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Ahmed SHH, Tayeb BA, Gonda T, Girst G, Szőri K, Berkecz R, Zupkó I, Minorics R, Hunyadi A. Thymoquinone-protoflavone hybrid molecules as potential antitumor agents. PLoS One 2024; 19:e0291567. [PMID: 38271403 PMCID: PMC10810434 DOI: 10.1371/journal.pone.0291567] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
We describe herein the synthesis of eight new ester-coupled hybrid compounds from thymoquinone and protoflavone building blocks, and their bioactivity testing against multiple cancer cell lines. Among the hybrids, compound 14 showed promising activities in all cell lines studied. The highest activities were recorded against breast cancer cell lines with higher selectivity to MDA-MB-231 as compared to MCF-7. Even though the hybrids were found to be completely hydrolysed in 24 h under cell culture conditions, compound 14 demonstrated a ca. three times stronger activity against U-87 glioblastoma cells than a 1:1 mixture of its fragments. Further, compound 14 showed good tumour selectivity: it acted 4.4-times stronger on U-87 cells than on MRC-5 fibroblasts. This selectivity was much lower, only ca. 1.3-times, when the cells were co-treated with a 1:1 mixture of its non-coupled fragments. Protoflavone-thymoquinone hybrids may therefore serve as potential new antitumor leads particularly against glioblastoma.
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Affiliation(s)
- Sara H. H. Ahmed
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
| | - Bizhar A. Tayeb
- Institute of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - Tímea Gonda
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
| | - Gábor Girst
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
| | - Kornél Szőri
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
| | - Róbert Berkecz
- Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary
| | - István Zupkó
- Institute of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - Renáta Minorics
- Institute of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - Attila Hunyadi
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
- HUN-REN-SZTE Biologically Active Natural Products Research Group, Szeged, Hungary
- Interdisciplinary Centre of Natural Products, University of Szeged, Szeged, Hungary
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2
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Ahmed SHH, Gonda T, Agbadua OG, Girst G, Berkecz R, Kúsz N, Tsai MC, Wu CC, Balogh GT, Hunyadi A. Preparation and Evaluation of 6-Gingerol Derivatives as Novel Antioxidants and Antiplatelet Agents. Antioxidants (Basel) 2023; 12:antiox12030744. [PMID: 36978992 PMCID: PMC10045534 DOI: 10.3390/antiox12030744] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/10/2023] [Accepted: 03/13/2023] [Indexed: 03/30/2023] Open
Abstract
Ginger (Zingiber officinale) is widely used as a spice and a traditional medicine. Many bioactivities have been reported for its extracts and the isolated compounds, including cardiovascular protective effects. Different pathways were suggested to contribute to these effects, like the inhibition of platelet aggregation. In this study, we synthesised fourteen 6-gingerol derivatives, including eight new compounds, and studied their antiplatelet, COX-1 inhibitor, and antioxidant activities. In silico docking of selected compounds to h-COX-1 enzyme revealed favourable interactions. The investigated 6-gingerol derivatives were also characterised by in silico and experimental physicochemical and blood-brain barrier-related parameters for lead and preclinical candidate selection. 6-Shogaol (2) was identified as the best overall antiplatelet lead, along with compounds 3 and 11 and the new compound 17, which require formulation to optimize their water solubility. Compound 5 was identified as the most potent antioxidant that is also promising for use in the central nervous system (CNS).
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Affiliation(s)
- Sara H H Ahmed
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
| | - Tímea Gonda
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
| | - Orinamhe G Agbadua
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
| | - Gábor Girst
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
| | - Róbert Berkecz
- Institute of Pharmaceutical Analysis, University of Szeged, H-6720 Szeged, Hungary
| | - Norbert Kúsz
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
| | - Meng-Chun Tsai
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Chin-Chung Wu
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - György T Balogh
- Institute of Pharmacodynamics and Biopharmacy, University of Szeged, H-6720 Szeged, Hungary
- Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
| | - Attila Hunyadi
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Hungary
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3
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Ahmed SHH, Gonda T, Hunyadi A. Medicinal chemistry inspired by ginger: exploring the chemical space around 6-gingerol. RSC Adv 2021; 11:26687-26699. [PMID: 35480015 PMCID: PMC9037716 DOI: 10.1039/d1ra04227k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 07/24/2021] [Indexed: 12/22/2022] Open
Abstract
Ginger (Zingiber officinale Roscoe) has been used as a spice and as a traditional remedy since ancient times, especially in traditional Chinese medicine. It has been applied as a treatment for many diseases either alone or in combination with other remedies. Many studies were conducted on ginger and its constituents and a wide array of bioactivities were reported, e.g., antioxidant, anti-inflammatory, antiemetic, and anticancer activity. Most of these had been correlated to gingerols and shogaols, the most abundant secondary metabolites in ginger. This inspired several research groups to explore the biomedical value of the chemical space around these compounds, and many of their synthetic or semi-synthetic analogues have been prepared and studied for various bioactivities. Thanks to this, many valuable structure activity relationships have been revealed for such compounds. Herein, we provide a brief summary on the synthetic derivatization efforts that had so far been implemented on 6-gingerol, the main constituent of fresh ginger. This review covers 160 natural, semisynthetic, or synthetic 6-gingerol derivatives and their reported bioactivities. Structure and reported bioactivities of semi-synthetic and synthetic 6-gingerol derivatives.![]()
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Affiliation(s)
- Sara Hassan Hassan Ahmed
- Institute of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged Eötvös str. 6 H-6720 Szeged Hungary +3662546456.,Faculty of Pharmacy, University of Khartoum 1996 Khartoum Sudan
| | - Tímea Gonda
- Institute of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged Eötvös str. 6 H-6720 Szeged Hungary +3662546456
| | - Attila Hunyadi
- Institute of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged Eötvös str. 6 H-6720 Szeged Hungary +3662546456.,Interdisciplinary Centre for Natural Products, University of Szeged Eötvös str. 6 H-6720 Szeged Hungary
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4
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Bús C, Kulmány Á, Kúsz N, Gonda T, Zupkó I, Mándi A, Kurtán T, Tóth B, Hohmann J, Hunyadi A, Vasas A. Oxidized Juncuenin B Analogues with Increased Antiproliferative Activity on Human Adherent Cell Lines: Semisynthesis and Biological Evaluation. J Nat Prod 2020; 83:3250-3261. [PMID: 33064469 PMCID: PMC7707621 DOI: 10.1021/acs.jnatprod.0c00499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Phenanthrenes have become the subject of intensive research during the past decades because of their structural diversity and wide range of pharmacological activities. Earlier studies demonstrated that semisynthetic derivatization of these natural compounds could result in more active agents, and oxidative transformations are particularly promising in this regard. In our work, a natural phenanthrene, juncuenin B, was transformed by hypervalent iodine(III) reagents using a diversity-oriented approach. Eleven racemic semisynthetic compounds were produced, the majority containing an alkyl substituted p-quinol ring. Purification of the compounds was carried out by chromatographic techniques, and their structures were elucidated by 1D and 2D NMR spectroscopic methods. Stereoisomers of the bioactive derivatives were separated by chiral-phase HPLC and the absolute configurations of the active compounds, 2,6-dioxo-1,8a-dimethoxy-1,7-dimethyl-8-vinyl-9,10-dihydrophenanthrenes (1a-d), and 8a-ethoxy-1,7-dimethyl-6-oxo-8-vinyl-9,10-dihydrophenanthrene-2-ols (7a,b) were determined by ECD measurements and TDDFT-ECD calculations. The antiproliferative activities of the compounds were tested on different (MCF-7, T47D, HeLa, SiHa, C33A, A2780) human gynecological cancer cell lines. Compounds 1a-d, 4a, 6a, and 7a possessed higher activity than juncuenin B on several tumor cell lines. The structure-activity relationship studies suggested that the p-quinol (2,5-cyclohexadien-4-hydroxy-1-one) moiety has a considerable effect on the antiproliferative properties, and substantial differences could be identified in the activities of the stereoisomers.
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Affiliation(s)
- Csaba Bús
- Department
of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, 6720 Szeged, Hungary
| | - Ágnes Kulmány
- Department
of Pharmacodynamics and Biopharmacy, University
of Szeged, 6720 Szeged, Hungary
| | - Norbert Kúsz
- Department
of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, 6720 Szeged, Hungary
| | - Tímea Gonda
- Department
of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, 6720 Szeged, Hungary
| | - István Zupkó
- Department
of Pharmacodynamics and Biopharmacy, University
of Szeged, 6720 Szeged, Hungary
| | - Attila Mándi
- Department
of Organic Chemistry, University of Debrecen, 4032 Debrecen, Hungary
| | - Tibor Kurtán
- Department
of Organic Chemistry, University of Debrecen, 4032 Debrecen, Hungary
| | - Barbara Tóth
- Department
of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, 6720 Szeged, Hungary
| | - Judit Hohmann
- Department
of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, 6720 Szeged, Hungary
| | - Attila Hunyadi
- Department
of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, 6720 Szeged, Hungary
- Phone: +36-62-546456.
| | - Andrea Vasas
- Department
of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, 6720 Szeged, Hungary
- Phone: +36-62-546451.
