MONOCLONAL ANTIBODIES TO RUBELLA VIRUS GLYCOPROTEIN E1


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Aim. To obtain monoclonal antibodies (MCAs) to glycoprotein E 1 of rubella virus, to assess their immunochemical characteristics and ability to use fluorescent MCA for rapid identification of rubella virus. Materials and methods. Rubella virus strain C-74 (Moscow), vaccine strains «Orlov» (Saint-Petersburg), Wistar RA 27/3 (USA) as well as strain Judith (Germany) were used. Viral antigens were obtained using diploid cells L-68 and cell lines VNK-21-F and Vero E6. MCAs were produced by conventional method and their isotype was determined: Immunoblotting, immunoenzume assay (IEA), hemagglutination inhibition assay (HIA) and immunofluorescence assay (IFA) were performed. Results. Five monoclonal antibodies — Kh-252.1, Kh-347.2, Kh-183.3, Kh-214.4, Kh-187.5 — to antigens of rubella virus strain C-74 were obtained. Isotypes of these antibodies were determined and their reactivity with native and denaturated antigens of other strains («Orlov», Wistar RA 27/3, Judith) was characterized. IEA showed that all MCAs interacted with rubella virus glycoprotein E1 at high titers ranging from 1/1600 to 1/200,000. Immunoblotting demonstrated that 4 MCAs (Kh-252.1, Kh-347.2, Kh-183.3, Kh-214.4) had aforementioned feature. MCAs inhibited hemagglutinating activity of Judith strain in titer from 1/16 to 1/1024 in HIA. FITC conjugate of MCA Kh-347.2 (most sensitive variant) allowed to detect rubella virus in infected Vero E6 cells after 24 hours since infection, whereas FITC conjugates of 3 MCAs (Kh-183.3, Kh-214.4, Kh- 187.5) — after 72 hours since infection. Conclusion. Use of FITC conjugates of MCAs is a perspective tool for identification of rubella virus glycoprotein E1 in infected cell cultures and nasopharyngeal swabs.

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МОНОКЛОНАЛЬНЫЕ АНТИТЕЛА К ГЛИКОПРОТЕИНУ Е1 ВИРУСА КРАСНУХИ
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About the authors

F. G Nagieva

Mechnikov Research Institute of Vaccines and Sera

V. G Nikulina

Mechnikov Research Institute of Vaccines and Sera

E. P Barkova

Mechnikov Research Institute of Vaccines and Sera

A. V Zubkov

Mechnikov Research Institute of Vaccines and Sera

N. S Kuz'mina

Mechnikov Research Institute of Vaccines and Sera

R. G Desyatskova

Mechnikov Research Institute of Vaccines and Sera

A. V Tkachenko

Mechnikov Research Institute of Vaccines and Sera

T. N Yunasova

Tarasevich State Institute for Standardization and Control of Immunobiologicals, Moscow, Russia

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Copyright (c) 2011 Nagieva F.G., Nikulina V.G., Barkova E.P., Zubkov A.V., Kuz'mina N.S., Desyatskova R.G., Tkachenko A.V., Yunasova T.N.

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