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Nagai J, Ishikawa Y. Analysis of anticholinergic adverse effects using two large databases: The US Food and Drug Administration Adverse Event Reporting System database and the Japanese Adverse Drug Event Report database. PLoS One 2021; 16:e0260980. [PMID: 34855908 PMCID: PMC8638968 DOI: 10.1371/journal.pone.0260980] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 11/21/2021] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION Anticholinergic adverse effects (AEs) are a problem for elderly people. This study aimed to answer the following questions. First, is an analysis of anticholinergic AEs using spontaneous adverse drug event databases possible? Second, what is the main drug suspected of inducing anticholinergic AEs in the databases? Third, do database differences yield different results? METHODS We used two databases: the US Food and Drug Administration Adverse Event Reporting System database (FAERS) and the Japanese Adverse Drug Event Report database (JADER) recorded from 2004 to 2020. We defined three types of anticholinergic AEs: central nervous system (CNS) AEs, peripheral nervous system (PNS) AEs, and a combination of these AEs. We counted the number of cases and evaluated the ratio of drug-anticholinergic AE pairs between FAERS and JADER. We computed reporting odds ratios (RORs) and assessed the drugs using Beers Criteria®. RESULTS Constipation was the most reported AE in FAERS. The ratio of drug-anticholinergic AE pairs was statistically significantly larger in FAERS than JADER. Overactive bladder agents were suspected drugs common to both databases. Other drugs differed between the two databases. CNS AEs were associated with antidementia drugs in FAERS and opioids in JADER. In the assessment using Beers Criteria®, signals were detected for almost all drugs. Between the two databases, a significantly higher positive correlation was observed for PNS AEs (correlation coefficient 0.85, P = 0.0001). The ROR was significantly greater in JADER. CONCLUSIONS There are many methods to investigate AEs. This study shows that the analysis of anticholinergic AEs using spontaneous adverse drug event databases is possible. From this analysis, various suspected drugs were detected. In particular, FAERS had many cases. The differences in the results between the two databases may reflect differences in the reporting countries. Further study of the relationship between drugs and CNS AEs should be conducted.
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Affiliation(s)
- Junko Nagai
- The Office of Institutional Research, Meiji Pharmaceutical University, Kiyose, Tokyo, Japan
- * E-mail:
| | - Yoichi Ishikawa
- Division of Clinical Pharmacy, Department of Pediatric Pharmaceutical Sciences, Education and Research Center for Pharmacy, Meiji Pharmaceutical University, Kiyose, Tokyo, Japan
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2
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Kan Y, Nagai J, Uesawa Y. Evaluation of antibiotic-induced taste and smell disorders using the FDA adverse event reporting system database. Sci Rep 2021; 11:9625. [PMID: 33953272 PMCID: PMC8100100 DOI: 10.1038/s41598-021-88958-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 04/20/2021] [Indexed: 02/04/2023] Open
Abstract
Adverse effects can occur owing to anorexia, which can reduce treatment compliance and worsen the patients overall condition. One such side effect, namely drug-induced taste and smell disorders, reduces patients quality of life. Although antibiotics can cause taste and smell disorders, a few studies have examined antibiotic-induced taste and smell disorders. Therefore, this study comprehensively analyzed the relationship between taste and smell disorders and antibiotic usage. The side effects of antibiotics were investigated using the FDA Adverse Event Reporting System database (FAERS). The reporting odds ratios between the listed drugs and taste and smell disorders P values were comprehensively calculated. Adjusted odds ratios were calculated to account for patient background. Furthermore, to clarify the feature of this adverse effect, shape parameters indicating the expression pattern were calculated. Signals that induced taste and smell disorders were detected for six antibiotics, including drugs for which this event is not described in the package insert in Japan. Multiple logistic regression analysis suggested an association of taste and smell disorders with gender, hypertension, mental disorder, and cancer. The median time to onset of antibiotic-induced taste and smell disorders was 2–5 days. Six antibiotics could be analyzed, and four of these drugs matched those with detected signals. Our study supported previous findings on gender and age. Furthermore, antibiotic-induced taste and smell disorders are likely to develop in the early stage of treatment. For these reasons, it is important to remember the risk of developing of taste and smell disorders when administering antibiotics. In addition, it is recommended that the patient be monitored carefully for at least 1 week before initiating treatment, and the patients course should be followed for at least 2 months.
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Affiliation(s)
- Yusuke Kan
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, 204-8588, Japan.,Nanohana Pharmacy, Tokyo, 196-0014, Japan
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, 204-8588, Japan
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, 204-8588, Japan.
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3
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Teratani M, Nakamura S, Sakagami H, Fujise M, Hashimoto M, Okudaira N, Bandow K, Iijima Y, Nagai J, Uesawa Y, Wakabayashi H. Antitumor Effects and Tumor-specificity of Guaiazulene-3-Carboxylate Derivatives Against Oral Squamous Cell Carcinoma In Vitro. Anticancer Res 2020; 40:4885-4894. [PMID: 32878776 DOI: 10.21873/anticanres.14491] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 06/07/2020] [Accepted: 06/24/2020] [Indexed: 11/10/2022]
Abstract
AIM The aim of this study was to investigate the antitumor potential of guaiazulene-3-carboxylate derivatives against oral malignant cells. MATERIALS AND METHODS Twelve guaiazulene-3-carboxylate derivatives were synthesized by introduction of either with alkyl group [1-5], alkoxy group [6, 7], hydroxyl group [8, 9] or primary amine [10-12] at the end of sidechains. Tumor-specificity (TS) was calculated by the ratio of mean 50% cytotoxic concentration (CC50) against 3 human oral mesenchymal cell lines to that against 4 human oral squamous cell carcinoma (OSCC) cell lines. Potency-selectivity expression (PSE) was calculated by dividing TS value by CC50value against OSCC cell lines. Cell cycle analysis was performed by cell sorter. RESULTS [6, 7] showed the highest TS and PSE values, and induced the accumulation of both subG1 and G2/M cell populations in HSC-2 OSCC cells. Quantitative structure-activity relationship analysis demonstrated that their tumor-specificity was correlated with chemical descriptors that explain the 3D shape, electric state and ionization potential. CONCLUSION Alkoxyl guaiazulene-3-carboxylates [6, 7] can be potential candidates of lead compound for developing novel anticancer drugs.
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Affiliation(s)
| | | | - Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), Saitama, Japan
| | | | | | - Noriyuki Okudaira
- Department of Biochemistry, Teikyo University School of Medicine, Tokyo, Japan
| | - Kenjiro Bandow
- Division of Biochemistry, Meikai University School of Dentistry, Saitama, Japan
| | - Yosuke Iijima
- Department of Oral and Maxillofacial Surgery, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
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Sugita Y, Takao K, Uesawa Y, Nagai J, Iijima Y, Sano M, Sakagami H. Development of Newly Synthesized Chromone Derivatives with High Tumor Specificity against Human Oral Squamous Cell Carcinoma. Medicines (Basel) 2020; 7:E50. [PMID: 32858984 PMCID: PMC7555025 DOI: 10.3390/medicines7090050] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 08/23/2020] [Accepted: 08/24/2020] [Indexed: 12/13/2022]
Abstract
Since many anticancer drugs show severe adverse effects such as mucositis, peripheral neurotoxicity, and extravasation, it was crucial to explore new compounds with much reduced adverse effects. Comprehensive investigation with human malignant and nonmalignant cells demonstrated that derivatives of chromone, back-bone structure of flavonoid, showed much higher tumor specificity as compared with three major polyphenols in the natural kingdom, such as lignin-carbohydrate complex, tannin, and flavonoid. A total 291 newly synthesized compounds of 17 groups (consisting of 12 chromones, 2 esters, and 3 amides) gave a wide range of the intensity of tumor specificity, possibly reflecting the fitness for the optimal 3D structure and electric state. Among them, 7-methoxy-3-[(1E)-2-phenylethenyl]-4H-1-benzopyran-4-one (compound 22), which belongs to 3-styrylchromones, showed the highest tumor specificity. 22 induced subG1 and G2 + M cell population in human oral squamous cell carcinoma cell line, with much less keratinocyte toxicity as compared with doxorubicin and 5-FU. However, 12 active compounds selected did not necessarily induce apoptosis and mitotic arrest. This compound can be used as a lead compound to manufacture more active compound.
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Affiliation(s)
- Yoshiaki Sugita
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Saitama 350-0295, Japan
| | - Koichi Takao
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Saitama 350-0295, Japan
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo 204-858, Japan
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo 204-858, Japan
| | - Yosuke Iijima
- Department of Oral and Maxillofacial Surgery, Saitama Medical Center, Saitama Medical University, Kawagoe 350-8550, Japan
| | - Motohiko Sano
- Division of Applied Pharmaceutical Education and Research, Hoshi University, Tokyo 142-8501, Japan
| | - Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan
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Usami Y, Higuchi M, Mizuki K, Yamamoto M, Kanki M, Nakasone C, Sugimoto Y, Shibano M, Uesawa Y, Nagai J, Yoneyama H, Harusawa S. Syntheses and Glycosidase Inhibitory Activities, and in Silico Docking Studies of Pericosine E Analogs Methoxy-Substituted at C6. Mar Drugs 2020; 18:E221. [PMID: 32326065 PMCID: PMC7230162 DOI: 10.3390/md18040221] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/15/2020] [Accepted: 04/17/2020] [Indexed: 12/14/2022] Open
Abstract
Inspired by the significant -glucosidase inhibitory activities of (+)- and (-)-pericosine E, we herein designed and synthesized 16 analogs of these marine natural products bearing a methoxy group instead of a chlorine atom at C6. Four of these compounds exhibited moderate -glucosidase inhibitory activities, which were weaker than those of the corresponding chlorine-containing species. The four compounds could be prepared by coupling reactions utilizing the (-)-pericosine B moiety. An additional in silico docking simulation suggested that the reason of reduced activity of the C6-methoxylated analogs might be an absence of hydrogen bonding between a methoxy group with the surrounding amino acid residues in the active site in -glucosidase.
