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Kan R, Ren P, Wu AX, Tang Q, Kong B, Xue C. Identification and molecular docking study of sugarcane leaf-derived compounds as potent dipeptidyl peptidase IV, α-glucosidase, and α-amylase inhibitors. J Sci Food Agric 2023. [PMID: 37038045 DOI: 10.1002/jsfa.12613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/30/2023] [Accepted: 04/11/2023] [Indexed: 05/23/2023]
Abstract
BACKGROUND Dipeptidyl peptidase-IV (DPP-IV), α-glucosidase, and α-amylase play a prominent role in regulating postprandial blood sugar levels, which are regarded as key targets for the treatment of type 2 diabetes mellitus (T2DM). The present study aimed to characterize bioactive compounds as potent crucial sugar metabolism enzyme inhibitors from sugarcane leaves by virtual screening. In total, 41 sugarcane leaf-derived compounds were used for the screening of multiple targets. Subsequently, the molecular mechanism and activity validation in vitro of the interaction between enzymes and compound were carried out. RESULTS Flavonoid compound schaftoside was identified by molecular simulation and showed significant DPP-IV (0.1050 ± 1.22 mmol L-1 ), α-glucosidase (0.078 ± 0.06 mmol L-1 ), and α-amylase (0.3067 ± 0.35 mmol L-1 ) inhibitory effects. The residues ARG125 and TYR662 of DPP-IV may play crucial roles in inhibiting the activity of DPP-IV. Multiple hydrogen bonds and electrostatic interactions were exhibited between schaftoside and α-glucosidase. Molecular modeling revealed that schaftoside displays strong binding with the catalytic triad (ASP197, ASP300, and GLU233) of α-amylase. CONCLUSION Our findings demonstrate that schaftoside from sugarcane leaves might be an edible for T2DM treatment." © 2023 Society of Chemical Industry.
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Affiliation(s)
- Ruotong Kan
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Pengfei Ren
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - AXue Wu
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Qingjuan Tang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Biao Kong
- Department of Chemistry, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials and iChEM, Fudan University, Shanghai, China
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Kan R, Yu Z, Zhao W. Identification and molecular action mechanism of novel TAS2R14 blocking peptides from egg white proteins. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114716] [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: 04/03/2023]
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3
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Wu A, Gao Y, Kan R, Ren P, Xue C, Kong B, Tang Q. Alginate Oligosaccharides Prevent Dextran-Sulfate-Sodium-Induced Ulcerative Colitis via Enhancing Intestinal Barrier Function and Modulating Gut Microbiota. Foods 2023; 12:foods12010220. [PMID: 36613442 PMCID: PMC9818813 DOI: 10.3390/foods12010220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/05/2023] Open
Abstract
Alginate oligosaccharides are degradation products of alginate and have attracted increasing attention due to their versatile biological functions. In the present study, C57BL/6 mice were used to assess the ameliorative effects and mechanisms of guluronate oligosaccharides (GAOS), mannuronic oligosaccharides (MAOS), and heterozygous alginate oligosaccharides (HAOS), which are the three alginate oligosaccharides of dextran sulfate sodium (DSS)-induced ulcerative colitis. The study showed that alginate oligosaccharides alleviated pathological histological damage by slowing down weight loss, inhibiting colonic length shortening, and reducing disease activity index (DAI) and histopathological scores. Alginate oligosaccharides modulated the colonic inflammatory response by reducing colonic MPO levels and downregulating the expression of IL-6 and IL-1β. Alginate oligosaccharides reduced intestinal permeability and reversed intestinal barrier damage by increasing the number of goblet cells, decreasing LPS levels, downregulating Bax protein levels, upregulating Bcl-2 protein levels, and enhancing the expression of the E-cadherin. Furthermore, alginate oligosaccharides modulated the composition of the gut microbiota and restored the production of short-chain fatty acids (SCFAs), especially acetate and butyrate. In conclusion, our study provides a scientific basis for the role of alginate oligosaccharides in relieving ulcerative colitis.
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Affiliation(s)
- Axue Wu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yuan Gao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Ruotong Kan
- College of Food Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Pengfei Ren
- College of Food Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, Qingdao 266100, China
- Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China
| | - Biao Kong
- Department of Chemistry, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China
| | - Qingjuan Tang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266100, China
- Correspondence: ; Tel.: +86-13912383919
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Yu Z, Cao Y, Kan R, Ji H, Zhao W, Wu S, Liu J, Shiuan D. Identification of egg protein-derived peptides as xanthine oxidase inhibitors: virtual hydrolysis, molecular docking, and in vitro activity evaluation. Food Science and Human Wellness 2022. [DOI: 10.1016/j.fshw.2022.06.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Zhao W, Li D, Wang Y, Kan R, Ji H, Su L, Yu Z, Li J. Identification and molecular docking of peptides from Mizuhopecten yessoensis myosin as human bitter taste receptor T2R14 blockers. Food Funct 2021; 12:11966-11973. [PMID: 34747964 DOI: 10.1039/d1fo02447g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bitter taste receptor 14(T2R14) is one of the most widely regulated bitter taste receptors (T2Rs) and plays a vital role in the research of T2R blockers. In this study, potential T2R14 blockers were identified from the myosin of Mizuhopecten yessoensis. Myosin was hydrolyzed in silico by gastrointestinal proteases, and the peptides were obtained. The peptides' biological activity, solubility, and toxicity were predicted, and the potential T2R14 blocking peptides were docked with T2R14. Subsequently, the in vitro T2R14 blocking activity of the selected peptide was verified by an electronic tongue. The results showed that QRPR had T2R14 blocking activity with an IC50 value of 256.69 ± 1.91 μM. Molecular docking analysis suggested the key role of the amino residues Asp168, Leu178, Asn157, and Ile262 in blocking T2R14, and revealed that the amino acid residues of T2R14 bound with the peptide QRPR via electrostatic interaction, hydrophobic interaction, conventional hydrogen bond, and hydrogen bond. The novel T2R14 blocking peptide QRPR is a potential candidate for suppressing bitterness.
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Affiliation(s)
- Wenzhu Zhao
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
| | - Donghui Li
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
| | - Yingxue Wang
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
| | - Ruotong Kan
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
| | - Huizhuo Ji
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
| | - Lijun Su
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
| | - Zhipeng Yu
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
| | - Jianrong Li
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, P.R. China.
