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Giovannini S, Weibel L, Schittek B, Sinnberg T, Schaller M, Lemberg C, Fehrenbacher B, Biesemeier A, Nordin R, Ivanova I, Kurz B, Svilenska T, Berger C, Bourquin JP, Kulik A, Fassihi H, Lehmann A, Sarkany R, Kobert N, van Toorn M, Marteijn JA, French LE, Rocken M, Vermeulen W, Kamenisch Y, Berneburg M. Skin cancer induction by the antimycotic drug voriconazole is caused by impaired DNA damage detection due to chromatin compaction. J Invest Dermatol 2024:S0022-202X(24)01920-1. [PMID: 39047967 DOI: 10.1016/j.jid.2024.03.050] [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: 06/21/2023] [Revised: 03/16/2024] [Accepted: 03/20/2024] [Indexed: 07/27/2024]
Abstract
Phototoxicity and skin cancer are severe adverse effects of the anti-fungal drug Voriconazole (VOR). These adverse effects resemble those seen in xeroderma pigmentosum (XP), caused by defective DNA nucleotide excision repair (NER), and we show that VOR decreases NER capacity. We show that VOR treatment does not perturb the expression of NER, or other DNA damage-related genes, but that VOR localizes to heterochromatin, in complexes containing histone acetyltransferase GCN5. Impairment of GCN5 binding to histone H3 reduced acetylation of H3, restricting damage-dependent chromatin unfolding, thereby reducing NER initiation. Restoration of H3 histone acetylation using histone deacetylase inhibitors (HDACi), rescued VOR-induced NER repression, thus offering a preventive therapeutic option. These findings underline the importance of DNA damage-dependent chromatin remodeling as an important prerequisite of functional DNA repair.
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Affiliation(s)
- Sara Giovannini
- Department of Dermatology, University Regensburg, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany; Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany
| | - Lisa Weibel
- Department of Pediatric Dermatology and Children's Research Center, University Children's Hospital Zurich, Switzerland
| | - Birgit Schittek
- Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany
| | - Tobias Sinnberg
- Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany; Department of Dermatology, Venereology and Allergology, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Martin Schaller
- Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany
| | - Christina Lemberg
- Section of Immunology, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 266a, Zurich, Switzerland
| | - Birgit Fehrenbacher
- Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany
| | - Antje Biesemeier
- Division of Experimental Vitreoretinal Surgery and Core Facility for Electron Microscopy, Center for Ophthalmology, Schleichstr. 12/1, 72076 Tuebingen, Germany; Luxembourg Institute of Science and Technology (LIST), MRT - Materials Research and Technology Department, 41, rue du Brill, L-4422 Belvaux, Luxembourg
| | - Renate Nordin
- Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany
| | - Irina Ivanova
- Department of Dermatology, University Regensburg, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany
| | - Bernadett Kurz
- Department of Dermatology, University Regensburg, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany
| | - Teodora Svilenska
- Department of Dermatology, University Regensburg, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany
| | - Christoph Berger
- Division of Infectious Diseases and Children's Research Center, University Children's Hospital Zurich, Switzerland
| | - Jean-Pierre Bourquin
- Department of Pediatric Oncology and Children's Research Center, University Children's Hospital Zurich, Switzerland
| | - Andreas Kulik
- Interfaculty Institute of Microbiology and Infection Medicine, Eberhard Karls University, Auf der Morgenstelle 28, 72076 Tuebingen, Germany
| | - Hiva Fassihi
- Guy's and St Thomas' NHS Trust, Guy's Hospital Great Maze Pond London SE1 9RT, UK
| | - Alan Lehmann
- Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, UK
| | - Robert Sarkany
- Guy's and St Thomas' NHS Trust, Guy's Hospital Great Maze Pond London SE1 9RT, UK
| | - Nikita Kobert
- ICB Institute for Chemical and Bioengineering, ETH Zurich, Switzerland
| | - Marvin van Toorn
- Department of Molecular Genetics, Oncode Institute, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Jurgen A Marteijn
- Department of Molecular Genetics, Oncode Institute, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Lars E French
- Department of Dermatology and Allergy, University Hospital, Ludwig Maximilan University Munich, Munich, Germany; Dr. Philip Frost, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Martin Rocken
- Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany
| | - Wim Vermeulen
- Department of Molecular Genetics, Oncode Institute, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - York Kamenisch
- Department of Dermatology, University Regensburg, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany; Department of Dermatology, Eberhard Karls University, Liebermeisterstrasse 25, 72076 Tuebingen, Germany
| | - Mark Berneburg
- Department of Dermatology, University Regensburg, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany.
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Lu G, Ju X, Zhu M, Ou J, Xu D, Li K, Jiang W, Wan C, Tian Y, Niu Z. Histatin 5-Inspired Short-Chain Peptides Selectively Combating Pathogenic Fungi with Multifaceted Mechanisms. Adv Healthc Mater 2024; 13:e2303755. [PMID: 38424475 DOI: 10.1002/adhm.202303755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 02/28/2024] [Indexed: 03/02/2024]
Abstract
Short-chain antifungal peptides (AFPs) inspired by histatin 5 have been designed to address the problem of antifungal drug resistance. These AFPs demonstrate remarkable antifungal activity, with a minimal inhibitory concentration as low as 2 µg mL-1. Notably, these AFPs display a strong preference for targeting fungi rather than bacteria and mammalian cells. This is achieved by binding the histidine-rich domains of the AFPs to the Ssa1/2 proteins in the fungal cell wall, as well as the reduced membrane-disrupting activity due to their low amphiphilicity. These peptides disrupt the nucleus and mitochondria once inside the cells, leading to reactive oxygen species production and cell damage. In a mouse model of vulvovaginal candidiasis, the AFPs demonstrate not only antifungal activity, but also promote the growth of beneficial Lactobacillus spp. This research provides valuable insights for the development of fungus-specific AFPs and offers a promising strategy for the treatment of fungal infectious diseases.
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Affiliation(s)
- Guojun Lu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiaoyan Ju
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
| | - Meng Zhu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
| | - Jinzhao Ou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Dandan Xu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Kejia Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Wei Jiang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chenxiao Wan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ye Tian
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
| | - Zhongwei Niu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Chai Z, Li Y, Zhang J, Ding C, Tong X, Zhang Z. Sirtulin-Ypk1 regulation axis governs the TOR signaling pathway and fungal pathogenicity in Cryptococcus neoformans. Microbiol Spectr 2024:e0003824. [PMID: 38912819 DOI: 10.1128/spectrum.00038-24] [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: 01/07/2024] [Accepted: 05/06/2024] [Indexed: 06/25/2024] Open
Abstract
Cryptococcus neoformans is a life-threatening fungal pathogen that is a causative agent for pulmonary infection and meningoencephalitis in both immunocompetent and immunodeficient individuals. Recent studies have elucidated the important function of the target of rapamycin (TOR) signaling pathway in the modulation of C. neoformans virulence factor production and pathogenicity in animal infection models. Herein, we discovered that Ypk1, a critical component of the TOR signaling pathway, acts as a critical modulator in fungal pathogenicity through post-translational modifications (PTMs). Mass spectrometry analysis revealed that Ypk1 is subject to protein acetylation at lysines 315 and 502, and both sites are located within kinase functional domains. Inhibition of the C. neoformans TOR pathway by rapamycin activates the deacetylation process for Ypk1. The YPK1Q strain, a hyper-acetylation of Ypk1, exhibited increased sensitivity to rapamycin, decreased capsule formation ability, reduced starvation tolerance, and diminished fungal pathogenicity, indicating that deacetylation of Ypk1 is crucial for responding to stress. Deacetylase inhibition assays have shown that sirtuin family proteins are critical to the Ypk1 deacetylation mechanism. After screening deacetylase mutants, we found that Dac1 and Dac7 directly interact with Ypk1 to facilitate the deacetylation modification process via a protein-protein interaction. These findings provide new insights into the molecular basis for regulating the TORC-Ypk1 axis and demonstrate an important function of protein acetylation in modulating fungal pathogenicity. IMPORTANCE Cryptococcus neoformans is an important opportunistic fungal pathogen in humans. While there are currently few effective antifungal treatments, the absence of novel molecular targets in fungal pathogenicity hinders the development of new drugs. There is increasing evidence that protein post-translational modifications (PTMs) can modulate the pathogenicity of fungi. In this study, we discovered that the pathogenicity of C. neoformans was significantly impacted by the dynamic acetylation changes of Ypk1, the immediate downstream target of the TOR complex. We discovered that Ypk1 is acetylated at lysines 315 and 502, both of which are within kinase functional domains. Deacetylation of Ypk1 is necessary for formation of the capsule structure, the response to the TOR pathway inhibitor rapamycin, nutrient utilization, and host infection. We also demonstrate that the sirtuin protein family is involved in the Ypk1 deacetylation mechanism. We anticipate that the sirtuin-Ypk1 regulation axis could be used as a potential target for the development of antifungal medications.
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Affiliation(s)
- Zhenghua Chai
- Department of Laboratory Medicine of Shengjing Hospital of China Medical University, Shenyang, China
| | - Yanjian Li
- College of Sciences, Northeastern University, Shenyang, China
| | - Jing Zhang
- College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Chen Ding
- College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Xiujuan Tong
- Department of Laboratory Medicine of Central Hospital of Chaoyang, Chaoyang, China
| | - Zhijie Zhang
- Department of Laboratory Medicine of Shengjing Hospital of China Medical University, Shenyang, China
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Conte M, Eletto D, Pannetta M, Esposito R, Monti MC, Morretta E, Tessarz P, Morello S, Tosco A, Porta A. H3K56 acetylation affects Candida albicans morphology and secreted soluble factors interacting with the host. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2024; 1867:195048. [PMID: 38885737 DOI: 10.1016/j.bbagrm.2024.195048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/17/2024] [Accepted: 06/10/2024] [Indexed: 06/20/2024]
Abstract
In recent years, epigenetics has been revealed as a mechanism able to modulate the expression of virulence traits in diverse pathogens, including Candida albicans. Indeed, epigenetic regulation can sense environmental changes, leading to the rapid and reversible modulation of gene expression with consequent adaptation to novel environments. How epigenetic changes can impact expression and signalling output, including events associated with mechanisms of morphological transition and virulence, is still poorly studied. Here, using nicotinamide as a sirtuin inhibitor, we explored how the accumulation of the H3K56 acetylation, the most prominent histone acetylation in C. albicans, might affect its interaction with the host. Our experiments demonstrate that H3K56 acetylation profoundly affects the production and/or secretion of soluble factors compromising actin remodelling and cytokine production. ChIP- and RNA-seq analyses highlighted a direct impact of H3K56 acetylation on genes related to phenotypic switching, biofilm formation and cell aggregation. Direct and indirect regulation also involves genes related to cell wall protein biosynthesis, β-glucan and mannan exposure, and hydrolytic secreted enzymes, supporting the hypothesis that the fluctuations of H3K56 acetylation in C. albicans might impair the macrophage response to the yeast and thus promote the host-immune escaping.
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Affiliation(s)
- Marisa Conte
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy; Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano (SA), Italy
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Martina Pannetta
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy; Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano (SA), Italy
| | - Roberta Esposito
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Maria Chiara Monti
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy; Department of Pharmacy, University of Naples "Federico II", Italy
| | - Elva Morretta
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Peter Tessarz
- Max Planck Research Group "Chromatin and Ageing", Max Planck Institute for Biology of Ageing, University of Cologne, Germany; Cologne Excellence Cluster on Stress Responses in ageing-associated Diseases (CECAD), University of Cologne, Germany; Dept. Of Human Biology, Radboud Institute for Molecular Life Sciences, Faculty of Science, Radboud University, Nijmegen, the Netherlands
| | - Silvana Morello
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy.
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy.
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Wang Y, Fan J, Zhou Z, Goldman GH, Lu L, Zhang Y. Histone acetyltransferase Sas3 contributes to fungal development, cell wall integrity, and virulence in Aspergillus fumigatus. Appl Environ Microbiol 2024; 90:e0188523. [PMID: 38451077 PMCID: PMC11022558 DOI: 10.1128/aem.01885-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 02/15/2024] [Indexed: 03/08/2024] Open
Abstract
Histone acetyltransferase (HAT)-mediated epigenetic modification is essential for diverse cellular processes in eukaryotes. However, the functions of HATs in the human pathogen Aspergillus fumigatus remain poorly understood. In this study, we characterized the functions of MOZ, Ybf2/Sas3, Sas2, and Tip60 (MYST)-family histone acetyltransferase something about silencing (Sas3) in A. fumigatus. Phenotypic analysis revealed that loss of Sas3 results in significant impairments in colony growth, conidiation, and virulence in the Galleria mellonella model. Subcellular localization and Western blot analysis demonstrated that Sas3 localizes to nuclei and is capable of acetylating lysine 9 and 14 of histone H3 in vivo. Importantly, we found that Sas3 is critical for the cell wall integrity (CWI) pathway in A. fumigatus as evidenced by hypersensitivity to cell wall-perturbing agents, altered cell wall thickness, and abnormal phosphorylation levels of CWI protein kinase MpkA. Furthermore, site-directed mutagenesis studies revealed that the conserved glycine residues G641 and G643 and glutamate residue E664 are crucial for the acetylation activity of Sas3. Unexpectedly, only triple mutations of Sas3 (G641A/G643A/E664A) displayed defective phenotypes similar to the Δsas3 mutant, while double or single mutations did not. This result implies that the role of Sas3 may extend beyond histone acetylation. Collectively, our findings demonstrate that MYST-family HAT Sas3 plays an important role in the fungal development, virulence, and cell wall integrity in A. fumigatus. IMPORTANCE Epigenetic modification governed by HATs is indispensable for various cellular processes in eukaryotes. Nonetheless, the precise functions of HATs in the human pathogen Aspergillus fumigatus remain elusive. In this study, we unveil the roles of MYST-family HAT Sas3 in colony growth, conidiation, virulence, and cell wall stress response in A. fumigatus. Particularly, our findings demonstrate that Sas3 can function through mechanisms unrelated to histone acetylation, as evidenced by site-directed mutagenesis experiments. Overall, this study broadens our understanding of the regulatory mechanism of HATs in fungal pathogens.
