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Comparative proteome analysis revealed the differences in responses of bovine alveolar macrophages to both M.tb and Mb infection

By Yurong Cai, Yong Li, Weifeng Gao, Pu Wang, Gang Zhang, Lingling Jiang

Posted 17 Jun 2021
bioRxiv DOI: 10.1101/2021.06.16.448489

Bovine tuberculosis, caused by both MTB(Mycobacterium tuberculosis) and MB(Mycobacterium bovis), is one of the most serious zoonotic diseases in the world. Both pathogenic MTB and MB interact closely with the host alveolar macrophages. However, the mechanisms of defense response of macrophages to MTB or MB still need further researches. Presently, in-depth comparative proteome analysis was performed on the MB- and MTB- infected macrophage. We identified that macrophages was more sensitive to the MB infection. Both pathogens could induce strong energy metabolism of macrophages. To eliminate MB and protect the host, a bunch of proteins and signaling which involved in autophagy- and inflammatory-related progresses were highly activated in macrophages following MB infection. In contrast, only proteins relevant to energy metabolisms were highly expressed in macrophages following MTB infection. In summary, we proposed that macrophages were more sensitive to MB attacks and could deployed proteins functioned in autophagy- and inflammatory-related progresses to protect the host. Our research provide a novel insight into the different mechanisms of defense responses of macrophages to both MTB and MB infection.

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