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Liu Q, Liu Q, Meng H, Lv H, Liu Y, Liu J, Wang H, He L, Qin J, Wang Y, Dai Y, Otto M, Li M. Staphylococcus epidermidis Contributes to Healthy Maturation of the Nasal Microbiome by Stimulating Antimicrobial Peptide Production. Cell Host Microbe 2020; 27:68-78.e5. [PMID: 31866425 PMCID: PMC10988655 DOI: 10.1016/j.chom.2019.11.003] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 08/19/2019] [Accepted: 11/07/2019] [Indexed: 12/18/2022]
Abstract
The composition of the human microbiome profoundly impacts human well-being. However, the mechanisms underlying microbiome maturation are poorly understood. The nasal microbiome is of particular importance as a source of many respiratory infections. Here, we performed a large sequencing and culture-based analysis of the human nasal microbiota from different age groups. We observed a significant decline of pathogenic bacteria before adulthood, with an increase of the commensal Staphylococcus epidermidis. In seniors, this effect was partially reversed. In vitro, many S. epidermidis isolates stimulated nasal epithelia to produce antimicrobial peptides, killing pathogenic competitors, while S. epidermidis itself proved highly resistant owing to its exceptional capacity to form biofilms. Furthermore, S. epidermidis isolates with high antimicrobial peptide-inducing and biofilm-forming capacities outcompeted pathogenic bacteria during nasal colonization in vivo. Our study identifies a pivotal role of S. epidermidis in healthy maturation of the nasal microbiome, which is achieved at least in part by symbiotic cooperation with innate host defense.
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Affiliation(s)
- Qian Liu
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Qingyun Liu
- Key Laboratory of Medical Molecular Virology, Ministry of Education and Health, School of Basic Medical Sciences, Shanghai Public Health Clinical Center, Fudan University, Shanghai 200032, China
| | - Hongwei Meng
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Huiying Lv
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Yao Liu
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Junlan Liu
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Hua Wang
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Lei He
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Juanxiu Qin
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Yanan Wang
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Yingxin Dai
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Michael Otto
- Pathogen Molecular Genetics Section, Laboratory of Bacteriology, National Institute of Allergy and Infectious Diseases, U.S. National Institutes of Health, Bethesda, MD 20814, USA.
| | - Min Li
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China.
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202
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Yang LL, Zhan MY, Zhuo YL, Dang XL, Li MY, Xu Y, Zhou XH, Yu XQ, Rao XJ. Characterization of the active fragments of Spodoptera litura Lebocin-1. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2020; 103:e21626. [PMID: 31562754 DOI: 10.1002/arch.21626] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/09/2019] [Accepted: 09/14/2019] [Indexed: 06/10/2023]
Abstract
Insects can produce various antimicrobial peptides (AMPs) upon immune stimulation. One class of AMPs are characterized by their high proline content in certain fragments. They are generally called proline-rich antimicrobial peptides (PrAMPs). We previously reported the characterization of Spodoptera litura lebocin-1 (SlLeb-1), a PrAMP proprotein. Preliminary studies with synthetic polypeptides showed that among the four deductive active fragments, the C-terminal fragment SlLeb-1 (124-158) showed strong antibacterial activities. Here, we further characterized the antibacterial and antifungal activities of 124-158 and its four subfragments: 124-155, 124-149, 127-158, and 135-158. Only 124-158 and 127-158 could agglutinate bacteria, while 124-158 and four subfragments all could agglutinate Beauveria bassiana spores. Confocal microscopy showed that fluorescent peptides were located on the microbial surface. Fragment 135-158 lost activity completely against Escherichia coli and Staphylococcus aureus, and partially against Bacillus subtilis. Only 124-149 showed low activity against Serratia marcescens. Negative staining, transmission, and scanning electron microscopy of 124-158 treated bacteria showed different morphologies. Flow cytometry analysis of S. aureus showed that 124-158 and four subfragments changed bacterial subpopulations and caused an increase of DNA content. These results indicate that active fragments of SlLeb-1 may have diverse antimicrobial effects against different microbes. This study may provide an insight into the development of novel antimicrobial agents.
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Affiliation(s)
- Li-Ling Yang
- School of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Ming-Yue Zhan
- School of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Yu-Li Zhuo
- School of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiang-Li Dang
- School of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Mao-Ye Li
- School of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Yang Xu
- Biotechnology Center, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiu-Hong Zhou
- Biotechnology Center, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiao-Qiang Yu
- Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Xiang-Jun Rao
- School of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
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203
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Kunda NK. Antimicrobial peptides as novel therapeutics for non-small cell lung cancer. Drug Discov Today 2020; 25:238-247. [DOI: 10.1016/j.drudis.2019.11.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 11/07/2019] [Accepted: 11/24/2019] [Indexed: 01/02/2023]
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204
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Dijksteel GS, Nibbering PH, Ulrich MMW, Middelkoop E, Boekema BKHL. SPS-neutralization in tissue samples for efficacy testing of antimicrobial peptides. BMC Infect Dis 2019; 19:1093. [PMID: 31888515 PMCID: PMC6937930 DOI: 10.1186/s12879-019-4700-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 12/11/2019] [Indexed: 11/17/2022] Open
Abstract
Background Accurate determination of the efficacy of antimicrobial agents requires neutralization of residual antimicrobial activity in the samples before microbiological assessment of the number of surviving bacteria. Sodium polyanethol sulfonate (SPS) is a known neutralizer for the antimicrobial activity of aminoglycosides and polymyxins. In this study, we evaluated the ability of SPS to neutralize residual antimicrobial activity of antimicrobial peptides [SAAP-148 and pexiganan; 1% (wt/v) in PBS], antibiotics [mupirocin (Bactroban) and fusidic acid (Fucidin) in ointments; 2% (wt/wt))] and disinfectants [2% (wt/wt) silver sulfadiazine cream (SSD) and 0.5% (v/v) chlorhexidine in 70% alcohol]. Methods Homogenates of human skin models that had been exposed to various antimicrobial agents for 1 h were pipetted on top of Methicillin-resistant Staphylococcus aureus (MRSA) on agar plates to determine whether the antimicrobial agents display residual activity. To determine the optimal concentration of SPS for neutralization, antimicrobial agents were mixed with PBS or increasing doses of SPS in PBS (0.05–1% wt/v) and then 105 colony forming units (CFU)/mL MRSA were added. After 30 min incubation, the number of viable bacteria was assessed. Next, the in vitro efficacy of SAAP-148 against various gram-positive and gram-negative bacteria was determined using PBS or 0.05% (wt/v) SPS immediately after 30 min incubation of the mixture. Additionally, ex vivo excision wound models were inoculated with 105 CFU MRSA for 1 h and exposed to SAAP-148, pexiganan, chlorhexidine or PBS for 1 h. Subsequently, samples were homogenized in PBS or 0.05% (wt/v) SPS and the number of viable bacteria was assessed. Results All tested antimicrobials displayed residual activity in tissue samples, resulting in a lower recovery of surviving bacteria on agar. SPS concentrations at ≥0.05% (wt/v) were able to neutralize the antimicrobial activity of SAAP-148, pexiganan and chlorhexidine, but not of SSD, Bactroban and Fucidin. Finally, SPS-neutralization in in vitro and ex vivo efficacy tests of SAAP-148, pexiganan and chlorhexidine against gram-positive and gram-negative bacteria resulted in significantly higher numbers of CFU compared to control samples without SPS-neutralization. Conclusions SPS was successfully used to neutralize residual activity of SAAP-148, pexiganan and chlorhexidine and this prevented an overestimation of their efficacy.
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Affiliation(s)
- Gabrielle Sherella Dijksteel
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands. .,Department of Plastic, Reconstructive & Hand Surgery, Amsterdam Movement Sciences, Amsterdam University Medical Centres, Free University of Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands.
| | - Peter H Nibbering
- Department of Infectious Diseases, Leiden University Medical Centre, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Magda M W Ulrich
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands.,Department of Plastic, Reconstructive & Hand Surgery, Amsterdam Movement Sciences, Amsterdam University Medical Centres, Free University of Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
| | - Esther Middelkoop
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands.,Department of Plastic, Reconstructive & Hand Surgery, Amsterdam Movement Sciences, Amsterdam University Medical Centres, Free University of Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
| | - Bouke K H L Boekema
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands
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205
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Quinazoline-Based Antivirulence Compounds Selectively Target Salmonella PhoP/PhoQ Signal Transduction System. Antimicrob Agents Chemother 2019; 64:AAC.01744-19. [PMID: 31611347 DOI: 10.1128/aac.01744-19] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 09/27/2019] [Indexed: 01/06/2023] Open
Abstract
The rapid emergence of multidrug resistance among bacterial pathogens has become a significant challenge to human health in our century. Therefore, development of next-generation antibacterial compounds is an urgent need. Two-component signal transduction systems (TCS) are stimulus-response coupling devices that allow bacteria to sense and elaborate adaptive responses to changing environmental conditions, including the challenges that pathogenic bacteria face inside the host. The differential presence of TCS, present in bacteria but absent in the animal kingdom, makes them attractive targets in the search for new antibacterial compounds. In Salmonella enterica, the PhoP/PhoQ two-component system controls the expression of crucial phenotypes that define the ability of the pathogen to establish infection in the host. We now report the screening of 686 compounds from a GlaxoSmithKline published kinase inhibitor set in a high-throughput whole-cell assay that targets Salmonella enterica serovar Typhimurium PhoP/PhoQ. We identified a series of quinazoline compounds that showed selective and potent downregulation of PhoP/PhoQ-activated genes and define structural attributes required for their efficacy. We demonstrate that their bioactivity is due to repression of the PhoQ sensor autokinase activity mediated by interaction with its catalytic domain, acting as competitive inhibitors of ATP binding. While noncytotoxic, the hit molecules exhibit antivirulence effect by blockage of S Typhimurium intramacrophage replication. Together, these features make these quinazoline compounds stand out as exciting leads to develop a therapeutic intervention to fight salmonellosis.