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Yu Z, Kan R, Wu S, Guo H, Zhao W, Ding L, Zheng F, Liu J. Xanthine oxidase inhibitory peptides derived from tuna protein: virtual screening, inhibitory activity, and molecular mechanisms. J Sci Food Agric 2021; 101:1349-1354. [PMID: 32820534 DOI: 10.1002/jsfa.10745] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 08/11/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND There has been growing interest in the use of xanthine oxidase (XO) as a therapeutic agent to prevent gout and hyperuricemia. In the present study, XO inhibitory peptides were identified from tuna protein by virtual screening, and molecular docking was used to elicit the interaction mechanism between XO and peptides. RESULTS A novel tetrapeptide, EEAK, exhibited high XO inhibitory activity with an IC50 of 173.00 ± 0.06 μM. Molecular docking analysis revealed that EEAK bound with the pivotal residues of XO's active sites (i.e., Glu802, Arg880, Glu1261) through two conventional hydrogen bond interactions, two attractive charge interactions, and one salt bridge. EEAK could also bind with the residues Phe649, Leu648, Lys771, Ser876, Phe914, and Thr1010 of XO. CONCLUSION This study suggested that conventional hydrogen bond interactions and electrostatic interactions play an important role in XO inhibition. The novel XO inhibitory peptide EEAK from tuna protein could be used as potential candidate for controlling gout and hyperuricemia. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Zhipeng Yu
- College of Food Science and Engineering, Bohai University, Jinzhou, P.R. China
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, P.R. China
| | - Ruotong Kan
- College of Food Science and Engineering, Bohai University, Jinzhou, P.R. China
| | - Sijia Wu
- College of Food Science and Engineering, Bohai University, Jinzhou, P.R. China
| | - Hui Guo
- College of Food Science and Engineering, Bohai University, Jinzhou, P.R. China
| | - Wenzhu Zhao
- College of Food Science and Engineering, Bohai University, Jinzhou, P.R. China
| | - Long Ding
- College of Food Science and Engineering, Northwest A&F University, Yangling, P.R. China
| | - Fuping Zheng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, P.R. China
| | - Jingbo Liu
- Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P.R. China
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Yu Z, Kan R, Ji H, Wu S, Zhao W, Shuian D, Liu J, Li J. Identification of tuna protein-derived peptides as potent SARS-CoV-2 inhibitors via molecular docking and molecular dynamic simulation. Food Chem 2020; 342:128366. [PMID: 33092925 PMCID: PMC7553880 DOI: 10.1016/j.foodchem.2020.128366] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/07/2020] [Accepted: 10/09/2020] [Indexed: 12/11/2022]
Abstract
The present study aimed to identify potential SARS-CoV-2 inhibitory peptides from tuna protein by virtual screening. The molecular docking was performed to elicit the interaction mechanism between targets (Mpro and ACE2) and peptides. As a result, a potential antiviral peptide EEAGGATAAQIEM (E-M) was identified. Molecular docking analysis revealed that E-M could interact with residues Thr190, Thr25, Thr26, Ala191, Leu50, Met165, Gln189, Glu166, His164, His41, Cys145, Gly143, and Asn119 of Mpro via 11 conventional hydrogen bonds, 9 carbon hydrogen bonds, and one alkyl interaction. The formation of hydrogen bonds between peptide E-M and the residues Gly143 and Gln189 of Mpro may play important roles in inhibiting the activity of Mpro. Besides, E-M could bind with the residues His34, Phe28, Thr27, Ala36, Asp355, Glu37, Gln24, Ser19, Tyr83, and Tyr41 of ACE2. Hydrogen bonds and electrostatic interactions may play vital roles in blocking the receptor ACE2 binding with SARS-CoV-2.
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Affiliation(s)
- Zhipeng Yu
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, PR China
| | - Ruotong Kan
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, PR China
| | - Huizhuo Ji
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, PR China
| | - Sijia Wu
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, PR China
| | - Wenzhu Zhao
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, PR China.
| | - David Shuian
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, PR China
| | - Jingbo Liu
- Lab of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China
| | - Jianrong Li
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, PR China
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8
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Yu Z, Ji H, Shen J, Kan R, Zhao W, Li J, Ding L, Liu J. Identification and molecular docking study of fish roe-derived peptides as potent BACE 1, AChE, and BChE inhibitors. Food Funct 2020; 11:6643-6651. [DOI: 10.1039/d0fo00971g] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and beta-secretase 1 (BACE 1) play vital roles in the development and progression of Alzheimer's disease (AD).
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Affiliation(s)
- Zhipeng Yu
- College of Food Science and Engineering
- Bohai University
- Jinzhou 121013
- P.R. China
| | - Huizhuo Ji
- College of Food Science and Engineering
- Bohai University
- Jinzhou 121013
- P.R. China
| | - Juntong Shen
- College of Food Science and Engineering
- Bohai University
- Jinzhou 121013
- P.R. China
| | - Ruotong Kan
- College of Food Science and Engineering
- Bohai University
- Jinzhou 121013
- P.R. China
| | - Wenzhu Zhao
- College of Food Science and Engineering
- Bohai University
- Jinzhou 121013
- P.R. China
| | - Jianrong Li
- College of Food Science and Engineering
- Bohai University
- Jinzhou 121013
- P.R. China
| | - Long Ding
- College of Food Science and Engineering
- Northwest A&F University
- Yangling 712100
- P.R. China
| | - Jingbo Liu
- Lab of Nutrition and Functional Food
- Jilin University
- Changchun 130062
- P.R. China
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Shuen WH, Kan R, Yu Z, Lung HL, Lung ML. Novel lentiviral-inducible transgene expression systems and versatile single-plasmid reporters for in vitro and in vivo cancer biology studies. Cancer Gene Ther 2015; 22:207-14. [PMID: 25721206 DOI: 10.1038/cgt.2015.9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 01/20/2015] [Accepted: 01/21/2015] [Indexed: 12/11/2022]
Abstract
Many of the cancer cell lines derived from solid tumors are difficult to transfect using commonly established transfection approaches. This hurdle for some DNA transfection systems has hindered cancer biology studies. Moreover, there are limited tools for studying pathway activities. Therefore, highly efficient improved gene transfer and versatile genetic tools are required. In this study, we established and developed a comprehensive set of new lentiviral tools to study gene functions and pathway activities. Using the optimized conditions, cancer cell lines achieved >90% transduction efficiency. Novel lentiviral doxycycline-regulated pTet-IRES-EGFP (pTIE) systems for transgene expression and TRE reporters used for pathway activity determination were developed and tested. The pTIE Tet-Off system showed in vitro doxycycline-sensitive responses with low or undetectable leakage of protein expression and in vivo tumor suppression as illustrated using candidate tumor suppressors, Fibulin-2 and THY1. In contrast, the Tet-On system showed dose-dependent responses. The pTRE-EGFP (pTE) and pTRE-FLuc-EF1α-RLuc (pT-FER) reporters with the NFκB p65 subunit consensus sequence showed GFP and firefly luciferase responses, which were directly correlated with TNFα stimulation, respectively. Taken together, these newly developed lentiviral systems provide versatile in vitro and in vivo platforms to strengthen our capabilities for cancer biology studies.
