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Turki F, Ben Younes R, Sakly M, Ben Rhouma K, Martinez-Guitarte JL, Amara S. Effect of silver nanoparticles on gene transcription of land snail Helix aspersa. Sci Rep 2022; 12:2078. [PMID: 35136168 PMCID: PMC8826417 DOI: 10.1038/s41598-022-06090-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 01/24/2022] [Indexed: 11/09/2022] Open
Abstract
Silver nanoparticles (Ag-NPs) are extremely useful in a diverse range of consumer goods. However, their impact on the environment is still under research, especially regarding the mechanisms involved in their effect. Aiming to provide some insight, the present work analyzes the transcriptional activity of six genes (Hsp83, Hsp17.2, Hsp19.8, SOD Cu-Zn, Mn-SOD, and BPI) in the terrestrial snail Helix aspersa in the presence of different concentrations of Ag-NPs. The animals were exposed for seven days to Lactuca sativa soaked for one hour in different concentrations of Ag-NPs (20, 50, 100 mg/L). The results revealed that the highest concentration tested of Ag-NPs (100 mg/L) led to a statistically significant induction of the Hsp83 and BPI expression in the digestive gland compared to the control group. However, a trend to upregulation with no statistical significance was observed for all the genes in the digestive gland and the foot, while in the hemolymph, the trend was to downregulation. Ag-NPs affected the stress response and immunity under the tested conditions, although the impact was weak. It is necessary to explore longer exposure times to confirm that the effect can be maintained and impact on health. Our results highlight the usefulness of the terrestrial snail Helix aspersa as a bioindicator organism for silver nanoparticle pollution biomonitoring and, in particular, the use of molecular biomarkers of pollutant effect as candidates to be included in a multi-biomarker strategy.
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Affiliation(s)
- Faten Turki
- Laboratory of Integrative Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia
| | - Ridha Ben Younes
- Research Unit of Immuno-Microbiology Environmental and Carcinogenesis, Sciences Faculty of Bizerte, University of Carthage, Bizerte, Tunisia
| | - Mohsen Sakly
- Laboratory of Integrative Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia
| | - Khemais Ben Rhouma
- Laboratory of Integrative Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia
| | - José-Luis Martinez-Guitarte
- Grupo de Biología y Toxicología Ambiental, Departamento de Física Matemática y de Fluidos, Facultad de Ciencias, UNED, c/ Paseo de la Senda del Rey 9, 28040, Madrid, Spain.
| | - Salem Amara
- Laboratory of Integrative Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia
- Department of Natural and Applied Sciences in Afif, Faculty of Sciences and Humanities, Shaqra University, Afif, 11921, Saudi Arabia
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2
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Tarantini FS, Brunati M, Taravella A, Carrano L, Parenti F, Hong KW, Williams P, Chan KG, Heeb S, Chan WC. Actinomadura graeca sp. nov.: A novel producer of the macrocyclic antibiotic zelkovamycin. PLoS One 2021; 16:e0260413. [PMID: 34847153 PMCID: PMC8631618 DOI: 10.1371/journal.pone.0260413] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 11/09/2021] [Indexed: 11/18/2022] Open
Abstract
As part of a screening programme for antibiotic-producing bacteria, a novel Actinomadura species was discovered from a soil sample collected in Santorini, Greece. Preliminary 16S rRNA gene sequence comparisons highlighted Actinomadura macra as the most similar characterised species. However, whole-genome sequencing revealed an average nucleotide identity (ANI) value of 89% with A. macra, the highest among related species. Further phenotypic and chemotaxonomic analyses confirmed that the isolate represents a previously uncharacterised species in the genus Actinomadura, for which the name Actinomadura graeca sp. nov. is proposed (type strain 32-07T). The G+C content of A. graeca 32-07 is 72.36%. The cell wall contains DL-diaminopimelic acid, intracellular sugars are glucose, ribose and galactose, the predominant menaquinone is MK-9(H6), the major cellular lipid is phosphatidylinositol and fatty acids consist mainly of hexadecanoic acid. No mycolic acid was detected. Furthermore, A. graeca 32-07 has been confirmed as a novel producer of the non-ribosomal peptide antibiotic zelkovamycin and we report herein a provisional description of the unique biosynthetic gene cluster.
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Affiliation(s)
- Francesco Saverio Tarantini
- Biodiscovery Institute, School of Pharmacy, University of Nottingham, University Park, Nottingham, United Kingdom
| | - Mara Brunati
- Fondazione Istituto Insubrico di Ricerca per la Vita (FIIRV), Gerenzano, Italy
| | - Anna Taravella
- Fondazione Istituto Insubrico di Ricerca per la Vita (FIIRV), Gerenzano, Italy
| | - Lucia Carrano
- Fondazione Istituto Insubrico di Ricerca per la Vita (FIIRV), Gerenzano, Italy
| | - Francesco Parenti
- Fondazione Istituto Insubrico di Ricerca per la Vita (FIIRV), Gerenzano, Italy
| | - Kar Wai Hong
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia
- Institute of Marine Sciences, Shantou University, Shantou, China
| | - Paul Williams
- Biodiscovery Institute, School of Life Sciences, University of Nottingham, University Park, Nottingham, United Kingdom
| | - Kok Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia
- International Genome Centre, Jiangsu University, Zhenjiang, China
| | - Stephan Heeb
- Biodiscovery Institute, School of Life Sciences, University of Nottingham, University Park, Nottingham, United Kingdom
- * E-mail: (SH); (WCC)
| | - Weng C. Chan
- Biodiscovery Institute, School of Pharmacy, University of Nottingham, University Park, Nottingham, United Kingdom
- * E-mail: (SH); (WCC)
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3
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Jiang DL, Yao CL, Hu NJ, Liu YC. Construction of a Tandem Repeat Peptide Sequence with Pepsin Cutting Sites to Produce Recombinant α-Melanocyte-Stimulating Hormone. Molecules 2021; 26:molecules26206207. [PMID: 34684787 PMCID: PMC8541268 DOI: 10.3390/molecules26206207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 11/28/2022] Open
Abstract
The production of α-melanocyte-stimulating hormone (α-MSH), a peptide hormone composed of 13 amino acids, is attempted by recombinant expression using E. coli as the host. To achieve this aim, a synthetic gene containing eight tandem repeats of msh gene (8msh) was designed for ribosomal synthesis of 8 α-MSH. The merit of the strategy is to diminish the peptide toxicity against the host cell and to achieve a higher production yield. Pepsin cleavage sites are introduced between the peptides for enzymatic proteolysis to obtain the monomeric peptide of α-MSH. The constructed plasmid was transformed into different strains of E. coli hosts, and E. coli XL1-Blue with gene 8msh revealed the highest yield of 8 α-MSH. Although 8 α-MSH was fractionalized in the insoluble pellets after cell lysis, pepsin cleavage was able to produce soluble α-MSH peptide, as analyzed and confirmed by mass spectrometry and peptide activity assays. The production of α-MSH was quantified using HPLC with a yield of 42.9 mg/L of LB culture. This study demonstrates the feasibility of producing α-MSH using recombinant expression of tandem repeat gene. The production procedure involves minimal post-treatment and processing and can be scaled up for industrial application.
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Affiliation(s)
- Dai-Lin Jiang
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan;
| | - Chao-Ling Yao
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan;
| | - Nien-Jen Hu
- Graduate Institute of Biochemistry, National Chung Hsing University, Taichung 402, Taiwan
- Correspondence: (N.-J.H.); (Y.-C.L.); Tel.: +886-(0)4-2285-3769 (Y.-C.L.)
| | - Yung-Chuan Liu
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan;
- Correspondence: (N.-J.H.); (Y.-C.L.); Tel.: +886-(0)4-2285-3769 (Y.-C.L.)
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4
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Middleton JD, Fehlman J, Sivakumar S, Stover DG, Hai T. Stress-Inducible Gene Atf3 Dictates a Dichotomous Macrophage Activity in Chemotherapy-Enhanced Lung Colonization. Int J Mol Sci 2021; 22:ijms22147356. [PMID: 34298975 PMCID: PMC8304704 DOI: 10.3390/ijms22147356] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/17/2021] [Accepted: 06/24/2021] [Indexed: 01/17/2023] Open
Abstract
Previously, we showed that chemotherapy paradoxically exacerbated cancer cell colonization at the secondary site in a manner dependent on Atf3, a stress-inducible gene, in the non-cancer host cells. Here, we present evidence that this phenotype is established at an early stage of colonization within days of cancer cell arrival. Using mouse breast cancer models, we showed that, in the wild-type (WT) lung, cyclophosphamide (CTX) increased the ability of the lung to retain cancer cells in the vascular bed. Although CTX did not change the WT lung to affect cancer cell extravasation or proliferation, it changed the lung macrophage to be pro-cancer, protecting cancer cells from death. This, combined with the initial increase in cell retention, resulted in higher lung colonization in CTX-treated than control-treated mice. In the Atf3 knockout (KO) lung, CTX also increased the ability of lung to retain cancer cells. However, the CTX-treated KO macrophage was highly cytotoxic to cancer cells, resulting in no increase in lung colonization-despite the initial increase in cell retention. In summary, the status of Atf3 dictates the dichotomous activity of macrophage: pro-cancer for CTX-treated WT macrophage but anti-cancer for the KO counterpart. This dichotomy provides a mechanistic explanation for CTX to exacerbate lung colonization in the WT but not Atf3 KO lung.
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MESH Headings
- Activating Transcription Factor 3/physiology
- Animals
- Antimicrobial Cationic Peptides/biosynthesis
- Antimicrobial Cationic Peptides/genetics
- Cell Line, Tumor
- Cyclophosphamide/pharmacology
- Cyclophosphamide/toxicity
- Gene Expression Regulation, Neoplastic/drug effects
- Genes, Reporter
- Genotype
- Humans
- Lung Neoplasms/metabolism
- Lung Neoplasms/secondary
- Macrophage Activation
- Macrophages/physiology
- Mammary Neoplasms, Experimental/drug therapy
- Mammary Neoplasms, Experimental/genetics
- Mammary Neoplasms, Experimental/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Inbred Strains
- Mice, Knockout
- Mice, Transgenic
- Neoadjuvant Therapy/adverse effects
- Neoplasm Metastasis/genetics
- Neoplasm Metastasis/physiopathology
- Neoplasm Proteins/biosynthesis
- Neoplasm Proteins/genetics
- Neoplasm Proteins/physiology
- Neoplasm Transplantation/methods
- Neoplastic Stem Cells/pathology
- Stress, Physiological/genetics
- Transendothelial and Transepithelial Migration
- Tumor Microenvironment
- Tumor-Associated Macrophages/drug effects
- Tumor-Associated Macrophages/physiology
- Cathelicidins
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Affiliation(s)
- Justin D. Middleton
- Department of Biological Chemistry and Pharmacology, College of Medicine, Ohio State University, Columbus, OH 43210, USA; (J.D.M.); (J.F.); (S.S.)
- Molecular, Cellular and Developmental Biology Program, Ohio State University, Columbus, OH 43210, USA
| | - Jared Fehlman
- Department of Biological Chemistry and Pharmacology, College of Medicine, Ohio State University, Columbus, OH 43210, USA; (J.D.M.); (J.F.); (S.S.)
| | - Subhakeertana Sivakumar
- Department of Biological Chemistry and Pharmacology, College of Medicine, Ohio State University, Columbus, OH 43210, USA; (J.D.M.); (J.F.); (S.S.)
| | - Daniel G. Stover
- Department of Internal Medicine, College of Medicine, Ohio State University, Columbus, OH 43210, USA;
| | - Tsonwin Hai
- Department of Biological Chemistry and Pharmacology, College of Medicine, Ohio State University, Columbus, OH 43210, USA; (J.D.M.); (J.F.); (S.S.)
- Molecular, Cellular and Developmental Biology Program, Ohio State University, Columbus, OH 43210, USA
- Correspondence:
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5
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Abstract
The over-prescription of antibiotics for treatment of infections is primarily to blame for the increase in bacterial resistance. Added to the problem is the slow rate at which novel antibiotics are discovered and the many processes that need to be followed to classify antimicrobials safe for medical use. Xenorhabdus spp. of the family Enterobacteriaceae, mutualistically associated with entomopathogenic nematodes of the genus Steinernema, produce a variety of antibacterial peptides, including bacteriocins, depsipeptides, xenocoumacins and PAX (peptide antimicrobial-Xenorhabdus) peptides, plus additional secondary metabolites with antibacterial and antifungal activity. The secondary metabolites of some strains are active against protozoa and a few have anti-carcinogenic properties. It is thus not surprising that nematodes invaded by a single strain of a Xenorhabdus species are not infected by other microorganisms. In this review, the antimicrobial compounds produced by Xenorhabdus spp. are listed and the gene clusters involved in synthesis of these secondary metabolites are discussed. We also review growth conditions required for increased production of antimicrobial compounds.
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Affiliation(s)
- E Booysen
- Department of Microbiology, Stellenbosch University, Stellenbosch, 7600, South Africa
| | - L M T Dicks
- Department of Microbiology, Stellenbosch University, Stellenbosch, 7600, South Africa.
