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Bemis CY, Ungarean CN, Shved AS, Jamieson CS, Hwang T, Lee KS, Houk KN, Sarlah D. Total Synthesis and Computational Investigations of Sesquiterpene-Tropolones Ameliorate Stereochemical Inconsistencies and Resolve an Ambiguous Biosynthetic Relationship. J Am Chem Soc 2021; 143:6006-6017. [DOI: 10.1021/jacs.1c02150] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Christopher Y. Bemis
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Chad N. Ungarean
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Alexander S. Shved
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Cooper S. Jamieson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Taehwan Hwang
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Ken S. Lee
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
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Liu Y, Wang Q, Wang Y, Song H, Zhou Z. Chiral Bifunctional Squaramide-Catalyzed Highly Enantioselective Michael Addition of Allomaltol to β,γ-Unsaturated α-Ketoesters. ChemCatChem 2014. [DOI: 10.1002/cctc.201402168] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Chen YH, Lu PJ, Hulme C, Shaw AY. Synthesis of (E)-5-Methoxy-2-styryl-4-pyrones as Potent Growth-Inhibitory Agents Against Hepatocellular Carcinoma Cells. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yu-Hua Chen
- Department of Chemistry; Tamkang University; New Taipei City 251 Taiwan
| | - Pei-Jung Lu
- Institute of Clinical Medicine; National Cheng Kung University; Tainan 701 Taiwan
| | - Christopher Hulme
- Department of Pharmacology and Toxicology, College of Pharmacy; The University of Arizona; Tucson AZ 85737 USA
- BIO5 Oro Valley; The University of Arizona; Oro Valley AZ 85737 USA
| | - Arthur Y. Shaw
- Department of Pharmacology and Toxicology, College of Pharmacy; The University of Arizona; Tucson AZ 85737 USA
- BIO5 Oro Valley; The University of Arizona; Oro Valley AZ 85737 USA
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Li Y, Sun M, Gao W. Synthesis and characterization of bromo-, arylazo-, and heterocyclic-fused troponoids containing a 1,3-benzodioxole system. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.702] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Duncan C, Flitsch S, Asefa T. Aminotroponiminate-Zinc Complex-Functionalized Mesoporous Materials: Efficient and Recyclable Intramolecular Hydroamination Catalysts. ChemCatChem 2009. [DOI: 10.1002/cctc.200900114] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Fickova M, Pravdova E, Rondhal L, Uher M, Brtko J. In vitro antiproliferative and cytotoxic activities of novel kojic acid derivatives: 5-benzyloxy-2-selenocyanatomethyl- and 5-methoxy-2-selenocyanatomethyl-4-pyranone. J Appl Toxicol 2008; 28:554-9. [DOI: 10.1002/jat.1300] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
Kojic acid is a fungal metabolite commonly produced by many species of Aspergillus, Acetobacter, and Penicillium. The Aspergillus flavus group has traditionally been used in the production of a number of foods, including miso (soybean paste), shoyu (soy sauce), and sake. Kojic acid is widely used as a food additive for preventing enzymatic browning, and in cosmetic preparations as a skin-lightening or bleaching agent. Because kojic acid is often produced during the fermentation of historically used dietary staples, it has a long history of consumption. Various types of compounds, such as glucose, sucrose, acetate, ethanol, arabinose, and xylose, have been used as carbon sources for kojic acid production. Different Aspergillus species are known to produce variable amounts of kojic acid. The mechanism of action of kojic acid is well defined and it has been shown to act as a competitive and reversible inhibitor of animal and plant polyphenol oxidases, xanthine oxidase, and D- and some L-amino acid oxidases. The structure of kojic acid indicates a relatively simple route of metabolism much like dietary hexoses. Acute or subchronic toxicity resulting from an oral dose has not been reported, but convulsions may occur if kojic acid is injected. Results of mutagenicity studies are mixed, but in the in vivo mammalian dominant lethal assay, kojic acid was proven negative. Continuous administration of high doses of kojic acid in mice resulted in induction of thyroid adenomas in both sexes. Kojic acid reversibly affects thyroid function primarily by inhibiting iodine uptake, leading to decreases in T3 and T4 and increase in TSH. Increased TSH from pituitary gland in turn stimulates thyroid hyperplasia. Several lines of evidence indicate that the proliferative effects of kojic acid on thyroid are not related to a genotoxic pathway. The risk of functional inhibition of iodine uptake and its metabolism (organification) and thyroid tumor induction by kojic acid in humans appears to be extremely low. Based on the literature reviewed and discussed here, consumption of kojic acid at levels normally found in food does not present a concern for safety.
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Affiliation(s)
- G A Burdock
- Burdock and Associates, Inc., 622 Beachland Boulevard, Vero Beach, Florida 32963, USA.
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Nordenberg J, Novogrodsky A, Beery E, Patia M, Wasserman L, Warshawsky A. Anti-proliferative effects and phenotypic alterations induced by 8-hydroxyquinoline in melanoma cell lines. Eur J Cancer 1990; 26:905-7. [PMID: 2145937 DOI: 10.1016/0277-5379(90)90197-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The effect of the transition metal chelator, 8-hydroxyquinoline (8-HQ), was examined on the growth and phenotype expression of B16 mouse melanoma cells. Micromolar concentrations of 8-HQ inhibited the growth of B16 cells as well as human melanoma cell lines. Removal of 8-HQ from the culture medium restored normal cell growth. Growth inhibition by 8-HQ was accompanied by phenotypic alterations that included changes in cell morphology, increased production of melanin and enhanced activities of the enzymes gamma-glutamyl transpeptidase and NADPH cytochrome c reductase. These changes might be associated with a better differentiated phenotype.
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Affiliation(s)
- J Nordenberg
- Rogoff Research Institute, Beilinson Medical Center, Petah Tikva, Israel
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Saleh NA, Zwiefak A, Mordarski M, Pulverer G. Antibacterial activity of selected tropones and tropolones. ZENTRALBLATT FUR BAKTERIOLOGIE, MIKROBIOLOGIE, UND HYGIENE. SERIES A, MEDICAL MICROBIOLOGY, INFECTIOUS DISEASES, VIROLOGY, PARASITOLOGY 1988; 270:160-70. [PMID: 3223137 DOI: 10.1016/s0176-6724(88)80153-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The antibacterial activity of 33 substituted and unsubstituted seven-member ring tropones and tropolones was examined on 14 reference strains representing Gram-positive and Gram-negative bacteria. It was shown that the chemical character and position of the substituent plays a distinct role in the biological activity of investigated compounds. Depending on the substituent the antibacterial effect may be either increased or diminished. C-1 thio and C-2 nitro derivatives of tropone are significantly more active than tropone. The dibenzotropone derivatives display no antibacterial activity. Hydroxymethyl derivatives of tropolone are more active than tropolone, while hydroxy-, isopropyl-, methyl- as well as tropolone acetates are equipotent.
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Affiliation(s)
- N A Saleh
- Department of Microbiology, Polish Academy of Sciences, Wroclaw
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