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Affiliation(s)
- W H Shuen
- Department of Clinical Oncology, University of Hong Kong, Hong Kong (SAR), China
| | - R Kan
- Department of Clinical Oncology, University of Hong Kong, Hong Kong (SAR), China
| | - Z Yu
- Department of Clinical Oncology, University of Hong Kong, Hong Kong (SAR), China
| | - H L Lung
- 1] Department of Clinical Oncology, University of Hong Kong, Hong Kong (SAR), China [2] Center for Cancer Research, University of Hong Kong, Hong Kong (SAR), China [3] Center for Nasopharyngeal Carcinoma Research, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong (SAR), China
| | - M L Lung
- 1] Department of Clinical Oncology, University of Hong Kong, Hong Kong (SAR), China [2] Center for Cancer Research, University of Hong Kong, Hong Kong (SAR), China [3] Center for Nasopharyngeal Carcinoma Research, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong (SAR), China
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Cheng Y, Ho RLKY, Chan KC, Kan R, Tung E, Lung HL, Yau WL, Cheung AKL, Ko JMY, Zhang ZF, Luo DZ, Feng ZB, Chen S, Guan XY, Kwong D, Stanbridge EJ, Lung ML. Anti-angiogenic pathway associations of the 3p21.3 mapped BLU gene in nasopharyngeal carcinoma. Oncogene 2014; 34:4219-28. [PMID: 25347745 PMCID: PMC4761643 DOI: 10.1038/onc.2014.353] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 03/09/2014] [Revised: 08/01/2014] [Accepted: 09/02/2014] [Indexed: 12/31/2022]
Abstract
Zinc-finger, MYND-type containing 10 (ZMYND10), or more commonly called BLU, expression is frequently downregulated in nasopharyngeal carcinoma (NPC) and many other tumors due to promoter hypermethylation. Functional evidence shows that the BLU gene inhibits tumor growth in animal assays, but the detailed molecular mechanism responsible for this is still not well understood. In current studies, we find that 93.5% of early-stage primary NPC tumors show downregulated BLU expression. Using a PCR array, overexpression of the BLU gene was correlated to the angiogenesis network in NPC cells. Moreover, expression changes of the MMP family, VEGF and TSP1, were often detected in different stages of NPC, suggesting the possibility that BLU may be directly involved in the microenvironment and anti-angiogenic activity in NPC development. Compared with vector-alone control cells, BLU stable transfectants, derived from poorly-differentiated NPC HONE1 cells, suppress VEGF165, VEGF189 and TSP1 expression at both the RNA and protein levels, and significantly reduce the secreted VEGF protein in these cells, reflecting an unknown regulatory mechanism mediated by the BLU gene in NPC. Cells expressing BLU inhibited cellular invasion, migration and tube formation. These in vitro results were further confirmed by in vivo tumor suppression and a matrigel plug angiogenesis assay in nude mice. Tube-forming ability was clearly inhibited, when the BLU gene is expressed in these cells. Up to 70-90% of injected tumor cells expressing increased exogenous BLU underwent cell death in animal assays. Overexpressed BLU only inhibited VEGF165 expression in differentiated squamous NPC HK1 cells, but also showed an anti-angiogenic effect in the animal assay, revealing a complicated mechanism regulating angiogenesis and the microenvironment in different NPC cell lines. Results of these studies indicate that alteration of BLU gene expression influences anti-angiogenesis pathways and is important for the development of NPC.
