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Choi J, Kim M, Choi J, Jang M, Hyun S. Sorption behavior of three aromatic acids (benzoic acid, 1-naphthoic acid and 9-anthroic acid) on biochar: Cosolvent effect in different liquid phases. Chemosphere 2024; 349:140898. [PMID: 38070610 DOI: 10.1016/j.chemosphere.2023.140898] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 09/12/2023] [Accepted: 12/03/2023] [Indexed: 01/10/2024]
Abstract
Influence of the cosolvent on the sorption of organic acids on biochar has not been well understood. For this purpose, the sorption (log Km, L kg-1) of three aromatic acids (benzoic acid (BA, pKa = 4.20), 1-naphthoic acid (1-NAPA, pKa = 3.70), and 9-anthroic acid (9-ANTA, pKa = 3.65) was evaluated as a function of methanol volume fraction (fc = 0.0, 0.25, and 0.5), liquid pH (2.5 and 7.0), ionic composition (CaCl2 and KCl) and ionic strength (0.005 M, 0.5 M, and 1 M CaCl2). A giant Miscanthus-derived biochar (ZPC of 2.86) was used as the sorbent. For all solutes, the sorption coefficients (log Km) measured at pH 2.5 (i.e., pH < pKa) tended to decrease with increasing fc, as expected from the cosolvency model, while the result obtained at pH 7.0 was not fully explained by the same model. The log Km of 1-NAPA in the CaCl2 system was always greater than in the KCl system (p < 0.05) and the impact became pronounced at high pH (>pKa) with increasing fc. Increasing the Ca2+ concentration at fc = 0.0 (from 0.005 M to 1 M) enhanced the value by 0.32 log unit of Km. These phenomena indicate a significant role of dissolved Ca2+ in the liquid phase, most likely due to the formation of cation bridges between aromatic carboxylates and the biochar surface (i.e., [R-COO--Ca2+]-{Biochar-}). A decrease in the dielectric constant of the methanol mixture could fortify the formation of this bridge. Regardless of the degree of cosolvency power (σ), as the number of aromatic rings of solutes increases, Km decreases in the order BA > 1-NAPA > 9-ANTA, where fc = 0.0. In conclusion, the sorption potential of biochar can be significantly weakened by increasing pH and fc, and in the absence of a divalent cation.
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Affiliation(s)
- Jeongmin Choi
- Department of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea; FITI Testing & Research Institute, Seoul, 07791, Republic of Korea
| | - Minhee Kim
- Ministry of Environment, Hanam-si, Gyeonggi-do, 12902, Republic of Korea
| | - Jongwoo Choi
- National Institute of Environmental Research, Incheon, 22689, Republic of Korea
| | - Min Jang
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea
| | - Seunghun Hyun
- Department of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
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2
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Regueiro-Ren A, Sit SY, Chen Y, Chen J, Swidorski JJ, Liu Z, Venables BL, Sin N, Hartz RA, Protack T, Lin Z, Zhang S, Li Z, Wu DR, Li P, Kempson J, Hou X, Gupta A, Rampulla R, Mathur A, Park H, Sarjeant A, Benitex Y, Rahematpura S, Parker D, Phillips T, Haskell R, Jenkins S, Santone KS, Cockett M, Hanumegowda U, Dicker I, Meanwell NA, Krystal M. The Discovery of GSK3640254, a Next-Generation Inhibitor of HIV-1 Maturation. J Med Chem 2022; 65:11927-11948. [PMID: 36044257 DOI: 10.1021/acs.jmedchem.2c00879] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
GSK3640254 is an HIV-1 maturation inhibitor (MI) that exhibits significantly improved antiviral activity toward a range of clinically relevant polymorphic variants with reduced sensitivity toward the second-generation MI GSK3532795 (BMS-955176). The key structural difference between GSK3640254 and its predecessor is the replacement of the para-substituted benzoic acid moiety attached at the C-3 position of the triterpenoid core with a cyclohex-3-ene-1-carboxylic acid substituted with a CH2F moiety at the carbon atom α- to the pharmacophoric carboxylic acid. This structural element provided a new vector with which to explore structure-activity relationships (SARs) and led to compounds with improved polymorphic coverage while preserving pharmacokinetic (PK) properties. The approach to the design of GSK3640254, the development of a synthetic route and its preclinical profile are discussed. GSK3640254 is currently in phase IIb clinical trials after demonstrating a dose-related reduction in HIV-1 viral load over 7-10 days of dosing to HIV-1-infected subjects.
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Affiliation(s)
- Alicia Regueiro-Ren
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, Princeton, New Jersey08543, United States
| | - Sing-Yuen Sit
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Yan Chen
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Jie Chen
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Jacob J Swidorski
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Zheng Liu
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Brian L Venables
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Ny Sin
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Richard A Hartz
- Department of Discovery Chemistry, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Tricia Protack
- Department of Virology, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Zeyu Lin
- Department of Virology, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Sharon Zhang
- Department of Virology, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Zhufang Li
- Department of Virology, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Dauh-Rurng Wu
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, New Jersey08543, United States
| | - Peng Li
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, New Jersey08543, United States
| | - James Kempson
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, New Jersey08543, United States
| | - Xiaoping Hou
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, New Jersey08543, United States
| | - Anuradha Gupta
- Department of Discovery Synthesis; Bristol Myers Squibb Research and Early Development, Bangalore 560099, India
| | - Richard Rampulla
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, New Jersey08543, United States
| | - Arvind Mathur
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, New Jersey08543, United States
| | - Hyunsoo Park
- Bristol Myers Squibb Chemical and Synthetic Development, New Brunswick, New Jersey08901, United States
| | - Amy Sarjeant
- Bristol Myers Squibb Chemical and Synthetic Development, New Brunswick, New Jersey08901, United States
| | - Yulia Benitex
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Sandhya Rahematpura
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Dawn Parker
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Thomas Phillips
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Roy Haskell
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Susan Jenkins
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Kenneth S Santone
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Mark Cockett
- Department of Virology, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Umesh Hanumegowda
- Department of Pharmaceutical Candidate Optimization, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Ira Dicker
- Department of Virology, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
| | - Nicholas A Meanwell
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, Princeton, New Jersey08543, United States
| | - Mark Krystal
- Department of Virology, Bristol Myers Squibb Research and Early Development, 5 Research Parkway, Wallingford, Connecticut06492, United States
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Wang W, Li C, Chen Z, Zhang J, Ma L, Tian Y, Ma Y, Guo L, Wang X, Ye J, Wang X. Novel diosgenin-amino acid-benzoic acid mustard trihybrids exert antitumor effects via cell cycle arrest and apoptosis. J Steroid Biochem Mol Biol 2022; 216:106038. [PMID: 34861390 DOI: 10.1016/j.jsbmb.2021.106038] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 11/16/2021] [Accepted: 11/29/2021] [Indexed: 12/14/2022]
Abstract
In discovering new powerful antitumor agents, two series of novel diosgenin-amino acid-benzoic acid mustard trihybrids (7a-7 g and 12a-12 g) were designed and synthesized. The antiproliferative activities were tested against five human tumor cell lines and one normal cell line using CCK-8 assays. Among the trihybrids, 12e was the most promising compound, which inhibited T24 cells with IC50 value of 6.96 μM, and was stronger than its parent compound diosgenin (IC50 = 32.33 μM). In addition, 12e had weak cytotoxicity on the normal GES-1 cell line (IC50 = 213.74 μM). Moreover, 12e could cause G2/M cell cycle arrest, increase the percentage of apoptosis, induce mitochondrial depolarization, and promote reactive oxygen species generation in T24 cells. Further studies on antitumor mechanism demonstrated that 12e triggered the intrinsic (mitochondrial) and extrinsic (death receptor) apoptotic pathways. More importantly, 12e could inhibit T24 cell proliferation in an in vivo zebrafish xenograft model. Therefore, 12e, as a novel trihybrid with potent cytotoxicity, might be applied as a promising skeleton for antitumor agents, which deserved further optimization.
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Affiliation(s)
- Wenbao Wang
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China; Chinese People's Liberation Army Logistics Support Force No. 967 Hospital, Dalian, 116021, PR China.
| | - Chuan Li
- General Hospital of Northern Theater Command, Shenyang, 110016, PR China
| | - Zhe Chen
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China
| | - Jinling Zhang
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China
| | - Liwei Ma
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China
| | - Yanzhao Tian
- Chinese People's Liberation Army Logistics Support Force No. 967 Hospital, Dalian, 116021, PR China
| | - Yukun Ma
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China
| | - Lina Guo
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China
| | - Xiaoli Wang
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China
| | - Jin Ye
- Qiqihar Medical University, Qiqihar, 161006 Heilongjiang, PR China
| | - Xiaobo Wang
- Chinese People's Liberation Army Logistics Support Force No. 967 Hospital, Dalian, 116021, PR China.
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Apostol TV, Chifiriuc MC, Draghici C, Socea LI, Marutescu LG, Olaru OT, Nitulescu GM, Pahontu EM, Saramet G, Barbuceanu SF. Synthesis, In Silico and In Vitro Evaluation of Antimicrobial and Toxicity Features of New 4-[(4-Chlorophenyl)sulfonyl]benzoic Acid Derivatives. Molecules 2021; 26:molecules26165107. [PMID: 34443693 PMCID: PMC8399259 DOI: 10.3390/molecules26165107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 11/16/2022] Open
Abstract
The multi-step synthesis, physico-chemical characterization, and biological activity of novel valine-derived compounds, i.e., N-acyl-α-amino acids, 1,3-oxazol-5(4H)-ones, N-acyl-α-amino ketones, and 1,3-oxazoles derivatives, bearing a 4-[(4-chlorophenyl)sulfonyl]phenyl moiety are reported here. The structures of the newly synthesized compounds were confirmed by spectral (UV-Vis, FT-IR, MS, 1H- and 13C-NMR) data and elemental analysis results, and their purity was determined by RP-HPLC. The new compounds were assessed for their antimicrobial activity and toxicity to aquatic crustacean Daphnia magna. Also, in silico studies regarding their potential mechanism of action and toxicity were performed. The antimicrobial evaluation revealed that the 2-{4-[(4-chlorophenyl)sulfonyl]benzamido}-3-methylbutanoic acid and the corresponding 1,3-oxazol-5(4H)-one exhibited antimicrobial activity against Gram-positive bacterial strains and the new 1,3-oxazole containing a phenyl group at 5-position against the C. albicans strain.
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Affiliation(s)
- Theodora-Venera Apostol
- Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania; (T.-V.A.); (L.-I.S.); (G.M.N.); (E.M.P.); (G.S.); (S.-F.B.)
| | - Mariana Carmen Chifiriuc
- Department of Botany and Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor, 60101 Bucharest, Romania;
| | - Constantin Draghici
- “Costin D. Nenițescu” Centre of Organic Chemistry, Romanian Academy, 202 B Splaiul Independenței, 060023 Bucharest, Romania;
| | - Laura-Ileana Socea
- Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania; (T.-V.A.); (L.-I.S.); (G.M.N.); (E.M.P.); (G.S.); (S.-F.B.)
| | - Luminita Gabriela Marutescu
- Department of Botany and Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor, 60101 Bucharest, Romania;
- Correspondence: (L.G.M.); (O.T.O.)
| | - Octavian Tudorel Olaru
- Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania; (T.-V.A.); (L.-I.S.); (G.M.N.); (E.M.P.); (G.S.); (S.-F.B.)
- Correspondence: (L.G.M.); (O.T.O.)
| | - George Mihai Nitulescu
- Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania; (T.-V.A.); (L.-I.S.); (G.M.N.); (E.M.P.); (G.S.); (S.-F.B.)
| | - Elena Mihaela Pahontu
- Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania; (T.-V.A.); (L.-I.S.); (G.M.N.); (E.M.P.); (G.S.); (S.-F.B.)
| | - Gabriel Saramet
- Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania; (T.-V.A.); (L.-I.S.); (G.M.N.); (E.M.P.); (G.S.); (S.-F.B.)
| | - Stefania-Felicia Barbuceanu
- Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania; (T.-V.A.); (L.-I.S.); (G.M.N.); (E.M.P.); (G.S.); (S.-F.B.)
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Chapagai D, Ramamoorthy G, Varghese J, Nurmemmedov E, McInnes C, Wyatt MD. Nonpeptidic, Polo-Box Domain-Targeted Inhibitors of PLK1 Block Kinase Activity, Induce Its Degradation and Target-Resistant Cells. J Med Chem 2021; 64:9916-9925. [PMID: 34210138 PMCID: PMC10451095 DOI: 10.1021/acs.jmedchem.1c00133] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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] [Indexed: 12/21/2022]
Abstract
PLK1, polo-like kinase 1, is a central player regulating mitosis. Inhibition of the subcellular localization and kinase activity of PLK1 through the PBD, polo-box domain, is a viable alternative to ATP-competitive inhibitors, for which the development of resistance and inhibition of related PLK family members are concerns. We describe novel nonpeptidic PBD-binding inhibitors, termed abbapolins, identified through successful application of the REPLACE strategy and demonstrate their potent antiproliferative activity in prostate tumors and other cell lines. Furthermore, abbapolins show PLK1-specific binding and inhibitory activity, as measured by a cellular thermal shift assay and an ability to block phosphorylation of TCTP, a validated target of PLK1-mediated kinase activity. Additional evidence for engagement of PLK1 was obtained through the unique observation that abbapolins induce PLK1 degradation in a manner that closely matches antiproliferative activity. Moreover, abbapolins demonstrate antiproliferative activity in cells that are dramatically resistant to ATP-competitive PLK1 inhibitors.