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Affiliation(s)
- Yamei Wang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Jialu Fan
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Zhengyu Zhou
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Gustavo H. Goldman
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Ling Lu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Yuanwei Zhang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
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Cai Q, Tian L, Xie JT, Jiang DH. Two sirtuin proteins, Hst3 and Hst4, modulate asexual development, stress tolerance, and virulence by affecting global gene expression in Beauveria bassiana. Microbiol Spectr 2024; 12:e0313723. [PMID: 38193686 PMCID: PMC10846017 DOI: 10.1128/spectrum.03137-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 12/01/2023] [Indexed: 01/10/2024] Open
Abstract
Beauveria bassiana is a widely used entomopathogenic fungus in insect biological control applications. In this study, we investigated the role of two sirtuin homologs, BbHst3 and BbHst4, in the biological activities and pathogenicity of B. bassiana. Our results showed that deletion of BbHst3 and/or BbHst4 led to impaired sporulation, reduced (~50%) conidial production, and decreased tolerance to various stresses, including osmotic, oxidative, and cell wall-disturbing agents. Moreover, BbHst4 plays dominant roles in histone H3-K56 acetylation and DNA damage response, while BbHst3 is more responsible for maintaining cell wall integrity. Transcriptomic analyses revealed significant changes (>1,500 differentially expressed genes) in gene expression patterns in the mutant strains, particularly in genes related to secondary metabolism, detoxification, and transporters. Furthermore, the ΔBbHst3, ΔBbHst4, and ΔBbHst3ΔBbHst4 strains exhibited reduced virulence in insect bioassays, with decreased (~20%) abilities to kill insect hosts through topical application and intra-hemocoel injection. These findings highlight the crucial role of BbHst3 and BbHst4 in sporulation, DNA damage repair, cell wall integrity, and fungal infection in B. bassiana. Our study provides new insights into the regulatory mechanisms underlying the biological activities and pathogenicity of B. bassiana and emphasizes the potential of targeting sirtuins for improving the efficacy of fungal biocontrol agents.IMPORTANCESirtuins, as a class of histone deacetylases, have been shown to play important roles in various cellular processes in fungi, including asexual development, stress response, and pathogenicity. By investigating the functions of BbHst3 and BbHst4, we have uncovered their critical contributions to important phenotypes in Beauveria bassiana. Deletion of these sirtuin homologs led to reduced conidial yield, increased sensitivity to osmotic and oxidative stresses, impaired DNA damage repair processes, and decreased fungal virulence. Transcriptomic analyses showed differential expression of numerous genes involved in secondary metabolism, detoxification, transporters, and virulence-related factors, potentially uncovering new targets for manipulation and optimization of fungal biocontrol agents. Our study also emphasizes the significance of sirtuins as key regulators in fungal biology and highlights their potential as promising targets for the development of novel antifungal strategies.
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Affiliation(s)
- Qing Cai
- College of Plant Science and Technology, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Li Tian
- Department of Bioengineering, Shandong Provincial Key Laboratory of Microbial Engineering, Qilu University of Technology, Jinan, Shandong, China
| | - Jia-Tao Xie
- College of Plant Science and Technology, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Dao-Hong Jiang
- College of Plant Science and Technology, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China
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7
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Vanzolini T, Magnani M. Old and new strategies in therapy and diagnosis against fungal infections. Appl Microbiol Biotechnol 2024; 108:147. [PMID: 38240822 PMCID: PMC10799149 DOI: 10.1007/s00253-023-12884-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 12/05/2023] [Accepted: 12/05/2023] [Indexed: 01/22/2024]
Abstract
Fungal infections represent a serious global health threat. The new emerging pathogens and the spread of different forms of resistance are now hardly challenging the tools available in therapy and diagnostics. With the commonly used diagnoses, fungal identification is often slow and inaccurate, and, on the other hand, some drugs currently used as treatments are significantly affected by the decrease in susceptibility. Herein, the antifungal arsenal is critically summarized. Besides describing the old approaches and their mechanisms, advantages, and limitations, the focus is dedicated to innovative strategies which are designed, identified, and developed to take advantage of the discrepancies between fungal and host cells. Relevant pathways and their role in survival and virulence are discussed as their suitability as sources of antifungal targets. In a similar way, molecules with antifungal activity are reported as potential agents/precursors of the next generation of antimycotics. Particular attention was devoted to biotechnological entities, to their novelty and reliability, to drug repurposing and restoration, and to combinatorial applications yielding significant improvements in efficacy. KEY POINTS: • New antifungal agents and targets are needed to limit fungal morbidity and mortality. • Therapeutics and diagnostics suffer of delays in innovation and lack of targets. • Biologics, drug repurposing and combinations are the future of antifungal treatments.
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Affiliation(s)
- Tania Vanzolini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61029, Urbino, PU, Italy.
| | - Mauro Magnani
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61029, Urbino, PU, Italy
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8
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Littlejohn PT, Metcalfe-Roach A, Cardenas Poire E, Holani R, Bar-Yoseph H, Fan YM, Woodward SE, Finlay BB. Multiple micronutrient deficiencies in early life cause multi-kingdom alterations in the gut microbiome and intrinsic antibiotic resistance genes in mice. Nat Microbiol 2023; 8:2392-2405. [PMID: 37973864 DOI: 10.1038/s41564-023-01519-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/10/2023] [Indexed: 11/19/2023]
Abstract
Globally, ~340 million children suffer from multiple micronutrient deficiencies, accompanied by high pathogenic burden and death due to multidrug-resistant bacteria. The microbiome is a reservoir of antimicrobial resistance (AMR), but the implications of undernutrition on the resistome is unclear. Here we used a postnatal mouse model that is deficient in multiple micronutrients (that is, zinc, folate, iron, vitamin A and vitamin B12 deficient) and shotgun metagenomic sequencing of faecal samples to characterize gut microbiome structure and functional potential, and the resistome. Enterobacteriaceae were enriched in micronutrient-deficient mice compared with mice fed an isocaloric experimental control diet. The mycobiome and virome were also altered with multiple micronutrient deficiencies including increased fungal pathogens such as Candida dubliniensis and bacteriophages. Despite being antibiotic naïve, micronutrient deficiency was associated with increased enrichment of genes and gene networks encoded by pathogenic bacteria that are directly or indirectly associated with intrinsic antibiotic resistance. Bacterial oxidative stress was associated with intrinsic antibiotic resistance in these mice. This analysis reveals multi-kingdom alterations in the gut microbiome as a result of co-occurring multiple micronutrient deficiencies and the implications for antibiotic resistance.
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Affiliation(s)
- Paula T Littlejohn
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada.
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada.
| | - Avril Metcalfe-Roach
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Ravi Holani
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
| | - Haggai Bar-Yoseph
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
| | - Yiyun M Fan
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sarah E Woodward
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
| | - B Brett Finlay
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada.
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada.
- Biochemistry and Molecular Biology Department, University of British Columbia, Vancouver, British Columbia, Canada.
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9
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Sharma C, Kadosh D. Post-transcriptional control of antifungal resistance in human fungal pathogens. Crit Rev Microbiol 2023; 49:469-484. [PMID: 35634915 PMCID: PMC9766424 DOI: 10.1080/1040841x.2022.2080527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 05/10/2022] [Accepted: 05/17/2022] [Indexed: 11/03/2022]
Abstract
Global estimates suggest that over 300 million individuals of all ages are affected by serious fungal infections every year, culminating in about 1.7 million deaths. The societal and economic burden on the public health sector due to opportunistic fungal pathogens is quite significant, especially among immunocompromised patients. Despite the high clinical significance of these infectious agents, treatment options are limited with only three major classes of antifungal drugs approved for use. Clinical management of fungal diseases is further compromised by the emergence of antifungal resistant strains. Transcriptional and genetic mechanisms that control drug resistance in human fungal pathogens are well-studied and include drug target alteration, upregulation of drug efflux pumps as well as changes in drug affinity and abundance of target proteins. In this review, we highlight several recently discovered novel post-transcriptional mechanisms that control antifungal resistance, which involve regulation at the translational, post-translational, epigenetic, and mRNA stability levels. The discovery of many of these novel mechanisms has opened new avenues for the development of more effective antifungal treatment strategies and new insights, perspectives, and future directions that will facilitate this process are discussed.
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Affiliation(s)
- Cheshta Sharma
- Department of Microbiology, Immunology and Molecular Genetics University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - David Kadosh
- Department of Microbiology, Immunology and Molecular Genetics University of Texas Health Science Center at San Antonio, San Antonio, TX
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10
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Prasad P, Tippana M. Morphogenic plasticity: the pathogenic attribute of Candida albicans. Curr Genet 2023; 69:77-89. [PMID: 36947241 DOI: 10.1007/s00294-023-01263-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 02/10/2023] [Accepted: 02/20/2023] [Indexed: 03/23/2023]
Abstract
Candida albicans is a commensal organism of the human gastrointestinal tract and a prevalent opportunistic pathogen. It exhibits different morphogenic forms to survive in different host niches with distinct environmental conditions (pH, temperature, oxidative stress, nutrients, serum, chemicals, radiation, etc.) and genetic factors (transcription factors and genes). The different morphogenic forms of C. albicans are yeast, hyphal, pseudohyphal, white, opaque, and transient gray cells, planktonic and biofilm forms of cells. These forms differ in the parameters like cellular phenotype, colony morphology, adhesion to solid surfaces, gene expression profile, and the virulent traits. Each form is functionally distinct and responds discretely to the host immune system and antifungal drugs. Hence, morphogenic plasticity is the key to virulence. In this review, we address the characteristics, the pathogenic potential of the different morphogenic forms and the conditions required for morphogenic transitions.
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Affiliation(s)
- Priya Prasad
- Department of Biotechnology, National Institute of Technology Warangal, Warangal, Telangana, India.
| | - Meena Tippana
- Department of Biotechnology, National Institute of Technology Warangal, Warangal, Telangana, India
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11
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Singha R, Aggarwal R, Sanyal K. Negative regulation of biofilm development by the CUG-Ser1 clade-specific histone H3 variant is dependent on the canonical histone chaperone CAF-1 complex in Candida albicans. Mol Microbiol 2023; 119:574-585. [PMID: 36855815 DOI: 10.1111/mmi.15050] [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: 06/25/2022] [Revised: 02/21/2023] [Accepted: 02/26/2023] [Indexed: 03/02/2023]
Abstract
The CUG-Ser1 clade-specific histone H3 variant (H3VCTG ) has been reported to be a negative regulator of planktonic to biofilm growth transition in Candida albicans. The preferential binding of H3VCTG at the biofilm gene promoters makes chromatin repressive for the biofilm mode of growth. The two evolutionarily conserved chaperone complexes involved in incorporating histone H3 are CAF-1 and HIRA. In this study, we sought to identify the chaperone complex(es) involved in loading H3VCTG . We demonstrate that C. albicans cells lacking either Cac1 or Cac2 subunit of the CAF-1 chaperone complex, exhibit a hyper-filamentation phenotype on solid surfaces and form more robust biofilms than wild-type cells, thereby mimicking the phenotype of the H3VCTG null mutant. None of the subunits of the HIRA chaperone complex shows any significant difference in biofilm growth as compared to the wild type. The occupancy of H3VCTG is found to be significantly reduced at the promoters of biofilm genes in the absence of CAF-1 subunits. Hence, we provide evidence that CAF-1, a chaperone known to load canonical histone H3 in mammalian cells, is involved in chaperoning of variant histone H3VCTG at the biofilm gene promoters in C. albicans. Our findings also illustrate the acquisition of an unconventional role of the CAF-1 chaperone complex in morphogenesis in C. albicans.
