Related Experiment Video
Updated: May 15, 2025

Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations
Published on: July 24, 2021
Exploring alternative therapeutic options for multidrug-resistant N. Gonorrhoeae: the potential of
Yuqiu Qi1, Qinghui Xie2, Jingxia Lin3
1Department of Pharmacy, The First Affiliated Hospital of Naval Medical University, Shanghai, China.
Objectives:
Neisseria gonorrhoeae (NG), a bacterium characterised by multidrug resistance, is traditionally treated with ceftriaxone, either as a monotherapy or in conjunction with azithromycin. However, the emergence of strains resistant to these antibiotics presents a considerable challenge to current therapeutic approaches, which necessitates the exploration of alternative treatment strategies.
Methods:
Agar dilution and broth microdilution to determine the minimum inhibitory concentrations (MICs) of antibiotics and 7,8-dihydroxyflavone. The development of 7,8-dihydroxyflavone drug resistance was detected under the treatment of sublethal concentration for 30 passages. Genotypic analysis was conducted to examine penA, 23S rRNA alleles and multilocus sequence typing.
Results:
55 clinical NG isolates emphasised the high-level rates of the current antimicrobial resistance, with a notable prevalence of the penA-60.001 FC428 clone and high-level azithromycin-resistant clones characterised by the 23S rRNA-1 (A2059G) and 23S rRNA-2 (C2611T) alleles. Among the strains that are representative of clinical circulation, 7,8-dihydroxyflavone demonstrated inhibitory activity, with MIC50 and MIC90 values of 10 mg/L and 20 mg/L, respectively, which are unlikely to induce drug resistance in NG.
Conclusions:
7,8-dihydroxyflavone may represent a promising antimicrobial agent in the context of escalating antibiotic resistance.
More Related Videos
07:35Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray
Published on: April 25, 2014
05:06Author Spotlight: Advancing Antibiotic Resistance Research Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System
Published on: January 5, 2024
Related Concept Videos
Treatment Resistant Cancers
Targeted Cancer Therapies
There are several types of targeted therapies against...
Combined Effects of Drugs: Synergism
Such synergistic combinations...
Drug Therapy
Antianxiety Medications
Combination Therapies and Personalized Medicine
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Pulmonary Tuberculosis V
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the...