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Affiliation(s)
- Yoshihide Usami
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Megumi Higuchi
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Koji Mizuki
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Mizuki Yamamoto
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Mao Kanki
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Chika Nakasone
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Yuya Sugimoto
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Makio Shibano
- Department of Natural Products Research, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan;
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan; (Y.U.); (J.N.)
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan; (Y.U.); (J.N.)
| | - Hiroki Yoneyama
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Shinya Harusawa
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
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Takao K, Hoshi K, Sakagami H, Shi H, Bandow K, Nagai J, Uesawa Y, Tomomura A, Tomomura M, Sugita Y. Further Quantitative Structure-Cytotoxicity Relationship Analysis of 3-Styrylchromones. Anticancer Res 2020; 40:87-95. [PMID: 31892556 DOI: 10.21873/anticanres.13929] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 11/26/2019] [Accepted: 12/02/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Very few studies are available about the biological activity of 3-styrylchromones. Our previous study demonstrated the importance of methoxy group at 6-position of the chromone ring and hydroxyl group at 4'-position of phenyl group in styryl moiety. As a sequel of this study, we synthesized fourteen compounds that include eight 3-styrylchromones where methoxy group was introduced at 7-position of chromone rings, and then evaluated their tumor-specificity. MATERIALS AND METHODS Tumor-specificity (TS) was calculated by relative cytotoxicity against human oral squamous cell carcinoma cell lines versus human normal oral cells. Apoptosis induction and growth arrest were monitored by cell-cycle analysis. Quantitative structure-activity relationship analysis of TS was performed with 3,167 chemical descriptors. RESULTS AND DISCUSSION Two compounds, 7-methoxy-3-[(1E)-2-phenylethenyl]-4H-1-benzopyran-4-one [7] and 3-[(1E)-2-(4-hydroxyphenyl)ethenyl]-7-methoxy-4H-1-benzopyran-4-one [14] showed higher tumor-specificity than doxorubicin and 5-FU, suggesting the importance of methoxy group in 7-position of the chromone ring. These compounds induced the apoptosis and mitotic arrest in HSC-2 cells. The tumor-specificity of 3-styrylchromone derivatives were most correlated with descriptors for molecule shape and electronic charge. The present study suggested that modification by introducing methoxy group at 7-position, instead at 6-position, further increased the tumor-specificity of 3-styrylchromone.
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Affiliation(s)
- Koichi Takao
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Saitama, Japan
| | - Kaori Hoshi
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Saitama, Japan
| | - Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), Saitama, Japan
| | - Haixia Shi
- Meikai University Research Institute of Odontology (M-RIO), Saitama, Japan.,Shanghai Ninth People's Hospital, Shanghai Jiatong University School of Medicine, Shanghai, P.R. China
| | - Kenjiro Bandow
- Division of Biochemistry, Meikai University School of Dentistry, Saitama, Japan
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
| | - Akito Tomomura
- Division of Biochemistry, Meikai University School of Dentistry, Saitama, Japan
| | - Mineko Tomomura
- Department of Oral Health Sciences, Meikai University School of Sciences, Chiba, Japan
| | - Yoshiaki Sugita
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Saitama, Japan
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Nagai J, Shi H, Sezaki N, Yoshida N, Bandow K, Uesawa Y, Sakagami H, Tomomura M, Tomomura A, Takao K, Sugita Y. Quantitative Structure-Cytotoxicity Relationship of 2-Arylazolylchromones and 2-Triazolylchromones. Anticancer Res 2019; 39:6479-6488. [PMID: 31810912 DOI: 10.21873/anticanres.13862] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Revised: 11/05/2019] [Accepted: 11/06/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM 4H-1-Benzopyran-4-one (chromone), present in various flavonoids as a backbone structure, has been used for the synthesis of anticancer drugs. The study aimed at investigating the cytotoxicity of eight 2-arylazolylchromones and twelve 2-triazolylchromones against four human oral squamous cell carcinoma (OSCC) cell lines and three human normal mesenchymal oral cells, and then performed a quantitative structure-activity relationship (QSAR) analysis. MATERIALS AND METHODS Cell viability was determined by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method. The distribution of cells to various phases of cell cycle was determined by cell cycle analysis. A total of 3,218 physicochemical, structural and quantum chemical features were calculated for QSAR analysis from the most stabilized structure optimized using CORINA. RESULTS 2-[4-(4-fluorophenyl)-1H-imidazol-1-yl]-4H-1-benzopyran-4-one [6] had the highest tumor-specificity (TS), comparable with that of 5-flurouracil (5-FU) and doxorubicin, inducing cytostatic growth inhibition, accumulation of G2+M phase cells with no cells in the G1 phase. All eight 2-triazolylchromones showed much lower tumor-specificity, confirming our previous finding. Tumor-specificity was also correlated with 3D shape, topological shape, size, ionization potential, and the presence of more than two aromatic rings in the molecule and imidazole ring in the nitrogen-containing heterocyclic ring. CONCLUSION [6] can be a lead compound for designing anticancer drugs.
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Affiliation(s)
- Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
| | - Haixia Shi
- Shanghai Ninth People's Hospital, Shanghai Jiatong University School of Medicine, Shanghai, P.R. China.,Meikai University Research Institute of Odontology, Sakado, Japan
| | - Natsuko Sezaki
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado, Japan
| | - Nao Yoshida
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado, Japan
| | - Kenjiro Bandow
- Division of Biochemistry, Meikai University School of Dentistry, Sakado, Japan
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
| | - Hiroshi Sakagami
- Shanghai Ninth People's Hospital, Shanghai Jiatong University School of Medicine, Shanghai, P.R. China
| | - Mineko Tomomura
- Department of Oral Health Sciences, Meikai University, Urayasu, Japan
| | - Akito Tomomura
- Division of Biochemistry, Meikai University School of Dentistry, Sakado, Japan
| | - Koichi Takao
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado, Japan
| | - Yoshiaki Sugita
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado, Japan
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Takao K, Endo S, Nagai J, Kamauchi H, Takemura Y, Uesawa Y, Sugita Y. 2-Styrylchromone derivatives as potent and selective monoamine oxidase B inhibitors. Bioorg Chem 2019; 92:103285. [PMID: 31561103 DOI: 10.1016/j.bioorg.2019.103285] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/28/2019] [Accepted: 09/15/2019] [Indexed: 12/14/2022]
Abstract
A series of eighteen 2-styrylchromone derivatives (see Chart 1) were synthesized and evaluated for their monoamine oxidase (MAO) A and B inhibitory activities. Many of the derivatives inhibited MAO-B comparable to pargyline (a positive control), and most of them inhibited MAO-B selectively. Of the eighteen derivatives, compound 9 having methoxy group at R1 and chlorine at R4 showed both the best MAO-B inhibitory activity (IC50 = 17 ± 2.4 nM) and the best MAO-B selectivity (IC50 for MAO-A/IC50 for MAO-B = 1500). The mode of inhibition of compound 9 against MAO-B was competitive and reversible. Quantitative structure-activity relationship (QSAR) analyses of the 2-styrylchromone derivatives were conducted using their pIC50 values with the use of Molecular Operating Environment (MOE) and Dragon, demonstrating that the descriptors of MAO-B inhibitory activity and MAO-B selectivity were 1734 and 121, respectively, that showed significant correlations (P < 0.05). We then examined the 2-styrylchromone structures as useful scaffolds through three-dimensional-QSAR studies using AutoGPA, which is based on the molecular field analysis algorithm using MOE. The model using pIC50 value indexes for MAO-B exhibited a determination coefficient (R2) of 0.873 as well as a Leave-One-Out cross-validated determination coefficient (Q2) of 0.675. These data suggested that the 2-styrylchromone structure might be a useful scaffold for the design and development of novel MAO-B inhibitors.
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Affiliation(s)
- Koichi Takao
- Laboratory of Bioorganic Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyaki-dai, Sakado, Saitama 350-0295, Japan.
| | - Saki Endo
- Laboratory of Bioorganic Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyaki-dai, Sakado, Saitama 350-0295, Japan
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Hitoshi Kamauchi
- Laboratory of Bioorganic Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyaki-dai, Sakado, Saitama 350-0295, Japan
| | - Yuri Takemura
- Laboratory of Bioorganic Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyaki-dai, Sakado, Saitama 350-0295, Japan
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Yoshiaki Sugita
- Laboratory of Bioorganic Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyaki-dai, Sakado, Saitama 350-0295, Japan
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Imanari K, Hashimoto M, Wakabayashi H, Okudaira N, Bandow K, Nagai J, Tomomura M, Tomomura A, Uesawa Y, Sakagami H. Quantitative Structure-Cytotoxicity Relationship of Azulene Amide Derivatives. Anticancer Res 2019; 39:3507-3518. [PMID: 31262875 DOI: 10.21873/anticanres.13497] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/12/2019] [Accepted: 04/15/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Very few studies of anticancer activity of azulene amides led us to investigate the cytotoxicity of 21 N-alkylazulene-1-carboxamides introduced either with 3-methyl [1-7], 7-isopropyl-3-methyl [8-14] or 2-methoxy group [15-21] Materials and Methods: Tumor-specificity (TS) was calculated by the ratio of mean 50% cytotoxic concentration (CC50) against three normal human oral mesenchymal cells to that against four human oral squamous cell carcinoma (OSCC) cell lines. Potency-selectivity expression (PSE) was calculated by dividing TS value by CC50 value against OSCC cell lines. Apoptosis-inducing activity was evaluated by caspase-3 activation and appearance of subG1 cell population. RESULTS [8-14] showed higher TS and PSE values, than [1-7] and [15-21] The most active compound [8-14] induced apoptosis in C9-22 OSCC cells at 4-times higher CC50 Quantitative structure-activity relationship analysis of [1-14] demonstrated that their tumor-specificity was correlated with chemical descriptors that explain the molecular shape and hydrophobicity. CONCLUSION 7-Isopropyl-3-methyl-N-propylazulene-1-carboxamide [8] can be a potential candidate of lead compound for manufacturing new anticancer drug.
