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Wang HL, Li R, Zhao M, Wang ZY, Tang H, Cao ZY, Zheng GL, Zhang W. A Drimane Meroterpenoid Borate as a Synchronous Ca + Oscillation Inhibitor from the Coral-Associated Fungus Alternaria sp. ZH-15. JOURNAL OF NATURAL PRODUCTS 2023; 86:429-433. [PMID: 36729068 DOI: 10.1021/acs.jnatprod.2c01028] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Territrem F (1), a drimane meroterpenoid bearing a unique borate ring system, was isolated together with its diol precursor territrem B (2) from the fungus Alternaria sp. ZH-15 associated with the soft coral Lobophytum crassum collected in the South China Sea. The structure of the new compound was elucidated by spectroscopic analysis and an X-ray single-crystal diffraction study, representing a new type of boron-containing natural product. Both compounds significantly inhibited spontaneous synchronous Ca2+ oscillations (SCOs) and epileptic discharges induced by 4-aminopyridine, showing the potential for antiepileptic drug research. The 5,9-boronic ester derivative of 2 did not change its SCO inhibitory activity.
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Affiliation(s)
- Hong-Liang Wang
- School of Pharmacy, Navy Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
| | - Ran Li
- School of Pharmacy, Navy Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
| | - Min Zhao
- Tongji University School of Medicine, 1239 Si-Ping Road, Shanghai 200092, People's Republic of China
| | - Zeng-Yiyi Wang
- Tongji University School of Medicine, 1239 Si-Ping Road, Shanghai 200092, People's Republic of China
| | - Hua Tang
- Institute of Translational Medicine, Shanghai University, 99 Shang-Da Road, Shanghai 200444, People's Republic of China
| | - Zheng-Yu Cao
- State Key Laboratory of Natural Medicines and Department of TCM Pharmacology, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Zhong-Yang Road, Nanjing 211198, People's Republic of China
| | - Gui-Liang Zheng
- Department of Otorhinolaryngology, Head and Neck Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kong-Jiang Road, Shanghai 200092, People's Republic of China
| | - Wen Zhang
- School of Pharmacy, Navy Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
- Tongji University School of Medicine, 1239 Si-Ping Road, Shanghai 200092, People's Republic of China
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2
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Ikeda H, Kakeya H. Targeting hypoxia-inducible factor 1 (HIF-1) signaling with natural products toward cancer chemotherapy. J Antibiot (Tokyo) 2021; 74:687-695. [PMID: 34331027 DOI: 10.1038/s41429-021-00451-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 05/29/2021] [Accepted: 06/04/2021] [Indexed: 02/06/2023]
Abstract
Tumor cells are often exposed to hypoxia because of the lower oxygen supply deep inside the tumor tissues. However, tumor cells survive in these severe conditions by adapting to hypoxic stress through the induction of hypoxia-inducible factor 1 (HIF-1) signaling. HIF-1 activation is responsible for the expression of numerous HIF-1 target genes, which are related to cell survival, proliferation, angiogenesis, invasion, metastasis, cancer stemness, and metabolic reprogramming. Therefore, HIF-1 is expected to be a potential pharmacological target for cancer therapy. Small molecules derived from natural products (microbial origin, plant-derived, or marine organisms) have been shown to have unique chemical structures and biological activities, including HIF-1 inhibition. Several studies identified HIF-1 inhibitors from natural products. In this review, we summarize the current HIF-1 signaling inhibitors originating from natural products with a variety of modes of action, mainly focusing on microbial metabolites.
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Affiliation(s)
- Hiroaki Ikeda
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hideaki Kakeya
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.