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6
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Marin-Luevano SP, Rodriguez-Carlos A, Jacobo-Delgado Y, Valdez-Miramontes C, Enciso-Moreno JA, Rivas-Santiago B. Steroid hormone modulates the production of cathelicidin and human β-defensins in lung epithelial cells and macrophages promoting Mycobacterium tuberculosis killing. Tuberculosis (Edinb) 2021; 128:102080. [PMID: 33799143 DOI: 10.1016/j.tube.2021.102080] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 11/18/2022]
Abstract
Several studies have documented the interaction between the immune and endocrine systems as an effective defense strategy against tuberculosis, involving the production of several molecules and immunological processes. In this study, we determined the effect of cortisol and dehydroepiandrosterone (DHEA) on the production of antimicrobial peptides such as cathelicidin and human β-defensin (HBD) -2, and HBD-3 and their effect on intracellular growth of Mycobacterium tuberculosis (Mtb) in lung epithelial cells and macrophages. Our results showed that DHEA promotes the production of these antimicrobial peptides in infected cells, correlating with the decrease of Mtb bacilli loads. These results suggest the use of exogenous DHEA as an adjuvant for tuberculosis therapy.
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Affiliation(s)
- Sara P Marin-Luevano
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico; Center for Research in Health Sciences and Biomedicine, Autonomous University of San Luis Potosí, Mexico
| | - Adrian Rodriguez-Carlos
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | - Yolanda Jacobo-Delgado
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | | | - Jose A Enciso-Moreno
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | - Bruno Rivas-Santiago
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico.
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7
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Bandeira PT, Vernal J, Matos GM, Farias ND, Terenzi H, Pinto AR, Barracco MA, Rosa RD. A Type IIa crustin from the pink shrimp Farfantepenaeus paulensis (crusFpau) is constitutively synthesized and stored by specific granule-containing hemocyte subpopulations. Fish Shellfish Immunol 2020; 97:294-299. [PMID: 31863905 DOI: 10.1016/j.fsi.2019.12.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/13/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
Crustins are cysteine-rich antimicrobial peptides (AMPs) widely distributed across crustaceans. From the four described crustin Types (I to IV), crustins from the subtype IIa are the most abundant and diverse members found in penaeid shrimp. Despite the critical role of Type IIa crustins in shrimp antimicrobial defenses, there is still limited information about their synthesis and antimicrobial properties. Here, we report the subcellular localization and the antibacterial spectrum of crusFpau, a Type IIa crustin from the pink shrimp Farfantepenaeus paulensis. The recombinantly expressed crusFpau showed antimicrobial activity against both Gram-positive and Gram-negative bacteria at low concentrations. Results from immunofluorescence using anti-rcrusFpau antiserum revealed that crusFpau is synthetized and stored by both granular and semigranular hemocytes, but not by hyaline cells. Interestingly, not all granular and semigranular hemocytes stained for crusFpau, revealing that this crustin is produced by specific granule-containing hemocyte subpopulations. Finally, we showed that the granule-stored peptides are not constitutively secreted into the plasma of healthy animals.
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Affiliation(s)
- Paula Terra Bandeira
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Javier Vernal
- Center for Structural Molecular Biology, Department of Biochemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Gabriel Machado Matos
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Natanael Dantas Farias
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Hernán Terenzi
- Center for Structural Molecular Biology, Department of Biochemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Aguinaldo Roberto Pinto
- Laboratory of Applied Immunology, Department of Microbiology, Immunology and Parasitology, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Margherita Anna Barracco
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Rafael Diego Rosa
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil.
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8
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Liu Q, Liu Q, Meng H, Lv H, Liu Y, Liu J, Wang H, He L, Qin J, Wang Y, Dai Y, Otto M, Li M. Staphylococcus epidermidis Contributes to Healthy Maturation of the Nasal Microbiome by Stimulating Antimicrobial Peptide Production. Cell Host Microbe 2020; 27:68-78.e5. [PMID: 31866425 PMCID: PMC10988655 DOI: 10.1016/j.chom.2019.11.003] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 08/19/2019] [Accepted: 11/07/2019] [Indexed: 12/18/2022]
Abstract
The composition of the human microbiome profoundly impacts human well-being. However, the mechanisms underlying microbiome maturation are poorly understood. The nasal microbiome is of particular importance as a source of many respiratory infections. Here, we performed a large sequencing and culture-based analysis of the human nasal microbiota from different age groups. We observed a significant decline of pathogenic bacteria before adulthood, with an increase of the commensal Staphylococcus epidermidis. In seniors, this effect was partially reversed. In vitro, many S. epidermidis isolates stimulated nasal epithelia to produce antimicrobial peptides, killing pathogenic competitors, while S. epidermidis itself proved highly resistant owing to its exceptional capacity to form biofilms. Furthermore, S. epidermidis isolates with high antimicrobial peptide-inducing and biofilm-forming capacities outcompeted pathogenic bacteria during nasal colonization in vivo. Our study identifies a pivotal role of S. epidermidis in healthy maturation of the nasal microbiome, which is achieved at least in part by symbiotic cooperation with innate host defense.
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Affiliation(s)
- Qian Liu
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Qingyun Liu
- Key Laboratory of Medical Molecular Virology, Ministry of Education and Health, School of Basic Medical Sciences, Shanghai Public Health Clinical Center, Fudan University, Shanghai 200032, China
| | - Hongwei Meng
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Huiying Lv
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Yao Liu
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Junlan Liu
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Hua Wang
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Lei He
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Juanxiu Qin
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Yanan Wang
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Yingxin Dai
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Michael Otto
- Pathogen Molecular Genetics Section, Laboratory of Bacteriology, National Institute of Allergy and Infectious Diseases, U.S. National Institutes of Health, Bethesda, MD 20814, USA.
| | - Min Li
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China.
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9
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Abstract
We have demonstrated that the simple and low-cost microbioreactor can speed up the bioprocessing techniques by using small amount of reagents and very few seed cultures to give results comparable with those obtained from the shake flask. The microbioreactor has the potential of replacing the normal conventional-scale process and offers a high-throughput efficient and analytical technique in addressing some of the challenges encountered in bioprocessing starting that includes bacterial growth and secondary metabolites production targeting the discovery of new antibacterial peptides. In our case studies, we proved that microbes were capable of growing in the microbioreactor and the production of microbial secondary metabolites (i.e., peptides) was detectable in HPLC-DAD-MS. We used QTOF-MS/MS to detect the production of peptides in the microbial culture. The purified peptides were characterized using 1D and 2D NMR, QTOF-MS/MS, and Marfey's analysis.
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Affiliation(s)
- Zeinab G Khalil
- Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia
| | - Angela A Salim
- Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia
| | - Robert J Capon
- Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia.
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10
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Yang W, Liu C, Xu Q, Qu C, Lv X, Li H, Wu Z, Li M, Yi Q, Wang L, Song L. A novel nuclear factor Akirin regulating the expression of antimicrobial peptides in Chinese mitten crab Eriocheir sinensis. Dev Comp Immunol 2019; 101:103451. [PMID: 31306698 DOI: 10.1016/j.dci.2019.103451] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Akirin, a recently discovered nuclear factor, participates in regulating various processes, including cell proliferation and differentiation, embryonic development, and immunity. In the present study, a novel Akirin was identified from Chinese mitten crab Eriocheir sinensis (designated as EsAkirin), and its primary functions in regulating antimicrobial peptides were explored. The open reading frame of EsAkirin was of 615 bp, encoding a polypeptide of 204 amino acid residues. The deduced amino acid sequence of EsAkirin shared high similarities ranging from 44.1% to 89.2% with other Akirins. In the phylogenetic tree, EsAkirin was firstly clustered with Akirins from shrimp and then assigned into the invertebrate branch. The mRNA transcripts of EsAkirin were constitutively expressed in all the tested tissues, with the highest expression level (5.07-fold compared to the stomach, p < 0.01) in hepatopancreas. The mRNA expression of EsAkirin in hemocytes was significantly increased at 6 h, and reached the maximum level at 24 h post stimulations with either lipopolysaccharide (LPS) (5.04-fold, p < 0.01) or Aeromonas hydrophila (3.10-fold, p < 0.01). After the injection of EsAkirin-dsRNA, the mRNA expressions of EsALF2, EsLYZ, EsCrus2 and EsDWD1 were significantly decreased (p < 0.01) upon LPS stimulation. EsAkirin protein was prominently distributed in the nucleus of E. sinensis hemocytes after LPS and A. hydrophila stimulations. The relative luciferase reporter system analysis revealed that the activity of nuclear factor-κB was significantly up-regulated (2.64-fold, p < 0.01) in human embryonic kidney (HEK293T) cells after the over-expression of EsAkirin. Collectively, these results suggested that EsAkirin might play an important role in the immune responses of E. sinensis by regulating the expression of antimicrobial peptides.
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Affiliation(s)
- Wen Yang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Chao Liu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Qingsong Xu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Chen Qu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Xiaojing Lv
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Huan Li
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Zhaojun Wu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Meijia Li
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Qilin Yi
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China.
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11
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Rončević T, Puizina J, Tossi A. Antimicrobial Peptides as Anti-Infective Agents in Pre-Post-Antibiotic Era? Int J Mol Sci 2019; 20:E5713. [PMID: 31739573 PMCID: PMC6887943 DOI: 10.3390/ijms20225713] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/08/2019] [Accepted: 11/11/2019] [Indexed: 02/06/2023] Open
Abstract
Resistance to antibiotics is one of the main current threats to human health and every year multi-drug resistant bacteria are infecting millions of people worldwide, with many dying as a result. Ever since their discovery, some 40 years ago, the antimicrobial peptides (AMPs) of innate defense have been hailed as a potential alternative to conventional antibiotics due to their relatively low potential to elicit resistance. Despite continued effort by both academia and start-ups, currently there are still no antibiotics based on AMPs in use. In this study, we discuss what we know and what we do not know about these agents, and what we need to know to successfully translate discovery to application. Understanding the complex mechanics of action of these peptides is the main prerequisite for identifying and/or designing or redesigning novel molecules with potent biological activity. However, other aspects also need to be well elucidated, i.e., the (bio)synthetic processes, physiological and pathological contexts of their activity, and a quantitative understanding of how physico-chemical properties affect activity. Research groups worldwide are using biological, biophysical, and algorithmic techniques to develop models aimed at designing molecules with the necessary blend of antimicrobial potency and low toxicity. Shedding light on some open questions may contribute toward improving this process.
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Affiliation(s)
- Tomislav Rončević
- Department of Biology, Faculty of Science, University of Split, 21000 Split, Croatia;
- Laboratory for Aquaculture, Institute of Oceanography and Fisheries, 21000 Split, Croatia
| | - Jasna Puizina
- Department of Biology, Faculty of Science, University of Split, 21000 Split, Croatia;
| | - Alessandro Tossi
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy;
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12
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Ohadi M, Forootanfar H, Dehghannoudeh G, Eslaminejad T, Ameri A, Shakibaie M, Adeli-Sardou M. Antimicrobial, anti-biofilm, and anti-proliferative activities of lipopeptide biosurfactant produced by Acinetobacter junii B6. Microb Pathog 2019; 138:103806. [PMID: 31629797 DOI: 10.1016/j.micpath.2019.103806] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 10/15/2019] [Accepted: 10/15/2019] [Indexed: 02/06/2023]
Abstract
Lipopeptide biosurfactants (LPBs) are amphiphilic compounds produced by microorganisms exhibiting various biological activities. The main aim of the present study was to assess the in vitro antimicrobial, anti-biofilm, and cytotoxic effects of LPB produced by Acinetobacter junii (AjL). We determined AjL minimum inhibitory concentration (MIC) against both Gram-positive and Gram-negative bacteria as well as two fungal strains. Also, the anti-biofilm activity of AjL against the biofilm produced by clinically isolated bacterial strains was investigated. The AjL non-selectively showed activity against both Gram-positive and Gram-negative bacterial strains. The obtained results of the present study exhibited that the AjL in concentrations nearly below critical micelle concentration (CMC) has an effective antibacterial activity. It was found that the MIC values of AjL were lower than standard antifungal and it exhibited nearly 100% inhibition against Candida utilis. The attained results of the biofilm formation revealed that AjL disrupted the biofilm of Proteus mirabilis, Staphylococcus aureus, and Pseudomonas aeruginosa at 1250 μg/ml and 2500 μg/ml concentrations. The attained results of cytotoxic effect (determined by WST-1 assay) of the AjL revealed IC50 of 7.8 ± 0.4 mg/ml, 2.4 ± 0.5 mg/ml, and 5.7 ± 0.1 mg/ml, against U87, KB, and HUVEC cell lines, respectively. The results indicated that AjL has a potential application in the relatively new field of biomedicine.
