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Yokoe I, Kobayashi H, Kobayashi Y, Giles JT, Yoneyama K, Kitamura N, Takei M. Impact of tocilizumab on N-terminal pro-brain natriuretic peptide levels in patients with active rheumatoid arthritis without cardiac symptoms. Scand J Rheumatol 2018; 47:364-370. [DOI: 10.1080/03009742.2017.1418424] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- I Yokoe
- Division of Hematology and Rheumatology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
- Division of Rheumatology, Itabashi Chuo Medical Center, Tokyo, Japan
| | - H Kobayashi
- Division of Hematology and Rheumatology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Y Kobayashi
- Department of Advanced Biomedical Imaging Informatics, St. Marianna University School of Medicine, Kawasaki, Japan
| | - JT Giles
- Division of Rheumatology, Columbia University, College of Physicians and Surgeons, New York, USA
| | - K Yoneyama
- Department of Cardiology, St. Marianna University School of Medicine, Kawasaki, Japan
| | - N Kitamura
- Division of Hematology and Rheumatology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - M Takei
- Division of Hematology and Rheumatology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
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Kobayashi Y, Kobayashi H, Giles J, Yokoe I, Nishiwaki A, Takei M. Impact of biological treatment on left ventricular function and morphology in rheumatoid arthritis patients without cardiac symptoms, assessed by cardiac magnetic resonance imaging. Scand J Rheumatol 2017; 46:328-329. [PMID: 28276954 DOI: 10.3109/03009742.2016.1173722] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Y Kobayashi
- a Department of Advanced Biomedical Imaging Informatics , St Marianna University School of Medicine , Kawasaki , Japan
| | - H Kobayashi
- b Division of Haematology and Rheumatology, Department of Medicine , Nihon University School of Medicine , Tokyo , Japan
| | - J Giles
- c Division of Rheumatology , Columbia University College of Physicians and Surgeons , New York , NY , USA
| | - I Yokoe
- b Division of Haematology and Rheumatology, Department of Medicine , Nihon University School of Medicine , Tokyo , Japan
| | - A Nishiwaki
- b Division of Haematology and Rheumatology, Department of Medicine , Nihon University School of Medicine , Tokyo , Japan
| | - M Takei
- b Division of Haematology and Rheumatology, Department of Medicine , Nihon University School of Medicine , Tokyo , Japan
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Yokoe I, Kobayashi H, Nishiwaki A, Sugiyama K, Nagasawa Y, Karasawa H, Iwata M, Nozaki T, Ikumi N, Inomata H, Shiraiwa H, Kitamura N, Takei M. FRI0204 Effect of Tocilizumab Treatment on QTc Interval in Patients with Rheumatoid Arthritis without Cardiac Symptoms. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Osaki T, Yokoe I, Ogura S, Takahashi K, Murakami K, Inoue K, Ishizuka M, Tanaka T, Li L, Sugiyama A, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Photodynamic detection of canine mammary gland tumours after oral administration of 5-aminolevulinic acid. Vet Comp Oncol 2016; 15:731-739. [DOI: 10.1111/vco.12213] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/17/2015] [Accepted: 12/20/2015] [Indexed: 01/08/2023]
Affiliation(s)
- T. Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - I. Yokoe
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - S. Ogura
- Department of Bioengineering; Tokyo Institute of Technology; Yokohama Japan
| | | | | | - K Inoue
- SBI Pharmaceuticals Co., Ltd.; Tokyo Japan
| | | | - T. Tanaka
- SBI Pharmaceuticals Co., Ltd.; Tokyo Japan
| | - L. Li
- Department of Bio- and Material Photonics; Chitose Institute of Science and Technology; Chitose Japan
| | - A. Sugiyama
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - K. Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - Y. Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - T. Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - N. Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - T. Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - Y. Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