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206
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Orrapin S, Intorasoot A, Roytrakul S, Dechsupa N, Kantapan J, Onphat Y, Srimek C, Sitthidet Tharinjaroen C, Anukool U, Butr-Indr B, Phunpae P, Intorasoot S. A novel recombinant javanicin with dual antifungal and anti-proliferative activities. Sci Rep 2019; 9:18417. [PMID: 31804594 PMCID: PMC6895105 DOI: 10.1038/s41598-019-55044-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 11/23/2019] [Indexed: 12/14/2022] Open
Abstract
Resistance to common drugs by microorganisms and cancers has become a major issue in modern healthcare, increasing the number of deaths worldwide. Novel therapeutic agents with a higher efficiency and less side effects for the treatment of certain diseases are urgently needed. Plant defensins have an integral role in a hosts' immune system and are attractive candidates for combatting drug-resistant microorganisms. Interestingly, some of these defensins also showed great potential due to their cytotoxic activity toward cancer cells. In this study, a defensin encoding gene was isolated from five legume seeds using 3' rapid amplification of cDNA ends (3' RACE) with degenerate primers and cDNA cloning strategies. Bioinformatic tools were used for in silico identification and the characterization of new sequences. To study the functional characteristics of these unique defensins, the gene encoded for Sesbania javanica defensin, designated as javanicin, was cloned into pTXB-1 plasmid and expressed in the Escherichia coli Origami 2 (DE3) strain. Under optimized conditions, a 34-kDa javanicin-intein fusion protein was expressed and approximately 2.5-3.5 mg/L of soluble recombinant javanicin was successfully extracted with over 90% purity. Recombinant javanicin displayed antifungal properties against human pathogenic fungi, including resistant strains, as well as cytotoxic activities toward the human breast cancer cell lines, MCF-7 & MDA-MB-231. Recombinant javanicin holds great promise as a novel therapeutic agent for further medical applications.
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Affiliation(s)
- Santhasiri Orrapin
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Amornrat Intorasoot
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Sittiruk Roytrakul
- Proteomics Research Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, 12120, Thailand
| | - Nathupakorn Dechsupa
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Jiraporn Kantapan
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Yanika Onphat
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Chutima Srimek
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Chayada Sitthidet Tharinjaroen
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
- Infectious Diseases Research Unit (IDRU), Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Usanee Anukool
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
- Infectious Diseases Research Unit (IDRU), Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Bordin Butr-Indr
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
- Infectious Diseases Research Unit (IDRU), Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Ponrut Phunpae
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
- Infectious Diseases Research Unit (IDRU), Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Sorasak Intorasoot
- Division of Clinical Microbiology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.
- Infectious Diseases Research Unit (IDRU), Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.
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207
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Dijksteel GS, Ulrich MMW, Vlig M, Nibbering PH, Cordfunke RA, Drijfhout JW, Middelkoop E, Boekema BKHL. Potential factors contributing to the poor antimicrobial efficacy of SAAP-148 in a rat wound infection model. Ann Clin Microbiol Antimicrob 2019; 18:38. [PMID: 31796055 PMCID: PMC6891976 DOI: 10.1186/s12941-019-0336-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 11/08/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND We investigated the efficacy of a synthetic antimicrobial peptide SAAP-148, which was shown to be effective against Methicillin-resistant Staphylococcus aureus (MRSA) on tape-stripped mice skin. Unexpectedly, SAAP-148 was not effective against MRSA in our pilot study using rats with excision wounds. Therefore, we investigated factors that might have contributed to the poor efficacy of SAAP-148. Subsequently, we optimised the protocol and assessed the efficacy of SAAP-148 in an adapted rat study. METHODS We incubated 100 µL of SAAP-148 with 1 cm2 of a wound dressing for 1 h and determined the unabsorbed volume of peptide solution. Furthermore, 105 colony forming units (CFU)/mL MRSA were exposed to increasing dosages of SAAP-148 in 50% (v/v) human plasma, eschar- or skin extract or PBS. After 30 min incubation, the number of viable bacteria was determined. Next, ex vivo skin models were inoculated with MRSA for 1 h and exposed to SAAP-148. Finally, excision wounds on the back of rats were inoculated with 107 CFU MRSA overnight and treated with SAAP-148 for 4 h or 24 h. Subsequently, the number of viable bacteria was determined. RESULTS Contrary to Cuticell, Parafilm and Tegaderm film, < 20% of peptide solution was recovered after incubation with gauze, Mepilex border and Opsite Post-op. Furthermore, in plasma, eschar- or skin extract > 20-fold higher dosages of SAAP-148 were required to achieve a 2-log reduction (LR) of MRSA versus SAAP-148 in PBS. Exposure of ex vivo models to SAAP-148 for 24 h resulted in a 4-fold lower LR than a 1 h or 4 h exposure period. Additionally, SAAP-148 caused a 1.3-fold lower mean LR at a load of 107 CFU compared to 105 CFU MRSA. Moreover, exposure of ex vivo excision wound models to SAAP-148 resulted in a 1.5-fold lower LR than for tape-stripped skin. Finally, SAAP-148 failed to reduce the bacterial counts in an adapted rat study. CONCLUSIONS Several factors, such as absorption of SAAP-148 by wound dressings, components within wound exudates, re-colonisation during the exposure of SAAP-148, and a high bacterial load may contribute to the poor antimicrobial effect of SAAP-148 against MRSA in the rat model.
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Affiliation(s)
- Gabrielle S. Dijksteel
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ Beverwijk, The Netherlands
- Dept. of Plastic Reconstructive & Hand Surgery, Amsterdam University Medical Centres, Free University of Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Magda M. W. Ulrich
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ Beverwijk, The Netherlands
- Dept. of Plastic Reconstructive & Hand Surgery, Amsterdam University Medical Centres, Free University of Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Marcel Vlig
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ Beverwijk, The Netherlands
| | - Peter H. Nibbering
- Dept. of Infectious Diseases, Leiden University Medical Centre, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Robert A. Cordfunke
- Dept. of Immunohematology and Blood Transfusion, Leiden University Medical Centre, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Jan W. Drijfhout
- Dept. of Immunohematology and Blood Transfusion, Leiden University Medical Centre, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Esther Middelkoop
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ Beverwijk, The Netherlands
- Dept. of Plastic Reconstructive & Hand Surgery, Amsterdam University Medical Centres, Free University of Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
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208
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Jang M, Kim J, Choi Y, Bang J, Kim Y. Antiseptic Effect of Ps-K18: Mechanism of Its Antibacterial and Anti-Inflammatory Activities. Int J Mol Sci 2019; 20:E4895. [PMID: 31581682 PMCID: PMC6801626 DOI: 10.3390/ijms20194895] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/29/2019] [Accepted: 09/30/2019] [Indexed: 12/16/2022] Open
Abstract
Recently, bioactive peptides have attracted attention for their therapeutic applications in the pharmaceutical industry. Among them, antimicrobial peptides are candidates for new antibiotic drugs. Since pseudin-2 (Ps), isolated from the skin of the paradoxical frog Pseudis paradoxa, shows broad-spectrum antibacterial activity with high cytotoxicity, we previously designed Ps-K18 with a Lys substitution for Leu18 in Ps, which showed high antibacterial activity and low toxicity. Here, we examined the potency of Ps-K18, aiming to develop antibiotics derived from bioactive peptides for the treatment of Gram-negative sepsis. We first investigated the antibacterial mechanism of Ps-K18 based on confocal micrographs and field emission scanning electron microscopy, confirming that Ps-K18 targets the bacterial membrane. Anti-inflammatory mechanism of Ps-K18 was investigated by secreted alkaline phosphatase reporter gene assays and RT-PCR, which revealed that Ps-K18 activates innate defense via Toll-like receptor 4-mediated nuclear factor-kappa B signaling pathways. Moreover, we investigated the antiseptic effect of Ps-K18 using a lipopolysaccharide or Escherichia coli K1-induced septic shock mouse model. Ps-K18 significantly reduced bacterial growth and inflammatory responses in the septic shock model. Ps-K18 showed low renal and liver toxicity and attenuated lung damage effectively. This study suggests that Ps-K18 is a potent peptide antibiotic that could be applied therapeutically to Gram-negative sepsis.
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Affiliation(s)
- Mihee Jang
- Department of Bioscience and Biotechnology, Research Institute for Bioactive-Metabolome Network, Konkuk University, Seoul 05029, Korea.
| | - Jieun Kim
- Department of Bioscience and Biotechnology, Research Institute for Bioactive-Metabolome Network, Konkuk University, Seoul 05029, Korea.
| | - Yujin Choi
- Chuncheon Center, Korea Basic Science Institute, Chuncheon 24341, Korea.
| | - JeongKyu Bang
- Protein Structure Group, Korea Basic Science Institute, Ochang, Cheongju, Chung-Buk 28199, Korea.
| | - Yangmee Kim
- Department of Bioscience and Biotechnology, Research Institute for Bioactive-Metabolome Network, Konkuk University, Seoul 05029, Korea.
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209
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Cloning and identification of antimicrobial peptide, hepcidin from freshwater carp, Catla catla on pathogen challenge and PAMPs stimulation. 3 Biotech 2019; 9:341. [PMID: 31497459 DOI: 10.1007/s13205-019-1874-6] [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: 02/27/2019] [Accepted: 08/13/2019] [Indexed: 12/19/2022] Open
Abstract
Hepcidin, a cationic cysteine-rich antimicrobial peptide (AMP) acts in hormone regulation and iron homeostasis in the host body. However, the biological property of hepcidin in immune reaction remains unexplored. In aquatic milieu, environmental and pathogenic stressors cause detrimental infections, which are defended by various immunological cells and antimicrobial peptides. In this study, hepcidin gene has been cloned from freshwater carp, Catla catla. The partially cloned hepcidin consists of 200 bp nucleotide sequence encoding 66 amino acids. Nucleotide sequence showed 97% and 91% similarity with Labeo rohita and Cyprinus carpio, respectively. Expression profile revealed significant up-regulation (P ≤ 0.0001) in liver as compared to other tissues in different conditions. In Aeromonas hydrophila challenged C. catla, liver showed higher expression level of hepcidin at 72 h as compared to other tissues. In skin, hepcidin expression showed significant upraise during 24 h in Streptococcus uberis infection. In Argulus sp. infected fishes, up-regulation of hepcidin expression was noted in liver, intestine and skin. The inactivated viral antigen-stimulated fishes, a substantial rise in liver was observed implying hepcidin as an important molecule in combating the pathogenic infections in freshwater carp, C. catla. Fishes stimulated with pathogen-associated molecular patterns (PAMPs) triggered the increased expression of hepcidin mRNA in liver, kidney and skin. This study indicates the presence of hepcidin as antimicrobial peptide in neutralizing the pathogenic infection in fishes.
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210
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Chiaramonte M, Inguglia L, Vazzana M, Deidun A, Arizza V. Stress and immune response to bacterial LPS in the sea urchin Paracentrotus lividus (Lamarck, 1816). FISH & SHELLFISH IMMUNOLOGY 2019; 92:384-394. [PMID: 31220574 DOI: 10.1016/j.fsi.2019.06.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
The immune system of the sea urchin species Paracentrotus lividus is highly complex and, as yet, poorly understood. P. lividus coelomocytes mediate immune response through phagocytosis and encapsulation of non-self particles, in addition to the production of antimicrobial molecules. Despite this understanding, details of exactly how these processes occur and the mechanisms which drive them are still in need of clarification. In this study, we show how the bacterial lipopolysaccharides (LPS) is able to induce a stress response which increases the levels of the heat shock proteins HSP70 and HSP90 only a few hours after treatment. This study also shows that LPS treatment increases the expression of the β-thymosin-derivated protein paracentrin, the precursor of antimicrobial peptides.