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Affiliation(s)
- Y Cheng
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - R L K Y Ho
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - K C Chan
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - R Kan
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - E Tung
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - H L Lung
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - W L Yau
- Department of Anatomical and Cellular Pathology, Chinese University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - A K L Cheung
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - J M Y Ko
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - Z F Zhang
- Department of Pathology, Guangxi Medical University, Guangxi, People's Republic of China
| | - D Z Luo
- Department of Pathology, Guangxi Medical University, Guangxi, People's Republic of China
| | - Z B Feng
- Department of Pathology, Guangxi Medical University, Guangxi, People's Republic of China
| | - S Chen
- Department of Pathology, Guangxi Medical University, Guangxi, People's Republic of China
| | - X Y Guan
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - D Kwong
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - E J Stanbridge
- Department of Microbiology and Molecular Genetics, University of California, Irvine, CA, USA
| | - M L Lung
- Department of Clinical Oncology/Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong, SAR, Hong Kong
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Geoerger B, Bourdeaut F, Dubois S, Dewire M, Marabelle A, Pearson A, Modak S, Kan R, Matano A, Bhansali S, Parasuraman S, Chi S. Phase I Study of Lee011 (Cdk4/6 Inhibitor) in Patients with Malignant Rhabdoid Tumors, Neuroblastoma, and Cyclin D–Cdk4/6 Pathway-Activated Tumors. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu331.15] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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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12
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Lung HL, Man OY, Yeung MC, Ko JMY, Cheung AKL, Law EWL, Yu Z, Shuen WH, Tung E, Chan SHK, Bangarusamy DK, Cheng Y, Yang X, Kan R, Phoon Y, Chan KC, Chua D, Kwong DL, Lee AWM, Ji MF, Lung ML. SAA1 polymorphisms are associated with variation in antiangiogenic and tumor-suppressive activities in nasopharyngeal carcinoma. Oncogene 2014; 34:878-89. [PMID: 24608426 DOI: 10.1038/onc.2014.12] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 01/30/2014] [Accepted: 01/31/2014] [Indexed: 12/13/2022]
Abstract
Nasopharyngeal carcinoma (NPC) is a cancer that occurs in high frequency in Southern China. A previous functional complementation approach and the subsequent cDNA microarray analysis have identified that serum amyloid A1 (SAA1) is an NPC candidate tumor suppressor gene. SAA1 belongs to a family of acute-phase proteins that are encoded by five polymorphic coding alleles. The SAA1 genotyping results showed that only three SAA1 isoforms (SAA1.1, 1.3 and 1.5) were observed in both Hong Kong NPC patients and healthy individuals. This study aims to determine the functional role of SAA1 polymorphisms in tumor progression and to investigate the relationship between SAA1 polymorphisms and NPC risk. Indeed, we have shown that restoration of SAA1.1 and 1.3 in the SAA1-deficient NPC cell lines could suppress tumor formation and angiogenesis in vitro and in vivo. The secreted SAA1.1 and SAA1.3 proteins can block cell adhesion and induce apoptosis in the vascular endothelial cells. In contrast, the SAA1.5 cannot induce apoptosis or inhibit angiogenesis because of its weaker binding affinity to αVβ3 integrin. This can explain why SAA1.5 has no tumor-suppressive effects. Furthermore, the NPC tumors with this particular SAA1.5/1.5 genotype showed higher levels of SAA1 gene expression, and SAA1.1 and 1.3 alleles were preferentially inactivated in tumor tissues that were examined. These findings further strengthen the conclusion for the defective function of SAA1.5 in suppression of tumor formation and angiogenesis. Interestingly, the frequency of the SAA1.5/1.5 genotype in NPC patients was ~2-fold higher than in the healthy individuals (P=0.00128, odds ratio=2.28), which indicates that this SAA1 genotype is significantly associated with a higher NPC risk. Collectively, this homozygous SAA1.5/1.5 genotype appears to be a recessive susceptibility gene, which has lost the antiangiogenic function, whereas SAA1.1 and SAA1.3 are the dominant alleles of the tumor suppressor phenotype.
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Affiliation(s)
- H L Lung
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - O Y Man
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - M C Yeung
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - J M Y Ko
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - A K L Cheung
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - E W L Law
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - Z Yu
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - W H Shuen
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - E Tung
- 1] Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China [2] Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (SAR), People's Republic of China
| | - S H K Chan
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - D K Bangarusamy
- Genome Institute of Singapore, Biomedical Sciences Institutes, Singapore
| | - Y Cheng
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - X Yang
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - R Kan
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - Y Phoon
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - K C Chan
- Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China
| | - D Chua
- 1] Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China [2] Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (SAR), People's Republic of China [3] Comprehensive Oncology Centre, Hong Kong Sanatorium and Hospital, Happy Valley, Hong Kong (SAR), People's Republic of China
| | - D L Kwong
- 1] Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China [2] Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (SAR), People's Republic of China
| | - A W M Lee
- 1] Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (SAR), People's Republic of China [2] Department of Clinical Oncology, Pamela Youde Nethersole Eastern Hospital, Hong Kong (SAR), People's Republic of China [3] Department of Clinical Oncology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, People's Republic of China
| | - M F Ji
- Cancer Center, Zhongshan City Hospital, Zhongshan, People's Republic of China
| | - M L Lung
- 1] Department of Clinical Oncology and Center for Cancer Research, University of Hong Kong, Pokfulam, Hong Kong (SAR), People's Republic of China [2] Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (SAR), People's Republic of China
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Yim M, Steingisser J, Kan R, Nshala A, Larson R. Effectiveness of linezolid versus vancomycin treatment for MRSA skin and soft tissue infections. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.497] [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: 10/19/2022] Open
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Chawla SP, Tolcher AW, Staddon AP, Schuetze S, D'Amato GZ, Blay JY, Loewy J, Kan R, Demetri GD. Survival results with AP23573, a novel mTOR inhibitor, in patients (pts) with advanced soft tissue or bone sarcomas: Update of phase II trial. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.10076] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
10076 Background: AP23573 is an mTOR inhibitor that has demonstrated single-agent activity in a broad range of sarcoma tumor types in phase I phase II trials. Overall survival (OS) was monitored to characterize OS in the treated population and in the subset of patients who achieved a clinical benefit response (CBR). Methods: Pts with advanced sarcomas, with no restrictions on prior therapies, were enrolled into 4 cohorts based on histologic subtype, in a phase 2, Simon's 2-stage trial. AP23573 (12.5 mg, i.v.) was administered daily × 5 every 2 wks. Efficacy was assessed using RECIST, with CBR defined as a complete or partial response or stable disease for at least 16 wks duration. OS was defined as the time from the first dose of AP23573 to the date of death from any cause. Kaplan-Meier estimates of the survival times of the population were calculated with OS time censored at the last date the pt was known to be alive when the confirmation of death is absent or unknown. Patients are continuing to be followed for OS in this ongoing trial. Results: 212 pts (105 M/107 F; median age, 50.6 yrs ([17–79 yrs]) were treated. Most pts (79%) had received =2 prior treatments, and over 90% of pts had disease progression at time of enrollment. The overall CBR rate was 29%, including 5 PRs (4 bone sarcoma, 1 MFH). The median OS was 40.1 wks for the entire study population. In the subset of patients achieving CBRs the median time to OS was 67.6 wks, suggesting that achievement of CBR, which is a measure of tumor control, correlates with extending OS. Conclusions: AP23573 exhibits single-agent activity in pts with advanced sarcomas as demonstrated by the CBR rate as a primary efficacy endpoint. The results of the OS analysis suggest that achieving a CBR in this pt population can result in prolonged survival. The consistency of this finding should be further examined with other pt factors that are also hypothesized to correlate for survival in this pt population. [Table: see text] [Table: see text]
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Affiliation(s)
- S. P. Chawla
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - A. W. Tolcher
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - A. P. Staddon
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - S. Schuetze
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - G. Z. D'Amato
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - J. Y. Blay
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - J. Loewy
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - R. Kan
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
| | - G. D. Demetri
- Century City Doctor's Hospital, Santa Monica, CA; Cancer Therapy and Research Center, San Antonio, TX; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; University of Michigan Cancer Center, Ann Arbor, MI; H. Lee Moffitt Cancer Center, Tampa, FL; Centre Leon Berard, Lyon, France; ARIAD Pharmaceuticals Inc, Cambridge, MA; Dana-Farber Cancer Institute, Boston, MA
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Affiliation(s)
- R Kan
- Weatherall Institute of Molecular Medicine, The John Radcliffe Hospital, Oxford OX3 9DS, UK.
