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Mochizuki H, Watanabe T, Komeyama S, Hada T, Seguchi O, Fujita T, Tsukamoto Y. Clinical Value of Newly Detected Donor−Specific HLA Antibodies for Predicting the Development of Pathological Antibody Mediated Rejection. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Hada T, Seguchi O, Komeyama S, Mochizuki H, Watanabe T, Fukushima S, Fujita T, Tsukamoto Y. Heart Transplantation Using Super Aged Donors at 65 Years and Over. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Andou M, Yanai S, Hada T, Kanno K, Sakate S, Sawada M, Kato K, Shimada K, Yoshino Y. Management for Ureteral Injury during Laparoscopic or Robotic Hysterectomy: Minimally Invasive Strategies. J Minim Invasive Gynecol 2022. [DOI: 10.1016/j.jmig.2022.09.244] [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: 11/26/2022]
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Komeyama S, Watanabe T, Yamagata K, Iwasaki Y, Hada T, Shimojima M, Mochizuki H, Tadokoro N, Kainuma S, Tsukamoto Y, Seguchi O, Fukushima S, Kusano K, Fujita T, Fukushima N. Successful Recovery from Refractory Hypoxia Due to Right-to-Left Shunting Associated with Iatrogenic Atrial Septal Defect After Catheter Ablation in a Patient with a Left Ventricular Assist Device. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1731] [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: 12/01/2022] Open
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Iwasaki Y, Seguchi O, Komeyama S, Hada T, Shimojima M, Mochizuki H, Watanabe T, Tsukamoto Y, Tadokoro N, Kainuma S, Fukushima S, Fujita T, Fukushima N. Two Cases of BK Polyoma Virus Nephropathy in Patients with Isolated Heart Transplantation: Clinical Usefulness of Urinary Cytology. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1427] [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: 10/18/2022] Open
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Andou M, Kanno K, Sakate S, Sawada M, Yanai S, Hada T. Colostomy-Free Bowel Injury Repair. J Minim Invasive Gynecol 2021. [DOI: 10.1016/j.jmig.2021.09.438] [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]
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Andou M, Yanai S, Kanno K, Sakate S, Sawada M, Hada T. Laparoscopic Extraperitoneal Total Retroperitoneal Dissection- the Right Approach. J Minim Invasive Gynecol 2021. [DOI: 10.1016/j.jmig.2021.09.012] [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: 11/16/2022]
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Chau JK, Bilgic E, Hada T, Trepanier M, Naghawi H, Kaneva P, Mueller C, Lee L. Development and validation of a transanal endoscopic rectal purse string simulator. Tech Coloproctol 2020; 24:863-871. [PMID: 32504373 DOI: 10.1007/s10151-020-02251-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 05/25/2020] [Indexed: 01/02/2023]
Abstract
BACKGROUND Rectal purse string placement for transanal mesorectal excision is challenging, and practice is difficult. The objective of this study is to build an endoscopic rectal purse string simulator and provide evidence for the validity of its use. METHODS A low-cost transanal endoscopic rectal purse string simulator was created and used to measure the performance of participants. Participants included general surgery residents, fellows, and staff surgeons from several Canadian university-affiliated institutions across Canada. The performance of the rectal purse string placement was measured by the time to completion of the task as well scoring with a modified objective structured assessment of technical skills (OSATS) score and a modified advanced laparoscopic suturing (ALS) score. RESULTS Thirty-nine participants were recruited into the study. Participants were split into three groups, based on prior experience with laparoscopic suturing, for the analysis of suturing a rectal purse string on the simulator based on three performance measures. There was a significant difference found in all three measures of performance in the three groups (time to completion p = 0.014, mean blinded OSATS score p = 0.007, mean blinded ALS score p = 0.020). Participants with previous laparoscopic suturing had significantly faster times to completion and higher skills scores when compared to residents (time: 5.1 ± 1.4 min vs 9.0 ± 4.8 min, p = 0.005; OSATS: 19.7 ± 2.8 vs 13.0 ± 5.8, p = 0.00398, ALS: 27.4 ± 4.0 vs 18.9 ± 8.5, p = 0.0151). CONCLUSIONS A transanal endoscopic purse string simulator was constructed and preliminary testing has shown variable performance based on prior laparoscopic suturing experience.
