Open AccessEFFECT OF EXTRACHROMOSOMAL ELEMENTS OF HEREDITY ON TOXIC PROPERTIES OF YERSINIA PESTIS
Author(s) -
Г. В. Демидова,
Е. П. Соколова,
V. P. Zyuzina,
В. А. Рыкова,
Irina Morozova,
О. Н. Подладчикова,
V. I. Tynyanova
Publication year - 2017
Publication title -
žurnal mikrobiologii, èpidemiologii i immunobiologii
Language(s) - English
Resource type - Journals
eISSN - 2686-7613
pISSN - 0372-9311
DOI - 10.36233/0372-9311-2017-2-28-33
Subject(s) - yersinia pestis , extrachromosomal dna , virulence , plasmid , microbiology and biotechnology , biology , bacteria , plague (disease) , virology , lipopolysaccharide , genetics , gene , immunology , medicine , pathology
Aim. Elucidation of the role of extrachromosomal elements of heredity in manifestations of toxic properties of Yersinia pestis. Materials and methods. The study was carried out in vaccine strain Y. pestis EV76 (pMTl, pCDl, pPCPl) and non-plasmid variants of vaccine EV76 (pMTl\ pCDl', pPCPl') and virulent 231 (рМТГ, pCDl’, pPCPl') strains of Y. pestis. Presence of functionally active form of lipopolysaccharide (LPS) in the incubation medium of the bacteria was evaluated via toxicity of supernatant of Y. pestis for intact animals (infection-toxic shock) and mice sensitized by D-GalN. Results. 37°C cultures of Y. pestis EV76 containing a full amount of plasmids were established to release LPS into the environment. Non-plasmid variants of both vaccine and virulent strains of Y. pestis pMTl', pCD Г, рРСР 1 do not have this ability. Separation of LPS from cell wall was detected in live bacteria of plague infectious agent. This process is assumed to be coupled with translocation of proteins coded by pMTl, pCDl, pPCPl plasmids from the cell into the environment. Conclusion. Functional interconnection between extrachromosomal elements of heredity and toxic activity of Y. pestis LPS is established for the first time.