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Affiliation(s)
- Kana Imanari
- Faculty of Science, Josai University, Sakado, Japan
| | | | | | - Noriyuki Okudaira
- Division of Pharmacology, Meikai University School of Dentistry, Sakado, Japan
| | - Kenjiro Bandow
- Division of Biochemistry, Meikai University School of Dentistry, Sakado, Japan
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
| | - Mineko Tomomura
- Division of Biochemistry, Meikai University School of Dentistry, Sakado, Japan
| | - Akito Tomomura
- Division of Biochemistry, Meikai University School of Dentistry, Sakado, Japan
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, Tokyo, Japan
| | - Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), Meikai University School of Dentistry, Sakado, Japan
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10
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Nagai J, Imamura M, Sakagami H, Uesawa Y. QSAR Prediction Model to Search for Compounds with Selective Cytotoxicity Against Oral Cell Cancer. Medicines (Basel) 2019; 6:medicines6020045. [PMID: 30939759 PMCID: PMC6631777 DOI: 10.3390/medicines6020045] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/25/2019] [Accepted: 03/26/2019] [Indexed: 01/24/2023]
Abstract
Background: Anticancer drugs often have strong toxicity against tumours and normal cells. Some natural products demonstrate high tumour specificity. We have previously reported the cytotoxic activity and tumour specificity of various chemical compounds. In this study, we constructed a database of previously reported compound data and predictive models to screen a new anticancer drug. Methods: We collected compound data from our previous studies and built a database for analysis. Using this database, we constructed models that could predict cytotoxicity and tumour specificity using random forest method. The prediction performance was evaluated using an external validation set. Results: A total of 494 compounds were collected, and these activities and chemical structure data were merged as database for analysis. The structure-toxicity relationship prediction model showed higher prediction accuracy than the tumour selectivity prediction model. Descriptors with high contribution differed for tumour and normal cells. Conclusions: Further study is required to construct a tumour selective toxicity prediction model with higher predictive accuracy. Such a model is expected to contribute to the screening of candidate compounds for new anticancer drugs.
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Affiliation(s)
- Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
| | - Mai Imamura
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
| | - Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan.
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
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Sakagami H, Watanabe T, Hoshino T, Suda N, Mori K, Yasui T, Yamauchi N, Kashiwagi H, Gomi T, Oizumi T, Nagai J, Uesawa Y, Takao K, Sugita Y. Recent Progress of Basic Studies of Natural Products and Their Dental Application. Medicines (Basel) 2018; 6:medicines6010004. [PMID: 30585249 PMCID: PMC6473826 DOI: 10.3390/medicines6010004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/10/2018] [Accepted: 12/19/2018] [Indexed: 12/14/2022]
Abstract
The present article reviews the research progress of three major polyphenols (tannins, flavonoids and lignin carbohydrate complexes), chromone (backbone structure of flavonoids) and herbal extracts. Chemical modified chromone derivatives showed highly specific toxicity against human oral squamous cell carcinoma cell lines, with much lower toxicity against human oral keratinocytes, as compared with various anticancer drugs. QSAR analysis suggests the possible correlation between their tumor-specificity and three-dimensional molecular shape. Condensed tannins in the tea extracts inactivated the glucosyltransferase enzymes, involved in the biofilm formation. Lignin-carbohydrate complexes (prepared by alkaline extraction and acid-precipitation) and crude alkaline extract of the leaves of Sasa species (SE, available as an over-the-counter drug) showed much higher anti-HIV activity, than tannins, flavonoids and Japanese traditional medicine (Kampo). Long-term treatment with SE and several Kampo medicines showed an anti-inflammatory and anti-oxidant effects in small size of clinical trials. Although the anti-periodontitis activity of synthetic angiotensin II blockers has been suggested in many papers, natural angiotensin II blockers has not yet been tested for their possible anti-periodontitis activity. There should be still many unknown substances that are useful for treating the oral diseases in the natural kingdom.
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Affiliation(s)
- Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan.
| | - Taihei Watanabe
- Division of Pediatric Dentistry, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan.
| | - Tomonori Hoshino
- Division of Pediatric Dentistry, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan.
| | - Naoto Suda
- Division of Orthodontics, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan.
| | - Kazumasa Mori
- Division of First Oral and Maxillofacial Surgery, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan.
| | - Toshikazu Yasui
- Division of Oral Health, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan.
| | - Naoki Yamauchi
- Masuko Memorial Hospital, 35-28 Takehashi-cho, Nakamura-ku, Nagoya 453-8566, Japan.
| | - Harutsugu Kashiwagi
- Ecopale Co., Ltd., 885 Minamiisshiki, Nagaizumi-cho, Suntou-gun, Shizuoka 411-0932, Japan.
| | - Tsuneaki Gomi
- Gomi clinic, 1-10-12 Hyakunin-cho, Shinjuku-ku, Tokyo 169-0073, Japan.
| | - Takaaki Oizumi
- Daiwa Biological Research Institute Co., Ltd., 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan.
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
| | - Koichi Takao
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado, Saitama 350-0295, Japan.
| | - Yoshiaki Sugita
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado, Saitama 350-0295, Japan.
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12
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Affiliation(s)
- Junko Nagai
- Department of Clinical Pharmaceutics, Meiji Pharmaceutical University,
| | - Hajime Kagaya
- Department of Clinical Pharmaceutics, Meiji Pharmaceutical University,
| | - Yoshihiro Uesawa
- Department of Clinical Pharmaceutics, Meiji Pharmaceutical University,
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Yamada T, Yamakawa F, Cao X, Fukui A, Tajitsu M, Nagai J, Yambe Y, Murase T, Saito M, Tsuzuki T. Conservative Treatment for Idiopathic Adrenal Hemorrhage Tracked by a Long-term Series of CT Images. Intern Med 2017; 56:673-676. [PMID: 28321068 PMCID: PMC5410478 DOI: 10.2169/internalmedicine.56.7685] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
A 55-year-old man was transported to our hospital after a sudden onset of left lower abdominal pain while driving. Computed tomography (CT) of the abdominal region revealed an extensive iso-intense signal region that had a maximum area of 14×15 cm, which we treated conservatively. A series of follow-up CT images showed the gradual decrease of the left peritoneal mass, while continuity with the left adrenal gland became apparent. He was diagnosed with idiopathic adrenal hemorrhage. Adrenal hemorrhage presenting with huge retroperitoneal tumors is rare, and most cases are treated surgically. Therefore, CT images with conservative treatment are rare, holding both clinical interest and significance.
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Affiliation(s)
- Tsutomu Yamada
- Department of Endocrinology and Diabetes, National Hospital Organization, Nagoya Medical Center, Japan
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14
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Tajitsu M, Yamada T, Cao X, Fukui A, Nagai J, Yambe Y, Murase T, Okada H. Osmotic demyelination syndrome complicating diabetes with anti-glutamic acid decarboxylase antibodies and Graves' disease: A case report. J Diabetes Investig 2016; 7:130-1. [PMID: 26816611 PMCID: PMC4718098 DOI: 10.1111/jdi.12377] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 05/11/2015] [Accepted: 05/12/2015] [Indexed: 11/29/2022] Open
Abstract
ODS associated with hyperglycemia is rare, with few reports.Immune responses have been recently reported as a mechanism of ODS onset. In the present case, an autoimmune predisposition may have contributed to ODS pathogenesis.