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5
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Smith MS, Cash B, Konda V, Trindade AJ, Gordon S, DeMeester S, Joshi V, Diehl D, Ganguly E, Mashimo H, Singh S, Jobe B, McKinley M, Wallace M, Komatsu Y, Thakkar S, Schnoll-Sussman F, Sharaiha R, Kahaleh M, Tarnasky P, Wolfsen H, Hawes R, Lipham J, Khara H, Pleskow D, Navaneethan U, Kedia P, Hasan M, Sethi A, Samarasena J, Siddiqui UD, Gress F, Rodriguez R, Lee C, Gonda T, Waxman I, Hyder S, Poneros J, Sharzehi K, Di Palma JA, Sejpal DV, Oh D, Hagen J, Rothstein R, Sawhney M, Berzin T, Malik Z, Chang K. Volumetric laser endomicroscopy and its application to Barrett's esophagus: results from a 1,000 patient registry. Dis Esophagus 2019; 32:5481776. [PMID: 31037293 PMCID: PMC6853704 DOI: 10.1093/dote/doz029] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 02/08/2019] [Indexed: 12/11/2022]
Abstract
Volumetric laser endomicroscopy (VLE) uses optical coherence tomography (OCT) for real-time, microscopic cross-sectional imaging. A US-based multi-center registry was constructed to prospectively collect data on patients undergoing upper endoscopy during which a VLE scan was performed. The objective of this registry was to determine usage patterns of VLE in clinical practice and to estimate quantitative and qualitative performance metrics as they are applied to Barrett's esophagus (BE) management. All procedures utilized the NvisionVLE Imaging System (NinePoint Medical, Bedford, MA) which was used by investigators to identify the tissue types present, along with focal areas of concern. Following the VLE procedure, investigators were asked to answer six key questions regarding how VLE impacted each case. Statistical analyses including neoplasia diagnostic yield improvement using VLE was performed. One thousand patients were enrolled across 18 US trial sites from August 2014 through April 2016. In patients with previously diagnosed or suspected BE (894/1000), investigators used VLE and identified areas of concern not seen on white light endoscopy (WLE) in 59% of the procedures. VLE imaging also guided tissue acquisition and treatment in 71% and 54% of procedures, respectively. VLE as an adjunct modality improved the neoplasia diagnostic yield by 55% beyond the standard of care practice. In patients with no prior history of therapy, and without visual findings from other technologies, VLE-guided tissue acquisition increased neoplasia detection over random biopsies by 700%. Registry investigators reported that VLE improved the BE management process when used as an adjunct tissue acquisition and treatment guidance tool. The ability of VLE to image large segments of the esophagus with microscopic cross-sectional detail may provide additional benefits including higher yield biopsies and more efficient tissue acquisition. Clinicaltrials.gov NCT02215291.
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Affiliation(s)
- M S Smith
- Mount Sinai West & Mount Sinai St. Luke's Hospitals, New York, New York,Address correspondence to: Michael S. Smith, M.D., M.B.A., Chief of Gastroenterology and Hepatology, Mount Sinai West & Mount Sinai St. Luke's Hospitals, Ambulatory Care Center, Floor 13, 440 W. 114th Street, New York, NY 10025, USA.
| | - B Cash
- University of Texas Health Science Center at Houston, Houston, Texas
| | - V Konda
- Baylor University Medical Center, Dallas, Texas
| | - A J Trindade
- Zucker School of Medicine at Hofstra/Northwell, Northwell Health System Manhasset, New York
| | - S Gordon
- Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
| | | | - V Joshi
- University Medical Center at LSU, New Orleans, Louisiana
| | - D Diehl
- Geisinger Medical Center, Danville, Pennsylvania
| | - E Ganguly
- University of Vermont Medical Center, Burlington, Vermont
| | - H Mashimo
- VA Boston Health Care System, Boston, Massachusetts
| | - S Singh
- VA Boston Health Care System, Boston, Massachusetts
| | - B Jobe
- Allegheny Health Network, Pittsburgh, Pennsylvania
| | - M McKinley
- Zucker School of Medicine at Hofstra/Northwell, Northwell Health System Manhasset, New York,ProHEALTHcare Associates, Lake Success, New York, New York
| | | | - Y Komatsu
- Allegheny Health Network, Pittsburgh, Pennsylvania
| | - S Thakkar
- Allegheny Health Network, Pittsburgh, Pennsylvania
| | | | - R Sharaiha
- Weill Cornell Medicine, New York, New York
| | - M Kahaleh
- Robert Wood Johnson University Hospital, New Brunswick, New Jersey
| | | | | | - R Hawes
- Florida Hospital, Orlando, Florida
| | - J Lipham
- University of Southern California, Keck School of Medicine, Los Angeles, California
| | - H Khara
- Geisinger Medical Center, Danville, Pennsylvania
| | - D Pleskow
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | | | - P Kedia
- Methodist Health System, Dallas, Texas
| | - M Hasan
- Florida Hospital, Orlando, Florida
| | - A Sethi
- Columbia University Medical Center, New York, New York
| | | | | | - F Gress
- Columbia University Medical Center, New York, New York
| | - R Rodriguez
- University of South Alabama, Mobile, Alabama
| | - C Lee
- Zucker School of Medicine at Hofstra/Northwell, Northwell Health System Manhasset, New York
| | - T Gonda
- Columbia University Medical Center, New York, New York
| | - I Waxman
- Chicago Medicine, Chicago, Illinois
| | - S Hyder
- Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
| | - J Poneros
- Columbia University Medical Center, New York, New York
| | - K Sharzehi
- Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - J A Di Palma
- University of Texas Health Science Center at Houston, Houston, Texas
| | - D V Sejpal
- Zucker School of Medicine at Hofstra/Northwell, Northwell Health System Manhasset, New York
| | - D Oh
- University of Southern California, Keck School of Medicine, Los Angeles, California
| | - J Hagen
- University of Southern California, Keck School of Medicine, Los Angeles, California
| | - R Rothstein
- Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
| | - M Sawhney
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - T Berzin
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Z Malik
- Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - K Chang
- UC Irvine Medical Center, Irvine, California
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6
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Axelrad J, Faye A, Pinsino A, Cagliostro B, Thanataveerat A, Effner L, Pineda F, Garan A, Takayama H, Takeda K, Naka Y, Colombo P, Gonda T, Yuzefpolskaya M. Prospective Validation of the First Endoscopic Management Algorithm for Gastrointestinal Bleeding in Patients with Left Ventricular Assist Devices. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.318] [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: 10/27/2022] Open
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7
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Axelrad J, Pinsino A, Thanataveerat A, Cagliostro B, Flannery M, Ross K, Te-Frey R, Effner L, Garan A, Topkara V, Takayama H, Takeda K, Naka Y, Colombo P, Gonda T, Yuzefpolskaya M. A Prospective Validation of the First Endoscopic Management Algorithm for Gastrointestinal Bleeding in Patients with Continuous-Flow Left Ventricular Assist Devices. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.391] [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: 10/17/2022] Open
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Gonda T, Bérdi P, Zupkó I, Fülöp F, Szakonyi Z. Stereoselective Synthesis, Synthetic and Pharmacological Application of Monoterpene-Based 1,2,4- and 1,3,4-Oxadiazoles. Int J Mol Sci 2017; 19:ijms19010081. [PMID: 29283373 PMCID: PMC5796031 DOI: 10.3390/ijms19010081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 12/21/2017] [Accepted: 12/22/2017] [Indexed: 12/18/2022] Open
Abstract
Stereoselective synthesis of monoterpene-based 1,2,4- and 1,3,4-oxadiazole derivatives was accomplished starting from α,β-unsaturated carboxylic acids, obtained by the oxidation of (−)-2-carene-3-aldehyde and commercially available (−)-myrtenal. 1,2,4-Oxadiazoles were prepared in two steps via the corresponding O-acylamidoxime intermediates, which then underwent cyclisation induced by tetrabutylammonium fluoride (TBAF) under mild reaction conditions. Stereoselective dihydroxylation in highly stereospecific reactions with the OsO4/NMO (N-methylmorpholine N-oxide) system produced α,β-dihydroxy 1,2,4-oxadiazoles. Pinane-based 1,3,4-oxadiazoles were obtained similarly from acids by coupling with acyl hydrazines followed by POCl3-mediated dehydrative ring closure. In the case of the arane counterpart, the rearrangement of the constrained carane system occurred with the loss of chirality under the same conditions. Stereoselective dihydroxylation with OsO4/NMO produced α,β-dihydroxy 1,3,4-oxadiazoles. The prepared diols were applied as chiral catalysts in the enantioselective addition of diethylzinc to aldehydes. All compounds were screened in vitro for their antiproliferative effects against four malignant human adherent cell lines by means of the MTT assay with the O-acylated amidoxime intermediates exerting remarkable antiproliferative action.
