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Plácido A, do Pais do Amaral C, Teixeira C, Nogueira A, Brango-Vanegas J, Alves Barbosa E, C Moreira D, Silva-Carvalho AÉ, da Silva MDG, do Nascimento Dias J, Albuquerque P, Saldanha-Araújo F, C D A Lima F, Batagin-Neto A, Kuckelhaus S, Bessa LJ, Freitas J, Dotto Brand G, C Santos N, B Relvas J, Gomes P, S A Leite JR, Eaton P. Neuroprotective effects on microglia and insights into the structure-activity relationship of an antioxidant peptide isolated from Pelophylax perezi. J Cell Mol Med 2022; 26:2793-2807. [PMID: 35460166 PMCID: PMC9097852 DOI: 10.1111/jcmm.17292] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 02/07/2022] [Accepted: 02/22/2022] [Indexed: 11/29/2022] Open
Abstract
Tryptophyllins constitute a heterogeneous group of peptides that are one of the first classes of peptides identified from amphibian’s skin secretions. Here, we report the structural characterization and antioxidant properties of a novel tryptophyllin‐like peptide, named PpT‐2, isolated from the Iberian green frog Pelophylax perezi. The skin secretion of P. perezi was obtained by electrical stimulation and fractionated using RP‐HPLC. De novo peptide sequencing was conducted using MALDI MS/MS. The primary structure of PpT‐2 (FPWLLS‐NH2) was confirmed by Edman degradation and subsequently investigated using in silico tools. PpT‐2 shared physicochemical properties with other well‐known antioxidants. To test PpT‐2 for antioxidant activity in vitro, the peptide was synthesized by solid phase and assessed in the chemical‐based ABTS and DPPH scavenging assays. Then, a flow cytometry experiment was conducted to assess PpT‐2 antioxidant activity in oxidatively challenged murine microglial cells. As predicted by the in silico analyses, PpT‐2 scavenged free radicals in vitro and suppressed the generation of reactive species in PMA‐stimulated BV‐2 microglia cells. We further explored possible bioactivities of PpT‐2 against prostate cancer cells and bacteria, against which the peptide exerted a moderate antiproliferative effect and negligible antimicrobial activity. The biocompatibility of PpT‐2 was evaluated in cytotoxicity assays and in vivo toxicity with Galleria mellonella. No toxicity was detected in cells treated with up to 512 µg/ml and in G. mellonella treated with up to 40 mg/kg PpT‐2. This novel peptide, PpT‐2, stands as a promising peptide with potential therapeutic and biotechnological applications, mainly for the treatment/prevention of neurodegenerative disorders.
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Affiliation(s)
- Alexandra Plácido
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal
| | | | - Cátia Teixeira
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Ariane Nogueira
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - José Brango-Vanegas
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Eder Alves Barbosa
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil.,Laboratory of Synthesis and Analysis of Biomolecules (LSAB), Institute of Chemistry (IQ), University of Brasilia, Brasília, Brazil
| | - Daniel C Moreira
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Amandda É Silva-Carvalho
- Laboratory of Hematology and Stem Cells, Faculty of Health Sciences, University of Brasilia, Brasília, Brazil
| | - Maria da Gloria da Silva
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Jhones do Nascimento Dias
- Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, Brazil.,Biomedicine Course, Federal University of Delta do Parnaíba (UFDPar), Parnaíba, Brazil
| | - Patrícia Albuquerque
- Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, Brazil.,Faculty of Ceilândia, University of Brasilia, Brasilia, Brazil
| | - Felipe Saldanha-Araújo
- Laboratory of Hematology and Stem Cells, Faculty of Health Sciences, University of Brasilia, Brasília, Brazil
| | - Filipe C D A Lima
- Federal Institute of Education, Science and Technology of São Paulo, Matão, Brazil
| | | | - Selma Kuckelhaus
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Lucinda J Bessa
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal.,Egas Moniz Interdisciplinary Research Center (CiiEM), Egas Moniz - Cooperative for Higher Education, CRL, Almada, Portugal
| | - Jaime Freitas
- Institute for Research and Innovation in Health (i3S), National Institute of Biomedical Engineering (INEB), University of Porto, Porto, Portugal
| | - Guilherme Dotto Brand
- Laboratory of Synthesis and Analysis of Biomolecules (LSAB), Institute of Chemistry (IQ), University of Brasilia, Brasília, Brazil
| | - Nuno C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - João B Relvas
- Institute for Research and Innovation in Health (i3S), Institute for Molecular and Cell Biology (IBMC), University of Porto, Porto, Portugal
| | - Paula Gomes
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal
| | - José Roberto S A Leite
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal.,Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Peter Eaton
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal.,The Bridge, School of Chemistry, Joseph Banks Laboratories, University of Lincoln, Lincoln, UK