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Kobayashi H, Kobayashi Y, Yokoe I, Inomata H, Ikumi N, Kitamura N, Shiraiwa H, Nozaki T, Takei M. FRI0054 Left Ventricular Function and Structure in Patients with Rheumatoid Arthritis without Cardiac Symptoms: Comparison between Nonbiologic and Biologic DMARD Treatment Groups. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Inomata H, Kobayashi H, Kobayashi Y, Ikumi N, Yokoe I, Nagasawa Y, Sugiyama K, Nozaki T, Shiraiwa H, Kitamura N, Iwata M, Takei M. AB0321 IL-6 Blockade Reduces Circulating N-Terminal Pro-Brain Natriuretic Peptide Levels in Patients with Active Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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7
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Ikumi N, Inomata H, Nagasawa Y, Sugiyama K, Nozaki T, Yokoe I, Shiraiwa H, Karasawa H, Kitamura N, Iwata M, Matsukawa Y, Kobayashi H, Kobayashi Y, Takei M. FRI0437 How do we Treat Patients with Focus Score ≥1, but not Consistent with the New American College of Rheumatology Classification Criteria for SjÖGren's Syndrome? Evaluation from Study in Japanese Patients. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kobayashi H, Yokoe I, Sato H, Kobayashi Y. FRI0246 Detection of left ventricular regional dysfunction and myocardial abnormalities using complementary cardiac magnetic resonance imaging in patients with systemic sclerosis without cardiac symptoms. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kobayashi H, Yokoe I, Nishiwaki A, Sato H, Kobayashi Y. OP0313 Effect of Tocilizumab on Left Ventricular Function Assessed Using a Comprehensive Cardiac Magnetic Resonance Approach in Rheumatoid Arthritis Patients without Cardiac Symptoms. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yokoe I, Kobayashi H, Sato H, Nishiwaki A. AB0539 Comparison of RA patients in tocilizumab (TCZ) therapy who showed only DAS28(ESR) remission and both DAS28-ESR and SDAI remission. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Saito M, Atsumi T, Satoh K, Ishihara M, Iwakura I, Sakagami H, Yokoe I, Fujisawa S. Radical production and cytotoxic activity of tert-butyl-substituted phenols. In Vitr Mol Toxicol 2002; 14:53-63. [PMID: 11689156 DOI: 10.1089/109793301316882540] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
2,4,6-Tri-tert-butylphenol (TBP)-related compounds are used for stabilizing plastics by making them resistant to oxidation. However, the cytotoxic activity of these compounds has not yet been established. TBP produced phenoxyl radicals at pH >or= 9.0 and 2,4-di-t-butylphenol (DBP) at pH 12.5, but 3,3',5,5'-tetra-t-butyl-1,1'-biphenyl-2,2'-diol (bisDBP) did not, using ESR spectroscopy. Both superoxide anion radical (O(2)(-)) scavenging activity and reactive oxygen species (ROS) production activity declined in the order of TBP > DBP > bisDBP. The cytotoxic activity against human oral tumor cell lines (HSC-2, HSG) and human gingival fibroblast cells (HGF) declined in the order of DBP >> bisDBP = TBP = TBP-OOH (2,4,6-tri-t-butyl-4-hydroperoxy-2,5-cyclohexadiene-1-one). The cytotoxic activity of TBP, but not of DBP or bisDBP was significantly enhanced after visible light (VL)-irradiation for 10 min. The cytotoxicity of irradiated TBP was significantly higher than that of either original TBP or TBP-OOH, the oxidative metabolite of TBP, possibly due to the formation of TBP stable radical and ROS via oxidation. In contrast, the cytotoxic activity of DBP and bisDBP was independent of radical production, and therefore, may be intrinsic. A non-enzymatic oxidation decomposition of DBP or TBP was estimated from the formation of reaction enthalpy (DeltaH) using a modified neglect of diatomic overlap, parametric method 3 (MNDO-PM3) semi-empirical method, suggesting that O(2) is capable of activating DBP to a reactive quinone or dimer and that TBP phenoxyl radicals via oxidation directly affect extra- or intracellular bioactive materials, resulting in the induction of cytotoxicity.
