOI: 10.1590/abd1806-4841.20198188] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 08/01/2018] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Psoriasis is a systemic inflammatory disorder that involves complex pathogenic interactions between the innate and adaptive immune systems. The most accepted mechanism in the etiopathogenesis of psoriasis is the induction of inflammation with keratinocyte hyperproliferation. Granulysin (GNLY) is a cytolytic antimicrobial peptide (AMP) that is secreted together with granzyme and perforin from the granules of human cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells. It has been immunohistochemically proven that the expression of granulysin is increased in lesions of psoriasis. OBJECTIVE This study aimed to investigate the relationship between psoriasis disease and granulysin gene polymorphisms. METHODS GNLY rs7908 and rs10180391 polymorphisms were studied by PCR-RFLP in 100 psoriasis patients under treatment in the Dermatology Polyclinic of Bulent Ecevit University. In addition, 100 healthy individuals with similar age and sex distribution were used as a control group. RESULTS In the control group, GNLY rs7908 CC genotype was significantly higher than in psoriasis patients (P= 0.031; OR= 0.305; Cl= 0.305 (0.121 - 0.773). In our study, the genotype distributions in patients and control groups were GNLY rs7908 (SNP) GG (51%, 37%), GC (41%, 44%), CC (8%, 19%); GNLY rs10180391 (SNP) from the CC (41%, 44%), CT (42%, % 41), TT (17%, 15%). STUDY LIMITATIONS The study only included Turkish patients. CONCLUSION Our findings showed that GNLY rs7908 CC genotype and C allele had a protective effect against psoriasis and decreased the disease severity (according to PASI score), whereas rs10180391 SNP did not show any effective role in psoriasis pathogenesis.
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Affiliation(s)
- Esra Ermis
- Department of Molecular Biology and Genetics, Faculty of
Sciences and Arts, Bulent Ecevit University, Zonguldak, Turkey
| | - Sevim Karakas Celik
- Department of Molecular Biology and Genetics, Faculty of
Sciences and Arts, Bulent Ecevit University, Zonguldak, Turkey
| | - Nilgun Solak
- Department of Dermatology, Faculty of Medicine, Bulent
Ecevit University, Zonguldak, Turkey
| | - Gunes Cakmak Genc
- Department of Medical Genetics, Faculty of Medicine,
Bulent Ecevit University, Zonguldak, Turkey
| | - Ahmet Dursun
- Department of Medical Genetics, Faculty of Medicine,
Bulent Ecevit University, Zonguldak, Turkey
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17
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Mody CH, Ogbomo H, Xiang RF, Kyei SK, Feehan D, Islam A, Li SS. Microbial killing by NK cells. J Leukoc Biol 2019; 105:1285-1296. [PMID: 30821868 DOI: 10.1002/jlb.mr0718-298r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 01/21/2019] [Accepted: 02/10/2019] [Indexed: 11/07/2022] Open
Abstract
It is now evident that NK cells kill bacteria, fungi, and parasites in addition to tumor and virus-infected cells. In addition to a number of recent publications that have identified the receptors and ligands, and mechanisms of cytotoxicity, new insights are reflected in the reports from researchers all over the world at the 17th Meeting of the Society for Natural Immunity held in San Antonio, TX, USA from May 28 through June 1, 2018. We will provide an overview of the field and discuss how the presentations at the meeting might shape our knowledge and future directions in the field.
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Affiliation(s)
- Christopher H Mody
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Henry Ogbomo
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Richard F Xiang
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Stephen K Kyei
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - David Feehan
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Anowara Islam
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Shu Shun Li
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
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18
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Belizário JE, Neyra JM, Setúbal Destro Rodrigues MF. When and how NK cell-induced programmed cell death benefits immunological protection against intracellular pathogen infection. Innate Immun 2018; 24:452-465. [PMID: 30236030 PMCID: PMC6830868 DOI: 10.1177/1753425918800200] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
NK cells are innate lymphoid cells that exert a key role in immune surveillance
through the recognition and elimination of transformed cells and viral,
bacterial, and protozoan pathogen-infected cells without prior sensitization.
