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Lu H, Wang C, Lu W, Li X, Wang G, Dong W, Wang X, Chen H, Tan C. Antibacterial efficacy and mechanism of Cyprinus carpio chemokine-derived L-10 against multidrug-resistant Escherichia coli infections. Int J Antimicrob Agents 2024; 63:107104. [PMID: 38325720 DOI: 10.1016/j.ijantimicag.2024.107104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 01/02/2024] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
OBJECTIVES Antimicrobial resistance has raised concerns regarding untreatable infections and poses a growing threat to public health. Rational design of new AMPs is an ideal solution to this threat. METHODS In this study, we designed, modified, and synthesised an excellent AMP, L-10, based on the original sequence of the Cyprinus carpio chemokine. All experimental data were presented as the mean ± standard deviation (SD), and the two-tailed unpaired T-test method was used to analyze all data. RESULTS L-10 exhibited excellent antibacterial activity with negligible toxicity and improved the efficacy of a broad class of antibiotics against MDR Gram-negative pathogens, including tetracycline, meropenem, levofloxacin, and rifampin. Mechanistic studies have suggested that L-10 targets the bacterial membrane components, LPS and PG, to disrupt bacterial membrane integrity, thereby exerting antibacterial effects and enhancing the efficacy of antibiotics. Moreover, in animal infection models, L-10 significantly increased the survival rate of infected animals and effectively reduced the tissue bacterial load and inflammatory factor levels. In addition to its direct antibacterial activity, L-10 dramatically reduced pulmonary pathological alterations in a mouse model of endotoxemia and suppressed LPS-induced proinflammatory cytokines in vitro and in vivo. Lastly, L-10 was successfully expressed in Pichia pastoris and maintained antimicrobial activity against MDR Gram-negative pathogens in vivo and in vitro. CONCLUSION Collectively, these results reveal the potential of L-10 as an ideal candidate against MDR bacterial infections and provide new insights into the design, development, and clinical application of AMPs.
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Affiliation(s)
- Hao Lu
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Chenchen Wang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Wenjia Lu
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Xiaodan Li
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Gaoyan Wang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Wenqi Dong
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Xiangru Wang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China; Frontiers Science Center for Animal Breeding and Sustainable Production, Wuhan, Hubei, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, Hubei, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Huanchun Chen
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China; Frontiers Science Center for Animal Breeding and Sustainable Production, Wuhan, Hubei, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, Hubei, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Chen Tan
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China; Frontiers Science Center for Animal Breeding and Sustainable Production, Wuhan, Hubei, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, Hubei, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China.
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2
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Koosehlar E, Mohabatkar H, Behbahani M. In Silico and In vitro Evaluations of the Antibacterial Activities of HIV-1 Nef Peptides against Pseudomonas aeruginosa. INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE 2024; 13:46-63. [PMID: 39156869 PMCID: PMC11329932 DOI: 10.22088/ijmcm.bums.13.1.46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 05/21/2024] [Accepted: 05/29/2024] [Indexed: 08/20/2024]
Abstract
One of the burning issues facing healthcare organizations is multidrug-resistant (MDR) bacteria. P. aeruginosa is an MDR opportunistic bacterium responsible for nosocomial and fatal infections in immunosuppressed individuals. According to previous studies, efflux pump activity and biofilm formation are the most common resistance mechanisms in P. aeruginosa. The aim of this study was to propose new antimicrobial peptides (AMPs) that target P. aeruginosa and can effectively address these resistance mechanisms through in silico and in vitro assessments. Since AMPs are an attractive alternative to antibiotics, in vitro experiments were carried out along with bioinformatics analyses on 19 Nef peptides (derived from the HIV-1 Nef protein) in the current study. Several servers, including Dbaasps, Antibp2, CLASSAMP2, ToxinPred, dPABBs and ProtParam were used to predict Nef peptides as AMPs. To evaluate the binding affinities, a molecular docking analysis was performed with the HADDOCK web server for all Nef peptide models against two effective proteins of P. aeruginosa (MexB and PqsR) that play a role in efflux and quorum sensing. Moreover, the antibacterial and antibiofilm activity of the Nef peptides was investigated in a resistant strain of P. aeruginosa. The results of molecular docking revealed that all Nef peptides have a significant binding affinity to the abovementioned proteins. Nef-Peptide-19 has the highest affinity to the active sites of MexB and PqsR with the HADDOCK scores of -136.1 ± 1.7 and -129.4 ± 2, respectively. According to the results of in vitro evaluation, Nef peptide 19 showed remarked activity against P. aeruginosa with minimum inhibitory and bactericidal concen-trations (MIC and MBC) of 10 µM and 20 µM, respectively. In addition, biofilm inhibitory activity was observed at a concentration of 20 µM. Finally, Nef peptide 19 is proposed as a new AMP against P. aeruginosa.
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Affiliation(s)
| | | | - Mandana Behbahani
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan 81746-73441, Iran.
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Wang WF, Cheng CX, Liu H, Chen XL, Wang HL. 6His-tatritin promotes antimicrobial defense via regulating immune ability and intestinal microbial community in grass carp (Ctenopharyngodon idella). FISH & SHELLFISH IMMUNOLOGY 2023; 133:108532. [PMID: 36639064 DOI: 10.1016/j.fsi.2023.108532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Antimicrobial peptides are small, cationic, and amphiphilic peptides found in most organisms, and many of these peptides have broad antimicrobial activity against Gram-negative, -positive bacteria and fungi. In the present study, a derivative of antimicrobial peptide Tatritin, 6His-Tatritin, was designed and expressed by Pichia pastoris using a constitutive vector pGAPZαA with the promoter of pGAP. The 6His-Tatritin had a broad-spectrum antibacterial activity based on the Oxford cup method and the micro broth dilution test. In addition, to explore the role of 6His-Tatritin in vivo, grass carps (Ctenopharyngodon idellus) were infected with Aeromonas hydrophila after they were fed with 6His-Tatritin as feed additives for 28 days. The results revealed that 6His-Tatritin could significantly up-regulate the expression levels of Hepcidin, Leap-2b, Nrf-2, CuZn-SOD and LZM (P < 0.05). In addition, 6His-Tatritin could significantly reduce the mortality (P < 0.05) and the intestinal injury of grass carps infected with bacteria. The 16S sequencing analysis showed that the structure of microbial community in intestine of fish was more diversified compared with control after treatment with 6His-Tatritin. In summary, the peptide of 6His-Tatritin could promote antimicrobial defense via regulating immune ability and intestinal microbial community in grass carp. This study provides an effective method and approach for the application of antimicrobial peptide Tatritin in aquaculture, and also provides insights into the function of antimicrobial peptides in immunity against pathogens in fish.
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Affiliation(s)
- Wei-Feng Wang
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Chu-Xing Cheng
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Hong Liu
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiu-Li Chen
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, 530021, China
| | - Huan-Ling Wang
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China.
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4
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Xiao X, Lu H, Zhu W, Zhang Y, Huo X, Yang C, Xiao S, Zhang Y, Su J. A Novel Antimicrobial Peptide Derived from Bony Fish IFN1 Exerts Potent Antimicrobial and Anti-Inflammatory Activity in Mammals. Microbiol Spectr 2022; 10:e0201321. [PMID: 35289673 PMCID: PMC9045357 DOI: 10.1128/spectrum.02013-21] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 02/15/2022] [Indexed: 11/22/2022] Open
Abstract
Type I interferons (IFN-Is) are critical antiviral cytokine in innate immunity but with limited direct defense ability against bacterial infections in mammals. In bony fish, despite all the IFN-Is (IFN1-4) act in antiviral immunity, studies demonstrate that IFN1 can remarkably contribute to host defense against bacterial infections. In this study, we found that IFN1 from grass carp (Ctenopharyngodon idella) contains an unusual cationic and amphipathic α-helical region (named as gcIFN-20, sequence: SYEKKINRHFKILKKNLKKK). The synthesized peptide gcIFN-20 could form α-helical structure in a membrane environment and exerts potent antimicrobial activity against multiple species of Gram-negative (G-) and Gram-positive (G+) bacteria with negligible toxicity. Mechanism studies showed gcIFN-20 kills G+ bacteria through membrane disruption and cytoplasm outflow while G- bacteria through membrane permeation and protein synthesis inhibition. In two mouse bacterial infection models, gcIFN-20 therapy could significantly reduce tissue bacterial loads and mortalities. In addition to the direct antibacterial activity, we also found that gcIFN-20 could significantly suppress the lipopolysaccharide (LPS)-induced pro-inflammatory cytokines in vitro and in vivo, obviously alleviated lung lesions in a mouse endotoxemia model. The mechanism is that gcIFN-20 interacts with LPS, causes LPS aggregation and neutralization. The antimicrobial and anti-inflammatory activities in vivo of gcIFN-20 in mammalian models suggested a promising agent for developing peptide-based antibacterial therapy. IMPORTANCE Type I interferons play crucial role in antiviral immunity in both vertebrates and invertebrates. The powerful antimicrobial activity is recently reported in nonmammalian vertebrates. The present study identified a novel antimicrobial peptide (gcIFN-20) derived from grass carp interferon 1, found gcIFN-20 exhibits forceful bactericidal and anti-inflammatory activity in mammals, and efficient therapeutic effect against two clinical severe extraintestinal pathogenic Escherichia coli and a mouse endotoxemia models. The antimicrobial mechanisms are membrane disruption and cytoplasm overflow for Gram-positive bacteria, while membrane permeation and protein synthesis inhibition for Gram-negative bacteria. The anti-inflammatory mechanisms can be aggregating and neutralizing lipopolysaccharide to attenuate the binding with receptors and facilitate phagocytosis. The results indicate that gcIFN-20 can be a promising novel therapeutic agent for bacterial diseases and inflammatory disorders, especially as a potential weapon for multidrug resistant strain infections.