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Affiliation(s)
- M Saito
- Department of Oral Diagnosis, Meikai University School of Dentistry, Sakado, Saitama, Japan
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Terasawa K, Sugita Y, Yokoe I, Fujisawa S, Sakagami H. Cytotoxic activity of 2-aminomethylene-3(2H)-benzofuranones against human oral tumor cell lines. Anticancer Res 2001; 21:3371-5. [PMID: 11848496] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
A total of 23 newly-synthesized 2-aminomethylene-3(2H)-benzofuranone and structurally-related compounds were compared for their cytotoxic activity against both normal (human gingival fibroblast HGF) and tumor cells (human oral squamous cell lines HSC-2, HSC-3 and human salivary gland tumor cells HSG). There was a significant variability of drug sensitivity among the oral tumor cell lines. In general, HSC-2 cells were the most sensitive, followed by HSG cells, while HSC-3 cells were the most resistant. HGF normal cells were highly resistant to all compounds, suggesting their tumor-specific cytotoxic action. The cytotoxic activity of the compounds with morpholine, 1-methylpiperazine or piperidine structure was generally elevated by the introduction of fluorine, but not chlorine and methoxy functional groups, to the benzofuranone structure, whereas that of compounds attached by 1-phenylpiperazine or 1-(2-pyridyl)piperazine was rather reduced. The most active compounds induced internucleosomal DNA fragmentation in human promyelocytic leukemia HL-60 cells, but not in HSG, further confirming that oral tumor cell lines are resistant to DNase digestion.
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Affiliation(s)
- K Terasawa
- Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan
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13
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Sugita Y, Hosoya H, Terasawa K, Yokoe I, Fujisawa S, Sakagami H. Cytotoxic activity of benzothiepins against human oral tumor cell lines. Anticancer Res 2001; 21:2629-32. [PMID: 11724331] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
A total of 11 newly synthesized benzothiepins and structurally-related compounds were investigated for cytotoxic activity against both normal and tumor cells. All these compounds showed higher cytotoxic activity against three human oral tumor cell lines (HSC-2, HSC-3, HSG) than against normal human gingival fibroblast (HGF), suggesting tumor-specific cytotoxic action. In general, 3,4-dihydro-1-benzothiepin-5(2H)-ones [1-6] showed higher cytotoxic activity than 2,3-dihydro-1-benzothiepins [7-11]. Compounds 4 (4-bromo-3,4-dihydro-2-(2-oxo-2-phenylethyl)-1-benzothiepin-5(2H)-one), 5 (4-bromo-3,4-dihydro-2-(2-oxopropyl)-1-benzothiepin-5(2H)-one) and 6 (4-bromo-3,4-dihydro-2-[1-(methoxycarbonyl)-1-methylethyl]-1-benzothiepin-5(2H)-one), showed higher cytotoxic activity than compounds 1, 2 and 3, respectively, which had Cl instead of Br at C-4 position. Agarose gel electrophoresis demonstrated that these compounds induced large DNA fragments in oral tumor cells, whereas they produced smear pattern of smaller DNA fragments in human promyelocytic leukemia cells HL-60. These data suggest the medicinal efficacy of benzothiepins.
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Affiliation(s)
- Y Sugita
- Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan
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14
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Fujisawa S, Atsumi T, Satoh K, Kadoma Y, Ishihara M, Okada N, Nagasaki M, Yokoe I, Sakagami H. Radical generation, radical-scavenging activity, and cytotoxicity of eugenol-related compounds. In Vitr Mol Toxicol 2001; 13:269-80. [PMID: 11319278] [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: 02/19/2023]
Abstract