Elucidating when and how NK cell-induced intracellular microbial cell death
functions in the resolution of infection and host inflammation has been an
important topic of investigation. NK cell activation requires the engagement of
specific activating, co-stimulatory, and inhibitory receptors which control
positively and negatively their differentiation, memory, and exhaustion. NK
cells secrete diverse cytokines, including IFN-γ, TNF-α/β, CD95/FasL, and TRAIL,
as well as cytoplasmic cytotoxic granules containing perforin, granulysin, and
granzymes A and B. Paradoxically, NK cells also kill other immune cells like
macrophages, dendritic cells, and hyper-activated T cells, thus turning off
self-immune reactions. Here we first provide an overview of NK cell biology, and
then we describe and discuss the life–death signals that connect the microbial
pathogen sensors to the inflammasomes and finally to cell death signaling
pathways. We focus on caspase-mediated cell death by apoptosis and
pro-inflammatory and non-caspase-mediated cell death by necroptosis, as well as
inflammasome- and caspase-mediated pyroptosis.
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19
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Lee MW, Lee EY, Wong GCL. What Can Pleiotropic Proteins in Innate Immunity Teach Us about Bioconjugation and Molecular Design? Bioconjug Chem 2018; 29:2127-2139. [PMID: 29771496 DOI: 10.1021/acs.bioconjchem.8b00176] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A common bioengineering strategy to add function to a given molecule is by conjugation of a new moiety onto that molecule. Adding multiple functions in this way becomes increasingly challenging and leads to composite molecules with larger molecular weights. In this review, we attempt to gain a new perspective by looking at this problem in reverse, by examining nature's strategies of multiplexing different functions into the same pleiotropic molecule using emerging analysis techniques such as machine learning. We concentrate on examples from the innate immune system, which employs a finite repertoire of molecules for a broad range of tasks. An improved understanding of how diverse functions are multiplexed into a single molecule can inspire new approaches for the deterministic design of multifunctional molecules.
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Chang TW, Wei SY, Wang SH, Wei HM, Wang YJ, Wang CF, Chen C, Liao YD. Hydrophobic residues are critical for the helix-forming, hemolytic and bactericidal activities of amphipathic antimicrobial peptide TP4. PLoS One 2017; 12:e0186442. [PMID: 29040295 PMCID: PMC5645128 DOI: 10.1371/journal.pone.0186442] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 10/02/2017] [Indexed: 12/20/2022] Open
Abstract
Antimicrobial peptides are important components of the host innate defense mechanism against invading pathogens, especially for drug-resistant bacteria. In addition to bactericidal activity, the 25 residue peptide TP4 isolated from Nile tilapia also stimulates cell proliferation and regulates the innate immune system in mice. In this report, TP4 hyperpolarized and depolarized the membrane potential of Pseudomonas aeruginosa at sub-lethal and lethal concentrations. It also inhibited and eradicated biofilm formation. The in vitro binding of TP4 to bacterial outer membrane target protein, OprI, was markedly enhanced by a membrane-like surfactant sarkosyl and lipopolysaccharide, which converted TP4 into an α-helix. The solution structure of TP4 in dodecylphosphocholine was solved by NMR analyses. It contained a typical α-helix at residues Phe10-Arg22 and a distorted helical segment at Ile6-Phe10, as well as a hydrophobic core at the N-terminus and a cationic patch at the C-terminus. Residues Ile16, Leu19 and Ile20 in the hydrophobic face of the main helix were critical for the integrity of amphipathic structure, other hydrophobic residues played important roles in hemolytic and bactericidal activities. A model for the assembly of helical TP4 embedded in sarkosyl vesicle is proposed. This study may provide valuable insight for engineering AMPs to have potent bactericidal activity but low hemolytic activity.
