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Jin X, Hou X, Wang X, Zhang M, Chen J, Song M, Zhang J, Zheng H, Chang W, Lou H. Characterization of an allosteric inhibitor of fungal-specific C-24 sterol methyltransferase to treat Candida albicans infections. Cell Chem Biol 2023; 30:553-568.e7. [PMID: 37160123 DOI: 10.1016/j.chembiol.2023.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 03/02/2023] [Accepted: 04/17/2023] [Indexed: 05/11/2023]
Abstract
Filamentation is an important virulence factor of the pathogenic fungus Candida albicans. The abolition of Candida albicans hyphal formation by disrupting sterol synthesis is an important concept for the development of antifungal drugs with high safety. Here, we conduct a high-throughput screen using a C. albicans strain expressing green fluorescent protein-labeled Dpp3 to identify anti-hypha agents by interfering with ergosterol synthesis. The antipyrine derivative H55 is characterized to have minimal cytotoxicity and potent inhibition of C. albicans hyphal formation in multiple cultural conditions. H55 monotherapy exhibits therapeutic efficacy in mouse models of azole-resistant candidiasis. H55 treatment increases the accumulation of zymosterol, the substrate of C-24 sterol methyltransferase (Erg6). The results of enzyme assays, photoaffinity labeling, molecular simulation, mutagenesis, and cellular thermal shift assays support H55 as an allosteric inhibitor of Erg6. Collectively, H55, an inhibitor of the fungal-specific enzyme Erg6, holds potential to treat C. albicans infections.
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Affiliation(s)
- Xueyang Jin
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Xuben Hou
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Xue Wang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Ming Zhang
- Institute of Medical Science, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Jinyao Chen
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Minghui Song
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Jiaozhen Zhang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Hongbo Zheng
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Wenqiang Chang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China.
| | - Hongxiang Lou
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China.
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Koide T, Tamura M. Effect of diglyceryl dicaprylate on Candida albicans growth and pathogenicity. Biosci Biotechnol Biochem 2021; 85:2334-2342. [PMID: 34508624 DOI: 10.1093/bbb/zbab159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 09/07/2021] [Indexed: 01/06/2023]
Abstract
The antifungal effect of diglyceryl dicaprylate, one of the emulsifiers used as a food additive, on Candida albicans that is a pathogenic fungus that is predominant in the oral cavity was investigated. This component did not affect C. albicans growth; however, it suppressed some virulence factors in a concentration-dependent manner. Furthermore, the suppression of pathogenic factors, such as biofilm formation, adhesion, highly pathogenic dimorphism, and ability to produce proteolytic enzymes, was due to reduction in mRNA expression levels of genes involved in fungal pathogenicities. From these results, this emulsifier could potentially prevent the development of intraoral and extraoral diseases involving C. albicans and could potentially use in oral care and improvement of quality of life.
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Affiliation(s)
- Tomojiro Koide
- Department of Food Ingredients Development, Riken Vitamin Co., Ltd., Mihama-ku Chiba-City, Chiba, Japan
| | - Muneaki Tamura
- Department of Microbiology, Nihon University School of Dentistry, Kanda-surugadai Chiyoda-ku, Tokyo, Japan
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Saito H, Tamura M, Imai K, Ishigami T, Ochiai K. Catechin inhibits Candida albicans dimorphism by disrupting Cek1 phosphorylation and cAMP synthesis. Microb Pathog 2013; 56:16-20. [PMID: 23337884 DOI: 10.1016/j.micpath.2013.01.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 12/06/2012] [Accepted: 01/10/2013] [Indexed: 11/17/2022]
Abstract
Candida albicans is a fungal pathogen that undergoes dimorphism (transformation from a yeast form to a hyphal form), wherein, the yeast form is identified as a disseminating form that plays a critical role in the early stages of Candida disease progression, while the hyphal form is found to exert additional pathogenicity by adapting to various environmental conditions. Here, we elucidated the effects of catechin on C. albicans hyphal formation. Flow cytometry analysis showed catechin inhibited FCS-induced hyphal formation. Moreover, hypha-specific gene expression in MAP kinase cascade and cAMP pathway was decreased ascribable to catechin. Furthermore, through Western blotting and cAMP synthesis analysis, we found catechin obstructs Cek1 phosphorylation in MAP kinase cascade and suppresses cAMP synthesis. These results suggest that catechin possesses anti-dimorphism activity by interfering with in vitro signal transduction. Similarly, this highlights the possible application of catechin in clinical therapy for the management and prevention of candidosis.
