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Single recombinant anti-RhD IgG prevents RhD immunization.

Vaccine Weekly

| August 04, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2004 AUG 4 - (NewsRx.com & NewsRx.net) -- A single recombinant anti-RhD IgG prevents RhD immunization.

"A single recombinant immunoglobulin G1 (IgG1) anti-RhD antibody (MonoRho) was compared with a currently used polyclonal anti-RhD product (Rhophylac) in a phase 1 study for safety, efficacy of Rhesus D (RhD)-positive red blood cell (RBC) clearance, and prevention of RhD immunization in RhD-negative men challenged with 15 mL RhD-positive RBCs. Both the polyclonal product and recombinant anti-RhD effectively cleared RhD-positive RBCs after intravenous and intramuscular injection. The recombinant anti-RhD demonstrated a slower clearance rate compared with the polyclonal anti-RhD," investigators in Switzerland, Germany, and the Netherlands report.

"There was no dose response, and there was considerable variation among subjects who received the same dose of recombinant anti-RhD," said Sylvia Miescher at ZLB Bioplasma AG in Switzerland and collaborators in Switzerland, Germany, and the Netherlands. "Interestingly, RhD-positive RBC clearance rates were strongly associated with Fcgamma receptor IIA (FcgammaRIIA) and FcgammaIIA but not with FcgammaIIIB polymorphisms. Subjects homozygous for FcgammaRIIA-131H or FcgammaRIIIA-158V allotypes showed a ...

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Source: HighBeam Research, Single recombinant anti-RhD IgG prevents RhD immunization.

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