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Affiliation(s)
- Mandana Ohadi
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Hamid Forootanfar
- Herbal and Traditional Medicines Research Center, Kerman University of Medical Sciences, Kerman, Iran; Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran.
| | - Gholamreza Dehghannoudeh
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; Department of Pharmaceutics, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran.
| | - Touba Eslaminejad
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Atefeh Ameri
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Mojtaba Shakibaie
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Mahboubeh Adeli-Sardou
- Herbal and Traditional Medicines Research Center, Kerman University of Medical Sciences, Kerman, Iran
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13
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Chiumento S, Roblin C, Kieffer-Jaquinod S, Tachon S, Leprètre C, Basset C, Aditiyarini D, Olleik H, Nicoletti C, Bornet O, Iranzo O, Maresca M, Hardré R, Fons M, Giardina T, Devillard E, Guerlesquin F, Couté Y, Atta M, Perrier J, Lafond M, Duarte V. Ruminococcin C, a promising antibiotic produced by a human gut symbiont. Sci Adv 2019; 5:eaaw9969. [PMID: 31579822 PMCID: PMC6760926 DOI: 10.1126/sciadv.aaw9969] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 08/27/2019] [Indexed: 05/12/2023]
Abstract
A major public health challenge today is the resurgence of microbial infections caused by multidrug-resistant strains. Consequently, novel antimicrobial molecules are actively sought for development. In this context, the human gut microbiome is an under-explored potential trove of valuable natural molecules, such as the ribosomally-synthesized and post-translationally modified peptides (RiPPs). The biological activity of the sactipeptide subclass of RiPPs remains under-characterized. Here, we characterize an antimicrobial sactipeptide, Ruminococcin C1, purified from the caecal contents of rats mono-associated with Ruminococcus gnavus E1, a human symbiont. Its heterologous expression and post-translational maturation involving a specific sactisynthase establish a thioether network, which creates a double-hairpin folding. This original structure confers activity against pathogenic Clostridia and multidrug-resistant strains but no toxicity towards eukaryotic cells. Therefore, the Ruminococcin C1 should be considered as a valuable candidate for drug development and its producer strain R. gnavus E1 as a relevant probiotic for gut health enhancement.
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Affiliation(s)
- Steve Chiumento
- Univ. Grenoble Alpes, CEA, CNRS, CBM-UMR5249, 38000 Grenoble, France
| | - Clarisse Roblin
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
- ADISSEO France SAS, Centre d’Expertise et de Recherche en Nutrition, Commentry, France
| | | | - Sybille Tachon
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Chloé Leprètre
- Univ. Grenoble Alpes, CEA, CNRS, CBM-UMR5249, 38000 Grenoble, France
| | - Christian Basset
- Univ. Grenoble Alpes, CEA, CNRS, CBM-UMR5249, 38000 Grenoble, France
| | - Dwi Aditiyarini
- Univ. Grenoble Alpes, CEA, CNRS, CBM-UMR5249, 38000 Grenoble, France
| | - Hamza Olleik
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
| | | | | | - Olga Iranzo
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Marc Maresca
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Renaud Hardré
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Michel Fons
- Unité de Bioénergétique et Ingénierie des Protéines UMR7281, Institut de Microbiologie de la Méditerranée, Aix-Marseille Univ., CNRS, Marseille, France
| | - Thierry Giardina
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Estelle Devillard
- ADISSEO France SAS, Centre d’Expertise et de Recherche en Nutrition, Commentry, France
| | | | - Yohann Couté
- Univ. Grenoble Alpes, CEA, INSERM, BGE U1038, 38000 Grenoble, France
| | - Mohamed Atta
- Univ. Grenoble Alpes, CEA, CNRS, CBM-UMR5249, 38000 Grenoble, France
| | - Josette Perrier
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Mickael Lafond
- Aix-Marseille Univ., CNRS, Centrale Marseille, iSm2, Marseille, France
- Corresponding author. (M.L.); (V.D.)
| | - Victor Duarte
- Univ. Grenoble Alpes, CEA, CNRS, CBM-UMR5249, 38000 Grenoble, France
- Corresponding author. (M.L.); (V.D.)
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14
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Zhang Z, Ran C, Ding QW, Liu HL, Xie MX, Yang YL, Xie YD, Gao CC, Zhang HL, Zhou ZG. Ability of prebiotic polysaccharides to activate a HIF1α-antimicrobial peptide axis determines liver injury risk in zebrafish. Commun Biol 2019; 2:274. [PMID: 31372513 PMCID: PMC6658494 DOI: 10.1038/s42003-019-0526-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 06/21/2019] [Indexed: 12/13/2022] Open
Abstract
Natural polysaccharides have received much attention for their ability to ameliorate hepatic steatosis induced by high-fat diet. However, the potential risks of their use have been less investigated. Here, we show that the exopolysaccharides (EPS) from Lactobacillus rhamnosus GG (LGG) and L. casei BL23 reduce hepatic steatosis in zebrafish fed a high-fat diet, while BL23 EPS, but not LGG EPS, induce liver inflammation and injury. This is due to the fact that BL23 EPS induces gut microbial dysbiosis, while LGG EPS promotes microbial homeostasis. We find that LGG EPS, but not BL23 EPS, can directly activate intestinal HIF1α, and increased HIF1α boosts local antimicrobial peptide expression to facilitate microbial homeostasis, explaining the distinct compositions of LGG EPS- and BL23 EPS-associated microbiota. Finally, we find that liver injury risk is not confined to Lactobacillus-derived EPS but extends to other types of commonly used natural polysaccharides, depending on their HIF1α activation efficiency.
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Affiliation(s)
- Zhen Zhang
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Chao Ran
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Qian-wen Ding
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Hong-liang Liu
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Ming-xu Xie
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Ya-lin Yang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Ya-dong Xie
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Chen-chen Gao
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Hong-ling Zhang
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Zhi-gang Zhou
- China-Norway Joint Lab on Fish Gut Microbiota, Feed Research Institute, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
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15
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Kazemi SM, Sabatier JM. Venoms of Iranian Scorpions (Arachnida, Scorpiones) and Their Potential for Drug Discovery. Molecules 2019; 24:molecules24142670. [PMID: 31340554 PMCID: PMC6680535 DOI: 10.3390/molecules24142670] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 07/16/2019] [Accepted: 07/20/2019] [Indexed: 12/19/2022] Open
Abstract
Scorpions, a characteristic group of arthropods, are among the earliest diverging arachnids, dating back almost 440 million years. One of the many interesting aspects of scorpions is that they have venom arsenals for capturing prey and defending against predators, which may play a critical role in their evolutionary success. Unfortunately, however, scorpion envenomation represents a serious health problem in several countries, including Iran. Iran is acknowledged as an area with a high richness of scorpion species and families. The diversity of the scorpion fauna in Iran is the subject of this review, in which we report a total of 78 species and subspecies in 19 genera and four families. We also list some of the toxins or genes studied from five species, including Androctonus crassicauda, Hottentotta zagrosensis, Mesobuthus phillipsi, Odontobuthus doriae, and Hemiscorpius lepturus, in the Buthidae and Hemiscorpiidae families. Lastly, we review the diverse functions of typical toxins from the Iranian scorpion species, including their medical applications.
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Affiliation(s)
- Seyed Mahdi Kazemi
- Zagros Herpetological Institute, No 12, Somayyeh 14 Avenue, 3715688415 Qom, Iran.
| | - Jean-Marc Sabatier
- Institute of NeuroPhysiopathology, UMR 7051, Faculté de Médecine Secteur Nord, 51, Boulevard Pierre Dramard-CS80011, 13344-Marseille Cedex 15, France
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16
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Díaz-Roa A, Espinoza-Culupú A, Torres-García O, Borges MM, Avino IN, Alves FL, Miranda A, Patarroyo MA, da Silva PI, Bello FJ. Sarconesin II, a New Antimicrobial Peptide Isolated from Sarconesiopsis magellanica Excretions and Secretions. Molecules 2019; 24:E2077. [PMID: 31159162 PMCID: PMC6600161 DOI: 10.3390/molecules24112077] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/11/2019] [Accepted: 04/20/2019] [Indexed: 01/13/2023] Open
Abstract
Antibiotic resistance is at dangerous levels and increasing worldwide. The search for new antimicrobial drugs to counteract this problem is a priority for health institutions and organizations, both globally and in individual countries. Sarconesiopsis magellanica blowfly larval excretions and secretions (ES) are an important source for isolating antimicrobial peptides (AMPs). This study aims to identify and characterize a new S. magellanica AMP. RP-HPLC was used to fractionate ES, using C18 columns, and their antimicrobial activity was evaluated. The peptide sequence of the fraction collected at 43.7 min was determined by mass spectrometry (MS). Fluorescence and electronic microscopy were used to evaluate the mechanism of action. Toxicity was tested on HeLa cells and human erythrocytes; physicochemical properties were evaluated. The molecule in the ES was characterized as sarconesin II and it showed activity against Gram-negative (Escherichia coli MG1655, Pseudomonas aeruginosa ATCC 27853, P. aeruginosa PA14) and Gram-positive (Staphylococcus aureus ATCC 29213, Micrococcus luteus A270) bacteria. The lowest minimum inhibitory concentration obtained was 1.9 μM for M. luteus A270; the AMP had no toxicity in any cells tested here and its action in bacterial membrane and DNA was confirmed. Sarconesin II was documented as a conserved domain of the ATP synthase protein belonging to the Fli-1 superfamily. The data reported here indicated that peptides could be alternative therapeutic candidates for use in infections against Gram-negative and Gram-positive bacteria and eventually as a new resource of compounds for combating multidrug-resistant bacteria.
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Affiliation(s)
- Andrea Díaz-Roa
- Special Laboratory for Applied Toxinology (LETA), Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
- Institute of Biomedical Sciences, University of São Paulo, São Paulo CEP 05508-900, SP, Brazil.
- PhD Program in Biomedical and Biological Sciences, Universidad del Rosario, Bogotá 111221, Colombia.
| | - Abraham Espinoza-Culupú
- Institute of Biomedical Sciences, University of São Paulo, São Paulo CEP 05508-900, SP, Brazil.
- Bacteriology Laboratory, Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
| | | | - Monamaris M Borges
- Bacteriology Laboratory, Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
| | - Ivan N Avino
- Special Laboratory of Cell Cycle (LECC), Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
| | - Flávio L Alves
- Biophysics Department, UNIFESP, São Paulo CEP 04023-062, Brazil.
| | - Antonio Miranda
- Biophysics Department, UNIFESP, São Paulo CEP 04023-062, Brazil.
| | - Manuel A Patarroyo
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá 111321, Colombia.
- Basic Sciences Department, School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 112111, Colombia.
| | - Pedro I da Silva
- Special Laboratory for Applied Toxinology (LETA), Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
- Institute of Biomedical Sciences, University of São Paulo, São Paulo CEP 05508-900, SP, Brazil.
| | - Felio J Bello
- Faculty of Agricultural and Livestock Sciences, Veterinary Medicine Programme, Universidad de La Salle, Bogotá 110141, Colombia.
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17
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Li Y, Wang J, Li Y, Wu H, Zhao S, Yu Q. Protecting intestinal epithelial cells against deoxynivalenol and E. coli damage by recombinant porcine IL-22. Vet Microbiol 2019; 231:154-159. [PMID: 30955803 PMCID: PMC7172643 DOI: 10.1016/j.vetmic.2019.02.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 06/01/2018] [Accepted: 02/19/2019] [Indexed: 12/29/2022]
Abstract
Pigs suffer enteritis induced by pathogenic bacteria infection and toxins in the moldy feed, which cause intestinal epithelial damage and diarrhea through the whole breeding cycle. Interleukin-22 (IL-22) plays a critical role in maintaining intestinal mucosal barrier function through repairing intestinal epithelial damage. However, little was known about the effects of IL-22 against apoptosis caused by toxins and infection of intestinal pathogens in the intestinal epithelium, especially in pigs. In this study, we had successfully used prokaryotic expression system to produce recombinant porcine interleukin-22. Meanwhile, purified rIL-22 could activate STAT3 signal pathway and have been demonstrated to be safe to IPEC-J2 cells by increasing E-cadherin expression, without proinflammatory cytokines changes. Furthermore, rIL-22 reversed apoptosis induced by deoxynivalenol (DON) and played a vital part in repairing the intestinal injury. We also found that rIL-22 stimulated epithelial cells to secrete pBD-1 against enterotoxigenic E. coli (ETEC) K88 infection, as well as alleviating apoptosis ratio. This study provided a theoretical basis for curing intestinal inflammation caused by ETEC infection and epithelial apoptosis induced by DON with rIL-22 in pigs.
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Affiliation(s)
- Yunyun Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Jinquan Wang
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, 830052, PR China
| | - Yuchen Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Haiqin Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Shiyi Zhao
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Qinghua Yu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China.
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18
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Leite ML, Sampaio KB, Costa FF, Franco OL, Dias SC, Cunha NB. Molecular farming of antimicrobial peptides: available platforms and strategies for improving protein biosynthesis using modified virus vectors. AN ACAD BRAS CIENC 2018; 91:e20180124. [PMID: 30365717 DOI: 10.1590/0001-3765201820180124] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 06/07/2018] [Indexed: 11/22/2022] Open
Abstract
The constant demand for new antibiotic drugs has driven efforts by the scientific community to prospect for peptides with a broad spectrum of action. In this context, antimicrobial peptides (AMPs) have acquired great scientific importance in recent years due to their ability to possess antimicrobial and immunomodulatory activity. In the last two decades, plants have attracted the interest of the scientific community and industry as regards their potential as biofactories of heterologous proteins. One of the most promising approaches is the use of viral vectors to maximize the transient expression of drugs in the leaves of the plant Nicotiana benthamiana. Recently, the MagnifectionTM expression system was launched. This sophisticated commercial platform allows the assembly of the viral particle in leaf cells and the systemic spread of heterologous protein biosynthesis in green tissues caused by Agrobacterium tumefaciens "gene delivery method". The system also presents increased gene expression levels mediated by potent viral expression machinery. These characteristics allow the mass recovery of heterologous proteins in the leaves of N. benthamiana in 8 to 10 days. This system was highly efficient for the synthesis of different classes of pharmacological proteins and contains enormous potential for the rapid and abundant biosynthesis of AMPs.
