The Role of C-X-C Chemokines in Staphylococcus aureus Endophthalmitis.

The Role of C-X-C Chemokines in Staphylococcus aureus Endophthalmitis.
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DOI:
10.1167/iovs.64.3.10
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发表时间:
2023-03-01
影响因子:
4.4
通讯作者:
--
中科院分区:
医学2区
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--
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为了验证趋化因子C - X - C家族中的CXCL1、CXCL2和CXCL10在金黄色葡萄球菌眼内炎期间促进炎症这一假说, 将5000个金黄色葡萄球菌菌落形成单位通过玻璃体内注射到C57BL/6J、CXCL1 - / -、CXCL2 - / -或CXCL10 - / -小鼠的眼中,诱导产生金黄色葡萄球菌眼内炎。在感染后12、24和36小时,对细菌数量、眼内炎症和视网膜功能进行评估。基于这些结果,在金黄色葡萄球菌感染的C57BL/6J小鼠中评估玻璃体内给予抗 - CXCL1在减轻炎症和改善视网膜功能方面的有效性。 我们观察到,在金黄色葡萄球菌感染后12小时,与C57BL/6J小鼠相比,CXCL1 - / -小鼠的炎症显著减轻,视网膜功能改善,但在24小时或36小时则没有这种情况。然而,在感染后12小时,抗 - CXCL1抗体与金黄色葡萄球菌共同给药并没有改善视网膜功能或减轻炎症。在CXCL2 - / -和CXCL10 - / -小鼠中,感染后12小时和24小时的视网膜功能和眼内炎症与C57BL/6J小鼠相比没有显著差异。在12、24或36小时,CXCL1、CXCL2或CXCL10的缺失并没有改变眼内金黄色葡萄球菌的浓度。 CXCL1似乎有助于宿主对金黄色葡萄球菌眼内炎的早期固有免疫反应,但使用抗 - CXCL1治疗并不能有效限制这种感染中的炎症。CXCL2和CXCL10在金黄色葡萄球菌眼内炎早期阶段的炎症过程中似乎没有起到关键作用。
To test the hypothesis that the C-X-C chemokines CXCL1, CXCL2, and CXCL10 contribute to inflammation during Staphylococcus aureus endophthalmitis. S. aureus endophthalmitis was induced by intravitreal injection of 5000 colony forming units of S. aureus into the eyes of C57BL/6J, CXCL1−/−, CXCL2−/−, or CXCL10−/− mice. At 12, 24, and 36 hours postinfection, bacterial counts, intraocular inflammation, and retinal function were assessed. Based on these results, the effectiveness of intravitreal administration of anti-CXCL1 in reducing inflammation and improving retinal function was evaluated in S. aureus–infected C57BL/6J mice. We observed significant attenuation of inflammation and improvement in retinal function in CXCL1−/− mice relative to C57BL/6J at 12 hours but not at 24 or 36 hours postinfection with S. aureus. Co-administration of anti-CXCL1 antibodies with S. aureus, however, did not improve retinal function or reduce inflammation at 12 hours postinfection. In CXCL2−/− and CXCL10−/− mice, retinal function and intraocular inflammation were not significantly different from those of C57BL/6J mice at 12 and 24 hours postinfection. At 12, 24, or 36 hours, an absence of CXCL1, CXCL2, or CXCL10 did not alter intraocular S. aureus concentrations. CXCL1 appears to contribute to the early host innate response to S. aureus endophthalmitis, but treatment with anti-CXCL1 did not effectively limit inflammation in this infection. CXCL2 and CXCL10 did not seem to play an integral role in inflammation during the early stages of S. aureus endophthalmitis.
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