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Battino D, Kaneko S, Andermann E, Avanzini G, Canevini MP, Canger R, Croci D, Fumarola C, Guidolin L, Mamoli D, Molteni F, Pardi G, Vignoli A, Fukushima Y, Kan R, Takeda A, Nakane Y, Ogawa Y, Dansky L, Oguni M, Lopez-Ciendas I, Sherwin A, Andermann F, Seni MH, Goto M. Intrauterine growth in the offspring of epileptic women: a prospective multicenter study. Epilepsy Res 1999; 36:53-60. [PMID: 10463850 DOI: 10.1016/s0920-1211(99)00020-0] [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: 11/29/2022]
Abstract
The aim of the present study was to evaluate the risk of intrauterine growth delay in the offspring of epileptic mothers and to quantify the risks of intrauterine exposure to antiepileptic drugs (AEDs). Data concerning 870 newborns, prospectively collected in Canada, Japan and Italy, using the same study design, were pooled and analyzed. The overall proportion of newborns whose body weight (7.8%) or head circumference (11.1%) at birth were below the 10th percentile was not increased. However, logistic regression analysis showed that the risk of small head circumference was significantly higher in Italian than in Japanese (RR 4.2; 95% CI: 2.2-8.0) or Canadian children (RR 2.6; 95% CI: 1.1-6.5), and in children exposed to polytherapy (RR 2.7; 95% CI: 1.2-6.3), phenobarbital (PB) (RR 3.6; 95% CI: 1.4-9.4) and primidone (PRM) (RR 4.5; 95% CI: 1.5-13.8). Country was also the only factor affecting low body weight, with Italian children having a higher risk than Japanese (RR 5.2; 95% CI: 2.6-10.4) or Canadian (RR 8.8; 95% CI: 2.0-38.1) children. Due to the small categories, the influence of AED doses and plasma concentrations was studied for each individual AED, without adjustment for the other potential confounding factors. A clear dose-dependent effect was found for PB and PRM in terms of both small head circumference and low body weight, and a concentration-dependent effect for PB in terms of small head circumferences. The size of the difference between the Italian and the other two populations, which is only partially explained by differences in therapeutic regimens, suggests that genetic, environmental and ethnic factors also need to be taken into account when considering possible explanations.
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Affiliation(s)
- D Battino
- Carlo Besta Neurological Institute, Milan, Italy.
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Kaneko S, Battino D, Andermann E, Wada K, Kan R, Takeda A, Nakane Y, Ogawa Y, Avanzini G, Fumarola C, Granata T, Molteni F, Pardi G, Minotti L, Canger R, Dansky L, Oguni M, Lopes-Cendas I, Sherwin A, Andermann F, Seni MH, Okada M, Teranishi T. Congenital malformations due to antiepileptic drugs. Epilepsy Res 1999; 33:145-58. [PMID: 10094426 DOI: 10.1016/s0920-1211(98)00084-9] [Citation(s) in RCA: 218] [Impact Index Per Article: 8.7] [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
To identify the major risk factors for the increased incidence of congenital malformations in offspring of mothers being treated for epilepsy with antiepileptic drugs (AEDs) during pregnancy and, to determine the relative teratogenic risk of AEDs, we prospectively analyzed 983 offspring born in Japan, Italy, and Canada. The incidence of congenital malformations in offspring without drug exposure was 3.1%, versus an incidence with drug exposure of 9.0%. The highest incidence in offspring exposed to a single AED occurred with primidone (PRM; 14.3%), which was followed by valproate (VPA; 11.1%), phenytoin (PHT; 9.1%), carbamazepine (CBZ; 5.7%), and phenobarbital (PB; 5.1%). The VPA dose and level positively correlated with the incidence of malformations. This study first determined a cut-off value of VPA dose and level at 1000 mg/day and 70 microg/ml, respectively, to avoid the occurrence of malformations. The incidence of malformations increases as the number of drugs increases, and as the total daily dose increases. Specific combinations of AEDs such as VPA + CBZ and PHT + PRM + PB produced a higher incidence of congenital malformations. The incidence of malformations was not associated with any background factors studied except for the presence of malformations in siblings. These results indicate that the increased incidence of congenital malformations was caused primarily by AEDs, suggesting that malformations can be prevented by improvements in drug regimen, and by avoiding polypharmacy and high levels of VPA (more than 70 microg/ml) in the treatment of epileptic women of childbearimg age.
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Affiliation(s)
- S Kaneko
- Department of Neuropsychiatry, Hirosaki University, Japan
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Abstract
OBJECTIVE To identify factors predicting bone mineral loss during anticancer chemotherapy. METHODS Fifteen women (mean age 38.2 +/- 7.8 years; range 30-46 years) with ovarian cancer who had been treated with cisplatin-adriamycin-cyclophosphamide for six cycles every 4 weeks following surgical cytoreductin were studied. Bone mineral density (BMD) of the lumbar spine (L2-L4) was measured by dual-energy x-ray absorptiometry before and after chemotherapy. Fifteen age-matched women whose ovaries had been removed surgically for other reasons. served as controls. None of the patients had received hormonal treatment. The two groups were compared for percentage change of BMD (BMD%) over the same period. In the chemotherapy group, total fat mass, body fat ratio, total lean mass, percent lean, and ration of trunk fat to leg fat were measured by dual-energy x-ray absorptiometry. Lean loss during chemotherapy was also calculated. These variables were compared before and at the end of chemotherapy. Possible correlations of baseline variables with BMD% were determined in univariate and stepwise regression analysis. RESULTS Mean ( +/- standard deviation) BMD decreased to 87.4 +/- 2.1% after six cycles of chemotherapy and 97.6 +/- 0.4% after 6 months in controls, but the greatest decrease was observed in the chemotherapy group (P < .001). Although baseline lean mass, baseline BMD, body weight, and lean loss during chemotherapy were correlated with BMD% in univariate analysis, baseline lean mass was still significant in stepwise regression analysis. CONCLUSION Baseline lean mass predicts bone mineral lose with anticancer chemotherapy.