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Affiliation(s)
- Michel L Leite
- Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
- Pós-Graduação em Ciências Genômicas e Biotecnologia, Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
| | - Kamila B Sampaio
- Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
- Pós-Graduação em Ciências Genômicas e Biotecnologia, Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
| | - Fabrício F Costa
- Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
- Cancer Biology and Epigenomics Program, Northwestern University's Feinberg School of Medicine, 60611, Chicago IL, USA
- Genomic Enterprise, 2405 N. Sheffield Av., 14088, 60614, Chicago, IL, USA
- MATTER Chicago, 222 W. Merchandise Mart Plaza, 12th Floor, 60654, Chicago, IL, USA
- The Founder Institute, 3337 El Camino Real, 94306, Palo Alto, CA USA
| | - Octávio L Franco
- Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
- Pós-Graduação em Ciências Genômicas e Biotecnologia, Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
- S-Inova Biotech, Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Av. Tamandaré, 6000, Jardim Seminário, 79117-010 Campo Grande, MS, Brazil
| | - Simoni C Dias
- Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
- Pós-Graduação em Ciências Genômicas e Biotecnologia, Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
| | - Nicolau B Cunha
- Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
- Pós-Graduação em Ciências Genômicas e Biotecnologia, Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília/UCB, SGAN 916, Modulo B, Bloco C, 70790-160 Brasilia, DF, Brazil
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19
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Wang M, Zheng K, Lin J, Huang M, Ma Y, Li S, Luo X, Wang J. Rapid and efficient production of cecropin A antibacterial peptide in Escherichia coli by fusion with a self-aggregating protein. BMC Biotechnol 2018; 18:62. [PMID: 30290795 PMCID: PMC6173929 DOI: 10.1186/s12896-018-0473-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 09/26/2018] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Cecropin A (CeA), a natural cationic antimicrobial peptide, exerts potent antimicrobial activity against a broad spectrum of Gram-positive and Gram-negative bacteria, making it an attractive candidate substitute for antimicrobials. However, the low production rate and cumbersome, expensive processes required for both its recombinant and chemical synthesis have seriously hindered the exploitation and application of CeA. Here, we utilized a short β-structured self-aggregating protein, ELK16, as a fusion partner of CeA, which allowed the efficient production of high-purity CeA antibacterial peptide with a simple inexpensive process. RESULTS In this study, three different approaches to the production of CeA peptide were investigated: an affinity tag (His-tag)-fused protein expression system (AT-HIS system), a cell-free protein expression system (CF system), and a self-assembling peptide (ELK16)-fused protein expression system (SA-ELK16 system). In the AT-HIS and CF systems, the CeA peptide was obtained with purities of 92.1% and 90.4%, respectively, using one or more affinity-chromatographic purification steps. The procedures were tedious and costly, with CeA yields of only 0.41 and 0.93 μg/mg wet cell weight, respectively. Surprisingly, in the SA-ELK16 system, about 6.2 μg/mg wet cell weight of high-purity (approximately 99.8%) CeA peptide was obtained with a simple low-cost process including steps such as centrifugation and acetic acid treatment. An antimicrobial test showed that the high-purity CeA produced in this study had the same antimicrobial activity as synthetic CeA peptide. CONCLUSIONS In this study, we designed a suitable expression system (SA-ELK16 system) for the production of the antibacterial peptide CeA and compared it with two other protein expression systems. A high yield of high-purity CeA peptide was obtained with the SA-ELK16 system, which greatly reduced the cost and time required for downstream processing. This system may provide a platform for the laboratory scale production of the CeA antibacterial peptide.
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Affiliation(s)
- Meng Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
| | - Kaiwen Zheng
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
| | - Jinglian Lin
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
| | - Minhua Huang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
| | - Yi Ma
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
| | - Shan Li
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
| | - Xiaochun Luo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
| | - Jufang Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 China
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Li H, Yin B, Wang S, Fu Q, Xiao B, Lǚ K, He J, Li C. RNAi screening identifies a new Toll from shrimp Litopenaeus vannamei that restricts WSSV infection through activating Dorsal to induce antimicrobial peptides. PLoS Pathog 2018; 14:e1007109. [PMID: 30256850 PMCID: PMC6175524 DOI: 10.1371/journal.ppat.1007109] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/08/2018] [Accepted: 09/10/2018] [Indexed: 12/21/2022] Open
Abstract
The function of Toll pathway defense against bacterial infection has been well established in shrimp, however how this pathway responds to viral infection is still largely unknown. In this study, we report the Toll4-Dorsal-AMPs cascade restricts the white spot syndrome virus (WSSV) infection of shrimp. A total of nine Tolls from Litopenaeus vannamei namely Toll1-9 are identified, and RNAi screening in vivo reveals the Toll4 is important for shrimp to oppose WSSV infection. Knockdown of Toll4 results in elevated viral loads and renders shrimp more susceptible to WSSV. Furthermore, Toll4 could be a one of upstream pattern recognition receptor (PRR) to detect WSSV, and thereby leading to nuclear translocation and phosphorylation of Dorsal, the known NF-κB transcription factor of the canonical Toll pathway. More importantly, silencing of Toll4 and Dorsal contributes to impaired expression of a specific set of antimicrobial peptides (AMPs) such as anti-LPS-factor (ALF) and lysozyme (LYZ) family, which exert potent anti-WSSV activity. Two AMPs of ALF1 and LYZ1 as representatives are demonstrated to have the ability to interact with several WSSV structural proteins to inhibit viral infection. Taken together, we therefore identify that the Toll4-Dorsal pathway mediates strong resistance to WSSV infection by inducing some specific AMPs. The TLR pathway mediated antiviral immune response is well identified in mammals, yet, Toll pathway governing this protection in invertebrates remains unknown. In the present study, we uncover that a shrimp Toll4 from a total of nine Tolls in L. vannamei confers resistance to WSSV thought inducing the NF-κB transcription factor Dorsal to inspire the production of some antimicrobial peptides (AMPs) with antiviral activity. The anti-LPS-factor (ALF) and lysozyme (LYZ) family are identified as the Toll4-Dorsal pathway targeted genes with the ability to interact with viral structural proteins in response to WSSV infection. These results suggest that the Toll receptor induces the expression of AMPs with antiviral activity could be a general antiviral mechanism in invertebrates and Toll pathway established antiviral defense could be conserved during evolution.
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Affiliation(s)
- Haoyang Li
- School of Marine Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
| | - Bin Yin
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
| | - Sheng Wang
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
| | - Qihui Fu
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
| | - Bang Xiao
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
| | - Kai Lǚ
- School of Marine Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
| | - Jianguo He
- School of Marine Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
- * E-mail: (JH); (CL)
| | - Chaozheng Li
- School of Marine Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China
- Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, P. R. China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-sen University, Guangzhou, P. R. China
- South China Sea Resource Exploitation and Protection Collaborative Innovation Center (SCS-REPIC), Sun Yat-sen University, Guangzhou, P. R. China
- * E-mail: (JH); (CL)
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Sun B, Wibowo D, Sainsbury F, Zhao CX. Design and production of a novel antimicrobial fusion protein in Escherichia coli. Appl Microbiol Biotechnol 2018; 102:8763-8772. [PMID: 30120526 DOI: 10.1007/s00253-018-9319-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 07/24/2018] [Accepted: 08/08/2018] [Indexed: 11/25/2022]
Abstract
In recent years, antimicrobial peptides (AMPs) have attracted increasing attention. The microbial cells provide a simple, cost-effective platform to produce AMPs in industrial quantities. While AMP production as fusion proteins in microorganisms is commonly used, the recovery of AMPs necessitates the use of expensive proteases and extra purification steps. Here, we develop a novel fusion protein DAMP4-F-pexiganan comprising a carrier protein DAMP4 linked to the AMP, pexiganan, through a long, flexible linker. We show that this fusion protein can be purified using a non-chromatography approach and exhibits the same antimicrobial activity as the chemically synthesized pexiganan peptide without any cleavage step. Activity of the fusion protein is dependent on a long, flexible linker between the AMP and carrier domains, as well as on the expression conditions of the fusion protein, with low-temperature expression promoting better folding of the AMP domain. The production of DAMP4-F-pexiganan circumvents the time-consuming and costly steps of chromatography-based purification and enzymatic cleavages, therefore shows considerable advantages over traditional microbial production of AMPs. We expect this novel fusion protein, and the studies on the effect of linker and expression conditions on its antimicrobial activity, will broaden the rational design and production of antimicrobial products based on AMPs.
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Affiliation(s)
- Baode Sun
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia
| | - David Wibowo
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia.
- Griffith Institute for Drug Discovery, Griffith University, QLD, Nathan, 4111, Australia.
| | - Frank Sainsbury
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia
| | - Chun-Xia Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia.
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22
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Li YX, Li BZ, Yan DZ. Upregulated expression of human cathelicidin LL-37 in hypercholesterolemia and its relationship with serum lipid levels. Mol Cell Biochem 2018; 449:73-79. [PMID: 29644526 DOI: 10.1007/s11010-018-3344-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Accepted: 02/01/2018] [Indexed: 11/26/2022]
Abstract
Dyslipidemia in patients with hypercholesterolemia has been recently linked to increased human cathelicidin LL-37 (LL-37) serum concentration. We tested a hypothesis that upregulated expression of LL-37 gene in peripheral blood leucocytes is involved in dyslipidemia in patients with hypercholesteremia. Patients with hypercholesterolemia were used in the study. Expression of LL-37 and human glyceraldehyde-3-phosphate dehydrogenase in peripheral blood leucocytes were quantified by real-time RT-PCR. Serum LL-37 concentration was estimated by enzyme-linked immunosorbent assay. Serum lipid levels were assessed by absorptiometry in all cases. Patients with hypercholesterolemia as compared to control ones were characterized by (a) an up-regulation of LL-37 gene expression in peripheral blood leucocytes with parallel increase of serum LL-37 concentration and (b) an increase of serum total and low-density lipoprotein cholesterol concentrations. Patients with hypercholesterolemia after a treatment with atorvastatin calcium 20 mg daily as compared to that patients before the treatment: an down-regulation of LL-37 gene expression in peripheral blood leucocytes with parallel decrease of serum LL-37 concentration. We also found significant correlation between serum LL-37 and high-density lipoprotein cholesterol levels (r = 0.7290, P < 0.0001). The results suggest that hypercholesterolemia is associated with an increased LL-37 gene expression in peripheral blood leucocytes. The correlation between serum LL-37 and high-density lipoprotein cholesterol levels suggests that LL-37 may play a key role in regulation of cholesterol levels in hypercholesterolemia.
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Affiliation(s)
- Yun-Xi Li
- Department of Clinical Laboratory, Guangdong Medical University Affiliated Zhongshan Hospital, Zhu Yuan Road 18, Xiaolan, 528415, Zhongshan, China.
| | - Bao-Zhen Li
- Department of Clinical Laboratory, Guangdong Medical University, Wenmingdong Road 2, Zhanjiang, 524023, China
| | - Da-Zun Yan
- Department of Clinical Laboratory, Guangdong Medical University Affiliated Zhongshan Hospital, Zhu Yuan Road 18, Xiaolan, 528415, Zhongshan, China
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23
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Cheng KT, Wu CL, Yip BS, Yu HY, Cheng HT, Chih YH, Cheng JW. High Level Expression and Purification of the Clinically Active Antimicrobial Peptide P-113 in Escherichia coli. Molecules 2018; 23:molecules23040800. [PMID: 29601518 PMCID: PMC6017664 DOI: 10.3390/molecules23040800] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/03/2018] [Accepted: 03/20/2018] [Indexed: 12/18/2022] Open
Abstract
P-113, which was originally derived from the human saliva protein histatin 5, is a histidine-rich antimicrobial peptide with the sequence AKRHHGYKRKFH. P-113 is currently undergoing phase II clinical trial as a pharmaceutical agent to fight against fungal infections in HIV patients with oral candidiasis. Previously, we developed a new procedure for the high-yield expression and purification of hG31P, an analogue and antagonist of human CXCL8. Moreover, we have successfully removed lipopolysaccharide (LPS, endotoxin) associated with hG31P in the expression with Escherichia coli. In this paper, we have used hG31P as a novel fusion protein for the expression and purification of P-113. The purity of the expressed P-113 is more than 95% and the yield is 4 mg P-113 per liter of E. coli cell culture in Luria-Bertani (LB) medium. The antimicrobial activity of the purified P-113 was tested. Furthermore, we used circular dichroism (CD) and nuclear magnetic resonance (NMR) spectroscopy to study the structural properties of P-113. Our results indicate that using hG31P as a fusion protein to obtain large quantities of P-113 is feasible and is easy to scale up for commercial production. An effective way of producing enough P-113 for future clinical studies is evident in this study.