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Affiliation(s)
- Ting-Wei Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Shu-Yi Wei
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Shih-Han Wang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Hung-Mu Wei
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yu-June Wang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Chiu-Feng Wang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Chinpan Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - You-Di Liao
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
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Martín-Antonio B, Suñe G, Perez-Amill L, Castella M, Urbano-Ispizua A. Natural Killer Cells: Angels and Devils for Immunotherapy. Int J Mol Sci 2017; 18:ijms18091868. [PMID: 28850071 PMCID: PMC5618517 DOI: 10.3390/ijms18091868] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 08/16/2017] [Accepted: 08/19/2017] [Indexed: 02/06/2023] Open
Abstract
In recent years, the relevance of the immune system to fight cancer has led to the development of immunotherapy, including the adoptive cell transfer of immune cells, such as natural killer (NK) cells and chimeric antigen receptors (CAR)-modified T cells. The discovery of donor NK cells’ anti-tumor activity in acute myeloid leukemia patients receiving allogeneic stem cell transplantation (allo-SCT) was the trigger to conduct many clinical trials infusing NK cells. Surprisingly, many of these studies did not obtain optimal results, suggesting that many different NK cell parameters combined with the best clinical protocol need to be optimized. Various parameters including the high array of activating receptors that NK cells have, the source of NK cells selected to treat patients, different cytotoxic mechanisms that NK cells activate depending on the target cell and tumor cell survival mechanisms need to be considered before choosing the best immunotherapeutic strategy using NK cells. In this review, we will discuss these parameters to help improve current strategies using NK cells in cancer therapy. Moreover, the chimeric antigen receptor (CAR) modification, which has revolutionized the concept of immunotherapy, will be discussed in the context of NK cells. Lastly, the dark side of NK cells and their involvement in inflammation will also be discussed.
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Affiliation(s)
- Beatriz Martín-Antonio
- Department of Hematology, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain.
- Josep Carreras Leukaemia Research Institute, 08036 Barcelona, Spain.
| | - Guillermo Suñe
- Department of Hematology, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain.
- Josep Carreras Leukaemia Research Institute, 08036 Barcelona, Spain.
| | - Lorena Perez-Amill
- Department of Hematology, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain.
| | - Maria Castella
- Department of Hematology, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain.
- Josep Carreras Leukaemia Research Institute, 08036 Barcelona, Spain.
| | - Alvaro Urbano-Ispizua
- Department of Hematology, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain.
- Josep Carreras Leukaemia Research Institute, 08036 Barcelona, Spain.
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Al-Asmari AK, Alamri MA, Almasoudi AS, Abbasmanthiri R, Mahfoud M. Evaluation of the in vitro antimicrobial activity of selected Saudi scorpion venoms tested against multidrug-resistant micro-organisms. J Glob Antimicrob Resist 2017; 10:14-18. [PMID: 28587870 DOI: 10.1016/j.jgar.2017.03.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 02/06/2017] [Accepted: 03/04/2017] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVES Scorpion venoms are a rich source of bioactive peptides with promising clinical value that may lead to the discovery and development of new drugs. The present study was designed to evaluate the in vitro antimicrobial activities of the venoms extracted from three medically important Saudi scorpions (Androctonus crassicauda, Androctonus bicolor and Leiurus quinquestriatus). METHODS Antimicrobial assays were performed using a microplate growth inhibition assay against 10 multidrug-resistant (MDR) micro-organisms (4 Gram-negative bacteria, 2 Gram-positive bacteria and 4 fungi and yeasts) at concentrations ranging from 0 to 20mg/mL of each venom. Following qualitative analysis, dose-response assays were performed for bacterial and fungal killing curves using the MTT colorimetric assay. RESULTS Among the three tested scorpion venoms, only L. quinquestriatus venom showed significant broad-spectrum antimicrobial activity in a dose-dependent manner from 5 to 20mg/mL. Leiurus quinquestriatus venom inhibited the growth and survival of MDR Escherichia coli (55.2%), Acinetobacter baumannii (50.6%), Klebsiella pneumoniae (35.1%), Pseudomonas aeruginosa (31.3%), Staphylococcus aureus (36.4%), Enterococcus faecalis (47.6%), Candida albicans (31.2%) and Candida glabrata (39.0%), whereas no significant activity against Fusarium oxysporum and Aspergillus flavus was observed. In contrast, the venoms of A. crassicauda and A. bicolor did not show noticeable antimicrobial activity against any of the tested organisms. CONCLUSIONS The findings of the current study demonstrate that L. quinquestriatus venom possesses antimicrobial activity and thus can be used as a template for designing and development of novel antimicrobial drugs.
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Affiliation(s)
- Abdulrahman K Al-Asmari
- Scientific Research Center, Prince Sultan Military Medical City, P.O. Box 7897, Riyadh 11159, Saudi Arabia
| | - Meshref Ali Alamri
- Department of Academic Affairs and Training, Prince Sultan Military Medical City, Riyadh 11159, Saudi Arabia
| | - Aqeel Salman Almasoudi
- Scientific Research Center, Prince Sultan Military Medical City, P.O. Box 7897, Riyadh 11159, Saudi Arabia
| | - Rajamohamed Abbasmanthiri
- Scientific Research Center, Prince Sultan Military Medical City, P.O. Box 7897, Riyadh 11159, Saudi Arabia
| | - Maysa Mahfoud
- Scientific Research Center, Prince Sultan Military Medical City, P.O. Box 7897, Riyadh 11159, Saudi Arabia.