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Affiliation(s)
- Marco Chiaramonte
- Dept. STEBICEF, Università Degli Studi di Palermo, Via Archirafi, 18, 90123, Palermo, Italy
| | - Luigi Inguglia
- Dept. STEBICEF, Università Degli Studi di Palermo, Via Archirafi, 18, 90123, Palermo, Italy.
| | - Mirella Vazzana
- Dept. STEBICEF, Università Degli Studi di Palermo, Via Archirafi, 18, 90123, Palermo, Italy
| | - Alan Deidun
- Dept. of Geosciences, University of Malta, Msida, MSD, 2080, Malta
| | - Vincenzo Arizza
- Dept. STEBICEF, Università Degli Studi di Palermo, Via Archirafi, 18, 90123, Palermo, Italy
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Negahdaripour M, Owji H, Eslami M, Zamani M, Vakili B, Sabetian S, Nezafat N, Ghasemi Y. Selected application of peptide molecules as pharmaceutical agents and in cosmeceuticals. Expert Opin Biol Ther 2019; 19:1275-1287. [PMID: 31382850 DOI: 10.1080/14712598.2019.1652592] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Introduction: Peptide molecules are being vastly investigated as an emerging class of therapeutic molecules in recent years. Currently, 60 peptides have been approved by the US Food and Drug Administration (FDA), and more would enter the market in near future. Peptides have already opened their ways into cosmeceutical and food industries as well.Areas covered: Antibodies, vaccines, and antimicrobial agents are the major classes of therapeutic peptides. Additionally, peptides may be employed in drug development to support cell penetration or targeting. The interest in antimicrobial peptides is surging due to the increasing risk of antibiotic-resistant pathogens. Peptide vaccines with their significant advantages compared with traditional vaccines, are expected to find their place in coming years, especially for cancer, microbial and allergen-specific immunotherapy. The usage of peptides in cosmeceuticals is also growing rapidly.Expert opinion: Peptide synthesis has become accessible, and advances in peptide engineering, sequencing technologies, and structural bioinformatics have resulted in the rational designing of novel peptides. All these advancements would lead to the more prominent roles of peptides in the mentioned areas. In this review, we discuss applications of peptides in different fields including pharmaceuticals, cosmeceuticals, besides the critical factors in designing efficient peptide molecules.
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Affiliation(s)
- Manica Negahdaripour
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.,Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Hajar Owji
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Mahboobeh Eslami
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Mozhdeh Zamani
- Colorectal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Bahareh Vakili
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran.,Department of Medical Biotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Soudabeh Sabetian
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Navid Nezafat
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.,Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Younes Ghasemi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.,Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran
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212
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Pharmacological effects of ginseng on infectious diseases. Inflammopharmacology 2019; 27:871-883. [PMID: 31407196 DOI: 10.1007/s10787-019-00630-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 08/03/2019] [Indexed: 12/11/2022]
Abstract
Ginseng has been traditionally used as an herbal nutritional supplement in Asian countries, including Korea, China, Japan, and Vietnam for several millennia. Most studies have focused on the role of ginseng on anti-oxidative stress, anti-inflammatory, and anti-cancer activities. Recently, modulator activities of ginseng on the immune responses during pathogenic bacterial and viral infections and beneficial effects of ginseng in infectious diseases have been elucidated. In vivo and in vitro studies revealed the potential of ginseng extracts and ginsenosides Rg1, Rg3, Rb1, Rb2, Rb3, compound K, Re, Rd, Rh2 for treatment of several infectious diseases. The molecular mechanisms of these effects mainly involve inflammatory cytokines (TNF-α, IL-6, IL-1β, IFN-γ, IL-10), apoptotic pathway (bcl-2, bcl-xL), PI3K/Akt pathway, MAPKs pathway, JAK2/STAT5, NF-κB pathway, and the inflammasome. In this review, we will summarize the current knowledge on the effects of ginseng in the immune responses during the infections and its bioactivities on the prevention of infectious diseases as well as its underlying mechanisms. Moreover, the therapeutic potential of ginseng as an anti-bacterial and anti-viral medication and vaccine adjuvant will be discussed as well.
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213
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Pizzolato-Cezar LR, Okuda-Shinagawa NM, Machini MT. Combinatory Therapy Antimicrobial Peptide-Antibiotic to Minimize the Ongoing Rise of Resistance. Front Microbiol 2019; 10:1703. [PMID: 31447797 PMCID: PMC6695574 DOI: 10.3389/fmicb.2019.01703] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 07/10/2019] [Indexed: 12/20/2022] Open
Affiliation(s)
- Luis R Pizzolato-Cezar
- Peptide Chemistry Laboratory, Department of Biochemistry, University of São Paulo, São Paulo, Brazil
| | - Nancy M Okuda-Shinagawa
- Peptide Chemistry Laboratory, Department of Biochemistry, University of São Paulo, São Paulo, Brazil
| | - M Teresa Machini
- Peptide Chemistry Laboratory, Department of Biochemistry, University of São Paulo, São Paulo, Brazil
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214
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Jain N, Mansuri A. Stopping the Unstoppable: Unconventional Methods to Prevent the Biofilm Growth. Curr Drug Discov Technol 2019; 17:515-522. [PMID: 31362660 DOI: 10.2174/1570163816666190726153441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/11/2019] [Accepted: 06/03/2019] [Indexed: 12/18/2022]
Abstract
Biofilms are consortia of microorganisms encased in extracellular matrix that protect cells from adverse conditions. A biofilm matrix is typically composed of extracellular DNA, cellulose and proteinaceous amyloid fibers. The matrix aids in adhesion to abiotic and biotic surface including medical devices and host tissues. The presence of biofilm makes bacteria more resilient and non-responsive to most current treatment regimes at disposal. Therefore, biofilm-associated infections are serious threat in hospital settings and pose a huge burden on economy. Inhibition of matrix components (cellulose and/or amyloid formation) has emerged as a lucrative alternative strategy to cure biofilm-related infections and combat antibiotic resistance. Here we review the current and emerging therapeutic interventions to mitigate persistent infections due to biofilms. The successful implementation of these interventions will have a huge impact on alleviating the current financial burden on healthcare services.
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Affiliation(s)
- Neha Jain
- Department of Bioscience and Bioengineering, Indian Institute of Technology (IIT) Jodhpur, NH 65, Nagaur Road, Karwar, Jodhpur (Rajasthan), India
| | - Abdulkhalik Mansuri
- Department of Bioscience and Bioengineering, Indian Institute of Technology (IIT) Jodhpur, NH 65, Nagaur Road, Karwar, Jodhpur (Rajasthan), India
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215
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Fili S, Valmas A, Spiliopoulou M, Kontou P, Fitch A, Beckers D, Degen T, Barlos K, Barlos KK, Karavassili F, Margiolaki I. Revisiting the structure of a synthetic somatostatin analogue for peptide drug design. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS 2019; 75:611-620. [DOI: 10.1107/s2052520619006012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/30/2019] [Indexed: 11/10/2022]
Abstract
Natural or artificially manufactured peptides attract scientific interest worldwide owing to their wide array of pharmaceutical and biological activities. X-ray structural studies are used to provide a precise extraction of information, which can be used to enable a better understanding of the function and physicochemical characteristics of peptides. Although it is vulnerable to disassociation, one of the most vital human peptide hormones, somatostatin, plays a regulatory role in the endocrine system as well as in the release of numerous secondary hormones. This study reports the successful crystallization and complete structural model of octreotide, a stable octapeptide analogue of somatostatin. Common obstacles in crystallographic studies arising from the intrinsic difficulties of obtaining a suitable single-crystal specimen were efficiently overcome as polycrystalline material was employed for synchrotron and laboratory X-ray powder diffraction (XPD) measurements. Data collection and preliminary analysis led to the identification of unit-cell symmetry [orthorhombic, P212121, a = 18.5453 (15), b = 30.1766 (25), c = 39.798 (4) Å], a process which was later followed by complete structure characterization and refinement, underlying the efficacy of the suggested (XPD) approach.
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216
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Buommino E, Carotenuto A, Antignano I, Bellavita R, Casciaro B, Loffredo MR, Merlino F, Novellino E, Mangoni ML, Nocera FP, Brancaccio D, Punzi P, Roversi D, Ingenito R, Bianchi E, Grieco P. The Outcomes of Decorated Prolines in the Discovery of Antimicrobial Peptides from Temporin-L. ChemMedChem 2019; 14:1283-1290. [PMID: 31087626 DOI: 10.1002/cmdc.201900221] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/12/2019] [Indexed: 01/17/2023]
Abstract
Previously, we identified a potent antimicrobial analogue of temporin L (TL), [Pro3 ]TL, in which glutamine at position 3 was substituted with proline. In this study, a series of analogues in which position 3 is substituted with non-natural proline derivatives, was investigated for correlations between the conformational properties of the compounds and their antibacterial, cytotoxic, and hemolytic activities. Non-natural proline analogues with substituents at position 4 of the pyrrolidine ring were considered. Structure-activity relationship (SAR) studies of these analogues were performed by means of antimicrobial and cytotoxicity assays along with circular dichroism (CD) and NMR spectroscopic analyses for selected compounds. The most promising peptides were additionally evaluated for their activity against some representative veterinary microbial strains to compare with those from human strains. We identified novel analogues with interesting properties that make them attractive lead compounds.