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Affiliation(s)
- Rima Singha
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India
| | - Rashi Aggarwal
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India
| | - Kaustuv Sanyal
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India
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12
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Navarrete B, Ibeas JI, Barrales RR. Systematic characterization of Ustilago maydis sirtuins shows Sir2 as a modulator of pathogenic gene expression. Front Microbiol 2023; 14:1157990. [PMID: 37113216 PMCID: PMC10126416 DOI: 10.3389/fmicb.2023.1157990] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/13/2023] [Indexed: 04/29/2023] Open
Abstract
Phytopathogenic fungi must adapt to the different environmental conditions found during infection and avoid the immune response of the plant. For these adaptations, fungi must tightly control gene expression, allowing sequential changes in transcriptional programs. In addition to transcription factors, chromatin modification is used by eukaryotic cells as a different layer of transcriptional control. Specifically, the acetylation of histones is one of the chromatin modifications with a strong impact on gene expression. Hyperacetylated regions usually correlate with high transcription and hypoacetylated areas with low transcription. Thus, histone deacetylases (HDACs) commonly act as repressors of transcription. One member of the family of HDACs is represented by sirtuins, which are deacetylases dependent on NAD+, and, thus, their activity is considered to be related to the physiological stage of the cells. This property makes sirtuins good regulators during environmental changes. However, only a few examples exist, and with differences in the extent of the implication of the role of sirtuins during fungal phytopathogenesis. In this work, we have performed a systematic study of sirtuins in the maize pathogen Ustilago maydis, finding Sir2 to be involved in the dimorphic switch from yeast cell to filament and pathogenic development. Specifically, the deletion of sir2 promotes filamentation, whereas its overexpression highly reduces tumor formation in the plant. Moreover, transcriptomic analysis revealed that Sir2 represses genes that are expressed during biotrophism development. Interestingly, our results suggest that this repressive effect is not through histone deacetylation, indicating a different target of Sir2 in this fungus.
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13
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Yan Y, Liao Z, Shen J, Zhu Z, Cao Y. Nicotinamide potentiates amphotericin B activity against Candida albicans. Virulence 2022; 13:1533-1542. [PMID: 36068709 PMCID: PMC9467617 DOI: 10.1080/21505594.2022.2119656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Amphotericin B (AmB) is a widely used antifungal agent especially for the therapy of systemic fungal infections. However, the severe side effects of AmB often leads to the premature termination of the treatment. So it is imperative to find the drugs that can both reduce the dosage and enhance the antifungal efficacy of AmB. Here we demonstrated that Nicotinamide (NAM), a cheap and safe vitamin, could enhance the antifungal activities of AmB. We demonstrated the synergistic interaction of NAM and AmB against Candida albicans as well as other Candida spp. and Cryptococcus neoformans. Moreover, NAM could enhance of the activity of AmB against biofilm. This enhancement was also observed in disseminated candidiasis in vivo. Our further study revealed that AmB could induce oxidative damage through the modification of histone acetylation. AmB could inhibit the expression of HST3, an H3K56 deacetylase in C. albicans. The immunoblotting test revealed excessive H3K56ac in AmB-treated fungal cells. Consistantly, the hst3Δ mutant displayed high sensitivity to AmB, while addition of NAM, an H3K56 deacetylation inhibitor, resulted in an even severe inhibition in the growth of this strain. These results indicated that AmB could execute antifungal activity via boosting H3K56ac which was mediated by HST3, and the mechanism for the synergistic interaction of NAM and AmB was based on exacerbating this process, which led to even excessive H3K56ac and oxidative damage. This finding provided theoretical basis for better understanding the antifungal mechanisms of AmB and clinical application of this drug.
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Affiliation(s)
- Yu Yan
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China.,Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, China
| | - ZeBin Liao
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Juan Shen
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China.,Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - ZhenYu Zhu
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - YingYing Cao
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China.,Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, China
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14
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Punia A, Choudhary P, Sharma N, Dahiya S, Gulia P, Chhillar AK. Therapeutic Approaches for Combating Aspergillus Associated Infection. Curr Drug Targets 2022; 23:1465-1488. [PMID: 35748549 DOI: 10.2174/1389450123666220623164548] [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: 09/28/2021] [Revised: 02/12/2022] [Accepted: 02/16/2022] [Indexed: 01/25/2023]
Abstract
Now-a-days fungal infection emerges as a significant problem to healthcare management systems due to high frequency of associated morbidity, mortality toxicity, drug-drug interactions, and resistance of the antifungal agents. Aspergillus is the most common mold that cause infection in immunocompromised hosts. It's a hyaline mold that is cosmopolitan and ubiquitous in nature. Aspergillus infects around 10 million population each year with a mortality rate of 30-90%. Clinically available antifungal formulations are restricted to four classes (i.e., polyene, triazole, echinocandin, and allylamine), and each of them have their own limitations associated with the activity spectrum, the emergence of resistance, and toxicity. Consequently, novel antifungal agents with modified and altered chemical structures are required to combat these invasive fungal infections. To overcome these limitations, there is an urgent need for new antifungal agents that can act as potent drugs in near future. Currently, some compounds have shown effective antifungal activity. In this review article, we have discussed all potential antifungal therapies that contain old antifungal drugs, combination therapies, and recent novel antifungal formulations, with a focus on the Aspergillus associated infections.
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Affiliation(s)
- Aruna Punia
- Department of Biotechnology, Maharishi Dayanand University, Rohtak, Haryana 124001, India
| | - Pooja Choudhary
- Department of Biotechnology, Maharishi Dayanand University, Rohtak, Haryana 124001, India
| | - Namita Sharma
- Department of Biotechnology, Maharishi Dayanand University, Rohtak, Haryana 124001, India
| | - Sweety Dahiya
- Department of Biotechnology, Maharishi Dayanand University, Rohtak, Haryana 124001, India
| | - Prity Gulia
- Department of Biotechnology, Maharishi Dayanand University, Rohtak, Haryana 124001, India
| | - Anil K Chhillar
- Department of Biotechnology, Maharishi Dayanand University, Rohtak, Haryana 124001, India
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15
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Conte M, Eletto D, Pannetta M, Petrone AM, Monti MC, Cassiano C, Giurato G, Rizzo F, Tessarz P, Petrella A, Tosco A, Porta A. Effects of Hst3p inhibition in Candida albicans: a genome-wide H3K56 acetylation analysis. Front Cell Infect Microbiol 2022; 12:1031814. [PMID: 36389164 PMCID: PMC9647175 DOI: 10.3389/fcimb.2022.1031814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/10/2022] [Indexed: 11/30/2022] Open
Abstract
Candida spp. represent the third most frequent worldwide cause of infection in Intensive Care Units with a mortality rate of almost 40%. The classes of antifungals currently available include azoles, polyenes, echinocandins, pyrimidine derivatives, and allylamines. However, the therapeutical options for the treatment of candidiasis are drastically reduced by the increasing antifungal resistance. The growing need for a more targeted antifungal therapy is limited by the concern of finding molecules that specifically recognize the microbial cell without damaging the host. Epigenetic writers and erasers have emerged as promising targets in different contexts, including the treatment of fungal infections. In C. albicans, Hst3p, a sirtuin that deacetylates H3K56ac, represents an attractive antifungal target as it is essential for the fungus viability and virulence. Although the relevance of such epigenetic regulator is documented for the development of new antifungal therapies, the molecular mechanism behind Hst3p-mediated epigenetic regulation remains unrevealed. Here, we provide the first genome-wide profiling of H3K56ac in C. albicans resulting in H3K56ac enriched regions associated with Candida sp. pathogenicity. Upon Hst3p inhibition, 447 regions gain H3K56ac. Importantly, these genomic areas contain genes encoding for adhesin proteins, degradative enzymes, and white-opaque switching. Moreover, our RNA-seq analysis revealed 1330 upregulated and 1081 downregulated transcripts upon Hst3p inhibition, and among them, we identified 87 genes whose transcriptional increase well correlates with the enrichment of H3K56 acetylation on their promoters, including some well-known regulators of phenotypic switching and virulence. Based on our evidence, Hst3p is an appealing target for the development of new potential antifungal drugs.
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Affiliation(s)
- Marisa Conte
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - Martina Pannetta
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - Anna M. Petrone
- Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - Maria C. Monti
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - Chiara Cassiano
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- Department of Pharmacy, University of Naples ‘Federico II’, Naples, Italy
| | - Giorgio Giurato
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, Salerno, Italy
| | - Francesca Rizzo
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, Salerno, Italy
| | - Peter Tessarz
- Max Planck Research Group “Chromatin and Ageing”, Max Planck Institute for Biology of Ageing, Cologne, Germany
- Cologne Excellence Cluster on Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | | | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- *Correspondence: Amalia Porta, ; Alessandra Tosco,
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- *Correspondence: Amalia Porta, ; Alessandra Tosco,
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16
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Zhao S, Hong Y, Liang YY, Li XL, Shen JC, Sun CC, Chu LL, Hu J, Wang H, Xu DX, Zhang SC, Xu DD, Xu T, Zhao LL. Compartmentalized regulation of NAD + by Di (2-ethyl-hexyl) phthalate induces DNA damage in placental trophoblast. Redox Biol 2022; 55:102414. [PMID: 35926314 PMCID: PMC9356100 DOI: 10.1016/j.redox.2022.102414] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/16/2022] [Accepted: 07/16/2022] [Indexed: 11/29/2022] Open
Abstract
Di (2-ethyl-hexyl) phthalate (DEHP) is a wildly used plasticizer. Maternal exposure to DEHP during pregnancy blocks the placental cell cycle at the G2/M phase by reducing the efficiency of the DNA repair pathways and affects the health of offsprings. However, the mechanism by which DEHP inhibits the repair of DNA damage remains unclear. In this study, we demonstrated that DEHP inhibits DNA damage repair by reducing the activity of the DNA repair factor recruitment molecule PARP1. NAD+ and ATP are two substrates necessary for PARP1 activity. DEHP abated NAD+ in the nucleus by reducing the level of NAD+ synthase NMNAT1 and elevated NAD+ in the mitochondrial by promoting synthesis. Furthermore, DEHP destroyed the mitochondrial respiratory chain, affected the structure and quantity of mitochondria, and decreased ATP production. Therefore, DEHP inhibits PARP1 activity by reducing the amount of NAD+ and ATP, which hinders the DNA damage repair pathways. The supplement of NAD+ precursor NAM can partially rescue the DNA and mitochondria damage. It provides a new idea for the prevention of health problems of offsprings caused by DEHP injury to the placenta.
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Affiliation(s)
- Shuai Zhao
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China; School of Biology, Food and Environment, Hefei University, Hefei, 230601, China
| | - Yun Hong
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China; School of Biology, Food and Environment, Hefei University, Hefei, 230601, China
| | - Yue-Yue Liang
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China; School of Biology, Food and Environment, Hefei University, Hefei, 230601, China
| | - Xiao-Lu Li
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China; School of Biology, Food and Environment, Hefei University, Hefei, 230601, China
| | - Jiang-Chuan Shen
- Department of Molecular and Cellular Biochemistry, Indiana University, Bloomington, IN, 47405, USA
| | - Cong-Cong Sun
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China; Key Laboratory of the Public Health Safety, Ministry of Education, Department of Environmental Health, School of Public Health / Center for Water and Health, School of Public Health, Fudan University, Shanghai, 200032, China
| | - Ling-Luo Chu
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Jie Hu
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - Hua Wang
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - De-Xiang Xu
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - Shi-Chen Zhang
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China; School of Public Health and Health Management, Anhui Medical College, No 632 Furong Road, Hefei, Anhui, 230601, China
| | - Dou-Dou Xu
- Department of Pediatrics, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, China
| | - Tao Xu
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China; School of Biology, Food and Environment, Hefei University, Hefei, 230601, China.
| | - Ling-Li Zhao
- Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Department of Toxicology, Anhui Provincial Key Laboratory of Population Health and Aristogenics, MOE Key Laboratory of Population Health Across Life Cycle, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China.
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17
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Epigenetic Regulation of Antifungal Drug Resistance. J Fungi (Basel) 2022; 8:jof8080875. [PMID: 36012862 PMCID: PMC9409733 DOI: 10.3390/jof8080875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/02/2022] [Accepted: 08/04/2022] [Indexed: 11/23/2022] Open
Abstract
In medical mycology, epigenetic mechanisms are emerging as key regulators of multiple aspects of fungal biology ranging from development, phenotypic and morphological plasticity to antifungal drug resistance. Emerging resistance to the limited therapeutic options for the treatment of invasive fungal infections is a growing concern. Human fungal pathogens develop drug resistance via multiple mechanisms, with recent studies highlighting the role of epigenetic changes involving the acetylation and methylation of histones, remodeling of chromatin and heterochromatin-based gene silencing, in the acquisition of antifungal resistance. A comprehensive understanding of how pathogens acquire drug resistance will aid the development of new antifungal therapies as well as increase the efficacy of current antifungals by blocking common drug-resistance mechanisms. In this article, we describe the epigenetic mechanisms that affect resistance towards widely used systemic antifungal drugs: azoles, echinocandins and polyenes. Additionally, we review the literature on the possible links between DNA mismatch repair, gene silencing and drug-resistance mechanisms.