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Affiliation(s)
- Xun Xiao
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Hao Lu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Wentao Zhu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Yanqi Zhang
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Xingchen Huo
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Chunrong Yang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Shaobo Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Yongan Zhang
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China
- Hubei Hongshan Laboratory, Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
| | - Jianguo Su
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
- Hubei Hongshan Laboratory, Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
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Hu YZ, Ma ZY, Wu CS, Wang J, Zhang YA, Zhang XJ. LECT2 Is a Novel Antibacterial Protein in Vertebrates. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:2037-2053. [PMID: 35365566 DOI: 10.4049/jimmunol.2100812] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
In vertebrates, leukocyte-derived chemotaxin-2 (LECT2) is an important immunoregulator with conserved chemotactic and phagocytosis-stimulating activities to leukocytes during bacterial infection. However, whether LECT2 possesses direct antibacterial activity remains unknown. In this article, we show that, unlike tetrapods with a single LECT2 gene, two LECT2 genes exist in teleost fish, named LECT2-a and LECT2-b Using grass carp as a research model, we found that the expression pattern of grass carp LECT2-a (gcLECT2-a) is more similar to that of LECT2 in tetrapods, while gcLECT2-b has evolved to be highly expressed in mucosal immune organs, including the intestine and skin. Interestingly, we found that gcLECT2-b, with conserved chemotactic and phagocytosis-stimulating activities, can also kill Gram-negative and Gram-positive bacteria directly in a membrane-dependent and a non-membrane-dependent manner, respectively. Moreover, gcLECT2-b could prevent the adherence of bacteria to epithelial cells through agglutination by targeting peptidoglycan and lipoteichoic acid. Further study revealed that gcLECT2-b can protect grass carp from Aeromonas hydrophila infection in vivo, because it significantly reduces intestinal necrosis and tissue bacterial load. More importantly, we found that LECT2 from representative tetrapods, except human, also possesses direct antibacterial activities, indicating that the direct antibacterial property of LECT2 is generally conserved in vertebrates. Taken together, to our knowledge, our study discovered a novel function of LECT2 in the antibacterial immunity of vertebrates, especially teleost fish, greatly enhancing our knowledge of this important molecule.
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Affiliation(s)
- Ya-Zhen Hu
- State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
| | - Zi-You Ma
- State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
| | - Chang-Song Wu
- State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
| | - Jie Wang
- State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
| | - Yong-An Zhang
- State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China;
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
- Hubei Hongshan Laboratory, Wuhan, China; and
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xu-Jie Zhang
- State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China;
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, China
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Wang WF, Xie XY, Huang Y, Li YK, Liu H, Chen XL, Wang HL. Identification of a Novel Antimicrobial Peptide From the Ancient Marine Arthropod Chinese Horseshoe Crab, Tachypleus tridentatus. Front Immunol 2022; 13:794779. [PMID: 35401525 PMCID: PMC8984021 DOI: 10.3389/fimmu.2022.794779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 02/24/2022] [Indexed: 12/02/2022] Open
Abstract
Humoral immunity is the first line of defense in the invertebrate immune system, and antimicrobial peptides play an important role in this biological process. A novel antimicrobial peptide, termed Tatritin, was identified and characterized in hemolymph of Chinese horseshoe crab, Tachypleus tridentatus, infected with Gram-negative bacteria via transcriptome analysis. Tatritin was significantly induced by bacterial infection in hemolymph and gill. The preprotein of Tatritin consists of a signal peptide (21 aa) and a mature peptide (47 aa) enriched by cysteine. The putative mature peptide was 5.6 kDa with a theoretical isoelectric point (pI) of 9.99 and showed a α-helix structure in the N-terminal and an anti-parallel β-sheet structure in the cysteine-stabilized C-terminal region. The chemically synthesized peptide of Tatritin exhibited a broad spectrum of antimicrobial activity against Gram-negative and Gram-positive bacteria and fungi. Furthermore, Tatritin may recognize and inhibit pathogenic microorganisms by directly binding to LPS, DNA, and chitin. In addition, administration of Tatritin reduced the mortality of zebrafish after bacterial infection. Due to its broad-spectrum antimicrobial activity in vivo and in vitro and the sensitivity to drug-resistant bacterial strains, Tatritin peptide can be used as a new type of drug for infection treatment or as an immune enhancer in animals.
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Affiliation(s)
- Wei-Feng Wang
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Xiao-Yong Xie
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Yan Huang
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Yin-Kang Li
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Hong Liu
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Xiu-Li Chen
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, China
| | - Huan-Ling Wang
- Key Lab of Freshwater Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
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Huo X, Wang Z, Xiao X, Yang C, Su J. Nanopeptide CMCS-20H loaded by carboxymethyl chitosan remarkably enhances protective efficacy against bacterial infection in fish. Int J Biol Macromol 2022; 201:226-241. [PMID: 34995671 DOI: 10.1016/j.ijbiomac.2021.12.172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/10/2021] [Accepted: 12/27/2021] [Indexed: 01/21/2023]
Affiliation(s)
- Xingchen Huo
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China; Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhensheng Wang
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Xun Xiao
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Chunrong Yang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Jianguo Su
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China; Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China.
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Heselpoth RD, Euler CW, Fischetti VA. PaP1, a Broad-Spectrum Lysin-Derived Cationic Peptide to Treat Polymicrobial Skin Infections. Front Microbiol 2022; 13:817228. [PMID: 35369520 PMCID: PMC8965563 DOI: 10.3389/fmicb.2022.817228] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 01/27/2022] [Indexed: 11/20/2022] Open
Abstract
Most skin infections, including those complicating burns, are polymicrobial involving multiple causative bacteria. Add to this the fact that many of these organisms may be antibiotic-resistant, and a simple skin lesion or burn could soon become life-threatening. Membrane-acting cationic peptides from Gram-negative bacteriophage lysins can potentially aid in addressing the urgent need for alternative therapeutics. Such peptides natively constitute an amphipathic region within the structural composition of these lysins and function to permit outer membrane permeabilization in Gram-negative bacteria when added externally. This consequently allows the lysin to access and degrade the peptidoglycan substrate, resulting in rapid hypotonic lysis and bacterial death. When separated from the lysin, some of these cationic peptides kill sensitive bacteria more effectively than the native molecule via both outer and cytoplasmic membrane disruption. In this study, we evaluated the antibacterial properties of a modified cationic peptide from the broad-acting lysin PlyPa01. The peptide, termed PaP1, exhibited potent in vitro bactericidal activity toward numerous high priority Gram-positive and Gram-negative pathogens, including all the antibiotic-resistant ESKAPE pathogens. Both planktonic and biofilm-state bacteria were sensitive to the peptide, and results from time-kill assays revealed PaP1 kills bacteria on contact. The peptide was bactericidal over a wide temperature and pH range and could withstand autoclaving without loss of activity. However, high salt concentrations and complex matrices were found to be largely inhibitory, limiting its use to topical applications. Importantly, unlike other membrane-acting antimicrobials, PaP1 lacked cytotoxicity toward human cells. Results from a murine burn wound infection model using methicillin-resistant Staphylococcus aureus or multidrug-resistant Pseudomonas aeruginosa validated the in vivo antibacterial efficacy of PaP1. In these studies, the peptide enhanced the potency of topical antibiotics used clinically for treating chronic wound infections. Despite the necessity for additional preclinical drug development, the collective data from our study support PaP1 as a potential broad-spectrum monotherapy or adjunctive therapy for the topical treatment of polymicrobial infections and provide a foundation for engineering future lysin-derived peptides with improved antibacterial properties.
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Affiliation(s)
- Ryan D. Heselpoth
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, NY, United States
- *Correspondence: Ryan D. Heselpoth,
| | - Chad W. Euler
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, NY, United States
- Department of Medical Laboratory Sciences, Hunter College, New York, NY, United States
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, NY, United States
| | - Vincent A. Fischetti
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, NY, United States
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Luo X, Ye X, Ding L, Zhu W, Yi P, Zhao Z, Gao H, Shu Z, Li S, Sang M, Wang J, Zhong W, Chen Z. Fine-Tuning of Alkaline Residues on the Hydrophilic Face Provides a Non-toxic Cationic α-Helical Antimicrobial Peptide Against Antibiotic-Resistant ESKAPE Pathogens. Front Microbiol 2021; 12:684591. [PMID: 34335511 PMCID: PMC8319832 DOI: 10.3389/fmicb.2021.684591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 06/11/2021] [Indexed: 11/18/2022] Open
Abstract
Antibiotic-resistant ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) has become a serious threat to public health worldwide. Cationic α-helical antimicrobial peptides (CαAMPs) have attracted much attention as promising solutions in post-antibiotic era. However, strong hemolytic activity and in vivo inefficacy have hindered their pharmaceutical development. Here, we attempt to address these obstacles by investigating BmKn2 and BmKn2-7, two scorpion-derived CαAMPs with the same hydrophobic face and a distinct hydrophilic face. Through structural comparison, mutant design and functional analyses, we found that while keeping the hydrophobic face unchanged, increasing the number of alkaline residues (i.e., Lys + Arg residues) on the hydrophilic face of BmKn2 reduces the hemolytic activity and broadens the antimicrobial spectrum. Strikingly, when keeping the total number of alkaline residues constant, increasing the number of Lys residues on the hydrophilic face of BmKn2-7 significantly reduces the hemolytic activity but does not influence the antimicrobial activity. BmKn2-7K, a mutant of BmKn2-7 in which all of the Arg residues on the hydrophilic face were replaced with Lys, showed the lowest hemolytic activity and potent antimicrobial activity against antibiotic-resistant ESKAPE pathogens. Moreover, in vivo experiments indicate that BmKn2-7K displays potent antimicrobial efficacy against both the penicillin-resistant S. aureus and the carbapenem- and multidrug-resistant A. baumannii, and is non-toxic at the antimicrobial dosages. Taken together, our work highlights the significant functional disparity of Lys vs Arg in the scorpion-derived antimicrobial peptide BmKn2-7, and provides a promising lead molecule for drug development against ESKAPE pathogens.
