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首页> 外文期刊>Ocular immunology and inflammation >The role of nitric oxide in resistance to P. aeruginosa ocular infection.
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The role of nitric oxide in resistance to P. aeruginosa ocular infection.

机译:一氧化氮在抵抗铜绿假单胞菌眼感染中的作用。

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PURPOSE: This study determined the role of inducible nitric oxide synthase (iNOS) and nitric oxide (NO) in the resistance response of BALB/c mice to P. aeruginosa-induced keratitis. METHODS: RT-PCR, nitrite detection, iNOS inhibition, ELISA, and immunohistochemistry were used. RESULTS: Early after infection, iNOS mRNA expression and nitrite levels in cornea were elevated compared to levels in the uninfected cornea. Treatment with aminoguanidine sulfate (AG), an inhibitor of iNOS, resulted in extensive corneal destruction, reduced nitrite levels, and reduced nitrotyrosine staining. Infected mice also had increased bacterial burden and elevated levels of MIP-1alpha, IL-1beta, and MIP-2 in the cornea. Dual-labeling immunohistochemistry established the macrophage as the major source of iNOS in the infected cornea. CONCLUSIONS: These data provide evidence that iNOS is constitutively expressed in the BALB/c cornea; that iNOS-derived NO is required for bacterial killing/stasis; and that the macrophage is the major cell source of NO.
机译:目的:本研究确定了诱导型一氧化氮合酶(iNOS)和一氧化氮(NO)在BALB / c小鼠对铜绿假单胞菌诱导的角膜炎的抗性反应中的作用。方法:采用RT-PCR,亚硝酸盐检测,iNOS抑制,ELISA和免疫组化。结果:感染后,与未感染的角膜相比,角膜中的iNOS mRNA表达和亚硝酸盐水平升高。用iNOS抑制剂硫酸氨基胍(AG)处理可导致广泛的角膜破坏,亚硝酸盐水平降低和硝基酪氨酸染色减少。受感染的小鼠还增加了细菌负担,并增加了角膜中MIP-1alpha,IL-1beta和MIP-2的水平。双重标记免疫组织化学确定巨噬细胞是感染的角膜中iNOS的主要来源。结论:这些数据提供了iNOS在BALB / c角膜中组成性表达的证据。细菌杀灭/停滞需要iNOS衍生的NO;并且巨噬细胞是NO的主要细胞来源。

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