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Affiliation(s)
- T Douchi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Kagoshima University, Japan
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Kan R, Yashima Y, Takahashi Y, Takahashi R, Watabe M, Hagiwara M, Niwa S. Echographia as a symptom of interictal state in an epileptic patient: a case report. Psychiatry Clin Neurosci 1997; 51:27-30. [PMID: 9076857 DOI: 10.1111/j.1440-1819.1997.tb02362.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Echographia is a phenomenon in which a patient continuously translates verbal stimuli into writing. We encountered a patient with epilepsy who developed visual echographia during interictal periods. In this case, echographia was observed during two different periods, namely the period of disturbed consciousness after the epileptic seizure and the period of clear consciousness after suppression of the seizures. Disinhibition due to disturbance of the consciousness is considered to have been the cause of echographia in the former period. In the latter period, it is considered that echographia was caused by the release of lower function from suppression of upper function by brain dysfunction, as the after effect of status epilepticus. As echographia can be observed in epileptic patients, attention and careful observation by epileptologists is needed.
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Affiliation(s)
- R Kan
- Department of Neuropsychiatry, Fukushima Medical College, Japan
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Kan R. Bupivacaine cardiotoxicity: a controversy? Int J Obstet Anesth 1996; 5:137-9; author reply 139-41. [PMID: 15321372 DOI: 10.1016/s0959-289x(96)80017-3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kan R, Watabe M, Takahashi R, Kaneko Y, Miyamoto Y, Niwa S. Comparison of IMP-single photon emission computed tomography findings to Wechsler Intelligence Scale and Benton Visual Memory Scale. Psychiatry Clin Neurosci 1995; 49:S225-7. [PMID: 8612150 DOI: 10.1111/j.1440-1819.1995.tb02182.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 01/31/2023]
Affiliation(s)
- R Kan
- Department of Neuropsychiatry, Fukushima Medical College, Japan
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Kan R, Watabe M, Takahashi R, Hagiwara M, Amanuma I, Takahashi Y, Kumashiro H. Serial changes of n-isopropyl-p-iodoamphetamine single photon emission computed tomography in two epileptic psychotics. Jpn J Psychiatry Neurol 1994; 48:567-70. [PMID: 7891419 DOI: 10.1111/j.1440-1819.1994.tb03015.x] [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: 01/27/2023]
Abstract
Serial changes of single photon emission computed tomography (SPECT) in two epileptic psychotics are reported. One patient had a decreased blood flow of the left temporal lobe with schizophrenia-like symptoms, and the other patient had a decreased blood flow of the right temporal lobe with depressive symptoms. In each case, these abnormal findings disappeared following recovery from a psychotic state. It might be suggested that the psychotic state of an epileptic patient influences the SPECT findings.
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Affiliation(s)
- R Kan
- Department of Neuropsychiatry, Fukushima Medical College, Fukushima, Japan
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Cummins JM, Jequier AM, Kan R. Molecular biology of human male infertility: links with aging, mitochondrial genetics, and oxidative stress? Mol Reprod Dev 1994; 37:345-62. [PMID: 8185940 DOI: 10.1002/mrd.1080370314] [Citation(s) in RCA: 190] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- J M Cummins
- School of Veterinary Studies, Murdoch University, Western Australia
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Kaneko S, Otani K, Kondo T, Fukushima Y, Kan R, Takeda A, Nakane Y. Teratogenicity of antiepileptic drugs and drug specific malformations. Jpn J Psychiatry Neurol 1993; 47:306-8. [PMID: 8271575 DOI: 10.1111/j.1440-1819.1993.tb02084.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- S Kaneko
- Department of Neuropsychiatry, Hirosaki University
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Takahashi R, Hagiwara M, Watabe M, Kan R, Takahashi Y. Carbamazepine and carbamazepine-10, 11-epoxide concentrations in rat brain and blood evaluated by in vivo microdialysis. Jpn J Psychiatry Neurol 1993; 47:293-4. [PMID: 8271569 DOI: 10.1111/j.1440-1819.1993.tb02078.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- R Takahashi
- Department of Neuropsychiatry, Fukushima Medical College
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Wada K, Saito F, Fukushima Y, Watanabe M, Kan R, Kumashiro H, Yoshikawa J, Miyasaka M, Yamaguchi N, Kido H. Prognosis of temporal lobe epilepsy: report of a multi-institutional study. Jpn J Psychiatry Neurol 1992; 46:427-9. [PMID: 1434175 DOI: 10.1111/j.1440-1819.1992.tb00890.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- K Wada
- Department of Neuropsychiatry, Hirosaki University School of Medicine
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Kaneko S, Otani K, Kondo T, Fukushima Y, Nakamura Y, Ogawa Y, Kan R, Takeda A, Nakane Y, Teranishi T. Malformation in infants of mothers with epilepsy receiving antiepileptic drugs. Neurology 1992; 42:68-74. [PMID: 1574179] [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: 12/27/2022] Open
Abstract
To assess the relative contribution of antiepileptic drugs (AEDS) to occurrence of congenital malformations, we compared two prospective studies. We analyzed data for 14 AEDs for total daily doses (drug score) and eight background factors. From the first study, the drug score and polytherapy--particularly the use of valproate plus carbamazepine--were suspected to be primary factors for increased incidence of congenital malformation. In the other study, the drug score for each case was decreased, and polytherapy--particularly valproate plus carbamazepine--was changed to monotherapy before conception. These changes significantly decreased the incidence of malformations. Among risk factors, only the doses of methylphenobarbital for mothers of infants with malformations were significantly higher than those for mothers of infants without malformations. Statistical differences were seen in drug score, number of AEDs, maternal age at delivery, seizure type, and etiology of epilepsy between the two groups. When data were corrected for seizure type, maternal age at delivery, or etiology of epilepsy, the difference in the incidence of malformations did not disappear, but it did disappear when data were corrected for drug score or number of AEDs. These results support our previous observations that AEDs are primary factors for the increased incidence of congenital malformation in infants of mothers with epilepsy.
