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Erickson VI, Dung TT, Khoi LM, Hounmanou YMG, Phu TM, Dalsgaard A. Genomic Insights into Edwardsiella ictaluri: Molecular Epidemiology and Antimicrobial Resistance in Striped Catfish ( Pangasianodon hypophthalmus) Aquaculture in Vietnam. Microorganisms 2024; 12:1182. [PMID: 38930563 PMCID: PMC11205447 DOI: 10.3390/microorganisms12061182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/21/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024] Open
Abstract
Edwardsiella ictaluri is responsible for causing bacillary necrosis (BNP) in striped catfish (Pangasianodon hypophthalmus) in Vietnam. This study offers a comprehensive genomic characterization of E. ictaluri to enhance understanding of the molecular epidemiology, virulence, and antimicrobial resistance. E. ictaluri isolates were collected from diseased striped catfish in the Mekong Delta. The species was confirmed through PCR. Antimicrobial susceptibility testing was conducted using minimum inhibitory concentrations for commonly used antimicrobials. Thirty representative isolates were selected for whole genome sequencing to delineate their genomic profiles and phylogeny. All strains belonged to ST-26 and exhibited genetic relatedness, differing by a maximum of 90 single nucleotide polymorphisms. Most isolates carried multiple antimicrobial resistance genes, with the tet(A) gene present in 63% and floR in 77% of the genomes. The ESBL gene, blaCTX-M-15, was identified in 30% of the genomes. Three plasmid replicon types were identified: IncA, p0111, and IncQ1. The genomes clustered into two clades based on their virulence gene profile, one group with the T3SS genes and one without. The genetic similarity among Vietnamese isolates suggests that disease spread occurs within the Mekong region, underscoring the importance of source tracking, reservoir identification, and implementation of necessary biosecurity measures to mitigate spread of BNP.
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Affiliation(s)
- Vera Irene Erickson
- Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg, Denmark; (V.I.E.); (Y.M.G.H.)
| | - Tu Thanh Dung
- Department of Aquatic Pathology, Can Tho University, Can Tho 94000, Vietnam; (T.T.D.); (L.M.K.)
| | - Le Minh Khoi
- Department of Aquatic Pathology, Can Tho University, Can Tho 94000, Vietnam; (T.T.D.); (L.M.K.)
| | - Yaovi Mahuton Gildas Hounmanou
- Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg, Denmark; (V.I.E.); (Y.M.G.H.)
| | - Tran Minh Phu
- Department of Aquatic Product Processing, Can Tho University, Can Tho 94000, Vietnam;
| | - Anders Dalsgaard
- Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg, Denmark; (V.I.E.); (Y.M.G.H.)
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Al-Naseri A, Al-Absi S, El Ridi R, Mahana N. A comprehensive and critical overview of schistosomiasis vaccine candidates. J Parasit Dis 2021; 45:557-580. [PMID: 33935395 PMCID: PMC8068781 DOI: 10.1007/s12639-021-01387-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 03/31/2021] [Indexed: 12/11/2022] Open
Abstract
A digenetic platyhelminth Schistosoma is the causative agent of schistosomiasis, one of the neglected tropical diseases that affect humans and animals in numerous countries in the Middle East, sub-Saharan Africa, South America and China. Several control methods were used for prevention of infection or treatment of acute and chronic disease. Mass drug administration led to reduction in heavy-intensity infections and morbidity, but failed to decrease schistosomiasis prevalence and eliminate transmission, indicating the need to develop anti-schistosome vaccine to prevent infection and parasite transmission. This review summarizes the efficacy and protective capacity of available schistosomiasis vaccine candidates with some insights and future prospects.