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Affiliation(s)
- Machiko Tajitsu
- Department of Endocrinology and Diabetes National Hospital Organization Nagoya Medical Center Nagoya Japan
| | - Tsutomu Yamada
- Department of Endocrinology and Diabetes National Hospital Organization Nagoya Medical Center Nagoya Japan
| | - Xia Cao
- Department of Endocrinology and Diabetes National Hospital Organization Nagoya Medical Center Nagoya Japan
| | - Ayako Fukui
- Department of Endocrinology and Diabetes National Hospital Organization Nagoya Medical Center Nagoya Japan
| | - Junko Nagai
- Department of Endocrinology and Diabetes National Hospital Organization Nagoya Medical Center Nagoya Japan
| | - Yuko Yambe
- Department of Endocrinology and Diabetes National Hospital Organization Nagoya Medical Center Nagoya Japan
| | - Takashi Murase
- Department of Endocrinology and Diabetes National Hospital Organization Nagoya Medical Center Nagoya Japan
| | - Hisashi Okada
- Department of Neurology National Hospital Organization Nagoya Medical Center Nagoya Japan
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15
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Nagai J, Yamada T, Cao X, Fukui A, Tajitsu M, Yamakawa F, Yambe Y, Murase T, Watanabe M, Shimada F. Cranial magnetic resonance imaging and angiography findings in a patient with hyperglycemic hemichorea-hemiballism. J Clin Endocrinol Metab 2015; 100:11-2. [PMID: 25313912 DOI: 10.1210/jc.2014-2576] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Junko Nagai
- Departments of Endocrinology and Diabetes (J.N., T.Y., X.C., A.F., M.T., F.Y., Y.Y., T.M.), and Neurology (M.W., F.S.), National Hospital Organization, Nagoya Medical Center, 4-1-1 Sannomaru, Naka-ku, Nagoya, Japan
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16
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Takano M, Kakizoe S, Kawami M, Nagai J, Patanasethnont D, Sripanidkulchai B, Yumoto R. Modulation of P-glycoprotein function and multidrug resistance in cancer cells by Thai plant extracts. Pharmazie 2014; 69:823-828. [PMID: 25985578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The effects of ethanol extracts from Thai plants belonging to the families of Annonaceae, Rutaceae, and Zingiberaceae on P-glycoprotein (P-gp) function and multidrug resistance were examined in paclitaxel-resistant HepG2 (PR-HepG2) cells. All the extracts tested, significantly increased the accumulation of [3H]paclitaxel, a P-gp substrate, in the cells. Among nine extracts, Z01 and Z02, extracts from Curcuma comosa and Kaempferia marginata (Zingiberaceae family), respectively, potently increased the accumulation. In addition, Z01 and Z02 increased the accumulation of other P-gp substrates, rhodamine 123 and doxorubicin, in PR-HepG2 cells in a concentration-dependent manner. Increased accumulation of rhodamine 123 and doxorubicin by Z01 and Z02 was also confirmed by confocal laser scanning microscopy. The effect of Z01 and Z02 pretreatment on the expression of MDR1 mRNA was also examined. The expression of MDR1 mRNA was not affected by the treatment of PR-HepG2 cells with these extracts for 48 hours. Cytotoxicity of paclitaxel was examined by XTT and protein assays in the absence and presence of Z02. Z02 potentiated the cytotoxicity of paclitaxel in PR-HepG2 cells. These results suggest that Curcuma comosa and Kaempferia marginata belonging to Zingiberaceae are useful sources to search for new P-gp modulator(s) that can be used to overcome multidrug resistance of cancer cells.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B/biosynthesis
- ATP Binding Cassette Transporter, Subfamily B/genetics
- ATP Binding Cassette Transporter, Subfamily B, Member 1/drug effects
- ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism
- Antibiotics, Antineoplastic/metabolism
- Antineoplastic Agents, Phytogenic/pharmacology
- Cell Line, Tumor
- Doxorubicin/metabolism
- Drug Resistance, Multiple/drug effects
- Drug Resistance, Neoplasm/drug effects
- Hep G2 Cells
- Humans
- Paclitaxel/metabolism
- Paclitaxel/pharmacology
- Plant Extracts/pharmacology
- Plants, Medicinal/chemistry
- Thailand
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17
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Miyabe Y, Miyabe C, Iwai Y, Takayasu A, Fukuda S, Yokoyama W, Nagai J, Jona M, Tokuhara Y, Ohkawa R, Albers HM, Ovaa H, Aoki J, Chun J, Yatomi Y, Ueda H, Miyasaka M, Miyasaka N, Nanki T. THU0106 Lysophosphatidic Acid Receptor LPA1 is Essential for Development of Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.634] [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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18
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You B, Pond G, Siu L, Nagai J, Cheiken R, Chen E. Heterogeneity among lists of cautioned or prohibited drugs in protocols of early-phase oncology trials. Ann Oncol 2012; 23:1633-9. [DOI: 10.1093/annonc/mdr476] [Citation(s) in RCA: 4] [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: 11/14/2022] Open
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19
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Nagai J, Lin CY, Sabour P. Selection for increased adult body weight in mouse lines with and without the rat growth hormone transgene. J Anim Breed Genet 2011; 110:374-84. [DOI: 10.1111/j.1439-0388.1993.tb00750.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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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20
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21
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Nagai J, Sabour MP, Lin CY. Lifetime reproduction and parturition intervals in mice with and without the rat growth-hormone transgene. J Anim Breed Genet 2011. [DOI: 10.1111/j.1439-0388.1996.tb00602.x] [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: 11/28/2022]
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22
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Chen EX, Pond GR, Siu LL, Cheiken RA, Nagai J, You B. Inconsistencies among lists of cautioned/prohibited drugs in oncology phase I and phase II trials. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13084] [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: 11/20/2022] Open
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23
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Kitabatake M, Nagai J, Abe K, Tsuchiya Y, Ogawa K, Yokoyama T, Mohri K, Taguchi K, Horiguchi Y. Facile synthesis and in vitro properties of 1-alkyl- and 1-alkyl-N-propargyl-1,2,3,4-tetrahydroisoquinoline derivatives on PC12 cells. Eur J Med Chem 2009; 44:4034-43. [DOI: 10.1016/j.ejmech.2009.04.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 04/18/2009] [Accepted: 04/23/2009] [Indexed: 11/30/2022]
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24
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Murakami S, Nagai J, Fujii K, Yumoto R, Takano M. Influences of dosage regimen and co-administration of low-molecular weight proteins and basic peptides on renal accumulation of arbekacin in mice. J Antimicrob Chemother 2008; 61:658-64. [DOI: 10.1093/jac/dkm512] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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25
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Hedley D, Moore MJ, Hirte H, Siu L, Vincent M, Jonker D, Mwang H, Nagai J, Dancey J. A phase II trial of perifosine as second line therapy for advanced pancreatic cancer. A study of the Princess Margaret Hospital [PMH] Phase II Consortium. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.4166] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- D. Hedley
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - M. J. Moore
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - H. Hirte
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - L. Siu
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - M. Vincent
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - D. Jonker
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - H. Mwang
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - J. Nagai
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
| | - J. Dancey
- Princess Margaret Hosp, Toronto, ON, Canada; NCI-CTEP, Bethesda, MD
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26
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Nagai J, Christensen EI, Morris SM, Willnow TE, Cooper JA, Nielsen R. Mutually dependent localization of megalin and Dab2 in the renal proximal tubule. Am J Physiol Renal Physiol 2005; 289:F569-76. [PMID: 15870384 DOI: 10.1152/ajprenal.00292.2004] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [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: 11/22/2022] Open
Abstract
Disabled-2 (Dab2) is a cytoplasmic adaptor protein that binds to the cytoplasmic tail of the multiligand endocytic receptor megalin, abundantly expressed in renal proximal tubules. Deletion of Dab2 induces a urinary increase in specific plasma proteins such as vitamin D binding protein and retinol binding protein (Morris SM, Tallquist MD, Rock CO, and Cooper JA. EMBO J 21: 1555-1564, 2002). However, the subcellular localization of Dab2 in the renal proximal tubule and its function have not been fully elucidated yet. Here, we report the characterization of Dab2 in the renal proximal tubule. Immunohistocytochemistry revealed colocalization with megalin in coated pits and vesicles but not in dense apical tubules and the brush border. Kidney-specific megalin knockout almost abolished Dab2 staining, indicating that Dab2 subcellular localization requires megalin in the proximal tubule. Reciprocally, knockout of Dab2 led to a redistribution of megalin from endosomes to microvilli. In addition, there was an overall decrease in levels of megalin protein observed by immunoblotting but no decrease in clathrin or alpha-adaptin protein levels or in megalin mRNA. In rat yolk sac epithelial BN16 cells, Dab2 was present apically and colocalized with megalin. Introduction of anti-Dab2 antibody into BN16 cells decreased the internalization of 125I-labeled receptor-associated protein, substantiating the role of Dab2 in megalin-mediated endocytosis. The present study shows that Dab2 is localized in the apical endocytic apparatus of the renal proximal tubule and that this localization requires megalin. Furthermore, the study suggests that the urinary loss of megalin ligands observed in Dab2 knockout mice is caused by suboptimal trafficking of megalin, leading to decreased megalin levels.
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Affiliation(s)
- J Nagai
- Cell Biology, Institute of Anatomy, Univ. of Aarhus, University Park, Bldg. 234, DK-8000 Aarhus C, Denmark
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Abstract
The transport of prostaglandin E(1) (PGE(1)) across the blood-brain barrier (BBB) was characterized using an in-situ rat brain perfusion technique. The uptake of [(3)H]PGE(1) was not affected by shortchain monocarboxylic acids (butyric acid and valeric acid). On the other hand, uptake of [(3)H]PGE(1) was significantly inhibited by medium-chain monocarboxylic acids such as hexanoic acid, enanthic acid and octanoic acid. These medium-chain monocarboxylic acids showed a more potent inhibitory effect on [(3)H]PGE(1) uptake with increasing number of carbon atoms. In contrast, there was no decrease in [(3)H]PGE(1) transport by any dicarboxylic acids with 5-8 carbon atoms. Valproic acid decreased [(3)H]PGE(1) uptake, whereas p-aminohippuric acid, a substrate for the organic anion transporter family, did not inhibit [(3)H]PGE(1) transport. Bromocresol green, an inhibitor of prostaglandin transporter (PGT), strongly decreased [(3)H]PGE(1) transport across the BBB. In addition, digoxin and taurocholate, substrates for organic anion transporting polypeptide subtype 2 (Oatp2), significantly inhibited [(3)H]PGE(1) uptake. RT-PCR analysis revealed that PGT mRNA and Oatp2 mRNA are expressed in a capillary-rich fraction from rat brain. Thus, it is suggested that PGE(1) transport across the BBB is mediated by some specific transport systems, possibly by the members of the Oatp family.
