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Effect of thiol-functionalisation on chitosan antibacterial activity: interaction with a bacterial membrane model
dc.contributor.author | Macedo Fernandes, Margarida Maria |
dc.contributor.author | Francesko, Antonio |
dc.contributor.author | Torrent Burgués, Juan |
dc.contributor.author | Tzanov, Tzanko |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química |
dc.date.accessioned | 2014-03-26T17:41:37Z |
dc.date.created | 2013-01-12 |
dc.date.issued | 2013-01-12 |
dc.identifier.citation | Macedo, M.M. [et al.]. Effect of thiol-functionalisation on chitosan antibacterial activity: interaction with a bacterial membrane model. "Reactive and functional polymers", 12 Gener 2013, vol. 73, núm. 10, p. 2013-1384. |
dc.identifier.issn | 1381-5148 |
dc.identifier.uri | http://hdl.handle.net/2117/22395 |
dc.description.abstract | The antibacterial activity of chitosan modified with the thiol-containing 2-iminothiolane HCl (TC-IMI) and N-acetyl- L -cysteine (TC-NAC) was studied by Langmuir film balance technique using a dipalmitoylphos- phatidylglycerol (DPPG) monolayer bacterial membrane model. The interactions of the biopolymer with the membrane model were assessed by monitoring the differences in the shape of the compression iso- therms recorded in the absence and presence of chitosan and thiolated conjugates in the subphase. A low molecularweightchitosan(15 kDa)shiftedthecompressionisothermsofDPPGmonolayerstowardslarger areas ( A 0,CS = 145 Å 2 ), confirming its membrane disturbance capacity. Further thiolation induced higher yield of expansion, more pronounced in the case of TC-IMI. The expansion of the monolayer increased sig- nificantly( A 0,TC-NAC = 150 Å 2 vs A 0,TC-IMI = 175 Å 2 )andtheelasticityatasurfacepressureof30 mN/m,typical for bio-membranes decreased to a greater extent C 1 s ; 30 TC NAC = 120 mN/m vs C 1 s ; 30 TC IMI = 87 mN/m) in presence of TC-IMI. Antibacterial tests against a Gram-negative Escherichia coli and a Gram-positive Staph- ylococcusaureus wereingoodagreementwiththesefindings,suggestingthatchitosanthiolatedwith2-imi- nothiolane HCl acts as a bactericide disrupting the integrity of the bacterial cell membrane |
dc.format.extent | -628 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria química |
dc.subject.lcsh | Chemical engineering |
dc.subject.other | Thiolated chitosan |
dc.subject.other | Antibacterial activity |
dc.subject.other | Langmuir monolayers |
dc.subject.other | Cell membrane mode |
dc.title | Effect of thiol-functionalisation on chitosan antibacterial activity: interaction with a bacterial membrane model |
dc.type | Article |
dc.subject.lemac | Enginyeria química |
dc.contributor.group | Universitat Politècnica de Catalunya. GBMI - Grup de Biotecnologia Molecular i Industrial |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.reactfunctpolym.2013.01.004 |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 11211303 |
dc.description.version | Postprint (published version) |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/FP7/228730/EU/A pilot line of antibacterial and antifungal medical textiles based on a sonochemical process/SONO |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/FP7/278402/EU/Novel approaches for prevention and degeneration of pathogenic bacteria biofilms formed on medical devices e.g. catheters/NOVO |
dc.date.lift | 10000-01-01 |
local.citation.author | Macedo, M.M.; Francesko, A.; Torrent, J.; Tzanov, T. |
local.citation.publicationName | Reactive and functional polymers |
local.citation.volume | 73 |
local.citation.number | 10 |
local.citation.startingPage | 2013 |
local.citation.endingPage | 1384 |
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