To clarify the possible link between radicals and cytotoxicity of eugenol-related compounds, dimeric compounds were synthesized from eugenol (4-allyl-2-methoxy-phenol), butylated hydroxyanisole (BHA) (2-t-butyl-4-methoxyphenol) or MMP (2 methoxy-4-methylphenol); bis-EUG (3,3'-dimethoxy-5,5'-di-2-propenyl-1,1'-biphenyl-2,2'-diol), bis-BHA (3,3'-di-t-butyl-5,5'-dimethoxy-1,1'-biphenyl-2,2'-diol), and bis-MMP (3,3'-di-methoxy-5,5'-dimethyl-1,1'-biphenyl-2,2'-diol). The cytotoxic activity of these compounds was determined using a salivary gland tumor cell line (HSG), oral squamous cell carcinoma cell line (HSC-2) and human promyelocytic leukemia cell line (HL-60). A parabolic relationship between the cytotoxicity and log P (the octanol-water partition coefficient) was observed, showing that both BHA and bis-MMP, with a log P of 3-4, were the most cytotoxic. The cytotoxic activity of the 2-methoxy derivatives, eugenol, MMP and bis-MMP, against HSG cells was significantly enhanced by visible-light irradiation, possibly due to their high redox potential. Electron spin resonance (ESR) spectroscopy indicated that eugenol and BHA alone produced radicals under alkaline conditions (pH > 9.5), and eugenol most efficiently scavenges reactive oxygen species (O2-). Antioxidative reactivity of eugenol-related compounds was determined by measuring the inhibiting periods of the AIBN (2,2'-azobisisobutyronitrile)/MMA (methyl methacrylate) polymerization system, and the number of moles of peroxy radical trapped by moles of the relevant phenols (stoichiometric factor, n). It was found that the n values of eugenol and MMP were approximately 1, whereas those of BHA >2, suggesting that eugenol and MMP undergo dimerization through radical-radical couplings through quinone methides, whereas BHA undergoes the competitive interaction with poly-MMA radicals after oxidation by AIBN-peroxy radicals. BHA was an efficient peroxy radical-scavenger, but possibly reacted with polymer radicals of the lipid, thus mediating the cytotoxicity. The n value of bis-BHA was two, whereas those of bis-EUG and bis-MMP were 1.6-1.7, suggesting that the latter were further oxidized. The enthalpies of phenoxyl radical formation were determined using the semi-empirical PM3 quantum-mechanical method and the possible link to redox potential was discussed.
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Affiliation(s)
- S Fujisawa
- Department of Oral Diagnosis, Meikai University School of Dentistry, Saitama, Japan.
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15
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Abstract
The treatment of cyclopropanes having donor and acceptor substituents at the vicinal positions on the cyclopropane ring with a Lewis acid readily generates a 1,3-zwitterion, which reacted with allylsilanes to produce cycloadducts and allylic products. It was found that the yield of the cycloadduct depends on the steric demand of the alkyl substituents on the silicon atom.
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Affiliation(s)
- Y Sugita
- Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan.
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16
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Terasawa K, Sugita Y, Yokoe I, Fujisawa S, Sakagami H. Cytotoxic activity of 5-benzoylimidazole and related compounds against human oral tumor cell lines. Anticancer Res 2001; 21:1081-6. [PMID: 11396143] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
A total of 24 benzoylimidazoles and structurally-related compounds were investigated for their cytotoxic activity against oral tumor cells and normal gingival fibroblast. Compound 23 (5-(2-hydroxylbenzoyl)-2-phenylimidazole) showed the highest cytotoxic activity against both human oral tumor cell lines (human squamous cell carcinoma HSC-2, human salivary gland tumor HSG) and normal human gingival fibroblast (HGF). Compounds 7 (2-(2-hydroxybenzoyl)benz imidazo[2,1-b]thiazole), 14 (1,3-diethyl-5-(2-hydroxybenzoyl)-4-imidazoline-2-thione) and 18 (5-(2-hydroxy-4-methoxybenzoyl)-3-methyl-2-methylimino-4-thiazoline) showed slightly lower cytotoxic activity, but higher tumor-specific cytotoxic action. The cytotoxic activity of compound 23 was significantly reduced by CuCl2, but not by CoCl2, FeCl3, or by antioxidants (N-acetyl-L-cysteine, sodium ascorbate, catalase). Compound 23 did not show any detectable oxidation potential (determined by NO monitor). Agarose gel electrophoresis demonstrated that compound 23 induced DNA fragmentation in human promyelocytic leukemia cells HL-60, but not in HSG cells. These data suggested that the response to compound 23 might be different from cell to cell.