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Affiliation(s)
- J K Chau
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada.,Department of Surgery, Centre for Colon and Rectal Surgery, McGill University Health Centre, Montreal, QC, Canada
| | - E Bilgic
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada.,Steinberg Centre for Simulation and Interactive Learning, McGill University, Montreal, QC, Canada
| | - T Hada
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada
| | - M Trepanier
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada
| | - H Naghawi
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada
| | - P Kaneva
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada
| | - C Mueller
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada
| | - L Lee
- Department of Surgery, Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, 1001 Decarie Boulevard, DS1-3310, Montreal, QC, H4A 3J1, Canada. .,Department of Surgery, Centre for Colon and Rectal Surgery, McGill University Health Centre, Montreal, QC, Canada.
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Oyama K, Kanno K, Ichikawa F, Nimura R, Matsumoto T, Kojima R, Shirane A, Yanai S, Nakajima S, Ebisawa K, Hada T, Ota Y, Andou M. Laparoscopic Training Using the Human “Mirror Neuron System”. J Minim Invasive Gynecol 2017. [DOI: 10.1016/j.jmig.2017.08.318] [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: 10/18/2022]
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Shinohara S, Tanikawa T, Hada T, Funaki I, Nishida H, Matsuoka T, Otsuka F, Shamrai KP, Rudenko TS, Nakamura T, Mishio A, Ishii H, Teshigahara N, Fujitsuka H, Waseda S. High-Density Helicon Plasma Sources: Basics and Application to Electrodeless Electric Propulsion. Fusion Science and Technology 2017. [DOI: 10.13182/fst13-a16896] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Shinohara
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
| | - T. Tanikawa
- Tokai University, 4-1-1, Kita-kaname, Hiratsuka, Kanagawa 259-1292, Japan
| | - T. Hada
- Kyushu University, 6-1, Kasuga Koen, Kasuga, Fukuoka 816-8580, Japan
| | - I. Funaki
- Institute of Space and Astronautical Science, 3-1-1, Yoshinodai, Sagamihara, Kanagawa 252-5210, Japan
| | - H. Nishida
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
| | - T. Matsuoka
- Institute of Space and Astronautical Science, 3-1-1, Yoshinodai, Sagamihara, Kanagawa 252-5210, Japan
| | - F. Otsuka
- Kyushu University, 6-1, Kasuga Koen, Kasuga, Fukuoka 816-8580, Japan
| | - K. P. Shamrai
- Institute of Nuclear Research, 47 Prospect Nauki, Kiev 03680, Ukraine
| | - T. S. Rudenko
- Institute of Nuclear Research, 47 Prospect Nauki, Kiev 03680, Ukraine
| | - T. Nakamura
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
| | - A. Mishio
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
| | - H. Ishii
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
| | - N. Teshigahara
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
| | - H. Fujitsuka
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
| | - S. Waseda
- Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Tokyo 184-8588, Japan
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Shirane A, Andou M, Kanno K, Yanai S, Nakajima S, Kurotsuchi S, Hada T, Ota Y. The Supreme Training of Laparoscopic Suture and Ligation – Go Beyond Your Limit. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.524] [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: 11/16/2022]
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Kanno K, Andou M, Hada T, Shirane A, Yanai S, Nakajima S, Ebisawa K, Kurotsuchi S, Ota H. Direct Vision Box Training for Surgical Trainees with Little or No Prior Laparoscopic Experience. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.495] [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: 11/26/2022]
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Hada T, Takahashi H, Kamijo S, Ikeda M, Kitamura T, Higuchi S, Suzuki T. Effect of CAD/CAM fabricated framework on complete denture deformation. Dent Mater 2016. [DOI: 10.1016/j.dental.2016.08.048] [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: 10/20/2022]
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Matsui K, Terada M, Tominaga K, Shigenobu Y, Nishigami T, Uematsu K, Hada T. A case of malignant fibrous histiocytoma on the knee joint in a patient with rheumatoid arthritis. Mod Rheumatol 2014; 11:242-5. [DOI: 10.3109/s101650170012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Takano M, Andou M, Kanao H, Kurotsuchi S, Oota Y, Hada T, Ebisawa K, Fujiwara K. The Needlescopic TLH Painless, Scarless Operation. J Minim Invasive Gynecol 2013. [DOI: 10.1016/j.jmig.2013.08.097] [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: 10/26/2022]
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Kennel CF, Edmiston JP, Hada T. A Quarter Century of Collisionless Shock Research. Collisionless Shocks in the Heliosphere: A Tutorial Review 2013. [DOI: 10.1029/gm034p0001] [Citation(s) in RCA: 174] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Maeda N, Kokai Y, Hada T, Yoshida H, Mizushina Y. Oral administration of monogalactosyl diacylglycerol from spinach inhibits colon tumor growth in mice. Exp Ther Med 2012; 5:17-22. [PMID: 23251235 PMCID: PMC3524182 DOI: 10.3892/etm.2012.792] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Accepted: 10/02/2012] [Indexed: 01/04/2023] Open
Abstract
