Responses of Candida albicans to the human antimicrobial peptide LL-37

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• 作者：Pei-Wen Tsai (1)
  Yin-Lien Cheng (1)
  Wen-Ping Hsieh (3)
  Chung-Yu Lan (1) (2)
  
• 关键词：LL ; 37 ; C. albicans ; cell responses
• 刊名：Journal of Microbiology
• 出版年：2014
• 出版时间：July 2014
• 年：2014
• 卷：52
• 期：7
• 页码：581-589
• 全文大小：545 KB
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• 作者单位：Pei-Wen Tsai (1)
  Yin-Lien Cheng (1)
  Wen-Ping Hsieh (3)
  Chung-Yu Lan (1) (2)
  
  1. Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, 30013, Taiwan
  3. Institute of Statistics, National Tsing Hua University, Hsinchu, 30013, Taiwan
  2. Department of Life Science, National Tsing Hua University, Hsinchu, 30013, Taiwan
  
• ISSN：1976-3794

文摘

Candida albicans is amajor fungal pathogen in humans. Antimicrobial peptides (AMPs) are critical components of the innate immune response in vertebrates and represent the first line of defense against microbial infection. LL-37 is the only member of the human family of cathelicidin AMPs and is commonly expressed by various tissues and cells, including surfaces of epithelia. The candidacidal effects of LL-37 have been well documented, but the mechanisms by which LL-37 kills C. albicans are not completely understood. In this study, we examined the effects of LL-37 on cell wall and cellular responses in C. albicans. Using transmission electron microscopy, carbohydrate analyses, and staining for β-1,3-glucan, changing of C. albicans cell wall integrity was detected upon LL-37 treatment. In addition, LL-37 also affected cell wall architecture of the pathogen. Finally, DNA microarray analysis and quantitative PCR demonstrated that sub-lethal concentrations of LL-37 modulated the expression of genes with a variety of functions, including transporters, regulators for biological processes, response to stress or chemical stimulus, and pathogenesis. Together, LL-37 induces complex responses in C. albicans, making LL-37 a promising candidate for use as a therapeutic agent against fungal infections.