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Affiliation(s)
- Elisabetta Buommino
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy
| | - Alfonso Carotenuto
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy
| | - Ignazio Antignano
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy
| | - Rosa Bellavita
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy
| | - Bruno Casciaro
- Department of Biochemical Sciences, Laboratory affiliated to Pasteur Institute Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, 00185, Italy.,Center for Life Nano Science, Istituto Italiano di Tecnologia, Rome, 00161, Italy
| | - Maria Rosa Loffredo
- Department of Biochemical Sciences, Laboratory affiliated to Pasteur Institute Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, 00185, Italy
| | - Francesco Merlino
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy
| | - Ettore Novellino
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy
| | - Maria Luisa Mangoni
- Department of Biochemical Sciences, Laboratory affiliated to Pasteur Institute Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, 00185, Italy
| | - Francesca Paola Nocera
- Department of Veterinary Medicine and Animal Production, University of Naples "Federico II", Naples, 80137, Italy
| | - Diego Brancaccio
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy
| | - Pasqualina Punzi
- Peptide Chemistry Unit, IRBM S.p.A., via Pontina km 30 600, Pomezia, 00071, Italy
| | - Daniela Roversi
- Peptide Chemistry Unit, IRBM S.p.A., via Pontina km 30 600, Pomezia, 00071, Italy
| | - Raffaele Ingenito
- Peptide Chemistry Unit, IRBM S.p.A., via Pontina km 30 600, Pomezia, 00071, Italy
| | - Elisabetta Bianchi
- Peptide Chemistry Unit, IRBM S.p.A., via Pontina km 30 600, Pomezia, 00071, Italy
| | - Paolo Grieco
- Department of Pharmacy, University of Naples "Federico II", Naples, 80131, Italy.,Centro Interuniversitario di Ricerca sui Peptidi Bioattivi (CIRPEB), University of Naples "Federico II", Naples, 80134, Italy
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217
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Lee PC, Chu CC, Tsai YJ, Chuang YC, Lung FD. Design, synthesis, and antimicrobial activities of novel functional peptides against Gram-positive and Gram-negative bacteria. Chem Biol Drug Des 2019; 94:1537-1544. [PMID: 31059203 DOI: 10.1111/cbdd.13535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/08/2019] [Accepted: 04/18/2019] [Indexed: 12/29/2022]
Abstract
The extensive use of antibiotics in medicine results in the multidrug resistance of bacteria, making the development of new antimicrobial agents an urgent need. Antimicrobial peptides (AMPs) are considered as a new class of antibiotic with characteristics including an ability to kill target cells rapidly and a broad spectrum of activity. We have developed a potent antimicrobial peptide MAP-0403 (MIC = 5 μM), but it exhibited a high hemolytic side-effect (70.7%). To reduce its hemolytic effect and increase antimicrobial activity, three peptides derivatives of MAP-0403 (J-1, J-2, and J-3) were designed, synthesized by solid phase synthesis, purified by RP-HPLC, and characterized by MALDI-TOF MS. Structure-activity relationships of these peptides were studied by using circular dichroism and antimicrobial assays. The percentage of helical structure in J-1, J-2, and J-3 was lower than that of MAP-0403. The antimicrobial activity of J-1 was the same as that of MAP-0403 (MIC = 5 μM), J-2 exhibited the highest activity (MIC = 2.5 μM), while J-3 showed decreased activity (MIC = 10 μM). Compared to MAP-0403, J-2 showed significantly reduced hemolytic effect (3.4%), while J-1 and J-3 showed slightly decreased hemolytic effect (46.2%, 55.6%, respectively). Peptide J-2 was discovered as a novel and potent antimicrobial agents.
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Affiliation(s)
- Ping-Chien Lee
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Chia-Chun Chu
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Yi-Je Tsai
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Ya-Chu Chuang
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Feng-Di Lung
- Department of Chemistry, Tunghai University, Taichung, Taiwan
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218
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Yang L, Luo M, He J, Zuo H, Weng S, He J, Xu X. A JAK-STAT pathway target gene encoding a single WAP domain (SWD)-containing protein from Litopenaeus vannamei. FISH & SHELLFISH IMMUNOLOGY 2019; 89:555-563. [PMID: 30999041 DOI: 10.1016/j.fsi.2019.04.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 04/11/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
In shrimp, the JAK-STAT pathway is essentially implicated in both antiviral and antibacterial responses. However, few regulatory target genes of the JAK-STAT pathway in shrimp have been reported so far. In this study, a novel single WAP domain-containing peptide (LvSWD4) was identified from Pacific white shrimp Litopenaeus vannamei. The promoter of LvSWD4 was predicted to harbor multiple STAT-binding DNA motifs. Over-expression of the JAK-STAT pathway components STAT, JAK and Domeless in vitro significantly enhanced the transcriptional activity of the LvSWD4 promoter, and in vivo silencing of STAT and the the JAK-STAT pathway upstream regulator IRF down-regulated the expression of LvSWD4, suggesting that LvSWD4 could be a target gene of the JAK-STAT pathway. The expression of LvSWD4 was significantly increased after infection with Gram-negative and positive bacteria, fungi and virus, and silencing of LvSWD4 increased the susceptibility of shrimp to V. parahaemolyticus and WSSV infections. In vitro experiments also demonstrated that the recombinant LvSWD4 protein had significant inhibitory activities against Gram negative bacteria V. parahaemolyticus and E. coli and Gram positive bacteria S. aureus and B. subtilis. Furthermore, silencing of LvSWD4 in vivo significantly affected expression of various immune functional genes and attenuated the phagocytic activity of hemocytes. These suggested that as a target gene of STAT, LvSWD4 was essentially implicated in shrimp immunity, which could constitute part of the mechanism underlying the immune function of the shrimp JAK-STAT pathway.
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Affiliation(s)
- Linwei Yang
- MOE Key Laboratory of Aquatic Product Safety, State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, PR China
| | - Mengting Luo
- MOE Key Laboratory of Aquatic Product Safety, State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, PR China
| | - Jianhui He
- MOE Key Laboratory of Aquatic Product Safety, State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, PR China
| | - Hongliang Zuo
- MOE Key Laboratory of Aquatic Product Safety, State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, PR China
| | - Shaoping Weng
- MOE Key Laboratory of Aquatic Product Safety, State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, PR China
| | - Jianguo He
- MOE Key Laboratory of Aquatic Product Safety, State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, PR China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Guangzhou, PR China
| | - Xiaopeng Xu
- MOE Key Laboratory of Aquatic Product Safety, State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, PR China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Guangzhou, PR China.
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219
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Huang YW, Lee CT, Wang TC, Kao YC, Yang CH, Lin YM, Huang KS. The Development of Peptide-based Antimicrobial Agents against Dengue Virus. Curr Protein Pept Sci 2019; 19:998-1010. [PMID: 29852867 PMCID: PMC6446661 DOI: 10.2174/1389203719666180531122724] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/20/2018] [Accepted: 05/25/2018] [Indexed: 11/22/2022]
Abstract
Dengue fever has become an imminent threat to international public health because of global warming and climate change. The World Health Organization proclaimed that more than 50% of the world’s population is at risk of dengue virus (DENV) infection. Therefore, developing a clinically ap-proved vaccine and effective therapeutic remedy for treating dengue fever is imperative. Peptide drug de-velopment has become a novel pharmaceutical research field. This article reviews various peptides-based antimicrobial agents targeting three pathways involved in the DENV lifecycle. Specifically, they are peptide vaccines from immunomodulation, peptide drugs that inhibit virus entry, and peptide drugs that interfere with viral replication. Many antiviral peptide studies against DENV have been conducted in animal model trials, and progression to clinical trials for these promising peptide drugs is anticipated.
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Affiliation(s)
- Yen-Wei Huang
- The School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung, Taiwan.,Department of Chinese Medicine, E-DA Hospital, Kaohsiung, Taiwan
| | - Chun-Ting Lee
- The School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung, Taiwan.,Department of Chinese Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ta-Chen Wang
- The School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung, Taiwan.,Department of Chinese Medicine, E-DA Hospital, Kaohsiung, Taiwan
| | - Yun-Chung Kao
- The School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung, Taiwan.,Department of Chinese Medicine, Kuanshan Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taitung, Taiwan
| | - Chih-Hui Yang
- Department of Biological Science and Technology, I-Shou University, Kaohsiung, Taiwan
| | - Yu-Mei Lin
- The School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung, Taiwan
| | - Keng-Shiang Huang
- The School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung, Taiwan
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220
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Mandal SM, Manna S, Mondal S, Ghosh AK, Chakraborty R. Transcriptional regulation of human defense peptides: a new direction in infection control. Biol Chem 2019; 399:1277-1284. [PMID: 30044754 DOI: 10.1515/hsz-2018-0182] [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: 03/13/2018] [Accepted: 07/03/2018] [Indexed: 11/15/2022]
Abstract
While antibiotics remain as a major therapy against life threatening pathogenic infections, they often lead to side effects like rashes, gastrointestinal and central nervous system reactions to serious allergies or organ damage. These adverse effects alongside the emergence of multi-antibiotic resistant bacteria and the decline in the development of new antibiotics, have posed a serious impediment for effective antibiotic therapy. A paradigm shift in attitudes has led us to think about the possibility of controlling infections with the indigenous antimicrobial peptides synthesized by human beings. It has been observed that few transcription factors can stimulate more than three dozen defense peptides in the human system. Hence, during the infection stage, if we can induce these common factors, most of the infections could be healed from inside without the administration of any antibiotics. The efficiency of such peptides is being proven in clinical tests leading to the development of drugs.
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Affiliation(s)
- Santi M Mandal
- Central Research Facility, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Sounik Manna
- OMICS Laboratory, Department of Biotechnology, University of North Bengal, Siliguri 734 013, WB, India
| | - Sneha Mondal
- Central Research Facility, Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Ananta K Ghosh
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Ranadhir Chakraborty
- OMICS Laboratory, Department of Biotechnology, University of North Bengal, Darjeeling, West Bengal, India
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221
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Alyousef AA, Mateen A, Al-Akeel R, Alqasim A, Al-Sheikh Y, Alqahtani MS, Syed R. Screening & analysis of anionic peptides from Foeniculum vulgare Mill by mass spectroscopy. Saudi J Biol Sci 2019; 26:660-664. [PMID: 31048989 PMCID: PMC6486522 DOI: 10.1016/j.sjbs.2018.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 11/29/2018] [Accepted: 12/03/2018] [Indexed: 02/02/2023] Open
Abstract
Fennel (Foeniculum vulgare Mill.) member from the family Umbelliferae (Apiaceae) and has been used in Saudi Arabia as an medicine as of the from the tradition. Our previous work with seed extracts of this plant generated DEAE-ion exchange purified proteins that exhibited antibacterial properties. The current study moves this work forward by using 2-D gel separation and MALDI TOF/TOF to identify proteins in this active extract. Fourteen protein spots were excised, digested, and identified. Several putative functions were identified, including: a copper-trans locating ATPase PAA1 chloroplastic-like isoform X1; a cytosolic enolase; a putative pentatricopeptide repeat-containing protein; an NADP-requiring isocitrate dehydrogenase; two proteins annotated as being encoded downstream from Son-like proteins; three probable nuclear proteins 5–1; and four predicted/ unidentified proteins. Future efforts will further characterize their relevant antimicrobial properties with the aim of cloning and high throughput synthesis of the antimicrobial element(s).
