Chlamydia trachomatis plasmid-encoded protein pORF5 activates unfolded protein response to induce autophagy via MAPK/ERK signaling pathway
| Autor: | Shengmei Su, Fangzhen Luo, Mingyi Shu, Zhongyu Li, Yuqi Zhao, Yating Wen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
MAPK/ERK pathway endocrine system MAP Kinase Signaling System Biophysics Cellular homeostasis Chlamydia trachomatis medicine.disease_cause digestive system Biochemistry Host-Parasite Interactions 03 medical and health sciences 0302 clinical medicine Bacterial Proteins Autophagy medicine Humans Molecular Biology ATF6 Effector Chemistry Endoplasmic reticulum Cell Biology Endoplasmic Reticulum Stress Cell biology 030104 developmental biology 030220 oncology & carcinogenesis biological sciences Unfolded Protein Response Unfolded protein response HeLa Cells Plasmids |
| Zdroj: | Biochemical and Biophysical Research Communications. 527:805-810 |
| ISSN: | 0006-291X |
| DOI: | 10.1016/j.bbrc.2020.04.117 |
| Popis: | Chlamydia trachomatis (C. trachomatis) is an obligate intracellular organism that depends on nutrients from the host cell for their replication and proliferation. Therefore, the interaction between this pathogen and host induces sustained endoplasmic reticulum (ER) stress in the infected cells. Unfolded protein response (UPR) has been demonstrated to be activated by chlamydial secreted effectors, allowing host cells to recover from the stressful state. In this study, we attempted to explore the role of the only secreted plasmid-encoded protein pORF5 of C. trachomatis between UPR and autophagy induction. The results showed that three branches of UPR (PERK, IRE1, and ATF6) were activated by pORF5. pORF5-induced autophagy was repressed by UPR inhibitors GSK2606414 and 4μ8C, while the autophagy inhibition was failed to influence pORF5-induced UPR significantly. MAPK/ERK inhibitor PD98059 partially suppressed the pORF5-induced autophagy, but had little effect on UPR, indicating that pORF5 actives UPR to induce autophagy via the MAPK/ERK signaling pathway. These observations provide clues on how the host maintains the cellular homeostasis during C. trachomatis infection. |
| Databáze: | OpenAIRE |
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