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- W2024448321 abstract "We have previously reported that mice immunized with the mycobacterial 27-kDa lipoprotein were more susceptible to Mycobacterium tuberculosis (Mtb) challenge. We also showed that 27-kDa lipoprotein abrogated the protection afforded by the BCG vaccine when administrated together, suggesting that the 27-kDa lipoprotein may modulate the course of experimental mycobacterial infection. In this study, we address the role of the 27-kDa lipoprotein in modulating the immune response to mycobacteria. Our results show that co-administration of BALB/c mice with Mtb and the 27-kDa lipoprotein (Mtb+27kDa), but not its non-acylated form, increases the susceptibility of mice to Mtb infection. Significantly lower DTH reaction and splenocyte proliferation to PPD stimulation were also observed in Mtb+27kDa-infected mice compared to Mtb-infected mice. Furthermore, during infection, splenocytes and purified T cells lost their ability to proliferate in response to concanavalin A stimulation more rapidly in the Mtb+27kDa-infected mice, which was accompanied by high IFN-gamma and NO production, but low TNF-alpha secretion levels. Addition of L-NMMA, anti-IFN-gamma and anti-TNF-alpha antibodies restored in vitro proliferative responses of T cells from Mtb+27kDa-infected mice. Short-term L-NMMA treatment of Mtb+27kDa-infected mice prevented the 27-kDa-mediated immunosuppression and increase in susceptibility to Mtb. Altogether, these data suggest that the 27-kDa lipoprotein plays a role in Mtb infection by inducing increased suppression of the immune response due to elevated NO production." @default.
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- W2024448321 date "2006-06-01" @default.
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- W2024448321 title "Aggravated infection in mice co-administered with Mycobacterium tuberculosis and the 27-kDa lipoprotein" @default.
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- W2024448321 doi "https://doi.org/10.1016/j.micinf.2006.02.011" @default.
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