期刊
MICROBIOLOGY SPECTRUM
卷 10, 期 1, 页码 -出版社
AMER SOC MICROBIOLOGY
关键词
antibiofilm; Cutibacterium acnes; 3,3 '-diindolylmethane; indole-3-carbinol; multispecies biofilms
类别
资金
- Basic Science Research Program of the National Research Foundation of Korea (NRF) - Ministry of Education [2021R1I1A3A04037486]
- NRF - Korea government (MSIT) [2021R1A2C1008368]
- X-mind Corps program of NRF - Ministry of Science, ICT [2019H1D8A1105630]
- Priority Research Center Program of the NRF - Ministry of Education [2014R1A6A1031189]
- National Research Foundation of Korea [2021R1I1A3A04037486, 2019H1D8A1105630, 2021R1A2C1008368] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study investigated the antibacterial and antibiofilm activities of 20 indoles against Cutibacterium acnes, a bacterium that inhabits human skin and is implicated in acne vulgaris formation. The results showed that indole-3-carbinol and 3,3'-diindolylmethane significantly inhibited biofilm formation by C. acnes. Furthermore, 3,3'-diindolylmethane successfully inhibited multispecies biofilm formation by C. acnes, Staphylococcus aureus, and Candida albicans. Transcriptional analyses showed that 3,3'-diindolylmethane inhibited the expressions of several biofilm-related genes in C. acnes and inhibited hyphal formation and cell aggregation by C. albicans. These findings suggest that 3,3'-diindolylmethane could be a potential treatment for acne vulgaris and biofilm-associated infections.
The Gram-positive anaerobic bacterium Cutibacterium acnes is a major inhabitant of human skin and has been implicated in acne vulgaris formation and in the formation of multispecies biofilms with other skin-inhabiting organisms like Staphylococcus aureus and Candida albicans. Indoles are widespread in nature (even in human skin) and function as important signaling molecules in diverse prokaryotes and eukaryotes. In the present study, we investigated the antibacterial and antibiofilm activities of 20 indoles against C. acnes. Of the indoles tested, indole-3-carbinol at 0.1 mM significantly inhibited biofilm formation by C. acnes without affecting planktonic cell growth, and the anticancer drug 3,3'-diindolylmethane (DIM) at 0.1 mM (32 mu g/mL) also significantly inhibited planktonic cell growth and biofilm formation by C. acnes, whereas the other indoles and indole itself were less effective. Also, DIM at 0.1 mM successfully inhibited multispecies biofilm formation by C. acnes, S. aureus, and C. albicans. Transcriptional analyses showed that DIM inhibited the expressions of several biofilm-related genes in C. acnes, and at 0.05 mM, DIM inhibited hyphal formation and cell aggregation by C. albicans. These results suggest that DIM and other indoles inhibit biofilm formation by C. acnes and have potential use for treating C. acnes associated diseases. IMPORTANCE Since indoles are widespread in nature (even in human skin), we hypothesized that indole and its derivatives might control biofilm formation of acne-causing bacteria (Cutibacterium acnes and Staphylococcus aureus) and fungal Candida albicans. The present study reports for the first time the antibiofilm and antimicrobial activities of several indoles on C. acnes. Of the indoles tested, two anticancer agents, indole-3-carbinol and 3,3'-diindolylmethane found in cruciferous vegetables, significantly inhibited biofilm formation by C acnes. Furthermore, the most active 3,3'-diindolylmethane successfully inhibited multispecies biofilm formation by C. acnes, S. aureus, and C. albicans. Transcriptional analyses showed that 3,3'-diindolylmethane inhibited the expressions of several biofilm-related genes including lipase, hyaluronate lyase, and virulence-related genes in C. acnes, and 3,3'-diindolylmethane inhibited hyphal formation and cell aggregation by C albicans. Our findings show that 3,3'-diindolylmethane offers a potential means of controlling acne vulgaris and multispecies biofilm-associated infections due to its antibiofilm and antibiotic properties.
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