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O’Connor RM, Nepveux V FJ, Abenoja J, Bowden G, Reis P, Beaushaw J, Bone Relat RM, Driskell I, Gimenez F, Riggs MW, Schaefer DA, Schmidt EW, Lin Z, Distel DL, Clardy J, Ramadhar TR, Allred DR, Fritz HM, Rathod P, Chery L, White J. A symbiotic bacterium of shipworms produces a compound with broad spectrum anti-apicomplexan activity. PLoS Pathog 2020; 16:e1008600. [PMID: 32453775 PMCID: PMC7274485 DOI: 10.1371/journal.ppat.1008600] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 06/05/2020] [Accepted: 05/05/2020] [Indexed: 12/13/2022] Open
Abstract
Apicomplexan parasites cause severe disease in both humans and their domesticated animals. Since these parasites readily develop drug resistance, development of new, effective drugs to treat infection caused by these parasites is an ongoing challenge for the medical and veterinary communities. We hypothesized that invertebrate-bacterial symbioses might be a rich source of anti-apicomplexan compounds because invertebrates are susceptible to infections with gregarines, parasites that are ancestral to all apicomplexans. We chose to explore the therapeutic potential of shipworm symbiotic bacteria as they are bona fide symbionts, are easily grown in axenic culture and have genomes rich in secondary metabolite loci [1,2]. Two strains of the shipworm symbiotic bacterium, Teredinibacter turnerae, were screened for activity against Toxoplasma gondii and one strain, T7901, exhibited activity against intracellular stages of the parasite. Bioassay-guided fractionation identified tartrolon E (trtE) as the source of the activity. TrtE has an EC50 of 3 nM against T. gondii, acts directly on the parasite itself and kills the parasites after two hours of treatment. TrtE exhibits nanomolar to picomolar level activity against Cryptosporidium, Plasmodium, Babesia, Theileria, and Sarcocystis; parasites representing all branches of the apicomplexan phylogenetic tree. The compound also proved effective against Cryptosporidium parvum infection in neonatal mice, indicating that trtE may be a potential lead compound for preclinical development. Identification of a promising new compound after such limited screening strongly encourages further mining of invertebrate symbionts for new anti-parasitic therapeutics.
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Affiliation(s)
- Roberta M. O’Connor
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
- * E-mail:
| | - Felix J. Nepveux V
- Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Jaypee Abenoja
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Gregory Bowden
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Patricia Reis
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Josiah Beaushaw
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Rachel M. Bone Relat
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Iwona Driskell
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Fernanda Gimenez
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Michael W. Riggs
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Deborah A. Schaefer
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Eric W. Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Zhenjian Lin
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Daniel L. Distel
- Ocean Genome Legacy Center, Northeastern University, Nahant, Massachusetts, United States of America
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Cambridge, Massachusetts, United States of America
| | - Timothy R. Ramadhar
- Department of Chemistry, Howard University, Washington DC, United States of America
| | - David R. Allred
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
| | - Heather M. Fritz
- California Animal Health and Food Safety Lab, University of California, Davis, California, United States of America
| | - Pradipsinh Rathod
- Department of Chemistry, University of Washington, Seattle, Washington, United States of America
| | - Laura Chery
- Department of Chemistry, University of Washington, Seattle, Washington, United States of America
| | - John White
- Department of Chemistry, University of Washington, Seattle, Washington, United States of America
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Pérez M, Crespo C, Schleissner C, Rodríguez P, Zúñiga P, Reyes F. Tartrolon D, a cytotoxic macrodiolide from the marine-derived actinomycete Streptomyces sp. MDG-04-17-069. JOURNAL OF NATURAL PRODUCTS 2009; 72:2192-2194. [PMID: 19968258 DOI: 10.1021/np9006603] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Exploration of marine-derived actinomycetes as a source of antitumor compounds has led to the isolation of a new member of the tartrolon series, tartrolon D (4). This new compound was obtained from Streptomyces sp. MDG-04-17-069 fermentation broths and displayed strong cytotoxic activity against three human tumor cell lines. Additionally, the known compound ikarugamycin (5) was also found in the culture broths of the same microorganism. The structure of this new tartrolon was established by a combination of spectroscopic techniques (1D and 2D NMR, HRMS, and UV) as well as by comparison with published data for similar compounds.
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Affiliation(s)
- Marta Pérez
- Medicinal Chemistry and Microbiology Departments, PharmaMar S.A., Pol. Ind. La Mina Norte, Avenida de los Reyes 1, 28770-Colmenar Viejo (Madrid), Spain
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Abstract
Hypoxia is a common feature of many solid tumors and contributes to their progression. Hypoxic cells in the tumor are not only involved in therapeutic resistance to chemotherapy and radiotherapy but are also relevant to tumor angiogenesis. To identify novel hypoxia-selective cytotoxins, we screened 20000 cultured broths of microorganisms and found that rakicidin A showed significant hypoxia-selective cytotoxicity. Rakicidin A was approximately 17.5-fold more cytotoxic under hypoxic than under normoxic conditions. CoCl2 and antioxidants had no effect on the rakicidin A cytotoxicity under normoxic conditions and rakicidin A did not show the inhibitory effects on HIF-1 transcriptional activity under hypoxic conditions. Thus, although the action mechanism of the hypoxia-selective cytotoxicity of rakicidin A was unknown, our screening study suggested that rakicidin A acts as an antitumor agent for selective therapy against solid tumors.
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Affiliation(s)
- Yohko Yamazaki
- Numazu Bio-Medical Research Institute, Microbial Chemistry Research Center, Shizuoka, Japan.
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