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Published on: July 18, 2012
A pilot study on ultrashort peptide with fluconazole: A promising novel anticandidal combination
Rula M Darwish1, Ali H Salama2
1Department of Pharmaceutics and Pharmaceutical Technology, School of Pharmacy, the University of Jordan, Amman 11942, Jordan.
Background And Aim:
Human infections caused by Candida albicans are common and range in severity from relatively treatable skin and mucosal conditions to systemic, fatal invasive candidiasis. The treatment of fungal infections is challenged by major obstacles, including the scarcity of effective therapeutic options, the toxicity of available medications, and the escalating antifungal resistance. Hence, there exists an urgent need to develop new classes of antimicrobial agents. This study was conducted to investigate the effect of KW-23 peptide against standard and resistant strains of C. albicans alone and in combination with fluconazole.
Materials And Methods:
A conjugated ultrashort antimicrobial peptide (KW-23) was designed and synthesized. KW-23 was challenged against standard and multidrug-resistant C. albicans alone and in combination with fluconazole using standard antimicrobial and checkerboard assays. The toxicity of the peptide was examined using hemolytic assays.
Results:
KW-23 positively affected the standard and resistant Candidal strains (at 5 and 15 μg/mL respectively), exhibiting potent synergistic antimicrobial activity against the standard strain when combined with fluconazole. The effect of the combination was additive against the resistant strain (0.6 μg/mL). Furthermore, the peptide exhibited negligible toxicity on human erythrocytes.
Conclusion:
KW-23 and its combination with fluconazole could be a promising candidate for developing anticandidal agents.
Insights
A novel peptide, KW-23, shows potent antimicrobial activity against Candida albicans strains. Combined with fluconazole, it offers a promising, low-toxicity therapeutic option for candidiasis.
Area of Science:
- Microbiology
- Pharmacology
- Biochemistry
Background:
- * *Candida albicans* infections pose significant treatment challenges due to drug resistance and toxicity.
- * Effective antifungal therapies are scarce, necessitating novel antimicrobial agents.
- * Invasive candidiasis can be life-threatening, highlighting the need for new treatments.
Purpose of the Study:
- * To evaluate the efficacy of the KW-23 peptide against *Candida albicans*.
- * To assess the synergistic effect of KW-23 in combination with fluconazole.
- * To determine the toxicity profile of the KW-23 peptide.
Main Methods:
- * Design and synthesis of a conjugated ultrashort antimicrobial peptide (KW-23).
- * Antimicrobial susceptibility testing using standard and checkerboard assays against *C. albicans*.
- * Hemolytic assays to evaluate peptide toxicity on human erythrocytes.
Main Results:
- * KW-23 demonstrated potent activity against standard and resistant *C. albicans* strains.
- * Significant synergistic antimicrobial activity was observed when KW-23 was combined with fluconazole against the standard strain.
- * Additive effects were noted for the combination against resistant strains, with negligible toxicity to human erythrocytes.
Conclusions:
- * KW-23 exhibits promising anticandidal properties.
- * The combination of KW-23 and fluconazole represents a potential therapeutic strategy for candidiasis.
- * Further development of KW-23 could address unmet needs in antifungal treatment.
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