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Affiliation(s)
- Aya Al-Naseri
- Zoology Department, Faculty of Science, Cairo Univesity, Giza, 12613 Egypt
| | - Samar Al-Absi
- Zoology Department, Faculty of Science, Cairo Univesity, Giza, 12613 Egypt
| | - Rashika El Ridi
- Zoology Department, Faculty of Science, Cairo Univesity, Giza, 12613 Egypt
| | - Noha Mahana
- Zoology Department, Faculty of Science, Cairo Univesity, Giza, 12613 Egypt
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Liu L, Kuang Y, Yang H, Chen Y. An amplification strategy using DNA-Peptide dendrimer probe and mass spectrometry for sensitive MicroRNA detection in breast cancer. Anal Chim Acta 2019; 1069:73-81. [DOI: 10.1016/j.aca.2019.04.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/01/2019] [Accepted: 04/07/2019] [Indexed: 01/12/2023]
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Study of Peptide Mimetics of Hepatitis A Virus Conjugated to Keyhole Limpet Hemocyanin and as Multiple Antigen Peptide System. Int J Pept Res Ther 2013. [DOI: 10.1007/s10989-013-9364-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Garay H, Menéndez T, Cruz-Leal Y, Coizeau E, Noda J, Morera V, Guillén G, Albericio F, Reyes O. Study of various presentation forms for a peptide mimetic of Neisseria meningitidis serogroup B capsular polysaccharide. Bioconjug Chem 2010; 22:33-41. [PMID: 21141955 DOI: 10.1021/bc100299g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The formulation of a broadly protective vaccine to prevent the serogroup B Neisseria meningitidis (MenB) disease is still an unmet medical need. We have previously reported the induction of bactericidal and protective antibodies against MenB after immunization of mice with a phage-displayed peptide named 4 L-5. This peptide mimics a capsular polysaccharide (CPS) epitope in MenB. With the aim of developing vaccine formulations that could be used in humans, we evaluate in this study various forms of presentation to the immune system of the 4 L-5 sequence, based on synthetic peptides. We synthesized the following: (i) a linear 4 L-5 peptide, (ii) a multiple antigen peptide containing four copies of the 4 L-5 sequence (named MAP), which was then dimerized, and the product named dimeric MAP, and (iii) a second multiple antigen peptide, in this case with two copies of the 4 L-5 sequence and a copy of a T-helper cell epitope of tetanus toxoid, which was then dimerized and the product named MAP-TT. The linear peptide, the MAP, and the dimeric MAP were conjugated to the carrier protein P64K by different conjugation methods. Plain antigens and antigens coupled to P64K were used to immunize BALB/c mice. Of those variants that gave immunogenic results, MAP-TT rendered the highest levels of specific antipeptide IgG antibodies and serum bactericidal activity. These results can find application in the development of meningococcal vaccine candidates and in peptide-based vaccines strategies.
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Affiliation(s)
- Hilda Garay
- Chemistry-Physics Division, Center for Genetic Engineering and Biotechnology, PO Box 6162, Havana, Cuba.
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Tam JP, Spetzler JC. Synthesis and application of peptide dendrimers as protein mimetics. ACTA ACUST UNITED AC 2008; Chapter 18:Unit18.5. [PMID: 18429141 DOI: 10.1002/0471140864.ps1805s17] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The use of peptides to mimic a portion of a protein structure is a challenging and powerful tool in the discovery of new drugs. In native proteins, discontinuous bioactive peptide surfaces are held together in a particular conformation by the structural rigidity of the protein. Approaches to mimicking a structural surface center on bringing the potential peptide sequences together by assembling the peptide chains on a template. These templates can be flexible dendrimeric or cyclic peptides as well as more rigid organic molecules. The Multiple Antigen Peptide (MAP) system represents a novel approach to preparing peptide immunogens. The MAP consists of an inner core matrix built up of a large layer of Lys residues and a surface of peptide chains attached to the core matrix. Because of its dendrimeric structure, MAP can be very useful as a template for assembling potential peptide surfaces. A variation of this procedure, the cyclic Multiple Antigen Peptide (cMAP) approach, is also presented here. Having branched multiple closed-chain architectures, the cMAP system is often a superior approach for protein mimetics because the multiple constrained peptides can mimic bioactive conformations. Whether to select this approach over MAP depends on the properties of the peptides, but usually if the peptides are too small to adopt a stable conformation on their own, incorporation of a cyclic structure may be necessary. MAPs have been applied to areas of study such as inhibitors, artificial proteins, affinity purifications, and intracellular transport.