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Affiliation(s)
- K Terasawa
- Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama 350-0295, Japan
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Okada N, Satoh K, Atsumi T, Tajima M, Ishihara M, Sugita Y, Yokoe I, Sakagami H, Fujisawa S. Radical modulating activity and cytotoxic activity of synthesized eugenol-related compounds. Anticancer Res 2000; 20:2955-60. [PMID: 11062707] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The ability of nine synthetic eugenol-related compounds to scavenge O2- (generated by the hypoxanthine-xanthine oxidase reaction) was compared with their radical generation and cytotoxic activity. ESR spectroscopy showed that eugenol (4-allyl-2-methoxyphenol), 2-allyl-4-methoxyphenol, 2-allyl-4-t-butylphenol and 2,4-dimethoxyphenol efficiently scavenged O2- and produced radicals under alkaline conditions. 2-allyl-4-t-butylphenol showed the highest cytotoxic activity and DNA-synthesis inhibitory activity, possibly due to the hydrophobic radical reactivity. 2-allyl-4-methoxyphenol and 2,4-dimethoxyphenol showed higher antioxidant activity than 3-t-butyl-4-hydroxyanisol (BHA), but all these compounds showed comparable cytotoxic activity with each other. These findings suggest a possible link between the cytotoxic activity and radical generation/scavenging activity in eugenol-related compounds.
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Affiliation(s)
- N Okada
- Department of Oral Diagnosis, Meikai University School of Dentistry, Saitama, Japan
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Terasawa K, Hosoya H, Sugita Y, Yokoe I, Sakagami H. Effects of anticancer drugs, metals and antioxidants on cytotoxic activity of benzothiepins/benzoxepins. Anticancer Res 2000; 20:2951-4. [PMID: 11062706] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Among 11 benzothiepins/benzoxepins, 4-chloro-3,4-dihydro-2-(2-oxo-2-phenylethyl)-1-benzothiepin-5-(2H)-one [1] showed the highest cytotoxicity against human oral squamous cell carcinoma HSC-2 cells, followed by 2,3-dihydro-2-(2-oxopropyl)-2-phenyl-1-benzoxepin [2]. Popular antioxidants, such as N-acetyl-L-cysteine and sodium ascorbate significantly reduced the cytotoxic activity of [1] but not that of [2]. Compound [1] induced internucleosomal DNA fragmentation in human promyelocytic leukemic HL-60 cell line, but produced large DNA fragmentation in human oral tumor cell lines (HSC-2, HSG). Compounds [1] and doxorubicin additively reduced the viable cell number of HSC-2 cells. These data, taken together with their tumor specific action, demonstrate for the first time, the medicinal efficacy of benzothiepins/benzoxepins.
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Affiliation(s)
- K Terasawa
- Faculty of Pharmaceutical Sciences, Josai University, Saitama, Japan
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Atsumi T, Fujisawa S, Satoh K, Sakagami H, Iwakura I, Ueha T, Sugita Y, Yokoe I. Cytotoxicity and radical intensity of eugenol, isoeugenol or related dimers. Anticancer Res 2000; 20:2519-24. [PMID: 10953321] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
To investigate the possible link between radicals and cytotoxicity of eugenol-related compounds, dimer compounds were synthesized from eugenol (4-allyl-2-methoxyphenol) or isoeugenol (4-propenyl-2-methoxyphenol): bis-eugenol (3,3'-dimethoxy-5,5'-di-2-propenyl-1,1'-biphenyl-2,2'-diol); dehydrodiisoeugenol (2-(3-methoxy-4-hydroxyphenyl)-3-methyl-5-(1-propenyl)-7-methoxy-2,3- dihydrobenzofuran) and alpha-di-isoeugenol (r-l-ethyl-5-hydroxy-t-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-c-2- methylindane). Both the cytotoxic activity and the DNA synthesis inhibitory activity of these compounds against a salivary gland tumor cell line (HSG) and normal human gingival fibroblast (HGF) were decreased in the order of: dehydrodiisoeugenol, alpha-di-isoeugenol > isoeugenol > eugenol > bis-eugenol. Electron spin resonance (ESR) spectroscopy showed that dehydrodiisoeugenol, alpha-di-isoeugenol and eugenol, but not isoeugenol and bis-eugenol, produced phenoxyl radicals under alkaline condition (pH > 9.5). However, benzyl radicals were produced during the dimerization of isoeugenol to dehydrodiisoeugenol. The radical intensity of alpha-di- and dehydrodiisoeugenol appeared at relatively later incubation time than eugenol, suggesting that their phenoxyl radical was more stable than that of eugenol. Such a phenoxyl radical is produced by scavenging free radicals, during the inhibition of lipid peroxidation. Higher cytotoxic activity of isoeugenol dimers was thought to be induced by interaction with cell membranes via the lipophilic radical. The present study supports the notion that relative cytotoxicity of chemicals can be evaluated by measuring the radical intensity using ESR.