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18
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Shivarathri R, Jenull S, Chauhan M, Singh A, Mazumdar R, Chowdhary A, Kuchler K, Chauhan N. Comparative Transcriptomics Reveal Possible Mechanisms of Amphotericin B Resistance in Candida auris. Antimicrob Agents Chemother 2022; 66:e0227621. [PMID: 35652307 PMCID: PMC9211394 DOI: 10.1128/aac.02276-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 05/11/2022] [Indexed: 12/27/2022] Open
Abstract
Candida auris is an emerging multidrug-resistant human fungal pathogen often refractory to treatment by all classes of antifungal drugs. Amphotericin B (AmB) is a fungicidal drug that, despite its toxic side effects, remains a drug of choice for the treatment of drug-resistant fungal infections, including those caused by C. auris. However, the molecular mechanisms underlying AmB resistance are poorly understood. In this study, we present data that suggests membrane lipid alterations and chromatin modifications are critical processes that may contribute to or cause adaptive AmB resistance in clinical C. auris isolates. To determine the plausible cause of increased AmB resistance, we performed RNA-seq of AmB-resistant and sensitive C. auris isolates. Remarkably, AmB-resistant strains show a pronounced enrichment of genes involved in lipid and ergosterol biosynthesis, adhesion, drug transport as well as chromatin remodeling. The transcriptomics data confirm increased adhesion and reduced lipid membrane permeability of AmB-resistant strains compared to the sensitive isolates. The AmB-resistant strains also display hyper-resistance to cell wall perturbing agents, including Congo red, calcofluor white and caffeine. Additionally, we noticed an increased phosphorylation of Mkc1 cell integrity MAP kinase upon AmB treatment. Collectively, these data identify differences in the transcriptional landscapes of AmB-resistant versus AmB-sensitive isolates and provide a framework for the mechanistic understanding of AmB resistance in C. auris.
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Affiliation(s)
- Raju Shivarathri
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Sabrina Jenull
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Campus Vienna Biocenter, Medical University of Vienna, Vienna, Austria
- Functional Microbiology, Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, Vienna, Austria
| | - Manju Chauhan
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Ashutosh Singh
- Medical Mycology Unit, Department of Microbiology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
- National Reference Laboratory for Antimicrobial Resistance in Fungal Pathogens, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
| | - Rounik Mazumdar
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Campus Vienna Biocenter, Medical University of Vienna, Vienna, Austria
| | - Anuradha Chowdhary
- Medical Mycology Unit, Department of Microbiology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
- National Reference Laboratory for Antimicrobial Resistance in Fungal Pathogens, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
| | - Karl Kuchler
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Campus Vienna Biocenter, Medical University of Vienna, Vienna, Austria
| | - Neeraj Chauhan
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
- Department of Microbiology, Biochemistry and Molecular Genetics, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
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19
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Zhao G, Rusche LN. Sirtuins in Epigenetic Silencing and Control of Gene Expression in Model and Pathogenic Fungi. Annu Rev Microbiol 2022; 76:157-178. [PMID: 35609947 DOI: 10.1146/annurev-micro-041020-100926] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Fungi, including yeasts, molds, and mushrooms, proliferate on decaying matter and then adopt quiescent forms once nutrients are depleted. This review explores how fungi use sirtuin deacetylases to sense and respond appropriately to changing nutrients. Because sirtuins are NAD+-dependent deacetylases, their activity is sensitive to intracellular NAD+ availability. This allows them to transmit information about a cell's metabolic state on to the biological processes they influence. Fungal sirtuins are primarily known to deacetylate histones, repressing transcription and modulating genome stability. Their target genes include those involved in NAD+ homeostasis, metabolism, sporulation, secondary metabolite production, and virulence traits of pathogenic fungi. By targeting different genes over evolutionary time, sirtuins serve as rewiring points that allow organisms to evolve novel responses to low NAD+ stress by bringing relevant biological processes under the control of sirtuins. Expected final online publication date for the Annual Review of Microbiology, Volume 76 is September 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Guolei Zhao
- Department of Biological Sciences, University at Buffalo, The State University of New York, Buffalo, New York, USA; ,
| | - Laura N Rusche
- Department of Biological Sciences, University at Buffalo, The State University of New York, Buffalo, New York, USA; ,
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Lin Y, Gong T, Ma Q, Jing M, Zheng T, Yan J, Chen J, Pan Y, Sun Q, Zhou X, Li Y. Nicotinamide could reduce growth and cariogenic virulence of Streptococcus mutans. J Oral Microbiol 2022; 14:2056291. [PMID: 35341208 PMCID: PMC8956312 DOI: 10.1080/20002297.2022.2056291] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Dental caries is among the most prevalent chronic oral infectious diseases. Streptococcus mutans, a major cariogenic bacterial species, possesses several cariogenicity-associated characteristics, including exopolysaccharides (EPS) synthesis, biofilm formation, acidogenicity, and aciduricity. Nicotinamide (NAM), a form of vitamin B3, is a non-toxic, orally available, and inexpensive compound. The present study investigated the inhibitory effects of NAM on the cariogenic virulence factors of S. mutans in vitro and in vivo. NAM inhibited the growth of S. mutans UA159 and the clinical isolates. In addition, there was a decrease in the acid production and acid tolerance ability, as well as biofilm formation and EPS production of S. mutans after NAM treatment. Global gene expression profiling showed that 128 and 58 genes were significantly downregulated and upregulated, respectively, in NAM-treated S. mutans strains. The differentially expressed genes were mainly associated with carbohydrate transport and metabolism, glycolysis, acid tolerance. Moreover, in a rat caries model, NAM significantly reduced the incidence and severity of smooth and sulcal-surface caries in vivo. NAM exhibited good antimicrobial properties against S. mutans, indicating its potential value for antibiofilm and anti-caries applications.
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Affiliation(s)
- Yongwang Lin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Tao Gong
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Qizhao Ma
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Meiling Jing
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Ting Zheng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Jiangchuan Yan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Jiamin Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yangyang Pan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Qun Sun
- Key Laboratory of Bio-resources & Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yuqing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
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林 永, 敬 美, 李 雨, 周 学. [Inhibitory Effects of Nicotinamide on Streptococcus mutans Growth and Biofilm Formation]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2022; 53:268-273. [PMID: 35332728 PMCID: PMC10409360 DOI: 10.12182/20220360205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Indexed: 06/14/2023]
Abstract
Objective To explore the effects of nicotinamide (NAM) on the growth, biofilm formation and exopolysaccharides (EPS) production of Streptococcus mutans. Methods The minimum inhibitory concentration (MIC) of NAM on S. mutanswas determined by the planktonic bacterial susceptibility assay. The NAM mass concentrations were set as 1/2 MIC, 1/4 MIC and 1/8 MIC for hree separate treatment groups. Culture medium without NAM was used in the negative control group and culture medium containing 0.1 mg/mL NaF was used for the positive control group (except for the scanning electron microscopy). The growth curves of S. mutans under different NAM concentrations were drawn. Crystal violet assay and anthrone-sulfuric acid method were used to explore the effects of NAM on S. mutans biofilm formation and water-insoluble EPS production, respectively. The morphology and structure of S. mutansplanktons and biofilms after NAM treatment were observed by scanning electron microscopy. Results The MIC of NAM on S. mutans was 32 μg/μL. After 16 μg/μL (1/2 MIC), 8 μg/μL (1/4 MIC) and 4 μg/μL (1/8 MIC) NAM treatments, S. mutans growth and biofilm formation were inhibited, with the 16 μg/μL NAM group displaying the most significant inhibitory effects. The synthesis of EPS decreased significantly in the 16 μg/μL and 8 μg/μL NAM groups in comparison with that of the negative control group (P<0.05). Under scanning electron microscope, the cell length of S. mutans was shortened, the cell width was extended, and the length/width ratio was decreased, showing significant difference when comparing the 16 μg/μL and 8 μg/μL NAM groups with the negative control group (P<0.05). Conclusion Under the influence of NAM at certain concenrations, the growth, biofilm formation, and EPS synthesis of S. mutanswere inhibited.
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Affiliation(s)
- 永旺 林
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - 美玲 敬
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - 雨庆 李
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - 学东 周
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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22
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Mu Z, Guo J, Zhang D, Xu Y, Zhou M, Guo Y, Hou Y, Gao X, Han X, Geng L. Therapeutic Effects of Shikonin on Skin Diseases: A Review. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2022; 49:1871-1895. [PMID: 34961421 DOI: 10.1142/s0192415x21500889] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Shikonin is one of the primary active components extracted from the dried root ofZicao (Lithospermum erythrorhizon, Onosma paniculata, or Arnebia euchroma), a traditional Chinese herbal medicine. Shikonin is known to not only exert anti-proliferative, anti-inflammatory, and anti-angiogenic activities, but also play a crucial role in triggering the production of reactive oxygen species, suppressing the release of exosomes, and inducing apoptosis. Increasing evidence suggests that shikonin has a protective effect against skin diseases, including psoriasis, melanoma, and hypertrophic scars. In order to evaluate the application potential of shikonin in the treatment of skin diseases, this review is the first of its kind to provide comprehensive and up-to-date information regarding the uses of shikonin and its derivatives on skin diseases and its underlying mechanisms. In this review, we have focused on the signaling pathways and cellular targets involved in the anti-dermatosis effects of shikonin to bridge the gaps in the literature, thereby providing scientific support for the research and development of new drugs from a traditional medicinal plant.
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Affiliation(s)
- Zhenzhen Mu
- China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110000, P. R. China.,Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China.,Department of Dermatology, Shengjing Hospital of China Medical University, 36N, Sanhao Street, Heping District, Shenyang, Liaoning 110000, P. R. China
| | - Jinrong Guo
- China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110000, P. R. China.,Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China.,Department of Dermatology, Jincheng People's Hospital, 456N, Wenchang East Street, Jincheng, Shanxi 048000, P. R. China
| | - Dongxia Zhang
- Department of Dermatology, Zhongshan Torch Development Zone Hospital, 123N, Yixian Road, Torch Zone, Zhongshan 528400, Guangdong, P. R. China
| | - Yuanyuan Xu
- Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China
| | - Mingming Zhou
- China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110000, P. R. China.,Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China
| | - Yimeng Guo
- China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110000, P. R. China.,Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China
| | - Yuzhu Hou
- China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110000, P. R. China.,Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China
| | - Xinghua Gao
- Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China
| | - Xiuping Han
- Department of Dermatology, Shengjing Hospital of China Medical University, 36N, Sanhao Street, Heping District, Shenyang, Liaoning 110000, P. R. China
| | - Long Geng
- Department of Dermatology, No. 1 Hospital of China Medical University, 155N, Nanjing Street, Heping District, Shenyang, Liaoning 110000, P. R. China
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23
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Li Y, Li H, Sun T, Ding C. Pathogen-Host Interaction Repertoire at Proteome and Posttranslational Modification Levels During Fungal Infections. Front Cell Infect Microbiol 2021; 11:774340. [PMID: 34926320 PMCID: PMC8674643 DOI: 10.3389/fcimb.2021.774340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 11/15/2021] [Indexed: 12/22/2022] Open
Abstract
Prevalence of fungal diseases has increased globally in recent years, which often associated with increased immunocompromised patients, aging populations, and the novel Coronavirus pandemic. Furthermore, due to the limitation of available antifungal agents mortality and morbidity rates of invasion fungal disease remain stubbornly high, and the emergence of multidrug-resistant fungi exacerbates the problem. Fungal pathogenicity and interactions between fungi and host have been the focus of many studies, as a result, lots of pathogenic mechanisms and fungal virulence factors have been identified. Mass spectrometry (MS)-based proteomics is a novel approach to better understand fungal pathogenicities and host–pathogen interactions at protein and protein posttranslational modification (PTM) levels. The approach has successfully elucidated interactions between pathogens and hosts by examining, for example, samples of fungal cells under different conditions, body fluids from infected patients, and exosomes. Many studies conclude that protein and PTM levels in both pathogens and hosts play important roles in progression of fungal diseases. This review summarizes mass spectrometry studies of protein and PTM levels from perspectives of both pathogens and hosts and provides an integrative conceptual outlook on fungal pathogenesis, antifungal agents development, and host–pathogen interactions.
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Affiliation(s)
- Yanjian Li
- College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Hailong Li
- NHC Key Laboratory of AIDS Immunology (China Medical University), National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Tianshu Sun
- Medical Research Centre, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China.,Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases, Beijing, China
| | - Chen Ding
- College of Life and Health Sciences, Northeastern University, Shenyang, China
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24
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Wang W, Chen X, Yang Z, Chen X, Li C, Wang M. Crystal structure of histone chaperone Vps75 from Candida albicans. Biochem Biophys Res Commun 2021; 578:136-141. [PMID: 34562653 DOI: 10.1016/j.bbrc.2021.09.030] [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: 09/12/2021] [Accepted: 09/15/2021] [Indexed: 11/25/2022]
Abstract
Vps75 is a histone chaperone that interacts with the fungal-specific histone acetyltransferase Rtt109 and stimulates its acetylation activity on histone H3. Here we report the crystal structure of Vps75 of Candida albicans, one of the most common fungal pathogens. CaVps75 exists as a headphone-like dimer that forms a large negatively charged region on its concave side, showing the potential to bind positively charged regions of histones. The distal ends of the concave side of the CaVps75 dimer are positively charged and each has one more α helix than yeast Vps75. CaVps75 exhibits ionic strength- and concentration-dependent higher oligomerization in solution. In the crystal, two dimers are bound through electrostatic interactions between charged regions on the concave side of their earmuff domains, and this inter-dimer interaction differs from the currently known inter-dimer interactions of Vps75s. Our results will help to understand the role of Vps75 in C. albicans.
