Flow-cytometric method for the quantitation of the Fc function of intravenous immunoglobulin preparations.

Abstract:

OBJECTIVES:We have developed and optimised a new flow-cytometric method for the measurement of the Fc function of intravenous immunoglobulin (IVIg) preparations, which is important in predicting the effector function of immunoglobulin (Ig) in such preparations. MATERIALS AND METHODS:Ig was bound to a monocytic cell line, THP-1 with Fc gammaRI and Fc gammaRII cell surface receptors, and the bound Ig detected by FITC-conjugated F(ab)2 fragment of rabbit anti-human IgG. RESULTS:Validation studies showed that Ig bound to the cell line through the Fc portion. The method detected alterations in Fc function caused by reduction with dithiothreitol or by storage. The method was reproducible (CV<11%) and a limited comparison study showed that it correlated with the European Pharmacopoeia reference method. CONCLUSIONS:This technically simple method is suitable for the quantitation of the Fc function of Ig preparations.

journal_name

Vox Sang

journal_title

Vox sanguinis

authors

Ramasamy I,Tran E,Charnock A,Farrugia A

doi

10.1159/000031178

subject

Has Abstract

pub_date

2000-01-01 00:00:00

pages

185-93

issue

3

eissn

0042-9007

issn

1423-0410

pii

31178

journal_volume

78

pub_type

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