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Affiliation(s)
- Kuang-Ting Cheng
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Chih-Lung Wu
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Bak-Sau Yip
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
- Department of Neurology, National Taiwan University Hospital, Hsinchu 300, Taiwan.
| | - Hui-Yuan Yu
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Hsi-Tsung Cheng
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Ya-Han Chih
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Jya-Wei Cheng
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
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24
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Weerawanich K, Webster G, Ma JKC, Phoolcharoen W, Sirikantaramas S. Gene expression analysis, subcellular localization, and in planta antimicrobial activity of rice (Oryza sativa L.) defensin 7 and 8. Plant Physiol Biochem 2018; 124:160-166. [PMID: 29414311 DOI: 10.1016/j.plaphy.2018.01.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 01/11/2018] [Accepted: 01/12/2018] [Indexed: 05/14/2023]
Abstract
Defensins are a group of plant antimicrobial peptides. In a previous study, it was reported that two recombinant rice (Oryza sativa L.) defensin (OsDEF) genes (OsDEF7 and OsDEF8) produced heterologously by bacteria inhibited the growth of several phytopathogen. Here, we analyzed gene expression patterns in Thai jasmine rice (O. sativa L. ssp. indica 'KDML 105') using quantitative reverse transcription-polymerase chain reaction and compared them with those in Japanese rice (O. sativa L. ssp. japonica 'Nipponbare'). Although the cultivars exhibited similar gene expression patterns at the developmental stages examined, the expression levels differed between organs. Upon Xanthomonas oryzae pv. oryzae infection in the leaves, both OsDEFs were highly upregulated at 8 days post-infection, suggesting that they play a role in pathogen defense. Moreover, in silico analyses revealed that OsDEF expression levels were affected by drought, cold, imbibition, anoxia, and dehydration stress. Using green fluorescent protein (GFP) fusions, we found that both OsDEFs were in the extracellular compartment, confirming their functions against pathogen infection. However, when recombinant OsDEFs (without GFP) were produced in tobacco BY-2 cells or Nicotiana benthamiana leaves, they could not be detected in either the culture medium or the cells. Yet, N. benthamiana leaves infiltrated with OsDEF7 or OsDEF8 constructs exhibited in planta inhibitory activity against the phytopathogen Xanthomonas campestris pv. glycines, suggesting that recombinant OsDEFs were present. Additionally, when targeting them to the ER compartment, recombinant OsDEFs could be detected. Lower inhibitory activity was observed when recombinant OsDEFs were targeted to the ER. These results suggest that OsDEFs play a role in controlling plant diseases.
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Affiliation(s)
- Kamonwan Weerawanich
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Gina Webster
- Molecular Immunology Unit, Institute for Infection and Immunity, St. George's University of London, London, UK
| | - Julian K-C Ma
- Molecular Immunology Unit, Institute for Infection and Immunity, St. George's University of London, London, UK
| | - Waranyoo Phoolcharoen
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Supaart Sirikantaramas
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand; Natural Product Biotechnology Research Unit, Chulalongkorn University, Bangkok, Thailand.
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25
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Young-Speirs M, Drouin D, Cavalcante PA, Barkema HW, Cobo ER. Host defense cathelicidins in cattle: types, production, bioactive functions and potential therapeutic and diagnostic applications. Int J Antimicrob Agents 2018; 51:813-821. [PMID: 29476808 DOI: 10.1016/j.ijantimicag.2018.02.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 02/07/2018] [Accepted: 02/11/2018] [Indexed: 12/22/2022]
Abstract
Cathelicidins are a primitive class of host defense peptides and are known for their broad-spectrum antimicrobial activity against bacteria, fungi, and enveloped viruses. These small, cationic, proteolytically-activated peptides are diverse in structure, encompassing a wide range of activities on host immune and inflammatory cell responses. The dual capacity of cathelicidins to directly control infection and regulate host defenses highlights the potential use of these peptides as alternatives to antibiotics and immunomodulators. Cathelicidins are found in many mammalian species; this review focuses on bovine cathelicidins. Eight naturally and two synthetically occurring bovine cathelicidins are described in detail, with a focus on recent advances in their expression, location and biological roles. This review also presents an overview of the bioactive functions of cathelicidins in bovine mastitis, a disease causing economic losses in cattle dairy production. Comparison of the structural, antimicrobial, cytotoxic and mechanistic properties of bovine cathelicidins advances the knowledge needed for the development of these peptides as potential identifiers of infectious diseases (e.g., bovine mastitis) and as novel therapeutic alternatives to antibiotics.
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Affiliation(s)
- Morgan Young-Speirs
- Bachelor of Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Dominique Drouin
- Bachelor of Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Paloma Araujo Cavalcante
- Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Herman W Barkema
- Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Eduardo R Cobo
- Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada.
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Abstract
Nitric oxide (NO) mediates both cellular and humoral immune responses in insects. Its mediation of cellular immune responses uses eicosanoids as a downstream signal. However, the cross-talk with two immune mediators was not known in humoral immune responses. This study focuses on cross-talk between two immune mediators in inducing gene expression of anti-microbial peptides (AMPs) of a lepidopteran insect, Spodoptera exigua. Up-regulation of eight AMPs was observed in S. exigua against bacterial challenge. However, the AMP induction was suppressed by injection of an NO synthase inhibitor, L-NAME, while little expressional change was observed on injecting its enantiomer, D-NAME. The functional association between NO biosynthesis and AMP gene expression was further supported by RNA interference (RNAi) against NO synthase (SeNOS), which suppressed AMP gene expression under the immune challenge. The AMP induction was also mimicked by NO alone because injecting an NO analog, SNAP, without bacterial challenge significantly induced the AMP gene expression. Interestingly, an eicosanoid biosynthesis inhibitor, dexamethasone (DEX), suppressed the NO induction of AMP expression. The inhibitory activity of DEX was reversed by the addition of arachidonic acid, a precursor of eicosanoid biosynthesis. AMP expression of S. exigua was also controlled by the Toll/IMD signal pathway. The RNAi of Toll receptors or Relish suppressed AMP gene expression by suppressing NO levels and subsequently reducing PLA2 enzyme activity. These results suggest that eicosanoids are a downstream signal of NO mediation of AMP expression against bacterial challenge.
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Affiliation(s)
- Md. Sadekuzzaman
- Department of Plant Medicals, Andong National University, Andong, Korea
| | - Yonggyun Kim
- Department of Plant Medicals, Andong National University, Andong, Korea
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Wang RX, Colgan SP. Special pro-resolving mediator (SPM) actions in regulating gastro-intestinal inflammation and gut mucosal immune responses. Mol Aspects Med 2017; 58:93-101. [PMID: 28232096 PMCID: PMC5797700 DOI: 10.1016/j.mam.2017.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 02/16/2017] [Indexed: 12/19/2022]
Abstract
Surfaces covered by epithelial cells, termed mucosal surfaces, serve special functions as selectively permeable barriers that partition the host and the outside world. Given its close association to microbial antigens, the intestinal mucosa has evolved creative mechanisms to maintain homeostasis, to prevent excessive inflammatory responses, and to promote rapid and full inflammatory resolution. In recent years, an active role for the epithelium has been attributed to the local generation of specialized pro-resolving mediators (SPMs) in the maintenance of immunological homeostasis. In this brief review, we highlight evidence that the epithelium actively contributes to coordination and resolution of inflammation, principally through the generation of SPMs. These autacoids are derived from omega-6 and omega-3 polyunsaturated fatty acids. Acting through widely expressed G-protein coupled receptors, SPMs are implicated in the resolution of acute inflammation that manifests specific, epithelial-directed actions focused on mucosal-homeostasis, including regulation of leukocyte trafficking, the generation of antimicrobial peptides, the dampening of endotoxin signaling, and the attenuation of mucosal cytokine responses.
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Affiliation(s)
- Ruth X Wang
- Departments of Medicine and Immunology and the Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, CO, USA
| | - Sean P Colgan
- Departments of Medicine and Immunology and the Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, CO, USA.
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28
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Glavinic U, Stankovic B, Draskovic V, Stevanovic J, Petrovic T, Lakic N, Stanimirovic Z. Dietary amino acid and vitamin complex protects honey bee from immunosuppression caused by Nosema ceranae. PLoS One 2017; 12:e0187726. [PMID: 29117233 PMCID: PMC5678887 DOI: 10.1371/journal.pone.0187726] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Accepted: 08/30/2017] [Indexed: 01/26/2023] Open
Abstract
Microsporidium Nosema ceranae is well known for exerting a negative impact on honey bee health, including down-regulation of immunoregulatory genes. Protein nutrition has been proven to have beneficial effects on bee immunity and other aspects of bee health. Bearing this in mind, the aim of our study was to evaluate the potential of a dietary amino acid and vitamin complex “BEEWELL AminoPlus” to protect honey bees from immunosuppression induced by N. ceranae. In a laboratory experiment bees were infected with N. ceranae and treated with supplement on first, third, sixth and ninth day after emergence. The expression of genes for immune-related peptides (abaecin, apidaecin, hymenoptaecin, defensin and vitellogenin) was compared between groups. The results revealed significantly lower (p<0.01 or p<0.001) numbers of Nosema spores in supplemented groups than in the control especially on day 12 post infection. With the exception of abacein, the expression levels of immune-related peptides were significantly suppressed (p<0.01 or p<0.001) in control group on the 12th day post infection, compared to bees that received the supplement. It was supposed that N. ceranae had a negative impact on bee immunity and that the tested amino acid and vitamin complex modified the expression of immune-related genes in honey bees compromised by infection, suggesting immune-stimulation that reflects in the increase in resistance to diseases and reduced bee mortality. The supplement exerted best efficacy when applied simultaneously with Nosema infection, which can help us to assume the most suitable period for its application in the hive.
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Affiliation(s)
- Uros Glavinic
- Department of Biology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
- * E-mail:
| | - Biljana Stankovic
- Laboratory for Molecular Biomedicine, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Vladimir Draskovic
- Department of Biology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
| | - Jevrosima Stevanovic
- Department of Biology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
| | - Tamas Petrovic
- Scientific Veterinary Institute “Novi Sad”, Novi Sad, Serbia
| | - Nada Lakic
- Department of Statistics, Faculty of Agriculture, University of Belgrade, Belgrade, Serbia
| | - Zoran Stanimirovic
- Department of Biology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
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29
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Manarang J, Otteson DC, McDermott AM. Expression of Antimicrobial Peptides by Uveal and Cutaneous Melanoma Cells and Investigation of Their Role in Tumor Cell Migration and Vasculogenic Mimicry. Curr Eye Res 2017; 42:1474-1481. [PMID: 28910167 PMCID: PMC6141659 DOI: 10.1080/02713683.2017.1339806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 05/30/2017] [Indexed: 01/21/2023]
Abstract
AIMS Antimicrobial peptides (AMPs) have been implicated in the pathogenesis of several cancers, although there is also evidence suggesting potential for novel, AMP-based antitumor therapies. Discerning potential roles of AMPs in tumor pathogenesis may provide valuable insight into the mechanisms of novel AMP-based antitumor therapy. METHODS mRNA expression of the AMPs α defensin (HNP-1); cathelicidin (LL-37); and β defensins (hBD-1, hBD-2, hBD-3, hBD-4) in human uveal and cutaneous melanoma cell lines, primary human uveal melanocytes, and primary human uveal melanoma cells was determined by reverse transcriptase polymerase chain reaction. An in vitro scratch assay and custom Matlab analysis were used to determine the AMP effects on melanoma cell migration. Last, the effect of specific AMPs on vasculogenic mimicry was determined by three-dimensional (3D) culture and light and fluorescence microscopy. RESULTS Low-to-moderate AMP transcript levels were detected, and these varied across the cells tested. Overall, LL-37 expression was increased while hBD-4 was decreased in most melanoma cell lines, compared to primary cultured uveal melanocytes. There was no observable influence of HNP-1 and LL-37 on tumor cell migration. Additionally, aggressive cutaneous melanoma cells grown in 3D cultures exhibited vasculogenic mimicry, although AMP exposure did not alter this process. CONCLUSIONS Collectively, our data show that although AMP mRNA expression is variable between uveal and cutaneous melanoma cells, these peptides have little influence on major characteristics that contribute to tumor aggressiveness and progression.
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Affiliation(s)
- Joseph Manarang
- College of Optometry, University of Houston, Houston, TX, USA
| | | | - Alison M. McDermott
- College of Optometry, University of Houston, 4901 Calhoun Road, Houston, TX 77204-2020, USA
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Lin CH, Pan YC, Liu FW, Chen CY. Prokaryotic expression and action mechanism of antimicrobial LsGRP1 C recombinant protein containing a fusion partner of small ubiquitin-like modifier. Appl Microbiol Biotechnol 2017; 101:8129-8138. [PMID: 28965249 DOI: 10.1007/s00253-017-8530-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/29/2017] [Accepted: 09/11/2017] [Indexed: 01/10/2023]
Abstract
Antimicrobial peptides (AMPs) are peptides exhibiting broad-spectrum antimicrobial activities and considered as potential therapeutic agents. LsGRP1C, a novel AMP derived from defense-related LsGRP1 protein of Lilium, was proven to inhibit kinds of bacteria and fungi via alteration of microbial membrane permeability and induction of fungal programmed cell death-like phenomena by in vitro assays using synthetic LsGRP1C. In this study, the prokaryotic production of LsGRP1C recombinant protein containing an N-terminal fusion partner of the yeast small ubiquitin-like modifier (SUMO) was achieved by using optimized Escherichia coli host and purification buffer system, which lead to a high yield of soluble SUMO-LsGRP1C fusion protein. In vitro assay revealed that E. coli-expressed SUMO-LsGRP1C exhibited even better antifungal activity as compared to synthetic LsGRP1C. Meanwhile, the ability of SUMO-LsGRP1C in conducting fungal membrane permeabilization and programmed cell death was verified by SYTOX Green staining and 4',6-diamidino-2-phenylindole staining/terminal deoxynucleotidyl transferase dUTP nick-end labeling assays, respectively, indicating that E. coli-expressed SUMO-LsGRP1C shares identical modes of action with synthetic LsGRP1C. Herein, this E. coli expression system enables the effective and convenient production of antimicrobial LsGRP1C in a form of SUMO-fused recombinant protein.
