Abstract:
:The asymmetric transbilayer distribution of phospholipids in the plasma membrane and the regulation of phosphatidylserine (PS) exposure at the cell surface of animal cells are of high physiological significance. It has been shown previously that annexin V is one of the most sensitive tools with which the presence of small amounts of PS on the outer surface of eukaryotic cells can be detected. We present here the covalent coupling of annexin V molecules to magnetic nanoparticles of maghemite. The resulting annexin V-ferrofluid is used in the magnetic separation of PS exposing cells, as illustrated for human erythrocytes modified in their phospholipid transbilayer asymmetry by the use of a calcium ionophore. Results on stored human erythrocytes and comparison with results obtained using iodinated and fluorescein-labeled annexin V are also presented.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Geldwerth D,Helley D,de Jong K,Sabolovic' D,Sestier C,Roger J,Pons JN,Freyssinet JM,Devaux PF,Kuypers FAdoi
10.1006/bbrc.1999.0620subject
Has Abstractpub_date
1999-04-29 00:00:00pages
199-203issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(99)90620-4journal_volume
258pub_type
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