Effects of ceramide on liquid-ordered domains investigated by simultaneous AFM and FCS

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Salvatore Chiantia - , Technische Universität Dresden (Autor:in)
  • Nicoletta Kahya - , Technische Universität Dresden (Autor:in)
  • Jonas Ries - , Technische Universität Dresden (Autor:in)
  • Petra Schwille - , Professur für Biophysik (Autor:in)

Abstract

The sphingolipid ceramides are known to influence lipid lateral organization in biological membranes. In particular, ceramide-induced alterations of microdomains can be involved in several cell functions, ranging from apoptosis to immune response. We used a combined approach of atomic force microscopy, fluorescence correlation spectroscopy, and confocal fluorescence imaging to investigate the effects of ceramides in model membranes of biological relevance. Our results show that physiological quantities of ceramide in sphingomyelin/dioleoylphosphatidylcholine/cholesterol supported bilayers lead to a significant rearrangement of lipid lateral organization. Our experimental setup allowed a simultaneous characterization of both structural and dynamic modification of membrane microdomains, induced by the presence of ceramide. Formation of similar ceramide-enriched domains and, more general, alterations of lipid-lipid interactions can be of crucial importance for the biological function of cell membranes.

Details

OriginalspracheEnglisch
Seiten (von - bis)4500-4508
Seitenumfang9
FachzeitschriftBiophysical journal
Jahrgang90
Ausgabenummer12
PublikationsstatusVeröffentlicht - Juni 2006
Peer-Review-StatusJa

Externe IDs

PubMed 16565041

Schlagworte

ASJC Scopus Sachgebiete