2014  0,718
2013  0,739
2012  0,637
2011  0,658
2010  0,654
2009  0,570
2008  0,849
2007  0,805
2006  0,330
2005  0,435
2004  0,623
2003  0,567
2002  0,641
2001  0,490
2000  0,477
1999  0,762
1998  0,785
1997  0,507
1996  0,518
1995  0,502
Vol 51(2017) N 5 p. 687-694; DOI 10.1134/S0026893317050193 Full Text

A.V. Tkachenko1, O.S. Troitskaya1,2, D.V. Semenov1, E.V. Dmitrienko1,2, E.V. Kuligina1, V.A. Richter1, O.A. Koval1,2*

Immunogenicity of recombinant analog of antitumor protein lactaptin

1Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia

Received - 2016-07-05; Accepted - 2016-12-01

Therapeutic monoclonal antibodies and recombinant proteins including cytokines are commonly used in the treatment of cancer and inflammatory diseases. In most cases, these protein-based drugs exhibit a high therapeutic efficacy, which is unfortunately frequently associated with a variety of side effects. We have investigated the in vitro and in vivo immunogenicity of recombinant antitumor protein lactaptin (RL2). Based on the qRT-PCR analysis, we have shown that, in MDA-MB-231 human breast adenocarcinoma cells, RL2 suppresses the NF-kB signaling cascade that regulates the reactions of innate immunity. RL2 inhibits the expression of the CXCL1 protein and apoptosis inhibitor A20 and enhances expression of IkB, NF-kB repressor. The ELISA method has been used to evaluate the antibody titer in the blood of mice, which received single and triple intravenous or intraperitoneal injections of RL2. The multiplex immunoassay of 23 cytokines in the mice blood has shown that the RL2 injections lead to a slight increase in the levels of systemic pro-inflammatory cytokine interleukin-5 (IL-5) and keratinocyte chemoattractant (KC), a homologue of human macrophage inflammatory protein-1 (MIP-1). These observations indicate the low immunogenicity of the recombinant lactaptin analog, which can be considered to be a potential molecular drug candidate for further clinical development.

Lactaptin, therapeutic proteins, immune response, NF-kB, cytokines, neutralizing antibody, multiplex analysis