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Protein-Membrane Interactions in the Complex Biological Milieu

  • A. Chonn
  • S. C. Semple
  • P. R. Cullis
Part of the NATO ASI Series book series (volume 82)

Abstract

Alterations in the lipid composition of biological membranes can have dramatic effects on their ability to interact with soluble proteins. In a series of studies employing large unilamellar vesicles (LUVs) produced by an extrusion technique, we have characterized the influence of membrane components on protein-membrane interactions. Much of our understanding of how and why proteins interact with seemingly inert membrane surfaces stems mainly from studies involving one or two protein component systems. These studies, however, do not accurately reflect the interactions that occur in the complex biological milieu (reviewed by Horbett and Brash, 1987). There have been very few studies reported on the interactions of proteins with liposomal systems incubated with whole blood. There are two main reasons for this. First, the large majority of studies on the association of plasma proteins with liposomes in vitro have been performed employing multilamellar systems. Due to the variable lamellarity of liposomes of different lipid compositions, quantification of the amount of various proteins associated per liposome has not been possible. Second, convenient techniques have not been available for the isolation of liposomes, particularly LUVs, from blood components. We have recently described a rapid method for the isolation of well-defined large unilamellar liposomes from the blood of liposome-treated mice (Chonn et al., 1991). With such a procedure now available, we have started to biochemically and immunologically characterize the amount and type of proteins associated with liposomes exposed to the complex biological milieu.

Keywords

Fatty Acyl Phosphatidic Acid Blood Protein Fatty Acyl Chain Anionic Phospholipid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Chonn, A., Semple, S. C. and Cullis, P. R. (1991) Separation of large unilamellar liposomes from blood components by a spin column procedure: towards identifying plasma proteins which mediate liposome clearance in vivo. Biochim. Biophy. Acta 1070, 215–222.CrossRefGoogle Scholar
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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • A. Chonn
    • 1
  • S. C. Semple
    • 1
  • P. R. Cullis
    • 1
  1. 1.Department of BiochemistryThe University of British ColumbiaVancouverCanada

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