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Affiliation(s)
- Xudong Luo
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China.,Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan, China
| | - Xiangdong Ye
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China.,Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan, China
| | - Li Ding
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China.,Department of Clinical Laboratory, Dongfeng Hospital, Hubei University of Medicine, Shiyan, China
| | - Wen Zhu
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China
| | - Pengcheng Yi
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China
| | - Zhiwen Zhao
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China
| | - Huanhuan Gao
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China
| | - Zhan Shu
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China
| | - Shan Li
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China
| | - Ming Sang
- Central Laboratory of Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Shiyan, China
| | - Jue Wang
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China
| | - Weihua Zhong
- Department of Rehabilitation Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Zongyun Chen
- Institute of Biomedicine and Hubei Key Laboratory of Embryonic Stem Cell Research, College of Basic Medicine, Hubei University of Medicine, Shiyan, China.,Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan, China
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10
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Cuartas V, Aragón-Muriel A, Liscano Y, Polo-Cerón D, Crespo-Ortiz MDP, Quiroga J, Abonia R, Insuasty B. Anticancer activity of pyrimidodiazepines based on 2-chloro-4-anilinoquinazoline: synthesis, DNA binding and molecular docking. RSC Adv 2021; 11:23310-23329. [PMID: 35479808 PMCID: PMC9036565 DOI: 10.1039/d1ra03509f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/25/2021] [Indexed: 01/27/2023] Open
Abstract
Multidrug resistance to chemotherapy is a critical health problem associated with mutation of the therapeutic target. Therefore, the development of anticancer agents remains a challenge to overcome cancer cell resistance. Herein, a new series of quinazoline-based pyrimidodiazepines 16a-g were synthesized by the cyclocondensation reaction of 2-chloro-4-anilinoquinazoline-chalcones 14a-g with 2,4,5,6-tetraaminopyrimidine. All quinazoline derivatives 14a-g and 16a-g were selected by the U.S. National Cancer Institute (NCI) for testing their anticancer activity against 60 cancer cell lines of different panels of human tumors. Among the tested compounds, quinazoline-chalcone 14g displayed high antiproliferative activity with GI50 values between 0.622-1.81 μM against K-562 (leukemia), RPMI-8226 (leukemia), HCT-116 (colon cancer) LOX IMVI (melanoma), and MCF7 (breast cancer) cancer cell lines. Additionally, the pyrimidodiazepines 16a and 16c exhibited high cytostatic (TGI) and cytotoxic activity (LC50), where 16c showed high cytotoxic activity, which was 10.0-fold higher than the standard anticancer agent adriamycin/doxorubicin against ten cancer cell lines. COMPARE analysis revealed that 16c may possess a mechanism of action through DNA binding that is similar to that of CCNU (lomustine). DNA binding studies indicated that 14g and 16c interact with the calf thymus DNA by intercalation and groove binding, respectively. Compounds 14g, 16c and 16a displayed strong binding affinities to DNA, EGFR and VEGFR-2 receptors. None of the active compounds showed cytotoxicity against human red blood cells.
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Affiliation(s)
- Viviana Cuartas
- Heterocyclic Compounds Research Group, Department of Chemistry, Universidad del Valle A.A. 25360 Cali Colombia +57-2339-3248 +57-315-484-6665.,Center for Bioinformatics and Photonics-CIBioFI A.A. 25360 Cali Colombia
| | - Alberto Aragón-Muriel
- Laboratorio de Investigación en Catálisis y Procesos (LICAP), Departamento de Química, Universidad del Valle Cali 760001 Colombia
| | - Yamil Liscano
- Grupo de Investigación en Química y Biotecnología (QUIBIO), Universidad Santiago de Cali Cali 760035 Colombia
| | - Dorian Polo-Cerón
- Laboratorio de Investigación en Catálisis y Procesos (LICAP), Departamento de Química, Universidad del Valle Cali 760001 Colombia
| | - Maria Del Pilar Crespo-Ortiz
- Grupo de Biotecnología e Infecciones Bacterianas, Departamento de Microbiología, Universidad del Valle Cali 760043 Colombia
| | - Jairo Quiroga
- Heterocyclic Compounds Research Group, Department of Chemistry, Universidad del Valle A.A. 25360 Cali Colombia +57-2339-3248 +57-315-484-6665
| | - Rodrigo Abonia
- Heterocyclic Compounds Research Group, Department of Chemistry, Universidad del Valle A.A. 25360 Cali Colombia +57-2339-3248 +57-315-484-6665
| | - Braulio Insuasty
- Heterocyclic Compounds Research Group, Department of Chemistry, Universidad del Valle A.A. 25360 Cali Colombia +57-2339-3248 +57-315-484-6665.,Center for Bioinformatics and Photonics-CIBioFI A.A. 25360 Cali Colombia
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11
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Aragón-Muriel A, Liscano Y, Upegui Y, Robledo SM, Ramírez-Apan MT, Morales-Morales D, Oñate-Garzón J, Polo-Cerón D. In Vitro Evaluation of the Potential Pharmacological Activity and Molecular Targets of New Benzimidazole-Based Schiff Base Metal Complexes. Antibiotics (Basel) 2021; 10:728. [PMID: 34208759 PMCID: PMC8235109 DOI: 10.3390/antibiotics10060728] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 12/11/2022] Open
Abstract
Metal-based drugs, including lanthanide complexes, have been extremely effective in clinical treatments against various diseases and have raised major interest in recent decades. Hence, in this work, a series of lanthanum (III) and cerium (III) complexes, including Schiff base ligands derived from (1H-benzimidazol-2-yl)aniline, salicylaldehyde, and 2,4-dihydroxybenzaldehyde were synthesized and characterized using different spectroscopic methods. Besides their cytotoxic activities, they were examined in human U-937 cells, primate kidney non-cancerous COS-7, and six other, different human tumor cell lines: U251, PC-3, K562, HCT-15, MCF-7, and SK-LU-1. In addition, the synthesized compounds were screened for in vitro antiparasitic activity against Leishmania braziliensis, Plasmodium falciparum, and Trypanosoma cruzi. Additionally, antibacterial activities were examined against two Gram-positive strains (S. aureus ATCC® 25923, L. monocytogenes ATCC® 19115) and two Gram-negative strains (E. coli ATCC® 25922, P. aeruginosa ATCC® 27583) using the microdilution method. The lanthanide complexes generally exhibited increased biological activity compared with the free Schiff base ligands. Interactions between the tested compounds and model membranes were examined using differential scanning calorimetry (DSC), and interactions with calf thymus DNA (CT-DNA) were investigated by ultraviolet (UV) absorption. Molecular docking studies were performed using leishmanin (1LML), cruzain (4PI3), P. falciparum alpha-tubulin (GenBank sequence CAA34101 [453 aa]), and S.aureus penicillin-binding protein 2a (PBP2A; 5M18) as the protein receptors. The results lead to the conclusion that the synthesized compounds exhibited a notable effect on model membranes imitating mammalian and bacterial membranes and rolled along DNA strands through groove interactions. Interactions between the compounds and studied receptors depended primarily on ligand structures in the molecular docking study.
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Affiliation(s)
- Alberto Aragón-Muriel
- Laboratorio de Investigación en Catálisis y Procesos (LICAP), Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali 760001, Colombia;
| | - Yamil Liscano
- Grupo de Investigación en Química y Biotecnología (QUIBIO), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Cali 760031, Colombia; (Y.L.); (J.O.-G.)
| | - Yulieth Upegui
- PECET, Facultad de Medicina, Universidad de Antioquia, Medellín 050010, Colombia; (Y.U.); (S.M.R.)
| | - Sara M. Robledo
- PECET, Facultad de Medicina, Universidad de Antioquia, Medellín 050010, Colombia; (Y.U.); (S.M.R.)
| | - María Teresa Ramírez-Apan
- Instituto de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, Circuito Exterior, Coyoacán, México 04510, Mexico; (M.T.R.-A.); (D.M.-M.)
| | - David Morales-Morales
- Instituto de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, Circuito Exterior, Coyoacán, México 04510, Mexico; (M.T.R.-A.); (D.M.-M.)
| | - Jose Oñate-Garzón
- Grupo de Investigación en Química y Biotecnología (QUIBIO), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Cali 760031, Colombia; (Y.L.); (J.O.-G.)
| | - Dorian Polo-Cerón
- Laboratorio de Investigación en Catálisis y Procesos (LICAP), Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali 760001, Colombia;
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12
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Wu H, Xu P, Huang Y, Wang L, Ye X, Huang X, Ma L, Zhou C. PCL-1, a Trypsin-Resistant Peptide, Exerts Potent Activity Against Drug-Resistant Bacteria. Probiotics Antimicrob Proteins 2021; 13:1467-1480. [PMID: 34037941 DOI: 10.1007/s12602-021-09801-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2021] [Indexed: 10/21/2022]
Abstract
Antimicrobial peptides (AMPs), which hold tremendous promise in overcoming the emergence of drug resistance, are limited in wide clinical applications due to their instability, especially against trypsin. Herein, we designed six peptide mutants based on the cathelicidin CATHPb2, followed by screening. Pb2-1, which showed the best activity against drug-resistant bacteria among these mutants, was selected to be combined with the trypsin inhibitory loop ORB-C to obtain two hybrid peptides: PCL-1 and Pb2-1TI. Notably, both of the hybrid peptides exhibited a remarkable enhancement in trypsin resistance compared with Pb2-1. The tests showed that PCL-1 displayed broad-spectrum antimicrobial activity that was superior to that of Pb2-1TI. In addition, PCL-1 had relatively lower cytotoxicity than Pb2-1TI towards the L02 and HaCaT cell lines and negligible hemolysis, as well as tolerance to high concentrations of salt, extreme pH, and temperature variations. In vivo, PCL-1 effectively improved the survival rate of mice that were systemically infected with drug-resistant Escherichia coli through efficient bacterial clearance from the blood and organs. With regard to mode of action, PCL-1 damaged the integrity of the bacterial cell membrane and attached to the membrane surface while bound to bacterial genomic DNA to eventually kill the bacteria. Altogether, the trypsin-resistant peptide PCL-1 is expected to be a candidate for the clinical treatment of bacterial infections.
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Affiliation(s)
- Haomin Wu
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Pengfei Xu
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Ya Huang
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Liping Wang
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Xinyue Ye
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Xiaowei Huang
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Lingman Ma
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China.
| | - ChangLin Zhou
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China.
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13
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Sapkota M, Adnan Qureshi M, Arif Mahmud S, Balikosa Y, Nguyen C, Boll JM, Pellegrino MW. A nematode-derived, mitochondrial stress signaling-regulated peptide exhibits broad antibacterial activity. Biol Open 2021; 10:268320. [PMID: 34184732 PMCID: PMC8181894 DOI: 10.1242/bio.058613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 04/06/2021] [Indexed: 12/11/2022] Open
Abstract
A dramatic rise of infections with antibiotic-resistant bacterial pathogens continues to challenge the healthcare field due to the lack of effective treatment regimes. As such, there is an urgent need to develop new antimicrobial agents that can combat these multidrug-resistant superbugs. Mitochondria are central regulators of metabolism and other cellular functions, including the regulation of innate immunity pathways involved in the defense against infection. The mitochondrial unfolded protein response (UPRmt) is a stress-activated pathway that mitigates mitochondrial dysfunction through the regulation of genes that promote recovery of the organelle. In the model organism Caenorhabditis elegans, the UPRmt also mediates an antibacterial defense program that combats pathogen infection, which promotes host survival. We sought to identify and characterize antimicrobial effectors that are regulated during the UPRmt. From our search, we discovered that the antimicrobial peptide CNC-4 is upregulated during this stress response. CNC-4 belongs to the caenacin family of antimicrobial peptides, which are predominantly found in nematodes and are known to have anti-fungal properties. Here, we find that CNC-4 also possesses potent antimicrobial activity against a spectrum of bacterial species and report on its characterization. Summary: The caenacin antimicrobial peptide CNC-4 is regulated by a mitochondrial recovery pathway and exhibits broad antibacterial activity.
