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Qualitative Indicators of Experimental Brucellosis Antigen Preparations Designed for Cellular Tests in vitro

https://doi.org/10.21055/0370-1069-2020-3-83-88

Abstract

In order to develop the most diagnostically informative methods for carrying out antigen-stimulated cellular tests in vitro a careful selection of stimulating agent (antigen) is required, possessing an adequate activating potential and providing specificity of the reaction.

Objective of the study was to identify the qualitative indicators of experimental batches of brucellosis antigen preparations designed for cellular tests in vitro.

Materials and methods. Initially we produced antigen complexes of brucellosis microbe on the basis of the vaccine strains of three epidemically significant Brucella species (B. abortus, B. melitensis, B. suis). Quantitative determination of WsAg and PPBC proteins of experimental preparation series was performed applying capillary electrophoresis. Qualitative composition was assessed through ion exchange liquid chromatography with refractometric detection.

Results and discussion. We have specified physical-chemical features, investigated chromatographic profiles and composition of protein fractions, as well as tried the produced experimental batches of brucellosis antigen preparations. After analyzing the defined protein and polysaccharide composition of the obtained WsAg samples, one can conclude that WsAg preparation cannot be used for cellular tests as the probability of non-specific lymphocyte reaction manifestation in vitro was experimentally proven. By contrast, complex brucellosis antigen preparation PPBC has an expressed specific activity and specificity under in vitro conditions and the prospects to be used when developing methodological approaches for laboratory diagnosis of brucellosis and assessment of de facto immunity rate in risk contingents after vaccination. The obtained parameters will allow for proper quality provision when manufacturing the developed experimental PPBC preparation designed for cellular tests in vitro, taking into account modern validation and standardization regulations. 

About the Authors

S. A. Kurcheva
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


D. A. Kovalev
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


D. G. Ponomarenko
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


Yu. V. Siritsa
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


M. V. Kostyuchenko
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


A. G. Koshkid’ko
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


I. V. Zharnikova
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


E. L. Rakitina
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


O. V. Logvinenko
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


A. M. Zhirov
Stavropol Research Anti-Plague Institute
Russian Federation
13–15, Sovetskaya St., Stavropol, 355035, Russian Federation


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Review

For citations:


Kurcheva S.A., Kovalev D.A., Ponomarenko D.G., Siritsa Yu.V., Kostyuchenko M.V., Koshkid’ko A.G., Zharnikova I.V., Rakitina E.L., Logvinenko O.V., Zhirov A.M. Qualitative Indicators of Experimental Brucellosis Antigen Preparations Designed for Cellular Tests in vitro. Problems of Particularly Dangerous Infections. 2020;(3):83-88. (In Russ.) https://doi.org/10.21055/0370-1069-2020-3-83-88

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ISSN 0370-1069 (Print)
ISSN 2658-719X (Online)