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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/17893

Title: Intravenous immunoglobulin inhibits anti-glycoprotein IIb-induced platelet apoptosis in a murine model of immune thrombocytopenia
Authors: Leytin, V
Mykhaylov, S
Starkey, AF
Allen, DJ
Lau, H
Ni, H
Semple, JW
Lazarus, AH
Freedman, J
Department: Laboratory Medicine and Pathobiology
Physiology
St. Michael's Hospital
Keywords: murine model
immune thrombocytopenia
anti-glycoprotein IIb
intravenous immunoglobulin
platelet apoptosis
Issue Date: 1-Apr-2006
Publisher: Blackwell Publishing
Citation: Leytin V et al. Intravenous immunoglobulin inhibits anti-glycoprotein IIb-induced platelet apoptosis in a murine model of immune thrombocytopenia. Br J Haematol. 2006;133(1):78-82.
Abstract: We have previously shown that injection of anti-glycoprotein (GP) IIb induces murine immune thrombocytopenia (ITP) and that intravenous immunoglobulin (IVIg) ameliorates ITP. We hypothesise that murine ITP may be associated with platelet apoptosis, which is upregulated by anti-GPIIb and downregulated by IVIg. The current study demonstrated that anti-GPIIb injection induced three critical apoptosis manifestations in platelets: (i) mitochondrial inner transmembrane potential (delta psi m) depolarisation; (ii) caspase-3 activation; and (iii) phosphatidylserine (PS) exposure. IVIg administration inhibited caspase-3 activation and PS exposure, but not delta psi m-depolarisation, in anti-GPIIb-treated platelets, demonstrating that IVIg ameliorates thrombocytopenia concomitantly with inhibiting late, but not early mechanisms of platelet apoptosis.
URI: http://dx.doi.org/10.1111/j.1365-2141.2006.05981.x
http://hdl.handle.net/1807/17893
ISSN: 0007-1048
Appears in Collections:Faculty Publications

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