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Affiliation(s)
- Chia-Hua Lin
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China
| | - Ying-Chieh Pan
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China
| | - Fang-Wei Liu
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China
| | - Chao-Ying Chen
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
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31
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Jacobs CGC, Gallagher JD, Evison SEF, Heckel DG, Vilcinskas A, Vogel H. Endogenous egg immune defenses in the yellow mealworm beetle (Tenebrio molitor). Dev Comp Immunol 2017; 70:1-8. [PMID: 28034605 DOI: 10.1016/j.dci.2016.12.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 12/23/2016] [Accepted: 12/23/2016] [Indexed: 05/28/2023]
Abstract
In order to survive microbe encounters, insects rely on both physical barriers as well as local and systemic immune responses. Most research focusses on adult or larval defenses however, whereas insect eggs are also in need of protection. Lately, the defense of eggs against microbes has received an increasing amount of attention, be it through endogenous egg defenses, trans-generational immune priming (TGIP) or parental investment. Here we studied the endogenous immune response in eggs and adults of Tenebrio molitor. We show that many immune genes are induced in both adults and eggs. Furthermore, we show that eggs reach comparable levels of immune gene expression as adults. These findings show that the eggs of Tenebrio are capable of an impressive endogenous immune response, and indicate that such inducible egg defenses are likely common in insects.
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Affiliation(s)
- Chris G C Jacobs
- Max Planck Institute for Chemical Ecology, Hans-Knöll Str. 8, 07745 Jena, Germany.
| | - Joe D Gallagher
- Department of Animal and Plant Sciences, University of Sheffield, S10 2TN Sheffield, UK
| | - Sophie E F Evison
- Department of Animal and Plant Sciences, University of Sheffield, S10 2TN Sheffield, UK
| | - David G Heckel
- Max Planck Institute for Chemical Ecology, Hans-Knöll Str. 8, 07745 Jena, Germany
| | - Andreas Vilcinskas
- Institute for Insect Biotechnology, Justus Liebig University Giessen, Giessen, Germany
| | - Heiko Vogel
- Max Planck Institute for Chemical Ecology, Hans-Knöll Str. 8, 07745 Jena, Germany
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32
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Chen X, Wang H, Wang L, Zhou M, Chen T, Shaw C. Identification of Miscellaneous Peptides from the Skin Secretion of the European Edible Frog, Pelophylax kl. Esculentus. Protein J 2017; 35:291-9. [PMID: 27402449 DOI: 10.1007/s10930-016-9672-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The chemical compounds synthesised and secreted from the dermal glands of amphibian have diverse bioactivities that play key roles in the hosts' innate immune system and in causing diverse pharmacological effects in predators that may ingest the defensive skin secretions. As new biotechnological methods have developed, increasing numbers of novel peptides with novel activities have been discovered from this source of natural compounds. In this study, a number of defensive skin secretion peptide sequences were obtained from the European edible frog, P. kl. esculentus, using a 'shotgun' cloning technique developed previously within our laboratory. Some of these sequences have been previously reported but had either obtained from other species or were isolated using different methods. Two new skin peptides are described here for the first time. Esculentin-2c and Brevinin-2Tbe belong to the Esculentin-2 and Brevinin-2 families, respectively, and both are very similar to their respective analogues but with a few amino acid differences. Further, [Asn-3, Lys-6, Phe-13] 3-14-bombesin isolated previously from the skin of the marsh frog, Rana ridibunda, was identified here in the skin of P. kl. esculentus. Studies such as this can provide a rapid elucidation of peptide and corresponding DNA sequences from unstudied species of frogs and can rapidly provide a basis for related scientific studies such as those involved in systematic or the evolution of a large diverse gene family and usage by biomedical researchers as a source of potential novel drug leads or pharmacological agents.
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Affiliation(s)
- Xiaole Chen
- School of Pharmacy, Fujian Medical University, Fuzhou, Fujian, China.
| | - He Wang
- School of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, China.
| | - Lei Wang
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
| | - Mei Zhou
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
| | - Tianbao Chen
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
| | - Chris Shaw
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
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Istomina EA, Korostyleva TV, Rozhnova NA, Rogozhin EA, Pukhalskiy VA, Odintsova TI. [Genes encoding hevein-like antimicrobial peptides WAMPs: Expression in response to phytohormones and environmental factors]. Genetika 2016; 52:1300-1310. [PMID: 29372793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigated the role of genes of hevein-like antimicrobial peptides of the WAMP family in the protection of wheat plants against biotic and abiotic stress. The semiquantitative RT-PCR method was used to examine the expression of wamp genes in wheat seedlings in response to infection by pathogens and exposure to phytohormones and ions of a heavy metal ion—cadmium. We discovered that wheat germ contamination by harmful fungi significantly increases expression of genes of the wamp family, and the primary transcript is wamp-2. We determined that salicylic acid, rather than methyl jasmonate, induces expression of genes of the wamp family. We showed that abiotic stress induced by cadmium ions inhibits expression of wamp genes in the roots with no effect on their expression in shoots. The results support the protective role of wamp genes in the response of wheat plants to infections by pathogens. In turn, the resistance to abiotic stress induced by cadmium ions does not appear to be associated with expression of genes of the wamp family.
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Abstract
The oral epithelium is the site of first exposure of HIV-1 to host tissues during oral sex with an infected partner or through breast-feeding by an infected mother. Although the oral epithelium is distinguishable by its apparent resistance, the mucosal surfaces represent a primary target of HIV-1. After oral exposure and swallowing, infection is detected prominently in the gastrointestinal tract, which becomes depleted of CD4+ T-cells. The oral cavity and palatine tonsils appear to resist infection and transfer to susceptible lymphoid cells in the lamina propria by local anti-HIV-1 mechanisms. In some cases, expression of these antiviral mechanisms increases after exposure to HIV-1. During primary exposure and before seroconversion, based on limited in vitro and primate data, a window of opportunity for capture of HIV-1 by the oral epithelium may exist. After seroconversion, the risk of infectious HIV-1 appearing in saliva is negligible. This report considers evidence that oral epithelium has the potential both to enable and to resist infection by HIV-1.
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Affiliation(s)
- M C Herzberg
- Department of Diagnostic and Biological Sciences and the Mucosal and Vaccine Research Center, University of Minnesota, 17-164 Moos Tower, 515 Delaware St. SE, Minneapolis, MN 55455, USA.
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35
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Vetchinkina EM, Komakhina VV, Vysotskii DA, Zaitsev DV, Smirnov AN, Babakov AV, Komakhin RA. [Expression of plant antimicrobial peptide pro-SmAMP2 gene increases resistance of transgenic potato plants to Alternaria and Fusarium pathogens]. Genetika 2016; 52:1055-1068. [PMID: 29369560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The chickweed (Stellaria media L.) pro-SmAMP2 gene encodes the hevein-like peptides that have in vitro antimicrobial activity against certain harmful microorganisms. These peptides play an important role in protecting the chickweed plants from infection, and the pro-SmAMP2 gene was previously used to protect transgenic tobacco and Arabidopsis plants from phytopathogens. In this study, the pro-SmAMP2 gene under control of viral CaMV35S promoter or under control of its own pro-SmAMP2 promoter was transformed into cultivated potato plants of two cultivars, differing in the resistance to Alternaria: Yubiley Zhukova (resistant) and Skoroplodny (susceptible). With the help of quantitative real-time PCR, it was demonstrated that transgenic potato plants expressed the pro-SmAMP2 gene under control of both promoters at the level comparable to or exceeding the level of the potato actin gene. Assessment of the immune status of the transformants demonstrated that expression of antimicrobial peptide pro-SmAMP2 gene was able to increase the resistance to a complex of Alternaria sp. and Fusarium sp. phytopathogens only in potato plants of the Yubiley Zhukova cultivar. The possible role of the pro-SmAMP2 products in protecting potatoes from Alternaria sp. and Fusarium sp. is discussed.
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Yang H, Li S, Li F, Yu K, Yang F, Xiang J. Recombinant Expression of a Modified Shrimp Anti-Lipopolysaccharide Factor Gene in Pichia pastoris GS115 and Its Characteristic Analysis. Mar Drugs 2016; 14:md14080152. [PMID: 27517939 PMCID: PMC4999913 DOI: 10.3390/md14080152] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/22/2016] [Accepted: 07/25/2016] [Indexed: 12/20/2022] Open
Abstract
Anti-lipopolysaccharide factors (ALFs) with a LPS-binding domain (LBD) are considered to have broad spectrum antimicrobial activities and certain antiviral properties in crustaceans. FcALF2 was one isoform of ALFs isolated from the Chinese shrimp Fenneropenaeus chinensis. Our previous study showed that a modified LBD domain (named LBDv) of FcALF2 exhibited a highly enhanced antimicrobial activity. In the present study, a modified FcALF2 gene (mFcALF2), in which the LBD was substituted by LBDv, was designed and synthesized. This gene was successfully expressed in yeast Pichia pastoris GS115 eukaryotic expression system, and the characteristics of the recombinant protein mFcALF2 were analyzed. mFcALF2 exhibited apparent antibacterial activities against Gram-negative bacteria, including Escherichia coli, Vibrio alginolyticus, Vibrio harveyi, and Vibrio parahaemolyticus, and Gram-positive bacteria, including Bacillus licheniformis and Staphylococcus epidermidis. In addition, mFcALF2 could reduce the propagation of white spot syndrome virus (WSSV) in vivo by pre-incubation with virus. The present study paves the way for developing antimicrobial drugs in aquaculture.
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Affiliation(s)
- Hui Yang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Shihao Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
| | - Fuhua Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
| | - Kuijie Yu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
| | - Fusheng Yang
- Hangzhou Xiaoshan Donghai Aquaculture Company Limited, Hangzhou 311200, China.
| | - Jianhai Xiang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
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Gordya NA, Nesin AP, Simonenko NP, Chernysh SI. [REGULATION OF ANTIMICROBIAL PEPTIDE SYNTHESIS IN THE LARVAE OF CALLIPHORA VICINA (DIPTERA, CALLIPHORIDAE): DOSE-DEPENDENT EFFECT OF ECDYSTEROIDS]. Zh Evol Biokhim Fiziol 2016; 52:264-269. [PMID: 30695296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ecdysteroids are multifunctional hormones regulating virtually all morphogenetic processes in insects. Their role in stress and immune response regulation is less known. Here we studied 20-hydroxyecdysone effect on synthesis of the antimicrobial peptides in larvae of Calliphora vicina. An inverse correlation was found between 20-hydroxyecdysone titer and the concentration of antimicrobial peptides in the hemolymph of unaffected and bacteria-immunized insects. High and low doses of 20-hydroxyecdysone, injected simultaneously with bacterial cells, had an opposite effect on antimicrobial peptide synthesis in the diapausing larvae. Morphogenetically effective doses of 20-hydroxyecdysone demonstrated immuno-suppressive activity. Low doses of 20-hydroxyecdysone, on the contrary, moderately stimulated synthesis of the antimicrobial peptides. These data suggest that ecdysteroids are directly involved in regulation of the immune system activity and the final effect is dose-dependent.
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Cui P, Dong Y, Li Z, Zhang Y, Zhang S. Identification and functional characterization of an uncharacterized antimicrobial peptide from a ciliate Paramecium caudatum. Dev Comp Immunol 2016; 60:53-65. [PMID: 26883426 DOI: 10.1016/j.dci.2016.02.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 02/09/2016] [Accepted: 02/10/2016] [Indexed: 06/05/2023]
Abstract
The global ever-growing concerns about multi-drug resistant (MDR) microbes leads to urgent demands for exploration of new antibiotics including antimicrobial peptides (AMPs). Here we demonstrated that a cDNA from Ciliata Paramecium caudatum, designated Pcamp1, coded for a protein with features characteristic of AMPs, which is not homologous to any AMPs currently known. Both the C-terminal 91 amino acid residues of PcAMP1, cPcAMP1, expressed in Escherichia coli and the C-terminal 26 amino acid residues (predicted mature AMP), cPcAMP1/26, synthesized, underwent a coil-to-helix transition in the presence of TFE, SDS or DPC. Functional assays revealed that cPcAMP1 and cPcAMP1/26 were both able to kill Aeromonas hydrophila and Staphylococcus aureus. ELISA showed that cPcAMP1 and cPcAMP1/26 were able to bind to microbe-associated molecular pattern molecules LPS and LTA, which was further corroborated by the observations that cPcAMP1 could deposit onto the bacterial membranes. Importantly, both cPcAMP1 and cPcAMP1/26 were able to induce bacterial membrane permeabilization and depolarization, and to increase intracellular ROS levels. Additionally, cPcAMP1 and cPcAMP1/26 were not cytotoxic to mammalian cells. Taken together, our results show that PcAMP1 is a potential AMP with a membrane selectivity towards bacterial cells, which renders it a promising template for the design of novel peptide antibiotics against MDR microbes. It also shows that use of signal conserved sequence of AMPs can be an effective tool to identify potential AMPs across different animal classes.