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Affiliation(s)
- Wenfeng Wang
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China; School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China
| | - Xi Chen
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China; School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China
| | - Zhongmei Yang
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China; School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China
| | - Xiaolei Chen
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China; School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China
| | - Changrun Li
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China
| | - Mingzhu Wang
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China; School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei, 230601, Anhui, China.
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25
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Wang J, Liu C, Chen Y, Zhao Y, Ma Z. Protein acetylation and deacetylation in plant-pathogen interactions. Environ Microbiol 2021; 23:4841-4855. [PMID: 34398483 DOI: 10.1111/1462-2920.15725] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 12/12/2022]
Abstract
Protein acetylation and deacetylation catalysed by lysine acetyltransferases (KATs) and deacetylases (KDACs), respectively, are major mechanisms regulating various cellular processes. During the fight between microbial pathogens and host plants, both apply a set of measures, including acetylation interference, to strengthen themselves while suppressing the other. In this review, we first summarize KATs and KDACs in plants and their pathogens. Next, we introduce diverse acetylation and deacetylation mechanisms affecting protein functions, including the regulation of enzyme activity and specificity, protein-protein or protein-DNA interactions, subcellular localization and protein stability. We then focus on the current understanding of acetylation and deacetylation in plant-pathogen interactions. Additionally, we also discuss potential acetylation-related approaches for controlling plant diseases.
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Affiliation(s)
- Jing Wang
- State Key Laboratory of Rice Biology, and Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Chao Liu
- State Key Laboratory of Rice Biology, and Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Yun Chen
- State Key Laboratory of Rice Biology, and Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Youfu Zhao
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Zhonghua Ma
- State Key Laboratory of Rice Biology, and Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
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26
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Jenull S, Mair T, Tscherner M, Penninger P, Zwolanek F, Silao FGS, de San Vicente KM, Riedelberger M, Bandari NC, Shivarathri R, Petryshyn A, Chauhan N, Zacchi LF, -Landmann SL, Ljungdahl PO, Kuchler K. The histone chaperone HIR maintains chromatin states to control nitrogen assimilation and fungal virulence. Cell Rep 2021; 36:109406. [PMID: 34289370 PMCID: PMC8493472 DOI: 10.1016/j.celrep.2021.109406] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 03/10/2021] [Accepted: 06/24/2021] [Indexed: 12/13/2022] Open
Abstract
Adaptation to changing environments and immune evasion is pivotal for fitness of pathogens. Yet, the underlying mechanisms remain largely unknown. Adaptation is governed by dynamic transcriptional re-programming, which is tightly connected to chromatin architecture. Here, we report a pivotal role for the HIR histone chaperone complex in modulating virulence of the human fungal pathogen Candida albicans. Genetic ablation of HIR function alters chromatin accessibility linked to aberrant transcriptional responses to protein as nitrogen source. This accelerates metabolic adaptation and increases the release of extracellular proteases, which enables scavenging of alternative nitrogen sources. Furthermore, HIR controls fungal virulence, as HIR1 deletion leads to differential recognition by immune cells and hypervirulence in a mouse model of systemic infection. This work provides mechanistic insights into chromatin-coupled regulatory mechanisms that fine-tune pathogen gene expression and virulence. Furthermore, the data point toward the requirement of refined screening approaches to exploit chromatin modifications as antifungal strategies.
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Affiliation(s)
- Sabrina Jenull
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria
| | - Theresia Mair
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria
| | - Michael Tscherner
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria
| | - Philipp Penninger
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria
| | - Florian Zwolanek
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria
| | - Fitz-Gerald S Silao
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Kontxi Martinez de San Vicente
- Section of Immunology, Vetsuisse Faculty, University of Zürich, 8006 Zürich, Switzerland; Institute of Experimental Immunology, University of Zürich, 8057 Zürich, Switzerland
| | - Michael Riedelberger
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria
| | - Naga C Bandari
- ARC Training Centre for Biopharmaceutical Innovation, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Raju Shivarathri
- Public Health Research Institute, Rutgers, The State University of New Jersey, Newark, NJ 07102, USA
| | - Andriy Petryshyn
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria
| | - Neeraj Chauhan
- Public Health Research Institute, Rutgers, The State University of New Jersey, Newark, NJ 07102, USA; Department of Microbiology, Biochemistry and Molecular Genetics, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Lucia F Zacchi
- ARC Training Centre for Biopharmaceutical Innovation, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Salomé LeibundGut -Landmann
- Section of Immunology, Vetsuisse Faculty, University of Zürich, 8006 Zürich, Switzerland; Institute of Experimental Immunology, University of Zürich, 8057 Zürich, Switzerland
| | - Per O Ljungdahl
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Karl Kuchler
- Department of Medical Biochemistry, Max Perutz Labs Vienna, Medical University of Vienna, Campus Vienna Biocenter, 1030 Vienna, Austria.
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Computational Drug Repurposing Resources and Approaches for Discovering Novel Antifungal Drugs against Candida albicans N-Myristoyl Transferase. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2021. [DOI: 10.22207/jpam.15.2.49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Candida albicans is a yeast that is an opportunistic fungal pathogen and also identified as ubiquitous polymorphic species that is mainly linked with major fungal infections in humans, particularly in the immunocompromised patients including transplant recipients, chemotherapy patients, HIV-infected patients as well as in low-birth-weight infants. Systemic Candida infections have a high mortality rate of around 29 to 76%. For reducing its infection, limited drugs are existing such as caspofungin, fluconazole, terbinafine, and amphotericin B, etc. which contain unlikable side effects and also toxic. This review intends to utilize advanced bioinformatics technologies such as Molecular docking, Scaffold hopping, Virtual screening, Pharmacophore modeling, Molecular dynamics (MD) simulation for the development of potentially new drug candidates with a drug-repurpose approach against Candida albicans within a limited time frame and also cost reductive.
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Ghugari R, Tsao S, Schmidt M, Bonneil É, Brenner C, Verreault A. Mechanisms to reduce the cytotoxicity of pharmacological nicotinamide concentrations in the pathogenic fungus Candida albicans. FEBS J 2021; 288:3478-3506. [PMID: 33155404 DOI: 10.1111/febs.15622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 09/13/2020] [Accepted: 11/04/2020] [Indexed: 12/29/2022]
Abstract
Candida albicans is a pathogenic fungus that causes systemic infections and mortality in immunosuppressed individuals. We previously showed that deacetylation of histone H3 lysine 56 by Hst3 is essential for C. albicans viability. Hst3 is a fungal-specific NAD+ -dependent protein deacetylase of the sirtuin family. In vivo, supraphysiological concentrations of nicotinamide (NAM) are required for Hst3 inhibition and cytotoxicity. This underscores the importance of identifying mechanisms by which C. albicans can modulate intracellular NAM concentrations. For the first time in a pathogenic fungus, we combine genetics, heavy isotope labeling, and targeted quantitative metabolomics to identify genes, pathways, and mechanisms by which C. albicans can reduce the cytotoxicity of high NAM concentrations. We discovered three distinct fates for supraphysiological NAM concentrations. First, upon transient exposure to NAM, high intracellular NAM concentrations rapidly return near the physiological levels observed in cells that are not exposed to NAM. Second, during the first step of a fungal-specific NAM salvage pathway, NAM is converted into nicotinic acid, a metabolite that cannot inhibit the sirtuin Hst3. Third, we provide evidence that NAM enters the NAD+ metabolome through a NAM exchange reaction that contributes to NAM-mediated inhibition of sirtuins. However, in contrast to the other fates of NAM, the NAM exchange reaction cannot cause a net decrease in the intracellular concentration of NAM. Therefore, this reaction cannot enhance resistance to NAM. In summary, we demonstrate that C. albicans possesses at least two mechanisms to attenuate the cytotoxicity of pharmacological NAM concentrations. It seems likely that those two mechanisms of resistance to cytotoxic NAM concentrations are conserved in many other pathogenic fungi.
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Affiliation(s)
- Rahul Ghugari
- Institute for Research in Immunology and Cancer, Université de Montréal, QC, Canada
- Programme de Biologie Moléculaire, Université de Montréal, QC, Canada
| | - Sarah Tsao
- Institute for Research in Immunology and Cancer, Université de Montréal, QC, Canada
| | - Mark Schmidt
- Department of Biochemistry, Carver College of Medicine, University of Iowa, IA, USA
| | - Éric Bonneil
- Institute for Research in Immunology and Cancer, Université de Montréal, QC, Canada
| | - Charles Brenner
- Department of Diabetes & Cancer Metabolism, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Alain Verreault
- Institute for Research in Immunology and Cancer, Université de Montréal, QC, Canada
- Département de Pathologie et Biologie Cellulaire, Université de Montréal, QC, Canada
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Fang L, Chen D, Zhang J, Li H, Bradford B, Jin C. Potential functions of histone H3.3 lysine 56 acetylation in mammals. Epigenetics 2021; 17:498-517. [PMID: 33902396 DOI: 10.1080/15592294.2021.1922198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
H3K56 acetylation (H3K56Ac) was first identified in yeast and has recently been reported to play important roles in maintaining genomic stability, chromatin assembly, DNA replication, cell cycle progression and DNA repair. Although H3.1K56Ac has been relatively well studied, the function of H3.3K56Ac remains mostly unknown in mammals. In this study, we used H3.3K56Q and H3.3K56R mutants to study the possible function of H3.3K56 acetylation. The K-to-Q substitution mimics a constitutively acetylated lysine, while the K-to-R replacement mimics a constitutively unmodified lysine. We report that cell lines harbouring mutation of H3.3K56R exhibit increased cell death and dramatic morphology changes. Using a Tet-Off inducible system, we found an increased population of polyploid/aneuploid cells and decreased cell viability in H3.3K56R mutant cells. Consistent with these results, the H3.3K56R mutant had compromised H3.3 incorporation into several pericentric and centric heterochromatin regions we tested. Moreover, mass spectrometry analysis coupled with label-free quantification revealed that biological processes regulated by the H3.3-associating proteins, whose interaction with H3.3 was markedly increased by H3.3K56Q mutation but decreased by H3.3K56R mutation, include sister chromatid cohesion, mitotic nuclear division, and mitotic nuclear envelope disassembly. These results suggest that H3.3K56 acetylation is crucial for chromosome segregation and cell division in mammals.
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Affiliation(s)
- Lei Fang
- Department of Environmental Medicine, New York University Grossman School of Medicine, New York, NY, USA.,Jiangsu Key Laboratory of Molecular Medicine, Chemistry and Biomedicine Innovation Center, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - Danqi Chen
- Department of Environmental Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Jingzi Zhang
- Jiangsu Key Laboratory of Molecular Medicine, Chemistry and Biomedicine Innovation Center, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - Hongjie Li
- Department of Environmental Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Beatrix Bradford
- Department of Environmental Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Chunyuan Jin
- Department of Environmental Medicine, New York University Grossman School of Medicine, New York, NY, USA
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Hammond-Martel I, Verreault A, Wurtele H. Chromatin dynamics and DNA replication roadblocks. DNA Repair (Amst) 2021; 104:103140. [PMID: 34087728 DOI: 10.1016/j.dnarep.2021.103140] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 11/27/2022]
Abstract
A broad spectrum of spontaneous and genotoxin-induced DNA lesions impede replication fork progression. The DNA damage response that acts to promote completion of DNA replication is associated with dynamic changes in chromatin structure that include two distinct processes which operate genome-wide during S-phase. The first, often referred to as histone recycling or parental histone segregation, is characterized by the transfer of parental histones located ahead of replication forks onto nascent DNA. The second, known as de novo chromatin assembly, consists of the deposition of new histone molecules onto nascent DNA. Because these two processes occur at all replication forks, their potential to influence a multitude of DNA repair and DNA damage tolerance mechanisms is considerable. The purpose of this review is to provide a description of parental histone segregation and de novo chromatin assembly, and to illustrate how these processes influence cellular responses to DNA replication roadblocks.
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Affiliation(s)
- Ian Hammond-Martel
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, 5415 boulevard de l'Assomption, Montreal, H1T 2M4, Canada
| | - Alain Verreault
- Institute for Research in Immunology and Cancer, Université de Montréal, P.O. Box 6128, Succursale Centre-Ville, Montreal, H3C 3J7, Canada; Département de Pathologie et Biologie Cellulaire, Université de Montréal, 2900 Edouard Montpetit Blvd, Montreal, H3T 1J4, Canada
| | - Hugo Wurtele
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, 5415 boulevard de l'Assomption, Montreal, H1T 2M4, Canada; Département de Médecine, Université de Montréal, Université de Montréal, 2900 Edouard Montpetit Blvd, Montreal, H3T 1J4, Canada.