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Affiliation(s)
- T Atsumi
- Department of Oral Physiology, Meikai University School of Dentistry, Saitama, Japan
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Satoh K, Atsumi T, Sakagami H, Kashiwagi Y, Ida Y, Ueha T, Sugita Y, Yokoe I, Fujisawa S. Radical intensity and cytotoxicity of butylated hydroxyanisole and its orthobisphenol dimer. Anticancer Res 1999; 19:3947-52. [PMID: 10628336] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The radical intensity of BHA (4-Hydroxy-3-t-butylanisole) and its dimer (3,3'-Di-t-butyl-5,5'-dimethoxy-1,1'-biphenyl-2,2'-diol, Bis-BHA) were compared with their cytotoxic activity. ESR spectroscopy showed that BHA produced characteristic five peaks of radicals under alkaline conditions (pH > 9.5). At higher pH, BHA radical rapidly disappeared, and progressively transformed into new radical species, as detected by the splitting of the ESR signal. BHA showed higher cytotoxic activity against salivary gland tumor cell line than against normal human gingival fibroblast. On the other hand, Bis-BHA did not produce any detectable amounts of radicals at wide ranges of pH, corresponding with its weaker cytotoxic activity as compared with BHA. BHA scavenged DPPH (1,1-Diphenyl-2-picrylhydrazyl) radical and superoxide anion, more efficiently than Bis-BHA. The present study demonstrated that BHA is more cytotoxic, produces higher amounts of radicals and more efficiently scavenges various radical species, as compared with Bis-BHA. This suggests the possible link between the cytotoxic activity and radical generation/scavenging activity in BHA-derived compounds.
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Affiliation(s)
- K Satoh
- Analysis Center, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan
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Abstract
OBJECTIVES To assess the usefulness of dimerized eugenol (bis-eugenol) in dentistry, the physical properties of zinc oxide eugenol cement (ZOE) with bis-eugenol and the cytotoxicity of bis-eugenol were studied. METHODS Setting time, compressive strength, solubility and disintegration of ZOE cement with bis-eugenol according to the specifications of JDMAS315 were evaluated. The cytotoxicity of bis-eugenol and eugenol toward two different cell types, HGF (a primary culture of human gingival fibroblast) and HSG (a human epidermoid carcinoma cell line derived from a salivary gland) was evaluated by the MTT test and in terms of cell survival. RESULTS Addition of bis-eugenol to ZOE did not decrease the physical properties when employed at the ratio of 9:1 or 6:1 (liquid ND:bis-eugenol, w/w). Bis-eugenol was less toxic than eugenol in the cell culture tests. CONCLUSIONS The results of this assay demonstrated that bis-eugenol is useful in ZOE.
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Affiliation(s)
- S Fujisawa
- Department of Oral Diagnosis, Meikai University, School of Dentistry, Saitama-ken, Japan.
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22
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Satoh K, Sakagami H, Yokoe I, Kochi M, Fujisawa S. Interaction between eugenol-related compounds and radicals. Anticancer Res 1998; 18:425-8. [PMID: 9568113] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The radical modulating activity of 2-methoxy-4-(2-propenyl)phenol (eugenol), 2-t-butyl-4-methoxy-phenol (BHA), and their dimers (bis-eugenol, bis-BHA) was investigated, using ESR spectroscopy. Eugenol produced radicals in alkaline solutions, and enhanced the radical intensity of both sodium-L-ascorbate and sodium 5,6-benzylidene-L-ascorbate. BHA has similar, but slightly lower activity, and their dimers were inactive. Their ability to scavenge the superoxide anion (O2-), generated by hypoxanthine and xanthine oxidase reaction, was in the order of eugenol > bis-eugenol > BHA > bis-BHA. The relative radical intensity among these compounds was paralleled by their cytotoxic activity. The present study demonstrates that eugenol and BHA were very reactive with radicals and their reactivity was considerably reduced by dimerization. The applicability of the dimerized eugenol in dentistry was discussed.