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Affiliation(s)
- Madhab Sapkota
- Department of Biology, University of Texas Arlington, Arlington, 76019 Texas, USA
| | | | - Siraje Arif Mahmud
- Department of Biology, University of Texas Arlington, Arlington, 76019 Texas, USA
| | - Yves Balikosa
- Department of Biology, University of Texas Arlington, Arlington, 76019 Texas, USA
| | - Charlton Nguyen
- Department of Biology, University of Texas Arlington, Arlington, 76019 Texas, USA
| | - Joseph M Boll
- Department of Biology, University of Texas Arlington, Arlington, 76019 Texas, USA
| | - Mark W Pellegrino
- Department of Biology, University of Texas Arlington, Arlington, 76019 Texas, USA
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14
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Antibacterial Activity of a Cationic Antimicrobial Peptide against Multidrug-Resistant Gram-Negative Clinical Isolates and Their Potential Molecular Targets. Molecules 2020; 25:molecules25215035. [PMID: 33142969 PMCID: PMC7663601 DOI: 10.3390/molecules25215035] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/10/2020] [Accepted: 10/24/2020] [Indexed: 12/20/2022] Open
Abstract
Antimicrobial resistance reduces the efficacy of antibiotics. Infections caused by multidrug-resistant (MDR), Gram-negative bacterial strains, such as Klebsiella pneumoniae (MDRKp) and Pseudomonas aeruginosa (MDRPa), are a serious threat to global health. However, cationic antimicrobial peptides (CAMPs) are promising as an alternative therapeutic strategy against MDR strains. In this study, the inhibitory activity of a cationic peptide, derived from cecropin D-like (ΔM2), against MDRKp and MDRPa clinical isolates, and its interaction with membrane models and bacterial genomic DNA were evaluated. In vitro antibacterial activity was determined using the broth microdilution test, whereas interactions with lipids and DNA were studied by differential scanning calorimetry and electronic absorption, respectively. A strong bactericidal effect of ΔM2 against MDR strains, with minimal inhibitory concentration (MIC) and minimal bactericidal concentrations (MBC) between 4 and 16 μg/mL, was observed. The peptide had a pronounced effect on the thermotropic behavior of the 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC)/1,2-dimyristoyl-sn-glycero-3-phosphorylglycerol (DMPG) membrane models that mimic bacterial membranes. Finally, the interaction between the peptide and genomic DNA (gDNA) showed a hyperchromic effect, which indicates that ΔM2 can denature bacterial DNA strands via the grooves.
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15
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Kumari T, Verma DP, Afshan T, Verma NK, Pant G, Ali M, Shukla PK, Mitra K, Ghosh JK. A Noncytotoxic Temporin L Analogue with In Vivo Antibacterial and Antiendotoxin Activities and a Nonmembrane-Lytic Mode of Action. ACS Infect Dis 2020; 6:2369-2385. [PMID: 32786286 DOI: 10.1021/acsinfecdis.0c00022] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Cytotoxic frog antimicrobial peptide Temporin L (TempL) is an attractive molecule for the design of lead antimicrobial agents due to its short size and versatile biological activities. However, noncytotoxic TempL variants with desirable biological activities have rarely been reported. TempL analogue Q3K,TempL is water-soluble and possesses a significant antiendotoxin property along with comparable cytotoxicity to TempL. A phenylalanine residue, located at the hydrophobic face of Q3K,TempL and the "d" position of its phenylalanine zipper sequence, was replaced with a cationic lysine residue. This analogue, Q3K,F8K,TempL, showed reduced hydrophobic moment and was noncytotoxic with lower antimicrobial activity. Interestingly, swapping between tryptophan at the fourth and serine at the sixth positions turned Q3K,F8K,TempL totally amphipathic as reflected by its helical wheel projection with clusters of hydrophobic and hydrophilic residues and the highest hydrophobic moment among these peptides. Surprisingly, this analogue, SW,Q3K,F8K,TempL, was as noncytotoxic as Q3K,F8K,TempL but showed augmented antimicrobial and antiendotoxin properties, comparable to that of TempL and Q3K,TempL. SW,Q3K,F8K,TempL exhibited appreciable survival of mice against P. aeruginosa infection and a lipopolysaccharide (LPS) challenge. Unlike TempL and Q3K,TempL, SW,Q3K,F8K,TempL adopted an unordered secondary structure in bacterial membrane mimetic lipid vesicles and did not permeabilize them or depolarize the bacterial membrane. Overall, the results demonstrate the design of a nontoxic TempL analogue that possesses clusters of hydrophobic and hydrophilic residues with impaired secondary structure and shows a nonmembrane-lytic mechanism and in vivo antiendotoxin and antimicrobial activities. This paradigm of design of antimicrobial peptide with clusters of hydrophobic and hydrophilic residues and high hydrophobic moment but low secondary structure could be attempted further.
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Affiliation(s)
- Tripti Kumari
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - Devesh Pratap Verma
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - Tayyaba Afshan
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - Neeraj Kumar Verma
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - Garima Pant
- Electron Microscopy Unit, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - Mehmood Ali
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - P. K. Shukla
- Microbiology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - Kalyan Mitra
- Electron Microscopy Unit, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
| | - Jimut Kanti Ghosh
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh 226 031, India
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16
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Liu YX, Li ZF, Lv YJ, Dong B, Fan ZC. Chlamydomonas reinhardtii-expressed multimer of Bacteriocin LS2 potently inhibits the growth of bacteria. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.05.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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17
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Wang L, Zhao X, Xia X, Zhu C, Qin W, Xu Y, Hang B, Sun Y, Chen S, Zhang H, Jiang J, Hu J, Fotina H, Zhang G. Antimicrobial Peptide JH-3 Effectively Kills Salmonella enterica Serovar Typhimurium Strain CVCC541 and Reduces Its Pathogenicity in Mice. Probiotics Antimicrob Proteins 2020; 11:1379-1390. [PMID: 31001786 DOI: 10.1007/s12602-019-09533-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Salmonella is an important zoonotic pathogen and is a major cause of gastrointestinal diseases worldwide. The current serious problem of antibiotic abuse has prompted the search for new substitutes for antibiotics. JH-3 is a small antimicrobial peptide with broad-spectrum bactericidal activity. In this study, we showed that JH-3 has good bactericidal activity towards the clinical isolate Salmonella enterica serovar Typhimurium strain CVCC541. The minimum inhibitory concentration (MIC) of JH-3 against this bacterium was determined to be 100 μg/mL, which could decrease the number of CVCC541 cells by 1000-fold in vitro within 5 h. The transmission electron microscopy (TEM) results showed that JH-3 can damage the cell wall and membrane of CVCC541, leading to the leakage of cell contents and subsequent cell death. To measure the bactericidal activity of CVCC541-infected mice were treated intraperitoneally 40 or 10 mg/kg JH-3 at 2 h or 3 days postinfection. Our results showed that treatment with 40 mg/kg JH-3 at 2 h postinfection had the best therapeutic effect and could significantly protect mice from a lethal dose of CVCC541. Furthermore, the clinical symptoms, bacterial burden in blood and organs, and intestinal pathological changes were all decreased and were close to normal. This study examined the therapeutic effect of the antimicrobial peptide JH-3 against S. enterica CVCC541 infection for the first time and determined the therapeutic effect of different JH-3 doses and treatment times, laying the foundation for studies of new antimicrobial agents.
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Affiliation(s)
- Lei Wang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China.,College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, 453003, People's Republic of China.,Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang, People's Republic of China
| | - Xueqin Zhao
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China.,Sumy National Agrarian University, Sumy, Ukraine
| | - Xiaojing Xia
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Chunling Zhu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Wanhai Qin
- Center for Experimental and Molecular Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Yanzhao Xu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Bolin Hang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Yawei Sun
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Shijun Chen
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Huihui Zhang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Jinqing Jiang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Jianhe Hu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China. .,College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, 453003, People's Republic of China.
| | - Hanna Fotina
- Sumy National Agrarian University, Sumy, Ukraine
| | - Gaiping Zhang
- Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang, People's Republic of China
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18
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Shi Y, Li C, Wang M, Chen Z, Luo Y, Xia XS, Song Y, Sun Y, Zhang AM. Cathelicidin-DM is an Antimicrobial Peptide from Duttaphrynus melanostictus and Has Wound-Healing Therapeutic Potential. ACS OMEGA 2020; 5:9301-9310. [PMID: 32363280 PMCID: PMC7191562 DOI: 10.1021/acsomega.0c00189] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/02/2020] [Indexed: 05/04/2023]
Abstract
Antimicrobial peptides (AMPs) are a class of templates with application potential for drug development. Amphibians are important sources of AMPs. Duttaphrynus melanostictus is the main source of traditional Chinese medicine "Chansu", which has anti-infection effect while without a clear mechanism. This study aimed to find the cathelicidin peptide in D. melanostictus and then investigate the activity in vivo and in vitro, and an AMP-encoding gene (cathelicidin-DM, GenBank: KJ820824.1) was obtained from the constructed cDNA library of D. melanostictus. The MIC test and SYTOX Green uptake were used for the evaluation of the bactericidal capacity and mechanisms. The serum stability tests were used for the evaluation of the application potential. The skin wound infection model and in vivo imaging were used for in vitro application of possibility evaluation. The results showed that cathelicidin-DM was a 37 amino acid AMP with good bactericidal ability, which was similar to melittin: both can kill bacteria within 15 min. Moreover, cathelicidin-DM exhibits good therapeutic potential in the mouse wound infection model, and it can be enriched to the site of infection for treatment. Thus, cathelicidin-DM could be a new template for antimicrobial drug development given its good antibacterial activity in vivo and in vitro.
