Low Concentration of Wenyang Tonglin Decoction Promotes Conjugation and Transfer of Drug-Resistant Plasmids among Heterologous Strains  

作　　者：WANG Bi-yan BU Hong-shi XIA Li-bo JIANG Xiang-yu TONG Yan-qing 

机构地区：[1]Department of Traditional Chinese Medicine,Changchun University of Traditional Chinese Medicine,Changchun,130000,China

出　　处：《Chinese Journal of Integrative Medicine》2024年第8期721-728,共8页中国结合医学杂志（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.81873070)。

摘　　要：Objective To investigate the effect of low concentration of Wenyang Tonglin Decoction(WTD)on the binding conditions of R45 plasmid conjugative transfer under liquid phase conjugation and its mechanism.Methods Escherichia coli CP9(R45)and Staphylococcus aureus RN450RF were cultured in medium containing WTD,and their minimum inhibitory concentration(MIC)values were obtained.Using promoter fusion technology,E.coli CP9(R45)containing a promoter fusion was obtained.β-Galactosidase activity of TrfAp and TrbBp was tested,and the mRNA expression of regulatory factors(TrbA,KorA,and KorB)was detected by real-time fluorescent quantitative polymerase chain reaction.Results The MIC of E.coli CP9(R45)was 400 g/L and that of S.aureus RN450RF was 200 g/L.When the drug concentration in the culture medium was 200 g/L,the highest number of conjugants was(3.47±0.20)×10^(7) CFU/mL At 90 h of conjugation,the maximum number of conjugants was(1.15±0.06)×10^(8) CFU/mL When the initial bacterial concentration was 10^(8) CFU/mL,the maximum number of conjugants was(3.47±0.20)×10^(7) CFU/mL.When the drug concentration was 200 g/L,theβ-galactosidase activity of TrfAp and TrbBp significantly increased;the relative quantification of TrbA,KorA and KorB were significantly inhibited.Conclusion Low concentration of WTD promoted the development of bacterial resistance by affecting promoters and inhibiting the expression of regulatory factors.

关 键 词：urinary tract infection Chinese medicine drug-resistant plasmid heterozygous strains CONJUGATION transfer 

分 类 号：R285[医药卫生—中药学]