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Affiliation(s)
- T Taogoshi
- Department of Pharmaceutics and Therapeutics, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
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28
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Iizawa Y, Nagai J, Ishikawa T, Hashiguchi S, Nakao M, Miyake A, Okonogi K. In vitro antimicrobial activity of T-91825, a novel anti-MRSA cephalosporin, and in vivo anti-MRSA activity of its prodrug, TAK-599. J Infect Chemother 2004; 10:146-56. [PMID: 15290453 DOI: 10.1007/s10156-004-0309-3] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2003] [Accepted: 02/16/2004] [Indexed: 11/29/2022]
Abstract
TAK-599 is a water-soluble prodrug of a cephalosporin compound, T-91825. In vitro and in vivo antibacterial activities of T-91825 and TAK-599, respectively, were examined. T-91825 was active against both gram-positive and gram-negative bacteria, unlike vancomycin and linezolid, which are inactive against gram-negative bacteria. The 90% minimum inhibitory concentration of T-91825 against clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA) was 2 micro g/ml. This activity was comparable to those of vancomycin, linezolid, teicoplanin, and arbekacin. T-91825 was similarly active against vancomycin-intermediate S. aureus. In a time-kill study, T-91825 showed more rapid and distinct decrease of viable cells of two MRSA strains than did vancomycin and linezolid in vitro. The effect of TAK-599 against systemic infection caused by clinical isolates of MRSA in mice was comparable or superior to that of vancomycin, linezolid, teicoplanin, and arbekacin. In addition, TAK-599 at a dose of 20 mg/kg significantly decreased bacterial counts in lungs of mice in an experimental pneumonia model caused by MRSA in which vancomycin and linezolid were totally ineffective at the same dose. These results suggest the usefulness of TAK-599 in the treatment of MRSA infections in humans.
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Affiliation(s)
- Yuji Iizawa
- Pharmacology Research Laboratories I, Pharmaceutical Research Division, Takeda Chemical Industries, Ltd., 2-17-85 Jusohonmachi, Yodogawa-ku, 532-8686, Osaka, Japan.
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29
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Ito M, Okui H, Nakagawa H, Mio S, Kinoshita A, Obayashi T, Miura T, Nagai J, Yokoi S, Ichinose R, Tanaka K, Kodama S, Iwasaki T, Miyake T, Takashio M, Iwabuchi J. Synthesis and insecticidal activity of novel N-oxydihydropyrrole derivatives with a substituted spirocyclohexyl group. Biosci Biotechnol Biochem 2003; 67:1230-8. [PMID: 12843647 DOI: 10.1271/bbb.67.1230] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A series of 5-spirocyclohexyl-3-(2,6-dimethylphenyl)-1,5-dihydro-2H-pyrrol-2-one derivatives (3) with various substituents on the spirocyclohexyl ring was synthesized and evaluated for its insecticidal activity against the aphid, Myzus persicae. Substituents at the 1- and 4-positions of the dihydropyrrole ring were also varied to optimize the activity. An investigation of the structure-activity relationship revealed that methoxy, alkoxyalkoxy, ethylenedioxy and methoxyimino groups were favorable as substituents at the 4-position of the spirocyclohexyl ring. The activity was optimized by the respective substitution of a methoxy or methoxymethoxy moiety and cyclopropylcarbonyloxy group at the 1- and 4-positions of the dihydropyrrole ring.
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Affiliation(s)
- Mitsuru Ito
- Agroscience Research Laboratories, Sankyo Agro Co. Ltd., 1041 Yasu, Yasu-cho, Yasu-gun, Shiga 520-2342, USA.
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30
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Shimada Y, Nishimura M, Kakinuma S, Ogiu T, Fujimoto H, Kubo A, Nagai J, Kobayash K, Tano K, Yoshinaga S, Bhakat KK. Genetic susceptibility to thymic lymphomas and K-ras gene mutation in mice after exposure to X-rays and N-ethyl-N-nitrosourea. Int J Radiat Biol 2003; 79:423-30. [PMID: 12963544 DOI: 10.1080/0955300031000139371] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [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: 10/26/2022]
Abstract
PURPOSE Ras activation is one of the major mechanisms for the development of murine thymic lymphomas by radiation and chemical carcinogens. To gain insight into the relationship between genetic susceptibility and ras gene mutation, the frequency and spectrum of ras gene mutation was examined in thymic lymphomas from susceptible and resistant mice. MATERIALS AND METHODS K- and N-ras mutations in thymic lymphomas that arose in X-ray-irradiated and N-ethyl-N-nitrosourea (ENU)-treated mice of susceptible C57BL/6, rather resistant C3H and their hybrid B6C3F1 were analysed by polymerase chain reaction-single-strand conformation polymorphism and subsequent DNA sequencing. RESULTS C57BL/6 exhibited a higher incidence of thymic lymphomas after exposure to X-rays and ENU than C3H, with B6C3F1 being intermediate. K-ras gene mutations occurred frequently in the pathogenesis of ENU-induced thymic lymphomas in susceptible C57BL/6 as opposed to resistant C3H. The ras mutations were more frequent in ENU-induced thymic lymphomas than X-ray-induced thymic lymphomas, and with the latter, there was no clear evidence for strain differences, suggesting that the genetic susceptibility to X-rays was independent of ras activation. The mutations of K-ras in thymic lymphomas from C57BL/6 were predominantly GGT to GAT in codon 12, whereas this mutation type was never found in those from C3H. No strain difference was observed in the nucleotide sequence or expression levels of O(6)-alkylguanine alkyltransferase, indicating that this enzyme did not account for the genetic susceptibility to ras activation. CONCLUSIONS The results indicate that there is a clear strain and carcinogen dependency of K-ras mutation and that the frequency of ras mutation might determine the genetic susceptibility to ENU-induced lymphomagenesis, whereas pathways independent of ras activation might determine the susceptibility to X-ray-induced lymphomagenesis.
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Affiliation(s)
- Y Shimada
- Low Dose Radiation Effect Project, National Institute of Radiological Sciences, Inage-ku, Chiba 263-8555, Japan.
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31
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Ito M, Okui H, Nakagawa H, Mio S, Kinoshita A, Obayashi T, Miura T, Nagai J, Yokoi S, Ichinose R, Tanaka K, Kodama S, Iwasaki T, Miyake T, Takashio M, Iwabuchi J. Synthesis and insecticidal activity of novel N-oxydihydropyrroles: 4-hydroxy-3-mesityl-1-methoxymethoxy derivatives with various substituents at the 5-position. Bioorg Med Chem 2003; 11:761-8. [PMID: 12538006 DOI: 10.1016/s0968-0896(02)00474-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This paper reports the synthesis and insecticidal activity of a series of novel 4-hydroxy-3-mesityl-1-methoxymethoxy-1,5-dihydro-2H-pyrrol-2-one derivatives, in which the substituents at the 5-position were varied with a number of alkyl and spirocycloalkyl groups. Investigation of the structure-activity relationships revealed that small alkyl and spirocyclohexyl groups had a favorable effect on the insecticidal activity of these agents against Myzus persicae.
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Affiliation(s)
- Mitsuru Ito
- Agroscience Research Laboratories, Sankyo Co., Ltd., 1041 Yasu, Yasu-cho, Yasu-gun, Shiga 520-2342, Japan.
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32
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Ito M, Okui H, Nakagawa H, Mio S, Kinoshita A, Obayashi T, Miura T, Nagai J, Yokoi S, Ichinose R, Tanaka K, Kodama S, Iwasaki T, Miyake T, Takashio M, Iwabuchi J. Synthesis and insecticidal activity of novel dihydropyrrole derivatives with N-sulfanyl, sulfinyl, and sulfonyl moieties. Bioorg Med Chem 2003; 11:489-94. [PMID: 12538013 DOI: 10.1016/s0968-0896(02)00476-5] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This paper reports the synthesis and insecticidal activity of a new type of dihydropyrrole derivatives with sulfur moieties such as sulfanyl, sulfinyl, and sulfonyl groups at the 1-position. These derivatives exhibited high insecticidal potency against Nilaparvata lugens and Nephotettix cincticeps. Investigation of the structure-activity relationships revealed that the alkoxycarbonyloxy groups at the 4-position tended to increase the systemic insecticidal activity.
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Affiliation(s)
- Mitsuru Ito
- Agroscience Research Laboratories, Sankyo Co., Ltd., 1041 Yasu, Yasu-cho, Yasu-gun, 520-2342, Shiga, Japan.
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33
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Ito M, Okui H, Nakagawa H, Mio S, Kinoshita A, Obayashi T, Miura T, Nagai J, Yokoi S, Ichinose R, Tanaka K, Kodama S, Iwasaki T, Miyake T, Takashio M, Iwabuchi J. Synthesis and insecticidal activity of N-oxydihydropyrroles: 4-hydroxy-3-mesityl-5,5-dimethyl derivatives with various substituents at the 1-position. Biosci Biotechnol Biochem 2002; 66:2406-14. [PMID: 12506980 DOI: 10.1271/bbb.66.2406] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A new series of N-oxydihydropyrrole derivatives was synthesized and evaluated for insecticidal activity against Nilaparvata lugens and Myzus persicae. Various substituents were introduced to the 1-position of the dihydropyrrole ring, and the derivatives obtained exhibited systemic and/or contact insecticidal activity. The structure-activity relationship revealed that small alkyoxy and alkoxyalkoxy groups were more favorable than alkylcarbonyloxy, alkoxycarbonyloxy, or sulfonyloxy groups as substituents at the 1-position.