Previously, we observed that purified monogalactosyl diacylglycerol (MGDG), a major glycoglycerolipid from spinach, selectively inhibits the activities of mammalian replicative DNA polymerases (α, δ and ε). However, the function of MGDG following ingestion is not well-known. In the present study, spinach MGDG suppressed the proliferation of Colon26 mouse colon cancer cells with an LD50 of 24 μg/ml in vitro. γ-cyclodextrin (CD)-MGDG complex was prepared and administered orally following Colon26 mouse tumor adhesion for 26 days. It was observed that 20 mg/kg equivalent (eq.) of the CD-MGDG complex reduced tumor volume by ∼60% compared with that of the vehicle-treated controls. In immunohistochemical analysis, the CD-MGDG complex group showed a decreased number of proliferating cell nuclear antigen (PCNA)-positive cells and reduction of mitosis in the tumor cells compared with the control group. In addition, the CD-MGDG complex increased the number of terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL)-positive apoptotic cells and inhibited CD31-positive tumor blood vessel growth significantly. These results suggest that MGDG has the potential for cancer prevention and health promotion.
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Affiliation(s)
- Naoki Maeda
- Laboratory of Food and Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Kobe, Hyogo 651-2180
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Hada T, Andou M, Kanao H, Ota Y, Takaki Y, Kobayashi E, Nagase T, Fujiwara K. Vaginal cuff dehiscence after total laparoscopic hysterectomy: examination on 677 cases. Asian J Endosc Surg 2011; 4:20-5. [PMID: 22776170 DOI: 10.1111/j.1758-5910.2010.00065.x] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
INTRODUCTION Total laparoscopic hysterectomy has been reported as having a higher incidence of vaginal cuff dehiscence compared with the abdominal and/or vaginal hysterectomy. The cause of vaginal cuff dehiscence after total laparoscopic hysterectomy is not specified, but possible causes may be the use of thermal energy for vaginal incision, reduced suturing width due to magnification, low quality of laparoscopic suturing skills and early resumption of regular activities after surgery. METHODS We performed 677 cases of total laparoscopic hysterectomy for benign diseases, such as fibroids or adenomyosis, from January 2007 to December 2008 in our institute. We experienced four cases (0.6%) of vaginal cuff dehiscence. We checked the operative parameters for these cases, such as whether the retroperitoneum was sutured or not and intrapelvic adhesion, as well as examined operative duration, blood loss, weight of removed organs, and body mass index. RESULTS Sexual intercourse was the triggering event for three cases (96 days, 103 days and 47 days after total laparoscopic hysterectomy) and the other case occurred during defecation (18 days and no sexual intercourse after total laparoscopic hysterectomy). There were no significant differences in vaginal cuff dehiscence with or without retroperitoneum suture and intrapelvic adhesion. CONCLUSION After these four cases of vaginal cuff dehiscence, we recognized the need to review these cases carefully in order to discover the cause and how to prevent this from occurring in other patients. We do not have the answers to prevent this complication at present, but reducing the power-source and attempting different suturing techniques may be important steps.
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Affiliation(s)
- T Hada
- Department of Obstetrics and Gynecology, Kurashiki Medical Center, Kurashiki, Okayama, Japan.
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Andou M, Hada T. Introduction of SILS into Gynecologic Oncology. J Minim Invasive Gynecol 2010. [DOI: 10.1016/j.jmig.2010.08.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hada T, Andou M. Vaginal Cuff Dehiscence after Total Laparoscopic Hysterectomy – An Examination of 677 Cases. J Minim Invasive Gynecol 2010. [DOI: 10.1016/j.jmig.2010.08.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kumamoto-Yonezawa Y, Sasaki R, Suzuki Y, Matsui Y, Hada T, Uryu K, Sugimura K, Yoshida H, Mizushina Y. Enhancement of human cancer cell radiosensitivity by conjugated eicosapentaenoic acid - a mammalian DNA polymerase inhibitor. Int J Oncol 2010; 36:577-84. [PMID: 20126977 DOI: 10.3892/ijo_00000532] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
We previously found that conjugated eicosapentaenoic acid (cEPA) selectively inhibited the activities of mammalian DNA polymerases (pols), and suppressed human cancer cell growth. The aim of the present study was to evaluate the efficacy of concurrent radiation with cEPA in a human colon carcinoma cell line, HCT 116. Furthermore, we examined the most effective timing of irradiation. The post-irradiation addition of cEPA significantly enhanced HCT116 cell radiosensitivity by decreasing the expression of pols beta, delta and epsilon, increasing damaged DNA, such as DNA double-strand breaks, inhibiting clonogenic survival, and inducing apoptosis. However, cells treated by pre-irradiation addition of cEPA did not influence radiosensitive survival and radiation-induced apoptosis. cEPA inhibited the activities of pols needed for DNA repair, thereby DNA damage must be augmented by cEPA and irradiation. These results suggested that the combination of inhibitors of DNA repair-related pols/radiation could be an effective anticancer therapy.