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Affiliation(s)
- Danda Chapagai
- Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Gurusankar Ramamoorthy
- Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Jessy Varghese
- Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Elmar Nurmemmedov
- John Wayne Cancer Institute and Pacific Neuroscience Institute at Providence Saint John's Health Center, Santa Monica, California 90404-2312, United States
| | - Campbell McInnes
- Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Michael D Wyatt
- Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, South Carolina 29208, United States
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Chitiva-Chitiva LC, Ladino-Vargas C, Cuca-Suárez LE, Prieto-Rodríguez JA, Patiño-Ladino OJ. Antifungal Activity of Chemical Constituents from Piper pesaresanum C. DC. and Derivatives against Phytopathogen Fungi of Cocoa. Molecules 2021; 26:molecules26113256. [PMID: 34071493 PMCID: PMC8198927 DOI: 10.3390/molecules26113256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 04/29/2021] [Accepted: 05/03/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, the antifungal potential of chemical constituents from Piper pesaresanum and some synthesized derivatives was determined against three phytopathogenic fungi associated with the cocoa crop. The methodology included the phytochemical study on the aerial part of P. pesaresanum, the synthesis of some derivatives and the evaluation of the antifungal activity against the fungi Moniliophthora roreri, Fusarium solani and Phytophthora sp. The chemical study allowed the isolation of three benzoic acid derivatives (1-3), one dihydrochalcone (4) and a mixture of sterols (5-7). Seven derivatives (8-14) were synthesized from the main constituents, of which compounds 9, 10, 12 and 14 are reported for the first time. Benzoic acid derivatives showed strong antifungal activity against M. roreri, of which 11 (3.0 ± 0.8 µM) was the most active compound with an IC50 lower compared with positive control Mancozeb® (4.9 ± 0.4 µM). Dihydrochalcones and acid derivatives were active against F. solani and Phytophthora sp., of which 3 (32.5 ± 3.3 µM) and 4 (26.7 ± 5.3 µM) were the most active compounds, respectively. The preliminary structure-activity relationship allowed us to establish that prenylated chains and the carboxyl group are important in the antifungal activity of benzoic acid derivatives. Likewise, a positive influence of the carbonyl group on the antifungal activity for dihydrochalcones was deduced.
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Affiliation(s)
- Luis C. Chitiva-Chitiva
- Department of Chemistry, Faculty of Sciences, Universidad Nacional de Colombia, Sede Bogotá, Bogotá 111321, Colombia; (L.C.C.-C.); (L.E.C.-S.)
| | - Cristóbal Ladino-Vargas
- Department of Chemistry, Faculty of Sciences, Pontificia Universidad Javeriana, Sede Bogotá, Bogotá 110231, Colombia; (C.L.-V.); (J.A.P.-R.)
| | - Luis E. Cuca-Suárez
- Department of Chemistry, Faculty of Sciences, Universidad Nacional de Colombia, Sede Bogotá, Bogotá 111321, Colombia; (L.C.C.-C.); (L.E.C.-S.)
| | - Juliet A. Prieto-Rodríguez
- Department of Chemistry, Faculty of Sciences, Pontificia Universidad Javeriana, Sede Bogotá, Bogotá 110231, Colombia; (C.L.-V.); (J.A.P.-R.)
| | - Oscar J. Patiño-Ladino
- Department of Chemistry, Faculty of Sciences, Universidad Nacional de Colombia, Sede Bogotá, Bogotá 111321, Colombia; (L.C.C.-C.); (L.E.C.-S.)
- Correspondence: ; Tel.: +57-1-3165000 (ext. 14485)
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Salleh WMNHW. A systematic review of botany, phytochemicals and pharmacological properties of " Hoja sant a" ( Piper auritum Kunth). Z NATURFORSCH C 2021; 76:93-102. [PMID: 32960783 DOI: 10.1515/znc-2020-0116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/03/2020] [Indexed: 11/15/2022]
Abstract
Hoja santa (Piper auritum) refers to an important presence in Mexican cuisine. The information of this review article was gathered from several electronic sources such as Scopus, Medline, Scielo, ScienceDirect, SciFinder, Web of Science, Google Scholar and Lilacs. Phytochemical studies have revealed the presence of benzoic acid derivatives, phenylpropanoids and triterpenoids, while the essential oils have shown its richness in safrole, hence it has several activities, such as antioxidant, toxicity, insecticidal, anti-diabetic and cytotoxic properties. This review is expected to draw the attention of medical professionals and the general public towards P. auritum as well as to open the door for detailed research in the future.
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Affiliation(s)
- Wan Mohd Nuzul Hakimi Wan Salleh
- Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris (UPSI), 35900Tanjung Malim, Perak, Malaysia
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Lu R, Wang Y, Liu C, Zhang Z, Li B, Meng Z, Jiang C, Hu Q. Design, synthesis and evaluation of 3-amide-5-aryl benzoic acid derivatives as novel P2Y 14R antagonists with potential high efficiency against acute gouty arthritis. Eur J Med Chem 2021; 216:113313. [PMID: 33667846 DOI: 10.1016/j.ejmech.2021.113313] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 02/01/2021] [Accepted: 02/14/2021] [Indexed: 01/26/2023]
Abstract
P2Y14 nucleotide receptor plays important roles in series of physiological and pathologic events especially associated with immune and inflammation. Based on the 3-amide benzoic acid scaffold reported by our group previously, a series of 5-aryl-3-amide benzoic acid derivatives were designed as novel P2Y14 antagonists with improved pharmacokinetic properties. Among which compound 11m showed most potent P2Y14 antagonizing activity with an IC50 value of 2.18 nM, furnishing greatly improved water solubility and bioavailability compared with PPTN. In MSU-induced acute gouty arthritis model in mice, 11m exerted promising in vivo efficacy in alleviating mice paw swelling and inflammatory infiltration. Mechanistically, compound 11m notably blocked pyroptosis of macrophages through inhibiting NLRP3 inflammasome activation. This work may contribute to the identification of potential therapeutic agents to intervene in acute gouty arthritis.
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Affiliation(s)
- Ran Lu
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China; Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, PR China
| | - Yilin Wang
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China
| | - Chunxiao Liu
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China
| | - Zhenguo Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing, 211816, PR China
| | - Baiyang Li
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China
| | - Zibo Meng
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China
| | - Cheng Jiang
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China; Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, PR China.
| | - Qinghua Hu
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, PR China.
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Hsu CW, Hsieh MH, Xiao MC, Chou YH, Wang TH, Chiang WH. pH-responsive polymeric micelles self-assembled from benzoic-imine-containing alkyl-modified PEGylated chitosan for delivery of amphiphilic drugs. Int J Biol Macromol 2020; 163:1106-1116. [PMID: 32679318 DOI: 10.1016/j.ijbiomac.2020.07.110] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/06/2020] [Accepted: 07/10/2020] [Indexed: 11/19/2022]
Abstract
In order to efficiently promote loading efficiency and aqueous photostability of indocyanine green (ICG), an amphiphilic tricarbocyanine dye, the polysaccharide-based nanomicelles utilized as a vehicle for ICG were fabricated by self-assembly of the amphiphilic benzoic-imine-containing PEGylated chitosan/4-(dodecyloxy)benzaldehyde (DBA) conjugates in aqueous solution of pH 7.4. The resulting polymeric micelles were characterized to have a hydrophobic hybrid chitosan/DBA core surrounded by hydrophilic PEG shells. Importantly, the encapsulation of ICG into the hybrid chitosan/DBA core of polymeric micelles by the combined hydrophobic and electrostatic interactions not only promoted the ICG loading but also enhanced its aqueous photostability. With the pH of micelle suspension being reduced from 7.4 to 5.0, upon acid-triggered cleavage of benzoic-imine bonds between chitosan and DBA as well as the extending of the protonated chitosan segments from hybrid cores toward aqueous phase, the rather hydrophobic DBA-rich core was formed within micelles, thereby leading to shrinking of the polymeric micelles. The robust ICG-loaded polymeric micelles showed several superior properties including the inhibition of ICG leakage under the mimic physiological and acidic conditions, favorable biocompatibility and photo-activated hyperthermia effect. This work suggests that the pH-responsive ICG-carrying chitosan-based micelles display great potential in cancer theranostic.
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Affiliation(s)
- Ching-Wei Hsu
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
| | - Ming-Hung Hsieh
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
| | - Min-Cong Xiao
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
| | - Ya-Hsuan Chou
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
| | - Tzu-Hao Wang
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
| | - Wen-Hsuan Chiang
- Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan.
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10
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Márquez-Domínguez L, Reyes-Leyva J, Herrera-Camacho I, Santos-López G, Scior T. Five Novel Non-Sialic Acid-Like Scaffolds Inhibit In Vitro H1N1 and H5N2 Neuraminidase Activity of Influenza a Virus. Molecules 2020; 25:molecules25184248. [PMID: 32947893 PMCID: PMC7571124 DOI: 10.3390/molecules25184248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 01/04/2023] Open
Abstract
Neuraminidase (NA) of influenza viruses enables the virus to access the cell membrane. It degrades the sialic acid contained in extracellular mucin. Later, it is responsible for releasing newly formed virions from the membrane of infected cells. Both processes become key functions within the viral cycle. Therefore, it is a therapeutic target for research of the new antiviral agents. Structure–activity relationships studies have revealed which are the important functional groups for the receptor–ligand interaction. Influenza virus type A NA activity was inhibited by five scaffolds without structural resemblance to sialic acid. Intending small organic compound repositioning along with drug repurposing, this study combined in silico simulations of ligand docking into the known binding site of NA, along with in vitro bioassays. The five proposed scaffolds are N-acetylphenylalanylmethionine, propanoic 3-[(2,5-dimethylphenyl) carbamoyl]-2-(piperazin-1-yl) acid, 3-(propylaminosulfonyl)-4-chlorobenzoic acid, ascorbic acid (vitamin C), and 4-(dipropylsulfamoyl) benzoic acid (probenecid). Their half maximal inhibitory concentration (IC50) was determined through fluorometry. An acidic reagent 2′-O-(4-methylumbelliferyl)-α-dN-acetylneuraminic acid (MUNANA) was used as substrate for viruses of human influenza H1N1 or avian influenza H5N2. Inhibition was observed in millimolar ranges in a concentration-dependent manner. The IC50 values of the five proposed scaffolds ranged from 6.4 to 73 mM. The values reflect a significant affinity difference with respect to the reference drug zanamivir (p < 0.001). Two compounds (N-acetyl dipeptide and 4-substituted benzoic acid) clearly showed competitive mechanisms, whereas ascorbic acid reflected non-competitive kinetics. The five small organic molecules constitute five different scaffolds with moderate NA affinities. They are proposed as lead compounds for developing new NA inhibitors which are not analogous to sialic acid.
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Affiliation(s)
- Luis Márquez-Domínguez
- Laboratorio de Virología, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Puebla 74630, Mexico; (L.M.-D.); (J.R.-L.)
- Posgrado en Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
- Laboratorio de Simulaciones Computacionales Moleculares, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72592, Mexico
| | - Julio Reyes-Leyva
- Laboratorio de Virología, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Puebla 74630, Mexico; (L.M.-D.); (J.R.-L.)
| | - Irma Herrera-Camacho
- Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico;
| | - Gerardo Santos-López
- Laboratorio de Virología, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Puebla 74630, Mexico; (L.M.-D.); (J.R.-L.)
- Correspondence: (G.S.-L.); (T.S.); Tel.: +52-244-444-0122 (G.S.-L.)
| | - Thomas Scior
- Laboratorio de Simulaciones Computacionales Moleculares, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72592, Mexico
- Correspondence: (G.S.-L.); (T.S.); Tel.: +52-244-444-0122 (G.S.-L.)
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11
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Xiang W, Wei X, Tang H, Li L, Huang R. Complete Genome Sequence and Biodegradation Characteristics of Benzoic Acid-Degrading Bacterium Pseudomonas sp. SCB32. Biomed Res Int 2020; 2020:6146104. [PMID: 32714981 PMCID: PMC7354641 DOI: 10.1155/2020/6146104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 04/17/2020] [Indexed: 11/25/2022]
Abstract
Allelochemicals are metabolites produced by living organisms that have a detrimental effect on other species when released into the environment. These chemicals play critical roles in the problems associated with crop replanting. Benzoic acid is a representative allelochemical found in root exudates and rhizosphere soil of crops and inhibits crop growth. The bioremediation of allelochemicals by microorganisms is an efficient decontamination process. In this research, a bacterial strain capable of degrading benzoic acid as the sole carbon source was isolated. The genome of the strain was sequenced, and biodegradation characteristics and metabolic mechanisms were examined. Strain SCB32 was identified as Pseudomonas sp. based on 16S rRNA gene analysis coupled with physiological and biochemical analyses. The degradation rate of 800 mg L-1 benzoic acid by strain SCB32 was greater than 97.0% in 24 h. The complete genome of strain SCB32 was 6.3 Mbp with a GC content of 64.6% and 5960 coding genes. Potential benzoic acid degradation genes were found by comparison to the KEGG database. Some key intermediate metabolites of benzoic acid, such as catechol, were detected by gas chromatography-mass spectrometry. The biodegradation pathway of benzoic acid, the ortho pathway, is proposed for strain SCB32 based on combined data from genome annotation and mass spectrometry. Moreover, the benzoic acid degradation products from strain SCB32 were essentially nontoxic to lettuce seedlings, while seeds in the benzoic acid-treated group showed significant inhibition of germination. This indicates a possible application of strain SCB32 in the bioremediation of benzoic acid contamination in agricultural environments.