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Affiliation(s)
- Mitsuru Ito
- Agroscience Research Laboratories, Crop Protection Company, Sankyo Co. Ltd., 1041 Yasu, Yasu-cho, Yasu-gun, Shiga 520-2342, Japan.
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34
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Murakami T, Yumoto R, Nagai J, Takano M. Factors affecting the expression and function of P-glycoprotein in rats: drug treatments and diseased states. Pharmazie 2002; 57:102-7. [PMID: 11878184] [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: 02/24/2023]
Abstract
The expression and function of P-glycoprotein (P-gp), an ATP-dependent efflux pump, were examined in rats pretreated with dexamethasone (DEX), an inducer of P-gp, and in rats with glycerol-induced acute renal failure (ARF) and with CCl4-induced acute hepatic failure (AHF). DEX pretreatment increased the P-gp level and its functional activity in the intestine. In contrast, in ARF and AHF rats, the in vivo P-gp function was systemically suppressed, even though the level of P-gp remained unchanged or rather increased. In Caco-2 cells, the plasma collected from diseased rats exhibited a greater inhibitory effect on P-gp function than did plasma from control rats. A higher-plasma level of corticosterone, an endogenous P-gp substrate/inhibitor, was observed in the disease rats. These findings indicate that the actual in vivo function of P-gp cannot be predicted merely from the expression level of P-gp, and suggest that some endogenous P-gp-related compounds such as corticosterone participate in the regulation of in vivo P-gp function in diseased states.
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Affiliation(s)
- T Murakami
- Institute of Pharmaceutical Sciences, Faculty of Medicine, Hiroshima University, Hiroshima, Japan
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35
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Kato K, Kato Y, Ijiri R, Misugi K, Nanba I, Nagai J, Nagahara N, Kigasawa H, Toyoda Y, Nishi T, Tanaka Y. Ewing's sarcoma family of tumor arising in the adrenal gland--possible diagnostic pitfall in pediatric pathology: histologic, immunohistochemical, ultrastructural, and molecular study. Hum Pathol 2001; 32:1012-6. [PMID: 11567233 DOI: 10.1053/hupa.2001.27121] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We present an adrenal Ewing's sarcoma family of tumor (ESFT) arising in an 11-year-old Japanese boy. Although intensive chemoradiotherapy and radical surgery were performed, the patient died of obstinate disease 1 year and 3 months after the initial presentation. The primary site (adrenal gland) with radiologic findings (with foci of calcification), high titer of serum neuron specific enolase, and sheets of monotonous primitive rounded cells on histology mostly favored neuroblastoma. However, a diagnosis of ESFT was confirmed by immunohistochemical profile, including MIC2-positivity and molecular study disclosing EWS-FLI1 chimera gene verified by direct sequencing. Recognition of adrenal ESFT and use of newly developed diagnostic techniques are required for differential diagnosis of undifferentiated small round cell tumor of the adrenal gland.
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Affiliation(s)
- K Kato
- Division of Pathology, Kanagawa Children's Medical Center, Yokohama, Japan
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36
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Soma R, Murakami H, Hayashi J, Ito S, Nagai J, Sugita M, Kuno S, Okada M. The effects of cytoplasmic transfer of mtDNA in relation to whole-body endurance performance. Jpn J Physiol 2001; 51:475-80. [PMID: 11564284 DOI: 10.2170/jjphysiol.51.475] [Citation(s) in RCA: 5] [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: 11/05/2022]
Abstract
The purpose of this study was to examine the relation between whole-body aerobic capacity and mitochondrial facilities. The mitochondrial enzyme system of oxidative phosphorylation (OXPHOS) is encoded both by mitochondrial DNA (mtDNA) and nuclear DNA. To identify the effect of mtDNA on whole-body aerobic capacity, we fused the platelets of the study subjects that contained mtDNA but that lacked nuclear DNA with rho(0) HeLa cells, which lacked mtDNA, and isolated repopulated cybrids. The mitochondrial respiratory functions of the cybrids, estimated from cell oxygen consumption and cytochrome-c oxidase (CCOX), were compared between endurance athletes and sedentary controls. The oxygen consumption was 18.5 +/- 3.9 and 18.2 +/- 4.1 nmol/min/ml/10(7) cells in athletes and controls, respectively. The CCOX activity was 98.8 +/- 17.5 and 116.7 +/- 9.8%, compared with fibroblasts in athletes and controls, respectively. No significant difference was noted between groups in either cell oxygen consumption or CCOX activity. These results show that the OXPHOS enzymes coded by mtDNA do not strongly influence whole-body aerobic fitness.
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Affiliation(s)
- R Soma
- Foundation for Advancement of International Science, Tsukuba, 305-0062, Japan.
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37
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Abstract
The role of megalin in tissue distribution of aminoglycosides was examined in normal rats and maleate-treated rats that shed megalin from the renal brush-border membrane. In normal rats, amikacin administered intravenously accumulated most abundantly in the renal cortex, followed by the renal medulla. No amikacin was detected in other tissues. Tissue distributions of amikacin were well correlated with megalin levels in each tissue. Bolus administration of gentamicin increased urinary excretion of megalin ligands (vitamin D binding protein and calcium), suggesting the competition between gentamicin and these megalin ligands in renal tubules. Ligand blotting showed that binding of (45)Ca(2+) to megalin was inhibited by aminoglycosides. Both megalin levels and amikacin accumulation in renal cortex were decreased by maleate injection. Then, amikacin accumulation recovered proportionate to megalin levels. These findings suggest that megalin is involved in the renal cortical accumulation of aminoglycosides in vivo. In addition, the interaction between aminoglycosides and calcium in the kidney may be due to the competition among these compounds to bind to megalin.
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Affiliation(s)
- J Nagai
- Institute of Pharmaceutical Sciences, Faculty of Medicine, Hiroshima University, Hiroshima 734-8551, Japan
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38
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Huang ZH, Murakami T, Okochi A, Yumoyo R, Nagai J, Takano M. Expression and function of P-glycoprotein in rats with carbon tetrachloride-induced acute hepatic failure. J Pharm Pharmacol 2001; 53:873-81. [PMID: 11428664 DOI: 10.1211/0022357011776036] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [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: 10/31/2022]
Abstract
Acute hepatic failure was induced experimentally in rats by intraperitoneal injection of 2.5 mL kg(-1) carbon tetrachloride (CCl4), and the effects on the expression and function of P-glycoprotein in the liver, kidney and brain were evaluated. The CCl4 injection significantly increased the indicators of hepatic function (glutamate oxaloacetate transaminase, glutamate pyruvate transaminase), but not of renal function (blood urea nitrogen, glomerular filtration rate). In rats with acute hepatic failure, the hepatic P-glycoprotein concentration increased 1.5-fold and the ATP concentration decreased to approximately 40% that in control rats. In contrast, P-glycoprotein concentrations in the kidney and brain and ATP concentrations in the kidney remained unchanged. The in-vivo P-glycoprotein function in these tissues was suppressed as evaluated by biliary and renal secretory clearances and brain distribution of rhodamine 123, a P-glycoprotein substrate. These findings suggest that factors other than P-glycoprotein concentration are involved in the systemic suppression of P-glycoprotein function in diseased rats. In Caco-2 cells, plasma collected from CCl4-treated rats exhibited a greater inhibitory effect on P-glycoprotein-mediated transport of rhodamine 123 than that from control rats, suggesting the accumulation of an endogenous P-glycoprotein substrate/inhibitor in the plasma of diseased rats. In fact, the plasma concentration of corticosterone, an endogenous P-glycoprotein substrate, increased 2-fold in CCl4-treated rats compared with control rats. It was demonstrated that P-glycoprotein function is systemically suppressed in rats with CCl4-induced acute hepatic failure, not only in the target organ (liver), but also in other organs (kidney and brain), although the P-glycoprotein concentration remained unchanged in the kidney and brain, and increased in the liver. In the systemic suppression of the P-glycoprotein function in the diseased state, the alteration of plasma concentrations or components of endogenous P-glycoprotein-related compounds, such as corticosterone, would likely be involved.
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Affiliation(s)
- Z H Huang
- Institute of Pharmaceutical Sciences, Faculty of Medicine, Hiroshima University, Japan
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39
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Sasaki Y, Nagai J, Kitahara Y, Takai N, Murakami T, Takano M. Expression of chloride channel, ClC-5, and its role in receptor-mediated endocytosis of albumin in OK cells. Biochem Biophys Res Commun 2001; 282:212-8. [PMID: 11263994 DOI: 10.1006/bbrc.2001.4557] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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: 11/22/2022]
Abstract
By using Western blot and RT-PCR analyses, the expression of ClC-5, a member of the ClC family of voltage-gated chloride channels, and its mRNA was detected in OK cells. The effect of chloride channel inhibitors on receptor-mediated endocytosis of albumin was examined in OK cells and compared to that of vacuolar H(+)-ATPase inhibitors. Accumulation of fluorescein-isothiocyanate (FITC)-albumin, a receptor-mediated endocytosis marker, was inhibited by 5-nitro-2-(3-phenylpropylamino)-benzoic acid (NPPB), a chloride channel inhibitor, in a concentration-dependent fashion. In contrast, uptake of FITC-inulin, a fluid-phase endocytosis marker, was not affected by NPPB. Other chloride channel inhibitors, 4,4'-diisothiocyanatostilbene-2-2'-disulfonic acid and diphenylamine-2-carboxylic acid, also inhibited FITC-albumin uptake. NPPB, as well as a vacuolar H(+)-ATPase inhibitor bafilomycin A(1), caused a decrease in the affinity and in the maximal velocity of FITC-albumin uptake. These results suggest that chloride channel, most likely ClC-5, plays an important role in the receptor-mediated endocytosis of albumin in OK cells.
