Interaction of amphiphilic derivatives of chitosan with DPPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine)

de Oliveira Tiera, Vera Aparecida; Winnik, Francoise M.; Tiera, Marcio Jose

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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Interaction of amphiphilic derivatives of chitosan with DPPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine)

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Author(s):	de Oliveira Tiera, Vera Aparecida ^[1] ; Winnik, Francoise M. ^{[2, 3]} ; Tiera, Marcio Jose ^[1] Total Authors: 3
Affiliation:	^[1] UNESP, Inst Biociencias Letras & Ciencias Exatas, Dept Quim & Ciencias Ambientais, Sao Jose Do Rio Preto, SP - Brazil ^[2] Univ Montreal, Dept Chem, Montreal, PQ H3C 3J7 - Canada ^[3] Univ Montreal, Fac Pharm, Montreal, PQ H3C 3J7 - Canada Total Affiliations: 3
Document type:	Journal article
Source:	JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 100, n. 1, p. 309-313, APR 2010.
Web of Science Citations:	15
Abstract
The interaction of chitosan and its N-dodecyl and poly(ethylene glycol) derivatives with 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) vesicles was studied to evaluate the influence of molecular architecture of the polymers on the liposomes. The study was carried out in aqueous solution using differential scanning microcalorimetry (DSC) and dynamic light scattering. The interaction of these polymers with DPPC vesicles altered the gel-liquid crystalline phase transition temperature and decreased both the enthalpy (Delta H) and cooperativity of the phase transition. The results obtained indicate that perturbations in the vesicles surface and the incorporation of chitosan and its derivatives into the lipid bilayer upon polysaccharides interaction are responsible for the formation of large vesicles. (AU)

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