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Affiliation(s)
- Abdullah A Alyousef
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ayesha Mateen
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Raid Al-Akeel
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abdulaziz Alqasim
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Yazeed Al-Sheikh
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammed S Alqahtani
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Rabbani Syed
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia.,Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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222
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Computational characterization of deleterious SNPs in Toll-like receptor gene that potentially cause mastitis in dairy cattle. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101151] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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223
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Alkanfari I, Freeman KB, Roy S, Jahan T, Scott RW, Ali H. Small-Molecule Host-Defense Peptide Mimetic Antibacterial and Antifungal Agents Activate Human and Mouse Mast Cells via Mas-Related GPCRs. Cells 2019; 8:cells8040311. [PMID: 30987258 PMCID: PMC6523814 DOI: 10.3390/cells8040311] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 03/29/2019] [Accepted: 03/29/2019] [Indexed: 12/18/2022] Open
Abstract
Host-defense peptides (HDPs) have an important therapeutic potential against microbial infections but their metabolic instability and cellular cytotoxicity have limited their utility. To overcome these limitations, we utilized five small-molecule, nonpeptide HDP mimetics (smHDPMs) and tested their effects on cytotoxicity, antimicrobial activity, and mast cell (MC) degranulation. None of the smHDPMs displayed cytotoxicity against mouse 3T3 fibroblasts or human transformed liver HepG2 cells. However, one compound had both antifungal and antibacterial activity. Surprisingly, all five compounds induced degranulation in a human MC line, LAD2, and this response was substantially reduced in Mas-related G protein-coupled receptor (GPCR)-X2 (MRGPRX2)-silenced cells. Furthermore, all five compounds induced degranulation in RBL-2H3 cells expressing MRGPRX2 but this response was abolished in cells expressing naturally occurring loss-of-function missense variants G165E (rs141744602) and D184H (rs372988289). Mrgprb2 is the likely mouse ortholog of human MRGPRX2, which is expressed in connective tissue MCs (CTMCs) such as cutaneous and peritoneal MCs (PMCs). All five smHDPMs induced degranulation in wild-type PMCs but not in cells derived from Mrgprb2−/− mice. These findings suggest that smHDPMs could serve as novel targets for the treatment of drug-resistant fungal and bacterial infections because of their ability to harness CTMCs’ host defense functions.
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Affiliation(s)
- Ibrahim Alkanfari
- Department of Pathology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA.
| | - Katie B Freeman
- Fox Chase Chemical Diversity Center, Doylestown, PA 18902, USA.
| | - Saptarshi Roy
- Department of Pathology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA.
| | - Tahsin Jahan
- Department of Pathology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA.
| | - Richard W Scott
- Fox Chase Chemical Diversity Center, Doylestown, PA 18902, USA.
| | - Hydar Ali
- Department of Pathology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA.
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224
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Toda H, Shi M, Williams JA, Sehgal A. Genetic Mechanisms Underlying Sleep. COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 2019; 83:57-61. [PMID: 30936393 DOI: 10.1101/sqb.2018.83.037705] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Sleep is important for cognitive ability, and perturbations of sleep are associated with a myriad of brain disorders. However, how sleep promotes health and function during wake is poorly understood. To address the cellular and molecular mechanisms underlying sleep, we use the fruit fly Drosophila melanogaster as a genetic model. Forward genetic approaches in flies were critical for deciphering molecular mechanisms of the circadian clock. Using similar approaches, we and others are gaining insights into the pathways that control sleep amount.
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Affiliation(s)
- Hirofumi Toda
- Howard Hughes Medical Institute, Perelman School of Medicine University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Mi Shi
- Howard Hughes Medical Institute, Perelman School of Medicine University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Julie A Williams
- Howard Hughes Medical Institute, Perelman School of Medicine University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Amita Sehgal
- Howard Hughes Medical Institute, Perelman School of Medicine University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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225
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Papagianis PC, Pillow JJ, Moss TJ. Bronchopulmonary dysplasia: Pathophysiology and potential anti-inflammatory therapies. Paediatr Respir Rev 2019; 30:34-41. [PMID: 30201135 DOI: 10.1016/j.prrv.2018.07.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 07/17/2018] [Indexed: 12/26/2022]
Abstract
Inflammation of the preterm lungs is key to the pathogenesis of bronchopulmonary dysplasia (BPD), whether it arises as a consequence of intrauterine inflammation or postnatal respiratory management. This review explores steroidal and non-steroidal therapies for reducing neonatal pulmonary inflammation, aimed at treating or preventing BPD.
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Affiliation(s)
- Paris C Papagianis
- The Ritchie Centre, Hudson Institute of Medical Research, Department of Obstetrics and Gynecology, Monash University, Clayton, VIC 3168, Australia; Human Sciences and Centre for Neonatal Research and Education, The University of Western Australia, Crawley, WA, Australia.
| | - J J Pillow
- Human Sciences and Centre for Neonatal Research and Education, The University of Western Australia, Crawley, WA, Australia.
| | - Timothy J Moss
- The Ritchie Centre, Hudson Institute of Medical Research, Department of Obstetrics and Gynecology, Monash University, Clayton, VIC 3168, Australia.
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226
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Durand GA, Raoult D, Dubourg G. Antibiotic discovery: history, methods and perspectives. Int J Antimicrob Agents 2019; 53:371-382. [DOI: 10.1016/j.ijantimicag.2018.11.010] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 11/12/2018] [Accepted: 11/17/2018] [Indexed: 02/08/2023]
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227
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Cheng HY, Ning MX, Chen DK, Ma WT. Interactions Between the Gut Microbiota and the Host Innate Immune Response Against Pathogens. Front Immunol 2019; 10:607. [PMID: 30984184 PMCID: PMC6449424 DOI: 10.3389/fimmu.2019.00607] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/07/2019] [Indexed: 12/12/2022] Open
Abstract
The mammalian intestine is colonized by over a trillion microbes that comprise the "gut microbiota," a microbial community which has co-evolved with the host to form a mutually beneficial relationship. Accumulating evidence indicates that the gut microbiota participates in immune system maturation and also plays a central role in host defense against pathogens. Here we review some of the mechanisms employed by the gut microbiota to boost the innate immune response against pathogens present on epithelial mucosal surfaces. Antimicrobial peptide secretion, inflammasome activation and induction of host IL-22, IL-17, and IL-10 production are the most commonly observed strategies employed by the gut microbiota for host anti-pathogen defense. Taken together, the body of evidence suggests that the host gut microbiota can elicit innate immunity against pathogens.
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Affiliation(s)
- Hong-Yu Cheng
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, China
| | - Meng-Xia Ning
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, China
| | - De-Kun Chen
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, China
| | - Wen-Tao Ma
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, China
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228
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Ebersole JL, Peyyala R, Gonzalez OA. Biofilm-induced profiles of immune response gene expression by oral epithelial cells. Mol Oral Microbiol 2019; 34. [PMID: 30407731 DOI: 10.1111/omi.12251] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/01/2018] [Indexed: 12/12/2022]
Abstract
This study examined the oral epithelial immunotranscriptome response patterns modulated by oral bacterial planktonic or biofilm challenge. We assessed gene expression patterns when epithelial cells were challenged with a multispecies biofilm composed of Streptococcus gordonii, Fusobacterium nucleatum, and Porphyromonas gingivalis representing a type of periodontopathic biofilm compared to challenge with the same species of planktonic bacteria. Of the 579 human immunology genes, a substantial signal of the epithelial cells was observed to 181 genes. Biofilm challenged stimulated significant elevations compared to planktonic bacteria for IL32, IL8, CD44, B2M, TGFBI, NFKBIA, IL1B, CD59, IL1A, CCL20 representing the top 10 signals comprising 55% of the overall signal for the epithelial cell responses. Levels of PLAU, CD9, IFITM1, PLAUR, CD24, TNFSF10, and IL1RN were all elevated by each of the planktonic bacterial challenge vs the biofilm responses. While the biofilms up-regulated 123/579 genes (>2-fold), fewer genes were increased by the planktonic species (36 [S gordonii], 30 [F nucleatum], 44 [P gingivalis]). A wide array of immune genes were regulated by oral bacterial challenge of epithelial cells that would be linked to the local activity of innate and adaptive immune response components in the gingival tissues. Incorporating bacterial species into a structured biofilm dramatically altered the number and level of genes expressed. Additionally, a specific set of genes were significantly decreased with the multispecies biofilms suggesting that some epithelial cell biologic pathways are down-regulated when in contact with this type of pathogenic biofilm.
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Affiliation(s)
- Jeffrey L Ebersole
- Department of Biomedical Sciences, School of Dental Medicine, University of Nevada Las Vegas, Las Vegas, Nevada.,College of Dentistry, Center for Oral Health Research, University of Kentucky, Lexington, Kentucky
| | - Rebecca Peyyala
- College of Dentistry, Center for Oral Health Research, University of Kentucky, Lexington, Kentucky
| | - Octavio A Gonzalez
- College of Dentistry, Center for Oral Health Research, University of Kentucky, Lexington, Kentucky.,Division of Periodontology, College of Dentistry, University of Kentucky, Lexington, Kentucky
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229
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Immune modulation of liver sinusoidal endothelial cells by melittin nanoparticles suppresses liver metastasis. Nat Commun 2019; 10:574. [PMID: 30718511 PMCID: PMC6361944 DOI: 10.1038/s41467-019-08538-x] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 12/30/2018] [Accepted: 01/17/2019] [Indexed: 12/15/2022] Open
Abstract
Liver sinusoidal endothelial cells (LSECs) are responsible for the immunologic tolerance of liver which is a common site for visceral metastases, suggesting its potential role as an target for cancer immunotherapy. However, targeted modulation of LSECs is still not achieved thus far. Here, we report LSECs are specifically targeted and modulated by melittin nanoparticles (α-melittin-NPs). Intravital imaging shows that LSECs fluoresce within 20 s after intravenous injection of α-melittin-NPs. α-melittin-NPs trigger the activation of LSECs and lead to dramatic changes of cytokine/chemokine milieu in the liver, which switches the hepatic immunologic environment to the activated state. As a result, α-melittin-NPs resist the formation of metastatic lesions with high efficiency. More strikingly, the survival rate reaches 80% in the spontaneous liver metastatic tumor model. Our research provides support for the use of α-melittin-NPs to break LSEC-mediated immunologic tolerance, which opens an avenue to control liver metastasis through the immunomodulation of LSECs. Liver sinusoidal endothelial cells are known to promote immune tolerance in liver. Here, the authors target these cells using melittin nanoparticles and show alterations in the liver immune environment and suppression of liver metastases.
