Delivery of Bordetella pertussis adenylate cyclase toxin to target cells via outer membrane vesicles.

Delivery of Bordetella pertussis adenylate cyclase toxin to target cells via outer membrane vesicles.
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DOI:
10.1016/j.febslet.2012.01.032
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发表时间:
2012-02-17
期刊:
影响因子:
3.5
通讯作者:
Hewlett EL
Hewlett EL
中科院分区:
生物学3区
文献类型:
--
作者:
Donato GM;Goldsmith CS;Paddock CD;Eby JC;Gray MC;Hewlett EL

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百日咳博德特氏菌腺苷酸环化酶毒素(ACT)通过产生细胞内环磷腺苷(cAMP)使细胞中毒。百日咳博德特氏菌外膜囊泡(OMV)在其表面含有ACT(OMV - ACT),但OMV - ACT的特性此前未知。我们发现,在一例致命的百日咳病例的肺部,百日咳博德特氏菌含有OMV,这表明其参与了发病机制。OMV - ACT和ACT可使有和没有该毒素受体CD11b/CD18的细胞中毒。ACT导致的中毒可被抗毒素和抗CD11b抗体阻断,但不被细胞松弛素 - D阻断;相比之下,OMV - ACT不受这两种抗体的影响,但可被细胞松弛素 - D阻断。因此,OMV - ACT可以通过与单独的ACT不同的过程传递ACT。
B.pertussis adenylate cyclase toxin (ACT) intoxicates cells by producing intracellular cAMP. B.pertussis outer membrane vesicles (OMV) contain ACT on their surface (OMV-ACT), but the properties of OMV-ACT were previously unknown. We found that B.pertussis in the lung from a fatal pertussis case contains OMV, suggesting an involvement in pathogenesis. OMV-ACT and ACT intoxicate cells with and without the toxin’s receptor CD11b/CD18. Intoxication by ACT is blocked by antitoxin and anti-CD11b antibodies, but not by cytochalasin-D; in contrast, OMV-ACT is unaffected by either antibody and blocked by cytochalasin-D. Thus OMV-ACT can deliver ACT by processes distinct from those of ACT alone.
DOI: 10.1099/00221287-63-2-211
发表时间: 1970-01-01
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