Document Detail


Imaging of Fas-FasL membrane microdomains during apoptosis in a reconstituted cell-cell junction.
MedLine Citation:
PMID:  22580277     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The Fas death receptor interacts with its ligand FasL and induces apoptosis. The Fas-FasL interaction occurs at the cell-cell interface in vivo, since both proteins are expressed in cell membranes. However, most studies on the Fas signal pathway have been performed in a nonphysiological manner by using soluble molecules (antibody or crosslinked FasL proteins) to stimulate Fas. The Fas-FasL interaction at the cell-cell contact site has only been studied recently, but the information derived from cell-cell interaction studies is still rather limited and not necessarily consistent with the past results. Therefore, we develop a novel reconstituted system that mimics the Fas-FasL interaction at cell-cell contact sites for further examination of the physiological Fas-FasL signaling system. By conjugating FasL extracellular domains to planar lipid bilayers, we created a model cell membrane to activate Fas-expressing cells. Using this system, we generated an image of Fas-FasL interactions at the cell-membrane interface at high resolution. We observed that the Fas-FasL interaction between two membranes creates submicron membrane microdomains. Shortly after microdomain formation, the cells exhibit various features of apoptosis. These results suggest that our reconstituted system provides a useful platform to dissect Fas-FasL apoptosis signaling at near physiological conditions.
Authors:
Ling Zhang; Yoshihisa Kaizuka; Nobutaka Hanagata
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-3
Journal Detail:
Title:  Biochemical and biophysical research communications     Volume:  -     ISSN:  1090-2104     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372516     Medline TA:  Biochem Biophys Res Commun     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Inc.
Affiliation:
Graduate School of Life Science, Hokkaido University, N10W8, Kita-ku, Sapporo 060-0812, Japan; WPI-MANA, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba Ibaraki 305-0047, Japan.
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