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Affiliation(s)
- Yaoqiang Shi
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
| | - Chao Li
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
| | - Mei Wang
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
| | - Zijun Chen
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
| | - Ying Luo
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
| | - Xue-shan Xia
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
| | - Yuzhu Song
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
- . Phone/Fax: 86-871-65939528
| | - Yi Sun
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
- Clinical
Laboratory, First People’s Hospital
of Yunnan, Kunming, Yunnan 650032, China
- .
Phone/Fax: 86-871-65939528
| | - A-Mei Zhang
- Faculty
of Life Science and Technology, Kunming
University of Science and Technology, Kunming, Yunnan 650500, China
- Molecular
Medicine Center of Yunnan Province, Kunming, Yunnan 650032, China
- . Phone/Fax: 86-871-65939528
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19
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Gram-Negative Bacterial Lysins. Antibiotics (Basel) 2020; 9:antibiotics9020074. [PMID: 32054067 PMCID: PMC7168136 DOI: 10.3390/antibiotics9020074] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 12/13/2022] Open
Abstract
Antibiotics have had a profound impact on human society by enabling the eradication of otherwise deadly infections. Unfortunately, antibiotic use and overuse has led to the rapid spread of acquired antibiotic resistance, creating a major threat to public health. Novel therapeutic agents called bacteriophage endolysins (lysins) provide a solution to the worldwide epidemic of antibiotic resistance. Lysins are a class of enzymes produced by bacteriophages during the lytic cycle, which are capable of cleaving bonds in the bacterial cell wall, resulting in the death of the bacteria within seconds after contact. Through evolutionary selection of the phage progeny to be released and spread, these lysins target different critical components in the cell wall, making resistance to these molecules orders of magnitude less likely than conventional antibiotics. Such properties make lysins uniquely suitable for the treatment of multidrug resistant bacterial pathogens. Lysins, either naturally occurring or engineered, have the potential of being developed into fast-acting, narrow-spectrum, biofilm-disrupting antimicrobials that act synergistically with standard of care antibiotics. This review focuses on newly discovered classes of Gram-negative lysins with emphasis on prototypical enzymes that have been evaluated for efficacy against the major antibiotic resistant organisms causing nosocomial infections.
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20
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Miao X, Zhou T, Zhang J, Xu J, Guo X, Hu H, Zhang X, Hu M, Li J, Yang W, Xie J, Xu Z, Mou L. Enhanced cell selectivity of hybrid peptides with potential antimicrobial activity and immunomodulatory effect. Biochim Biophys Acta Gen Subj 2020; 1864:129532. [PMID: 31953126 DOI: 10.1016/j.bbagen.2020.129532] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/20/2019] [Accepted: 01/13/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND Hybridization is a useful strategy to bond the advantages of different peptides into novel constructions. We designed a series of AMPs based on the structures of a synthetic AMP KFA3 and a naturally-occurred host defense peptide substance P (SP) to obtain peptides retaining the high antibacterial activity of KFA3 and the immunomodulatory activity and low cytotoxicity of SP. METHODS Two repeats of KFA and different C terminal fragments of SP were hybridized, generating a series of novel AMPs (KFSP1-8). The antibacterial activities, host cell toxicity and immunomodulation were measured. The antibacterial mechanisms were investigated. RESULTS Hybrid peptides KFSP1-4 exerted substantial antibacterial activities against Gram-negative bacteria of standard strains and clinical drug-resistant isolates including E.coli, A.baumannii and P.aeruginosa, while showing little toxicity towards host cells. Compared with KFA3, moderate reduction in α-helix content and the interruption in α-helix continuality were indicated in CD spectra analysis and secondary-structure simulation in these peptides. Membrane permeabilization combined with time-kill studies and FITC-labeled imaging, indicated a selective membrane interaction of KFSP1 with bacteria cell membranes. By specially activating NK1 receptor, the hybrid peptides kept the ability of SP to induce intracellular calcium release and ERK1/2 phosphorylation, but unable to stimulate NF-κB phosphorylation. KFSP1 facilitated the survival of mouse macrophage RAW264.7, directly interacting with LPS and inhibiting the LPS-induced NF-κB phosphorylation and TNF-α expression. CONCLUSION Hybridization is a useful strategy to bond the advantages of different peptides. KFSP1 and its analogs are worth of advanced efforts to explore their potential applications as novel antimicrobial agents.
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Affiliation(s)
- Xiaokang Miao
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, PR China
| | - Tianxiong Zhou
- Institute of Biochemistry and Molecular Biology, School of Life Science Lanzhou University, Lanzhou 730000, PR China
| | - Jingying Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, PR China
| | - Jingjie Xu
- Institute of Biochemistry and Molecular Biology, School of Life Science Lanzhou University, Lanzhou 730000, PR China
| | - Xiaomin Guo
- Institute of Biochemistry and Molecular Biology, School of Life Science Lanzhou University, Lanzhou 730000, PR China
| | - Hui Hu
- Institute of Biochemistry and Molecular Biology, School of Life Science Lanzhou University, Lanzhou 730000, PR China
| | - Xiaowei Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, PR China
| | - Mingning Hu
- Institute of Biochemistry and Molecular Biology, School of Life Science Lanzhou University, Lanzhou 730000, PR China
| | - Jingyi Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, PR China
| | - Wenle Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, PR China
| | - Junqiu Xie
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, PR China
| | - Zhaoqing Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, PR China
| | - Lingyun Mou
- Institute of Biochemistry and Molecular Biology, School of Life Science Lanzhou University, Lanzhou 730000, PR China.
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21
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Zhang D, He Y, Ye Y, Ma Y, Zhang P, Zhu H, Xu N, Liang S. Little Antimicrobial Peptides with Big Therapeutic Roles. Protein Pept Lett 2019; 26:564-578. [PMID: 30799781 DOI: 10.2174/1573406415666190222141905] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/24/2019] [Accepted: 01/25/2019] [Indexed: 02/05/2023]
Abstract
Antimicrobial Peptides (AMPs) are short amphipathic biological molecules generally with less than 100 amino acids. AMPs not only present high bioactivities against bacteria, fungi or protists-induced infections, but also play important roles in anticancer activity, immune response and inflammation regulation. AMPs are classified as ribosomally synthesized, non-ribosomally synthesized and post-translationally modified, non-ribosomally synthesized ones and several synthetic or semisynthetic peptides according to their synthesis with or without the involvement of ribosomes. The molecular characterization and bioactivity action mechanisms are summarized for several ribosomally synthesized AMPs and main non-ribosomally synthesized members (cyclopeptides, lipopeptides, glycopeptides, lipoglycopeptides). We also analyze challenges and new strategies to overcome drug resistance and application limitations for AMP discovery. In conclusion, the growing novel small molecular AMPs have huge therapeutic potentials of antibacterial, antiviral, anticancer and immunoregulatory bioactivities through new techniquesdriven drug discovery strategy including bioinformatics prediction, de novo rational design and biosynthesis.
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Affiliation(s)
- Dan Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University / Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Yu He
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University / Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Yang Ye
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University / Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Yanni Ma
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University / Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Peng Zhang
- Department of Urinary Surgery, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China
| | - Hongxia Zhu
- Laboratory of Cell and Molecular Biology, State Key Laboratory of Molecular Oncology, Cancer Institute & Cancer Hospital, Chinese Academy of Medical Sciences, Beijing 100034, China
| | - Ningzhi Xu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University / Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.,Laboratory of Cell and Molecular Biology, State Key Laboratory of Molecular Oncology, Cancer Institute & Cancer Hospital, Chinese Academy of Medical Sciences, Beijing 100034, China
| | - Shufang Liang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University / Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
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22
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Meng DM, Li WJ, Shi LY, Lv YJ, Sun XQ, Hu JC, Fan ZC. Expression, purification and characterization of a recombinant antimicrobial peptide Hispidalin in Pichia pastoris. Protein Expr Purif 2019; 160:19-27. [DOI: 10.1016/j.pep.2019.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 03/17/2019] [Indexed: 10/27/2022]
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23
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Kwon JY, Kim MK, Mereuta L, Seo CH, Luchian T, Park Y. Mechanism of action of antimicrobial peptide P5 truncations against Pseudomonas aeruginosa and Staphylococcus aureus. AMB Express 2019; 9:122. [PMID: 31363941 PMCID: PMC6667604 DOI: 10.1186/s13568-019-0843-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 07/20/2019] [Indexed: 01/07/2023] Open
Abstract
Rates of microbial drug resistance are increasing worldwide; therefore, antimicrobial peptides (AMPs) are considered promising alternative therapeutic agents to antibiotics. AMPs are essential components of the innate immune system and exhibit broad-spectrum antimicrobial activity. P5 is a Cecropin A-Magainin 2 hybrid analog peptide with antimicrobial activity against Gram-negative and Gram-positive bacteria. In the present study, truncated peptides were designed to reduction length, retainment their antimicrobial activity and low toxicity at high concentrations compared with that of the parent peptide P5. The truncated peptides P5-CT1 and P5-NT1 exhibited antibacterial activities against both Gram-negative and Gram-positive bacteria. In contrast, P5-CT2, P5-CT3, P5-NT2, and P5-NT3 showed higher antibacterial activities against gram-positive bacteria compared to Gram-negative bacteria at low concentration of peptides. The truncated peptides showed lower hemolytic activity and toxic effects against mammalian cells compared with those of the parent peptide P5. The levels of several truncated peptides were maintained in the presence of physiological concentrations of salts, indicating their high stability. The results of flow cytometry, propidium iodide uptake, n-phenyl-1-naphthylamine uptake, and 3,3′-dipropylthiadicarbocyanine iodide assays showed that these truncated peptides killed microbial cells by increasing membrane permeability, thereby causing membrane damage. The results suggested that truncated peptides of P5 have good potential for use as novel antimicrobial agents.
