A ToF-SIMS study of the lateral organization of lipids and proteins in pulmonary surfactant systems

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DOIResolve DOI: http://doi.org/10.1016/j.bbamem.2010.11.015
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TypeArticle
Journal titleBiochimica et Biophysica Acta - Biomembranes
ISSN0005-2736
Volume1808
Issue3
Pages614621; # of pages: 8
Subjectcholesterol; lung surfactant; surfactant function; peptide; phospholipid; Langmuir Blodgett film; atomic force microscopy; phase separation; priority journal; protein function; protein lipid interaction; protein localization; surface property; time of flight secondary mass spectrometry; lipid bilayers; pulmonary alveoli; pulmonary surfactants; surface tension; lipids proteins lateral organization
AbstractPulmonary surfactant is a complex lipid-protein mixture whose main function is to reduce the surface tension at the air-liquid interface of alveoli to minimize the work of breathing. The exact mechanism by which surfactant monolayers and multilayers are formed and how they lower surface tension to very low values during lateral compression remains uncertain. We used time-of-flight secondary ion mass spectrometry to study the lateral organization of lipids and peptide in surfactant preparations ranging in complexity. We show that we can successfully determine the location of phospholipids, cholesterol and a peptide in surfactant Langmuir-Blodgett films and we can determine the effect of cholesterol and peptide addition. A thorough understanding of the lateral organization of PS interfacial films will aid in our understanding of the role of each component as well as different lipid-lipid and lipid-protein interactions. This may further our understanding of pulmonary surfactant function. © 2010 Elsevier B.V. All rights reserved.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology
Peer reviewedYes
NPARC number21271896
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Record identifierc6f6496a-ddca-4ce0-906c-945b2c7c19c4
Record created2014-05-05
Record modified2016-05-09
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