Inflammatory mechanism of Chlamydia trachomatis-infected HeLa229 cells regulated by Atg5.

The relation between autophagy and Chlamydia trachomatis infection remain inconclusive. In order to further understand the role of autophagy in C. trachomatis-infected cells. Atg5 silenced HeLa229 cell line was used to establish an autophagy inhibition C. trachomatis infection model. The results suggested that Atg5 served a key regulatory role in the autophagy of C. trachomatis-infected cells. Silencing Atg5 significantly inhibited the autophagy level of the infected cells. Furthermore, Atg5 knockdown led to increased secretion of proinflammatory cytokines IL-1β, IL-6, IFN-γ and TNF-α, and decreased secretion of anti-inflammatory cytokine IL-10 in C. trachomatis-infected cells after autophagy induction, which suggested the anti-inflammatory role of autophagy during chlamydia infection. This study reveals some physiological and pathological roles of autophagy during C. trachomatis infection, which would provide clues in the treatment of chronic chlamydia infection.