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Affiliation(s)
- Wei Xiang
- Department of Agronomy, Agricultural College of Guangxi University, Nanning 530004, China
| | - Xiaolan Wei
- Department of Agronomy, Agricultural College of Guangxi University, Nanning 530004, China
| | - Hui Tang
- Guangxi Institute of Botany, Chinese Academy of Sciences, Guilin 541006, China
| | - Liangbo Li
- Department of Agronomy, Agricultural College of Guangxi University, Nanning 530004, China
| | - Rongshao Huang
- Department of Agronomy, Agricultural College of Guangxi University, Nanning 530004, China
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12
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Jaremko MJ, Davis TD, Corpuz JC, Burkart MD. Type II non-ribosomal peptide synthetase proteins: structure, mechanism, and protein-protein interactions. Nat Prod Rep 2020; 37:355-379. [PMID: 31593192 PMCID: PMC7101270 DOI: 10.1039/c9np00047j] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Covering: 1990 to 2019 Many medicinally-relevant compounds are derived from non-ribosomal peptide synthetase (NRPS) products. Type I NRPSs are organized into large modular complexes, while type II NRPS systems contain standalone or minimal domains that often encompass specialized tailoring enzymes that produce bioactive metabolites. Protein-protein interactions and communication between the type II biosynthetic machinery and various downstream pathways are critical for efficient metabolite production. Importantly, the architecture of type II NRPS proteins makes them ideal targets for combinatorial biosynthesis and metabolic engineering. Future investigations exploring the molecular basis or protein-protein recognition in type II NRPS pathways will guide these engineering efforts. In this review, we consolidate the broad range of NRPS systems containing type II proteins and focus on structural investigations, enzymatic mechanisms, and protein-protein interactions important to unraveling pathways that produce unique metabolites, including dehydrogenated prolines, substituted benzoic acids, substituted amino acids, and cyclopropanes.
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Affiliation(s)
- Matt J Jaremko
- Department of Chemistry and Biochemistry, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093-0358, USA.
| | - Tony D Davis
- Department of Chemistry and Biochemistry, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093-0358, USA.
| | - Joshua C Corpuz
- Department of Chemistry and Biochemistry, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093-0358, USA.
| | - Michael D Burkart
- Department of Chemistry and Biochemistry, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093-0358, USA.
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Lasinskas M, Jariene E, Vaitkeviciene N, Hallmann E, Najman K. Effect of Different Durations of Solid-Phase Fermentation for Fireweed ( Chamerion angustifolium (L.) Holub) Leaves on the Content of Polyphenols and Antioxidant Activity In Vitro. Molecules 2020; 25:E1011. [PMID: 32102409 PMCID: PMC7070727 DOI: 10.3390/molecules25041011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 02/19/2020] [Accepted: 02/24/2020] [Indexed: 12/12/2022] Open
Abstract
Fireweed has recently been recognized as a plant with high antioxidant potential and phenolic content. Its leaves can be fermented to prepare an infusion with ideal antioxidant activity. The aim of this study was to investigate and to determine the influence of solid-phase fermentation of different durations on the variation of polyphenols in the leaves of fireweed. Laboratory experiments were conducted in 2017-2018. The leaves of fireweed, naturally growing, were fermented for different periods of time: not fermented (control) and fermented for 24 and 48 h. The evaluation of polyphenols and antioxidant activity in leaves was performed using high- performance liquid chromatography (HPLC). Additionally, principal component analysis was used to characterize differences in bioactive compounds between fireweed samples fermented at different durations. Solid-phase fermented leaves were characterized by higher contents of oenothein B, quercetin and benzoic acid but had lower contents of quercetin-3-O-rutinoside, luteolin and chlorogenic and gallic acids. Antioxidant activity in short- (24 h) and long-term (48 h) fermentation (compared to control) gave the highest level of regression in 2017, but in 2018 the effect was observed only with short-term fermentation and control. In conclusion, solid-phase fermentation can be used to modulate biologically active compounds in fireweed leaves.
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Affiliation(s)
- Marius Lasinskas
- Vytautas Magnus University. Agriculture Academy, Institute of Agriculture and Food Sciences, Donelaicio str. 58, 44248 Kaunas, Lithuania; (E.J.); (N.V.)
| | - Elvyra Jariene
- Vytautas Magnus University. Agriculture Academy, Institute of Agriculture and Food Sciences, Donelaicio str. 58, 44248 Kaunas, Lithuania; (E.J.); (N.V.)
| | - Nijole Vaitkeviciene
- Vytautas Magnus University. Agriculture Academy, Institute of Agriculture and Food Sciences, Donelaicio str. 58, 44248 Kaunas, Lithuania; (E.J.); (N.V.)
| | - Ewelina Hallmann
- Warsaw University of Life Sciences, Institute of Human Nutrition Sciences, Department of Functional and Organic Food, Nowoursynowska 15c, 02-776 Warsaw, Poland; (E.H.); (K.N.)
| | - Katarzyna Najman
- Warsaw University of Life Sciences, Institute of Human Nutrition Sciences, Department of Functional and Organic Food, Nowoursynowska 15c, 02-776 Warsaw, Poland; (E.H.); (K.N.)
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14
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Zhang X. Oxidations of Benzhydrazide and Phenylacetic Hydrazide by Hexachloroiridate(IV): Reaction Mechanism and Structure-Reactivity Relationship. Molecules 2020; 25:molecules25020308. [PMID: 31940938 PMCID: PMC7024218 DOI: 10.3390/molecules25020308] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/30/2019] [Accepted: 01/09/2020] [Indexed: 11/21/2022] Open
Abstract
Benz(o)hydrazide (BH) is the basic aryl hydrazide; aryl hydrazides have been pursued in the course of drug discovery. Oxidations of BH and phenylacetic hydrazide (PAH) by hexachloroiridate(IV) ([IrCl6]2−) were investigated by use of stopped-flow spectral, rapid spectral scan, RP-HPLC and NMR spectroscopic techniques. The oxidation reactions followed well-defined second-order kinetics and the observed second-order rate constant k′ versus pH profiles were established over a wide pH range. Product analysis revealed that BH and PAH were cleanly oxidized to benzoic acid and phenylacetic acid, respectively. A reaction mechanism was proposed, resembling those suggested previously for the oxidations of isoniazid (INH) and nicotinic hydrazide (NH) by [IrCl6]2−. Rate constants of the rate-determining steps were evaluated, confirming a huge reactivity span of the protolysis species observed previously. The enolate species of BH is extremely reactive towards reduction of [IrCl6]2−. The determined middle-ranged negative values of activation entropies together with rapid scan spectra manifest that an outer-sphere electron transfer is probably taking place in the rate-determining steps. The reactivity of neutral species of hydrazides is clearly not correlated to the corresponding pKa values of the hydrazides. On the other hand, a linear correlation, logkenolate = (0.16 ± 0.07)pKenol + (6.1 ± 0.8), is found for the aryl hydrazides studied so far. The big intercept and the small slope of this correlation may pave a way for a rational design of new antioxidants based on aryl hydrazides. The present work also provides the pKa values for BH and PAH at 25.0 °C and 1.0 M ionic strength which were not reported before.
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Affiliation(s)
- Xiaolai Zhang
- College of Chemistry and Chemical Engineering, Shandong University, Jinan 250014, China
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15
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Zhang T, Liu H, Li Y, Li C, Wan G, Chen B, Li C, Wang Y. A pH-sensitive nanotherapeutic system based on a marine sulfated polysaccharide for the treatment of metastatic breast cancer through combining chemotherapy and COX-2 inhibition. Acta Biomater 2019; 99:412-425. [PMID: 31494294 DOI: 10.1016/j.actbio.2019.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/07/2019] [Accepted: 09/03/2019] [Indexed: 12/25/2022]
Abstract
Metastasis and chemotherapy resistance are the leading causes of breast cancer mortality. Celecoxib (CXB), a selective cyclooxygenase-2 (COX-2) inhibitor, has antiangiogenetic activity and inhibitory effect on tumor metastasis, and can also enhance the sensitivity of chemotherapeutic drug doxorubicin (DOX) in breast cancer. To combine anticancer effects of DOX and CXB more efficiently, we designed a pH-sensitive nanotherapeutic system based on propylene glycol alginate sodium sulfate (PSS), a marine sulfated polysaccharide that possesses anti-platelet aggregation activity and has been used as a heparinoid drug in China. A facile one-pot nanoprecipitation method was used to prepare this nanotherapeutic system named as PSS@DC nanoparticles, in which DOX and CXB were complexed to form hydrophobic nanocores and PPS coated these nanocores through conjugation with DOX via a highly acid-labile benzoic-imine linker. PSS@DC nanoparticles showed distinct pH-sensitivity and significantly accelerated the release of DOX at the acidic pH mimicking the tumor microenvironment and endocytic-related organelles. Compared to single- and mixed-drug treatments, PSS@DC nanoparticles notably inhibited the growth of mouse breast cancer 4T1 cells with an IC50 of about 0.82 μg/mL DOX, and meanwhile reduced cell migration, invasion and adhesion abilities more efficiently. In 4T1 tumor-bearing mice, PSS@DC nanoparticles exhibited good tumor-targeting ability and markedly inhibited tumor growth with an inhibition rate of approximately 73.3%, and furthermore suppressed tumor metastasis through anti-angiogenesis. In summary, this nanotherapeutic system shows a great potential for the treatment of metastatic breast cancer by combining chemotherapy and COX-2 inhibitor. STATEMENT OF SIGNIFICANCE: A pH-sensitive nanotherapeutic system (PSS@DC nanoparticles) containing both chemotherapeutic drug doxorubicin (DOX) and COX-2 specific inhibitor celecoxib was designed based on a marine sulfated polysaccharide that possesses anti-platelet aggregation activity and has been used as a heparinoid drug in China. PSS@DC nanoparticles had distinct pH-sensitivity and could accelerate the release of DOX at the acidic pH values of tumor microenvironment and endocytic-related organelles. Both in vitro and in vivo, PSS@DC nanoparticles showed synergistic effects on the suppression of breast tumor growth and metastasis by combining chemotherapy and COX-2 inhibition.
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Affiliation(s)
- Tao Zhang
- School of Pharmacy, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), Tianjin Medical University, Tianjin 300070, China
| | - Hui Liu
- School of Pharmacy, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), Tianjin Medical University, Tianjin 300070, China
| | - Yating Li
- School of Pharmacy, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), Tianjin Medical University, Tianjin 300070, China
| | - Chunyu Li
- Department of Integrated Traditional Chinese and Western Medicine, International Medical School, Tianjin Medical University, Tianjin 300070, China.
| | - Guoyun Wan
- School of Pharmacy, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), Tianjin Medical University, Tianjin 300070, China
| | - Bowei Chen
- School of Pharmacy, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), Tianjin Medical University, Tianjin 300070, China
| | - Chunxia Li
- Key Laboratory of Marine Drugs, Ministry of Education, Key Laboratory of Glycoscience and Glycotechnology of Shandong Province, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Yinsong Wang
- School of Pharmacy, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), Tianjin Medical University, Tianjin 300070, China.
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16
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Jirát J, Ondo D, Babor M, Ridvan L, Šoóš M. Complex methodology for rational design of Apremilast-benzoic acid co-crystallization process. Int J Pharm 2019; 570:118639. [PMID: 31465834 DOI: 10.1016/j.ijpharm.2019.118639] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/17/2019] [Accepted: 08/20/2019] [Indexed: 01/09/2023]
Abstract
A new co-crystal of pharmaceutical active ingredient Apremilast was successfully designed in this work. The discovered co-crystal with benzoic acid significantly improves key properties like the dissolution and stability of an otherwise poorly soluble Apremilast. A crystallization process was developed, which includes efficient solvent selection and ternary phase diagram construction to minimize risks during scale up. To increase efficiency, we propose that both steps be combined into a single methodology based on solubility data. A suitable solvent for the co-crystallization process was selected and ternary phase diagrams were constructed using three different modifications of thermodynamic model of solid-liquid equilibria. Based on the obtained information, the co-crystallization process was scaled-up to 100 mL. This provides a feasible process to produce larger amounts of this promising pharmaceutical solid form of Apremilast necessary for further drug development.
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Affiliation(s)
- Jan Jirát
- Department of Chemical Engineering, University of Chemistry and Technology, Technická 3, 166 28 Prague 6 - Dejvice, Czech Republic
| | - Daniel Ondo
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6 - Dejvice, Czech Republic
| | - Martin Babor
- Zentiva, k.s., U Kabelovny 130, 10237 Prague 10, Czech Republic; Department of Solid State Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6 - Dejvice, Czech Republic
| | - Luděk Ridvan
- Zentiva, k.s., U Kabelovny 130, 10237 Prague 10, Czech Republic
| | - Miroslav Šoóš
- Department of Chemical Engineering, University of Chemistry and Technology, Technická 3, 166 28 Prague 6 - Dejvice, Czech Republic.