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Affiliation(s)
- K Satoh
- Analysis Center, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan
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Muto Y, Ichikawa H, Seiki M, Shirataki Y, Yokoe I, Komatsu M. [Studies on antiulcer agents. III. Synthesis and antiulcer activity of phenylpropanol derivatives]. YAKUGAKU ZASSHI 1995; 115:307-17. [PMID: 7602497 DOI: 10.1248/yakushi1947.115.4_307] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
It was found that (+/-)ethyl 2-[2-(3-hydroxypropyl)-4-oxocyclohexylidene]-propionate (1), (+/-)ethyl 2-[2-(3-hydroxypropyl)-4,5-dimethoxyphenyl]propionate (2) and (+/-)3-[2-(3-hydroxypropyl)-4,5-dimethoxyphenyl]-2-butanone (3) had excellent antiulcer activities. In order to study structure-activity relationships, (+/-)2-[(3-hydroxypropyl)phenyl]cyclopentanone derivatives (4, 5) and (+/-)2-[(3-hydroxypropyl)phenyl]cyclopentanol derivatives (6, 7) were synthesized and tested for antiulcer activities. As a result, (+/-)2-[2-(3-hydroxypropyl)-4-methoxy-5-(2- piperidinoethoxy)phenyl]cyclopentanone (5k) exhibited potent antiulcer activities.
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Affiliation(s)
- Y Muto
- Central Research Laboratories, Zeria Pharmaceutical Co., Ltd., Saitama, Japan
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24
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Muto Y, Ichikawa H, Seiki M, Shirataki Y, Yokoe I, Komatsu M. [Studies on antiulcer agents. IV. Synthesis and antiulcer activity of phenylpropanol derivatives]. YAKUGAKU ZASSHI 1995; 115:318-28. [PMID: 7602498 DOI: 10.1248/yakushi1947.115.4_318] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
It was found that (+/-)ethyl 2-[2-(3-hydroxypropyl)-4-oxocyclohexylidene-propionate (1), (+/-)ethyl 2-[2-(3-hydroxypropyl)-4,5-dimethoxyphenyl]propionate (2), (+/-)3-[2-(3-hydroxypropyl)-4,5-dimethoxyphenyl]-2-butanone (3) and (+/-)2-[2-(3-hydroxypropyl)-4-methoxy-5-(2- piperidinoethoxy)phenyl]cyclopentanone (4) had potent antiulcer activities. In order to study structure-activity relationships, (+/-)3-[(3-hydroxypropyl)phenoxy]-2-butanone derivatives (5, 6) were synthesized and tested for antiulcer activities. Among them, (+/-)3-[2-(3-hydroxypropyl)-4-methoxy-5-[3-(4- methylpiperidino)propoxy]phenoxy]-2-butanone.3/2 oxalate (6k) was selected as a preferred antiulcer agent.
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Affiliation(s)
- Y Muto
- Central Research Laboratories, Zeria Pharmaceutical Co., Ltd., Saitama, Japan
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25
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Muto Y, Ichikawa H, Kitagawa O, Kumagai K, Watanabe M, Ogawa E, Seiki M, Shirataki Y, Yokoe I, Komatsu M. [Studies on antiulcer agents. I. The effects of various methanol and aqueous extracts of crude drugs on antiulcer activity]. YAKUGAKU ZASSHI 1994; 114:980-94. [PMID: 7869238 DOI: 10.1248/yakushi1947.114.12_980] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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: 01/27/2023]
Abstract
The antiulcer activities of 59 methanol and aqueous extracts obtained from 59 crude drugs on the ethanol-HCl-induced ulceration in rats were investigated. Among them 15 extracts were selected and they were further examined for their effects on indomethacin-, aspirin- and the water-immersion stress-induced ulcer. From these results, the methanol extract of root of Iris germanica was found to, show potent antiulcer activities. The above methanol extract was separated into 3 portions by solvent extraction, and the ether soluble portion was fractionated into 5 fractions (1 to 5) by chromatography. Fractions 4 and 5 showed significant antiulcer activities. Fraction 4 was further purified and the obtained gamma-irigermanal exhibited a potent antiulcer activity. However, further investigations are required to understand the mechanism.
