Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.bbrep.2020.100827 http://hdl.handle.net/11449/210429 |
Resumo: | Antimicrobial peptides (AMPs) have been appointed as a possible alternative to traditional antibiotics in face of pathogens increasing resistance to conventional drugs. Hylin a1 (IFGAILPLALGALKNLIK), an AMP extracted from the skin secretion of a South American frog, Hypsiboas albopunctatus, was found to show a strong cytotoxicity against bacteria and fungus, but also a considerable hemolytic action. Considering the toxicity of the peptide in eukaryotic cells, this work focuses on investigating the effects of the interaction of the Hylin a1 analogues W(6)Hya1, D(0)W(6)Hya1 and K(0)W(6)Hya1 with models of eukaryotic structures, namely zwitterionic liposomes of dipalmitoyl phosphatidylcholine (DPPC) and calf-thymus DNA (CT DNA). Through intrinsic Trp fluorescence we determined that the peptide affinity for fluid DPPC bilayers follows the decreasing order: D(0)W(6)Hya1 (+2) > W(6)Hya1 (+3) >> K(0)W(6)Hya1 (+4). Fluorescence data also indicate that the Trp residue in the more positively charged peptide, K(0)W(6)Hya1, is less deep in the bilayer than the residue in the other two peptides. This finding is supported by differential scanning calorimetry (DSC) data, which shows that both D(0)W(6)Hya1 and W(6)Hya1 disturb DPPC gel-fluid transition slightly more effectively than K(0)W(6)Hya1. DPPC DSC profiles are homogeneously disturbed by the three peptides, probably related to peptide-membrane diffusion. Surprisingly, the peptide that displays the lowest affinity for PC membranes and is located at the more superficial position in the bilayer, K(0)W(6)Hya1, is the most efficient in causing formation of pores on the membrane, as attested by carboxyfluorescein leakage assays. The three peptides were found to interact with CT DNA, with a deep penetration of the Trp residue into hydrophobic pockets of the double helix, as indicated by the significant blue shift on the Trp fluorescence, and the displacement of DNA-bound ethidium bromide by the peptides. The experiments of DNA electrophoresis confirm that Hylin peptides bind DNA in a concentration-dependent manner, inducing complete DNA retardation at the relative AMP/plasmid DNA weight ratio of similar to 17. These findings could help to better understand the AMPs toxic effects on eukaryotic cells, thus contributing to the design of healthier therapeutic agents. |
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Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNAAntimicrobial peptidesDPPC vesiclesDNADSCFluorescence spectroscopyElectrophoresisAntimicrobial peptides (AMPs) have been appointed as a possible alternative to traditional antibiotics in face of pathogens increasing resistance to conventional drugs. Hylin a1 (IFGAILPLALGALKNLIK), an AMP extracted from the skin secretion of a South American frog, Hypsiboas albopunctatus, was found to show a strong cytotoxicity against bacteria and fungus, but also a considerable hemolytic action. Considering the toxicity of the peptide in eukaryotic cells, this work focuses on investigating the effects of the interaction of the Hylin a1 analogues W(6)Hya1, D(0)W(6)Hya1 and K(0)W(6)Hya1 with models of eukaryotic structures, namely zwitterionic liposomes of dipalmitoyl phosphatidylcholine (DPPC) and calf-thymus DNA (CT DNA). Through intrinsic Trp fluorescence we determined that the peptide affinity for fluid DPPC bilayers follows the decreasing order: D(0)W(6)Hya1 (+2) > W(6)Hya1 (+3) >> K(0)W(6)Hya1 (+4). Fluorescence data also indicate that the Trp residue in the more positively charged peptide, K(0)W(6)Hya1, is less deep in the bilayer than the residue in the other two peptides. This finding is supported by differential scanning calorimetry (DSC) data, which shows that both D(0)W(6)Hya1 and W(6)Hya1 disturb DPPC gel-fluid transition slightly more effectively than K(0)W(6)Hya1. DPPC DSC profiles are homogeneously disturbed by the three peptides, probably related to peptide-membrane diffusion. Surprisingly, the peptide that displays the lowest affinity for PC membranes and is located at the more superficial position in the bilayer, K(0)W(6)Hya1, is the most efficient in causing formation of pores on the membrane, as attested by carboxyfluorescein leakage assays. The three peptides were found to interact with CT DNA, with a deep penetration of the Trp residue into hydrophobic pockets of the double helix, as indicated by the significant blue shift on the Trp fluorescence, and the displacement of DNA-bound ethidium bromide by the peptides. The experiments of DNA electrophoresis confirm that Hylin peptides bind DNA in a concentration-dependent manner, inducing complete DNA retardation at the relative AMP/plasmid DNA weight ratio of similar to 17. These findings could help to better understand the AMPs toxic effects on eukaryotic cells, thus contributing to the design of healthier therapeutic agents.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Colombian COLCIENCIAS agencyUniv Sao Paulo, Inst Fis, Sao Paulo, SP, BrazilUniv Sao Paulo, Inst Ciencias Biomed, Sao Paulo, SP, BrazilUniv Fed Jatai, Unidade Academ Especial Ciencias Saude, Jatai, Go, BrazilUniv Estadual Paulista, Inst Quim, Araraquara, SP, BrazilUniv Estadual Paulista, Inst Quim, Araraquara, SP, BrazilCNPq: 465259/2014-6CNPq: 405637/2017-1FAPESP: 2017/25930-1FAPESP: 2014/50983-3FAPESP: 2018/20162-9Elsevier B.V.Universidade de São Paulo (USP)Univ Fed JataiUniversidade Estadual Paulista (Unesp)Vignoli Muniz, Gabriel S.De la Torre, LiliaDuarte, Evandro L.Lorenzon, Esteban N.Cilli, Eduardo M. [UNESP]Balan, AndreaTeresa Lamy, M.2021-06-25T15:20:20Z2021-06-25T15:20:20Z2020-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article12http://dx.doi.org/10.1016/j.bbrep.2020.100827Biochemistry And Biophysics Reports. Amsterdam: Elsevier, v. 24, 12 p., 2020.2405-5808http://hdl.handle.net/11449/21042910.1016/j.bbrep.2020.100827WOS:000646691800032Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBiochemistry And Biophysics Reportsinfo:eu-repo/semantics/openAccess2021-10-23T20:17:31Zoai:repositorio.unesp.br:11449/210429Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:21:50.701035Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA |