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17
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Kamal S, Akhter N, Noreen R, Salman M, Khan SG, Roheen T, Yaqoob N, Kamal A, Siddique WA. A new approach to design 3(3-sulfamoylbenzamido) benzoic acid containing transition metal complexes: Characterization and Biological activities. Pak J Pharm Sci 2019; 32:2317-2324. [PMID: 31894061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Zn, Cu, Co and Ni are biocompatible metals as they are active center of many enzymes in the human body. Incorporation of these biocompatible metals into 3-(o-Sulfamoylphenyl) carbamoylbenzoic acid (I) makes them able to prove an excellent antimicrobial agent. In the present study Ni (II), Co (II), Cu(II) and Zn (II) complexes (III-VI) were synthesized from ligand (I) derive from 3-(o-Sulfamoylphenyl) carbamoylbenzoic acid and zinc, nickel, cobalt acetate tetrahydrate/copper acetate monohydrate. Synthesized complexes (III-VI) were characterized by FT-IR, 1H NMR and 13CNMR. III-VI have 81-93% yield while melting points recorded were in the range of 209-239oC. Purity of ligands and their respective complexes was confirmed by TLC. Results of antibacterial properties suggested that III, IV, V and VI were highly active against gram +ve (S. epidermidis, B. subtilis. S. aureus, S. mutans) and gram -ve bacteria (E. coli and P. aruginosa). Comparison was also performed to check whether metal complexes or ligand with its derivative exhibit best result against all tested strains. The anthelmintic activity of the complexes III-VI against tape worm, liver fluke, thread worm, and hook worm using three different concentrations (15, 30, 45mg/mL), significantly (p<0.01) paralyzed the worms followed by death, which was comparable with that of the standard. Overall results indicated that S. epidermidis, S. mutans, E. coli and B. subtilis are very sensitive to complex III & IV and can be used for treatment of bacterial infections whereas Complex-V, could a potent target for anti-parasite therapy.
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Affiliation(s)
- Shagufta Kamal
- Department of Biochemistry, Govt. College University, Faisalabad, Pakistan
| | - Naheed Akhter
- Department of Allied Health Professional, Govt. College University, Faisalabad, Pakistan
| | - Razia Noreen
- Department of Biochemistry, Govt. College University, Faisalabad, Pakistan
| | - Mahwish Salman
- Department of Biochemistry, Govt. College University, Faisalabad, Pakistan
| | - Samreen Gul Khan
- Department of Chemistry, Govt. College University, Faisalabad, Pakistan
| | - Taleeha Roheen
- Department of Chemistry, University of Sargodha, Sargodha, Pakistan
| | - Nazia Yaqoob
- Deparment of Chemistry, Govt. College Women University, Faisalabad, Pakistan
| | - Amna Kamal
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
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18
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Ghazanfari-Sarabi S, Habibi-Rezaei M, Eshraghi-Naeeni R, Moosavi-Movahedi AA. Prevention of haemoglobin glycation by acetylsalicylic acid (ASA): A new view on old mechanism. PLoS One 2019; 14:e0214725. [PMID: 30986221 PMCID: PMC6464172 DOI: 10.1371/journal.pone.0214725] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 03/19/2019] [Indexed: 01/10/2023] Open
Abstract
Diabetic hyperglycemia provokes glycation of haemoglobin (Hb), an abundant protein in red blood cells (RBCs), by increasing its exposure to carbohydrates. Acetylsalicylic acid (ASA; Aspirin) is one of the first agents, which its antiglycation effect was witnessed. Although the precise molecular mechanism of action of ASA on protein glycation is not indisputably perceived, acetylation as its main molecular mechanism has been proposed. This report aims to unravel the meticulous mechanism of action of ASA by using two ASA analogues; benzoic acid (BA) and para-nitrobenzoic acid (NBA), despite their lack of acetyl group. In this regard, the inhibitory effect of these two chemicals in comparison with ASA on Hb fructation is reported. UV-visible spectroscopy, intrinsic advanced glycation end products (AGE) fluorescence spectroscopy, extrinsic thioflavin T (ThT) binding fluorescence spectroscopy, 2,4,6-trinitrobenzenesulfonic acid (TNBSA) assay, and single cell gel electrophoresis (SCGE) were used to explore the effects of BA and NBA in comparison with aforementioned chemicals in the context of protein glycation. In spite of the lack of acetyl substitution, NBA is reported as a novel agent with prominent inhibitory efficacy than ASA on the protein glycation. This fact brings up a possible new mechanism of action of ASA and reconsiders acetylation as the sole mechanism of inhibition of protein glycation.
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Affiliation(s)
| | - Mehran Habibi-Rezaei
- School of Biology, College of Science, University of Tehran, Tehran, Iran
- Nano-Biomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, Tehran, Iran
- * E-mail:
| | | | - Ali Akbar Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
- Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
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He X, Zhang H, Liang X. Separation of six compounds from pigeon pea leaves by elution-extrusion counter-current chromatography. J Sep Sci 2019; 42:1202-1209. [PMID: 30653252 DOI: 10.1002/jssc.201801111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 12/29/2022]
Abstract
A valid and reliable method was established to separate six compounds from pigeon pea leaves via elution-extrusion counter-current chromatography. A solvent system composed of n-hexane/methanol/formic acid aqueous solution with pH = 3 (10:6:4, v/v) was screened to achieve satisfactory isolation from the ethanol extract of pigeon pea leaves. Four compounds, 9.2 mg of compound 1 (96.8%), 3.2 mg of 2 (88.0%), 6.2 mg of 4 (94.2%) and 25.2 mg of 5 (94.2%), were obtained by conventional elution from 100 mg of the precipitation fraction, respectively. Two compounds, 14.4 mg of 3 (96.3%) and 28.1 mg of 6 (96.6%), with high K values were obtained by the subsequent extrusion procedure. The compounds 1-6 were identified as 3-methoxy-5-(2-phenylethenyl)-phenol, pinostrobin chalcone, pinostrobin, 2-hydroxy-4-methoxy-6-(2-phenylvinyl)-benzoic acid, longistylin C and cajaninstilbene acid by quadrupole time-of-flight mass spectrometry, and 1 H and 13 C NMR spectroscopy. The in vitro antiproliferation activities of compounds 1, 5 and 6 against human hepatoma cell were evaluated and the half-maximum inhibitory concentrations were acquired.
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Affiliation(s)
- Xiaoai He
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Huichen Zhang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Xianrui Liang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. China
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20
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Llewelyn VK, Berger L, Glass BD. Effects of skin region and relative lipophilicity on percutaneous absorption in the toad Rhinella marina. Environ Toxicol Chem 2019; 38:361-367. [PMID: 30370675 DOI: 10.1002/etc.4302] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/02/2018] [Accepted: 10/23/2018] [Indexed: 06/08/2023]
Abstract
Owing to the dynamic interaction between frog skin and the environment, xenobiotics in frog habitats are of particular concern, and knowledge of percutaneous absorption in frog skin is necessary for risk-mitigation purposes. Baseline transdermal kinetics in adult aquatic and arboreal frog species have recently been reported; however, there is little information regarding absorption kinetics in adult terrestrial species. The present study investigated the in vitro absorption kinetics of 3 model chemicals-caffeine, benzoic acid, and ibuprofen-through different skin regions in the terrestrial toad Rhinella marina. Caffeine flux was consistently higher than that of the other 2 chemicals (p < 0.001), whereas the fluxes of the moderately and highly lipophilic chemicals (benzoic acid and ibuprofen) were similar, regardless of skin region. When considering individual chemicals, caffeine demonstrated increased flux through the ventral pelvic skin compared with the ventral thoracic or dorsal skin regions. Flux did not differ between skin regions for either benzoic acid or ibuprofen. These findings have implications for management of environmental contamination in frog habitats, as many environmental xenobiotics are of moderate to high lipophilicity and would be expected to be equally absorbed from all skin surfaces in terrestrial toads. Environ Toxicol Chem 2019;38:361-367. © 2018 SETAC.
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Affiliation(s)
- Victoria K Llewelyn
- Pharmacy, College of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
| | - Lee Berger
- One Health Research Group, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
| | - Beverley D Glass
- Pharmacy, College of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
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21
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Santos PSM, Cardoso HB, Rocha-Santos TAP, Duarte AC. Oxidation of benzoic acid from biomass burning in atmospheric waters. Environ Pollut 2019; 244:693-704. [PMID: 30384075 DOI: 10.1016/j.envpol.2018.10.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 09/18/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
This work evaluates the degradation of benzoic acid, a tracer from biomass burning, by different oxidation agents (Fe (III); H2O2; sunlight; and combinations of the previous ones) in model solutions and in real atmospheric waters. The extent of reactions was assessed by Ultraviolet-Visible and molecular fluorescence spectroscopies. The oxidation of benzoic acid occurred with the chemical oxidants Fe (III), H2O2, Fe (III) and H2O2 simultaneously in the presence of sunlight, and with Fe (III) and H2O2 simultaneously in the absence of light. The decrease of the pH value from neutral to acid for atmospheric waters generally increased the extent of oxidation. Sunlight was an important oxidation agent, and its combination with chemical oxidants increased the oxidation rate of benzoic acid, possibly due to the photogeneration of hydroxyl radicals. The results also suggested the occurrence of direct and indirect photolysis of benzoic acid in atmospheric waters. Moreover, the oxidation of benzoic acid produced new and more complex chromophoric compounds, which were then degraded. In addition, the nocturnal period is not sufficient for the full degradation of benzoic acid and of the intermediates formed by Fenton-like oxidation. The diurnal period may be enough for their full degradation through photo-Fenton-like oxidation, but this depends on the composition of the atmospheric waters, namely of the chromophoric content. Thus, this study highlights that benzoic acid from biomass burning, and its derivatives, may persist in atmospheric waters for periods of longer than one day, becoming available for other reactions, and may also affect the terrestrial and aquatic ecosystems through the wet depositions.
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Affiliation(s)
- Patrícia S M Santos
- CESAM (Centre for Environmental and Marine Studies) & Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
| | - Helena B Cardoso
- CESAM (Centre for Environmental and Marine Studies) & Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Teresa A P Rocha-Santos
- CESAM (Centre for Environmental and Marine Studies) & Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Armando C Duarte
- CESAM (Centre for Environmental and Marine Studies) & Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
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22
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Dawaba AM, Dawaba HM. Application of Optimization Technique to Develop Nano-Based Carrier of Nigella Sativa Essential Oil: Characterization and Assessment. Recent Pat Drug Deliv Formul 2019; 13:228-240. [PMID: 31096899 PMCID: PMC7011686 DOI: 10.2174/1872211313666190516095309] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 04/27/2019] [Accepted: 05/06/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND Chitosan, a naturally occurring polymer, has interesting applications in the field of drug delivery due to its plentiful advantages as biodegradability, biocompatibility and nontoxic nature. Nigella sativa essential oil is unstable, volatile, and insoluble in water and these problems confine its usage in developing new medicines. OBJECTIVE This study focuses on developing a chitosan-based nanocarrier for the encapsulation of Nigella Sativa essential oil. By using Quality by design outline, the quality target product outline, critical quality attributes and critical material attributes were defined by knowledge and risk-based procedures. METHODS According to defined critical material attributes, Optimization software (Statgraphics XVII) was used to study the effect of the processing parameters. The processing parameters identified and fixed first with a "One factor at a time" approach. Various physicochemical characterization techniques were performed. RESULTS As a result, the ratio of chitosan to benzoic acid (2:1) along with the stirring rate (4000 rpm) produced minimum-sized particles (341 nm) with good stability. The anti-bacterial activity study using Staph. Aureus strain proved that the optimized nanoparticles were more efficacious than the pure oil based on the diameter of inhibition zone obtained (diameter =5.5 cm for optimized formula vs diameter = 3.6 cm for pure oil). Furthermore, MTT (methyl thiazolyl-diphenyl-tetrazolium bromide) assay was performed to compare the in vitro cytotoxicity using two different cell lines (i.e. HCT 116 for colorectal carcinoma and PC3 for prostatic cancer). It was found that in both cell lines, the optimized nanoparticles had noteworthy antiproliferative properties illustrated by determining the concentration at which 50% of growth is inhibited (IC50). The optimized nanoparticles showed lower IC50 (17.95 ±0.82 and 4.02 ±0.12μg/ml) than the bare oil IC50 (43.56 ±1.95 and 29.72 ±1.41μg/ml).
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Affiliation(s)
- Aya M. Dawaba
- Address correspondence to this author at Department of Pharmaceutics, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo 11651, Egypt;
Tel: +201092249996; E-mails: ;
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23
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Biswal AK, Saha S. Prolonging food shelf-life by dual actives release from multi-layered polymer particles. Colloids Surf B Biointerfaces 2018; 175:281-290. [PMID: 30551015 DOI: 10.1016/j.colsurfb.2018.12.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 11/27/2018] [Accepted: 12/03/2018] [Indexed: 01/27/2023]
Abstract
Biodegradable polymer based 'controlled release packaging' technology has ability to release packaging actives in controlled manner to prolong the food shelf-life. Currently available systems are not sufficiently capable of releasing multiple actives in sustainable fashion. Hence, the purpose of this study was to develop dual actives (antioxidant and antibacterial) loaded multilayered microparticles in one step and to release them at rates suitable for long-term inhibition of bacterial growth as well as lipid oxidation in food. In order to achieve this goal, 2 kinds of multilayered polymer particles made up of PLLA (Poly(l-lactic acid)) and PLGA (Poly(dl-lactic-co-glycolic acid) with varying viscosity were developed using emulsion solvent evaporation method. Surprisingly, low viscous PLGA resulted tri-layered particles (PLGA/PLLA/PLGA: shell/middle/core) instead of bi-layered (PLGA/PLLA: shell/core) particles as observed for high viscous PLGA. The mechanism of formation of tri-layered particles was investigated in detail. The outermost layer consisted of relatively more hydrophilic polymer PLGA along with benzoic acid (antibacterial) and the inner core comprised of hydrophobic polymer PLLA and tocopherol (antioxidant). Release study demonstrated that release rate of dual actives were significantly accelerated from tri-layered particles in comparison to bi-layered one and their release profiles can be well explained with the help of Ridger-Peppas model. Both sets of particles exhibited long-term antibacterial (against both Escherichia coli and Staphylococcus aureus) as well as antioxidant effect over a period of 60 days. The results show for the first time the feasibility of using multilayered microparticles to prolong the food shelf-life by simultaneous release of multiple actives.
