Масс-спектрометрический анализ белковых экстрактов крови животных при экспериментальном бруцеллезе

Aim . The aim of the present research was to study the possibility of direct detection of the causative agent of brucellosis in a biomaterial under experimental conditions via the MALDI-TOF MS method using Mass-Up program resources and a set of packages for open-source statistical software R. Materials and methods . We used laboratory mice infected with the causative agents of Brucellosis (strains B. melitensis 548, B. abortus 544, B. suis 1330 ) as models. Protein profiling was performed on a MALDI-TOF Microflex «Bruker Daltonics» mass spectrometer. Results . The bioinformatic-statistical approach used for analyzing MALDI-TOF mass spectra allows to carry out a direct detection of Brucella in the biomaterial; besides, it is possible to determinate their species via the identification of a group of biomarkers. Conclusion. It was experimentally confirmed that the protein profiles of the blood extracts of infected animals contain 11 markers, including 6 genus specific for Brucella spp., which can be associated with Brucella infection.