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Affiliation(s)
- Tímea Gonda
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
| | - Péter Bérdi
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
| | - István Zupkó
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
- Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
- Stereochemistry Research Group of the Hungarian Academy of Sciences, H-6720 Szeged, Eötvös utca 6, Hungary.
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
- Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
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9
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Takahashi T, Gonda T, Mizuno Y, Fujinami Y, Maeda Y. Reinforcement in removable prosthodontics: a literature review. J Oral Rehabil 2017; 44:133-143. [PMID: 27893169 DOI: 10.1111/joor.12464] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/23/2016] [Indexed: 11/30/2022]
Abstract
Removable prosthodontics are often associated with mechanical troubles in daily use, such as fracture or deformation. These troubles render prostheses unusable and reduce wearers' QOL. Various reinforcements are used to prevent such problems, but consensus on reinforcement has not been reached. This review aimed to summarise the effects of reinforcement and to propose favourable reinforcement based on material, design and position in the prostheses. Initially, 139 articles were selected by electronic and manual searches. After exclusion of 99 articles based on the exclusion criteria, 40 articles were finally included in the review. Electronic searches were performed for articles published from 2005 to 2015 in PubMed, EMBASE, MEDLINE and Cochrane Library, and manual searches were performed in 10 journals relevant to the topic of removable prosthodontics. For in vitro studies, certain dental alloys and fibres were mainly used. Their forms were different, including complicated forms in dental alloys and various forms in fibres. The materials were examined for mechanical properties like fracture strength, flexural strength and elastic modulus and compared with one another or without reinforcement. There were a few clinical studies and one longitudinal study. Cast metal reinforcement seemed to be most favourable in terms of fracture toughness and stiffness. The most favourable forms differed depending on the prostheses, but placement around thin and deformable areas was effective. However, randomised or longitudinal clinical reports and comparative clinical studies on the use of reinforcement were still lacking and such studies are necessary in the future.
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Affiliation(s)
- T Takahashi
- Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Suita, Japan
| | - T Gonda
- Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Y Mizuno
- Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Y Fujinami
- Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Y Maeda
- Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Suita, Japan
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10
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Gonda T, Ötvös Sándor B, Hunyadi A. Synthesis of new, potentially bioactive chalcones as protoflavone analogues. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- T Gonda
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
| | - B Ötvös Sándor
- Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
- MTA-SZTE Stereochemistry Research Group, Hungarian Academy of Sciences, Szeged, Hungary
| | - A Hunyadi
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
- Interdisciplinary Centre for Natural Products, University of Szeged, Szeged, Hungary
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11
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12
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Abstract
Because the abutment becomes the fulcrum, and the denture base over the coping is usually thin, the overdenture is susceptible to fracture. We hypothesized that rational reinforcement can reduce strain and prevent deformation and fracture of the overdenture. We investigated the effect of reinforcement on overdenture strain around the copings and at a midline. A mandibular edentulous model with a 2-mm-thick artificial mucosa and abutment teeth installed bilaterally in the canine position was produced. The coping had a dome-shaped upper surface with a height of 6 mm. On the lingual polished surface, strain gauges were attached at the canine position and at the midline. A vertical load of 49 N was applied on the occlusal surface. Among several kinds of reinforcements, the cast metal reinforcement that covers both the midline and the coping top significantly reduced the strain on the overdenture. It is suggested that this simple reinforcement is effective in preventing deformation and fracture of the overdenture.
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Affiliation(s)
- T Gonda
- Division of Oromaxillofacial Regeneration, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
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13
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Gonda T, Yang TC, Maeda Y. Five-year multicenter study of magnetic attachments used for natural overdenture abutments. J Oral Rehabil 2013; 40:258-62. [PMID: 23356632 DOI: 10.1111/joor.12033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2013] [Indexed: 11/26/2022]
Abstract
The purpose of this study was to examine a longitudinal clinical performance of magnetic attachments used for natural overdenture abutments. The study included 131 patients who had used removable prostheses (complete overdentures 31%, partial dentures 69%) more than 5 years (40-90 years old) with 211 magnetic attachments on natural abutments (Magfit 400 or 600; Aichi Steel co., Aichi, Japan) treated in 15 clinics using a standardized protocol. Analyses were performed on the degree of patient satisfaction regarding retention, complications of magnets (corrosion, detachment from denture base), abutments (pain during mastication, periodontal pocket formation, inflammation, mobility), and dentures (fracture etc.). Ninety-seven percent of patients were satisfied with the retention and stability of their dentures. No corrosion of magnet was observed, and 19 magnets were detached. Most frequent complication of abutments was periodontal pocket formation (52%), followed by the inflammation (29%), increase in mobility (27%) and pain (4%). Magnetic attachment on natural tooth abutments provided a viable and long-term treatment option.
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Affiliation(s)
- T Gonda
- Department of Prosthodontics and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan
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14
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Abstract
The structural design of removable partial dentures (RPDs) is critical for preventing distortion of the prosthesis, protecting abutment teeth and residual ridges as well as for high masticatory performance. The aim of this study was to clarify the feasibility and utility of a computer-aided designing (CAD) system with finite element analysis (FEA) for molar teeth arrangement in unilateral distal extension base RPDs. The shapes of artificial teeth and residual ridge were measured and converted into point group data. Solid models were created from surface-modelled point group data in a 3D surface CAD format. An occlusal rim was created on the residual ridge mucosa and the occlusal rim - residual ridge mucosa model with FEA function was created. Stress distribution on the residual ridge mucosa was compared by changing the loading point. The artificial teeth were then arranged in locations with the lowest amount of stress. After building an artificial teeth - saddle - residual ridge mucosa model, stress distribution in the residual ridge mucosa was re-evaluated by simulating occlusal force. On the occlusal rim - residual ridge mucosa model, stress was reduced when the loading point was located around the buccal shelf where functional cusps of artificial teeth were charted. It was confirmed that stress distribution in the residual ridge mucosa was equalized on the artificial teeth - saddle - residual ridge mucosa model. This system might be clinically useful tool for designing RPDs if FEA-guided designing of retainers and connectors can be added.
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Affiliation(s)
- M Kibi
- Kibi Dental Clinic, Toyonaka, Japan
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15
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Tycko B, Gonda T, Shakya R, Quante M, Varro A, Wang T, Bhowick N, Ludwig T. 224 Epigenetics of carcinoma-associated myofibroblasts: implications for anti-cancer therapies. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70251-2] [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: 11/27/2022] Open
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16
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Ikebe K, Hazeyama T, Iwase K, Sajima H, Gonda T, Maeda Y, Nokubi T. Association of symptomless TMJ sounds with occlusal force and masticatory performance in older adults. J Oral Rehabil 2008; 35:317-23. [PMID: 18405267 DOI: 10.1111/j.1365-2842.2007.01841.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- K Ikebe
- Division of Oromaxillofacial Regeneration, Osaka University Graduate School of Dentistry, Osaka, Japan
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17
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Abstract
The purpose of this study was to investigate the influence of coping heights on the strain around the abutment teeth and at the middle part of mandibular overdentures, using strain gauges. A mandibular edentulous model with a silicone artificial mucosa of thickness 2 mm was made. Two artificial roots were embedded on both sides in the canine position. The coping had a dome-shaped upper surface at a height of 0, 2, 4 and 6 mm. On the lingual polished surface of the overdenture, three strain gauges were attached in the left canine position at the vertical level corresponding to the top of the 6, 4 and 2 mm copings and two strain gauges were attached in the middle section (upper and lower). A vertical loading of 49 N was applied on the occlusal surface of first premolar, first molar and second molar. When loading on the first premolar adjacent to an abutment, the largest tensile strain was observed on the overdenture surface close to the top of each coping, independent of coping heights. When loading on the first premolar on the opposite side, the tensile strains around the coping were remarkably smaller. In the middle part of the overdenture, the compressive strains became larger by reducing the coping height or loading on distal point. The largest tensile strain was observed on the overdenture surface close to the top of copings, independent of coping heights.
