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Evaluation of immuno-modulating effect of recombinant heat shock protein 40 of Brucella abortus in mice.


ABSTRACT: The present study was aimed to evaluate the immuno-modulatory effect of Brucella-specific recombinant HSP40 (rDnaJ) when co-immunized with Brucella rOmp22 in mice. For this, dnaJ of Brucella abortus was cloned, expressed in E. coli, and purified to homogeneity using Ni-NTA agarose columns. Three groups of mice (n?=?6 in each group) were used in the study. The control group was immunized with rOmp22 alone, while group 1 mice were injected subcutaneously with rOmp22 along with conventional adjuvants (FCA, FIA), and group 2 mice with rOmp22 mixed with rDnaJ. IgG isotype (IgG1 and IgG2a) response to rOmp22 immunization was evaluated by enzyme-linked immunosorbent assay which was found to be directed towards the cell-mediated arm of immune system (CMI) in group 2 mice in which rOmp22 was co-immunized with rDnaJ. Expression profiling of IL-4 and IL-12 was checked in all the groups by qRT PCR. IL12 mRNA was up-regulated to a greater extent in group2 mice, suggesting that the CMI arm of immune system was stimulated. Hence, it was concluded that CMI response against rOmp22 is stimulated to a greater extent in mice when co-immunized with Brucella rDnaJ.

SUBMITTER: Minhas P 

PROVIDER: S-EPMC6757077 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Evaluation of immuno-modulating effect of recombinant heat shock protein 40 of <i>Brucella abortus</i> in mice.

Minhas Priyanka P   Sunil Kumar B V BV   Verma Ramneek R  

3 Biotech 20190923 10


The present study was aimed to evaluate the immuno-modulatory effect of <i>Brucella</i>-specific recombinant HSP40 (rDnaJ) when co-immunized with <i>Brucella</i> rOmp22 in mice. For this, <i>dnaJ</i> of <i>Brucella abortus</i> was cloned, expressed in <i>E. coli,</i> and purified to homogeneity using Ni-NTA agarose columns. Three groups of mice (<i>n</i> = 6 in each group) were used in the study. The control group was immunized with rOmp22 alone, while group 1 mice were injected subcutaneously w  ...[more]

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