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Affiliation(s)
- Agni Kumar Biswal
- Department of Materials Science and Engineering, Indian Institute of Technology, Delhi, 110016, India
| | - Sampa Saha
- Department of Materials Science and Engineering, Indian Institute of Technology, Delhi, 110016, India.
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24
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Fijołek L, Nawrocki J. Phosphate helps to recover from scavenging effect of chloride in self-enhanced ozonation. Chemosphere 2018; 212:802-810. [PMID: 30189407 DOI: 10.1016/j.chemosphere.2018.08.148] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 08/06/2018] [Accepted: 08/29/2018] [Indexed: 06/08/2023]
Abstract
Self-enhanced ozonation is a new approach for generation of hydroxyl radicals at low pH. Unfortunately at acidic environment chloride effectively scavenges the radicals. Therefore, the presence of chloride in ozonated medium would be detrimental for the most of the process practical applications. In self-enhanced ozonation process almost complete degradation of aromatics is observed during first 10min. Addition of 3.22 mM of chloride completely hinders degradation of nitrobenzene (NB) or benzoic acid (BA). This work shows that the scavenging effect of chlorides may be overcome with an excess of phosphate. Addition of 50 mM of phosphates to ozonated water brings back 74% removal of NB or 87% of BA, when 24 μM of compound is ozonated in the presence of 3.22 mM chloride during 60min. The excess of phosphate sufficient to overcome the scavenging activity of chloride in the self-enhanced ozonation of aromatic compounds at acidic pH is much lower than that implied by the reaction rates of both ions with hydroxyl radicals. To the best of our knowledge the recovering effect of phosphate has not been shown before.
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Affiliation(s)
- Lilla Fijołek
- Adam Mickiewicz University, Faculty of Chemistry, Department of Water Treatment Technology, 89b Umultowska st., 61-614, Poznań, Poland.
| | - Jacek Nawrocki
- Adam Mickiewicz University, Faculty of Chemistry, Department of Water Treatment Technology, 89b Umultowska st., 61-614, Poznań, Poland.
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25
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Zherebker A, Shirshin E, Kharybin O, Kostyukevich Y, Kononikhin A, Konstantinov AI, Volkov D, Roznyatovsky VA, Grishin YK, Perminova IV, Nikolaev E. Separation of Benzoic and Unconjugated Acidic Components of Leonardite Humic Material Using Sequential Solid-Phase Extraction at Different pH Values as Revealed by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry and Correlation Nuclear Magnetic Resonance Spectroscopy. J Agric Food Chem 2018; 66:12179-12187. [PMID: 30335379 DOI: 10.1021/acs.jafc.8b04079] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Here, we report on sequential solid-phase extraction of leonardite hymatomelanic acid (CHM) on a non-ionic sorbent at four steadily lowered pH values: 7, 5, 3, and 2, yielding fractions with different acidic properties. Using nuclear magnetic resonance (NMR) spectroscopy and ultrahigh-resolution mass spectrometry, we revealed a gradual shift of dominating scaffolds in the fractions of CHM from reduced saturated to oxidized aromatic compounds. An increase on the average aromaticity of the CHM fractions was accompanied by a red shift in fluorescence spectra. These results were supported by heteronuclear single quantum coherence and heteronuclear multiple bond correlation NMR experiments. We have demonstrated that the CHM fraction isolated at pH 5 was dominated by aliphatic carboxyl carriers, while the pH 3 fraction was dominated by aromatic carboxyl acids. The developed fractionation technique will enable deeper insight on structure-property relationships and the design of the humic-based materials with tailored reactive properties.
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Affiliation(s)
- Alexander Zherebker
- Skolkovo Institute of Science and Technology , 143025 Skolkovo , Moscow Region, Russia
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
- Institute for Energy Problems of Chemical Physics of Russian Academy of Sciences , Leninskij Prospekt 38-2 , 119334 Moscow , Russia
| | - Evgeny Shirshin
- Department of Physics , Lomonosov Moscow State University , Leninskie Gory 1/2 , 119991 Moscow , Russia
| | - Oleg Kharybin
- Skolkovo Institute of Science and Technology , 143025 Skolkovo , Moscow Region, Russia
- Institute for Energy Problems of Chemical Physics of Russian Academy of Sciences , Leninskij Prospekt 38-2 , 119334 Moscow , Russia
| | - Yury Kostyukevich
- Skolkovo Institute of Science and Technology , 143025 Skolkovo , Moscow Region, Russia
- Institute for Energy Problems of Chemical Physics of Russian Academy of Sciences , Leninskij Prospekt 38-2 , 119334 Moscow , Russia
- Moscow Institute of Physics and Technology , 141700 Dolgoprudnyi , Moscow Region, Russia
| | - Alexey Kononikhin
- Institute for Energy Problems of Chemical Physics of Russian Academy of Sciences , Leninskij Prospekt 38-2 , 119334 Moscow , Russia
- Orekhovich Institute of Biomedical Chemistry , Russian Academy of Sciences , Pogodinskaya Ulitsa 10 , 119121 Moscow , Russia
- Moscow Institute of Physics and Technology , 141700 Dolgoprudnyi , Moscow Region, Russia
| | - Andrey I Konstantinov
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | - Dmitry Volkov
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | | | - Yuri K Grishin
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | - Irina V Perminova
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | - Eugene Nikolaev
- Skolkovo Institute of Science and Technology , 143025 Skolkovo , Moscow Region, Russia
- Institute for Energy Problems of Chemical Physics of Russian Academy of Sciences , Leninskij Prospekt 38-2 , 119334 Moscow , Russia
- Orekhovich Institute of Biomedical Chemistry , Russian Academy of Sciences , Pogodinskaya Ulitsa 10 , 119121 Moscow , Russia
- Moscow Institute of Physics and Technology , 141700 Dolgoprudnyi , Moscow Region, Russia
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26
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Abstract
Deep eutectic solvents (DES) may become important alternatives as versatile, biodegradable, and cost-effective solvents for biocatalysis. Especially for reactions where substrates and products of different polarities are combined, the design of a tailored solvent that may dissolve all compounds-while being enzyme-compatible at the same time-appears to be a strong ally in sustainable chemistry. Herein it is shown that the combination of DES with "water as cosolvent" (in a range from 5% to 20% water, v/v) leads to non-conventional solvents with significantly reduced viscosity. In these media, lipases and proteases can perform synthetic reactions efficiently, and hydrolytic side reactions remain suppressed (even at 20% water, v/v). The use of these less viscous non-conventional media could also provide options for hydrolase-catalyzed synthetic reactions even in continuous fashion.
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Affiliation(s)
- Nadia Guajardo
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Santiago, Chile.
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27
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Qin H, Xiao R, Zhang R, Chen J. Efficient adsorption of benzoic acid from aqueous solution by nitrogen-containing activated carbon. Water Sci Technol 2018; 2017:686-694. [PMID: 30016286 DOI: 10.2166/wst.2018.235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Adsorption is an efficient treatment process to remove benzoic acid from aqueous solution. In this study, nitrogen-containing surface groups were introduced onto activated carbon (AC) surface by modification with ammonium hydroxide, ammonium carbonate, melamine or urea. The nitrogen-containing AC samples were characterized using N2 adsorption-desorption, Boehm titration, determination of the pH of the point of zero charge (pHpzc) and X-ray photoelectron spectroscopy. The adsorption of benzoic acid from aqueous solution by nitrogen-containing AC has been studied. The Langmuir model fitted the experimental data of equilibrium isotherms better than the Freundlich model. At initial solution pH 2.1, the adsorption capacity was closely related with the amount of pyridinic and pyrrolic N on the AC surface, which indicated these two nitrogen-containing groups played an important part in the adsorption process. The enhancement of adsorption capacity was due to the strengthened π-π dispersion force between benzoic acid and the AC basal plane. Since the surface charge of AC as well as the existence form of benzoic acid varied with solution pH value, the adsorption capacity was found to be highest at pH 3.8 and dropped sharply at higher or lower pH values.
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Affiliation(s)
- Hangdao Qin
- School of Material and Chemical Engineering, Tongren University, Tongren 554300, China E-mail:
| | - Rong Xiao
- School of Pharmacy, Tongren Polytechnic College, Tongren 554300, China
| | - Renhui Zhang
- School of Material and Chemical Engineering, Tongren University, Tongren 554300, China E-mail:
| | - Jing Chen
- School of Material and Chemical Engineering, Tongren University, Tongren 554300, China E-mail:
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28
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Markle TF, Darcy JW, Mayer JM. A new strategy to efficiently cleave and form C-H bonds using proton-coupled electron transfer. Sci Adv 2018; 4:eaat5776. [PMID: 30027119 PMCID: PMC6044737 DOI: 10.1126/sciadv.aat5776] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 05/31/2018] [Indexed: 05/06/2023]
Abstract
Oxidative activation and reductive formation of C-H bonds are crucial in many chemical, industrial, and biological processes. Reported here is a new strategy for these transformations, using a form of proton-coupled electron transfer (PCET): intermolecular electron transfer coupled to intramolecular proton transfer with an appropriately placed cofactor. In a fluorenyl-benzoate, the positioned carboxylate facilitates rapid cleavage of a benzylic C-H bond upon reaction with even weak 1e- oxidants, for example, decamethylferrocenium. Mechanistic studies establish that the proton and electron transfer to disparate sites in a single concerted kinetic step, via multi-site concerted proton-electron transfer. This work represents a new elementary reaction step available to C-H bonds. This strategy is extended to reductive formation of C-H bonds in two systems. Molecular design considerations and possible utility in synthetic and enzymatic systems are discussed.
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Affiliation(s)
- Todd F. Markle
- Department of Chemistry, Yale University, New Haven, CT 06520–8107, USA
| | - Julia W. Darcy
- Department of Chemistry, Yale University, New Haven, CT 06520–8107, USA
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29
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Xie P, Yue S, Ding J, Wan Y, Li X, Ma J, Wang Z. Degradation of organic pollutants by Vacuum-Ultraviolet (VUV): Kinetic model and efficiency. Water Res 2018; 133:69-78. [PMID: 29367049 DOI: 10.1016/j.watres.2018.01.019] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 12/04/2017] [Accepted: 01/07/2018] [Indexed: 05/19/2023]
Abstract
Vacuum-Ultraviolet (VUV), an efficient and green method to produce hydroxyl radical (•OH), is effective in degrading numerous organic contaminants in aqueous solution. Here, we proposed an effective and simple kinetic model to describe the degradation of organic pollutants in VUV system, by taking the •OH scavenging effects of formed organic intermediates as co-existing organic matter in whole. Using benzoic acid (BA) as a •OH probe, •OH was regarded vital for pollutant degradation in VUV system, and the thus developed model successfully predicted its degradation kinetics under different conditions. Effects of typical influencing factors such as BA concentrations and UV intensity were investigated quantitatively by the model. Temperature was found to be an important influencing factor in the VUV system, and the quantum yield of •OH showed a positive linear dependence on temperature. Impacts of humic acid (HA), alkalinity, chloride, and water matrices (realistic waters) on the oxidation efficiency were also examined. BA degradation was significantly inhibited by HA due to its scavenging of •OH, but was influenced much less by the alkalinity and chloride; high oxidation efficiency was still obtained in the realistic water. The degradation kinetics of three other typical micropollutants including bisphenol A (BPA), nitrobenzene (NB) and dimethyl phthalate (DMP), and the mixture of co-existing BA, BPA and DMP were further studied, and the developed model predicted the experimental data well, especially in realistic water. It is expected that this study will provide an effective approach to predict the degradation of organic micropollutants by the promising VUV system, and broaden the application of VUV system in water treatment.
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Affiliation(s)
- Pengchao Xie
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Siyang Yue
- Design and Research Institute of Architecture and Urban Planning, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jiaqi Ding
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Ying Wan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xuchun Li
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Zongping Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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30
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Du Y, Xue J, Cai Q, Zhang Q. Spectroscopic investigation on structure and pH dependent Cocrystal formation between gamma-aminobutyric acid and benzoic acid. Spectrochim Acta A Mol Biomol Spectrosc 2018; 191:377-381. [PMID: 29055755 DOI: 10.1016/j.saa.2017.10.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 09/25/2017] [Accepted: 10/04/2017] [Indexed: 06/07/2023]
Abstract
Vibrational spectroscopic methods, including terahertz absorption and Raman scattering spectroscopy, were utilized for the characterization and analysis of gamma-aminobutyric acid (GABA), benzoic acid (BA), and the corresponding GABA-BA cocrystal formation under various pH values of aqueous solution. Vibrational spectroscopic results demonstrated that the solvent GABA-BA cocrystal, similar as grinding counterpart, possessed unique characteristic features compared with that of starting parent compounds. The change of vibrational modes for GABA-BA cocrystal comparing with starting components indicates there is strong inter-molecular interaction between GABA and BA molecules during its cocrystallization process. Formation of GABA-BA cocrystal under slow solvent evaporation is impacted by the pH value of aqueous solution. Vibrational spectra indicate that the GABA-BA cocrystal could be stably formed with the solvent condition of 2.00≤pH≤7.00. In contrast, such cocrystallization did not occur and the cocrystal would dissociate into its parent components when the pH value of solvent is lower than 2.00. This study provides experimental benchmark to discriminate and identify the structure of cocrystal and also pH-dependent cocrystallization effect with vibrational spectroscopic techniques in solid-state pharmaceutical fields.