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Affiliation(s)
- J Dong
- Division of Oromaxillofacial Regeneration, Osaka University Graduate School of Dentistry, Osaka, Japan
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18
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Abstract
Recently, a newly developed magnetic attachment with stress breaker was used in retentive components in overdentures. Excessive lateral stress has a more harmful effect on natural teeth than axial stress, and the magnetic attachment with stress breaker is expected to reduce lateral forces on abutment teeth and protect it teeth from excessive stress. However, the properties of this retainer have not yet been determined experimentally. This study compares the lateral forces on abutment teeth for three retainers under loading on the denture base in a model study. A mandibular simulation model is constructed to measure lateral stress. Three types of retentive devices are attached to the canine root. These devices include the conventional root coping, the conventional magnetic attachment and the new magnetic attachment with stress breaker. For each retentive device, load is generated on the occlusal table of the model overdenture, and the lateral stress on the canine root and the displacement of the overdenture measured. The magnetic attachment with stress breaker does not displace the denture and exhibits lower lateral stress in the canine root than conventional root coping and magnetic attachments.
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Affiliation(s)
- T Gonda
- Division of Oromaxillofacial Regeneration, Course for Integrated Oral Science and Stomatology, Osaka University Graduate School of Dentistry, Osaka, Japan.
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19
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Abstract
The Wilms' tumour suppressor gene (WT1) encodes a zinc finger-containing nuclear protein essential for kidney and urogenital development. Initially considered a transcription factor, there is mounting evidence that WT1 has a role in post-transcriptional processing. Using the interspecies heterokaryon assay, we have demonstrated that WT1 can undergo nucleocytoplasmic shuttling. We have also mapped the region responsible for nuclear export to residues 182-324. Our data add further complexity to the role of WT1 in transcriptional and post-transcriptional regulation.
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Affiliation(s)
- P R Vajjhala
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Qld 4072, Australia.
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20
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Kawaguchi M, Koshimura K, Sohmiya M, Murakami Y, Gonda T, Kato Y. Effect of insulin on nitric oxide synthase-like immunostaining of arteries in various organs in Zucker diabetic fatty rats. Eur J Endocrinol 2001; 145:343-9. [PMID: 11517016 DOI: 10.1530/eje.0.1450343] [Citation(s) in RCA: 12] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
OBJECTIVE Recently we reported that insulin treatment improved hypertension by inducing nitric oxide synthase (NOS) in Zucker diabetic fatty (ZDF) rats. In the present study, we investigated subtypes of NOS induced by insulin in arteries in various organs of ZDF rats using immunohistochemistry. DESIGN Following treatment with insulin, localization of two subtypes of NOS in the arterial tissues of various organs was identified. METHODS Following 4 weeks of s.c. injection of insulin, the aorta, cerebral cortex, pancreas and kidney were stained with polyclonal anti-endothelial NOS (eNOS) or anti-inducible NOS (iNOS) antibodies. RESULTS In the aortic tissue, eNOS-like immunostaining was observed equally in the insulin-treated group and the control group, whereas iNOS-like immunostaining was present more densely in the insulin-treated group. In the cerebral artery, eNOS-like immunostaining was observed in the endothelium and was enhanced in the insulin-treated group. In the control group, iNOS-like immunostaining was absent in the cerebral artery, whereas immunostaining was densely observed in the insulin-treated group. In the interlobular artery of the pancreas, both eNOS-like and iNOS-like immunostaining was present in the control group and was enhanced in the insulin-treated group. In kidney, both eNOS-like and iNOS-like immunostaining was more densely present in the arterial tissue of the insulin-treated group. CONCLUSIONS These results taken together suggest that insulin treatment induced NOS in arteries in various organs and that iNOS was more strongly induced than eNOS by insulin treatment in the ZDF rat.
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Affiliation(s)
- M Kawaguchi
- First Division, Department of Medicine, Shimane Medical University, 89-1 Enya-cho, Izumo 693-8501, Japan.
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Yanabe M, Shibuya M, Gonda T, Asai H, Tanaka T, Sudou K, Narita T, Itoh K. Establishment of specific pathogen-free (SPF) rat colonies using gnotobiotic techniques. Exp Anim 2001; 50:293-8. [PMID: 11515091 DOI: 10.1538/expanim.50.293] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Gnotobiotic Wistar rats were produced using gnotobiotic techniques, which were established in the production of a SPF mouse colony, in order to establish a barrier-sustained colony. One strain of Escherichia coli, 28 strains of Bacteriodaceae (B-strains), three strains of Lactobacillus (L-strains) and a chloroform-treated fecal suspension (CHF, Clostridium mixture) were prepared from conventional Wistar rats as the microflora source. Two groups of limited-flora rats, E. coli plus B-strains and E. coli plus CHF, were produced. After confirmation that Clostridium difficile was not detected in the CHF-inoculated rats, two groups of limited-flora rats were transferred to an isolator and housed together in a cage. These rats were then orally inoculated with L-strains. The gnotobiotic rats showed colonization resistance to Pseudomonas aeruginosa, and the number of E. coli in the feces was 10(5) to 10(6)/g. The gnotobiotic rats were transferred to a barrier room as a source of intestinal flora for SPF colonies. In the SPF rats, basic cecal flora was mainly composed of Bacteroidaceae, clostridia, fusiform-shaped bacteria and lactobacilli, and did not change over a long period. Their flora became similar to that of conventional rats.
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Affiliation(s)
- M Yanabe
- Japan SLC, Inc., 95-10 Aoi-cho, Hamamatsu, Shizuoka 433-8111, Japan
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22
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Yanabe M, Shibuya M, Gonda T, Asai H, Tanaka T, Sudou K, Narita T, Matsui T, Itoh K. Establishment of specific pathogen-free guinea-pig colonies using limited-flora guinea-pigs associated with conventional guinea-pig flora, and monitoring of their cecal flora. Exp Anim 2001; 50:105-13. [PMID: 11381613 DOI: 10.1538/expanim.50.105] [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: 10/31/2022] Open
Abstract
Six groups of limited flora (LF) Hartley guinea-pigs were produced by inoculation of hysterectomy-derived GF guinea-pigs with various combinations of cecal bacteria of conventional (CV) guinea-pigs to determine the effective bacterial cocktails for the establishment of a specific pathogen free (SPF) colony. Bifidobacterium magnum (Bif) isolated from CV guinea-pigs was used for pretreatment. The mortality of LF guinea-pigs inoculated with only Bif was 75%, and that of those inoculated with Bif plus chloroform-treated cecal suspension (CHF) or Bif plus CHF plus 32 isolates from CV guinea-pigs was 40 to 66.7%. These three groups were in an unhealthy condition with mucoid enteritis-like diarrhea. However, the mortality of LF guinea-pigs inoculated with the anaerobic growth on EG plates injected with 10(-5) dilution of cecal contents (CF) or inoculated with Bif plus CF was 6.3 and 15%, respectively. These latter two groups of LF guinea-pigs were transferred to separate barrier rooms and some of the LF guinea-pigs were maintained in isolators as a source of intestinal flora for SPF guinea-pigs. The composition of cecal flora of LF guinea-pigs was stable for a long time, and bacteroidaceae and peptococcaceae were maintained as predominant components. The basic composition of the cecal flora of SPF guinea-pigs originated from LF guinea-pigs, which consists mainly of the anaerobic bacteria, was not changed over a long period, and the flora composition became similar to that in CV guinea-pigs. Guinea-pig-specific pathogens from the SPF colonies were not detected during experiments.
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Affiliation(s)
- M Yanabe
- Japan SLC, Inc., 95-10 Aoi-cho, Hamamatsu, Shizuoka 433-8111, Japan
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23
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Gonda T, Ramsay R. The Second International Workshop on Myb Genes: foreword. Blood Cells Mol Dis 2001; 27:407-8. [PMID: 11259162 DOI: 10.1006/bcmd.2001.0397] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- T Gonda
- Hanson Centre for Cancer Research, Institute of Medical and Veterinary Science, Frome Road, Adelaide, SA, 5000, Australia
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24
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Abstract
Neovascularization is important in the development of liver metastasis. We sought to define the origin and fine structure of the blood supply of small experimental liver metastases in rats using an injection replica method. Liver metastases were produced by intraportal inoculation of ascitic fluid containing AH60C hepatoma cells in male Donryu rats (n = 40). Intrahepatic microvasculature was studied by scanning electron microscopy and by stereomicroscopy of microvascular casts produced by perfusion via the abdominal aorta or portal vein 7 days following tumor inoculation. Intrahepatic microvasculature in rats without liver metastases (n = 10) also was studied by scanning electron microscopy. In the normal liver, branches of the hepatic artery typically terminated in the peribiliary plexus and less frequently led to sinusoids and terminal portal veins. In 69 metastatic tumors ranging from 269 to 1875 microm in diameter, arterially perfused metastatic tumors larger than 300 microm showed newly developed neovascularization. Portally perfusion of metastatic tumors did not visualize neovascularization irrespective of tumor size. At the periphery of metastases, tumor vessels disclosed by arterial perfusion most often communicated with the peribiliary plexus and less frequently with terminal arterioles. Metastatic liver tumors as small as 300 microm in diameter receive their main blood supply from the hepatic artery but not from the portal vein, and tumor vessels more often are derived from the arterially filled peribiliary plexus rather than from terminal arterioles.