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230
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Penkauskas T, Preta G. Biological applications of tethered bilayer lipid membranes. Biochimie 2019; 157:131-141. [DOI: 10.1016/j.biochi.2018.11.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/19/2018] [Indexed: 12/16/2022]
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231
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Perez CE, Crawford JM. Characterization of a Hybrid Nonribosomal Peptide–Carbohydrate Biosynthetic Pathway in Photorhabdus luminescens. Biochemistry 2019; 58:1131-1140. [DOI: 10.1021/acs.biochem.8b01120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Corey E. Perez
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Chemical Biology Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Jason M. Crawford
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Chemical Biology Institute, Yale University, West Haven, Connecticut 06516, United States
- Department of Microbial Pathogenesis, Yale School of Medicine, New Haven, Connecticut 06536, United States
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232
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Roy S, Ganguly A, Haque M, Ali H. Angiogenic Host Defense Peptide AG-30/5C and Bradykinin B 2 Receptor Antagonist Icatibant Are G Protein Biased Agonists for MRGPRX2 in Mast Cells. THE JOURNAL OF IMMUNOLOGY 2019; 202:1229-1238. [PMID: 30651343 DOI: 10.4049/jimmunol.1801227] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 12/12/2018] [Indexed: 01/21/2023]
Abstract
AG-30/5C is an angiogenic host defense peptide that activates human mast cells (MC) via an unknown mechanism. Using short hairpin RNA-silenced human MC line LAD2 and stably transfected RBL-2H3 cells, we demonstrate that AG-30/5C induces MC degranulation via Mas-related G protein-coupled receptor X2 (MRGPRX2). Most G protein-coupled receptors signal via parallel and independent pathways mediated by G proteins and β-arrestins. AG-30/5C and compound 48/80 induced similar maximal MC degranulation via MRGPRX2, which was abolished by pertussis toxin. However, compound 48/80 induced a robust β-arrestin activation as determined by transcriptional activation following arrestin translocation (Tango), but AG-30/5C did not. Overnight culture of MC with compound 48/80 resulted in reduced cell surface MRGPRX2 expression, and this was associated with a significant decrease in subsequent MC degranulation in response to compound 48/80 or AG-30/5C. However, AG-30/5C pretreatment had no effect on cell surface MRGPRX2 expression or degranulation in response to compound 48/80 or AG-30/5C. Icatibant, a bradykinin B2 receptor antagonist, promotes MC degranulation via MRGPRX2 and causes pseudoallergic drug reaction. Icatibant caused MC degranulation via a pertussis toxin-sensitive G protein but did not activate β-arrestin. A screen of the National Institutes of Health Clinical Collection library led to the identification of resveratrol as an inhibitor of MRGPRX2. Resveratrol inhibited compound 48/80-induced Tango and MC degranulation in response to compound 48/80, AG-30/5C, and Icatibant. This study demonstrates the novel finding that AG-30/5C and Icatibant serve as G protein-biased agonists for MRGPRX2, but compound 48/80 signals via both G protein and β-arrestin with distinct differences in receptor regulation.
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Affiliation(s)
- Saptarshi Roy
- Department of Pathology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Anirban Ganguly
- Department of Pathology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Maureen Haque
- Department of Pathology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Hydar Ali
- Department of Pathology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104
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233
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Kim WK, Moon JY, Cho JS, Ochirkhuyag E, Akanda MR, Park BY, Hur J. Protective efficacy of an inactivated Brucella abortus vaccine candidate lysed by GI24 against brucellosis in Korean black goats. CANADIAN JOURNAL OF VETERINARY RESEARCH = REVUE CANADIENNE DE RECHERCHE VETERINAIRE 2019; 83:68-74. [PMID: 30670904 PMCID: PMC6318821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 04/02/2018] [Indexed: 06/09/2023]
Abstract
The efficacy of GI24-lysed Brucella abortus cells as a vaccine candidate against brucellosis in goats was evaluated on 2 groups of Korean black goats. Group A goats were immunized subcutaneously (SC) with sterile phosphate-buffered saline, whereas group B goats were immunized SC with approximately 3 × 109 lysed B. abortus cells. Subcutaneous immunization with the lysed cells did not cause any negative impact on the overall clinical status, such as behavior and appetite, throughout the study period. The enzyme-linked immunosorbent assay (ELISA) optical densities values for B. abortus lipopolysaccharide in serum were considerably higher in group B than those in group A. Also, the levels of the cytokines interleukin 4 (IL-4), tumor necrosis factor-alpha (TNF-α), and interferon gamma (IFN-γ) were significantly elevated in group B compared with those in group A. Following intraconjunctival challenge with B. abortus strain 544, the severity of brucellosis in terms of infection index and colonization of B. abortus in tissues was significantly lower in group B than in group A. The present study concluded that 3 of 5 goats immunized with GI24-lysed bacteria were completely protected against challenge. Future investigations are required to improve the protective efficacy offered by lysed B. abortus cells for practical applications in small ruminants.
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Affiliation(s)
- Wong-Kyong Kim
- Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Kim, Moon, Cho, Ochirkhuyag, Hur); Veterinary Histology, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Akanda, Park)
| | - Ja-Young Moon
- Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Kim, Moon, Cho, Ochirkhuyag, Hur); Veterinary Histology, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Akanda, Park)
| | - Jeong-Sang Cho
- Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Kim, Moon, Cho, Ochirkhuyag, Hur); Veterinary Histology, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Akanda, Park)
| | - Enkhsaikhan Ochirkhuyag
- Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Kim, Moon, Cho, Ochirkhuyag, Hur); Veterinary Histology, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Akanda, Park)
| | - Md Rashedunnabi Akanda
- Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Kim, Moon, Cho, Ochirkhuyag, Hur); Veterinary Histology, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Akanda, Park)
| | - Byung-Yong Park
- Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Kim, Moon, Cho, Ochirkhuyag, Hur); Veterinary Histology, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Akanda, Park)
| | - Jin Hur
- Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Kim, Moon, Cho, Ochirkhuyag, Hur); Veterinary Histology, College of Veterinary Medicine, Chonbuk National University, Gobong-ro 79, Iksan, Jeollabuk-do, Republic of Korea (Akanda, Park)
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234
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Suresh MK, Biswas R, Biswas L. An update on recent developments in the prevention and treatment of Staphylococcus aureus biofilms. Int J Med Microbiol 2019; 309:1-12. [DOI: 10.1016/j.ijmm.2018.11.002] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 11/19/2018] [Accepted: 11/26/2018] [Indexed: 12/17/2022] Open
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235
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Aisenbrey C, Marquette A, Bechinger B. The Mechanisms of Action of Cationic Antimicrobial Peptides Refined by Novel Concepts from Biophysical Investigations. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1117:33-64. [PMID: 30980352 DOI: 10.1007/978-981-13-3588-4_4] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Even 30 years after the discovery of magainins, biophysical and structural investigations on how these peptides interact with membranes can still bear surprises and add new interesting detail to how these peptides exert their antimicrobial action. Early on, using oriented solid-state NMR spectroscopy, it was found that the amphipathic helices formed by magainins are active when being oriented parallel to the membrane surface. More recent investigations indicate that this in-planar alignment is also found when PGLa and magainin in combination exert synergistic pore-forming activities, where studies on the mechanism of synergistic interaction are ongoing. In a related manner, the investigation of dimeric antimicrobial peptide sequences has become an interesting topic of research which bears promise to refine our views how antimicrobial action occurs. The molecular shape concept has been introduced to explain the effects of lipids and peptides on membrane morphology, locally and globally, and in particular of cationic amphipathic helices that partition into the membrane interface. This concept has been extended in this review to include more recent ideas on soft membranes that can adapt to external stimuli including membrane-disruptive molecules. In this manner, the lipids can change their shape in the presence of low peptide concentrations, thereby maintaining the bilayer properties. At higher peptide concentrations, phase transitions occur which lead to the formation of pores and membrane lytic processes. In the context of the molecular shape concept, the properties of lipopeptides, including surfactins, are shortly presented, and comparisons with the hydrophobic alamethicin sequence are made.
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Affiliation(s)
| | - Arnaud Marquette
- Université de Strasbourg/CNRS, UMR7177, Institut de Chimie, Strasbourg, France
| | - Burkhard Bechinger
- Université de Strasbourg/CNRS, UMR7177, Institut de Chimie, Strasbourg, France. .,Faculté de chimie, Institut le Bel, Strasbourg, France.
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236
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Shanti A, Teo J, Stefanini C. In Vitro Immune Organs-on-Chip for Drug Development: A Review. Pharmaceutics 2018; 10:E278. [PMID: 30558264 PMCID: PMC6320867 DOI: 10.3390/pharmaceutics10040278] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 11/12/2018] [Accepted: 11/21/2018] [Indexed: 12/15/2022] Open
Abstract
The current drug development practice lacks reliable and sensitive techniques to evaluate the immunotoxicity of drug candidates, i.e., their effect on the human immune system. This, in part, has resulted in a high attrition rate for novel drugs candidates. Organ-on-chip devices have emerged as key tools that permit the study of human physiology in controlled in vivo simulating environments. Furthermore, there has been a growing interest in developing the so called "body-on-chip" devices to better predict the systemic effects of drug candidates. This review describes existing biomimetic immune organs-on-chip, highlights their physiological relevance to drug development and discovery and emphasizes the need for developing comprehensive immune system-on-chip models. Such immune models can enhance the performance of novel drug candidates during clinical trials and contribute to reducing the high attrition rate as well as the high cost associated with drug development.
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Affiliation(s)
- Aya Shanti
- Department of Biomedical Engineering, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box 127788, UAE.
| | - Jeremy Teo
- Division of Engineering, New York University Abu Dhabi, Abu Dhabi, P.O. Box 129188, UAE.
- Department of Mechanical and Aerospace Engineering, New York University, New York City, P.O. Box 903, NY 10276-0903, USA.
| | - Cesare Stefanini
- Healthcare Engineering Innovation Center, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box 127788, UAE.
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237
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Topman S, Tamir‐Ariel D, Bochnic‐Tamir H, Stern Bauer T, Shafir S, Burdman S, Hayouka Z. Random peptide mixtures as new crop protection agents. Microb Biotechnol 2018; 11:1027-1036. [PMID: 29488347 PMCID: PMC6196386 DOI: 10.1111/1751-7915.13258] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 01/26/2018] [Indexed: 12/03/2022] Open
Abstract
Many types of crops are severely affected by at least one important bacterial disease. Chemical control of bacterial plant diseases in the field vastly relies on copper-based bactericides, yet with limited efficacy. In this study, we explored the potential of two random peptide mixture (RPM) models as novel crop protection agents. These unique peptide mixtures consist of random combination of l-phenylalanine and l- or d-lysine (FK-20 and FdK-20, respectively) along the 20 mer chain length of the peptides. Both RPMs displayed powerful bacteriostatic and bactericidal activities towards strains belonging to several plant pathogenic bacterial genera, for example, Xanthomonas, Clavibacter and Pseudomonas. In planta studies in the glasshouse revealed that RPMs significantly reduced disease severity of tomato and kohlrabi plants infected with Xanthomonas perforans and Xanthomonas campestris pv. campestris respectively. Moreover, RPM effects on reduction in disease severity were similar to those exerted by the commercial copper-based bactericide Kocide 2000 that was applied at a 12-fold higher concentration of the active compound relative to the RPM treatments. Importantly, the two tested RPM compounds had no toxic effect on survival of bees and Caco-2 mammalian cells. This study demonstrates the potential of these innovative RPMs to serve as crop protection agents against crop diseases caused by phytopathogenic bacteria.