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24
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Chen HL, Su PY, Kuo SC, Lauderdale TLY, Shih C. Adding a C-terminal Cysteine (CTC) Can Enhance the Bactericidal Activity of Three Different Antimicrobial Peptides. Front Microbiol 2018; 9:1440. [PMID: 30002652 PMCID: PMC6031733 DOI: 10.3389/fmicb.2018.01440] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 06/11/2018] [Indexed: 12/15/2022] Open
Abstract
The emergence of antibiotic-resistant bacteria has threatened our health worldwide. There is an urgent need for novel antibiotics. Previously, we identified a novel 37-mer antimicrobial peptide (AMP), HBcARD, with broad spectrum antimicrobial activity. Here, we improved the efficacy of HBcARD, by re-engineering the peptide, including the addition of a new cysteine to its C-terminus (CTC). The new 28-mer derivative, D-150-177C, contains all D-form arginines, in addition to a C-terminal cycteine. This peptide can kill antibiotic-resistant clinical isolates of Gram-negative bacteria, and is more potent than the parental HBcARD peptide in a mouse sepsis model. In another lung infection mouse model, D-150-177C showed protection efficacy against colistin-resistant Acinetobacter baumannii. Unlike colistin, we observed no acute toxicity of D-150-177C in vivo. Interestingly, we found that CTC modification could enhance the antibacterial activity of several other AMPs, such as buforinII and lysin. The potential application and mechanism of this CTC method as a general approach to improving drug efficacy, warrants further investigation in the future.
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Affiliation(s)
- Heng-Li Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Pei-Yi Su
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Shu-Chen Kuo
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Tsai-Ling Y Lauderdale
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Chiaho Shih
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
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25
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Kang W, Liu H, Ma L, Wang M, Wei S, Sun P, Jiang M, Guo M, Zhou C, Dou J. Effective antimicrobial activity of a peptide mutant Cbf-14-2 against penicillin-resistant bacteria based on its unnatural amino acids. Eur J Pharm Sci 2017; 105:169-177. [PMID: 28522372 DOI: 10.1016/j.ejps.2017.05.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/21/2017] [Accepted: 05/13/2017] [Indexed: 01/31/2023]
Abstract
Broad spectrum activities, a unique mode of actions and rare resistant variants make antimicrobial peptide (AMP) a potential alternative to antibiotics. However, AMPs still have limitations in clinical development due to their physiological stability, toxicity and manufacturing costs. Cbf-14, derived from cathelicidin-BF has been proven to be effective against drug-resistant bacteria. Herein, a series of Cbf-14 mutants were designed to overcome these limitations. Design strategies included substitutions of lysine (Lys) or leucine (Leu) with similar residues such as ornithine (Orn) and norleucine (Ile), which are unnatural amino acids, to generate AMPs with enhanced therapeutic potential. Antimicrobial activity, hemolytic activity and cytotoxicity against mouse spleen cells of the peptide mutants were investigated. Among all of the mutants, Cbf-14-2 was regarded as the most potent candidate with the amino acid sequence of RLLR-Orn-FFR-Orn-LKKSV-NH2, which exhibited a superior antimicrobial activity with a minimum inhibitory concentration (MIC) of 4-32μg/ml. Meanwhile, Cbf-14-2 displayed low levels of hemolysis in sheep red blood cells (sRBCs) and negligible cytotoxicity against mouse spleen cells, suggesting low toxicity against mammalian cells. A circular dichroism (CD) study indicated that Cbf-14-2 has a higher alpha-helix content than Cbf-14 (68.3% vs 35.1%) in SDS, which may contribute to its superior activity. Time-killing curves showed Cbf-14-2 can eliminate all tested bacteria within 240min, suggesting its rapid bactericidal effect. Transmission electron microscopy (TEM), flow cytometry and calcein release assays revealed its excellent antimicrobial potency by inducing membrane permeation and disruption. In addition, Cbf-14-2 (10mg/kg) could significantly elevate the survival rate of clinical strain infected mice, with a survival rate of 70.0%. Taken together, the data suggest that Cbf-14-2 possesses effective antimicrobial activity against penicillin-resistant bacteria in vitro and in vitro, thus rendering it as a potential anti-infective agent in clinical settings.
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Affiliation(s)
- Wei Kang
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Hanhan Liu
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Lingman Ma
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Mengxiao Wang
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Shanshan Wei
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Pengbo Sun
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Meiling Jiang
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Min Guo
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China
| | - Changlin Zhou
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China.
| | - Jie Dou
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, PR China.
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26
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Dias SA, Freire JM, Pérez-Peinado C, Domingues MM, Gaspar D, Vale N, Gomes P, Andreu D, Henriques ST, Castanho MARB, Veiga AS. New Potent Membrane-Targeting Antibacterial Peptides from Viral Capsid Proteins. Front Microbiol 2017; 8:775. [PMID: 28522994 PMCID: PMC5415599 DOI: 10.3389/fmicb.2017.00775] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 04/18/2017] [Indexed: 12/02/2022] Open
Abstract
The increasing prevalence of multidrug-resistant bacteria urges the development of new antibacterial agents. With a broad spectrum activity, antimicrobial peptides have been considered potential antibacterial drug leads. Using bioinformatic tools we have previously shown that viral structural proteins are a rich source for new bioactive peptide sequences, namely antimicrobial and cell-penetrating peptides. Here, we test the efficacy and mechanism of action of the most promising peptides among those previously identified against both Gram-positive and Gram-negative bacteria. Two cell-penetrating peptides, vCPP 0769 and vCPP 2319, have high antibacterial activity against Staphylococcus aureus, MRSA, Escherichia coli, and Pseudomonas aeruginosa, being thus multifunctional. The antibacterial mechanism of action of the two most active viral protein-derived peptides, vAMP 059 and vCPP 2319, was studied in detail. Both peptides act on both Gram-positive S. aureus and Gram-negative P. aeruginosa, with bacterial cell death occurring within minutes. Also, these peptides cause bacterial membrane permeabilization and damage of the bacterial envelope of P. aeruginosa cells. Overall, the results show that structural viral proteins are an abundant source for membrane-active peptides sequences with strong antibacterial properties.
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Affiliation(s)
- Susana A Dias
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de LisboaLisbon, Portugal
| | - João M Freire
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de LisboaLisbon, Portugal.,Department of Virology, Institut PasteurParis, France
| | - Clara Pérez-Peinado
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research ParkBarcelona, Spain
| | - Marco M Domingues
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de LisboaLisbon, Portugal
| | - Diana Gaspar
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de LisboaLisbon, Portugal
| | - Nuno Vale
- UCIBIO-REQUIMTE, Faculdade de Farmácia, Universidade do PortoPorto, Portugal
| | - Paula Gomes
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do PortoPorto, Portugal
| | - David Andreu
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research ParkBarcelona, Spain
| | - Sónia T Henriques
- Institute for Molecular Bioscience, The University of Queensland, BrisbaneQLD, Australia
| | - Miguel A R B Castanho
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de LisboaLisbon, Portugal
| | - Ana S Veiga
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de LisboaLisbon, Portugal
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27
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Kang HK, Kim C, Seo CH, Park Y. The therapeutic applications of antimicrobial peptides (AMPs): a patent review. J Microbiol 2016; 55:1-12. [PMID: 28035594 DOI: 10.1007/s12275-017-6452-1] [Citation(s) in RCA: 237] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/02/2016] [Accepted: 11/04/2016] [Indexed: 11/30/2022]
Abstract
Antimicrobial peptides (AMPs) are small molecules with a broad spectrum of antibiotic activities against bacteria, yeasts, fungi, and viruses and cytotoxic activity on cancer cells, in addition to anti-inflammatory and immunomodulatory activities. Therefore, AMPs have garnered interest as novel therapeutic agents. Because of the rapid increase in drug-resistant pathogenic microorganisms, AMPs from synthetic and natural sources have been developed using alternative antimicrobial strategies. This article presents a broad analysis of patents referring to the therapeutic applications of AMPs since 2009. The review focuses on the universal trends in the effective design, mechanism, and biological evolution of AMPs.
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Affiliation(s)
- Hee-Kyoung Kang
- Department of Biomedical Sciences, Chosun University, Gwangju, 61452, Republic of Korea
| | - Cheolmin Kim
- Department of Bioinformatics, Kongju National University, Kongju, 32588, Republic of Korea
| | - Chang Ho Seo
- Department of Bioinformatics, Kongju National University, Kongju, 32588, Republic of Korea
| | - Yoonkyung Park
- Department of Biomedical Sciences, Chosun University, Gwangju, 61452, Republic of Korea. .,Research Center for Proteinaceous Materials, Chosun University, Gwangju, 61452, Republic of Korea.
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28
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HBV maintains electrostatic homeostasis by modulating negative charges from phosphoserine and encapsidated nucleic acids. Sci Rep 2016; 6:38959. [PMID: 27958343 PMCID: PMC5154190 DOI: 10.1038/srep38959] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 11/14/2016] [Indexed: 12/22/2022] Open
Abstract
Capsid assembly and stability of hepatitis B virus (HBV) core protein (HBc) particles depend on balanced electrostatic interactions between encapsidated nucleic acids and an arginine-rich domain (ARD) of HBc in the capsid interior. Arginine-deficient ARD mutants preferentially encapsidated spliced viral RNA and shorter DNA, which can be fully or partially rescued by reducing the negative charges from acidic residues or serine phosphorylation of HBc, dose-dependently. Similarly, empty capsids without RNA encapsidation can be generated by ARD hyper-phosphorylation in insect, bacteria, and human hepatocytes. De-phosphorylation of empty capsids by phosphatase induced capsid disassembly. Empty capsids can convert into RNA-containing capsids by increasing HBc serine de-phosphorylation. In an HBV replicon system, we observed a reciprocal relationship between viral and non-viral RNA encapsidation, suggesting both non-viral RNA and serine-phosphorylation could serve as a charge balance buffer in maintaining electrostatic homeostasis. In addition, by comparing the biochemistry assay results between a replicon and a non-replicon system, we observed a correlation between HBc de-phosphorylation and viral replication. Balanced electrostatic interactions may be important to other icosahedral particles in nature.
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29
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Antimicrobial Properties of an Immunomodulator - 15 kDa Human Granulysin. PLoS One 2016; 11:e0156321. [PMID: 27276051 PMCID: PMC4898823 DOI: 10.1371/journal.pone.0156321] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 05/12/2016] [Indexed: 12/12/2022] Open
Abstract
Granulysin, a cationic protein expressed by human natural killer cells and cytotoxic T lymphocytes, is a mediator for drug-induced Stevens-Johnson syndrome and graft-versus-host disease. Some 15 kDa granulysin are processed into 9 kDa forms and sequestered in cytolytic granules, while others are constitutively secreted into body fluids. Both 9 and 15 kDa granulysin have been shown to be a serum marker for cell-mediated immunity. Furthermore, 15 kDa is able to activate monocyte differentiation. However, its antimicrobial properties have not been clearly addressed. Here, we report a novel method to prepare both the soluble 9 and 15 kDa granulysin and show that the 15 kDa form is more effective than the 9 kDa form in exerting specific antimicrobial activity against Pseudomonas aeruginosa within a range of few micromolars. We also show that the 15 kDa granulysin is able to hyperpolarize the membrane potential and increase membrane permeability of treated bacteria. Interestingly, the bactericidal activity and membrane permeability of the granulysins were markedly reduced at lower pH (pH 5.4) as a result of probable increase in hydrophobicity of the granulysins. Additionally, we’ve also shown the granulysin to inhibit biofilm formation by P. aeruginosa. These results suggest that the 15 kDa granulysin exhibits a novel mechanism in bacteria killing in a way that’s different from most antimicrobial peptides. Our novel granulysin preparation methodology will be useful for further study of action mechanisms of other antimicrobial, cytotoxic and immunomodulating properties in granulysin-mediated diseases.