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Affiliation(s)
- T Gonda
- Second Department of Surgery, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyoku, Tokyo, Japan
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25
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Papavasiliou AK, Magnadottir HB, Gonda T, Franz D, Harbaugh RE. Clinical outcomes after carotid endarterectomy: comparison of the use of regional and general anesthetics. J Neurosurg 2000; 92:291-6. [PMID: 10659017 DOI: 10.3171/jns.2000.92.2.0291] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [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: 11/06/2022]
Abstract
OBJECT The authors analyzed their series of carotid endarterectomies (CEAs), which were performed after administration of either a general or regional anesthetic, to determine whether the choice of anesthetic affected patients' clinical outcomes and length of hospital stay. METHODS A series of 803 consecutive CEAs performed between July 1990 and February 1999 was reviewed. Cases were analyzed for patient demographics, comorbid medical states, and perioperative complications. Contingency-table statistical analysis was used to compare the incidence of comorbid medical states and perioperative complications between patients who underwent CEA in which either a regional or general anesthetic was used. Student's t-test was used to compare the length of hospital stay and mean patient age. A regional anesthetic was used for 632 CEAs, and a general anesthetic was used for 171 operations. There were no statistically significant intergroup differences in demographics or comorbid medical states. The incidence of perioperative stroke and death did not differ significantly between the regional (2.7%) and the general anesthetic groups (2.3%). However, the incidence of nonneurological, nonfatal complications was significantly less in the regional anesthetic (1.6%) than in the general anesthetic group (14.6%, p<0.0001). Patients undergoing CEA in which a regional anesthetic was used had a significantly lower incidence of cardiopulmonary complications (myocardial infarction and postoperative intubation), cervical complications (neck hematomas and cranial nerve injuries), and urological complications (urinary retention) than patients who underwent surgery after receiving a general anesthetic. CONCLUSIONS Patients undergoing CEA in which a regional anesthetic was used had significantly fewer nonneurological, nonfatal complications, particularly cardiopulmonary complications, than similar patients surgically treated after induction of general anesthesia.
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Affiliation(s)
- A K Papavasiliou
- Department of Surgery (Neurosurgery), Dartmouth Medical School and Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire 03756, USA
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26
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Ishida H, Yoshinaga K, Gonda T, Ando M, Hojo I, Fukunari H, Iwama T, Mishima Y. Biliary carcinoembryonic antigen levels can predict metachronous liver metastasis of colorectal cancer. Anticancer Res 2000; 20:523-6. [PMID: 10769718] [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: 02/16/2023]
Abstract
We set out to determine whether carcinoembryonic antigen (CEA) levels in gallbladder bile and serum can predict metachronous liver metastasis of colorectal cancer. At the time of surgery, gallbladder bile and serum were sampled for enzyme immunoassays of CEA. Upper limit (mean +/- 2SD) of the normal range for CEA in bile was established from samples at surgery for nonneoplastic gallbladder disease. In 11 patients with synchronous liver metastases, biliary CEA levels correlated with the size of hepatic lesions. In 49 patients without evident liver metastases at the time of surgery, elevated biliary CEA levels predicted subsequent emergence of metachronous liver metastases with 75% sensitivity, 85% specificity, and 84% accuracy; serum CEA levels were not a reliable predictor. In conclusion, determination of biliary CEA level at the time of colorectal resection shows promise as a way to identify patients at high risk for hepatic recurrence.
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Affiliation(s)
- H Ishida
- Department of Surgery, Saitama Medical Center, Saitama Medical School, Japan
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27
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Abstract
When the potent inhibitor of nitric oxide (NO) synthesis NG-nitro-L-arginine (L-NNA) was incorporated into the diet, hypertension was induced and sustained due to the effects of the long-term inhibition of endothelium-dependent relaxing factor (EDRF)/NO. The effects of L-NNA on normotensive rats of four strains (Donryu, Sprague-Dawley (SD), Wistar, and Wistar-Kyoto (WKY)) were compared relative to control rats. L-NNA administration caused a sharp initial increase in systolic blood pressure (SBP) at 2 weeks in all animals, and this was followed by a gradual and steady increase until 4 weeks. At the end of the experiments (5 weeks), the mean SBP of Donryu and SD rats was decreased. The maximum blood pressure of Donryu and Wistar rats during the experiments exceeded 200 mmHg, but that of SD and WKY rats was below 200 mmHg. Body weight loss and death were observed only in L-NNA-fed Donryu rats. Pathological changes in the kidneys and the morbidity rates for the lesions were determined, and indicated that the Donryu L-NNA group was 100% positive. These results suggest that the Donryu strain is more sensitive to L-NNA than the other strains. That dietary L-NNA-induced hypertension in normotensive rats of the four strains provides a new artificially-induced hypertensive model in which vasoconstriction occurs mainly due to EDRF deficiency.
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Affiliation(s)
- K Kawakami
- Institute of Experimental Animals, Shimane Medical University, Japan
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28
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Yanabe M, Shibuya M, Gonda T, Asai H, Tanaka T, Narita T, Sudo K, Matsui T, Itoh K. Production of ex-germfree rabbits for establishment of specific pathogen-free (SPF) colonies. Exp Anim 1999; 48:79-86. [PMID: 10374068 DOI: 10.1538/expanim.48.79] [Citation(s) in RCA: 6] [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: 10/31/2022] Open
Abstract
Nine groups of ex-germfree (GF) rabbits were produced by inoculation of hysterectomy-derived GF rabbits with various combinations of cecal bacteria isolated from conventional (CV) rabbits in order to establish a barrier-sustained colony. Six strains of Bacteroides and two strains of Streptococcus isolated from CV rabbits (2 to 3 weeks old) were used for pretreatment. The mortality of ex-GF rabbits inoculated with the anaerobic growth (CF) on EG or SM10 plates inoculated with a 10(-5) dilution of cecal contents was 71.4 to 94.4% when given without pretreatment. All ex-GF rabbits pretreated with Bacteroides alone survived, but the mortality of ex-GF rabbits inoculated with Bacteroides plus Streptococcus strains as pretreatment was 20 and 45.4%. The mortality of ex-GF rabbits inoculated with only Bacteroides was 43%. All ex-GF rabbits inoculated with Bacteroides plus anaerobic growth (CF), cecal suspension of ex-GF mice which had been inoculated with cecal suspensions of CV rabbits (MF) or chloroform-treated cecal suspension (CHF) survived, but CHF inoculated ex-GF rabbits were in an unhealthy condition with slight diarrhoea. These data indicate that inoculation with Bacteroides strains as pretreatment plus CF or MF was required to convert GF rabbits to the normal state.
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Affiliation(s)
- M Yanabe
- Japan SLC, Inc., Shizuoka, Japan
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29
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Yanabe M, Shibuya M, Gonda T, Asai H, Tanaka T, Narita T, Sudo K, Itoh K. Establishment of specific pathogen-free rabbit colonies with limited-flora rabbits associated with conventional rabbit flora, and monitoring of their cecal flora. Exp Anim 1999; 48:101-6. [PMID: 10374071 DOI: 10.1538/expanim.48.101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
In the present study we attempted to establish specific-pathogen-free (SPF) rabbit breeding colonies with two groups of limited-flora (LF) rabbits, both ex-germfree rabbits, and their offspring. Two groups of LF rabbits associated with cecal flora of conventional (CV) rabbits produced in a previous study [Exp. Animals, submitted], were transferred to individual barrier rooms and some of the LF rabbits were accommodated in isolators to maintain the basic flora for SPF rabbits. The composition of the cecal flora of LF rabbits was stable for a long period; bacteroides remained predominant and clostridia dominant. From the SPF rabbits, different types of bacteria, e.g., enterobacteriaceae and streptococci, which could not be isolated in the isolator were detected at a low population level at an early stage in the establishment of the SPF colonies, but the basic composition of the cecal flora was mainly bacteroidaceae and clostridia and did not change over a long period, and the floral composition became similar to that of CV rabbits. The fertility and weaning rates of the SPF rabbits were satisfactory for a SPF rabbit colony. In addition, these SPF colonies were free of more than one year rabbit-specific pathogens.
