Volume 23 Issue 11
Nov.  2025
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PU Qiaohong, YANG Tong, CHEN Junhu, CHEN Zhili, ZHOU Ying, SHA Congwei, ZHANG Shaojun, LIU Jie, PENG Tuohua. Exploring the activity and mechanism of Bidens pilosa L. extract against MRSA[J]. Chinese Journal of General Practice, 2025, 23(11): 1854-1858. doi: 10.16766/j.cnki.issn.1674-4152.004244
Citation: PU Qiaohong, YANG Tong, CHEN Junhu, CHEN Zhili, ZHOU Ying, SHA Congwei, ZHANG Shaojun, LIU Jie, PENG Tuohua. Exploring the activity and mechanism of Bidens pilosa L. extract against MRSA[J]. Chinese Journal of General Practice, 2025, 23(11): 1854-1858. doi: 10.16766/j.cnki.issn.1674-4152.004244

Exploring the activity and mechanism of Bidens pilosa L. extract against MRSA

doi: 10.16766/j.cnki.issn.1674-4152.004244
Funds:

 20222025

 20222023

 20231051

 A2022520

 A2022151

 A2023040

 B2024102

  • Received Date: 2025-04-23
    Available Online: 2026-01-07
  •   Objective  To evaluate the antibacterial activity of Bidens Pilosa L. extract against Methicillin-resistant Staphylococcus aureus (MRSA) and to elucidate its potential mechanism of action.  Methods  Oxford cup method and microbroth dilution method were used to evaluate the antibacterial effect of B. pilosa L. extract on S. aureus strain ATCC25923, MRSA standard strain ATCC43300, and fifty clinical MRSA isolates, and to determine the minimum inhibitory concentration (MIC). Changes in bacterial suspension conductivity and leakage of nucleic acids and soluble proteins were determined after the action of B. pilosa L. extract on MRSA. In addition, qRT-PCR technology was used to detect the expression changes of resistance-related genes.  Results  The MIC values of B. pilosa L. extract against ATCC25923, ATCC43300, and clinical MRSA strains were 125 mg/mL, 250 mg/mL, and 15.625-250 mg/mL, respectively. The extract of B. pilosa L. increased MRSA cell membrane permeability, leading to leakage of large molecules such as nucleic acids and soluble proteins. The extract of B. pilosa L. inhibited the expression of the biofilm-associated gene icaA.  Conclusion  The extract of B. pilosa L. can significantly inhibit the activity of MRSA. Its mechanism may be related to the impact on MRSA cell membrane permeability and suppression of biofilm-related gene expression.

     

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