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Affiliation(s)
- Yong Du
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China.
| | - Jiadan Xue
- Department of Chemisty, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Qiang Cai
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
| | - Qi Zhang
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
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31
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Nguyen TT, Grigorjeva L, Daugulis O. Cobalt-Catalyzed Coupling of Benzoic Acid C-H Bonds with Alkynes, Styrenes, and 1,3-Dienes. Angew Chem Int Ed Engl 2018; 57:1688-1691. [PMID: 29319216 PMCID: PMC5788714 DOI: 10.1002/anie.201711968] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [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: 11/21/2017] [Indexed: 02/05/2023]
Abstract
A method for cobalt-catalyzed, carboxylate-directed functionalization of arene C-H bonds is reported. Alkynes, styrenes, and 1,3-dienes can be coupled with benzoic acids to provide cyclic products in good yields. The reactions proceed in the presence of a cobalt(II) hexafluoroacetylacetonate catalyst, (TMS)2 NH base, Ce(SO4 )2 cooxidant, and oxygen oxidant.
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Affiliation(s)
- Tung Thanh Nguyen
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
| | - Liene Grigorjeva
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
| | - Olafs Daugulis
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
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Ferdowsi P, Saygili Y, Zhang W, Edvinson T, Kavan L, Mokhtari J, Zakeeruddin SM, Grätzel M, Hagfeldt A. Molecular Design of Efficient Organic D-A-π -A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye-Sensitized Solar Cells. ChemSusChem 2018; 11:494-502. [PMID: 29227038 DOI: 10.1002/cssc.201701949] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/08/2017] [Indexed: 06/07/2023]
Abstract
A metal-free organic sensitizer, suitable for the application in dye-sensitized solar cells (DSSCs), has been designed, synthesized and characterized both experimentally and theoretically. The structure of the novel donor-acceptor-π-bridge-acceptor (D-A-π-A) dye incorporates a triphenylamine (TPA) segment and 4-(benzo[c][1,2,5]thiadiazol-4-ylethynyl)benzoic acid (BTEBA). The triphenylamine unit is widely used as an electron donor for photosensitizers, owing to its nonplanar molecular configuration and excellent electron-donating capability, whereas 4-(benzo[c][1,2,5]thiadiazol-4-ylethynyl)benzoic acid is used as an electron acceptor unit. The influences of I3- /I- , [Co(bpy)3 ]3+/2+ and [Cu(tmby)2 ]2+/+ (tmby=4,4',6,6'-tetramethyl-2,2'-bipyridine) as redox electrolytes on the DSSC device performance were also investigated. The maximal monochromatic incident photon-to-current conversion efficiency (IPCE) reached 81 % and the solar light to electrical energy conversion efficiency of devices with [Cu(tmby)2 ]2+/+ reached 7.15 %. The devices with [Co(bpy)3 ]3+/2+ and I3- /I- electrolytes gave efficiencies of 5.22 % and 6.14 %, respectively. The lowest device performance with a [Co(bpy)3 ]3+/2+ -based electrolyte is attributed to increased charge recombination.
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Affiliation(s)
- Parnian Ferdowsi
- Department of Textile engineering, Faculty of Engineering, University of Guilan, Rasht, 41635-3756, Iran
- Department of chemistry, Laboratory of Photomolecular Science, Institute of Chemical Sciences Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Yasemin Saygili
- Department of chemistry, Laboratory of Photomolecular Science, Institute of Chemical Sciences Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Weiwei Zhang
- Department of chemistry, Laboratory of Photonics and Interfaces, Institute of Chemical Sciences, Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Tomas Edvinson
- Department of Engineering Sciences, Solid State Physics, Uppsala University, Box 534, 75121, Uppsala, Sweden
| | - Ladislav Kavan
- Department of chemistry, Laboratory of Photonics and Interfaces, Institute of Chemical Sciences, Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
- J. Heyrovsky Institute of Physical Chemistry, 1823, Prague, Czech Republic
| | - Javad Mokhtari
- Department of Textile engineering, Faculty of Engineering, University of Guilan, Rasht, 41635-3756, Iran
| | - Shaik M Zakeeruddin
- Department of chemistry, Laboratory of Photonics and Interfaces, Institute of Chemical Sciences, Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Michael Grätzel
- Department of chemistry, Laboratory of Photonics and Interfaces, Institute of Chemical Sciences, Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Anders Hagfeldt
- Department of chemistry, Laboratory of Photomolecular Science, Institute of Chemical Sciences Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
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Begala M. Conversion of benzoic acid into phenol in an ITMS under CI-MS n conditions. Recognition of ortho-chlorobenzoyl derivatives. J Mass Spectrom 2018; 53:30-38. [PMID: 28929601 DOI: 10.1002/jms.4031] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 09/01/2017] [Accepted: 09/11/2017] [Indexed: 06/07/2023]
Abstract
Isomeric chlorobenzoyl cations (m/z 139), under collision-induced experiments, fragment identically. Chlorobenzoyl cations can be efficiently converted into cholorophenol radical cations by the reaction with methanol in the ion trap analyzer under CI-MSn conditions. The substitution of the carbonyl group with a hydroxyl moiety is able to induce an ortho effect, which is absent in the startingortho-chlorobenzoyl cation. This transformation could be useful to recognize ortho-chlorinated benzoyl derivatives without the need of MS spectrum comparison of the whole set of isomers. The method reported in this study could be applicable to biologically active molecules that dissociate to form the chlorobenzoyl cations under CI or CI collision-induced dissociation conditions, such as indomethacin, the degradation products from the insect growth regulator 1-(2-chlorobenzoyl)-3-(4-chlorophenyl) urea, and lorazepam.
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Affiliation(s)
- Michela Begala
- Department of Life and Environmental Sciences, Unit of Drug Sciences, University of Cagliari, via Ospedale 72, 09124, Cagliari, Italy
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Abstract
α-Ketoamides undergo redox-annulations with cyclic secondary amines, such as 1,2,3,4-tetrahydroisoquinoline, pyrrolidine, piperidine, and morpholine. Catalytic amounts of benzoic acid significantly accelerate these transformations. This approach provides polycyclic imidazolidinone derivatives in typically good yields.
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Affiliation(s)
- Zhengbo Zhu
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Xin Lv
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
- Department
of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People’s Republic
of China
| | - Jason E. Anesini
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
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Li H, Cao L, Yang C, Zhang Z, Zhang B, Deng K. Selective oxidation of benzyl alcohols to benzoic acid catalyzed by eco-friendly cobalt thioporphyrazine catalyst supported on silica-coated magnetic nanospheres. J Environ Sci (China) 2017; 60:84-90. [PMID: 29031450 DOI: 10.1016/j.jes.2017.05.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/31/2017] [Accepted: 05/08/2017] [Indexed: 06/07/2023]
Abstract
A novel magnetically recoverable thioporphyrazine catalyst (CoPz(S-Bu)8/SiO2@Fe3O4) was prepared by immobilization of the cobalt octkis(butylthio) porphyrazine complex (CoPz(S-Bu)8) on silica-coated magnetic nanospheres (SiO2@Fe3O4). The composite CoPz(S-Bu)8/SiO2@Fe3O4 appeared to be an active catalyst in the oxidation of benzyl alcohol in aqueous solution using hydrogen peroxide (H2O2) as oxidant under Xe-lamp irradiation, with 36.4% conversion of benzyl alcohol, about 99% selectivity for benzoic acid and turnover number (TON) of 61.7 at ambient temperature. The biomimetic catalyst CoPz(S-Bu)8 was supported on the magnetic carrier SiO2@Fe3O4 so as to suspend it in aqueous solution to react with substrates, utilizing its lipophilicity. Meanwhile the CoPz(S-Bu)8 can use its unique advantages to control the selectivity of photocatalytic oxidation without the substrate being subjected to deep oxidation. The influence of various reaction parameters on the conversion rate of benzyl alcohol and selectivity of benzoic acid was investigated in detail. Moreover, photocatalytic oxidation of substituted benzyl alcohols was obtained with high conversion and excellent selectivity, specifically conversion close to 70%, selectivity close to 100% and TON of 113.6 for para-position electron-donating groups. The selectivity and eco-friendliness of the biomimetic photocatalyst give it great potential for practical applications.
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Affiliation(s)
- Huan Li
- Key Laboratory of Catalysis and Material Sciences of the State Ethnic Affairs Commission & Ministry of Education, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, China
| | - Lan Cao
- Key Laboratory of Catalysis and Material Sciences of the State Ethnic Affairs Commission & Ministry of Education, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, China
| | - Changjun Yang
- Key Laboratory of Catalysis and Material Sciences of the State Ethnic Affairs Commission & Ministry of Education, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, China.
| | - Zhehui Zhang
- Key Laboratory of Catalysis and Material Sciences of the State Ethnic Affairs Commission & Ministry of Education, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, China
| | - Bingguang Zhang
- Key Laboratory of Catalysis and Material Sciences of the State Ethnic Affairs Commission & Ministry of Education, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, China
| | - Kejian Deng
- Key Laboratory of Catalysis and Material Sciences of the State Ethnic Affairs Commission & Ministry of Education, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, China.
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Arbour CA, Saraha HY, McMillan TF, Stockdill JL. Exploiting the MeDbz Linker To Generate Protected or Unprotected C-Terminally Modified Peptides. Chemistry 2017; 23:12484-12488. [PMID: 28741313 PMCID: PMC5674808 DOI: 10.1002/chem.201703380] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 07/21/2017] [Indexed: 12/15/2022]
Abstract
C-terminally modified peptides are important targets for pharmaceutical and biochemical applications. Known methods for C-terminal diversification are limited mainly in terms of the scope of accessible modifications or by epimerization of the C-terminal amino acid. In this work, we present a broadly applicable approach that enables access to a variety of C-terminally functionalized peptides in either protected or unprotected form. This chemistry proceeds without epimerization of C-terminal Ala and tolerates nucleophiles of varying nucleophilicity. Finally, unprotected peptides bearing nucleophilic side chain groups can be selectively functionalized by strong nucleophiles, whereas macrocyclization is observed for weaker nucleophiles. The potential utility of this method is demonstrated through the divergent synthesis of the conotoxin conopressin G and GLP-1(7-36) and analogs.
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Affiliation(s)
- Christine A Arbour
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - Hasina Y Saraha
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - Timothy F McMillan
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
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Klausen RS, Kennedy CR, Hyde AM, Jacobsen EN. Chiral Thioureas Promote Enantioselective Pictet-Spengler Cyclization by Stabilizing Every Intermediate and Transition State in the Carboxylic Acid-Catalyzed Reaction. J Am Chem Soc 2017; 139:12299-12309. [PMID: 28787140 PMCID: PMC5674793 DOI: 10.1021/jacs.7b06811] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [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] [Indexed: 12/22/2022]
Abstract
An investigation of the mechanism of benzoic acid/thiourea co-catalysis in the asymmetric Pictet-Spengler reaction is reported. Kinetic, computational, and structure-activity relationship studies provide evidence that rearomatization via deprotonation of the pentahydro-β-carbolinium ion intermediate by a chiral thiourea·carboxylate complex is both rate- and enantioselectivity-determining. The thiourea catalyst induces rate acceleration over the background reaction mediated by benzoic acid alone by stabilizing every intermediate and transition state leading up to and including the final selectivity-determining step. Distortion-interaction analyses of the transition structures for deprotonation predicted using density functional theory indicate that differential π-π and C-H···π interactions within a scaffold organized by multiple hydrogen bonds dictate stereoselectivity. The principles underlying rate acceleration and enantiocontrol described herein are expected to have general implications for the design of selective transformations involving deprotonation of high-energy intermediates.
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Affiliation(s)
| | - C. Rose Kennedy
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | | | - Eric N. Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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Anantharaju PG, Reddy BD, Padukudru MA, Kumari Chitturi CHM, Vimalambike MG, Madhunapantula SV. Naturally occurring benzoic acid derivatives retard cancer cell growth by inhibiting histone deacetylases (HDAC). Cancer Biol Ther 2017; 18:492-504. [PMID: 28506198 PMCID: PMC5639858 DOI: 10.1080/15384047.2017.1324374] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/18/2017] [Accepted: 04/23/2017] [Indexed: 02/07/2023] Open
Abstract
Histone deacetylases (HDACs), which modulate the expression of genes, are potential therapeutic targets in several cancers. Targeted inhibition of HDAC prevents the expression of oncogenes thereby help in the treatment of cancers. Hence, several pharmaceutical companies developed inhibitors of HDAC and tested them in preclinical models and in clinical trials. SAHA (suberanilohydroxamic acid) is one such HDAC inhibitor developed for treating breast and colorectal carcinomas. However, due to poor efficacy in clinical trials the utility of SAHA for treating cancers was discouraged. Similarly another HDAC inhibitor Trichostatin-A (TSA) also showed promising results in clinical trials but exhibited severe adverse effects, which dampened the interest of using this molecule for cancer treatment. Therefore, search for developing a potent HDAC inhibitor with minimal side effects still continues. Hence, in this study we have screened benzoic acid and benzoic acid derivatives with hydroxylic (-OH) groups and methoxy (-OCH3) groups for their efficacy to bind to the TSA binding site of HDAC using molecular docking studies. Molecules that showed much stronger affinity (than TSA) to HDAC were tested for inhibiting HDAC expressing cultured cancer cells. DHBA but not Dimethoxy Benzoic Acid (DMBA) inhibited HDAC activity, leading to cancer cell growth inhibition through the induction of ROS and cellular apoptosis mediated by Caspase-3. In addition, DHBA arrested cells in G2/M phase of the cell cycle and elevated the levels of sub-G0-G1 cell population. In summary, results of this study report that DHBA could be a strong HDAC inhibitor and inhibit cancer cell growth more effectively.