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Affiliation(s)
- M Yanabe
- Japan SLC, Inc., Shizuoka, Japan
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Kawaguchi M, Koshimura K, Murakami Y, Tsumori M, Gonda T, Kato Y. Antihypertensive effect of insulin via nitric oxide production in the Zucker diabetic fatty rat, an animal model for non-insulin-dependent diabetes mellitus. Eur J Endocrinol 1999; 140:341-9. [PMID: 10097254 DOI: 10.1530/eje.0.1400341] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
It has been reported that insulin treatment improves hypertension in patients with diabetes mellitus. The mechanisms of the antihypertensive effect of insulin, however, remain to be fully elucidated. In the present study, we investigated a possible involvement of nitric oxide (NO) in insulin-induced reduction of blood pressure using the Zucker diabetic fatty (ZDF) rat, an animal model of non-insulin-dependent diabetes mellitus. The animals were divided into three groups and treated for 4 weeks with daily subcutaneous injections of insulin (25U/kg body weight) with or without oral administration of l-nitro-arginine methyl ester (L-NAME, 50mg/kg/day body weight as drinking water), an inhibitor of NO synthase (NOS). Saline solution was injected subcutaneously in the control groups. During the experimental period, body weight gain was greater in the insulin-treated groups than in the control groups whereas water intake was considerably decreased in the insulin-treated groups. Insulin treatment resulted in a decrease in plasma glucose and blood pressure, and an increase in both NO metabolites (NOx) in the plasma and NOS activity in the aorta tissue. L-NAME treatment blunted not only the antihypertensive effect of insulin but also the changes in NOx and NOS activity. These findings suggest that insulin reduces blood pressure in the ZDF rat by stimulating NOS activation and NO production.
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Affiliation(s)
- M Kawaguchi
- First Division, Department of Medicine, Shimane Medical University, Izumo, Japan
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Gonda T, Maouyo D, Rees SE, Montrose MH. Regulation of intracellular pH gradients by identified Na/H exchanger isoforms and a short-chain fatty acid. Am J Physiol 1999; 276:G259-70. [PMID: 9887003 DOI: 10.1152/ajpgi.1999.276.1.g259] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Colonic luminal short-chain fatty acids (SCFA) stimulate electroneutral sodium absorption via activation of apical Na/H exchange. HT29-C1 cells were used previously to demonstrate that transepithelial SCFA gradients selectively activate polarized Na/H exchangers. Fluorometry and confocal microscopy (with BCECF and carboxy SNARF-1, respectively) are used to measure intracellular pH (pHi) in HT29-C1 cells, to find out which Na/H exchanger isoforms are expressed and if results are due to pHi gradients. Inhibition of Na/H exchange by HOE-694 identified 1) two inhibitory sites [50% inhibitory dose (ID50) = 1.6 and 0.05 microM] in suspended cells and 2) one inhibitory site each in the apical and basolateral membranes of filter-attached cells (apical ID50 = 1.4 microM, basolateral ID50 = 0.3 microM). RT-PCR detected mRNA of Na/H exchanger isoforms NHE1 and NHE2 but not of NHE3. Confocal microscopy of filter-attached cells reported HOE-694-sensitive pHi recovery in response to luminal or serosal 130 mM propionate. Confocal analysis along the apical-to-basal axis revealed that 1) luminal or serosal propionate establishes transcellular pHi gradients and 2) the predominant site of pHi acidification and pHi recovery is the apical portion of cells. Luminal propionate produced a significantly greater acidification of the apical vs. basal portion of the cell (compared with serosal propionate), but no other dependence on the orientation of the SCFA gradient was observed. Results provide direct evidence for a subcellular response that assures robust activation of apical NHE2 and dampening of basolateral NHE1 during pHi regulation.
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Affiliation(s)
- T Gonda
- Departments of Medicine and Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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Akiyoshi H, Gonda T, Terada T. A comparative histochemical and immunohistochemical study of aminergic, cholinergic and peptidergic innervation in rat, hamster, guinea pig, dog and human livers. Liver 1998; 18:352-9. [PMID: 9831365 DOI: 10.1111/j.1600-0676.1998.tb00817.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
AIMS/BACKGROUND The mammalian liver receives both sympathetic and parasympathetic nerves that contain aminergic, cholinergic and peptidergic components. The intrahepatic distribution of nerve fibers are highly species-dependent; and also, even within one species, there are notable variations. To reveal the pattern and type of hepatic innervation in different species, we examined the distribution and density of these nerve fibers. METHODS The livers of rats, golden hamsters, guinea pigs, dogs and humans were used. Aminergic and peptidergic nerve fibers were identified by immunohistochemistry for tyrosine hydroxylase (TH), neuropeptide Y (NPY), substance P (SP), vasoactive intestinal polypeptide (VIP), calcitonin gene-related peptide (CGRP), and galanin (GAL), and cholinergic fibers were identified by the acetylcholinesterase (AChE) neurohistochemistry method. RESULTS AChE-, TH-, NPY-, CGRP-, VIP-, and SP-positive nerves were observed in the connective tissue of the portal region, and they were in close contact with hepatic arteries, portal veins and bile ducts in all five species. Within the parenchyma of guinea pig, dog and human livers, TH-, NPY- and SP-positive fibers were observed, but no AChE- and CGRP-positive fibers were observed. In rat and hamster livers, no parenchymal nerve fibers could be demonstrated, but CGRP-, NPY- and SP-positive fibers were observed in the border of periportal areas. The density of CGRP-positive nerve fibers were slightly higher around bile ducts than around hepatic arteries and portal veins. GAL-positive fibers were not detected in any animal. CONCLUSIONS These data indicate that there were differences in the patterns of hepatic innervation among rats, golden hamsters, guinea pigs, dogs and humans. The data also show that: 1) in rat and hamster livers, hepatic functions may be regulated by both sympathetic and parasympathetic nerves in the portal region; 2) in guinea pig, dog and human livers they may be regulated by these fibers both in the interlobular region (parasympathetic and sympathetic systems) and in the intraparenchymal region (sympathetic system); and thus, 3) in the latter three species, hepatocytes and sinusoidal cells may be innervated by sympathetic nerves.
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Affiliation(s)
- H Akiyoshi
- Second Department of Pathology, Faculty of Medicine, Tottori University, Japan
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Ishida H, Iwama T, Yoshinaga K, Gonda T, Idezuki Y. Bromodeoxyuridine uptake by early liver metastases in rats: a comparison of the hepatic artery and portal vein infusion routes. Surg Today 1998; 28:822-9. [PMID: 9719004 DOI: 10.1007/s005950050234] [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: 11/27/2022]
Abstract
Liver metastases generated by the intraportal inoculation of ascites hepatoma cells in Donryu rats were labeled with bromodeoxyuridine (BrdU) through the hepatic artery, or through the portal vein with or without ligation of the hepatic artery, 3, 6, or 9 days after tumor inoculation. The distribution of BrdU-labeled cells was evaluated in 174 metastases, 110-1640 microm in diameter, by immunohistochemical methods. When a dual blood supply from the portal vein and hepatic artery existed, the BrdU-labeled cells were diffusely found in the metastases regardless of their size and the route of BrdU infusion. When blood supply to metastases larger than 610 microm in diameter was from a single source, namely the portal vein, the BrdU-labeled cells were located within 90-290 microm from the margin of the metastases. These results indicate first, that drug uptake by the inner part of the early metastatic liver tumors is achieved through the hepatic artery, and second, that drug uptake by early liver metastases through the portal vein is limited to within the extent of portal diffusion regardless of the size of the metastases. Thus, we conclude that prophylactic treatment against liver metastases would be more effective when given via the hepatic artery route rather than via the portal vein route.
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Affiliation(s)
- H Ishida
- Department of Surgery, Saitama Medical Center, Saitama Medical School, Kawagoe, Japan
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Yoshinaga K, Iwama T, Ishida H, Hayashi T, Gonda T, Sugihara K. A simple method to avoid contamination while performing an immediate mucocutaneous suture of the intestinal stoma. Surg Today 1998; 28:475-7. [PMID: 9590725 DOI: 10.1007/s005950050169] [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: 02/07/2023]
Abstract
We herein report a simple method using intestinal clamps to prevent intraoperative contamination during an immediate mucocutaneous suture of the intestinal stoma. Using this technique, a protruded intestinal stoma can be constructed reliably without soiling. The technique can be used both for constructing an end as well as a loop intestinal stoma.
