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Otsubo O, Yamada Y, Kuzuhara K, Sugimoto H, Kusaba R, Takahashi I, Muto M, Dohi T, Horiuchi T, Watanabe T, Yanagisawa T, Nozaki S, Uchima T, Seo S, Awata R, Nakamoto S. Tsunamasa Inou: A Pioneer in Artificial Organs and Transplantation in Japan. Artif Organs 2017; 41:881-884. [PMID: 28990711 DOI: 10.1111/aor.13044] [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: 11/28/2022]
Affiliation(s)
- Osamu Otsubo
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo.,Tohto College of Health Sciences
| | - Yutaka Yamada
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Keihachiro Kuzuhara
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Hisayuki Sugimoto
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Ryosuke Kusaba
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Ikuo Takahashi
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Makoto Muto
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Takeyoshi Dohi
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Takashi Horiuchi
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Toshifumi Watanabe
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Takayoshi Yanagisawa
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Shigeharu Nozaki
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Takao Uchima
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Shinichi Seo
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Ryoichi Awata
- Department of Artificial Organs and Organ Transplantation, Institute of Medical Science, the University of Tokyo
| | - Satoru Nakamoto
- Head of Artificial Kidney Department and Co-director of Kidney Transplant Program (1967-1991), Cleveland Clinic Foundation
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Weems YS, Nett TM, Rispoli LA, Davis TL, Johnson DL, Uchima T, Raney A, Lennon E, Harbert T, Bowers G, Tsutahara N, Randel RD, Weems CW. Effects of prostaglandin E and F receptor agonists in vivo on luteal function in ewes. Prostaglandins Other Lipid Mediat 2010; 92:67-72. [PMID: 20381634 DOI: 10.1016/j.prostaglandins.2010.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2010] [Revised: 03/24/2010] [Accepted: 03/29/2010] [Indexed: 10/19/2022]
Abstract
Loss of progesterone secretion at the end of the estrous cycle is via uterine PGF(2alpha) secretion; however, uterine PGF(2alpha) is not decreased during early pregnancy in ewes to prevent luteolysis. Instead the embryo imparts resistance to PGF(2alpha)-induced luteolysis, which is via the 2-fold increase in prostaglandins E(1) and E(2) (PGE(1), PGE(2); PGE) in the endometrium during early pregnancy. Chronic intrauterine infusion of PGE(1) or PGE(2) prevents spontaneous or an estradiol-17beta, IUD, or PGF(2alpha)-induced luteolysis. Four PGE receptor subtypes (EP(1), EP(2), EP(3), and EP(4)) and an FP receptor specific for PGF(2alpha) have been identified. The objective of this experiment was to determine the effects of EP(1), EP(2), EP(3), or FP receptor agonists in vivo on luteal mRNA for LH receptors, occupied and unoccupied LH receptors, and circulating progesterone in ewes. Ewes received a single treatment of 17-phenyl-tri-Nor-PGE(2) (EP(1), EP(3)), butaprost (EP(2)), 19-(R)-OH-PGE(2) (EP(2)), sulprostone (EP(1), EP(3)), or PGF(2alpha) (FP) receptor agonists into the interstitial tissue of the ovarian vascular pedicle adjacent to the luteal-containing ovary. 17-Phenlyl-tri-Nor-PGE(2) had no effect (P> or =0.05) on any parameter analyzed. Butaprost and 19-(R)-OH-PGE(2) increased (P< or =0.05) mRNA for LH receptors, occupied and unoccupied LH receptors, and circulating progesterone. Both sulprostone and PGF(2alpha) decreased (P< or =0.05) mRNA for LH receptors, occupied and unoccupied LH receptors, and circulating progesterone. It is concluded that both EP(3) and FP receptors may be involved in luteolysis. In addition, EP(2) receptors may mediate prevention of luteolysis via regulation of luteal mRNA for LH receptors to prevent loss of occupied and unoccupied LH receptors and therefore to sustaining luteal function.
