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Acta Biochimica et Biophysica Sinica
Year: 2010  |  Volume: 42  |  Issue: 3  |  Page No.: 177 - 182

Autophagy promotes BCG-induced maturation of human dendritic cells

Y Min, W Xu, D Liu, S Shen, Y Lu, L Zhang and H. Wang    

Abstract:

Dendritic cells (DCs) are important for the initiation of the adaptive immune response against Mycobacterium tuberculosis. Autophagy is an innate and adaptive defense mechanism and important for the control of M. tuberculosis. However, the role of autophagy in the adaptive immune response against M. tuberculosis remains to be determined. In the present study, we studied the effects of autophagy on the maturation of DCs infected with Bacillus Calmette–Guérin (BCG). The phenotype and function of the DCs were assessed by measuring the expression of CD86 and HLA-DR and the secretion of IL-10 and IL-6. Autophagy was evaluated by the change in LC3II, a molecular marker for autophagy. Following stimulation of autophagy, DCs that were matured in the presence of BCG showed enhanced expression of CD86 and HLA-DR and increased IL-6 production. The expression of LC3II was increased after the stimulation of autophagy. These results demonstrated that autophagy might result in the increased maturation of BCG-infected DCs, suggesting that autophagy could contribute to an enhanced adaptive immune response against M. tuberculosis.

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