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Affiliation(s)
- Preethi G. Anantharaju
- Department of Biochemistry, Center of Excellence in Molecular Biology and Regenerative Medicine, JSS Medical College, Jagadguru Sri Shivarathreeshwara University, Mysore, Karnataka, India
| | - Bandi Deepa Reddy
- Department of Applied Microbiology, Sri Padmavati Mahila Visvavidyalayam (Women's University), Tirupati, Andhra Pradesh, India
| | - Mahesh A. Padukudru
- Department of Pulmonary Medicine, JSS Medical College, Jagadguru Sri Shivarathreeshwara University, Mysore, Karnataka, India
| | - CH. M. Kumari Chitturi
- Department of Applied Microbiology, Sri Padmavati Mahila Visvavidyalayam (Women's University), Tirupati, Andhra Pradesh, India
| | - Manjunath G. Vimalambike
- Department of Pathology, JSS Medical College, Jagadguru Sri Shivarathreeshwara University, Mysore, Karnataka, India
| | - SubbaRao V. Madhunapantula
- Department of Biochemistry, Center of Excellence in Molecular Biology and Regenerative Medicine, JSS Medical College, Jagadguru Sri Shivarathreeshwara University, Mysore, Karnataka, India
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Kong X, Dai Y, Wu G. Solid-state 17O NMR study of 2-acylbenzoic acids and warfarin. Solid State Nucl Magn Reson 2017; 84:59-64. [PMID: 28057400 DOI: 10.1016/j.ssnmr.2016.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/14/2016] [Accepted: 12/16/2016] [Indexed: 06/06/2023]
Abstract
We report synthesis and solid-state 17O NMR characterization of four site-specifically 17O-labeled 2-acylbenzoic acids (2-RC(O)C6H4COOH) where R=H and CH3): 2-[3-17O]formylbenzoic acid, 2-[1,2-17O2]formylbenzoic acid, 2-[3-17O]acetylbenzoic acid, and 2-[1,2,3-17O3]acetylbenzoic acid. In the solid state, both 2-formyl- and 2-acetyl-benzoic acids exist as the cyclic phthalide form each containing a five-membered lactone ring and a cyclic hemiacetal/hemiketal group. Static and magic-angle-spinning 17O NMR spectra were recorded at 14.1 and 21.1T for these compounds, from which the 17O chemical shift and nuclear quadrupolar coupling tensors were determined for each oxygen site. These results represent the first time that 17O NMR tensors are fully characterized for lactone, cyclic hemiacetal, and cyclic hemiketal functional groups. We also report solid-state 17O NMR data for the cyclic hemiketal group an anticoagulant drug, warfarin. Experimental 17O NMR tensors in these compounds were compared with computational results obtained with a periodic DFT code BAND.
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Affiliation(s)
- Xianqi Kong
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
| | - Yizhe Dai
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
| | - Gang Wu
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6.
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Le TXH, Nguyen TV, Amadou Yacouba Z, Zoungrana L, Avril F, Nguyen DL, Petit E, Mendret J, Bonniol V, Bechelany M, Lacour S, Lesage G, Cretin M. Correlation between degradation pathway and toxicity of acetaminophen and its by-products by using the electro-Fenton process in aqueous media. Chemosphere 2017; 172:1-9. [PMID: 28064122 DOI: 10.1016/j.chemosphere.2016.12.060] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 12/09/2016] [Accepted: 12/13/2016] [Indexed: 06/06/2023]
Abstract
The evolution of the degradation by-products of an acetaminophen (ACE) solution was monitored by HPLC-UV/MS and IC in parallel with its ecotoxicity (Vibrio fischeri 81.9%, Microtox® screening tests) during electro-Fenton (EF) oxidation performed on carbon felt. The aromatic compounds 2-hydroxy-4-(N-acetyl) aminophenol, 1,4-benzoquinone, benzaldehyde and benzoic acid were identified as toxic sub-products during the first stage of the electrochemical treatment, whereas aliphatic short-chain carboxylic acids (oxalic, maleic, oxamic, formic, acetic and fumaric acids) and inorganic ions (ammonium and nitrate) were well identified as non-toxic terminal sub-products. Electrogenerated hydroxyl radicals then converted the eco-toxic and bio-refractory property of initial ACE molecule (500 mL, 1 mM) and subsequent aromatic sub-products into non-toxic compounds after 2 h of EF treatment. The toxicity of every intermediate produced during the mineralization of ACE was quantified, and a relationship was established between the degradation pathway of ACE and the global toxicity evolution of the solution. After 8 h of treatment, a total organic carbon removal of 86.9% could be reached for 0.1 mM ACE at applied current of 500 mA with 0.2 mM of Fe2+ used as catalyst.
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Affiliation(s)
- Thi Xuan Huong Le
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France; Van Lang University, 45 Nguyen Khac Nhu, District 1, Ho Chi Minh City, Viet Nam
| | - Thi Van Nguyen
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Zoulkifli Amadou Yacouba
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Laetitia Zoungrana
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Florent Avril
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Duy Linh Nguyen
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Eddy Petit
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Julie Mendret
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Valerie Bonniol
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Mikhael Bechelany
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Stella Lacour
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France
| | - Geoffroy Lesage
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France.
| | - Marc Cretin
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F-34095, Montpellier, France.
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Wu Y, Sun Q, Wang YW, Deng CX, Yu CP. Comparative studies of aerobic and anaerobic biodegradation of methylparaben and propylparaben in activated sludge. Ecotoxicol Environ Saf 2017; 138:25-31. [PMID: 27992847 DOI: 10.1016/j.ecoenv.2016.12.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/11/2016] [Accepted: 12/14/2016] [Indexed: 05/06/2023]
Abstract
The biodegradability of two typical parabens (methylparaben and propylparaben) in activated sludge, at initial concentrations of 1mgL-1 or 10mgL-1, was investigated under aerobic and anaerobic conditions. The results showed that microorganisms played a key role in degradation of parabens in WWTPs, especially in aerobic systems. The half-lives of methylparaben and propylparaben under aerobic conditions have been estimated to range between 15.8 and 19.8min, and benzoic acid was found to be one of the major biodegradation products. The calculated biodegradation efficiency of methylparaben and propylparaben in activated sludge under aerobic conditions was significantly higher than that observed under anaerobic (nitrate, sulfate, and Fe (III) reducing) conditions, as methylparaben and propylparaben exhibited comparatively higher persistence in anaerobic systems, with half-lives ≥43.3h and ≥8.6h, respectively. Overall, the results of this study imply that the majority of these parabens can be eliminated by aerobic biodegradation during conventional wastewater treatment processes, whereas minor removal is possible in anaerobic systems if an insufficient hydraulic retention time was maintained.
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Affiliation(s)
- Yang Wu
- Department of Biology and Environmental Engineering, Hefei University, Hefei 230061, China; CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| | - Qian Sun
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Yu-Wen Wang
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Cheng-Xun Deng
- Department of Biology and Environmental Engineering, Hefei University, Hefei 230061, China
| | - Chang-Ping Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan.
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Yamagaki T, Takeuchi M, Watanabe T, Sugahara K, Takeuchi T. Mechanism for odd-electron anion generation of dihydroxybenzoic acid isomers in matrix-assisted laser desorption/ionization mass spectrometry with density functional theory calculations. Rapid Commun Mass Spectrom 2016; 30:2650-2654. [PMID: 27717166 PMCID: PMC5129581 DOI: 10.1002/rcm.7761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 09/08/2016] [Accepted: 10/02/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE Proton and radical are transferred between matrices and matrix and analyte in matrix-assisted laser desorption/ionization (MALDI) and these transfers drive ionization of analytes. The odd-electron anion [M-2H]•- was generated in dihydroxybenzoic acids (DHBs) and the ion abundance of the 2,5-DHB was the highest among six DHB isomers. We were interested in the mechanism of the ion generation of the odd-electron anion. METHODS The observed [M-2H]•- and [M-3H]- ions, which were generated with the hydrogen radical removed from the phenolic hydroxyl groups (OH) in DHB isomers, were analyzed using negative-ion MALDI-MS. The enthalpy for ion generation and their stable structures were calculated using the density functional theory (DFT) calculation program Gaussian 09 with the B3LYP functional and the 6-31+G(d) basis set. RESULTS The number of observed [M-2H]•- and [M-3H]- ions of the DHB isomers was dependent on the positions of the phenolic OH groups in the DHB isomers because the carboxy group interacts with the ortho OH group due to neighboring group participation, as confirmed from the stable structures of the [M-2H]•- anions calculated with the Gaussian 09 program. The DHB isomers were placed into three categories according to the number of the ions. CONCLUSIONS Odd-electron anions ([M-2H]•- ) and [M-2H• -H]- ([M-3H]- ) ions were generated from DHB isomers due to removal of the hydrogen radical from the phenolic groups. The enthalpy for ion generation revealed that ion formation proceeds via a two-step pathway through the [M-M]- ion as an intermediate. © 2016 The Authors. Rapid Communications in Mass Spectrometry Published by John Wiley & Sons Ltd.
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Affiliation(s)
- Tohru Yamagaki
- Suntory Foundation of Life SciencesBioorganic Research Institute8‐1‐1 Seikadai, Seika, SorakuKyoto619‐0284Japan
| | - Michika Takeuchi
- Department of Chemistry, Faculty of ScienceNara Womens' UniversityKitauoyanishi‐machiNara630‐8506Japan
| | - Takehiro Watanabe
- Suntory Foundation of Life SciencesBioorganic Research Institute8‐1‐1 Seikadai, Seika, SorakuKyoto619‐0284Japan
| | - Kohtaro Sugahara
- Suntory Foundation of Life SciencesBioorganic Research Institute8‐1‐1 Seikadai, Seika, SorakuKyoto619‐0284Japan
| | - Takae Takeuchi
- Department of Chemistry, Faculty of ScienceNara Womens' UniversityKitauoyanishi‐machiNara630‐8506Japan
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Azmat R, Moin S, Saleem A. Remediation of Cu metal-induced accelerated Fenton reaction by potato peels bio-sorbent. Environ Monit Assess 2016; 188:674. [PMID: 27853966 DOI: 10.1007/s10661-016-5670-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 10/31/2016] [Indexed: 06/06/2023]
Abstract
This article has allied exposure to Ecological Particulate Matter (EPM) and its remediation using potato peel surface (PPC) bio-sorbent on two important edible crops Spinacia oleracea and Luffa acutangula. Fenton reaction acceleration was one of the major stress oxidation reactions as a consequence of iron and copper toxicity, which involve in the formation of hydroxyl radical (OH) through EPM. Results showed that the oxidative stress encouraged by Cu in both species that recruits the degradation of photosynthetic pigments, initiating decline in growth, reduced leaf area and degrade proteins. The plants were cultivated in natural environmental condition in three pots with three replicates like (a) control, (b) Cu treated and (c) treated water. Oxidative stress initiated by metal activity in Cu accumulated plant (b) were controlled, through bio-sorption of metal from contaminated water using PPC; arranged at laboratory scale. The acceleration of Fenton reaction was verified in terms of OH radical generation. These radicals were tested in aqueous extract of leaves of three types of plants via benzoic acid. The benzoic acid acts as a scavenger of OH radical due to which the decarboxylation of benzoic acid cured. Observation on (b) showed more rapid decarboxylation as compared to other plants which showed that Cu activity was much higher in (b) as compared to (a) and (c). The rapid decarboxylation of benzoic acid and lower chlorophyll contents in (b) suggest that Fenton reaction system was much enhanced by Cu-O and Fe-O chemistry that was successfully controlled by PPC which results in restoring the metabolic pathway and nullifying oxidative stress in
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Affiliation(s)
- Rafia Azmat
- Department of Chemistry, University of Karachi, Karachi, 75270, Pakistan.
| | - Sumeira Moin
- Department of Botany, University of Karachi, Karachi, 75270, Pakistan
| | - Ailyan Saleem
- Department of Chemistry, University of Karachi, Karachi, 75270, Pakistan
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Ottanà R, Paoli P, Naß A, Lori G, Cardile V, Adornato I, Rotondo A, Graziano ACE, Wolber G, Maccari R. Discovery of 4-[(5-arylidene-4-oxothiazolidin-3-yl)methyl]benzoic acid derivatives active as novel potent allosteric inhibitors of protein tyrosine phosphatase 1B: In silico studies and in vitro evaluation as insulinomimetic and anti-inflammatory agents. Eur J Med Chem 2016; 127:840-858. [PMID: 27842892 DOI: 10.1016/j.ejmech.2016.10.063] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 09/26/2016] [Accepted: 10/30/2016] [Indexed: 12/15/2022]
Abstract
New 4-{[5-arylidene-2-(4-fluorophenylimino)-4-oxothiazolidin-3-yl]methyl}benzoic acids (5) and 2-thioxo-4-thiazolidinone analogues (6) were synthesised as a part of a continuing search for new inhibitors of protein tyrosine phosphatase 1B (PTP1B), an enzyme which is implicated in metabolic disorders and inflammatory signaling. Most of the tested compounds were shown to be potent PTP1B inhibitors. Moreover, their inhibition mechanism was markedly influenced by the substituents in the positions 2 and 5, as kinetic studies indicated. Docking experiments suggested that certain derivatives 5 and 6 may efficiently fit into an allosteric site positioned between the β-sheet including Leu71 and Lys73 and a lipophilic pocket closed by the loop consisting of Pro210 to Leu 204. In cellular assays, several of these new 4-thiazolidinone derivatives showed insulinomimetic and anti-inflammatory properties. Out of them, compound 5b exhibited the most promising profile, being able to promote the activation of both insulin receptor and downstream Akt protein as well as to increase 2-deoxyglucose cellular uptake. Interestingly, compound 5b was also able to interrupt critical events in inflammatory signaling.
