A zebrafish model for ocular tuberculosis.

A zebrafish model for ocular tuberculosis.
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DOI:
10.1371/journal.pone.0194982
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
Basu S
Basu S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Takaki K;Ramakrishnan L;Basu S

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在结核病流行的国家,眼结核病(TB)通常会导致严重的炎症和视力丧失。结核性感染在眼内形成的机制尚不清楚。我们建立了斑马鱼幼虫感染海洋分枝杆菌的模型,以研究眼结核病的早期发病机制。我们发现,血行性细菌播种的眼睛发生,尽管功能血视网膜屏障。典型的早期肉芽肿形成于对眼睛中的细菌的反应。这些肉芽肿涉及视网膜血管和视网膜色素上皮-脉络膜复合体,这是人类眼部TB的特征性部位。我们发现外周血单核细胞被募集到新生的眼部肉芽肿中,进一步表明眼部的免疫特权性质被这种炎性病灶破坏。
Ocular tuberculosis (TB) commonly causes severe inflammation and vision loss in TB-endemic countries. The mechanism by which tuberculous infection becomes established in the eye is poorly understood. We have developed the zebrafish larva infected with Mycobacterium marinum as a model to study the early pathogenesis of ocular TB. We find that hematogenous bacterial seeding of the eye occurs despite a functional blood retinal barrier. Prototypical early granulomas form in response to bacteria in the eye. These granulomas involve the retinal vasculature and retinal pigment epithelium-choroid complex which are characteristic locations for human ocular TB. We find that peripheral blood monocytes are recruited to the nascent ocular granuloma further suggesting that the immune privileged nature of the eye is breached by this inflammatory focus.
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