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Shepherd RA, Earp CE, Cank KB, Raja HA, Burdette J, Maher SP, Marin AA, Ruberto AA, Mai SL, Darveaux BA, Kyle DE, Pearce CJ, Oberlies NH. Sheptide A: an antimalarial cyclic pentapeptide from a fungal strain in the Herpotrichiellaceae. J Antibiot (Tokyo) 2023; 76:642-649. [PMID: 37731043 PMCID: PMC10602849 DOI: 10.1038/s41429-023-00655-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 08/28/2023] [Accepted: 09/01/2023] [Indexed: 09/22/2023]
Abstract
As part of ongoing efforts to isolate biologically active fungal metabolites, a cyclic pentapeptide, sheptide A (1), was discovered from strain MSX53339 (Herpotrichiellaceae). The structure and sequence of 1 were determined primarily by analysis of 2D NMR and HRMS/MS data, while the absolute configuration was assigned using a modified version of Marfey's method. In an in vitro assay for antimalarial potency, 1 displayed a pEC50 value of 5.75 ± 0.49 against malaria-causing Plasmodium falciparum. Compound 1 was also tested in a counter screen for general cytotoxicity against human hepatocellular carcinoma (HepG2), yielding a pCC50 value of 5.01 ± 0.45 and indicating a selectivity factor of ~6. This makes 1 the third known cyclic pentapeptide biosynthesized by fungi with antimalarial activity.
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Affiliation(s)
- Robert A Shepherd
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Cody E Earp
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Kristof B Cank
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Huzefa A Raja
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Joanna Burdette
- Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL, USA
| | - Steven P Maher
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | - Adriana A Marin
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | - Anthony A Ruberto
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | - Sarah Lee Mai
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | | | - Dennis E Kyle
- Center for Tropical & Emerging Global Diseases, University of Georgia, Athens, GA, USA
| | | | - Nicholas H Oberlies
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA.
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Healthy collaborations are needed for mangrove land use and mosquito control. ASIAN BIOMED 2022; 16:109-110. [PMID: 37551379 PMCID: PMC10321175 DOI: 10.2478/abm-2022-0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Asian Biomedicine
- Faculty of Medicine, Chulalongkorn University, Bangkok10330, Thailand
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Yu X, Chen X, Wang Z. Characterizing the Personalized Microbiota Dynamics for Disease Classification by Individual-Specific Edge-Network Analysis. Front Genet 2019; 10:283. [PMID: 31031795 PMCID: PMC6470192 DOI: 10.3389/fgene.2019.00283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 03/15/2019] [Indexed: 12/24/2022] Open
Abstract
Environmental factors such as the gut microbiome are thought to play an important role in the development and treatment of many diseases. But our understanding of microbiota compositional dynamics is still unclear and incomplete because the intestinal microbial community is an easily-changed ecosystem. It is urgently required to understand the large variations among individuals. These variations, however, will be an asset rather than a limitation to personalized medicine. For a proof-of-concept study on individual-specific disease classification based on microbiota compositional dynamics, we implemented an adjusted individual-specific edge-network analysis (iENA) method to address a limited number of samples from one individual, and compared it to the temporal 16S rRNA (ribosomal RNA) gene sequencing data from individuals in a challenge study. Our identified individual-specific OTU markers or their combined markers are consistent with previously reported markers, and the predictive score based on them can perform a better AUROC than the previous 0.83 and achieve about 90% accuracy on predicting whether an individual developed diarrhea [i.e., were symptomatic (Sx)] or not. In addition, iENA also showed satisfactory efficiency on another dataset about bacterial vaginosis (BV). All these results suggest that the combination of high-throughput microbiome experiments and computational systems biology approaches can efficiently recommend potential candidate species in the defense against various pathogens for precision medicine.
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Affiliation(s)
- Xiangtian Yu
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiaoyu Chen
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Zhenjia Wang
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA, United States
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Demers DH, Knestrick MA, Fleeman R, Tawfik R, Azhari A, Souza A, Vesely B, Netherton M, Gupta R, Colon BL, Rice CA, Rodríguez-Pérez MA, Rohde KH, Kyle DE, Shaw LN, Baker BJ. Exploitation of Mangrove Endophytic Fungi for Infectious Disease Drug Discovery. Mar Drugs 2018; 16:E376. [PMID: 30308948 DOI: 10.3390/md16100376] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/03/2018] [Accepted: 10/05/2018] [Indexed: 01/14/2023] Open
Abstract
There is an acute need for new and effective agents to treat infectious diseases. We conducted a screening program to assess the potential of mangrove-derived endophytic fungi as a source of new antibiotics. Fungi cultured in the presence and absence of small molecule epigenetic modulators were screened against Mycobacterium tuberculosis and the ESKAPE panel of bacterial pathogens, as well as two eukaryotic infective agents, Leishmania donovani and Naegleria fowleri. By comparison of bioactivity data among treatments and targets, trends became evident, such as the result that more than 60% of active extracts were revealed to be selective to a single target. Validating the technique of using small molecules to dysregulate secondary metabolite production pathways, nearly half (44%) of those fungi producing active extracts only did so following histone deacetylase inhibitory (HDACi) or DNA methyltransferase inhibitory (DNMTi) treatment.
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