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Affiliation(s)
- Shiri Topman
- Institute of Biochemistry, Food Science and NutritionThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
- Department of Plant Pathology and MicrobiologyThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
| | - Dafna Tamir‐Ariel
- Department of Plant Pathology and MicrobiologyThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
| | - Heli Bochnic‐Tamir
- Institute of Biochemistry, Food Science and NutritionThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
| | - Tal Stern Bauer
- Institute of Biochemistry, Food Science and NutritionThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
| | - Sharoni Shafir
- Department of EntomologyThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
| | - Saul Burdman
- Department of Plant Pathology and MicrobiologyThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
| | - Zvi Hayouka
- Institute of Biochemistry, Food Science and NutritionThe Robert H. Smith Faculty of Agriculture, Food and EnvironmentThe Hebrew University of JerusalemRehovot76100Israel
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238
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Díaz-Roa A, Patarroyo MA, Bello FJ, Da Silva PI. Sarconesin: Sarconesiopsis magellanica Blowfly Larval Excretions and Secretions With Antibacterial Properties. Front Microbiol 2018; 9:2249. [PMID: 30323791 PMCID: PMC6172317 DOI: 10.3389/fmicb.2018.02249] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/03/2018] [Indexed: 10/28/2022] Open
Abstract
Larval therapy (LT) is an alternative treatment for healing chronic wounds; its action is based on debridement, the removal of bacteria, and stimulating granulation tissue. The most important mechanism when using LT for combating infection depends on larval excretions and secretions (ES). Larvae are protected against infection by a spectrum of antimicrobial peptides (AMPs); special interest in AMPs has also risen regarding understanding their role in wound healing since they degrade necrotic tissue and kill different bacteria during LT. Sarconesiopsis magellanica (Diptera: Calliphoridae) is a promising medically-important necrophagous fly. This article reports a small AMP being isolated from S. magellanica ES products for the first time; these products were obtained from third-instar larvae taken from a previously-established colony. ES were fractionated by RP-HPLC using C18 columns for the first analysis; the products were then lyophilised and their antimicrobial activity was characterized by incubation with different bacterial strains. These fractions' primary sequences were determined by mass spectrometry and de novo sequencing; five AMPs were obtained, the Sarconesin fraction was characterized and antibacterial activity was tested in different concentrations with minimum inhibitory concentrations starting at 1.2 μM. Potent inhibitory activity was shown against Gram-negative (Escherichia coli D31, E. coli DH5α, Salmonella enterica ATCC 13314, Pseudomonas aeruginosa 27853) and Gram-positive (Staphylococcus aureus ATCC 29213, S. epidermidis ATCC 12228, Micrococcus luteus A270) bacteria. Sarconesin has a significant similarity with Rho-family GTPases which are important in organelle development, cytoskeletal dynamics, cell movement, and wound repair. The data reported here indicated that Sarconesin could be an alternative candidate for use in therapeutics against Gram-negative and Gram-positive bacterial infections. Our study describes one peptide responsible for antibacterial activity when LT is being used. The results shown here support carrying out further experiments aimed at validating S. magellanica AMPs as novel resources for combating antibacterial resistance.
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Affiliation(s)
- Andrea Díaz-Roa
- Laboratório Especial de Toxinologia Aplicada, Instituto Butantan, São Paulo, Brazil.,PhD Programme in Biomedical and Biological Sciences, Universidad del Rosario, Bogotá, Colombia.,Biomedical Sciences Institute, Universidade de São Paulo, São Paulo, Brazil
| | - Manuel A Patarroyo
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia, Bogotá, Colombia.,Basic Sciences Department, School of Medicine and Health Sciences, Universidad del Rosario, Bogotá, Colombia
| | - Felio J Bello
- Faculty of Agricultural and Livestock Sciences, Program of Veterinary Medicine, Universidad de La Salle, Bogotá, Colombia.,Medicine Faculty, Universidad Antonio Nariño, Bogotá, Colombia
| | - Pedro I Da Silva
- Laboratório Especial de Toxinologia Aplicada, Instituto Butantan, São Paulo, Brazil.,Biomedical Sciences Institute, Universidade de São Paulo, São Paulo, Brazil
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239
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Abstract
BACKGROUND The key elements in the therapy of surgical site infections (SSI) are surgical debridement and local and systemic antibiotic therapy; however, due to increasing antibiotic resistance, the development of additional therapeutic measures is of great interest for future trauma and orthopedic surgery. METHOD Against the background of our own experimental and clinical experiences and on the basis of the current literature, possible future anti-infective strategies were elaborated. RESULTS/CONCLUSIONS Bacteriophages were discovered and clinically implemented approximately one century ago and have been used in Western Europe for about one decade. They are currently used mainly in patients with burn injuries. It is likely that bacteriophages will become of great importance in view of the increasing antibiotic multi-drug resistance; however, they will probably not entirely replace antibiotic drugs. A combined use of bacteriophages and antibiotics is likely to be a more reasonable efficient therapy. In addition, the clinical importance of antimicrobial peptides (AMP) also increases. Up to now the possible use of AMPs is still experimental; however, individual AMPs are already established in the routine therapy (e. g. colistin). Further diagnostic and therapeutic measures may include photodynamic therapy, ultraviolet (UV) light application and differentiated genome analysis as well as the individual metabolism situation (metabolomics) of the pathogen cell and the patient tissue.
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240
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Lüddecke T, Schulz S, Steinfartz S, Vences M. A salamander’s toxic arsenal: review of skin poison diversity and function in true salamanders, genus Salamandra. Naturwissenschaften 2018; 105:56. [DOI: 10.1007/s00114-018-1579-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/03/2018] [Accepted: 08/05/2018] [Indexed: 12/16/2022]
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241
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Kim J, Yang YL, Jang SH, Jang YS. Human β-defensin 2 plays a regulatory role in innate antiviral immunity and is capable of potentiating the induction of antigen-specific immunity. Virol J 2018; 15:124. [PMID: 30089512 PMCID: PMC6083524 DOI: 10.1186/s12985-018-1035-2] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 07/30/2018] [Indexed: 01/07/2023] Open
Abstract
Background Antimicrobial peptides (AMPs) are primarily known for their innate immune defense against invading microorganisms, including viruses. In addition, recent research has suggested their modulatory activity in immune induction. Given that most subunit vaccines require an adjuvant to achieve effective immune induction through the activation of innate immunity, AMPs are plausible candidate molecules for stimulating not only innate immune but also adaptive immune responses. Results In this study, we investigated the ability of human β-defensin (HBD) 2 to promote antiviral immunity in vitro and in vivo using a receptor-binding domain (RBD) of Middle East respiratory syndrome-coronavirus (MERS-CoV) spike protein (S RBD) as a model antigen (Ag). When HBD 2-conjugated S RBD was used to treat THP-1 human monocytic cells, the expression levels of antiviral (IFN-β, IFN-γ, MxA, PKR, and RNaseL) and primary immune-inducing (NOD2, TNF-α, IL-1β, and IL-6) molecules were enhanced compared to those expressed after treatment with S RBD only. The expression of chemokines capable of recruiting leukocytes, including monocytes/macrophages, natural killer cells, granulocytes, T cells, and dendritic cells, was also increased following HBD 2-conjugated S RBD treatment. More important, immunization of mice with HBD 2-conjugated S RBD enhanced the immunogenicity of the S RBD and elicited a higher S RBD-specific neutralizing antibody response than S RBD alone. Conclusions We conclude that HBD 2 activates the primary antiviral innate immune response and may also mediate the induction of an effective adaptive immune response against a conjugated Ag.
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Affiliation(s)
- Ju Kim
- Department of Molecular Biology and the Institute for Molecular Biology and Genetics, Chonbuk National University, Jeonju, 54896, Korea
| | - Ye Lin Yang
- Department of Bioactive Material Sciences and Institute of Bioactive Materials, Chonbuk National University, Jeonju, 54896, Korea
| | - Sun-Hee Jang
- Department of Molecular Biology and the Institute for Molecular Biology and Genetics, Chonbuk National University, Jeonju, 54896, Korea
| | - Yong-Suk Jang
- Department of Molecular Biology and the Institute for Molecular Biology and Genetics, Chonbuk National University, Jeonju, 54896, Korea. .,Department of Bioactive Material Sciences and Institute of Bioactive Materials, Chonbuk National University, Jeonju, 54896, Korea.
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242
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Pandit G, Ilyas H, Ghosh S, Bidkar AP, Mohid SA, Bhunia A, Satpati P, Chatterjee S. Insights into the Mechanism of Antimicrobial Activity of Seven-Residue Peptides. J Med Chem 2018; 61:7614-7629. [DOI: 10.1021/acs.jmedchem.8b00353] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Gopal Pandit
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
| | - Humaira Ilyas
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme, VII (M), Kolkata 700054, India
| | - Suvankar Ghosh
- Department of Biosciences and Bioengineering, IIT, Guwahati 781039, India
| | - Anil P. Bidkar
- Department of Biosciences and Bioengineering, IIT, Guwahati 781039, India
| | - Sk. Abdul Mohid
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme, VII (M), Kolkata 700054, India
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme, VII (M), Kolkata 700054, India
| | | | - Sunanda Chatterjee
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
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243
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Santos JC, Sousa RC, Otoni CG, Moraes AR, Souza VG, Medeiros EA, Espitia PJ, Pires AC, Coimbra JS, Soares NF. Nisin and other antimicrobial peptides: Production, mechanisms of action, and application in active food packaging. INNOV FOOD SCI EMERG 2018. [DOI: 10.1016/j.ifset.2018.06.008] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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244
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Effects of early feeding and dietary interventions on development of lymphoid organs and immune competence in neonatal chickens: A review. Vet Immunol Immunopathol 2018; 201:1-11. [DOI: 10.1016/j.vetimm.2018.05.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 05/04/2018] [Accepted: 05/06/2018] [Indexed: 12/14/2022]
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245
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Järvå M, Phan TK, Lay FT, Caria S, Kvansakul M, Hulett MD. Human β-defensin 2 kills Candida albicans through phosphatidylinositol 4,5-bisphosphate-mediated membrane permeabilization. SCIENCE ADVANCES 2018; 4:eaat0979. [PMID: 30050988 PMCID: PMC6059731 DOI: 10.1126/sciadv.aat0979] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
Human defensins belong to a subfamily of the cationic antimicrobial peptides and act as a first line of defense against invading microbes. Their often broad-spectrum antimicrobial and antitumor activities make them attractive for therapeutic development; however, their precise molecular mechanism(s) of action remains to be defined. We show that human β-defensin 2 (HBD-2) permeabilizes Candida albicans cell membranes via a mechanism targeting the plasma membrane lipid phosphatidylinositol 4,5-bisphosphate (PIP2). We determined the structure of HBD-2 bound to PIP2, which revealed two distinct PIP2-binding sites, and showed, using functional assays, that mutations in these sites ablate PIP2-mediated fungal growth inhibition by HBD-2. Our study provides the first insight into lipid-mediated human defensin membrane permeabilization at an atomic level and reveals a unique mode of lipid engagement to permeabilize cell membranes.
