Journal of Thermal Analysis and Calorimetry

, Volume 87, Issue 1, pp 199–203

Interaction of gadolinium with phospholipids bilayer membranes

  • J. Sabín
  • G. Prieto
  • Elena Blanco
  • J. M. Ruso
  • Roberta Angelini
  • F. Bordi
  • F. Sarmiento
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DOI: 10.1007/s10973-006-7841-6

Cite this article as:
Sabín, J., Prieto, G., Blanco, E. et al. J Therm Anal Calorim (2007) 87: 199. doi:10.1007/s10973-006-7841-6

Abstract

The effects of concentration of gadolinium ions Gd3+ on dipalmitoyl L-α-phosphatidylcholine (DPPC) unilamellar vesicles in aqueous media were studied by photon correlation spectroscopy (PCS) and differential scanning calorimeter. The theoretical predictions of the colloidal stability of liposomes were followed using the Derjaguin–Landau–Verwey–Overbeek (DLVO) theory. Changes in the size of liposomes were observed as Gd3+ concentration increases, suggesting that this cation induces the aggregation of vesicles. To determine the effect of Gd3+ on the transition temperature (Tc) and on the enthalpy (ΔHc) associated with the process differential scanning calorimetry (DSC) has been used. The addition of the metal ion provided DSC curves with different behavior to DPPC bilayer.

Keywords

colloidal stability DPPC vesicles DSC gadolinium 

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • J. Sabín
    • 1
  • G. Prieto
    • 1
  • Elena Blanco
    • 1
  • J. M. Ruso
    • 1
  • Roberta Angelini
    • 2
    • 3
  • F. Bordi
    • 2
    • 3
  • F. Sarmiento
    • 1
  1. 1.Grupo de Biofísica e Interfases, Departamento de Física Aplicada, Facultade de FísicaUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
  2. 2.Dipartimento di FisicaUniversità di Roma ‘La Sapienza’RomaItaly
  3. 3.INFM CRS-SOFTUnità di RomaRomaItaly

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