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Affiliation(s)
- Pengfei Cui
- Laboratory for Evolution & Development, Institute of Evolution & Marine Biodiversity and Department of Marine Biology, Ocean University of China, Qingdao, 266003, China
| | - Yuan Dong
- Laboratory for Evolution & Development, Institute of Evolution & Marine Biodiversity and Department of Marine Biology, Ocean University of China, Qingdao, 266003, China
| | - Zhijian Li
- Laboratory for Evolution & Development, Institute of Evolution & Marine Biodiversity and Department of Marine Biology, Ocean University of China, Qingdao, 266003, China
| | - Yubo Zhang
- Laboratory for Evolution & Development, Institute of Evolution & Marine Biodiversity and Department of Marine Biology, Ocean University of China, Qingdao, 266003, China
| | - Shicui Zhang
- Laboratory for Evolution & Development, Institute of Evolution & Marine Biodiversity and Department of Marine Biology, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, China.
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Zhang Z, Zhao J, Ding L, Zou L, Li Y, Chen G, Zhang T. Constitutive expression of a novel antimicrobial protein, Hcm1, confers resistance to both Verticillium and Fusarium wilts in cotton. Sci Rep 2016; 6:20773. [PMID: 26856318 PMCID: PMC4746735 DOI: 10.1038/srep20773] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 01/12/2016] [Indexed: 12/13/2022] Open
Abstract
Fusarium and Verticillium wilts, two of the most important diseases in cotton, pose serious threats to cotton production. Here we introduced a novel antimicrobial protein Hcm1, which comprised harpin protein from Xanthomonas oryzae pv. oryzicola (Xoc), and the chimeric protein, cecropin A-melittin, into cotton. The transgenic cotton lines with stable Hcm1 expression showed a higher resistance to Verticillium and Fusarium wilts both in greenhouse and field trials compared to controls. Hcm1 enabled the transgenic cotton to produced a microscopic hypersensitive response (micro-HR), reactive oxygen species (ROS) burst, and caused the activation of pathogenesis-related (PR) genes in response to biotic stress, indicating that the transgenic cotton was in a primed state and ready to protect the host from pathogenic infection. Simultaneously, Hcm1 protein inhibited the growth of Verticillium dahliae (V. dahliae) and Fusarium oxysporum (F. oxysporum) in vitro. The spread of fungal biomass was also inhibited in vivo since the V. dahliae biomass was decreased dramatically in transgenic cotton plants after inoculation with V. dahliae. Together, these results demonstrate that Hcm1 could activate innate immunity and inhibit the growth of V. dahliae and F. oxysporum to protect cotton against Verticillium and Fusarium wilts.
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Affiliation(s)
- Zhiyuan Zhang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Jun Zhao
- National Key Laboratory of Crop Genetics & Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Lingyun Ding
- National Key Laboratory of Crop Genetics & Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Lifang Zou
- School of Agriculture and Biology, Shanghai Jiao Tong University/Key Laboratory of Urban (South) by Ministry of Agriculture, Shanghai, China
| | - Yurong Li
- School of Agriculture and Biology, Shanghai Jiao Tong University/Key Laboratory of Urban (South) by Ministry of Agriculture, Shanghai, China
| | - Gongyou Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University/Key Laboratory of Urban (South) by Ministry of Agriculture, Shanghai, China
| | - Tianzhen Zhang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing 210095, P. R. China
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Fan F, Sun H, Xu H, Liu J, Zhang H, Li Y, Ning X, Sun Y, Bai J, Fu S, Zhou C. [Expression, purification of recombinant cationic peptide AIK in Escherichia coli and its antitumor activity]. Sheng Wu Gong Cheng Xue Bao 2015; 31:1753-1763. [PMID: 27093838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIK is a novel cationic peptide with potential antitumor activity. In order to construct the AIK expression vector by Gateway technology, and establish an optimal expression and purification method for recombinant AIK, a set of primers containing AttB sites were designed and used to create the AttB-TEV-FLAG-AIR fusion gene by overlapping PCR. The resulting fusion gene was cloned into the donor vector pDONR223 by attB and attP mediated recombination (BP reaction), then, transferred into the destination vector pDESTl 5 by attL and attR mediated recombination (LR reaction). All the cloning was verified by both colony PCR and DNA sequencing. The BL21 F. coli transformed by the GST-AIR expression plasmid was used to express the GST-AIK fusion protein with IPTG induction and the induction conditions were optimized. GST-AIR fusion protein was purified by glutathione magnetic beads, followed by rTEV cleavage to remove GST tag and MTS assay to test the growth inhibition activity of the recombinant AIR on human leukemia HL-60 cells. We found that a high level of soluble expression of GST-AIK protein (more than 30% out of the total bacterial proteins) was achieved upon 0.1 mmol/L ITPG induction for 4 h at 37 °C in the transformed BL21 F. coli with starting OD₆₀₀ at 1.0. Through GST affinity purification and rTEV cleavage, the purity of the resulting recombinant AIK was greater than 95%. And the MTS assays on HL-60 cells confirmed that the recombinant AIK retains an antitumor activity at a level similar to the chemically synthesized AIK. Taken together, we have established a method for expression and purification of recombinant AIK with a potent activity against tumor cells, which will be beneficial for the large-scale production and application of recombinant AIK in the future.
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Yang H, Li S, Li F, Lv X, Xiang J. Recombinant expression and functional analysis of an isoform of anti-lipopolysaccharide factors (FcALF5) from Chinese shrimp Fenneropenaeus chinensis. Dev Comp Immunol 2015; 53:47-54. [PMID: 26123888 DOI: 10.1016/j.dci.2015.06.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/23/2015] [Accepted: 06/24/2015] [Indexed: 06/04/2023]
Abstract
Antimicrobial peptides (AMPs) have a great potential to be used as a substitute for antibiotics since AMPs don't lead to bacteria's drug resistance. Anti-lipopolysaccharide factors (ALFs) are one type of AMPs and exist in crustaceans. In the present study, we produced a recombinant protein (rFcALF5) of an ALF isoform (FcALF5) from Chinese shrimp Fenneropenaeus chinensis through a prokaryotic expression system. The rFcALF5 exhibited varied antibacterial activities against different bacteria. Besides its antibacterial activities, it could also inhibit the infection of white spot syndrome virus (WSSV) to shrimp after pre-incubation with this virus. In order to learn the antiviral mechanism on how rFcALF5 influences WSSV infection, the interaction between the total proteins of WSSV and rFcALF5 was analyzed and the data showed that rFcALF5 had direct interaction with the envelope protein VP24 of WSSV. The LPS binding domain (LBD) of FcALF5 also showed direct interaction with VP24 of WSSV. Therefore we inferred that the antiviral activity of FcALF5 might be achieved through the binding of its LBD to VP24 of WSSV. These findings provided more information to develop new strategies for the control of shrimp disease in aquaculture.
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Affiliation(s)
- Hui Yang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shihao Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; National & Local Joint Engineering Laboratory of Ecological Mariculture, Qingdao 266071, China
| | - Fuhua Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; National & Local Joint Engineering Laboratory of Ecological Mariculture, Qingdao 266071, China.
| | - Xinjia Lv
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianhai Xiang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
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Afsal K, Harishankar M, Banurekha VV, Meenakshi N, Parthasarathy RT, Selvaraj P. Effect of 1,25-dihydroxy vitamin D3 on cathelicidin expression in patients with and without cavitary tuberculosis. Tuberculosis (Edinb) 2015; 94:599-605. [PMID: 25459161 DOI: 10.1016/j.tube.2014.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 07/25/2014] [Accepted: 09/30/2014] [Indexed: 11/28/2022]
Abstract
1,25-dihydroxy vitamin D3 (1,25(OH)2D3) is a potent immuno-modulator which induces LL-37, the active peptide of cathelicidin, and restricts the growth of Mycobacterium tuberculosis (Mtb) in human macrophages. In the present study, we investigated the effect of 1,25(OH)2D3 on cathelicidin antimicrobial peptide (CAMP) expression in healthy controls (HCs) and pulmonary tuberculosis (PTB) patients. Peripheral blood mononuclear cells (PBMCs) from 50 HCs and 35 PTB patients were cultured for 72 h either with Mtb alone or Mtb with 1,25(OH)2D3 at 10(-7) M concentration. 1,25(OH)2D3 significantly up regulated the macrophage phagocytosis, CD14, CAMP gene expression and hCAP18 protein in HCs and PTB patients (p < 0.05). A significant positive correlation was observed between macrophage phagocytosis and CAMP gene expression in both the study groups (p < 0.05). Moreover, 1,25(OH)2D3 up regulated CAMP gene expression was more prominent in PTB patients without lung cavity (less severe form of disease) as compared to patients with cavitary TB (severe form of disease) (p < 0.05). The present study suggests that vitamin D may be used as an adjunct to anti-TB treatment and may be useful for a quicker recovery from less severe forms of TB disease.
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Earl SC, Rogers MT, Keen J, Bland DM, Houppert AS, Miller C, Temple I, Anderson DM, Marketon MM. Resistance to Innate Immunity Contributes to Colonization of the Insect Gut by Yersinia pestis. PLoS One 2015; 10:e0133318. [PMID: 26177454 PMCID: PMC4503695 DOI: 10.1371/journal.pone.0133318] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/25/2015] [Indexed: 01/29/2023] Open
Abstract
Yersinia pestis, the causative agent of bubonic and pneumonic plague, is typically a zoonotic vector-borne disease of wild rodents. Bacterial biofilm formation in the proventriculus of the flea contributes to chronic infection of fleas and facilitates efficient disease transmission. However prior to biofilm formation, ingested bacteria must survive within the flea midgut, and yet little is known about vector-pathogen interactions that are required for flea gut colonization. Here we establish a Drosophila melanogaster model system to gain insight into Y. pestis colonization of the insect vector. We show that Y. pestis establishes a stable infection in the anterior midgut of fly larvae, and we used this model system to study the roles of genes involved in biofilm production and/or resistance to gut immunity stressors. We find that PhoP and GmhA both contribute to colonization and resistance to antimicrobial peptides in flies, and furthermore, the data suggest biofilm formation may afford protection against antimicrobial peptides. Production of reactive oxygen species in the fly gut, as in fleas, also serves to limit bacterial infection, and OxyR mediates Y. pestis survival in both insect models. Overall, our data establish the fruit fly as an informative model to elucidate the relationship between Y. pestis and its flea vector.
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Affiliation(s)
- Shaun C. Earl
- Department of Biology, Indiana University, Bloomington, IN, United States of America
| | - Miles T. Rogers
- Department of Biology, Indiana University, Bloomington, IN, United States of America
| | - Jennifer Keen
- Department of Biology, Indiana University, Bloomington, IN, United States of America
| | - David M. Bland
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri, United States of America
| | - Andrew S. Houppert
- Department of Biology, Indiana University, Bloomington, IN, United States of America
| | - Caitlynn Miller
- Department of Biology, Indiana University, Bloomington, IN, United States of America
| | - Ian Temple
- Department of Biology, Indiana University, Bloomington, IN, United States of America
| | - Deborah M. Anderson
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri, United States of America
| | - Melanie M. Marketon
- Department of Biology, Indiana University, Bloomington, IN, United States of America
- * E-mail:
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Miyashita A, Takahashi S, Ishii K, Sekimizu K, Kaito C. Primed Immune Responses Triggered by Ingested Bacteria Lead to Systemic Infection Tolerance in Silkworms. PLoS One 2015; 10:e0130486. [PMID: 26107254 PMCID: PMC4479504 DOI: 10.1371/journal.pone.0130486] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 05/21/2015] [Indexed: 11/27/2022] Open
Abstract
In the present study, we examined whether microorganisms collaterally ingested by insects with their food activate the innate immune system to confer systemic resistance against subsequent bacterial invasion. Silkworms orally administered heat-killed Pseudomonas aeruginosa cells showed resistance against intra-hemolymph infection by P. aeruginosa. Oral administration of peptidoglycans, cell wall components of P. aeruginosa, conferred protective effects against P. aeruginosa infection, whereas oral administration of lipopolysaccharides, bacterial surface components, did not. In silkworms orally administered heat-killed P. aeruginosa cells, P. aeruginosa growth was inhibited in the hemolymph, and mRNA amounts of the antimicrobial peptides cecropin A and moricin were increased in the hemocytes and fat body. Furthermore, the amount of paralytic peptide, an insect cytokine that activates innate immune reactions, was increased in the hemolymph of silkworms orally administered heat-killed P. aeruginosa cells. These findings suggest that insects sense bacteria present in their food by peptidoglycan recognition, which activates systemic immune reactions to defend the insects against a second round of infection.