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Abstract
Candida albicans is a major human fungal pathogen that encounters varied host environments during infection. In response to environmental cues, C. albicans switches between ovoid yeast and elongated hyphal growth forms, and this morphological plasticity contributes to virulence. Environmental changes that alter the cell's metabolic state could be sensed by sirtuins, which are NAD+-dependent deacetylases. Here, we studied the roles of three sirtuin deacetylases-Sir2, Hst1, and Hst2-in the hyphal growth of C. albicans We made single, double, and triple sirtuin knockout strains and tested their ability to switch from yeast to hyphae. We found that true hypha formation was significantly reduced by the deletion of SIR2 but not HST1 or HST2 Moreover, the expression of hypha-specific genes HWP1, ALS3, and ECE1 decreased in the sir2Δ/Δ mutant compared to the wild type. This regulation of hypha formation was likely dependent on the deacetylase activity of Sir2, as a similar defect in hypha formation was observed when an asparagine known to be required for deacetylation was mutated. Finally, we found that Sir2 and Hst1 were localized to the nucleus, with Sir2 specifically focused in the nucleolus. This nuclear localization suggests a role for Sir2 and Hst1 in regulating gene expression. In contrast, Hst2 was localized to the cytoplasm. In conclusion, our results suggest that Sir2 plays a critical and nonredundant role in hyphal growth of C. albicans IMPORTANCE Candida albicans is one of the most common causes of hospital-acquired systemic fungal infections in the United States. It can switch between ovoid yeast and elongated hyphal growth forms in response to environmental cues. This morphological transition is essential for its survival in the host. Thus, identifying regulators involved in this process can lead to new therapies. In this study, we examined the contribution of three regulators called sirtuins (Sir2, Hst1, and Hst2) to the yeast-to-hypha transition of C. albicans We found that loss of Sir2 but not Hst1 or Hst2 hampered hypha formation. Moreover, the defect was caused by the loss of the catalytic activity of Sir2. Our study may lay the groundwork for discovering novel targets for antifungal therapies.
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Demin KA, Refeld AG, Bogdanova AA, Prazdnova EV, Popov IV, Kutsevalova OY, Ermakov AM, Bren AB, Rudoy DV, Chistyakov VA, Weeks R, Chikindas ML. Mechanisms of Candida Resistance to Antimycotics and Promising Ways to Overcome It: The Role of Probiotics. Probiotics Antimicrob Proteins 2021; 13:926-948. [PMID: 33738706 DOI: 10.1007/s12602-021-09776-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2021] [Indexed: 12/12/2022]
Abstract
Pathogenic Candida and infections caused by those species are now considered as a serious threat to public health. The treatment of candidiasis is significantly complicated by the increasing resistance of pathogenic strains to current treatments and the stagnant development of new antimycotic drugs. Many species, such as Candida auris, have a wide range of resistance mechanisms. Among the currently used synthetic and semi-synthetic antifungal drugs, the most effective are azoles, echinocandins, polyenes, nucleotide analogs, and their combinations. However, the use of probiotic microorganisms and/or the compounds they produce is quite promising, although underestimated by modern pharmacology, to control the spread of pathogenic Candida species.
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Affiliation(s)
- Konstantin A Demin
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Aleksandr G Refeld
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Anna A Bogdanova
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Evgenya V Prazdnova
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Igor V Popov
- Center for Agrobiotechnology, Don State Technical University, Rostov-on-Don, Russia
| | | | - Alexey M Ermakov
- Center for Agrobiotechnology, Don State Technical University, Rostov-on-Don, Russia
| | - Anzhelica B Bren
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia.,Center for Agrobiotechnology, Don State Technical University, Rostov-on-Don, Russia
| | - Dmitry V Rudoy
- Center for Agrobiotechnology, Don State Technical University, Rostov-on-Don, Russia
| | - Vladimir A Chistyakov
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Richard Weeks
- Health Promoting Naturals Laboratory, School of Environmental and Biological Sciences, Rutgers State University, New Brunswick, NJ, USA
| | - Michael L Chikindas
- Center for Agrobiotechnology, Don State Technical University, Rostov-on-Don, Russia. .,Health Promoting Naturals Laboratory, School of Environmental and Biological Sciences, Rutgers State University, New Brunswick, NJ, USA. .,I.M. Sechenov First Moscow State Medical University, Moscow, Russia.
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Systematic Analysis of the Lysine Crotonylome and Multiple Posttranslational Modification Analysis (Acetylation, Succinylation, and Crotonylation) in Candida albicans. mSystems 2021; 6:6/1/e01316-20. [PMID: 33500332 PMCID: PMC7842366 DOI: 10.1128/msystems.01316-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Candida albicans is an opportunistic pathogen that causes lethal fungal infections in immunocompromised patients. Lysine crotonylation is a newly discovered PTM (posttranslational modification) epigenetic type that may play a critical role in regulating gene expression. In this study, we used an antibody-enrichment approach along with LC-MS/MS to carry out a quantitative crotonylome analysis in C. albicans We found a total of 5,242 crotonylation sites and 1,584 crotonylated proteins among 9,038 proteins in this organism. Of these crotonylated proteins, a few unique crotonylated motifs are noted such as D and E in positions +1, +2, or +3 or K and R in positions +5 or +6, while A, E, F, G, P, W, and Y are in the -1 position or A, K, and R are found in positions -5, -6, -7, or -8. Functional analysis has shown that a majority of the crotonylated proteins are related to biosynthetic events and carbon metabolism. When combined with previously collected data on acetylation and succinylation, PPI (protein-protein interaction network) analysis reveals that proteins with functions in ribosomal biogenesis, oxidative phosphorylation, nucleus activity, and proteasome formation are heavily modified by these three PTM types. To the best of our knowledge, this is the first crotonylome study carried out in C. albicans and is an important step to a better understanding of the biological and pathogenic impact of PTM in C. albicans IMPORTANCE C. albicans is a kind of pathogen of fungal infections that is found worldwide. Lysine crotonylation of proteins as a recently discovered PTM (posttranslational modification) may have a critical role in regulating cells. We first carried out large-scale analysis of crotonylated proteome and multiple PTM analysis (acetylation, succinylation, and crotonylation), then drew a diagram to show multiple PTM sites on histones in C. albicans of our study. This study about crotonylome in human pathogenic fungi is a milestone that first and deeply investigates the functional analysis of crotonylated proteins in C. albicans, which marks an important start for further research.
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Madaan P, Sikka P, Malik DS. Cosmeceutical Aptitudes of Niacinamide: A Review. RECENT ADVANCES IN ANTI-INFECTIVE DRUG DISCOVERY 2021; 16:196-208. [PMID: 34844552 DOI: 10.2174/2772434416666211129105629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/06/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND The prevalence and scope of dermatological illness differ from region to region. Based upon type and severity, the conditions may vary from superficial to deep systemic skin infections. Niacinamide, an amide analog of vitamin B3 which was conventionally utilized as a food supplement, is now explored for the management of skin disorders. Being a powerhouse on its own, it is not stored inside the body naturally and has to be acquired from external sources. Areas Covered: This review is an attempt to disclose the physiology, pharmacology, and highlight the dermatological potentials of niacinamide, discussing its pharmacological mechanisms, varied commercially available treatments, and novel approaches, i.e., in research and patented formulations. RESULTS Niacinamide has been verified in treating almost every skin disorder, viz. aging, hyperpigmentation, acne, psoriasis, pruritus, dermatitis, fungal infections, epidermal melasma, non-melanoma skin cancer, etc. It has been reported to possess numerous properties, for instance, anti-inflammatory, antimicrobial, antioxidant, antipruritic, and anticancer, which makes it an ideal ingredient for varied dermal therapies. Long term use of niacinamide, regardless of the skin type, paves the way for new skin cells, making skin healthier, brighter, and hydrated. CONCLUSION Niacinamide possesses a variety of positive characteristics in the field of dermatology. Novel approaches are warranted over current treatments which could bypass the above shortcomings and form an effective and stable system. Hence, niacinamide has the potential to become an individual and a productive component with wide future scope.
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Affiliation(s)
- Piyush Madaan
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab,India
| | - Priyanshi Sikka
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab,India
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Zhu W, Fan X, Zhao Q, Xu Y, Wang X, Chen J. Bre1 and Ubp8 regulate H2B mono-ubiquitination and the reversible yeast-hyphae transition in Candida albicans. Mol Microbiol 2020; 115:332-343. [PMID: 33010070 DOI: 10.1111/mmi.14619] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 09/23/2020] [Accepted: 09/26/2020] [Indexed: 02/06/2023]
Abstract
The reversible yeast-hyphae transition of the human fungal pathogen Candida albicans is tightly linked to its pathogenicity. In this study, we show that histone H2B mono-ubiquitination (H2Bub) at lysine 123 was maintained at a low level in the yeast state, whereas it increased significantly during yeast-to-hyphae transition and decreased when hyphae converted to yeast. The increased H2Bub level is correlated with activation of the hyphal program. H2B ubiquitination and deubiquitination are dynamically regulated by the E3 ligase Bre1 and the deubiquitinase Ubp8 during the reversible yeast-hyphae transition. The functions of Bre1 and Ubp8 in hypha-specific gene (HSG) regulation appears to be direct because both are recruited to the coding regions of HSGs during hyphal induction. The sequential recruitment of Bre1 and Ubp8 to HSGs coding regions is important for the initiation and maintenance of HSG expression. Additionally, Ubp8 contributes to the pathogenicity of C. albicans during early infection in a mouse model. Our study is the first to link H2B ubiquitination to the morphological plasticity and pathogenicity of the human fungal pathogen C. albicans and shed light on potential antifungal treatments.
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Affiliation(s)
- Wencheng Zhu
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xueyi Fan
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Qun Zhao
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yinxing Xu
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiongjun Wang
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Jiangye Chen
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
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Vahedi-Shahandashti R, Lass-Flörl C. Novel Antifungal Agents and Their Activity against Aspergillus Species. J Fungi (Basel) 2020; 6:E213. [PMID: 33050302 PMCID: PMC7711508 DOI: 10.3390/jof6040213] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 09/30/2020] [Accepted: 10/07/2020] [Indexed: 12/11/2022] Open
Abstract
There is a need for new antifungal agents, mainly due to increased incidence of invasive fungal infections (IFI), high frequency of associated morbidity and mortality and limitations of the current antifungal agents (e.g., toxicity, drug-drug interactions, and resistance). The clinically available antifungals for IFI are restricted to four main classes: polyenes, flucytosine, triazoles, and echinocandins. Several antifungals are hampered by multiple resistance mechanisms being present in fungi. Consequently, novel antifungal agents with new targets and modified chemical structures are required to combat fungal infections. This review will describe novel antifungals, with a focus on the Aspergillus species.
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Affiliation(s)
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University Innsbruck, 6020 Innsbruck, Austria;
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Chen J, Liu Q, Zeng L, Huang X. Protein Acetylation/Deacetylation: A Potential Strategy for Fungal Infection Control. Front Microbiol 2020; 11:574736. [PMID: 33133044 PMCID: PMC7579399 DOI: 10.3389/fmicb.2020.574736] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 09/17/2020] [Indexed: 12/13/2022] Open
Abstract
Protein acetylation is a universal post-translational modification that fine-tunes the major cellular processes of many life forms. Although the mechanisms regulating protein acetylation have not been fully elucidated, this modification is finely tuned by both enzymatic and non-enzymatic mechanisms. Protein deacetylation is the reverse process of acetylation and is mediated by deacetylases. Together, protein acetylation and deacetylation constitute a reversible regulatory protein acetylation network. The recent application of mass spectrometry-based proteomics has led to accumulating evidence indicating that reversible protein acetylation may be related to fungal virulence because a substantial amount of virulence factors are acetylated. Additionally, the relationship between protein acetylation/deacetylation and fungal drug resistance has also been proven and the potential of deacetylase inhibitors as an anti-infective treatment has attracted attention. This review aimed to summarize the research progress in understanding fungal protein acetylation/deacetylation and discuss the mechanism of its mediation in fungal virulence, providing novel targets for the treatment of fungal infection.