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Affiliation(s)
- Rosaria Ottanà
- Department of Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, Polo Universitario dell'Annunziata, Viale SS. Annunziata, 98168 Messina, Italy
| | - Paolo Paoli
- Department of Scienze Biomediche Sperimentali e Cliniche, Sezione di Scienze Biochimiche, University of Firenze, Viale Morgagni 50, 50134 Firenze, Italy
| | - Alexandra Naß
- Institute of Pharmacy, Computer-Aided Molecular Design, Freie Universitaet Berlin, Koenigin-Luisestr. 2+4, 14195 Berlin, Germany
| | - Giulia Lori
- Department of Scienze Biomediche Sperimentali e Cliniche, Sezione di Scienze Biochimiche, University of Firenze, Viale Morgagni 50, 50134 Firenze, Italy
| | - Venera Cardile
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Via S. Sofia, 64, 95125 Catania, Italy
| | - Ilenia Adornato
- Department of Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, Polo Universitario dell'Annunziata, Viale SS. Annunziata, 98168 Messina, Italy
| | - Archimede Rotondo
- Department of Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali, Università degli Studi di Messina - sez. SASTAS - Polo Universitario dell'Annunziata, Viale SS. Annunziata, 98168 Messina, Italy
| | - Adriana Carol Eleonora Graziano
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Via S. Sofia, 64, 95125 Catania, Italy
| | - Gerhard Wolber
- Institute of Pharmacy, Computer-Aided Molecular Design, Freie Universitaet Berlin, Koenigin-Luisestr. 2+4, 14195 Berlin, Germany
| | - Rosanna Maccari
- Department of Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, Polo Universitario dell'Annunziata, Viale SS. Annunziata, 98168 Messina, Italy.
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Nieter A, Kelle S, Linke D, Berger RG. Feruloyl esterases from Schizophyllum commune to treat food industry side-streams. Bioresour Technol 2016; 220:38-46. [PMID: 27566510 DOI: 10.1016/j.biortech.2016.08.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/09/2016] [Accepted: 08/10/2016] [Indexed: 06/06/2023]
Abstract
Agro-industrial side-streams are abundant and renewable resources of hydroxycinnamic acids with potential applications as antioxidants and preservatives in the food, health, cosmetic, and pharmaceutical industries. Feruloyl esterases (FAEs) from Schizophyllum commune were functionally expressed in Pichia pastoris with extracellular activities of 6000UL(-1). The recombinant enzymes, ScFaeD1 and ScFaeD2, released ferulic acid from destarched wheat bran and sugar beet pectin. Overnight incubation of coffee pulp released caffeic (>60%), ferulic (>80%) and p-coumaric acid (100%) indicating applicability for the valorization of food processing wastes and enhanced biomass degradation. Based on substrate specificity profiling and the release of diferulates from destarched wheat bran, the recombinant FAEs were characterized as type D FAEs. ScFaeD1 and ScFaeD2 preferably hydrolyzed feruloylated saccharides with ferulic acid esterified to the O-5 position of arabinose residues and showed an unprecedented ability to hydrolyze benzoic acid esters.
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Affiliation(s)
- Annabel Nieter
- Institut für Lebensmittelchemie, Leibniz Universität Hannover, Callinstraße 5, 30167 Hannover, Germany.
| | - Sebastian Kelle
- Institut für Lebensmittelchemie, Leibniz Universität Hannover, Callinstraße 5, 30167 Hannover, Germany
| | - Diana Linke
- Institut für Lebensmittelchemie, Leibniz Universität Hannover, Callinstraße 5, 30167 Hannover, Germany
| | - Ralf G Berger
- Institut für Lebensmittelchemie, Leibniz Universität Hannover, Callinstraße 5, 30167 Hannover, Germany
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Zhou P, Liu B, Zhang J, Zhang Y, Zhang G, Wei C, Liang J, Liu Y, Zhang W. Radicals induced from peroxomonosulfate by nanoscale zero-valent copper in the acidic solution. Water Sci Technol 2016; 74:1946-1952. [PMID: 27789895 DOI: 10.2166/wst.2016.381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A highly efficient advanced oxidation process for the degradation of benzoic acid (BA) during activation of peroxomonosulfate (PMS) by nanoscale zero-valent copper (nZVC) in acidic solution is reported. BA degradation was almost completely achieved after 10 min in the nZVC/PMS process at initial pH 3.0. PMS could accelerate the corrosion of nZVC in acidic to release Cu+ which can further activate PMS to produce reactive radicals. Both sulfate radical (SO4-•) and hydroxyl radical (•OH) were considered as the primary reactive oxidant in the nZVC/PMS process with the experiments of methyl (MA) and tert-butyl alcohol quenching. Acidic condition (initial pH ≤ 3.0) facilitated BA degradation and pH is a decisive factor to affect the oxidation capacity in the nZVC/PMS process. Moreover, BA degradation in the nZVC/PMS process followed the pseudo-first-order kinetics, and BA degradation efficiency increased with the increase of the nZVC dosage.
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Affiliation(s)
- Peng Zhou
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Bei Liu
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Jing Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Yongli Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Gucheng Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Chenmo Wei
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Juan Liang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Ya Liu
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
| | - Wei Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail:
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Abstract
The interaction of benzoic acid and benzoate with model membrane systems was characterized to understand the molecular interactions of the two forms of a simple aromatic acid with the components of the membrane. The microemulsion system based on bis(2-ethylhexyl)sulfosuccinate (AOT) allowed determination of the molecular positioning using 1D NMR and 2D NMR spectroscopic methods. Benzoic acid and benzoate were both found to penetrate the membrane/water interfaces; however, the benzoic acid was able to penetrate much deeper and thus is more readily able to traverse a membrane. The Langmuir monolayer model system, using dipalmitoylphosphatidylcholine, was used as a generic membrane lipid for a cell. Compression isotherms of monolayers demonstrated a pH dependent interaction with a lipid monolayer and confirming the pH dependent observations shown in the reverse micellar model system. These studies provide an explanation for the antimicrobial activity of benzoic acid while benzoate is inactive. Furthermore, these studies form the framework upon which we are investigating the mode of bacterial uptake of pyrazinoic acid, the active form of pyrazinamide, a front line drug used to combat tuberculosis.
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Affiliation(s)
- Benjamin J Peters
- Department of Chemistry, ‡Department of Biochemistry, §Cell and Molecular Biology Program, and ∥Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University , Fort Collins, Colorado 80523, United States
| | - Allison S Groninger
- Department of Chemistry, ‡Department of Biochemistry, §Cell and Molecular Biology Program, and ∥Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University , Fort Collins, Colorado 80523, United States
| | - Fabio L Fontes
- Department of Chemistry, ‡Department of Biochemistry, §Cell and Molecular Biology Program, and ∥Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University , Fort Collins, Colorado 80523, United States
| | - Dean C Crick
- Department of Chemistry, ‡Department of Biochemistry, §Cell and Molecular Biology Program, and ∥Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University , Fort Collins, Colorado 80523, United States
| | - Debbie C Crans
- Department of Chemistry, ‡Department of Biochemistry, §Cell and Molecular Biology Program, and ∥Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University , Fort Collins, Colorado 80523, United States
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Lu Q, Sun Y, Shu Y, Tan S, Yin L, Guo Y, Tang L. HSCCC Separation of the Two Iridoid Glycosides and Three Phenolic Compounds from Veronica ciliata and Their in Vitro Antioxidant and Anti-Hepatocarcinoma Activities. Molecules 2016; 21:molecules21091234. [PMID: 27649125 PMCID: PMC6273391 DOI: 10.3390/molecules21091234] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 09/07/2016] [Accepted: 09/12/2016] [Indexed: 01/25/2023] Open
Abstract
Five main compounds, including two iridoid glycosides (catalposide, verproside) and three phenolic compounds (luteolin, 4-hydroxy benzoic acid, 3,4-dihydroxy benzoic acid), were separated and prepared from the crude extract of Veronica ciliata by high-speed countercurrent chromatography. n-Hexane/n-butanol/water (1.5:5:5, v/v/v) was used for the separation of catalposide and verproside. n-Hexane/n-butanol/water (3:2:5, v/v/v) was used for the separation of luteolin, 4-hydroxy benzoic acid and 3,4-dihydroxy benzoic acid. The head-to-tail elution mode was used with a flow rate of 5.0 mL/min and a rotary speed of 800 rpm. Finally, a total of 1.28 mg luteolin, 6 mg 4-hydroxy benzoic acid, 2 mg 3,4-dihydroxy benzoic acid, 2 mg verproside and 10 mg catalposide with purities of 98%, 99.1%, 99.5%, 99.8% and 99%, respectively, were obtained from 200 mg of crude extract. In addition, their structure was identified using MS, 1H-NMR and 13C-NMR. To the best of our knowledge, this is the first report of the separation and purification of iridoid glycosides and phenolic compounds from V. ciliata by high-speed countercurrent chromatography (HSCCC). Among these compounds, luteolin, 4-hydroxy benzoic acid and 3,4-dihydroxy benzoic acid were separated from V. ciliata Fisch. for the first time. The results of the antioxidant activity show that protocatechuic acid and luteolin have strong antioxidant activity compared to 2,6-di-tert-butyl-4-methylphenol (BHT) and vitamin C (Vc). Five compounds also exhibited strong anti-hepatocarcinoma activities.
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Affiliation(s)
- Qiuxia Lu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, China.
- National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application, Chengdu 610065, Sichuan, China.
| | - Yiran Sun
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, China.
- National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application, Chengdu 610065, Sichuan, China.
| | - Yueyue Shu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, China.
- National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application, Chengdu 610065, Sichuan, China.
| | - Shancai Tan
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, China.
- National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application, Chengdu 610065, Sichuan, China.
| | - Li Yin
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, China.
- National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application, Chengdu 610065, Sichuan, China.
| | - Yiran Guo
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, China.
- National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application, Chengdu 610065, Sichuan, China.
| | - Lin Tang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, China.
- National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application, Chengdu 610065, Sichuan, China.
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Wang Z, Fang H, Wang S. Benzoic Acid Interactions Affect Aquatic Properties and Toxicity of Copper Oxide Nanoparticles. Bull Environ Contam Toxicol 2016; 97:159-165. [PMID: 27098254 DOI: 10.1007/s00128-016-1804-9] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/12/2016] [Indexed: 06/05/2023]
Abstract
Effects of benzoic acid (BA) on physicochemical properties and ecotoxicities of CuO nanoparticles (CuONPs) in model aqueous media were studied. The CuONPs had larger hydrodynamic sizes and higher surface zeta potentials during 96 h of settling in the presence of BA than when the BA were not present. BA interaction with CuONPs is shown to promote dissolved Cu release from CuONPs in a dose-dependent manner. The contribution of free Cu(2+)-ions to growth inhibition toxicity of the CuONP suspensions at a toxicologically relevant concentration for the green alga Scenedesmus obliquus was around 22 %, indicating that dissolved fraction was not the major source of toxicity of CuONPs. The toxicity of CuONPs increased as the BA concentration increased. BA significantly altered total antioxidant capacity of CuONPs-exposed algal cells. The mechanism of the BA effect on the CuONPs toxicity may be mainly associated with degree of agglomeration, dissolved Cu, and particle-induced oxidative stress.
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Affiliation(s)
- Zhuang Wang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, People's Republic of China.
| | - Hao Fang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, People's Republic of China.
| | - Se Wang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, People's Republic of China
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Santos PSM, Domingues MRM, Duarte AC. Fenton-like oxidation of small aromatic acids from biomass burning in atmospheric water and in the absence of light: Identification of intermediates and reaction pathways. Chemosphere 2016; 154:599-603. [PMID: 27088537 DOI: 10.1016/j.chemosphere.2016.04.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/24/2016] [Accepted: 04/05/2016] [Indexed: 06/05/2023]
Abstract
A previous work showed that the night period is important for the occurrence of Fenton-like oxidation of small aromatic acids from biomass burning in atmospheric waters, which originate new chromophoric compounds apparently more complex than the precursors, although the chemical transformations involved in the process are still unknown. In this work were identified by gas chromatography-mass spectrometry (GC-MS) and by electrospray mass spectrometry (ESI-MS) the organic intermediate compounds formed during the Fenton-like oxidation of three aromatic acids from biomass burning (benzoic, 4-hydroxybenzoic and 3,5-dihydroxybenzoic acids), the same compounds evaluated in the previous study, in water and in the absence of light, which in turns allows to disclose the chemical reaction pathways involved. The oxidation intermediate compounds found for benzoic acid were 2-hydroxybenzoic, 3-hydroxybenzoic, 4-hydroxybenzoic, 2,3-dihydroxybenzoic, 2,5-dihydroxybenzoic, 2,6-dihydroxybenzoic and 3,4-dihydroxybenzoic acids. The oxidation intermediates for 4-hydroxybenzoic acid were 3,4-hydroxybenzoic acid and hydroquinone, while for 3,5-dihydroxybenzoic acid were 2,4,6-trihydroxybenzoic and 3,4,5-trihydroxybenzoic acids, and tetrahydroxybenzene. The results suggested that the hydroxylation of the three small aromatic acids is the main step of Fenton-like oxidation in atmospheric waters during the night, and that the occurrence of decarboxylation is also an important step during the oxidation of the 4-dihydroxybenzoic and 3,5-dihydroxybenzoic acids. In addition, it is important to highlight that the compounds produced are also small aromatic compounds with potential adverse effects on the environment, besides becoming available for further chemical reactions in atmospheric waters.
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Affiliation(s)
- Patrícia S M Santos
- CESAM (Centre for Environmental and Marine Studies) & Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - M Rosário M Domingues
- Mass Spectrometry Centre & QOPNA, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Armando C Duarte
- CESAM (Centre for Environmental and Marine Studies) & Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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