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Affiliation(s)
- Y Sasaki
- Institute of Pharmaceutical Sciences, Faculty of Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
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40
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Yumoto R, Murakami T, Sanemasa M, Nasu R, Nagai J, Takano M. Pharmacokinetic interaction of cytochrome P450 3A-related compounds with rhodamine 123, a P-glycoprotein substrate, in rats pretreated with dexamethasone. Drug Metab Dispos 2001; 29:145-51. [PMID: 11159804] [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] Open
Abstract
The effect of pretreatment with dexamethasone (DEX) on drug-drug interactions between rhodamine 123 (Rho123), a P-glycoprotein (P-gp) substrate, and midazolam, a cytochrome P450 (CYP) 3A substrate, or verapamil, a P-gp/CYP3A substrate, was studied in rats. Rats were pretreated with DEX (100 mg/kg/day, oral) for 2 days. Western blot analysis with a monoclonal antibody for P-gp, C219, revealed that DEX pretreatment increased P-gp level in the intestine 1.9-fold, but not in the liver. In vitro metabolism study of erythromycin in microsomal suspensions indicated the 9.7-fold increase of CYP3A activity in the liver, but not in the intestine, by DEX pretreatment. In an in vivo study, DEX pretreatment increased P-gp-mediated exsorption clearance of Rho123 from blood to the intestinal lumen approximately 2-fold, but not biliary clearances, in good agreement with the results of Western blot analysis. In untreated rats, midazolam (100 microM) or verapamil (30 or 100 microM) added in the intestinal perfusate (single perfusion) decreased the exsorption clearance and biliary clearance of Rho123 by approximately 30 to 50%. In DEX-pretreated rats, however, the inhibitory potency of midazolam in the liver significantly decreased compared with that in untreated rats, although the potency in the intestine did not change. The inhibitory potency of verapamil decreased both in the intestine and liver by DEX pretreatment. In conclusion, it was demonstrated that DEX pretreatment affects not only P-gp-mediated disposition of Rho123 but also pharmacokinetic interactions of P-gp/CYP3A-related compounds with Rho123, probably because concentrations of substrates/inhibitors at target sites such as the intestine and liver are varied.
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Affiliation(s)
- R Yumoto
- Institute of Pharmaceutical Sciences, Faculty of Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
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41
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Nagai J, Yokosawa K, Takano Y. [Does negative priming occur by rotated characters?]. Shinrigaku Kenkyu 2000; 71:395-402. [PMID: 11247285 DOI: 10.4992/jjpsy.71.395] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We conducted three experiments in order to investigate the effect of stimulus orientation on negative priming (NP). Using the picture naming task, Murray (1995) reported the occurrence of semantic NP by rotated distractors. As the rotation of picture stimuli seems to have little effect to reduce distractor interference, in the present study we used the character (katakana) identification task to ensure the effect of stimulus rotation. When the distractors were rotated (180 degrees), no NP was observed whether the targets were upright (Experiment 1) or rotated (Experiment 2). On the other hand, significant NP was observed when the distractors were upright and the targets were rotated (Experiment 3). These results suggest that the inhibitory mechanism of attention may not operate on the rotated distractor characters.
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Affiliation(s)
- J Nagai
- Department of Psychology, Graduate School of Humanities and Sociology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033
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42
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Huang ZH, Murakami T, Okochi A, Yumoto R, Nagai J, Takano M. Expression and function of P-glycoprotein in rats with glycerol-induced acute renal failure. Eur J Pharmacol 2000; 406:453-60. [PMID: 11040353 DOI: 10.1016/s0014-2999(00)00699-3] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.9] [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: 11/23/2022]
Abstract
The effect of glycerol-induced acute renal failure on P-glycoprotein expression and function was evaluated in rats. The in vivo function of P-glycoprotein was evaluated by measuring renal secretory and biliary clearance and brain distribution of rhodamine 123 (Rho-123), a P-glycoprotein substrate, under a steady-state plasma concentration. In acute renal failure rats, the P-glycoprotein level increased 2.5-fold in the kidney, but not in the liver and brain. In contrast, P-glycoprotein function in these tissues was suppressed. Interestingly, not only the renal but also the biliary clearance of Rho-123 was correlated with the glomerular filtration rate. In Caco-2 cells, plasma from renal failure rats exhibited a greater inhibitory effect on P-glycoprotein-mediated transport of Rho-123 than did plasma from control rats. In conclusion, P-glycoprotein function was systemically suppressed in acute renal failure, even though the level of P-glycoprotein remained unchanged or rather increased. This may be due to the accumulation of some endogenous P-glycoprotein substrates/modulators in the plasma in disease states.
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Affiliation(s)
- Z H Huang
- Institute of Pharmaceutical Sciences, Faculty of Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, 734-8551, Hiroshima, Japan
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Abstract
The effect of the potent anticancer drug cisplatin, cis-diamminedichloroplatinum (II) (CDDP), on H+ -ATPase and Na+/H+ exchanger in rat renal brush-border membrane was examined. To measure H+ transport by vacuolar H+ -ATPase in renal brush-border membrane vesicles, we employed a detergent-dilution procedure, which can reorientate the catalytic domain of H+ -ATPase from an inward-facing configuration to outward-facing one. ATP-driven H+ pump activity decreased markedly in brush-border membrane prepared from rats two days after CDDP administration (5 mg/kg, i.p.). In addition, N-ethylmaleimide and bafilomycin A1 (inhibitors of vacuolar H+ -ATPase)-sensitive ATPase activity also decreased in these rats. The decrease in ATP-driven H+ pump activity was observed even at day 7 after the administration of CDDP. Suppression of ATP-driven H+ pump activity was also observed when brush-border membrane vesicles prepared from normal rats were pretreated with CDDP in vitro. In contrast with H+ -ATPase, the activity of Na+/H+ exchanger, which was determined by measuring acridine orange fluorescence quenching, was not affected by the administration of CDDP. These results provide new insights into CDDP-induced renal tubular dysfunctions, especially such as proximal tubular acidosis and proteinuria.
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Affiliation(s)
- Y Shiraishi
- Institute of Pharmaceutical Sciences, Faculty of Medicine, Hiroshima University, Japan
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44
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Mizobata T, Kawagoe M, Hongo K, Nagai J, Kawata Y. Refolding of target proteins from a "rigid" mutant chaperonin demonstrates a minimal mechanism of chaperonin binding and release. J Biol Chem 2000; 275:25600-7. [PMID: 10837467 DOI: 10.1074/jbc.m000795200] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
One of the most interesting facets of GroEL-facilitated protein folding lies in the fact that the requirement for a successful folding reaction of a given protein target depends upon the refolding conditions used. In this report, we utilize a mutant of GroEL (GroEL T89W) whose domain movements have been drastically restricted, producing a chaperonin that is incapable of utilizing the conventional cyclic mechanism of chaperonin action. This mutant was, however, still capable of improving the refolding yield of lactate dehydrogenase in the absence of both GroES and ATP hydrolysis. A very rapid interconversion of conformations was detected in the mutant immediately after ATP binding, and this interconversion was inferred to form part of the target release mechanism in this mutant. The possibility exists that some target proteins, although dependent on GroEL for improved refolding yields, are capable of refolding successfully by utilizing only portions of the entire mechanism provided by the chaperonins.
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Affiliation(s)
- T Mizobata
- Department of Biotechnology, Faculty of Engineering, Tottori University, Japan
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Mizobata T, Kagawa M, Murakoshi N, Kusaka E, Kameo K, Kawata Y, Nagai J. Overproduction of Thermus sp. YS 8-13 manganese catalase in Escherichia coli production of soluble apoenzyme and in vitro formation of active holoenzyme. Eur J Biochem 2000; 267:4264-71. [PMID: 10866831 DOI: 10.1046/j.1432-1033.2000.01474.x] [Citation(s) in RCA: 6] [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: 11/20/2022]
Abstract
Overproduction of Thermus sp. YS 8-13 manganese catalase in Escherichia coli BL21(DE3) was accomplished by introducing a derivative of pET-23a(+) containing a copy of the coding gene into the multicloning site. E. coli BL21(DE3)/pETMNCAT produced abundant quantities of manganese catalase as insoluble inclusion bodies. Regeneration of active catalase was achieved by denaturation in guanidine hydrochloride and subsequent dialysis in the presence of manganese ion. When the E. coli chaperone genes GroEL, GroES, DnaK, DnaJ and GrpE were coexpressed with manganese catalase, a significant fraction of the overproduced protein was partitioned into the soluble fraction. However, almost all of the soluble enzyme was isolated in a manganese-deficient apo form which could subsequently be converted into active holoenzyme by incubation with manganese ion at high temperatures. Further experiments on this apo catalase suggested that the structure of this protein was virtually identical to the active holoenzyme.
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Affiliation(s)
- T Mizobata
- Department of Biotechnology, Faculty of Engineering, Tottori University, Japan.