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Affiliation(s)
- Junzhu Chen
- Department of Medical Microbiology, School of Medicine, Nanchang University, Nanchang, China
| | - Qiong Liu
- Department of Medical Microbiology, School of Medicine, Nanchang University, Nanchang, China
| | - Lingbing Zeng
- The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiaotian Huang
- Department of Medical Microbiology, School of Medicine, Nanchang University, Nanchang, China
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Jenull S, Tscherner M, Mair T, Kuchler K. ATAC-Seq Identifies Chromatin Landscapes Linked to the Regulation of Oxidative Stress in the Human Fungal Pathogen Candida albicans. J Fungi (Basel) 2020; 6:jof6030182. [PMID: 32967096 PMCID: PMC7559329 DOI: 10.3390/jof6030182] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 12/12/2022] Open
Abstract
Human fungal pathogens often encounter fungicidal stress upon host invasion, but they can swiftly adapt by transcriptional reprogramming that enables pathogen survival. Fungal immune evasion is tightly connected to chromatin regulation. Hence, fungal chromatin modifiers pose alternative treatment options to combat fungal infections. Here, we present an assay for transposase-accessible chromatin using sequencing (ATAC-seq) protocol adapted for the opportunistic pathogen Candida albicans to gain further insight into the interplay of chromatin accessibility and gene expression mounted during fungal adaptation to oxidative stress. The ATAC-seq workflow not only facilitates the robust detection of genomic regions with accessible chromatin but also allows for the precise modeling of nucleosome positions in C. albicans. Importantly, the data reveal genes with altered chromatin accessibility in upstream regulatory regions, which correlate with transcriptional regulation during oxidative stress. Interestingly, many genes show increased chromatin accessibility without change in gene expression upon stress exposure. Such chromatin signatures could predict yet unknown regulatory factors under highly dynamic transcriptional control. Additionally, de novo motif analysis in genomic regions with increased chromatin accessibility upon H2O2 treatment shows significant enrichment for Cap1 binding sites, a major factor of oxidative stress responses in C. albicans. Taken together, the ATAC-seq workflow enables the identification of chromatin signatures and highlights the dynamics of regulatory mechanisms mediating environmental adaptation of C. albicans.
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Akhavantabib N, Krzizike DD, Neumann V, D'Arcy S. Stoichiometry of Rtt109 complexes with Vps75 and histones H3-H4. Life Sci Alliance 2020; 3:3/11/e202000771. [PMID: 32913112 PMCID: PMC7494816 DOI: 10.26508/lsa.202000771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/31/2020] [Accepted: 09/01/2020] [Indexed: 11/24/2022] Open
Abstract
The work determines the relative and absolute stoichiometry of a 5-chain protein complex involved in histone chaperoning and acetylation. Using sedimentation velocity and light scattering, it uncovers a dynamic equilibrium of complex self-association. Histone acetylation is one of many posttranslational modifications that affect nucleosome accessibility. Vps75 is a histone chaperone that stimulates Rtt109 acetyltransferase activity toward histones H3-H4 in yeast. In this study, we use sedimentation velocity and light scattering to characterize various Vps75–Rtt109 complexes, both with and without H3-H4. These complexes were previously ill-defined because of protein multivalency and oligomerization. We determine both relative and absolute stoichiometry and define the most pertinent and homogeneous complexes. We show that the Vps75 dimer contains two unequal binding sites for Rtt109, with the weaker binding site being dispensable for H3-H4 acetylation. We further show that the Vps75–Rtt109–(H3-H4) complex is in equilibrium between a 2:1:1 species and a 4:2:2 species. Using a dimerization mutant of H3, we show that this equilibrium is mediated by the four-helix bundle between the two copies of H3. We optimize the purity, yield, and homogeneity of Vps75–Rtt109 complexes and determine optimal conditions for solubility when H3-H4 is added. Our comprehensive biochemical and biophysical approach ultimately defines the large-scale preparation of Vps75–Rtt109–(H3-H4) complexes with precise stoichiometry. This is an essential prerequisite for ongoing high-resolution structural and functional analysis of this important multi-subunit complex.
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Affiliation(s)
- Noushin Akhavantabib
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, USA
| | - Daniel D Krzizike
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO, USA
| | - Victoria Neumann
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, USA
| | - Sheena D'Arcy
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, USA
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Yuan YG, Wang JL, Mesalam A, Li L, Choi YJ, Talimur Reza AMM, Zhou D, Chen L, Qian C. Nicotinamide-induced mouse embryo developmental defect rescued by resveratrol and I-CBP112. Mol Reprod Dev 2020; 87:1009-1017. [PMID: 32818292 DOI: 10.1002/mrd.23405] [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: 05/13/2020] [Revised: 06/16/2020] [Accepted: 07/13/2020] [Indexed: 11/08/2022]
Abstract
Cell cycle of mouse embryo could be delayed by nicotinamide (NAM). Histone H3 lysine 56 (H3K56ac) acetylation plays an important role in mammalian genomic stability and the function of this modification in mouse embryos is not known. Hence, we designed to study the effects of NAM-induced oxidative stress on the developmental ability of mouse embryos, on the acetylation of H3K56ac and the possible functions of this modification related to mouse embryo development. Treatment with NAM (10, 20, or 40 mmol/L for 24 or 48 hr) during in vitro culture significantly decreased developmental rate of blastocyst (24 hr: 90.2 vs. 81.2, 43.2, and 18.2, with p > .05, p < .01, respectively; 48 hr: 89.3 vs. 53.2%, 12.1%, and 0% with p < .05, respectively). NAM treatment (20 mmol/L) for 6 and 31 hr resulted in increased intracellular reactive oxygen species levels in two-cell embryos, and apoptotic cell numbers in blastocysts. Resveratrol (RSV) and I-CBP112 rescued the 20 mmol/L NAM-induced embryo developmental defects. RSV and I-CBP112 increased the level of Sirt1 and decreased the level of H3K56ac induced by NAM in two-cell embryos (p < .05). These data suggest that NAM treatment decreases the expression of Sirt1, which induces high levels of H3K56 acetylation that may be involved in oxidative stress-induced mouse embryo defects, which can be rescued by RSV and I-CBP112.
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Affiliation(s)
- Yu-Guo Yuan
- Department of Theriogenology, College of Veterinary Medicine/Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses/Jiangsu Key Laboratory of Zoonosis/Jiangsu Key Laboratory of Animal genetic Breeding and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China.,Department of Stem cell and Regenerative Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Jia-Lin Wang
- Department of Theriogenology, College of Veterinary Medicine/Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Ayman Mesalam
- Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Ling Li
- Department of Theriogenology, College of Veterinary Medicine/Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yun-Jung Choi
- Department of Stem cell and Regenerative Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Abu Musa Md Talimur Reza
- Division of Bioinformatics, Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, Poland
| | - Dongjie Zhou
- Department of Stem cell and Regenerative Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Li Chen
- Department of Theriogenology, College of Veterinary Medicine/Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Chen Qian
- Department of Theriogenology, College of Veterinary Medicine/Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
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Chromatin Structure and Drug Resistance in Candida spp. J Fungi (Basel) 2020; 6:jof6030121. [PMID: 32751495 PMCID: PMC7559719 DOI: 10.3390/jof6030121] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/21/2020] [Accepted: 07/25/2020] [Indexed: 12/14/2022] Open
Abstract
Anti-microbial resistance (AMR) is currently one of the most serious threats to global human health and, appropriately, research to tackle AMR garnishes significant investment and extensive attention from the scientific community. However, most of this effort focuses on antibiotics, and research into anti-fungal resistance (AFR) is vastly under-represented in comparison. Given the growing number of vulnerable, immunocompromised individuals, as well as the positive impact global warming has on fungal growth, there is an immediate urgency to tackle fungal disease, and the disturbing rise in AFR. Chromatin structure and gene expression regulation play pivotal roles in the adaptation of fungal species to anti-fungal stress, suggesting a potential therapeutic avenue to tackle AFR. In this review we discuss both the genetic and epigenetic mechanisms by which chromatin structure can dictate AFR mechanisms and will present evidence of how pathogenic yeast, specifically from the Candida genus, modify chromatin structure to promote survival in the presence of anti-fungal drugs. We also discuss the mechanisms by which anti-chromatin therapy, specifically lysine deacetylase inhibitors, influence the acquisition and phenotypic expression of AFR in Candida spp. and their potential as effective adjuvants to mitigate against AFR.
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Su S, Li X, Yang X, Li Y, Chen X, Sun S, Jia S. Histone acetylation/deacetylation in Candida albicans and their potential as antifungal targets. Future Microbiol 2020; 15:1075-1090. [PMID: 32854542 DOI: 10.2217/fmb-2019-0343] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recently, the incidence of invasive fungal infections has significantly increased. Candida albicans (C. albicans) is the most common opportunistic fungal pathogen that infects humans. The limited number of available antifungal agents and the emergence of drug resistance pose difficulties to treatment, thus new antifungals are urgently needed. Through their functions in DNA replication, DNA repair and transcription, histone acetyltransferases (HATs) and histone deacetylases (HDACs) perform essential functions relating to growth, virulence, drug resistance and stress responses of C. albicans. Here, we summarize the physiological and pathological functions of HATs/HDACs, potential antifungal targets and underlying antifungal compounds that impact histone acetylation and deacetylation. We anticipate this review will stimulate the identification of new HAT/HDAC-related antifungal targets and antifungal agents.
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Affiliation(s)
- Shan Su
- School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong Province, People’s Republic of China
| | - Xiuyun Li
- Department of Pharmacy, Qilu Children’s Hospital, Shandong University, Jinan 250022, China
| | - Xinmei Yang
- Department of Clinical Pharmacy, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan 250014, Shandong Province, People’s Republic of China
| | - Yiman Li
- School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong Province, People’s Republic of China
| | - Xueqi Chen
- School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong Province, People’s Republic of China
| | - Shujuan Sun
- Department of Clinical Pharmacy, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan 250014, Shandong Province, People’s Republic of China
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong Province, People’s Republic of China
| | - Shuang Jia
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong Province, People’s Republic of China
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43
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Wahab S, Saettone A, Nabeel-Shah S, Dannah N, Fillingham J. Exploring the Histone Acetylation Cycle in the Protozoan Model Tetrahymena thermophila. Front Cell Dev Biol 2020; 8:509. [PMID: 32695779 PMCID: PMC7339932 DOI: 10.3389/fcell.2020.00509] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 05/28/2020] [Indexed: 12/22/2022] Open
Abstract
The eukaryotic histone acetylation cycle is composed of three classes of proteins, histone acetyltransferases (HATs) that add acetyl groups to lysine amino acids, bromodomain (BRD) containing proteins that are one of the most characterized of several protein domains that recognize acetyl-lysine (Kac) and effect downstream function, and histone deacetylases (HDACs) that catalyze the reverse reaction. Dysfunction of selected proteins of these three classes is associated with human disease such as cancer. Additionally, the HATs, BRDs, and HDACs of fungi and parasitic protozoa present potential drug targets. Despite their importance, the function and mechanisms of HATs, BRDs, and HDACs and how they relate to chromatin remodeling (CR) remain incompletely understood. Tetrahymena thermophila (Tt) provides a highly tractable single-celled free-living protozoan model for studying histone acetylation, featuring a massively acetylated somatic genome, a property that was exploited in the identification of the first nuclear/type A HAT Gcn5 in the 1990s. Since then, Tetrahymena remains an under-explored model for the molecular analysis of HATs, BRDs, and HDACs. Studies of HATs, BRDs, and HDACs in Tetrahymena have the potential to reveal the function of HATs and BRDs relevant to both fundamental eukaryotic biology and to the study of disease mechanisms in parasitic protozoa.
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Affiliation(s)
| | | | | | | | - Jeffrey Fillingham
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
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Oliaee RT, Sharifi I, Bamorovat M, Keyhani A, Babaei Z, Salarkia E, Tavakoly R, Khosravi A, Mostafavi M, Sharifi F, Mousavi SM. The potential role of nicotinamide on Leishmania tropica: An assessment of inhibitory effect, cytokines gene expression and arginase profiling. Int Immunopharmacol 2020; 86:106704. [PMID: 32590317 DOI: 10.1016/j.intimp.2020.106704] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/30/2020] [Accepted: 06/11/2020] [Indexed: 11/26/2022]
Abstract
Leishmaniasis represents a major health concern worldwide which has no effective treatment modality. Nicotinamide (NAm) has been used for a wide range of applications from anticancer to antimicrobial usage. This study aimed to assess the effect of NAm combination on Leishmania tropica Inhibition, as well as on cytokines gene expression and arginase (ARG) activity in L. tropica-infected macrophages in an in vitro model. The leishmanicidal effects of NAm and Glucantime (meglumine antimoniate, MA) alone and in combination (NAm/MA) were evaluated using a colorimetric assay and macrophage model. Additionally, immunomodulatory effects and enzymatic activity were assessed by analyzing Th1 and Th2 cytokines gene expression and ARG level, respectively, in infected macrophages treated with NAm and MA, alone and in combination. Findings indicated that the NAm/MA combination demonstrated greater inhibitory effects on L. tropica promastigotes and amastigotes compared with each drug individually. Docking results proved the affinity of NAm to IFN-γ, which can affirm the increased levels of IFN-γ, IL-12p40 and TNF-α as well as reductions in IL-10 secretion with a dose-response effect, especially in the combination group. The NAm/MA combination also showed a significant reduction in the level of ARG activity at all concentrations used compared to each drug individually. These findings indicate higher effectiveness of NAm plus MA in reducing parasite growth, promoting immune response and inhibiting ARG level. This combination should be considered as a potential therapeutic regimen for treatment of volunteer patients with anthroponotic cutaneous leishmaniasis (ACL) in future control programs.