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30
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Improvement of in vivo antimicrobial activity of HBcARD peptides by D-arginine replacement. Appl Microbiol Biotechnol 2016; 100:9125-9132. [PMID: 27241023 DOI: 10.1007/s00253-016-7621-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 04/11/2016] [Accepted: 05/02/2016] [Indexed: 01/25/2023]
Abstract
We previously identified a novel antimicrobial peptide with a broad spectrum bactericidal activity from human hepatitis B virus (HBV) core protein (HBc) arginine-rich domain (ARD). We compared the antimicrobial activities of HBcARD peptides from different hepadnaviruses which share similar amino acid sequences. In general, mammalian HBcARD peptides exhibited stronger antimicrobial activity than avian peptides. Using the strategy of D-amino acid substitutions, we improved the antimicrobial efficacy of human HBcARD peptide. This D-HBcARD peptide was much more resistant than L-HBcARD peptide to proteolytic degradation in vitro. Moreover, this D-HBcARD peptide maintained similar minimal bactericidal concentrations (MBC) against tested bacteria, and showed very low hemolytic activity. In the Staphylococcus aureus-infected mouse model, this D-HBcARD peptide was more protective than the L-HBcARD peptide. Repeated treatments with either L- or D-HBcARD peptides induced no significant immunogenicity. New derivatives of HBcARD peptides could serve as alternatives to the conventional antibiotics in clinical medicine in the future.
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31
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Novel Engineered Peptides of a Phage Lysin as Effective Antimicrobials against Multidrug-Resistant Acinetobacter baumannii. Antimicrob Agents Chemother 2016; 60:2671-9. [PMID: 26856847 DOI: 10.1128/aac.02972-15] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 02/05/2016] [Indexed: 12/17/2022] Open
Abstract
Acinetobacter baumannii is a Gram-negative bacterial pathogen responsible for a range of nosocomial infections. The recent rise and spread of multidrug-resistant A. baumannii clones has fueled a search for alternative therapies, including bacteriophage endolysins with potent antibacterial activities. A common feature of these lysins is the presence of a highly positively charged C-terminal domain with a likely role in promoting outer membrane penetration. In the present study, we show that the C-terminal amino acids 108 to 138 of phage lysin PlyF307, named P307, alone were sufficient to kill A. baumannii (>3 logs). Furthermore, P307 could be engineered for improved activity, the most active derivative being P307SQ-8C (>5-log kill). Both P307 and P307SQ-8C showed high in vitro activity against A. baumannii in biofilms. Moreover, P307SQ-8C exhibited MICs comparable to those of levofloxacin and ceftazidime and acted synergistically with polymyxin B. Although the peptides were shown to kill by disrupting the bacterial cytoplasmic membrane, they did not lyse human red blood cells or B cells; however, serum was found to be inhibitory to lytic activity. In a murine model of A. baumannii skin infection, P307SQ-8C reduced the bacterial burden by ∼2 logs in 2 h. This study demonstrates the prospect of using peptide derivatives from bacteriophage lysins to treat topical infections and remove biofilms caused by Gram-negative pathogens.
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Kosikowska P, Lesner A. Antimicrobial peptides (AMPs) as drug candidates: a patent review (2003-2015). Expert Opin Ther Pat 2016; 26:689-702. [PMID: 27063450 DOI: 10.1080/13543776.2016.1176149] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Antimicrobial peptides (AMPs) represent the large group of endogenous compounds widely distributed in nature. Due to their broad spectrum of antibiotic activity, as well as anti-inflammatory and immunomodulatory properties, AMPs became a model for the discovery of novel antimicrobial drugs that could answer the problem of the increasing antibiotic resistance of pathogenic microorganisms. AREAS COVERED The review represents a comprehensive analysis of patents and patent applications from the year 2003 to 2015 referring to the therapeutic use of AMPs. The article highlights the general trends in the design, potential mode of action, and methods of biological evaluation of AMPs. EXPERT OPINION The existing discord between the upcoming list of antimicrobial peptides claimed in the patents or related scientific articles as the potent drug candidates and the frequent failures of AMPs in clinical trials emphasize the need of a better understanding of their pleiotropic nature and mechanisms of host defense in general. Nevertheless, the encouraging examples of AMPs already introduced into the market, like Polymyxin or Fuzeon®, give some reason for optimism that development of AMPs as a novel class of antibiotics is still considered viable.
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Affiliation(s)
| | - Adam Lesner
- a Faculty of Chemistry , University of Gdansk , Gdansk , Poland
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He X, Zhang H, Shi Y, Gong X, Guan S, Yin H, Yang L, Yu Y, Kuai Z, Liu D, Hua R, Wang S, Shan Y. A novel antimicrobial peptide derived from membrane-proximal external region of human immunodeficiency virus type 1. Biochimie 2016; 123:110-6. [DOI: 10.1016/j.biochi.2016.02.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 02/09/2016] [Indexed: 01/28/2023]
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Abstract
This review addresses an important public health hazard affecting food safety. Antimicrobial agents are used in foods to reduce or eliminate microorganisms that cause disease. Many traditional organic compounds, novel synthetic organic agents, natural products, peptides, and proteins have been extensively studied for their effectiveness as antimicrobial agents against foodborne Campylobacter spp., Escherichia coli, Listeria spp. and Salmonella. However, antimicrobial resistance can develop in microorganisms, enhancing their ability to withstand the inhibiting or killing action of antimicrobial agents. Knowledge gaps still exist with regard to the actual chemical and microbiological mechanisms that must be identified to facilitate the search for new antimicrobial agents. Technical implementation of antimicrobial active packing films and coatings against target microorganisms must also be improved for extended product shelf life. Recent advances in antimicrobial susceptibility testing can provide researchers with new momentum to pursue their quest for a resistance panacea.
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Affiliation(s)
- Edward P C Lai
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6.
| | - Zafar Iqbal
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
| | - Tyler J Avis
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
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Li W, Jin R, Chen P, Zhao G, Li N, Wu H. Clinical correlation between HBV infection and concomitant bacterial infections. Sci Rep 2015; 5:15413. [PMID: 26634436 PMCID: PMC4669448 DOI: 10.1038/srep15413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 08/07/2015] [Indexed: 12/13/2022] Open
Abstract
Bacterial infections are common in patients suffering viral hepatitis and critical for prognosis. However, any correlation between HBV and concomitant bacterial infections is not well characterized. A retrospective study was conducted from Jan 2012 to Jan 2014 on 1333 hospitalized patients infected with bacteria. Among them, 491 HBV-infected patients were co-infected with E. coli (268), S. aureus (61), P. aeruginosa (64) or K. pneumoniae (98). A group of 300 complication-free chronically HBV-infected patients were controls. We found that HBV DNA levels were elevated in patients with each of the bacterial infections (all P < 0.05). ALT and HBeAg were strong determinants of high HBV DNA concentration. Patterns of determinants varied in infections by Gram-positive and Gram-negative bacteria. Patients with HBV DNA ≥ 2000 IU/mL had higher rates of all four concomitant bacterial infections (all P < 0.001). All types of strains isolated from HBV-positive patients showed less resistance to tested antimicrobials. The HBV DNA serum concentrations were inversely correlated to the number of ineffective antimicrobials in E. coli, P. aeruginosa and K. pneumoniae infections (P = 0.022, 0.017 and 0.016, respectively), but not S. aureus (P = 0.194). In conclusion, bacterial infections are associated with a high level of HBV replication, which, in turn, has a significant positive impact on bacterial resistance to antimicrobials. These correlations vary between Gram-negative and Gram-positive bacteria.
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Affiliation(s)
- Wei Li
- Center for Infectious Diseases, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Ronghua Jin
- Department of Administration, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Peng Chen
- Center for Infectious Diseases, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Guoxian Zhao
- Center for Infectious Diseases, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Ning Li
- Department of Administration, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Hao Wu
- Center for Infectious Diseases, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
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Lai MJ, Liu CC, Jiang SJ, Soo PC, Tu MH, Lee JJ, Chen YH, Chang KC. Antimycobacterial Activities of Endolysins Derived From a Mycobacteriophage, BTCU-1. Molecules 2015; 20:19277-90. [PMID: 26506338 PMCID: PMC6332426 DOI: 10.3390/molecules201019277] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 10/15/2015] [Accepted: 10/16/2015] [Indexed: 01/21/2023] Open
Abstract
The high incidence of Mycobacterium infection, notably multidrug-resistant M. tuberculosis infection, has become a significant public health concern worldwide. In this study, we isolate and analyze a mycobacteriophage, BTCU-1, and a foundational study was performed to evaluate the antimycobacterial activity of BTCU-1 and its cloned lytic endolysins. Using Mycobacterium smegmatis as host, a mycobacteriophage, BTCU-1, was isolated from soil in eastern Taiwan. The electron microscopy images revealed that BTCU-1 displayed morphology resembling the Siphoviridae family. In the genome of BTCU-1, two putative lytic genes, BTCU-1_ORF7 and BTCU-1_ORF8 (termed lysA and lysB, respectively), were identified, and further subcloned and expressed in Escherichia coli. When applied exogenously, both LysA and LysB were active against M. smegmatis tested. Scanning electron microscopy revealed that LysA and LysB caused a remarkable modification of the cell shape of M. smegmatis. Intracellular bactericidal activity assay showed that treatment of M. smegmatis-infected RAW 264.7 macrophages with LysA or LysB resulted in a significant reduction in the number of viable intracellular bacilli. These results indicate that the endolysins derived from BTCU-1 have antimycobacterial activity, and suggest that they are good candidates for therapeutic/disinfectant agents to control mycobacterial infections.