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Screening, Expression, Purification and Functional Characterization of Novel Antimicrobial Peptide Genes from Hermetia illucens (L.). PLoS One 2017; 12:e0169582. [PMID: 28056070 PMCID: PMC5215879 DOI: 10.1371/journal.pone.0169582] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Accepted: 12/19/2016] [Indexed: 01/02/2023] Open
Abstract
Antimicrobial peptides from a wide spectrum of insects possess potent microbicidal properties against microbial-related diseases. In this study, seven new gene fragments of three types of antimicrobial peptides were obtained from Hermetia illucens (L), and were named cecropinZ1, sarcotoxin1, sarcotoxin (2a), sarcotoxin (2b), sarcotoxin3, stomoxynZH1, and stomoxynZH1(a). Among these genes, a 189-basepair gene (stomoxynZH1) was cloned into the pET32a expression vector and expressed in the Escherichia coli as a fusion protein with thioredoxin. Results show that Trx-stomoxynZH1 exhibits diverse inhibitory activity on various pathogens, including Gram-positive bacterium Staphylococcus aureus, Gram-negative bacterium Escherichia coli, fungus Rhizoctonia solani Khün (rice)-10, and fungus Sclerotinia sclerotiorum (Lib.) de Bary-14. The minimum inhibitory concentration of Trx-stomoxynZH1 is higher against Gram-positive bacteria than against Gram-negative bacteria but similar between the fungal strains. These results indicate that H. illucens (L.) could provide a rich source for the discovery of novel antimicrobial peptides. Importantly, stomoxynZH1 displays a potential benefit in controlling antibiotic-resistant pathogens.
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Tseng TS, Wang SH, Chang TW, Wei HM, Wang YJ, Tsai KC, Liao YD, Chen C. Sarkosyl-Induced Helical Structure of an Antimicrobial Peptide GW-Q6 Plays an Essential Role in the Binding of Surface Receptor OprI in Pseudomonas aeruginosa. PLoS One 2016; 11:e0164597. [PMID: 27727309 PMCID: PMC5058510 DOI: 10.1371/journal.pone.0164597] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 09/27/2016] [Indexed: 12/27/2022] Open
Abstract
The emergence of antibiotic-resistant microbial strains has become a public health issue and there is an urgent need to develop new anti-infective molecules. Although natural antimicrobial peptides (AMPs) can exert bactericidal activities, they have not shown clinical efficacy. The limitations of native peptides may be overcome with rational design and synthesis. Here, we provide evidence that the bactericidal activity of a synthetic peptide, GW-Q6, against Pseudomonas aeruginosa is mediated through outer membrane protein OprI. Hyperpolarization/depolarization of membrane potential and increase of membrane permeability were observed after GW-Q6 treatment. Helical structure as well as hydrophobicity was induced by an amphipathic surfactant, sarkosyl, for binding to OprI and possible to membrane. NMR studies demonstrated GW-Q6 is an amphipathic α-helical structure in DPC micelles. The paramagnetic relaxation enhancement (PRE) approach revealed that GW-Q6 orients its α-helix segment (K7-K17) into DPC micelles. Additionally, this α-helix segment is critical for membrane permeabilization and antimicrobial activity. Moreover, residues K3, K7, and K14 could be critical for helical formation and membrane binding while residues Y19 and W20 for directing the C-terminus of the peptide to the surface of micelle. Taken together, our study provides mechanistic insights into the mode of action of the GW-Q6 peptide and suggests its applicability in modifying and developing potent AMPs as therapeutic agents.
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Affiliation(s)
- Tien-Sheng Tseng
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Shih-Han Wang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Ting-Wei Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Hung-Mu Wei
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yu-June Wang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Keng-Chang Tsai
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
- The Ph.D. Program for Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - You-Di Liao
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- * E-mail: (YDL); (CC)
| | - Chinpan Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- * E-mail: (YDL); (CC)
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