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46
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Kawata Y, Tamura K, Kawamura M, Ikei K, Mizobata T, Nagai J, Fujita M, Yano S, Tokushige M, Yumoto N. Cloning and over-expression of thermostable Bacillus sp. YM55-1 aspartase and site-directed mutagenesis for probing a catalytic residue. Eur J Biochem 2000; 267:1847-57. [PMID: 10712618 DOI: 10.1046/j.1432-1327.2000.01190.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A thermostable aspartase gene (aspB) from Bacillus sp. YM55-1 was cloned and the gene sequenced. The aspB gene (1407 bp ORF) encodes a protein with a molecular mass of 51 627 Da, consisting of 468 amino-acid residues. An amino-acid sequence comparison revealed that Bacillus YM55-1 aspartase shared 71% homology with Bacillus subtilis aspartase and 49% with Escherichia coli and Pseudomonas fluorescens aspartases. The E. coli TK237/pUCASPB strain, which was obtained by transforming E. coli TK237 (aspartase-null strain) with a vector plasmid (pUCASPB) containing the cloned aspB gene, produced a large amount of the enzyme corresponding to > 10% of the total soluble protein. The over-expressed recombinant enzyme (native molecular mass: 200 kDa) was purified effectively and rapidly using heat treatment and affinity chromatography. In order to probe the catalytic residues of this enzyme, two conserved amino-acid residues, Lys183 and His134, were individually mutated to alanine. Although the tertiary structure of each mutant was estimated to be the same as that of wild-type aspartase in CD and fluorescence measurements, the Lys183Ala mutant lost its activity completely, whereas His134Ala retained full activity. This finding suggests that Lys183 may be involved in the catalytic activity of this thermostable Bacillus YM55-1 aspartase.
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Affiliation(s)
- Y Kawata
- Department of Biotechnology, Tottori University, Japan.
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Nagai J, Ishida Y, Koga N, Tanaka Y, Ohnuma K, Toyoda Y, Katoh A, Hayabuchi Y, Kigasawa H. A new sensitive and specific combination of CD81/CD56/CD45 monoclonal antibodies for detecting circulating neuroblastoma cells in peripheral blood using flow cytometry. J Pediatr Hematol Oncol 2000; 22:20-6. [PMID: 10695817 DOI: 10.1097/00043426-200001000-00004] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE Intensive chemoradiotherapy followed by peripheral blood stem cell transplantation has been introduced to treat children with advanced neuroblastoma (NBL). Detection of NBL cells in peripheral blood (PB) is important to prevent reinfusion of NBL cells. Several immunologic methods have been proposed for detecting NBL cells in hematologic samples. The development of a sensitive and specific combination of monoclonal antibodies (MoAbs) for detecting small numbers of NBL cells in PB using flow cytometry remains an important challenge. METHODS Twenty-one clinical samples from NBL tissues or smears containing NBL cells were examined for reactivity against CD81, CD56, and CD9 using an immunocytochemical technique. The expressions of CD81, CD56, CD9, and antihuman disialoganglioside GD2 MoAb (GD2) in five NBL cell lines were assayed by flow cytometry. For the evaluation of sensitivity, five NBL cell lines were added to normal PB and the detection level of the combination of CD81/CD56/CD45 MoAbs was compared with that of CD9/CD56/CD45 MoAbs (reported previously). One hundred thirty-three normal PB samples were examined to determine the sensitivity and specificity of this method. RESULTS All NBL cell lines showed strong positivity with CD81 and CD56 MoAb. However, CD9 MoAb was weakly positive against the five NBL cell lines. GD2 MoAb reacted strongly with four NBL cell lines, although almost the entire cell population of the SK-N-SH NBL line failed to bind the GD2 MoAb. In vitro experiments using NBL cell lines demonstrated that tumor cells added to normal PB cells could be detected by flow cytometry using CD81/CD56/CD45 MoAbs even at a concentration of 0.005%. Through comparative studies, the combination of CD81/CD56/CD45 MoAbs was found to be more sensitive and specific than that of CD9/CD56/CD45 MoAbs for detecting small numbers of NBL cells using the above cell lines. CONCLUSIONS Triple-color flow cytometric analysis using CD81/CD56/CD45 MoAbs is useful for detecting NBL cells in PB. Further studies testing this approach using samples of PB with NBL contamination are needed to test this approach in patients.
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Affiliation(s)
- J Nagai
- Division of Laboratory, Kanagawa Children's Medical Center, Yokohama, Japan
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Kawata Y, Kawagoe M, Hongo K, Miyazaki T, Higurashi T, Mizobata T, Nagai J. Functional communications between the apical and equatorial domains of GroEL through the intermediate domain. Biochemistry 1999; 38:15731-40. [PMID: 10625439 DOI: 10.1021/bi9909750] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [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: 11/30/2022]
Abstract
The Escherichia coli GroEL subunit consists of three domains with distinct functional roles. To understand the role of each of the three domains, the effects of mutating a single residue in each domain (Y203C at the apical, T89W at the equatorial, and C138W at the intermediate domain) were studied in detail, using three different enzymes (enolase, lactate dehydrogenase, and rhodanese) as refolding substrates. By analyzing the effects of each mutation, a transfer of signals was detected between the apical domain and the equatorial domain. A signal initiated by the equatorial domain triggers the release of polypeptide from the apical domain. This trigger was independent of nucleotide hydrolysis, as demonstrated using an ATPase-deficient mutant, and, also, the conditions for successful release of polypeptide could be modified by a mutation in the apical domain, suggesting that the polypeptide release mechanism of GroEL is governed by chaperonin-target affinities. Interestingly, a reciprocal signal from the apical domain was suggested to occur, which triggered nucleotide hydrolysis in the equatorial domain. This signal was disrupted by a mutation in the intermediate domain to create a novel ternary complex in which GroES and refolding protein are simultaneously bound in a stable ternary complex devoid of ATPase activity. These results point to a multitude of signals which govern the overall chaperonin mechanism.
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Affiliation(s)
- Y Kawata
- Department of Biotechnology, Faculty of Engineering, Tottori University, Tottori 680-0945, Japan.
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Yamasaki R, Hoshino M, Wazawa T, Ishii Y, Yanagida T, Kawata Y, Higurashi T, Sakai K, Nagai J, Goto Y. Single molecular observation of the interaction of GroEL with substrate proteins. J Mol Biol 1999; 292:965-72. [PMID: 10512696 DOI: 10.1006/jmbi.1999.3129] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [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: 11/22/2022]
Abstract
To understand the mechanism of GroEL-assisted protein folding, we observed the interaction of fluorescence-labeled GroEL with fluorescence-labeled substrate proteins at the single molecule level by total internal reflection fluorescence microscopy. GroEL with a A133C mutation in the equatorial domain was labeled with a fluorescent dye, tetramethylrhodamine. As substrate proteins, we used the largely denatured and partly denatured forms of bovine beta-lactoglobulin, both labeled with another fluorescent dye, Cy5. The complexes formed by GroEL with these substrates were characterized by size-exclusion gel chromatography. The recovered complexes were then observed by fluorescence microscopy. For both substrates, agreement of the fluorescent spots for tetramethylrhodamine and Cy5 indicated formation of the complex at the single molecule level. Similar observation of macroscopic binding by size-exclusion chromatography and microscopic binding by the fluorescence microscopy was done for the folding intermediate of Cy5-labeled bovine rhodanese. The fluorescence microscopy opens a new avenue for studying the interaction of GroEL with substrate proteins.
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Affiliation(s)
- R Yamasaki
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
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Higurashi T, Nosaka K, Mizobata T, Nagai J, Kawata Y. Unfolding and refolding of Escherichia coli chaperonin GroES is expressed by a three-state model. J Mol Biol 1999; 291:703-13. [PMID: 10448048 DOI: 10.1006/jmbi.1999.2994] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [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: 11/22/2022]
Abstract
The guanidine-hydrochloride (Gdn-HCl) induced unfolding and refolding characteristics of the co-chaperonin GroES from Escherichia coli, a homoheptamer of subunit molecular mass 10,000 Da, were studied by using intrinsic fluorescence, 1-anilino-8-naphthalene sulfonate (ANS) binding, and size-exclusion HPLC. When monitored by tyrosine fluorescence, the unfolding reaction of GroES consisted of a single transition, with a transition midpoint at around 1.0 M Gdn-HCl. Interestingly, however, ANS binding and size-exclusion HPLC experiments strongly suggested the existence of an intermediate state in the transition. In order to confirm the existence of an intermediate state between the native heptameric and unfolded monomeric states, a tryptophan residue was introduced into the interface of GroES subunits as a fluorescent probe. The unfolding reaction of GroES I48W as monitored by tryptophyl fluorescence showed a single transition curve with a transition midpoint at 0.5 M Gdn-HCl. This unfolding transition curve as well as the refolding kinetics were dependent on the concentration of GroES protein. CD spectrum and size-exclusion HPLC experiments demonstrated that the intermediates assumed a partially folded conformation at around 0.5 M Gdn-HCl. The refolding of GroES protein from 3 M Gdn-HCl was probed functionally by measuring the extent of inhibition of GroEL ATPase activity and the enhancement of lactate dehydrogenase refolding yields in the presence of GroEL and ADP. These results clearly demonstrated that the GroES heptamer first dissociated to monomers and then unfolded completely upon increasing the concentration of Gdn-HCl, and that both transitions were reversible. From the thermodynamic analysis of the dissociation reaction, it was found that the partially folded monomer was only marginally stable and that the stability of GroES protein is governed mostly by the association of the subunits.
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Affiliation(s)
- T Higurashi
- Department of Biotechnology Faculty of Engineering, Tottori University, Tottori, 680-0945, Japan
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