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A protective chimeric antibody to tick-borne encephalitis virus

Ivan K Baykov1, Andrey L Matveev1, Oleg V Stronin2

  • 1Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of Russian Academy of Sciences, prosp. Lavrentieva 8, Novosibirsk 630090, Russia.

Vaccine
|May 20, 2014
PubMed

The efficiency of several mouse monoclonal antibodies (mAbs) specific to the tick-borne encephalitis virus (TBEV) glycoprotein E in post-exposure prophylaxis was assessed, and mAb14D5 was shown to be the most active of all those studied. It was proven that the hybridoma cell line 14D5 produced one immunoglobulin H chain and two L chains. They were used to construct chimeric antibodies ch14D5a and ch14D5b, the affinity constants of which were 2.6 × 10(10)M(-1) and 1.0 × 10(7)M(-1), respectively, according to the SPR-based ProteOn biosensor assay. The neutralization index (IC50) of ch14D5a was 0.04 μg/ml in the focus reduction neutralization test. In in vivo experiments, ch14D5a at a dose of 10 μg/mouse resulted in a 100% survival of the mice infected with 240 LD50 of TBEV. This chimeric antibody is promising for further development of prevention and therapeutic drugs against TBEV.

Keywords:
Affinity constantChimeric antibodyIn vivo protectionPost-exposure prophylaxisTick-borne encephalitis virusVirus neutralization

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