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Affiliation(s)
- S Kaneko
- Department of Neuropsychiatry, Hirosaki University Hospital, Japan
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Kajiwara N, Tomiyama H, Kushiro T, Kan R. [Insulin--pharmacological aspects]. Nihon Rinsho 1992; 50 Suppl:146-50. [PMID: 1635184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- N Kajiwara
- Department of Cardiology, Surugadai Nihon University Hospital
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Kan R, Takahashi Y, Sato K, Watabe M, Tago H, Yashima Y, Kumashiro H. Serial changes of SPECT in periodic synchronous discharges in a case with Creutzfeldt-Jakob disease. Jpn J Psychiatry Neurol 1992; 46:175-9. [PMID: 1635307 DOI: 10.1111/j.1440-1819.1992.tb00831.x] [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: 12/28/2022]
Abstract
We conducted serial EEG and SPECT studies on one female with Creutzfeldt-Jakob disease (CJD). In an analysis of EEG, a periodic synchronous discharge (PSD) was observed in the middle of the third stage (terminal stage) of Bernoulli's classification. The frequency of PSD was the highest at the beginning of the third stage, followed by a gradual decrease and disappeared at the end of the third stage. In the middle of the third stage, SPECT disclosed blood flow differences between the cerebrum and other regions (the cerebellum and the brainstem), while no such difference was observed by SPECT at the end of the third stage. It was suggested that the appearance of PSD requires the presence of a pathological change in the cerebrum precedent to other regions.
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Affiliation(s)
- R Kan
- Department of Neuropsychiatry, Fukushima Medical College, Japan
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Ballough G, Majchrzak M, Strauss J, Kan R, Anthony A, Will B. Cytophotometric analysis of magnocellular azure B-RNA and Feulgen-DNA following chronic GABA infusion into the nucleus basalis of rats. Life Sci 1992; 50:1299-310. [PMID: 1373212 DOI: 10.1016/0024-3205(92)90280-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This investigation was undertaken to examine possible cytopathic effects of GABA infusion on nucleus basalis (NBM) magnocellular neurons. Sixty-three male Long-Evans rats received unilateral, intra-NBM infusions of either GABA100 (100 micrograms/microliters/h), GABA10 (10 micrograms/microliters/h), or ultrafiltered saline (1 microliter/h) for a period of 24 hours. Rats from each of these groups were sacrificed at either 24 hours, 48 hours or 8 days following initiation of infusions. The sham operated hemisphere of each rat served as a control for the infused hemisphere. After stoichiometric azure B-RNA and Feulgen-DNA staining of brain sections, scanning-integrating microdensitometry was used to quantify GABA-induced alterations in these well established indices of neuronal toxicity. These results provide evidence that the neurotoxic effects of 24 hours of 100 micrograms/microliters-h GABA infusion are manifested within 48 hours post-initiation of infusions. Although 24 hours of 10 micrograms/microliters-h GABA infusion suppressed NBM neuronal metabolism, the lower magnitude and duration of this effect signified an impending recovery. GABA infusion resulted in little if any NBM neuronal chromatin template impairment (i.e., reduced Feulgen-DNA reactivity), irrespective of the dosage employed and the delay prior to sacrifice.
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Affiliation(s)
- G Ballough
- L.N.B.C., U.P.R. 419 du CNRS, Strasbourg, France
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Pahl MV, Barbari A, Vaziri ND, Hollander D, Yazdani M, Tran J, Kan R. Intestinal absorption of linoleic acid in experimental renal failure. Br J Nutr 1991; 66:467-77. [PMID: 1772871 DOI: 10.1079/bjn19910048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Linoleic acid (LA) transport in rats with experimental short-term and long-term renal failure (RF) was compared with that of sham-operated normal animals on liberal food intake and pair-fed animals. The perfusions in vivo and incubations in vitro were conducted using a micellar solution containing a wide range of LA concentrations. Both absorption in vivo and uptake in vitro of LA were significantly reduced in animals with short-term RF. Lipid extraction and separation by thin-layer chromatography revealed a marked LA trapping as trilinolein (TL) in the perfused intestinal tissue in the short-term RF group. The esterification process, as defined by the rate of LA incorporation into TL, was moderately reduced in short-term RF animals. The thickness of the unstirred water layer showed no significant difference among the groups studied. In contrast, animals with long-term RF exhibited normal absorption of LA in vivo at all concentrations tested. In conclusion, LA absorption is reduced in short-term RF and restored in long-term RF. Several steps including LA transport into and TL transport out of the enterocyte and the esterification process were impaired in short-term RF. These changes are not due to alteration in the unstirred water layer, anorexia, weight loss or a rapid effect of uraemic chemical environment or circulatory factors.
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Affiliation(s)
- M V Pahl
- Department of Medicine, University of California, Irvine 92668
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Kaneko S, Otani K, Hirano T, Kondo T, Fukushima Y, Nakamura Y, Ogawa Y, Saito Y, Kan R, Kumashiro H. Teratogenicity of antiepileptic drugs: is the prevention possible? Jpn J Psychiatry Neurol 1991; 45:478-81. [PMID: 1762253 DOI: 10.1111/j.1440-1819.1991.tb02526.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To assess the relative contribution of antiepileptic drugs (AEDs) toward the occurrence of congenital malformation, two prospective studies (previous and present) were compared. In the present subjects of 145 cases, the total daily dose of AEDs (drug score) in each case was decreased as much as possible, and polypharmacy was changed to monopharmacy before conception where it was possible. The incidence of malformations significantly decreased from 13.5% to 6.2% (p = 0.031) by the change in drug regimen. The drug score, number of AEDs, maternal age at delivery, seizure type, and etiology of epilepsy were statistically different between the two study groups. Even after the correction of the data by the last three factors, the difference in the incidence of malformation did not disappear, while it disappeared if data were corrected either by the drug score or number of AEDs. These results suggest that the possibility of prevention of AED related malformations is possible by an improvement in AED therapy.