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Affiliation(s)
- Y S Weems
- Department of HNFAS, University of Hawaii, 1955 East-West Road, Honolulu, HI 96822, USA.
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Weems YS, Lennon E, Uchima T, Raney A, Goto K, Ong A, Zaleski H, Weems CW. Is nitric oxide luteolytic or antiluteolytic? Prostaglandins Other Lipid Mediat 2005; 78:129-38. [PMID: 16303611 DOI: 10.1016/j.prostaglandins.2005.06.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2005] [Revised: 05/28/2005] [Accepted: 06/02/2005] [Indexed: 11/30/2022]
Abstract
Nitric oxide (NO) has been reported to be luteolytic based on treatment of cows in vivo with an inhibitor of nitric oxide synthase (NOS-produces NO), which delayed the decline in progesterone by two to three days [Jaroszewki J, Hansel, W. Intraluteal administration of a nitric oxide synthase blocker stimulates progesterone, oxytocin secretion and prolongs the life span of the bovine corpus luteum. Proc Soc Exptl Biol Med 2000;224:50-5; Skarzynski D, Jaroszewki J, Bah, M, et al. Administration of nitric oxide synthase inhibitor counteracts prostaglandin F(2alpha)-induced luteolysis in cattle. Biol Reprod 2003;68:1674-81]. The objective of this experiment was to determine the effect of a long acting NO donor or a NOS inhibitor infused chronically into the interstitial tissue of the ovarian vascular pedicle adjacent to the ovary with a corpus luteum on secretion of progesterone during the ovine estrous cycle. Ewes were treated either with Vehicle (N=5); Diethylenetriamine (DETA-control for DETA-NONOate; N=5); (Z)-1-[2-(2-aminoethyl)-N-(2-ammonioethyl) amino]diazen-1-ium-1,2-diolate (DETA-NONOate-long acting NO donor; N=6); or l-nitro-arginine methyl ester (l-NAME-NOS inhibitor; N=6) every 6 h from 24:00 h (0 h) on day 8 through 18:00 h on day 18 of the estrous cycle. Jugular venous blood was collected every 6h for analysis for progesterone and corpora lutea were collected at 18:00 h on day 18 and weighed. Weights of corpora lutea were heavier (P< or =0.05) in DETA-NONOate-treated ewes when compared to Vehicle, DETA, or l-NAME-treated ewes, which did not differ amongst each other (P> or =0.05). Profiles of progesterone in jugular venous blood on days 8-18 differed (P< or =0.05) in DETA-NONOate-treated ewes when compared to Vehicle, DETA, or l-NAME-treated ewes did not differ (P> or =0.05) amongst each other. It is concluded that NO is not luteolytic during the ovine estrous cycle, but may instead be antiluteolytic and prevent luteolysis.
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Affiliation(s)
- Y S Weems
- Department of Human Nutrition, Food, and Animal Sciences, University of Hawaii, Honolulu, HI 96822, USA
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Tsuchiya T, Ikarashi Y, Hata H, Toyoda K, Takahashi M, Uchima T, Tanaka N, Sasaki T, Nakamura A. Comparative studies of the toxicity of standard reference materials in various cytotoxicity tests and in vivo implantation tests. J Appl Biomater 1999; 4:153-6. [PMID: 10171665 DOI: 10.1002/jab.770040206] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Polyurethane films that contained various amounts of zinc diethyldithiocarbamate (ZDEC) and zinc dibutyldithiocarbamate (ZDBC) were prepared as standard reference materials (SRM). Using three cell lines of V79, L929, and Balb/3T3 cells, the cytotoxicity of the dithiocarbamates and the SRM films were compared by agar diffusion assay, filter diffusion assay, neutral red assay, cell growth assay, and colony assay. Among these in vitro cytotoxicity tests, colony assay was found to be the most sensitive method for detecting the cytotoxicity. The cytotoxic potentials of extracts from SRM films correlated well with the concentrations of ZDEC or ZDBC involved in SRM. When various rubber materials including SRM and surgical rubber latex materials were tested, cytotoxic potentials of these extracts were also correlated with the inflammatory tissue capsule thickness in short-term implantation tests. On the basis of these results, the SRM is judged to be useful for validating test sensitivity, and comparing the correlation between in vitro and in vivo responses.