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Affiliation(s)
- J P Tam
- Vanderbilt University School of Medicine, Nashville, Tennessee, USA
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Abstract
Dendrimers are branched structures and represent a fast growing field covering many areas of chemistry. Various types of dendrimers differing in composition and structure are mentioned, together with their practical use spanning from catalysis, transport vehicles to synthetic vaccines. The main stress is given to peptide dendrimers, namely, multiple antigenic peptides (MAPs). Their synthesis, physicochemical properties, biological activities, etc. have been described with many examples. MAPs can be used as diagnostics, mimetics, for complexation of different cations, as vaccines against parasites, bacteria, viruses, etc.
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Affiliation(s)
- Petr Niederhafner
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
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Abstract
In crustaceans, the synthesis of ecdysteroid molting hormones is regulated by molt-inhibiting hormone (MIH), a neuropeptide produced by an eyestalk neuroendocrine system, the X-organ/sinus gland complex. Using sequence analysis software, two regions of the blue crab (Callinectes sapidus) MIH peptide were selected for antibody production. Two 14-mer peptides were commercially synthesized and used to generate polyclonal antisera. Western blot analysis revealed that each antiserum bound to proteins of the predicted size in extracts of C. sapidus sinus glands, and lysates of insect cells containing recombinant MIH. Thin section immunocytochemistry using either antiserum showed specific immunoreactivity in X-organ neurosecretory cell bodies, their associated axons and collaterals, and their axon terminals in the sinus gland.
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Affiliation(s)
- Kara J Lee
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294-1170, USA
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Tam JP, Spetzler JC. Synthesis and Application of Peptide Dendrimers As Protein Mimetics. ACTA ACUST UNITED AC 2001; Chapter 9:9.6.1-9.6.36. [DOI: 10.1002/0471142735.im0906s34] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- James P. Tam
- Vanderbilt University School of Medicine Nashville Tennessee
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Holm A, Jørgensen RM, Ostergaard S, Theisen M. Ligand-presenting assembly: a method for C- and N-terminal antigen presentation. THE JOURNAL OF PEPTIDE RESEARCH : OFFICIAL JOURNAL OF THE AMERICAN PEPTIDE SOCIETY 2000; 56:105-13. [PMID: 10961545 DOI: 10.1034/j.1399-3011.2000.00758.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Achiral dicarboxylic acids were coupled with 2 eq. of the free alpha-amino groups of two fully side-chain protected peptide chains while these were still attached to a synthesis resin. Cleavage from the resin with simultaneous side-chain deprotection afforded two assembled peptide chains with free C-terminals. Suitable functionalization of the achiral dicarboxylic acid alternatively permitted continued peptide synthesis in a C to N orientation leading to a final peptide assembly which, after cleavage from the resin, may have multiple N to C and C to N presentation of one or more epitopes.
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Affiliation(s)
- A Holm
- Research Center for Medical Biotechnology, Chemistry Department, The Royal Veterinary and Agricultural University, Copenhagen, Denmark.
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Abstract
Recent progress in peptide and glycopeptide chemistry make the preparation of peptide and glycopeptide dendrimers of acceptable purity, with designed structural and immunochemical properties reliable. New methodologies using unprotected peptide building blocks have been developed to further increase the possibilities of their design and improve their preparation and separation. The sophisticated design of peptide and glycopeptide dendrimers has led to their use as antigens and immunogens, for serodiagnosis and other biochemical uses including drug delivery. Dendrimers bearing peptide with predetermined secondary structures are useful tools in protein de novo design. This article covers synthesis and applications of multiple antigen peptides (MAPs), multiple antigen glycopeptides (MAGs), multiple antigen peptides based on sequential oligopeptide carriers (MAP-SOCs), glycodendrimers and template-assembled synthetic proteins (TASPs). In part II the preparation of MAPs, and the utility of glycodendrimers and TASPs are discussed.
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Affiliation(s)
- P Veprek
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague
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Falorni M, Dettori G, Giacomelli G. Synthesis of new oxazole-containing peptidomimetics. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0957-4166(98)00109-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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