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Affiliation(s)
- Hideo Saito
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry, Japan
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Wesolowski J, Hassan RYA, Hodde S, Bardroff C, Bilitewski U. Sensing of oxygen in microtiter plates: a novel tool for screening drugs against pathogenic yeasts. Anal Bioanal Chem 2008; 391:1731-7. [DOI: 10.1007/s00216-008-1947-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2007] [Revised: 01/25/2008] [Accepted: 01/28/2008] [Indexed: 10/22/2022]
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Kadowaki O, Ogasawara A, Watanabe T, Mikami T, Matsumoto T, Misawa Y, Matahira Y, Sakai K. Chitohexose induce the yeast proliferation of Candida albicans. Biol Pharm Bull 2007; 30:583-4. [PMID: 17329861 DOI: 10.1248/bpb.30.583] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Candida albicans generally grows in the hyphae form in RPMI1640 medium. Chitohexose (COS-6) induced the yeast form of C. albicans dose-dependently under this condition. When COS-6 was exposed to C. albicans, yeast proliferation was observed 6 h after starting the incubation. When we observed the growth form of C. albicans cultured with COS-6, yeast proliferation was observed at log-phase. These results showed that COS-6 was useful for the yeast form inducer of C. albicans.
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Affiliation(s)
- Osamu Kadowaki
- Department of Microbiology, Tohoku Pharmaceutical University, 4-4-1, Komatsushima, Aoba-ku, Sendai 981-8558, Japan
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Barodka VM, Acheampong E, Powell G, Lobach L, Logan DA, Parveen Z, Armstead V, Mukhtar M. Antimicrobial effects of liquid anesthetic isoflurane on Candida albicans. J Transl Med 2006; 4:46. [PMID: 17094810 PMCID: PMC1664588 DOI: 10.1186/1479-5876-4-46] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2006] [Accepted: 11/09/2006] [Indexed: 01/12/2023] Open
Abstract
Candida albicans is a dimorphic fungus that can grow in yeast morphology or hyphal form depending on the surrounding environment. This ubiquitous fungus is present in skin and mucus membranes as a potential pathogen that under opportunistic conditions causes a series of systemic and superficial infections known as candidiasis, moniliasis or simply candidiasis. There has been a steady increase in the prevalence of candidiasis that is expressed in more virulent forms of infection. Although candidiasis is commonly manifested as mucocutaneous disease, life-threatening systemic invasion by this fungus can occur in every part of the body. The severity of candidal infections is associated with its morphological shift such that the hyphal morphology of the fungus is most invasive. Of importance, aberrant multiplication of Candida yeast is also associated with the pathogenesis of certain mucosal diseases. In this study, we assessed the anti-candidal activity of the volatile anesthetic isoflurane in liquid form in comparison with the anti-fungal agent amphotericin B in an in vitro culture system. Exposure of C. albicans to isoflurane (0.3% volume/volume and above) inhibited multiplication of yeast as well as formation of hyphae. These data suggest development of potential topical application of isoflurane for controlling a series of cutaneous and genital infections associated with this fungus. Elucidiation of the mechanism by which isoflurane effects fungal growth could offer therapeutic potential for certain systemic fungal infections.
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Affiliation(s)
- Viachaslau M Barodka
- Anesthesiology Program For Translational Research, Department of Anesthesiology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Edward Acheampong
- Division of Infectious Diseases, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Garry Powell
- Anesthesiology Program For Translational Research, Department of Anesthesiology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Ludmila Lobach
- Division of Infectious Diseases, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - David A Logan
- Department of Biological Sciences, Clark Atlanta University, Atlanta, Georgia, USA
| | - Zahida Parveen
- Division of Infectious Diseases, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Valerie Armstead
- Anesthesiology Program For Translational Research, Department of Anesthesiology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Muhammad Mukhtar
- Department of Microbiology and Immunology, Institute for Molecular Medicine and Infectious Disease, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
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