التفاصيل البيبلوغرافية
| العنوان: |
Type three secretion system-mediated escape of Burkholderia pseudomallei into the host cytosol is critical for the activation of NFkappaB. |
| المؤلفون: |
Boon Eng Teh, French, Christopher Todd, Yahua Chen, Gek Joo Chen, Isabelle, Ting-Hsiang Wu, Sagullo, Enrico, Pei-Yu Chiou, Teitell, Michael A., Miller, Jeff F., Yunn-Hwen Gan |
| المصدر: |
BMC Microbiology; 2014, Vol. 14 Issue 1, p1-27, 27p |
| مصطلحات موضوعية: |
BURKHOLDERIA pseudomallei, CYTOSOL, SECRETION, GRAM-negative bacteria, MELIOIDOSIS |
| مصطلحات جغرافية: |
SOUTHEAST Asia, NORTHERN Australia |
| مستخلص: |
Background Burkholderia pseudomallei is the causative agent of melioidosis, a potentially fatal disease endemic in Southeast Asia and Northern Australia. This Gram-negative pathogen possesses numerous virulence factors including three “injection type” type three secretion systems (T3SSs). B. pseudomallei has been shown to activate NFκB in HEK293T cells in a Toll-like receptor and MyD88 independent manner that requires T3SS gene cluster 3 (T3SS3 or T3SSBsa). However, the mechanism of how T3SS3 contributes to NFκB activation is unknown. Results Known T3SS3 effectors are not responsible for NFκB activation. Furthermore, T3SS3-null mutants are able to activate NFκB almost to the same extent as wildtype bacteria at late time points of infection, corresponding to delayed escape into the cytosol. NFκB activation also occurs when bacteria are delivered directly into the cytosol by photothermal nanoblade injection. Conclusions T3SS3 does not directly activate NFκB but facilitates bacterial escape into the cytosol where the host is able to sense the presence of the pathogen through cytosolic sensors leading to NFκB activation. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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