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Affiliation(s)
- S Kaneko
- Department of Neuropsychiatry, Hirosaki University Hospital, Japan
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Nakamura M, Yamanobe T, Suyemitsu T, Komukai M, Kan R, Okinaga S, Arai K. A new membrane-associated Ca(2+)-binding protein of rat spermatogenic cells: its purification and characterization. Biochem Biophys Res Commun 1991; 176:1358-64. [PMID: 2039518 DOI: 10.1016/0006-291x(91)90436-b] [Citation(s) in RCA: 7] [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: 12/29/2022]
Abstract
A Ca(2+)-binding protein of Mr = 52000, estimated by SDS-PAGE, was purified to a final yield of 0.04% from rat spermatogenic cells. Purification steps included gel filtration, ammonium sulfate precipitation and HPLC. Amino acid analysis showed the content of 34% acidic residues and 15% basic residues. The isoelectric point of this protein was 4.7. Dot-blot analysis indicated that the Ca(2+)-binding protein bound 2 mol of calcium per mol of protein. This protein had two binding sites with dissociation constants of 4.8 microM and 0.2 microM. No appreciable amount of hexose was observed (less than 1 microgram of hexose/70 micrograms of protein). This protein may play an important role such as the Ca(2+)-transport in the plasma membrane of spermatogenic cells.
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Affiliation(s)
- M Nakamura
- Department of Obstetrics and Gynecology, School of Medicine, Teikyo University, Tokyo, Japan
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Arakawa S, Isobe S, Mori H, Kambegawa A, Kan R, Okinaga S, Arai K. The effect of epidermal growth factor (EGF) on progestin secretion and cyclic AMP synthesis in cultured luteal cells from pregnant rats. Endocrinol Jpn 1990; 37:479-87. [PMID: 1964636 DOI: 10.1507/endocrj1954.37.479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
It is reported that steroid synthesis in ovarian cells is affected by epidermal growth factor (EGF). We cultured luteal cells from pregnant rats for 2 days with or without EGF, followed by incubation of the cells with or without stimulants (hCG, forskolin and dibutyryl cyclic AMP) for 5 hours. The levels of progesterone, 20 alpha-hydroxy-pregn-4-en-3-one (20 alpha-dihydroprogesterone) and cyclic AMP (cAMP) in the media were assayed. EGF had no effect on the basal levels of progesterone, 20 alpha-dihydroprogesterone and cAMP, but it suppressed these levels which were increased by the stimulants. We investigated binding capacity of [125I]-EGF to ovarian tissue of pregnant rats. Ovarian tissue had specific binding sites for EGF. The maximum number of binding sites was 2.38 fmol/mg tissue and the Kd value was 0.547 nM. It was indicated that EGF modified the reactivity of luteal cells to stimulants; counteracting the tropic effect of gonadotropins. It was shown that this effect of EGF might be exerted through its receptor in luteal cells.
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Affiliation(s)
- S Arakawa
- Department of Obstetrics and Gynecology, Teikyo University School of Medicine, Tokyo, Japan
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Kan R, Takahashi Y, Takahashi R, Hagiwara M, Yashima Y, Kumashiro H. Epileptic patient demonstrating echographia during interictal states. Jpn J Psychiatry Neurol 1990; 44:404-6. [PMID: 2124300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- R Kan
- Department of Neuropsychiatry, Fukushima Medical College
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Kan R, Mori Y, Suzuki S, Ono T, Takahashi Y, Kumashiro H. A case of temporal lobe astrocytoma associated with epileptic seizures and schizophrenia-like psychosis. Jpn J Psychiatry Neurol 1989; 43:97-103. [PMID: 2739175 DOI: 10.1111/j.1440-1819.1989.tb02557.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The clinical pictures of a left temporal lobe astrocytoma involving the hippocampal region showed a period of 27 years from ages 12 to 38 by epileptic seizures and a period of 9 years from 14 to 22 by schizophrenia-like symptoms and the following aggressive behavior during 16 years from ages 23 to 38. After a resection of the temporal lobe tumor sparing the hippocampus, transient delusions and aggressive behavior were observed. It might be considered that the hippocampus has the most suspectable relationship with the schizophrenia-like symptoms.
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Affiliation(s)
- R Kan
- Department of Neuropsychiatry, Fukushima Medical College, Japan
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Sato Y, Sasaki M, Kan R, Osaku A, Koyama S, Shibayama S, Sato M, Narumiya K, Takagi T, Kojima M. Thyroid antigen-mediated glomerulonephritis in Graves' disease. Clin Nephrol 1989; 31:49-52. [PMID: 2521588] [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: 01/01/2023] Open
Abstract
We describe a patient with Graves' disease in whom marked proteinuria, microhematuria and hypoalbuminemia were associated. Renal biopsy demonstrated electrondense deposits in the capillary basement membrane, a finding consistent with immune complex glomerulonephritis. Indirect immunofluorescent examination with rabbit antihuman thyroglobulin indicated that these electron-dense deposits were thyroid antigen-mediated immune complexes.
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Affiliation(s)
- Y Sato
- Surugadai Nihon University Hospital, Department of Cardiology, Tokyo, Japan
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Kan R, Ono T, Takano T, Yoshijima T, Masubuchi Y, Endo M, Kumashiro H. Generalized seizure triggering threshold and serum phenobarbital levels during pregnancy in rats. Epilepsia 1985; 26:682-8. [PMID: 4076071 DOI: 10.1111/j.1528-1157.1985.tb05711.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In experiments using pregnant rats, the following results were noted: (a) Of the amygdaloid kindled rats, the generalized seizure triggering threshold of the pregnant group was significantly higher than that of the nonpregnant group. (b) Of the rats taking oral phenobarbital, 4 mg/kg once a day, there was no significant difference of serum levels between the pregnant group and the nonpregnant group. (c) Of the amygdaloid kindled rats taking oral phenobarbital, 4 mg/kg once a day, the generalized seizure triggering threshold of the pregnant group was significantly higher than that of the nonpregnant group. It may be suggested that, when the drug dose remains the same, the rise in threshold by gestational physiological changes antagonizes the fall in threshold by decreased serum levels of anticonvulsants because of increasing distribution volume due to increasing body weight during pregnancy.
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Watanuki T, Yamamoto Y, Ishikawa M, Murakami H, Akaba N, Yohda T, Kan R. Experimental studies of a nonwoven vascular prosthesis for use in small arteries. World J Surg 1978; 2:867-71. [PMID: 726492 DOI: 10.1007/bf01556543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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