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Affiliation(s)
- Razieh Tavakoli Oliaee
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran; Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Iraj Sharifi
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran.
| | - Mehdi Bamorovat
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Alireza Keyhani
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Zahra Babaei
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Ehsan Salarkia
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Rahele Tavakoly
- Student Research Committee, School of Health, Kerman University of Medical Sciences, Kerman, Iran; Nutrition Research Center, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ahmad Khosravi
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Mahshid Mostafavi
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Fatemeh Sharifi
- Research Center of Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran
| | - Seyed Mohammad Mousavi
- Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
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45
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Wassano NS, Leite AB, Reichert-Lima F, Schreiber AZ, Moretti NS, Damasio A. Lysine acetylation as drug target in fungi: an underexplored potential in Aspergillus spp. Braz J Microbiol 2020; 51:673-683. [PMID: 32170592 DOI: 10.1007/s42770-020-00253-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 02/28/2020] [Indexed: 12/18/2022] Open
Abstract
In recent years, the intensification of the use of immunosuppressive therapies has increased the incidence of invasive infections caused by opportunistic fungi. Considering that, the spread of azole resistance and amphotericin B (AmB) inefficiency against some clinical and environmental isolates has been described. Thus, to avoid a global problem when controlling fungal infections and critical failures in medicine, and food security, new approaches for drug target identification and for the development of new treatments that are more effective against pathogenic fungi are desired. Recent studies indicate that protein acetylation is present in hundreds of proteins of different cellular compartments and is involved in several biological processes, i.e., metabolism, translation, gene expression regulation, and oxidative stress response, from prokaryotes and eukaryotes, including fungi, demonstrating that lysine acetylation plays an important role in essential mechanisms. Lysine acetyltransferases (KATs) and lysine deacetylases (KDACs), the two enzyme families responsible for regulating protein acetylation levels, have been explored as drug targets for the treatment of several human diseases and infections. Aspergilli have on average 8 KAT genes and 11 KDAC genes in their genomes. This review aims to summarize the available knowledge about Aspergillus spp. azole resistance mechanisms and the role of lysine acetylation in the control of biological processes in fungi. We also want to discuss the lysine acetylation as a potential target for fungal infection treatment and drug target discovery.
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Affiliation(s)
- Natália Sayuri Wassano
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Ariely Barbosa Leite
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Franqueline Reichert-Lima
- Department of Clinical Pathology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Angelica Zaninelli Schreiber
- Department of Clinical Pathology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Nilmar S Moretti
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil.
| | - André Damasio
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
- Experimental Medicine Research Cluster (EMRC), University of Campinas (UNICAMP), Campinas, SP, Brazil.
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Abstract
Lysine (or histone) acetyltransferases plays a key role in genome maintenance and gene regulation and dysregulation of acetylation is a recognized feature of many diseases, including several cancers. Here, the patent landscape surrounding lysine acetyltransferase inhibitors (KATi or HATi), with a focus on small-molecule compounds, is outlined and assessed. Overall, the 36 KATi-specific patents found were categorized into two distinct groups: specific small-molecule inhibitors (compounds and molecules) and patents applying KATi for targeted disease treatment. These patents recognize the emergent potential of KATi to significantly impact on the management of many diseases (including multiple cancer types, neurological disorders and immunological syndromes), improving the range of treatments (and drug classes) available for personalized medicine.
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47
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Liao Z, Zhu Z, Li L, Wang L, Wang H, Jiang Y, Cao Y. Metabonomics on Candida albicans indicate the excessive H3K56ac is involved in the antifungal activity of Shikonin. Emerg Microbes Infect 2020; 8:1243-1253. [PMID: 31452461 PMCID: PMC6735332 DOI: 10.1080/22221751.2019.1657362] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Development of antifungal agents with novel mechanism and low toxicity are essential due to the prevalence of the infectious diseases caused by Candida albicans. The current study employed a new research method, which combined the ultra-high performance liquid chromatography with quadrupole time-of-flight mass spectrometry and gas chromatography-mass spectrometry, to investigate the intrinsic mechanism of Shikonin (SK) against C. albicans. The levels of 27 metabolites, which mainly involved in histone deacetylation, amino acid synthesis, lipid synthesis, nitrogen metabolism, tricarboxylic acid cycle, oxidative stress and glycolysis, were remarkably changed upon SK treatment. Specially, the down-regulation of nicotinamide (NAM) upon SK treatment indicated the suppression of the deacetylation of the histone H3 on lysine 56 residue (H3K56). Further experiment confirmed that the level of H3K56 acetylation (H3K56ac) was dramatically increased upon SK treatment which was mediated by HST3, the gene encoding the H3K56 deacetylase (Hst3p). Our results demonstrated that SK is the first natural compound reported to execute antifungal activity directly via boosting H3K56ac mediated by HST3. Importantly, this finding shed new light on the mechanisms to relieve the side effects or reverse the drug tolerance, as well as the development of agents for antifungal therapies.
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Affiliation(s)
- ZeBin Liao
- Department of Radiation Medicine, Faculty of Naval Medicine, Second Military Medical University , Shanghai , People's Republic of China.,Shanghai Skin Disease Hospital, Tongji University School of Medicine , Shanghai , People's Republic of China
| | - ZhenYu Zhu
- School of Pharmacy, Second Military Medical University , Shanghai , People's Republic of China
| | - Ling Li
- School of Pharmacy, Second Military Medical University , Shanghai , People's Republic of China
| | - Liang Wang
- School of Pharmacy, Second Military Medical University , Shanghai , People's Republic of China
| | - Hui Wang
- School of Pharmacy, Second Military Medical University , Shanghai , People's Republic of China
| | - YuanYing Jiang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine , Shanghai , People's Republic of China
| | - YingYing Cao
- Shanghai Skin Disease Hospital, Tongji University School of Medicine , Shanghai , People's Republic of China
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48
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Satish S, Perlin DS. Echinocandin Resistance in Aspergillus fumigatus Has Broad Implications for Membrane Lipid Perturbations That Influence Drug-Target Interactions. Microbiol Insights 2019; 12:1178636119897034. [PMID: 35185336 PMCID: PMC8855445 DOI: 10.1177/1178636119897034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 11/13/2019] [Indexed: 01/13/2023] Open
Abstract
Echinocandin drugs target the fungal enzyme β-(1,3)-glucan synthase (GS), which is required for the synthesis of cell wall component β-(1,3)-d-glucan. They are first-line therapy for Candida infections but are increasingly used as second-line therapy for Aspergillus infections. Resistance to echinocandins has been mainly studied in Candida and occurs due to mutations in FKS genes encoding GS. In our recent report, we identified a novel mechanism of echinocandin resistance in Aspergillus fumigatus. We showed that caspofungin exposure modifies GS, rendering it insensitive to echinocandins. This mechanism of resistance involved alteration of the GS lipid microenvironment and was mediated via an off-target effect on mitochondria leading to increased reactive oxygen species (ROS). We hypothesized that caspofungin-induced ROS alters the lipid composition around GS, changing its conformation and making it insensitive to echinocandins. In this commentary, we review both fks1-dependent and fks1-independent mechanisms of echinocandin resistance in A fumigatus. We believe this new resistance mechanism is also conserved among Candida spp. with implications for drug tolerance and/or resistance. Furthermore, we propose that ROS acts as a signaling molecule regulating lipid biogenesis, which impacts the structure-function of membrane proteins with implications for other types of drug-target interactions.
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Affiliation(s)
- Shruthi Satish
- Center for Discovery and Innovation, Hackensack Meridian Health, Nutley, NJ, USA
| | - David S Perlin
- Center for Discovery and Innovation, Hackensack Meridian Health, Nutley, NJ, USA
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49
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Chang Z, Yadav V, Lee SC, Heitman J. Epigenetic mechanisms of drug resistance in fungi. Fungal Genet Biol 2019; 132:103253. [PMID: 31325489 DOI: 10.1016/j.fgb.2019.103253] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 07/12/2019] [Accepted: 07/15/2019] [Indexed: 12/30/2022]
Abstract
The emergence of drug-resistant fungi poses a continuously increasing threat to human health. Despite advances in preventive care and diagnostics, resistant fungi continue to cause significant mortality, especially in immunocompromised patients. Therapeutic resources are further limited by current usage of only four major classes of antifungal drugs. Resistance against these drugs has already been observed in pathogenic fungi requiring the development of much needed newer antifungal drugs. Epigenetic changes such as DNA or chromatin modifications alter gene expression levels in response to certain stimuli, including interaction with the host in the case of fungal pathogens. These changes can confer resistance to drugs by altering the expression of target genes or genes encoding drug efflux pumps. Multiple pathogens share many of these epigenetic pathways; thus, targeting epigenetic pathways might also identify drug target candidates for the development of broad-spectrum antifungal drugs. In this review, we discuss the importance of epigenetic pathways in mediating drug resistance in fungi as well as in the development of anti-fungal drugs.
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Affiliation(s)
- Zanetta Chang
- Department of Molecular Genetics and Microbiology, Duke University, Duke University Medical Center, Durham, NC 27710, USA
| | - Vikas Yadav
- Department of Molecular Genetics and Microbiology, Duke University, Duke University Medical Center, Durham, NC 27710, USA
| | - Soo Chan Lee
- South Texas Center for Emerging Infectious Diseases (STCEID), Department of Biology, University of Texas at San Antonio, San Antonio, TX 78249, USA
| | - Joseph Heitman
- Department of Molecular Genetics and Microbiology, Duke University, Duke University Medical Center, Durham, NC 27710, USA.
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50
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Li X, Yuan M, Yin R, Liu X, Zhang Y, Sun S, Han L, He S. Histone deacetylase inhibitor attenuates experimental fungal keratitis in mice. Sci Rep 2019; 9:9859. [PMID: 31285488 PMCID: PMC6614500 DOI: 10.1038/s41598-019-46361-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 06/25/2019] [Indexed: 12/16/2022] Open
Abstract
Fungal keratitis is one of the leading causes of blindness of infected corneal diseases, but the pathogenesis of fungal keratitis is not fully understood and therefore the treatment of the disease by medication is still under investigation. In the current study, we sought to study the effect of HDAC inhibitor suberoylanilide hydroxamic acid (SAHA) on experimental fungal keratitis in mice. SAHA (25 mg/kg) (n = 30) or vehicle (DMSO) (n = 30) was delivered through intraperitoneal injection (IP) 24 hours after the fungal inoculation, and the same amount of SAHA injection or DMSO was followed at day 2. The expression of histone H3 (H3), acetylated histone H3 (AC-H3), histone deacetylase 1 (HDAC)1, tumor necrosis factor-α (TNFα), and Toll-like receptor 4 (TLR4) in surgically excised specimens from the patients and mice with fungal keratitis were detected by immunohistochemistry. The expression of mRNAs for Interleukin-1β (IL-1β), TNFα, and TLR4 were evaluated in the corneas of the mice with fungal infection and the control corneas by real-time PCR. The quantification of IL-1β and TNFα in the corneas of the mice with fungal infection was determined by ELISA. The inhibitory effect of SAHA on mice fungal keratitis was revealed by GMS and H&E staining. We found that the downregulation of histone acetylation and upregulation of HDAC1 expression were associated with the increased inflammation response in fungal keratitis not only in humans but also in experimental animals. SAHA was able to inhibit experimental fungal keratitis in mouse by suppressing TLR4 and inflammatory cytokines such as TNFα and IL-1β; the inhibition of HDAC may be a potential therapeutic approach for the treatment of fungal keratitis.
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Affiliation(s)
- Xiaohua Li
- Henan Provincial People's Hospital, Zhengzhou, 450003, China. .,Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, Zhengzhou, 450003, China. .,People's Hospital of Zhengzhou University, Zhengzhou, 450003, China. .,People's Hospital of Henan University, Zhengzhou, 450003, China.
| | - Min Yuan
- Henan Provincial People's Hospital, Zhengzhou, 450003, China.,Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, Zhengzhou, 450003, China.,People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.,People's Hospital of Henan University, Zhengzhou, 450003, China
| | - Ruijie Yin
- Henan Provincial People's Hospital, Zhengzhou, 450003, China.,Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, Zhengzhou, 450003, China.,People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.,People's Hospital of Henan University, Zhengzhou, 450003, China
| | - Xiaohui Liu
- Henan Provincial People's Hospital, Zhengzhou, 450003, China.,Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, Zhengzhou, 450003, China.,People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.,People's Hospital of Henan University, Zhengzhou, 450003, China
| | - Yu Zhang
- Henan Provincial People's Hospital, Zhengzhou, 450003, China.,Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, Zhengzhou, 450003, China.,People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.,People's Hospital of Henan University, Zhengzhou, 450003, China
| | - Shengtao Sun
- Henan Provincial People's Hospital, Zhengzhou, 450003, China.,Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, Zhengzhou, 450003, China.,People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.,People's Hospital of Henan University, Zhengzhou, 450003, China
| | - Lei Han
- Henan Provincial People's Hospital, Zhengzhou, 450003, China.,Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, Zhengzhou, 450003, China.,People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.,People's Hospital of Henan University, Zhengzhou, 450003, China
| | - Shikun He
- Departments of Pathology and Ophthalmology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
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