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Berberine Inhibits Arylamine N-Acetyltransferase Activity and Gene Expression in Salmonella Typhi

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Abstract

The effects of berberine on growth, arylamine N-acetyltransferase (NAT) activity, and gene expression in Salmonella Typhi (Typhi) were described. The growth inhibition of Typhi was determined by measuring absorbance by optical density (OD at 650 nm). The NAT activity was determined by measuring the levels of 2-aminofluorene (AF) and N-acetyl-2-aminofluorene (AAF) by high-performance liquid chromatography. The results demonstrated that 24-h berberine treatment decreased bacteria growth and amounts of AAF in Typhi. Western blotting and flow cytometry were used for examining the levels of NAT after bacteria were cotreated with or without various concentrations of berberine, and results indicated that berberine decreased the levels of NAT in Typhi. Polymerase chain reaction was used for examining the gene expression of NAT (mRNA NAT), and results indicated that berberine affects mRNA NAT1 expression in Typhi.

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Acknowledgments

This work was supported by grant CMU92-M-26 from China Medical University.

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Correspondence to Jing-Gung Chung.

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Wu, LT., Tsou, MF., Ho, CC. et al. Berberine Inhibits Arylamine N-Acetyltransferase Activity and Gene Expression in Salmonella Typhi. Curr Microbiol 51, 255–261 (2005). https://doi.org/10.1007/s00284-005-4569-7

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  • DOI: https://doi.org/10.1007/s00284-005-4569-7

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