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Affiliation(s)
- K Yoshinaga
- Second Department of Surgery, Tokyo Medical and Dental University, Japan
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35
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Matsubara K, Gonda T, Sawada H, Uezono T, Kobayashi Y, Kawamura T, Ohtaki K, Kimura K, Akaike A. Endogenously occurring beta-carboline induces parkinsonism in nonprimate animals: a possible causative protoxin in idiopathic Parkinson's disease. J Neurochem 1998; 70:727-35. [PMID: 9453568 DOI: 10.1046/j.1471-4159.1998.70020727.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.2] [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: 02/06/2023]
Abstract
To examine whether simple beta-carbolines induce parkinsonian-like symptoms in vivo via N-methylation, the simple beta-carbolines norharman (NH), 2-mono-N-methylated norharmanium cation (2-MeNH+), and 9-mono-N'-methylnorharman (9-MeNH) were systematically administered to C57BL/6 mice for 7 days. These substances induced bradykinesia with reduction of locomotion activity. NH or 2-MeNH+ decreased dopamine (DA) contents to 50-70% of values in controls in the striatum and midbrain. 9-MeNH potently decreased not only DA but also serotonin content in various regions. Immunohistochemical examination revealed that the numbers of tyrosine hydroxylase (TH)-positive cells in the substantia nigra pars compacta of NH- and 9-MeNH-treated mice were diminished to 76 and 66% of values in control mice, respectively. The formation of a toxic metabolite, 2,9-di-N,N'-methylated norharmanium cation (2,9-Me2NH+), was 14 and eight times higher in the brain of mice receiving 9-MeNH than that in NH- and 2-MeNH+-treated mice, respectively. In cultured mesencephalic cells from rat embryo, 2,9-Me2NH+ selectively killed TH-positive neurons only at a lower dose but was toxic to all neurons at higher doses. Thus, the excess formation of 2,9-Me2NH+ would induce nonspecific neurotoxicity. These results indicated that 9-indole nitrogen methylation should be the limiting step in the development of the toxicity. NH, a selective dopaminergic toxin precursor, is sequentially methylated to form 2,9-Me2NH+, which could be an underlying factor in idiopathic Parkinson's disease.
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Affiliation(s)
- K Matsubara
- Department of Hospital Pharmacy and Pharmacology, Asahikawa Medical College, Japan
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36
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Shikimi T, Gonda T, Takahashi M, Kaneto H, Okunishi H, Takaori S. Ischemia induces a reduction in the content of ulinastatin-like substance in the murine hippocampus. Neurochem Res 1998; 23:69-72. [PMID: 9482269 DOI: 10.1023/a:1022453504527] [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: 02/06/2023]
Abstract
Effects of ischemia on the content of a ulinastatin (UT)-like substance in the murine cerebral cortex and hippocampus were studied. At 24 h post-ischemia, a significant (p < 0.05) decrease in the content of UT-like substance in the hippocampus but not the cerebral cortex and a concurrent increase in the activity of micro-calpain were observed. In in vitro experiments, a decrease was registered in the content of UT-like substance in the hippocampus in the presence of calcium. This decrease was inhibited by both EDTA and calpastatin treatments. These results implicate the destruction of UT-like substance by micro-calpain in the ischemic hippocampus.
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Affiliation(s)
- T Shikimi
- Department of Pharmacology, Shimane Medical University, Enya, Izumo, Japan
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37
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Kakizoe E, Kobayashi Y, Gonda T, Shimoura K, Hattori K, Okunishi H. Synergistic interactions between neuropeptide and histamine on the capillary permeability in rat skin: evaluation by reflectance spectrophotometry. Microvasc Res 1997; 54:27-34. [PMID: 9245641 DOI: 10.1006/mvre.1997.2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Effects of neuropeptides on capillary permeability and their interactions with histamine (HIS) in rat skin were investigated. The capillary permeability was measured continuously by reflectance spectrophotometry after intravenous (iv) injection of Evans blue dye. The capillary permeability was increased dose-dependently by the intradermal injection of HIS (0.3-100 microg/site) and substance P (SP; 25-250 ng/site). Calcitonin gene-related peptide (80-800 ng/site) elicited a significant but less increase than did SP. Capsaicin (30 microg/site) also increased capillary permeability slightly but significantly, suggesting the release of endogenous neuropeptides. Both diphenhydramine (DPH; 3 mg/kg, iv) and cimetidine (CIM; 30 mg/kg, iv) reduced HIS-induced responses. DPH also reduced the SP-induced response significantly, but CIM did not. An SP antagonist, [D-Pro2, D-Trp7,9]-SP (1.3 mg/kg, iv), reduced not only SP- but also HIS-induced responses. Furthermore, the HIS-induced response was attenuated by pretreatment with epicutaneous capsaicin for 4 days, depleting endogenous SP. These results delineate the synergistic interactions between SP and HIS in rat skin and suggest the participation of neuropeptides in increasing capillary permeability.
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Affiliation(s)
- E Kakizoe
- Department of Pharmacology, Shimane Medical University, Izumo, 693, Japan
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Matsubara K, Idzu T, Kobayashi Y, Gonda T, Okunishi H, Kimura K. Differences in dopamine efflux induced by MPP+ and beta-carbolinium in the striatum of conscious rats. Eur J Pharmacol 1996; 315:145-51. [PMID: 8960877 DOI: 10.1016/s0014-2999(96)00630-9] [Citation(s) in RCA: 14] [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: 02/03/2023]
Abstract
The effects of N-methyl-4-phenylpyridinium cation (MPP+) and of an endogenously formed analog, 2,9-di-methyl-norharmanium cation (2,9-Me2NH+), on extracellular dopamine were studied in the striatum of freely moving rats. Perfusion of either 2,9-Me2NH+ or MPP+ through a microdialysis probe evoked a marked and dose-dependent increase of dopamine levels. Tetrodotoxin and Ca(2+)-free medium prevented the increase in dopamine levels induced by 2,9-Me2NH+, but not that induced by MPP+. Cocaine, 3 microM, intensified the 2,9-Me2 NH(+)-induced increase in extracellular dopamine and slightly attenuated the MPP(+)-induced efflux. S(-)-3-(3-Hydroxy-phenyl)-N-propylpiperidine, that acts as an antagonist of dopamine autoreceptors in the presence of a dopamine reuptake inhibitor, markedly enhanced the increase in extracellular dopamine elicited by 2,9-Me2NH+, but not that by MPP+. These results suggested that 2,9-Me2NH+ was a potent dopamine reuptake blocker, whereas MPP+ acts as an amphetamine-like dopamine releaser rather than a reuptake inhibitor on the membrane transporter.
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Affiliation(s)
- K Matsubara
- Department of Legal Medicine, Shimane Medical University, Izumo, Japan
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Gonda T, Ishida H, Hojo I, Ando M, Fukunari H. [A case of Borrmann type 4 gastric cancer successfully treated with MTX and 5-FU therapy through the hepatic artery]. Gan To Kagaku Ryoho 1996; 23:1561-3. [PMID: 8854805] [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: 02/02/2023]
Abstract
A 73-year-old male was diagnosed as having a Borrmann type 4 gastric cancer with multiple liver metastases. Total gastrectomy (D2) with hepatic arterial cannulation was performed. Hepatic arterial infusion therapy of MTX (50 mg or 100 mg/body) and 5-FU (500 mg or 750 mg/body) was started postoperatively. A total dose of 1,150 mg of MTX and 6,250 mg of 5-FU caused a marked decrease in the volume of liver metastases and the effect remained for 8 months (partial response). Regarding drug concentrations, serum MTX levels rapidly decreased after bolus injection through hepatic artery and corresponded to those of intravenous injection as reported elsewhere. Serum 5-FU levels were maintained as low as 1.2 micrograms/ml during 2-hr continuous infusion and rapidly decreased after the end of the infusion. These results indicate that hepatic arterial infusion therapy of MTX and 5-FU may be safe and feasible for multiple liver metastases of Borrmann type 4 gastric cancer.
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Affiliation(s)
- T Gonda
- Dept. of Surgery, Niigata Prefectural Tokamachi Hospital
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40
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Abstract
Although dividing the posterior communicating artery (PComA) during surgery has been criticized for increasing the risk of ischaemia, this procedure increase working space improving visibility and the ability to manipulate during treatment of basilar tip aneurysms via the pterional approach. We divided a hypoplastic PComA in 4 of our cases of basilar tip aneurysm. This was necessary because either (1) the length of the PComA and intracranial internal carotid artery (ICA) limited medial retraction of the ICA and access to the basilar bifurcation region, or (2) the PComA and its perforators ran just in front of the aneurysm, interfering with its exposure. We were able to clip the aneurysm neck in all four patients, three of whom had complications including temporary impairment of consciousness, ocular movement disorders and altered sensation in the extremities. Patients with complications showed transient hypersomnolence immediately after surgery; computed tomography showed small thalamic infarctions. However, in two of three patients the ischaemic events occurred contralateral to the side of PComA section. All patients regained consciousness within a week and were discharged with mild ocular movement palsies. In our cases except one with ischaemic complications, thalamic infarction probably resulted from thalamo-perforating artery injury when the aneurysm neck was clipped, rather than tuberothalamic artery injury due to section of the PComA. Taking previous reports and our results into consideration, we believe that division of a hypoplastic PComA is a safe procedure in particular cases when the grade of subarachnoid haemorrhage is not poor and there are no cerebrovascular risk factors, although we realize it is desirable to preserve normal blood flow.