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Affiliation(s)
- Michael Järvå
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia
| | - Thanh Kha Phan
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia
| | - Fung T Lay
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia
| | - Sofia Caria
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia
- SAXS/WAXS Beamline, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Marc Kvansakul
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia
| | - Mark D Hulett
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia
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246
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Cipcigan F, Carrieri AP, Pyzer-Knapp EO, Krishna R, Hsiao YW, Winn M, Ryadnov MG, Edge C, Martyna G, Crain J. Accelerating molecular discovery through data and physical sciences: Applications to peptide-membrane interactions. J Chem Phys 2018; 148:241744. [DOI: 10.1063/1.5027261] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Flaviu Cipcigan
- IBM Research UK, Hartree Centre, Daresbury WA4 4AD, United Kingdom
| | | | | | - Ritesh Krishna
- IBM Research UK, Hartree Centre, Daresbury WA4 4AD, United Kingdom
| | - Ya-Wen Hsiao
- STFC Daresbury Laboratories, Daresbury WA4 4AD, United Kingdom
| | - Martyn Winn
- STFC Daresbury Laboratories, Daresbury WA4 4AD, United Kingdom
| | - Maxim G. Ryadnov
- National Physical Laboratory, Hampton Road, Teddington, United Kingdom
| | - Colin Edge
- GSK Medicines Research Centre, Stevenage SG1 2NY, United Kingdom
| | - Glenn Martyna
- IBM T. J. Watson Research Center, Yorktown Heights, New York 10598, USA
| | - Jason Crain
- IBM Research UK, Hartree Centre, Daresbury WA4 4AD, United Kingdom
- Maxwell Centre, University of Cambridge, Cambridge CB3 0HE, United Kingdom
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247
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Abdillahi SM, Maaß T, Kasetty G, Strömstedt AA, Baumgarten M, Tati R, Nordin SL, Walse B, Wagener R, Schmidtchen A, Mörgelin M. Collagen VI Contains Multiple Host Defense Peptides with Potent In Vivo Activity. THE JOURNAL OF IMMUNOLOGY 2018; 201:1007-1020. [PMID: 29925677 DOI: 10.4049/jimmunol.1700602] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 06/01/2018] [Indexed: 11/19/2022]
Abstract
Collagen VI is a ubiquitous extracellular matrix component that forms extensive microfibrillar networks in most connective tissues. In this study, we describe for the first time, to our knowledge, that the collagen VI von Willebrand factor type A-like domains exhibit a broad-spectrum antimicrobial activity against Gram-positive and Gram-negative bacteria in human skin infections in vivo. In silico sequence and structural analysis of VWA domains revealed that they contain cationic and amphipathic peptide sequence motifs, which might explain the antimicrobial nature of collagen VI. In vitro and in vivo studies show that these peptides exhibited significant antibacterial activity against Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa through membrane disruption. Our findings shed new light on the role of collagen VI-derived peptides in innate host defense and provide templates for development of peptide-based antibacterial therapies.
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Affiliation(s)
- Suado M Abdillahi
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, 221 84 Lund, Sweden;
| | - Tobias Maaß
- Center for Biochemistry, Medical Faculty, Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Gopinath Kasetty
- Division of Respiratory Medicine and Allergology, Department of Clinical Sciences, Lund University, 221 84 Lund, Sweden
| | - Adam A Strömstedt
- Pharmacognosy, Department of Medicinal Chemistry, Uppsala University, 751 23 Uppsala, Sweden
| | - Maria Baumgarten
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, 221 84 Lund, Sweden
| | - Ramesh Tati
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, 221 84 Lund, Sweden
| | - Sara L Nordin
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, 221 84 Lund, Sweden
| | - Björn Walse
- Saromics Biostructures AB, 223 63 Lund, Sweden
| | - Raimund Wagener
- Center for Biochemistry, Medical Faculty, Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Artur Schmidtchen
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, 221 84 Lund, Sweden.,Copenhagen Wound Healing Center, Bispebjerg Hospital, Department of Biomedical Sciences, University of Copenhagen, 2400 Copenhagen, Denmark and
| | - Matthias Mörgelin
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, 221 84 Lund, Sweden.,Colzyx AB, 223 81 Lund, Sweden
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248
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Bellich B, Lagatolla C, Tossi A, Benincasa M, Cescutti P, Rizzo R. Influence of Bacterial Biofilm Polysaccharide Structure on Interactions with Antimicrobial Peptides: A Study on Klebsiella pneumoniae. Int J Mol Sci 2018; 19:ijms19061685. [PMID: 29882774 PMCID: PMC6032227 DOI: 10.3390/ijms19061685] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/18/2018] [Accepted: 06/01/2018] [Indexed: 11/20/2022] Open
Abstract
Biofilms are complex systems produced by bacteria and constituted by macromolecular matrix embedding cells. They provide advantages to bacteria including protection against antimicrobials. The protection given by biofilms produced by Klebsiella pneumoniae strains towards antimicrobial peptides of the innate immune system was investigated. In particular, the role of matrix bacterial exopolysaccharides was explored. Three clinical strains producing exopolysaccharides with different chemistry were selected and the interaction of purified biofilm polysaccharides with two bovine cathelicidins was studied by circular dichroism spectroscopy and microbiological assays to establish their influence on the peptide’s antimicrobial activity. The spectroscopic data indicated a different extent of interaction with the two peptides, in a manner dependent on their sugar composition, and in particular the presence of rhamnose residues correlated with a lower interaction. The extent of interaction was then related to the protection towards antimicrobial peptides, conferred by the addition of the different exopolysaccharides, in minimum inhibitory concentration (MIC) assays against a reference Escherichia coli strain. Microbiological results were in very good agreement with spectroscopic data, confirming the active role of matrix polysaccharides in determining a biofilm’s protective capacity and indicating lower protection levels afforded by rhamnose containing exopolysaccharides.
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Affiliation(s)
- Barbara Bellich
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy.
| | - Cristina Lagatolla
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy.
| | - Alessandro Tossi
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy.
| | - Monica Benincasa
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy.
| | - Paola Cescutti
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy.
| | - Roberto Rizzo
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy.
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249
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Zhou C, Zou H, Li M, Sun C, Ren D, Li Y. Fiber optic surface plasmon resonance sensor for detection of E. coli O157:H7 based on antimicrobial peptides and AgNPs-rGO. Biosens Bioelectron 2018; 117:347-353. [PMID: 29935488 DOI: 10.1016/j.bios.2018.06.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/17/2018] [Accepted: 06/02/2018] [Indexed: 12/19/2022]
Abstract
A fiber optic surface plasmon resonance (FOSPR) sensor was developed for detection of Escherichia coli O157:H7 (E. coli O157:H7) in water and juice, based on antimicrobial peptides (AMP), Magainin I, as recognition elements and silver nanoparticles-reduced graphene oxide (AgNPs-rGO) nanocomposites assisted signal amplification. The uniform AgNPs-rGO was fixed on the surface of optical fiber and covered with gold film. Not only was the SPR response greatly enhanced, but also the AgNPs was prevented from being oxidized. The FOSPR showed a sensitivity of about 1.5 times higher than that fabricated only with gold film. In the assay, Magainin I, immobilized on the surface of gold film, could specifically capture E. coli O157:H7, resulting in the wavelength shift of the SPR absorption peak. Under the optimized conditions, the SPR resonance wavelength exhibited a good linear relationship with natural logarithm of the target bacteria concentration in the range of 1.0 × 103 to 5.0 × 107 cfu/mL with the detection limit of 5.0 × 102 cfu/mL (S/N = 3). The FOSPR sensor showed good specificity for E. coli O157:H7 detection compared to other bacteria similar to the target bacterial species. Furthermore, the FOSPR sensor was successfully applied to the detection of E. coli O157:H7 in water, fruit and vegetable juice with the satisfactory recoveries of 88-110%. This assay for E. coli O157:H7 detection possesses high sensitivity, good selectivity, reproducibility and stability. In addition, the AMP based SPR biosensing methodology could be extended to detect a wide variety of foodborne pathogens. Therefore, the versatile method might become a potential alternative tool in food analysis and early clinical diagnosis.
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Affiliation(s)
- Chen Zhou
- West China School of Public Health, Sichuan University, Chengdu, China
| | - Haimin Zou
- West China School of Public Health, Sichuan University, Chengdu, China; Chengdu Center for Disease Control and Prevention, Chengdu, China
| | - Ming Li
- Chengdu Center for Disease Control and Prevention, Chengdu, China
| | - Chengjun Sun
- West China School of Public Health, Sichuan University, Chengdu, China
| | - Dongxia Ren
- West China School of Public Health, Sichuan University, Chengdu, China
| | - Yongxin Li
- West China School of Public Health, Sichuan University, Chengdu, China; College of Life Sciences, Sichuan University, Chengdu, China.
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250
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Heimroth RD, Casadei E, Salinas I. Effects of Experimental Terrestrialization on the Skin Mucus Proteome of African Lungfish ( Protopterus dolloi). Front Immunol 2018; 9:1259. [PMID: 29915597 PMCID: PMC5994560 DOI: 10.3389/fimmu.2018.01259] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 05/18/2018] [Indexed: 11/13/2022] Open
Abstract
Animal mucosal barriers constantly interact with the external environment, and this interaction is markedly different in aquatic and terrestrial environments. Transitioning from water to land was a critical step in vertebrate evolution, but the immune adaptations that mucosal barriers such as the skin underwent during that process are essentially unknown. Vertebrate animals such as the African lungfish have a bimodal life, switching from freshwater to terrestrial habitats when environmental conditions are not favorable. African lungfish skin mucus secretions contribute to the terrestrialization process by forming a cocoon that surrounds and protects the lungfish body. The goal of this study was to characterize the skin mucus immunoproteome of African lungfish, Protopterus dolloi, before and during the induction phase of terrestrialization as well as the immunoproteome of the gill mucus during the terrestrialization induction phase. Using LC-MS/MS, we identified a total of 974 proteins using a lungfish Illumina RNA-seq database, 1,256 proteins from previously published lungfish sequence read archive and 880 proteins using a lungfish 454 RNA-seq database for annotation in the three samples analyzed (free-swimming skin mucus, terrestrialized skin mucus, and terrestrialized gill mucus). The terrestrialized skin mucus proteome was enriched in proteins with known antimicrobial functions such as histones and S100 proteins compared to free-swimming skin mucus. In support, gene ontology analyses showed that the terrestrialized skin mucus proteome has predicted functions in processes such as viral process, defense response to Gram-negative bacterium, and tumor necrosis factor-mediated signaling. Importantly, we observed a switch in immunoglobulin heavy chain secretion upon terrestrialization, with IgW1 long form (IgW1L) and IgM1 present in free-swimming skin mucus and IgW1L, IgM1, and IgM2 in terrestrialized skin mucus. Combined, these results indicate an increase in investment in the production of unique immune molecules in P. dolloi skin mucus in response to terrestrialization that likely better protects lungfish against external aggressors found in land.
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Affiliation(s)
| | | | - Irene Salinas
- Center for Evolutionary and Theoretical Immunology (CETI), Department of Biology, University of New Mexico, Albuquerque, NM, United States
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