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1.湖北工业大学,武汉 430068
2.中国中医科学院 医学实验中心,北京 100700
3.吉林农业大学,长春 130118
Received:15 December 2020,
Published Online:10 March 2021,
Published:05 May 2021
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童倩,王毅,周金鹤等.亚抑菌浓度痰热清注射液抑制金黄色葡萄球菌α-溶血素溶血活力[J].中国实验方剂学杂志,2021,27(09):86-93.
TONG Qian,WANG Yi,ZHOU Jin-he,et al.Study on Sub-minimal Inhibitory Concentration of Tanreqing Injection in Inhibiting Hemolytic Activity of Staphylococcus aureusα-hemolysin[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(09):86-93.
童倩,王毅,周金鹤等.亚抑菌浓度痰热清注射液抑制金黄色葡萄球菌α-溶血素溶血活力[J].中国实验方剂学杂志,2021,27(09):86-93. DOI: 10.13422/j.cnki.syfjx.20210605.
TONG Qian,WANG Yi,ZHOU Jin-he,et al.Study on Sub-minimal Inhibitory Concentration of Tanreqing Injection in Inhibiting Hemolytic Activity of Staphylococcus aureusα-hemolysin[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(09):86-93. DOI: 10.13422/j.cnki.syfjx.20210605.
目的
2
研究痰热清注射液(TRQ)在亚抑菌浓度下是否抑制金黄色葡萄球菌
α
-溶血素的产生、释放,进而缓解感染过程中机体损伤,为更好地指导临床用药提供实验依据。
方法
2
微孔板法和时间-生长曲线首先测定TRQ对金黄色葡萄球菌的最小抑菌浓度(MIC)和对细菌生长的影响;而后不同亚抑菌浓度TRQ与细菌或细菌上清共培养,再与脱纤维兔血共孵育,检测TRQ对金黄色葡萄球菌
α
-溶血素的抑制和中和作用;细胞增殖与活性检测(CCK-8)法检测TRQ对金黄色葡萄球菌感染介导的人肺泡上皮细胞(A549)损伤的保护作用;实时荧光定量聚合酶链式反应(Real-time PCR)检测亚抑菌浓度TRQ对金黄色葡萄球菌
α
-溶血素调控基因hla,agrA mRNA表达的影响。
结果
2
TRQ对金黄色葡萄球菌的MIC为1/8原液,亚抑菌浓度(1/64MIC~1/16MIC)TRQ不影响细菌生长;1/64MIC~1/16MIC浓度TRQ具有抑制和中和
α
-溶血素溶血活力的作用,且对金黄色葡萄球菌感染介导的A549细胞损伤具有保护作用;其对
α
-溶血素的抑制作用与抑制hla,agrA mRNA表达密切相关。
结论
2
亚抑菌浓度TRQ能抑制和中和金黄色葡萄球菌的
α
-溶血素溶血活力,对金黄色葡萄球菌感染介导的A549细胞损伤具有保护作用,其抑制
α
-溶血素的机制与干扰agr调控系统密切相关。
Objective
2
To study whether Tanreqing injection (TRQ) can alleviate the body injury in the process of infection by inhibiting the production and release of
α
-hemolysin of
Staphylococcus aureus
under sub-minimal inhibitory concentration, and to provide experimental basis for better guidance of clinical medication.
Method
2
The effects of TRQ on the minimum inhibitory concentration (MIC) and bacterial growth of
S.aureus
were determined firstly by microplate method and time-growth curve. The different sub-minimal inhibitory concentrations of TRQ were co-cultured with bacteria or bacterial supernatants, and then co-incubated with defibrillated rabbit blood to detect the inhibitory and neutralizing effects of TRQ on
S.aureus
α
-hemolysin. Cell counting kit-8 (CCK-8) cell viability assay was used to detect the protective effect of TRQ on
S. aureus
-mediated damage to human alveolar epithelial cells (A549). Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) was used to detect the effect of sub-minimal inhibitory concentration of TRQ on the mRNA expression of
S.aureus
α
-hemolysin regulatory genes hla and agrA.
Result
2
The MIC of TRQ to
S.aureus
was 1/8 of the stock solution, and the sub-minimal inhibitory concentration (1/64MIC-1/16MIC) TRQ used in this study did not affect the growth of bacteria. 1/64MIC-1/16 MIC TRQ had the effect of inhibiting and neutralizing the hemolytic activity of
α
-hemolysin, with a protective effect on
S.aureus
supernatant-mediated A549 cell damage, and its inhibitory effect on
α
-hemolysin was closely related to the inhibition of hla and agrA mRNA expression.
Conclusion
2
The sub-minimal inhibitory concentration TRQ can inhibit and neutralize the hemolytic activity of
α
-hemolysin of
S.aureus
, with a protective effect on A549 cell damage mediated by
S.aureus
infection, and its mechanism of inhibiting
α
-hemolysin is closely related to the interference with agr regulatory system.
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