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Affiliation(s)
- S Inao
- Department of Neurosurgery, Nagoya University School of Medicine, Japan
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41
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Li SH, Kobayashi Y, Yamauchi Y, Gonda T, Tsunematsu T. Suppressive effects of a herbal formula, TBL-1, on type II collagen-induced arthritis in DBA/1J mice. Clin Exp Pharmacol Physiol 1996; 23:236-40. [PMID: 8934614 DOI: 10.1111/j.1440-1681.1996.tb02602.x] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
1. The effects of a formula of traditional Chinese medicine, TBL-1, on collagen-induced arthritis (CIA) were investigated in DBA/1J mice. 2. From 4 weeks after the first immunization with bovine type II collagen (CII), TBL-1 or indomethacin was administered orally for 13 weeks. 3. Clinical scores of CIA were decreased by both TBL-1 and indomethacin intervention compared with the control CII-immunized group. 4. Radiographic scores of phalangeal destruction were markedly improved by TBL-1 intervention (P < 0.001), but indomethacin failed. 5. The suppressive effects of TBL-1, but not indomethacin, were manifested in reduced serum anti-CII antibody titres (P < 0.001). 6. These findings suggest that TBL-1 may play a role in regulating some immune responses in the present arthritis model.
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Affiliation(s)
- S H Li
- Department of Pharmacology, Shimane Medical University, Izumo, Japan
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42
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Ishida H, Iwama T, Gonda T, Higuchi T, Nakajima H, Hojo I, Yoshinaga K, Mishima Y, Ando M, Yamada H, Fukunari H, Okubo Y. Significance of Carcinoembryonic Antigen(CEA) Level Determination in Drainage Venous Blood in Predicting Liver Metastases of Colorectal Cancer. ACTA ACUST UNITED AC 1996. [DOI: 10.3862/jcoloproctology.49.288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gonda T, Ago A, Akiyoshi H, Ichihara K. [Peptidergic nerve distribution in the gallbladder in cholelithiasis]. J Smooth Muscle Res 1995; 31:515-8. [PMID: 8867991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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Ago A, Gonda T, Kawakami K, Sahata H. [Morphological studies on preputial gland of mice--1. Light and transmission electron microscopic observations of preputial gland in male mice]. Exp Anim 1995; 43:645-9. [PMID: 7498328] [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: 01/25/2023] Open
Abstract
Male BALB/c mice isolated after weaning were housed two mice per cage at the age of 10 weeks. After 1 week, each pair of mice was observed for social dominance, and compared with control mice kept in isolation. The preputial gland in the socially dominant animal was histologically examined. The preputial gland consisted of a congregation of branched simple tubuloacinar gland and typical holocrine secretion on morphological examination. Acinar cells in the dominant animals were large, multiplicative and hypertrophic compared with those of controls and subordinates. Dominant animals required copious secretion for attainment and maintenance of a dominant social position. Acinar cells of subordinates were very small, flattened and atrophied because fatty secretion particles filled the luminal duct. These accumulated secretion particles pressed the acinar cells and caused degeneration. Not only luminal acinar cells but also central acinar cells and some basal acinar cells were degenerated. Electron micrographs showed that basal acinar cells in dominant animals contained many mitochondria, agranular endoplasmic reticulum and free ribosomes in the cytoplasm, whereas those of subordinates contained myelin bodies and lipid droplets. Therefore, it is suggested that the synthesis of secretion particles in acinar cells of subordinates hardly occurred.
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Affiliation(s)
- A Ago
- Institute of Experimental Animals, Shimane Medical University, Japan
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45
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Kawakami K, Ago A, Gonda T. [Behavioral characteristics of open-field activities in NOD mice]. Exp Anim 1995; 43:765-8. [PMID: 7498345 DOI: 10.1538/expanim1978.43.5_765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The open-field test was carried out on NOD mice of both sexes between the ages of 40 to 300 days. The behavior of both sexes of mouse was observed for 3-minute periods with an interval of 20 days. The mean scores of ambulation and rearing increased at the ages of 40-80 days old, and both scores decreased more than 100 days old. The onset of overt diabetes (DM) in female mice were observed after 120 days old. After the onset of DM with great loss of body weight, the scores of ambulation and rearing were dramatically decreased. Other parameters, urination, defecation, and preening were not changed with age of both sexes. These data suggest that conspicuous weight loss with the expression of overt diabetes in NOD female mouse might correlate to decrease of the ambulation and rearing scores.
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Affiliation(s)
- K Kawakami
- Institute of Experimental Animals, Shimane Medical University, Japan
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Gonda T, Akiyoshi H, Ichihara K. Scanning electron microscopic observations of nerves in the guinea-pig gallbladder after an acetylcholinesterase histochemistry. J Smooth Muscle Res 1995; 31:153-62. [PMID: 8589503 DOI: 10.1540/jsmr.31.153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Three-dimensional structures of the nerves of the guinea-pig gallbladder, after histochemical demonstration of the acetylcholinesterase activity and HCl hydrolysis-collagenase digestion, were examined by scanning electron microscope. HCl-collagenase digestion facilitated easy identification of silver- and gold-intensified acetylcholinesterase-positive nerve fibers at a high accelerating voltage (25 kV), due to their strong reflection image. Ganglia were either triangular or ovoidal in shape. Dense para- and peri-vascular nerve fibers occurred around the cystic artery. There were a few intramuscular nerve fibers with varicosity-like structures among smooth muscle bundles. Dense branched and tapering nerve fibers with varicosities in the lamina propria mucosae were closely attached to epithelial cells. The acetylcholinesterase-positive fibers in the lamina propria and peri- and para-vascular nerves, and fewer positive fibers in the smooth muscle layer probably represent cholinergic nerves involved in the concentration of biliary compounds and lesser in the motor function of the smooth muscle.
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Affiliation(s)
- T Gonda
- Institute of Experimental Animals, Shimane Medical University, Izumo, Japan
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Gonda T, Akiyoshi H, Ichihara K. Hyperplastic innervation of vasoactive intestinal peptide in human gallbladder with cholelithiasis. Histol Histopathol 1995; 10:669-72. [PMID: 7579816] [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: 01/26/2023]
Abstract
The vasoactive intestinal peptide (VIP) immunoreactive nerve fibres in the gallbladder from 14 human patients with cholelithiasis was examined by immunohistochemical method. In the chronic cholecystitis, hyperplastic VIP immunoreactive nerves were observed around the hypertrophied muscle bundles, Rokitansky Aschoff Sinus and in the mucosal layer. However, in the acute cholecystitis and gangrenous cholecystitis, reduction or disappearance of VIP nerve fibres was observed. These reductions or disappearances of VIP immunoreactive nerves may secondly result from severe tissue damage. These results suggest that hyperplastic VIP nerves cause gallbladder relaxation, stasis and mucosal fluid unbalance, which may closely correlate to gallstone formation.
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Affiliation(s)
- T Gonda
- Department of Pathology, Faculty of Medicine, Tottori University, Yonago, Japan
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48
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Gonda T, Kobayashi Y, Matsubara K, Hattori K. Changes of tyrosine hydroxylase immunoreactive nerve fibers in the stress induced gastric mucosa. Pathophysiology 1994. [DOI: 10.1016/0928-4680(94)90916-4] [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: 11/30/2022] Open
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49
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Gonda T, Ando A, Oki M. [Use of ultrasonic generator for preparing skeletal specimens in combination with papain]. Kaibogaku Zasshi 1994; 69:706-7. [PMID: 7847052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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50
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Gonda T, Ishida H, Higuchi T, Hirukawa H, Nakajima H, Hojo I, Mishima Y. [A case of AFP (alpha-fetoprotein) producing gastric cancer successfully treated with EAP (etoposide, adriamycin, cisplatin) therapy]. Gan To Kagaku Ryoho 1994; 21:1659-63. [PMID: 7520221] [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: 01/25/2023]
Abstract
A case of AFP producing gastric cancer successfully treated with EAP therapy is reported with a review of the literature. A 56-year-old male was admitted complaining of epigastralgia and back pain. He was diagnosed as having a gastric cancer with multiple liver metastases by endoscopy and computed tomography. Serum AFP level was 2,791,000 ng/ml and biopsy specimen showed AFP-positive tumor cells by PAP (peroxidase-antiperoxidase) method in hepatoid structure. Preoperative combination chemotherapy with etoposide, adriamycin and cisplatin resulted in a remarkable decrease in serum AFP level. Subtotal gastrectomy (R3) with hepatic artery cannulation was performed. The therapeutic effect by histological examination showed Grade 3 in the primary site and Grade 2 in both resional lymph nodes and liver metastasis.
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Affiliation(s)
- T Gonda
- Dept. of Surgery, Niigata Prefectural Tokamachi Hospital
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