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Affiliation(s)
- Meng-Jiun Lai
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University, Hualien 97004, Taiwan.
| | - Chih-Chin Liu
- Department of Bioinformatics, Chung Hua University, Hsin-Chu City 97004, Taiwan.
| | - Shinn-Jong Jiang
- Department of Biochemistry, Tzu Chi University, Hualien 97004, Taiwan.
| | - Po-Chi Soo
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University, Hualien 97004, Taiwan.
| | - Meng-Hsuan Tu
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University, Hualien 97004, Taiwan.
| | - Jen-Jyh Lee
- Department of Internal Medicine, Buddhist Tzu Chi General Hospital, Hualien 97004, Taiwan.
| | - Ying-Huei Chen
- Department of Internal Medicine, Buddhist Tzu Chi General Hospital, Hualien 97004, Taiwan.
- Department of Laboratory Medicine, Buddhist Tzu Chi General Hospital, Hualien 97004, Taiwan.
| | - Kai-Chih Chang
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University, Hualien 97004, Taiwan.
- Department of Laboratory Medicine, Buddhist Tzu Chi General Hospital, Hualien 97004, Taiwan.
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Xiang A, Ren F, Lei X, Zhang J, Guo R, Lu Z, Guo Y. The hepatitis B virus (HBV) core protein enhances the transcription activation of CRE via the CRE/CREB/CBP pathway. Antiviral Res 2015; 120:7-15. [PMID: 25936964 DOI: 10.1016/j.antiviral.2015.04.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 04/16/2015] [Accepted: 04/21/2015] [Indexed: 12/21/2022]
Abstract
We previously reported that hepatitis B virus core protein (HBc) can bind to the Enhancer I (Enh I) domain and can accumulate with transcription coactivator cAMP response element (CRE). This raises the possibility that HBc may interact with CRE/CREB and regulate CRE transcription activation. In this study, we investigated the function and mechanisms of HBc in regulating CRE transcriptional activation using the HepG2 cell line. Our results showed the following: (1) HBc expression significantly increases HBV CRE transcriptional activation; (2) phosphorylation of the serine residues in the arginine-rich domain (ARD) of HBc protein impacts the function of transcriptional activation by the CRE; (3) HBc protein significantly increases HBV CRE transcriptional activation following forskolin treatment; (4) HBc nonspecifically binds to CRE and enhances the binding of the cAMP response element-binding protein (CREB) to CRE; and (5) HBc increases the concurrent accumulation of CREB and CBP at the CRE region. HBc activates Enh I through its binding to CRE, increasing the concurrent accumulation of CREB/CBP on CRE, and thus increases CRE transcriptional activation.
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Affiliation(s)
- An Xiang
- School of Pharmacology, The Fourth Military Medical University, Xi'an 710032, China
| | - Fengling Ren
- School of Public Health, Xi'an Jiaotong University, Xi'an 710061, China
| | - Xiaoying Lei
- School of Pharmacology, The Fourth Military Medical University, Xi'an 710032, China
| | - Ju Zhang
- School of Pharmacology, The Fourth Military Medical University, Xi'an 710032, China
| | - Ruijuan Guo
- School of Pharmacology, The Fourth Military Medical University, Xi'an 710032, China
| | - Zifan Lu
- School of Pharmacology, The Fourth Military Medical University, Xi'an 710032, China
| | - Yanhai Guo
- School of Pharmacology, The Fourth Military Medical University, Xi'an 710032, China
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Cationic antimicrobial peptides as potential new therapeutic agents in neonates and children: a review. Curr Opin Infect Dis 2015; 27:258-67. [PMID: 24722240 DOI: 10.1097/qco.0000000000000057] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE OF REVIEW Antimicrobial resistance towards conventional antibiotics is a serious problem for modern medicine and for our society. Multidrug-resistant bacteria are very difficult to treat and treatment options have begun to run out. Here, we summarize the newest studies of drug development using cationic antimicrobial peptides as lead molecules for novel antimicrobial drugs. RECENT FINDINGS A new development is the use of antimicrobial peptides not only as direct antimicrobial lead structures but also using their ability to influence the immune system. Such approaches can be used to develop drugs that influence the immune system in a unique way, supporting specific branches of immune cells in order to clear infection. Applying such an 'immune boost' would also minimize the danger of new resistance emerging in bacteria. In addition, searching for and testing substances that trigger the production of host antimicrobial peptides is still ongoing and opens up a totally new avenue for the use of antimicrobial peptides against infections. Currently, more than 10 clinical trials, phase 2 or 3, using antimicrobial peptides are in progress or have been recently completed. SUMMARY Multidrug resistance is an urgent problem for modern medicine and novel antimicrobials are needed. Despite some drawbacks, antimicrobial peptides seem now to appear more numerous in clinical trials, indicating the success in developing peptides into novel therapeutics. This can be critical especially for neonates and children, as treatment options for infections with Gram-negatives in neonatal ICUs are becoming rare.
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Tu J, Wu G, Zuo Y, Zhao L, Wang S. ZL-2, a cathelicidin-derived antimicrobial peptide, has a broad antimicrobial activity against gram-positive bacteria and gram-negative bacteria in vitro and in vivo. Arch Pharm Res 2015; 38:1802-9. [DOI: 10.1007/s12272-015-0565-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 01/16/2015] [Indexed: 12/23/2022]
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Huang G, Shen X, Gong Y, Dong Z, Zhao X, Shen W, Wang J, Hu F, Peng Y. Antibacterial properties of Acinetobacter baumannii phage Abp1 endolysin (PlyAB1). BMC Infect Dis 2014; 14:681. [PMID: 25495514 PMCID: PMC4274762 DOI: 10.1186/s12879-014-0681-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 12/03/2014] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Acinetobacter baumannii has emerged as one of the most important hospital-acquired pathogens in the world, because of its resistance to almost all available antibiotic drugs. Endolysins from phages are attracting increasing interest as potential antimicrobial agents, especially for drug-resistant bacteria. We previously isolated and characterized Abp1, a virulent phage targeting the multidrug-resistant A. baumannii strain, AB1. METHODS To evaluate the antimicrobial potential of endolysin from the Abp1 phage, the endolysin gene plyAB1 was cloned and over-expressed in Escherichia coli, and the lytic activity of the recombinant protein (PlyAB1) was tested by turbidity assessment and bacteria counting assays. RESULTS PlyAB1 exhibits a marked lytic activity against A. baumannii AB1, as shown by a decrease in the number of live bacteria following treatment with the enzyme. Moreover, PlyAB1 displayed a highly specific lytic effect against all of the 48 hospital-derived pandrug-resistant A. baumannii isolates that were tested. These isolates were shown to belong to different ST clones by multilocus sequence typing. CONCLUSIONS The results presented here show that PlyAB1 has potential as an antibiotic against drug-resistant A. baumannii.
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Affiliation(s)
- Guangtao Huang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, China. .,Department of Microbiology, Third Military Medical University, Chongqing, China.
| | - Xiaodong Shen
- Department of Biochemistry and Molecular Biology, Third Military Medical University, Chongqing, China.
| | - Yali Gong
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, China.
| | - Zhiwei Dong
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, China.
| | - Xia Zhao
- Department of Microbiology, Third Military Medical University, Chongqing, China.
| | - Wei Shen
- Department of Microbiology, Third Military Medical University, Chongqing, China.
| | - Jing Wang
- Department of Microbiology, Third Military Medical University, Chongqing, China.
| | - Fuquan Hu
- Department of Microbiology, Third Military Medical University, Chongqing, China.
| | - Yizhi Peng
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, China.
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Hepatitis C virus and human miR-122: insights from the bench to the clinic. Curr Opin Virol 2014; 7:11-8. [PMID: 24721497 DOI: 10.1016/j.coviro.2014.03.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 03/07/2014] [Accepted: 03/10/2014] [Indexed: 12/19/2022]
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs that function as part of RNA-induced silencing complexes that repress the expression of target genes. Over the past few years, miRNAs have been found to mediate complex regulation of a wide variety of mammalian viral infections, including Hepatitis C virus (HCV) infection. Here, we focus on a highly abundant, liver-specific miRNA, miR-122. In a unique and unusual interaction, miR-122 binds to two sites in the 5' untranslated region (UTR) of the HCV genome and promotes viral RNA accumulation. We will discuss what has been learned about this important interaction to date, provide insights into how miR-122 is able to modulate HCV RNA accumulation, and how miR-122 might be exploited for antiviral intervention.
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Nucleic acid chaperone activity associated with the arginine-rich domain of human hepatitis B virus core protein. J Virol 2013; 88:2530-43. [PMID: 24352445 DOI: 10.1128/jvi.03235-13] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
UNLABELLED Hepatitis B virus (HBV) DNA replication occurs within the HBV icosahedral core particles. HBV core protein (HBc) contains an arginine-rich domain (ARD) at its carboxyl terminus. This ARD domain of HBc 149-183 is known to be important for viral replication but not known to have a structure. Recently, nucleocapsid proteins of several viruses have been shown to contain nucleic acid chaperone activity, which can facilitate structural rearrangement of viral genome. Major features of nucleic acid chaperones include highly basic amino acid residues and flexible protein structure. To test the nucleic acid chaperone hypothesis for HBc ARD, we first used the disassembled full-length HBc from Escherichia coli to analyze the nucleic acid annealing and strand displacement activities. To exclude the potential contamination of chaperones from E. coli, we designed synthetic HBc ARD peptides with different lengths and serine phosphorylations. We demonstrated that HBc ARD peptide can behave like a bona fide nucleic acid chaperone and that the chaperone activity depends on basic residues of the ARD domain. The loss of chaperone activity by arginine-to-alanine substitutions in the ARD can be rescued by restoring basic residues in the ARD. Furthermore, the chaperone activity is subject to regulation by phosphorylation and dephosphorylation at the HBc ARD. Interestingly, the HBc ARD can enhance in vitro cleavage activity of RNA substrate by a hammerhead ribozyme. We discuss here the potential significance of the HBc ARD chaperone activity in the context of viral DNA replication, in particular, at the steps of primer translocations and circularization of linear replicative intermediates. IMPORTANCE Hepatitis B virus is a major human pathogen. At present, no effective treatment can completely eradicate the virus from patients with chronic hepatitis B. We report here a novel chaperone activity associated with the viral core protein. Our discovery could lead to a new drug design for more effective treatment against hepatitis B virus in the future.
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