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Lam PL, Lee KKH, Wong RSM, Cheng GYM, Bian ZX, Chui CH, Gambari R. Recent advances on topical antimicrobials for skin and soft tissue infections and their safety concerns. Crit Rev Microbiol 2018; 44:40-78. [PMID: 28423970 DOI: 10.1080/1040841x.2017.1313811] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Antimicrobial resistance of disease-related microorganisms is considered a worldwide prevalent and serious issue which increases the failure of treatment outcomes and leads to high mortality. Considering that the increased resistance to systemic antimicrobial therapy often needs of the use of more toxic agents, topical antimicrobial therapy emerges as an attractive route for the treatment of infectious diseases. The topical antimicrobial therapy is based on the absorption of high drug doses in a readily accessible skin surface, resulting in a reduction of microbial proliferation at infected skin sites. Topical antimicrobials retain the following features: (a) they are able to escape the enzymatic degradation and rapid clearance in the gastrointestinal tract or the first-pass metabolism during oral administration; (b) alleviate the physical discomfort related to intravenous injection; (c) reduce possible adverse effects and drug interactions of systemic administrations; (d) increase patient compliance and convenience; and (e) reduce the treatment costs. Novel antimicrobials for topical application have been widely exploited to control the emergence of drug-resistant microorganisms. This review provides a description of antimicrobial resistance, common microorganisms causing skin and soft tissue infections, topical delivery route of antimicrobials, safety concerns of topical antimicrobials, recent advances, challenges and future prospective in topical antimicrobial development.
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Affiliation(s)
- P L Lam
- a Department of Applied Biology and Chemical Technology, State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Hong Kong , P.R. China
| | - K K H Lee
- b Department of Medicine and Therapeutics, School of Biomedical Sciences, MOE Key Laboratory for Regenerative Medicine , The Chinese University of Hong Kong , Hong Kong , P.R. China
| | - R S M Wong
- b Department of Medicine and Therapeutics, School of Biomedical Sciences, MOE Key Laboratory for Regenerative Medicine , The Chinese University of Hong Kong , Hong Kong , P.R. China
| | - G Y M Cheng
- c Faculty of Health Sciences , University of Macau , Macau , P.R. China
| | - Z X Bian
- d Clinical Division, School of Chinese Medicine , Hong Kong Baptist University , Hong Kong , P.R. China
| | - C H Chui
- a Department of Applied Biology and Chemical Technology, State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Hong Kong , P.R. China
- d Clinical Division, School of Chinese Medicine , Hong Kong Baptist University , Hong Kong , P.R. China
| | - R Gambari
- e Department of Life Sciences and Biotechnology, Centre of Biotechnology , University of Ferrara , Ferrara , Italy
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Du Q, Wang H, Ma C, Wu Y, Xi X, Zhou M, Chen T, Shaw C, Wang L. Identification of a Novel Vasodilatory Octapeptide from the Skin Secretion of the African Hyperoliid Frog, Kassina senegalensis. Molecules 2017; 22:molecules22071215. [PMID: 28753966 PMCID: PMC6152130 DOI: 10.3390/molecules22071215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 07/17/2017] [Accepted: 07/19/2017] [Indexed: 11/16/2022] Open
Abstract
The defensive skin secretions of amphibians continue to be an excellent source of novel biologically-active peptides. Here we report the identification and pharmacological activity of a novel C-terminally amided myotropic octapeptide from the skin secretion of the African hyperoliid frog, Kassina senegalensis. The 8-amino acid peptide has the following primary structure: WMSLGWSL-amide and has a molecular mass of 978 Da. The primary structure and organisation of the biosynthetic precursor of WL-8 amide was successfully deduced from cloned skin secretion-derived cDNA. The open-reading frame encoded a single copy of WL-8, located at the C-terminus. Synthetic WL-8 amide was found to cause relaxation of rat tail artery smooth muscle with an EC50 of 25.98 nM. This peptide is unique in terms of its primary structure and is unlike any other peptide previously isolated from an amphibian source which has been archived in the NCBI database. WL-8 amide thus represents the prototype of a novel family of myotropic peptide from amphibian defensive skin secretions.
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Affiliation(s)
- Qiang Du
- School of Pharmacy, China Medical University, Shenyang 110001, Liaoning, China.
| | - Hui Wang
- School of Pharmacy, China Medical University, Shenyang 110001, Liaoning, China.
| | - Chengbang Ma
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
| | - Yue Wu
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
| | - Xinping Xi
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
| | - Mei Zhou
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
| | - Tianbao Chen
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
| | - Chris Shaw
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
| | - Lei Wang
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
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