title |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA |
spellingShingle |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA Vignoli Muniz, Gabriel S. Antimicrobial peptides DPPC vesicles DNA DSC Fluorescence spectroscopy Electrophoresis |
title_short |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA |
title_full |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA |
title_fullStr |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA |
title_full_unstemmed |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA |
title_sort |
Interaction of synthetic antimicrobial peptides of the Hylin a1 family with models of eukaryotic structures: Zwitterionic membranes and DNA |
author |
Vignoli Muniz, Gabriel S. |
author_facet |
Vignoli Muniz, Gabriel S. De la Torre, Lilia Duarte, Evandro L. Lorenzon, Esteban N. Cilli, Eduardo M. [UNESP] Balan, Andrea Teresa Lamy, M. |
author_role |
author |
author2 |
De la Torre, Lilia Duarte, Evandro L. Lorenzon, Esteban N. Cilli, Eduardo M. [UNESP] Balan, Andrea Teresa Lamy, M. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Univ Fed Jatai Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Vignoli Muniz, Gabriel S. De la Torre, Lilia Duarte, Evandro L. Lorenzon, Esteban N. Cilli, Eduardo M. [UNESP] Balan, Andrea Teresa Lamy, M. |
dc.subject.por.fl_str_mv |
Antimicrobial peptides DPPC vesicles DNA DSC Fluorescence spectroscopy Electrophoresis |
topic |
Antimicrobial peptides DPPC vesicles DNA DSC Fluorescence spectroscopy Electrophoresis |
description |
Antimicrobial peptides (AMPs) have been appointed as a possible alternative to traditional antibiotics in face of pathogens increasing resistance to conventional drugs. Hylin a1 (IFGAILPLALGALKNLIK), an AMP extracted from the skin secretion of a South American frog, Hypsiboas albopunctatus, was found to show a strong cytotoxicity against bacteria and fungus, but also a considerable hemolytic action. Considering the toxicity of the peptide in eukaryotic cells, this work focuses on investigating the effects of the interaction of the Hylin a1 analogues W(6)Hya1, D(0)W(6)Hya1 and K(0)W(6)Hya1 with models of eukaryotic structures, namely zwitterionic liposomes of dipalmitoyl phosphatidylcholine (DPPC) and calf-thymus DNA (CT DNA). Through intrinsic Trp fluorescence we determined that the peptide affinity for fluid DPPC bilayers follows the decreasing order: D(0)W(6)Hya1 (+2) > W(6)Hya1 (+3) >> K(0)W(6)Hya1 (+4). Fluorescence data also indicate that the Trp residue in the more positively charged peptide, K(0)W(6)Hya1, is less deep in the bilayer than the residue in the other two peptides. This finding is supported by differential scanning calorimetry (DSC) data, which shows that both D(0)W(6)Hya1 and W(6)Hya1 disturb DPPC gel-fluid transition slightly more effectively than K(0)W(6)Hya1. DPPC DSC profiles are homogeneously disturbed by the three peptides, probably related to peptide-membrane diffusion. Surprisingly, the peptide that displays the lowest affinity for PC membranes and is located at the more superficial position in the bilayer, K(0)W(6)Hya1, is the most efficient in causing formation of pores on the membrane, as attested by carboxyfluorescein leakage assays. The three peptides were found to interact with CT DNA, with a deep penetration of the Trp residue into hydrophobic pockets of the double helix, as indicated by the significant blue shift on the Trp fluorescence, and the displacement of DNA-bound ethidium bromide by the peptides. The experiments of DNA electrophoresis confirm that Hylin peptides bind DNA in a concentration-dependent manner, inducing complete DNA retardation at the relative AMP/plasmid DNA weight ratio of similar to 17. These findings could help to better understand the AMPs toxic effects on eukaryotic cells, thus contributing to the design of healthier therapeutic agents. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-01 2021-06-25T15:20:20Z 2021-06-25T15:20:20Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.bbrep.2020.100827 Biochemistry And Biophysics Reports. Amsterdam: Elsevier, v. 24, 12 p., 2020. 2405-5808 http://hdl.handle.net/11449/210429 10.1016/j.bbrep.2020.100827 WOS:000646691800032 |
url |
http://dx.doi.org/10.1016/j.bbrep.2020.100827 http://hdl.handle.net/11449/210429 |
identifier_str_mv |
Biochemistry And Biophysics Reports. Amsterdam: Elsevier, v. 24, 12 p., 2020. 2405-5808 10.1016/j.bbrep.2020.100827 WOS:000646691800032 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Biochemistry And Biophysics Reports |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
12 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129312847560704 |