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Affiliation(s)
- Atsushi Miyashita
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 3–1, 7-chome, Hongo, Bunkyo-ku, Tokyo, 113–0033, Japan
| | - Shinji Takahashi
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 3–1, 7-chome, Hongo, Bunkyo-ku, Tokyo, 113–0033, Japan
| | - Kenichi Ishii
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 3–1, 7-chome, Hongo, Bunkyo-ku, Tokyo, 113–0033, Japan
| | - Kazuhisa Sekimizu
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 3–1, 7-chome, Hongo, Bunkyo-ku, Tokyo, 113–0033, Japan
| | - Chikara Kaito
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 3–1, 7-chome, Hongo, Bunkyo-ku, Tokyo, 113–0033, Japan
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Huang Y, Ma F, Wang W, Ren Q. Identification and molecular characterization of a peritrophin-like gene, involved in the antibacterial response in Chinese mitten crab, Eriocheir sinensis. Dev Comp Immunol 2015; 50:129-138. [PMID: 25596425 DOI: 10.1016/j.dci.2015.01.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 12/31/2014] [Accepted: 01/02/2015] [Indexed: 06/04/2023]
Abstract
Peritrophin was first isolated from insect peritrophic membrane (PM) and was thought to protect insects from invasion of microorganisms and to stimulate digestion of food. In this study, a peritrophin-like gene (EsPT) was obtained from Eriocheir sinensis. The full length cDNA of EsPT was 1232 bp, which contained 1005 bp ORF encoding a protein of 334 amino acids, including a 22 amino acid signal peptide, and 3 conserved chitin binding type 2 domains (ChtBD2) characterized by having a 6-cysteine motif. Phylogenetic analysis showed that EsPT was clustered together with 2 insect peritrophin-44-like proteins (MdP44L from Musca domestica and CcP44L from Ceratitis capitata), an insect chitin binding peritrophin-A domain containing protein (CfPT from Coptotermes formosanus) and a crustacean peritrophin (MnPT from Macrobrachium nipponense). Tissue distribution analysis revealed that EsPT was mainly expressed in hepatopancreas, intestine and hemocytes. The expression of EsPT is regulated by lipopolysaccharide, peptidoglycan, Staphylococcus aureus, Vibrio parahaemolyticus and Aeromonas hydrophila challenge. The recombinant EsPT could bind to different microbes, and enhanced the clearance of V. parahaemolyticus in vivo. In crabs, silencing of EsPT by siRNA suppressed the elimination of V. parahaemolyticus and increasing number of bacteria, finally upregulated the expression of anti-lipopolysaccharide factor (ALF) and clip domain serine proteases (cSP). The results might indicate that EsPT was involved in the anti-bacterial innate immunity of crabs.
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Affiliation(s)
- Ying Huang
- Jiangsu Key Laboratory for Biodiversity & Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, China
| | - FuTong Ma
- Jiangsu Key Laboratory for Biodiversity & Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, China
| | - Wen Wang
- Jiangsu Key Laboratory for Biodiversity & Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, China.
| | - Qian Ren
- Jiangsu Key Laboratory for Biodiversity & Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, China.
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Chavez C, Recio-Tótoro B, Flores-Escobar B, Lanz-Mendoza H, Sanchez J, Soberón M, Bravo A. Nitric oxide participates in the toxicity of Bacillus thuringiensis Cry1Ab toxin to kill Manduca sexta larvae. Peptides 2015; 68:134-9. [PMID: 25063056 DOI: 10.1016/j.peptides.2014.07.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 07/12/2014] [Accepted: 07/14/2014] [Indexed: 11/26/2022]
Abstract
Nitric oxide (NO) produced by the nitric oxide synthase (NOS) enzyme is a reactive oxygen molecule widely considered as important participant in the immune system of different organisms to confront microbial infections. In insects the NO molecule has also been implicated in immune response against microbial pathogens. Bacillus thuringiensis (Bt) is an insect-pathogenic bacterium that produces insecticidal proteins such as Cry toxins. These proteins kill insects because they form pores in the larval-midgut cells. Here we show that intoxication of Manduca sexta larvae with Cry1Ab activates expression of NOS with a corresponding increase in NO. This effect is not observed with a non-toxic mutant toxin Cry1Ab-E129K that is affected in pore formation. The increased production of NO triggered by intoxication with LC50 dose of Cry1Ab toxin is not associated with higher expression of antimicrobial peptides. NO participates in Cry1Ab toxicity since inhibition of NOS by selective l-NAME inhibitor prevented NO production and resulted in reduced mortality of the larvae. The fact that mortality was not completely abolished by L-NAME indicates that other processes participate in toxin action and induction of NO production upon Cry1Ab toxin administration accounts only for a part of the toxicity of this protein to M. sexta larvae.
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Affiliation(s)
- Carolina Chavez
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico.
| | - Benito Recio-Tótoro
- Centro de Investigaciones Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Av. Universidad 655, Cuernavaca, Morelos 62100, Mexico; Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico.
| | - Biviana Flores-Escobar
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico.
| | - Humberto Lanz-Mendoza
- Centro de Investigaciones Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Av. Universidad 655, Cuernavaca, Morelos 62100, Mexico.
| | - Jorge Sanchez
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico.
| | - Mario Soberón
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico.
| | - Alejandra Bravo
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico.
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Bera S, Ghosh A, Sharma S, Debnath T, Giri B, Bhunia A. Probing the role of Proline in the antimicrobial activity and lipopolysaccharide binding of indolicidin. J Colloid Interface Sci 2015; 452:148-159. [PMID: 25935286 DOI: 10.1016/j.jcis.2015.04.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 04/12/2015] [Accepted: 04/13/2015] [Indexed: 01/28/2023]
Abstract
HYPOTHESIS Indolicidin (ILPWKWPWWPWRR-NH2), an antimicrobial peptide from bovine neutrophils, possesses significant antibacterial activity. An interesting feature of indolicidin is its unusually high content of Tryptophan and Proline residues. While the involvement of Tryptophan has been studied for its hemolytic and antibacterial activity, little is known about the roles played by Proline in these aspects. We herein investigate the structure and biological activities of indolicidin, where Proline at either one or more of the 3rd, 7th, 10th positions has been replaced by Alanine to better understand its structure and biological function. EXPERIMENTS Structural aspects of Proline residues of indolicidin and its effect on antimicrobial activity were elucidated by replacing Proline residues with Alanine. Minimum inhibitory concentration (MIC) and scanning electron microscopy (SEM) experiments provide substantial evidence for the importance of Proline residues for antimicrobial activity and cell wall disintegration. Binding affinity of the peptides to Lipopolysaccharide (LPS) was investigated using fluorescence spectroscopy and dynamic light scattering (DLS) in conjunction with (31)PNMR spectroscopy and confirmed the disintegration of LPS layer. FINDINGS Our study reveals that Proline residues are necessary for interaction of indolicidin with LPS and establishes the significance of the third and tenth Proline residues for its antimicrobial activity. We believe that the presence of so many Proline residues provides the molecule a selective advantage of adopting different conformations varying from a globular, closed conformation to an open extended conformation, and even to a wedge-shaped conformation, which account for the diverse mechanisms of action of indolicidin.
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Affiliation(s)
- Swapna Bera
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Anirban Ghosh
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Shruti Sharma
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Tanmoy Debnath
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Banabihari Giri
- Central Instrument Facility, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India.
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Woolcott OO, Richey JM, Kabir M, Chow RH, Iyer MS, Kirkman EL, Stefanovski D, Lottati M, Kim SP, Harrison LN, Ionut V, Zheng D, Hsu IR, Catalano KJ, Chiu JD, Bradshaw H, Wu Q, Bergman RN. High-fat diet-induced insulin resistance does not increase plasma anandamide levels or potentiate anandamide insulinotropic effect in isolated canine islets. PLoS One 2015; 10:e0123558. [PMID: 25855974 PMCID: PMC4391925 DOI: 10.1371/journal.pone.0123558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 03/05/2015] [Indexed: 01/09/2023] Open
Abstract
Background Obesity has been associated with elevated plasma anandamide levels. In addition, anandamide has been shown to stimulate insulin secretion in vitro, suggesting that anandamide might be linked to hyperinsulinemia. Objective To determine whether high-fat diet-induced insulin resistance increases anandamide levels and potentiates the insulinotropic effect of anandamide in isolated pancreatic islets. Design and Methods Dogs were fed a high-fat diet (n = 9) for 22 weeks. Abdominal fat depot was quantified by MRI. Insulin sensitivity was assessed by the euglycemic-hyperinsulinemic clamp. Fasting plasma endocannabinoid levels were analyzed by liquid chromatography-mass spectrometry. All metabolic assessments were performed before and after fat diet regimen. At the end of the study, pancreatic islets were isolated prior to euthanasia to test the in vitro effect of anandamide on islet hormones. mRNA expression of cannabinoid receptors was determined in intact islets. The findings in vitro were compared with those from animals fed a control diet (n = 7). Results Prolonged fat feeding increased abdominal fat content by 81.3±21.6% (mean±S.E.M, P<0.01). In vivo insulin sensitivity decreased by 31.3±12.1% (P<0.05), concomitant with a decrease in plasma 2-arachidonoyl glycerol (from 39.1±5.2 to 15.7±2.0 nmol/L) but not anandamide, oleoyl ethanolamide, linoleoyl ethanolamide, or palmitoyl ethanolamide. In control-diet animals (body weight: 28.8±1.0 kg), islets incubated with anandamide had a higher basal and glucose-stimulated insulin secretion as compared with no treatment. Islets from fat-fed animals (34.5±1.3 kg; P<0.05 versus control) did not exhibit further potentiation of anandamide-induced insulin secretion as compared with control-diet animals. Glucagon but not somatostatin secretion in vitro was also increased in response to anandamide, but there was no difference between groups (P = 0.705). No differences in gene expression of CB1R or CB2R between groups were found. Conclusions In canines, high-fat diet-induced insulin resistance does not alter plasma anandamide levels or further potentiate the insulinotropic effect of anandamide in vitro.
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Affiliation(s)
- Orison O. Woolcott
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
- * E-mail:
| | - Joyce M. Richey
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Morvarid Kabir
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Robert H. Chow
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Malini S. Iyer
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Erlinda L. Kirkman
- Department of Animal Resources, University of Southern California, Los Angeles, California, United States of America
| | - Darko Stefanovski
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Maya Lottati
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Stella P. Kim
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - L. Nicole Harrison
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Viorica Ionut
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Dan Zheng
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Isabel R. Hsu
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Karyn J. Catalano
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Jenny D. Chiu
- Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Heather Bradshaw
- Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana, United States of America
| | - Qiang Wu
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Richard N. Bergman
- Diabetes and Obesity Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
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Zhukova DA, Klochko VV, Zelena LB, Reva OM, Dragovoz IV, Avdeeva LV. [The taxonomic study of the strain Bacillus sp. UCM B-7404--phytopathogenic fungae antagonist]. Mikrobiol Z 2015; 77:9-14. [PMID: 26036027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The polyphasic taxonomic analysis of strain Bacillus sp. UCM B-7404 active against phytopathogenic fungi and producing extracellular phytohormones, lytic enzymes and lipopeptide antifungal compounds has been carried out. The basic cell wall fatty acids presented by branched iso- and anteiso- C15:0 and C17:0 acids, contained 65-77% of the average pool. Phylogenetic assay of 16S rRNA gene nucleotide sequence, phenotypic and chemotaxonomic characteristics proved the attachment of strain Bacillus sp. UCM B-7404 to Bacillus amyloliquefaciens subsp. plantarum.
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Park HG, Kyung SS, Lee KS, Kim BY, Choi YS, Yoon HJ, Kwon HW, Je YH, Jin BR. Dual function of a bee (Apis cerana) inhibitor cysteine knot peptide that acts as an antifungal peptide and insecticidal venom toxin. Dev Comp Immunol 2014; 47:247-53. [PMID: 25106915 DOI: 10.1016/j.dci.2014.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 07/31/2014] [Accepted: 08/01/2014] [Indexed: 05/27/2023]
Abstract
Inhibitor cysteine knot (ICK) peptides exhibit ion channel blocking, insecticidal, and antimicrobial activities, but currently, no functional roles for bee-derived ICK peptides have been identified. In this study, a bee (Apis cerana) ICK peptide (AcICK) that acts as an antifungal peptide and as an insecticidal venom toxin was identified. AcICK contains an ICK fold that is expressed in the epidermis, fat body, or venom gland and is present as a 6.6-kDa peptide in bee venom. Recombinant AcICK peptide (expressed in baculovirus-infected insect cells) bound directly to Beauveria bassiana and Fusarium graminearum, but not to Escherichia coli or Bacillus thuringiensis. Consistent with these findings, AcICK showed antifungal activity, indicating that AcICK acts as an antifungal peptide. Furthermore, AcICK expression is induced in the fat body and epidermis after injection with B. bassiana. These results provide insight into the role of AcICK during the innate immune response following fungal infection. Additionally, we show that AcICK has insecticidal activity. Our results demonstrate a functional role for AcICK in bees: AcICK acts as an antifungal peptide in innate immune reactions in the body and as an insecticidal toxin in venom. The finding that the AcICK peptide functions with different mechanisms of action in the body and in venom highlights the two-pronged strategy that is possible with the bee ICK peptide.
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Affiliation(s)
- Hee Geun Park
- College of Natural Resources and Life Science, Dong-A University, Busan 604-714, Republic of Korea
| | - Seung Su Kyung
- College of Natural Resources and Life Science, Dong-A University, Busan 604-714, Republic of Korea
| | - Kwang Sik Lee
- College of Natural Resources and Life Science, Dong-A University, Busan 604-714, Republic of Korea
| | - Bo Yeon Kim
- College of Natural Resources and Life Science, Dong-A University, Busan 604-714, Republic of Korea
| | - Yong Soo Choi
- Department of Agricultural Biology, National Academy of Agricultural Science, Suwon, Republic of Korea
| | - Hyung Joo Yoon
- Department of Agricultural Biology, National Academy of Agricultural Science, Suwon, Republic of Korea
| | - Hyung Wook Kwon
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Yeon Ho Je
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Byung Rae Jin
- College of Natural Resources and Life Science, Dong-A University, Busan 604-714, Republic of Korea.
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