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Affiliation(s)
- Y Muto
- Central Research Laboratories, Zeria Pharmaceutical Co., Ltd., Saitama, Japan
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26
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Muto Y, Ichikawa H, Seiki M, Shirataki Y, Yokoe I, Komatsu M. [Studies on antiulcer agents. II. Synthesis and antiulcer activity of phenylpropanol derivatives]. YAKUGAKU ZASSHI 1994; 114:995-1004. [PMID: 7869239 DOI: 10.1248/yakushi1947.114.12_995] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
It was found that gamma-irigermanal, obtained from the methanol extract of root of Iris germanica, exhibited a potent antiulcer activity. Therefore, this compound was selected as a lead-compound, and related compounds were synthesized and tested for antiulcer activities. It was found that (+/-) ethyl 2-[2-(3-hydroxypropyl)-4-oxocyclohexylidene]- propionate (1) had excellent antiulcer activities. Then phenylpropanol derivatives, obtained by changing from cyclohexane ring of 1 to benzene ring, were synthesized and tested for antiulcer activities in order to study structure activity relationships. As a result, (+/-) ethyl 2-[2-(3-hydroxypropyl)-4,5-dimethoxy-phenyl]propionate (2b) and (+/-) 3-[2-(3-hydroxypropyl)-4,5-dimethoxyphenyl]-2-butanone (5) were shown to have antiulcer activities.
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Affiliation(s)
- Y Muto
- Central Research Laboratories, Zeria Pharmaceutical Co., Ltd., Saitama, Japan
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27
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Nikaido T, Ohmoto T, Kinoshita T, Sankawa U, Delle Monache F, Botta B, Tomimori T, Miyaichi Y, Shirataki Y, Yokoe I. Inhibition of adenosine 3',5'-cyclic monophosphate phosphodiesterase by flavonoids. III. Chem Pharm Bull (Tokyo) 1989; 37:1392-5. [PMID: 2560949 DOI: 10.1248/cpb.37.1392] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Sixty-one flavanones, twenty-six isoflavones and eight other flavonoids, obtained from Sophora tomentosa, S. flavescens, Scutellaria baicalensis and other medicinal plants or synthesized, were tested for their inhibitory activity against adenosine 3',5'-cyclic monophosphate (cAMP) phosphodiesterase from beef heart. The structure-activity relationships were investigated.
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Komatsu M, Yokoe I, Shirataki Y. Studies on the constituents of sophora species. XIII. Constituents of the aerial parts of Sophora tomentosa L. Chem Pharm Bull (Tokyo) 1978; 26:3863-70. [PMID: 747854 DOI: 10.1248/cpb.26.3863] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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30
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Bruice TC, Chan TW, Taulane JP, Yokoe I, Elliott DL, Williams RF, Novak M. Changes in the chemistry of an isoalloxazine brought about by substitution at the 7 and 8 positions by a strongly electronegative substituent. J Am Chem Soc 1977; 99:6713-20. [PMID: 893900 DOI: 10.1021/ja00462a040] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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31
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Komatsu M, Yokoe I, Shirataki Y. [Studies on the constituents of Sophora species. X. Constituents of the root of Sophora japonica L. (author's transl)]. YAKUGAKU ZASSHI 1976; 96:254-7. [PMID: 985878 DOI: 10.1248/yakushi1947.96.2_254] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Kaneko C, Yamada S, Yokoe I. Photochemistry of pyridine 1-oxides having nitro, nitroso, or hydroxyamino group in their 4-position. Chem Pharm Bull (Tokyo) 1967; 15:356-8. [PMID: 6075494 DOI: 10.1248/cpb.15.356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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34
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Kaneko C, Yamada S, Yokoe I, Ishikawa M. Structures of the stable photo-products derived from quinoline 1-oxides and quinoxaline 1-oxides. Tetrahedron Lett 1967. [DOI: 10.1016/s0040-4039(00)90745-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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