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Affiliation(s)
- T Tsuchiya
- National Institute of Hygienic Sciences, Tokyo, Japan
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Ikarashi Y, Toyoda K, Ohsawa N, Uchima T, Tsuchiya T, Kaniwa M, Sato M, Takahashi M, Nakamura A. Comparative studies by cell culture and in vivo implantation test on the toxicity of natural rubber latex materials. J Biomed Mater Res 1992; 26:339-56. [PMID: 1613025 DOI: 10.1002/jbm.820260306] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Colony assay using V79 cells, the agar diffusion assay with L929 cells, and the 7-day rabbit muscle implantation test were employed to evaluate the cytotoxicity and tissue toxicity of natural rubber latex (NRL) materials. The in vivo implantation test showed that, among 13 histological parameters, thickness of inflammatory layer was the most useful index to evaluate tissue responses quantitatively. A comparison of the in vivo and in vitro parameters revealed the following correlations between the thickness of the inflammatory layer and cytotoxicity indices: Colony assay of the extracts, IC50: r = 0.80; Agar diffusion assay, Zone index: r = 0.73; Lysis index: r = 0.61. From these results, it appears that the colony assay provides a more reliable prediction of the tissue response than the agar diffusion assay.
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Affiliation(s)
- Y Ikarashi
- National Institute of Hygienic Sciences, Tokyo, Japan
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Bouet T, Toyoda K, Ikarashi Y, Uchima T, Nakamura A, Tsuchiya T, Takahashi M, Eloy R. Evaluation of biocompatibility, based on quantitative determination of the vascular response induced by material implantation. J Biomed Mater Res 1991; 25:1507-21. [PMID: 1794998 DOI: 10.1002/jbm.820251208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The biocompatibility of nine different materials, including positive and negative references, 4 polyurethane based and 3 latex based materials was investigated by (1) cytotoxic assay using V79 chinese hamster cells, (2) the thickness of inflammatory layer at 3 and 7 days after intramuscular implantation test, and (3) the course of the blood flow in tissue reaction around subcutaneously implanted materials using Laser Doppler Flowmetry (LDF) over 14 days following implantation. In addition, for some materials, different modes of sterilization were compared. Although the three methods explore different reactive systems, the material ranking obtained was highly similar for the three methods, suggesting a relative accuracy between them. For one latex however, an absence of cytotoxic effect in culture and a highly intense response by LDF investigation of the same order of magnitude as for the positive reference implant suggest that bioincompatibility may result from the material itself and cannot be exclusively investigated by the leaching of toxic components.
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Affiliation(s)
- T Bouet
- Unité 37 INSERM, Bron, France
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Nakamura A, Ikarashi Y, Tsuchiya T, Kaniwa MA, Sato M, Toyoda K, Takahashi M, Ohsawa N, Uchima T. Correlations among chemical constituents, cytotoxicities and tissue responses: in the case of natural rubber latex materials. Biomaterials 1990; 11:92-4. [PMID: 2397269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Natural rubber latex films obtained from 40 different brands of rubber gloves were tested by quantitative chemical analyses, two cytotoxicity tests (agar-diffusion assay using L929 cells and colony assay using V79 cells) and 7-day implantation test in the rabbit muscle. Multiple regression analysis of these data showed that dithiocarbamate accelerators caused the toxicities whereas antioxidants did not. Thickness of inflammatory layer was the most useful parameter to evaluate tissue response among 13 histological parameters investigated. There were good correlations between the cytotoxicity indices and the thickness of inflammatory layer.
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Affiliation(s)
- A Nakamura
- National Institute of Hygienic Sciences, Tokyo, Japan
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