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Updated: Mar 1, 2026
Quantifying the Antifungal Activity of Peptides Against Candida albicans
Published on: January 13, 2023
Transcriptional Responses of Candida albicans to Antimicrobial Peptide MAF-1A
Tao Wang1, Jiangfan Xiu1, Yingchun Zhang1
1School of Basic Medical Sciences, Guizhou Medical UniversityGuiyang, China.
Abstract:
Candida albicans is a major fungal pathogen in humans. Novel antifungal agents are urgent demanded due to the challenges of the resistance. Antimicrobial peptides (AMPs) are critical components of the innate immune system against pathogenic microorganism infection. MAF-1A is a novel cationic AMP that comes from Musca domestica and is effective against C. albicans, but the antifungal mechanism remains unclear. In this study, we performed a transcriptomics analysis in C. albicans using RNA-seq technique under the treatment of MAF-1A. A total of 5654 genes were identified. Among these, 1032 were differentially expressed genes (DEGs), including 575 up-regulated genes and 457 down-regulated genes. In these DEGs, genes encoding ergosterol metabolism and fatty acid biosynthesis were identified to be significantly down-regulated, while genes associated with oxidative stress response and cell wall were identified to be significantly up-regulated. Using pathway enrichment analysis, 12 significant metabolic pathways were identified, and ribosome, oxidative phosphorylation, citrate cycle were mainly involved. The results revealed that MAF-1A induces complex responses in C. albicans. This study provides evidence that MAF-1A may inhibit the growth through affect multi-targets in C. albicans cells.
Insights
The novel antimicrobial peptide MAF-1A effectively targets Candida albicans by disrupting ergosterol metabolism and cell wall integrity. This study reveals MAF-1A’s multi-target antifungal mechanism against this major fungal pathogen.
Area of Science:
- Mycology
- Molecular Biology
- Biochemistry
Background:
- Candida albicans is a significant human fungal pathogen, necessitating new antifungal treatments due to increasing drug resistance.
- Antimicrobial peptides (AMPs) are vital for innate immunity against microbial infections.
- The antifungal mechanism of MAF-1A, a novel cationic AMP from Musca domestica effective against C. albicans, is not fully understood.
Purpose of the Study:
- To elucidate the antifungal mechanism of MAF-1A against Candida albicans.
- To identify the molecular pathways and gene expression changes induced by MAF-1A treatment in C. albicans.
Main Methods:
- Transcriptomics analysis using RNA-sequencing (RNA-seq) was performed on C. albicans treated with MAF-1A.
- Differential gene expression analysis identified up-regulated and down-regulated genes.
- Pathway enrichment analysis was conducted to identify significantly affected metabolic pathways.
Main Results:
- A total of 5654 genes were identified, with 1032 differentially expressed genes (DEGs) including 575 up-regulated and 457 down-regulated.
- Genes involved in ergosterol metabolism and fatty acid biosynthesis were significantly down-regulated.
- Genes related to oxidative stress response and cell wall biosynthesis were significantly up-regulated.
- Pathway analysis highlighted ribosome, oxidative phosphorylation, and the citrate cycle as significantly affected.
Conclusions:
- MAF-1A treatment induces a complex transcriptional response in Candida albicans.
- The antifungal activity of MAF-1A likely involves the disruption of multiple cellular targets, including ergosterol metabolism, cell wall integrity, and energy production pathways.
- These findings provide insights into the multi-target mechanism of MAF-1A, supporting its potential as a novel antifungal agent.