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Affiliation(s)
- Yuko Kumamoto-Yonezawa
- Laboratory of Food and Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Nishi-ku, Kobe, Hyogo 651-2180, Japan
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Shiota A, Hada T, Baba T, Sato M, Yamanaka-Okumura H, Yamamoto H, Taketani Y, Takeda E. Protective effects of glycoglycerolipids extracted from spinach on 5-fluorouracil induced intestinal mucosal injury. J Med Invest 2010; 57:314-20. [PMID: 20847532 DOI: 10.2152/jmi.57.314] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Glycoglycerolipids are mostly found in plants, however the beneficial effects of the glycoglycerolipids on mammalian body have not been understood. In this study, we investigated the effects of glycolipid extracts from spinach, which highly contained glycoglycerolipids, on mucosal injury induced by 5-fluorouracil (5-FU) in rats. Preadministration of glycolipid extracts from spinach (20 mg/kg body weight) prevented villous atrophy, misaligned crypts, and increased inflammatory cytokines in rat jejunum treated with 5-FU (300 mg/kg body weight) compared with the extracts from soybean. The glycolipid extracts from spinach highly contained monogalactosyl-diacylglycerol (MGDG) and diglactosyl-diacylglycerol (DGDG). In Caco-2 cells, MGDG and DGDG inhibited the production of reactive oxygen species induced by phorbol ester. We concluded that glycolipid extracts from spinach has anti-oxidative and anti-inflammatory effects, and the extract may be useful for prevention of drug-induced mucosal injury and other inflammatory diseases. Tokushima
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Affiliation(s)
- Asuka Shiota
- Department of Clinical Nutrition, Institute of Health Biosciences, the University of Tokushima Graduate School, Tokushima, Japan
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Hada T, Ohmura H, Mukai K, Eto D, Takahashi T, Hiraga A. Utilisation of the time constant calculated from heart rate recovery after exercise for evaluation of autonomic activity in horses. Equine Vet J 2010:141-5. [PMID: 17402409 DOI: 10.1111/j.2042-3306.2006.tb05530.x] [Citation(s) in RCA: 12] [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] [Indexed: 11/27/2022]
Abstract
REASONS FOR PERFORMING STUDY Heart rate (HR) recovery immediately after exercise is controlled by autonomic functions and the time constant (T) calculated from HR recovery is thought to be an index of parasympathetic activity in man. OBJECTIVES To investigate whether it is possible to evaluate autonomic function using the time constant in horses. METHODS Five Thoroughbred horses were subjected to a standard exercise test. Following pre-medication with saline, atropine and/or propranolol, the horses ran for 2.5 min at a speed of 8 m/sec at a 10% incline and T was calculated from HR after the exercise. Secondly, 7 Thoroughbred horses were then trained for 11 weeks and T and maximal oxygen uptake (VO2max) measured at intervals of 1 or 2 weeks. In 6 horses, T with atropine pre-medication was also measured before and after the whole training period. Furthermore, the HR variability at rest was evaluated by power spectral analysis at intervals of 3 or 4 weeks. RESULTS Time constant was increased by atropine and/or propranolol pre-medication, decreased with the progress of training and inversely correlated with VO2max during training (r = 0.43, P<0.005). Parasympathetic blockade significantly decreased T only after and not before, the training; however, T was lower in post training than in pretraining, irrespective of parasympathetic blockade. On the other hand, parasympathetic activity at rest was attenuated and sympathetic activity became predominant following the training. CONCLUSION Heart rate recovery is affected by sympathetic withdrawal and parasympathetic reactivation in horses and suggests that physical training hastened HR recovery by improving the parasympathetic function after exercise with aerobic capacity. However, the effects of other factors need to be considered because the training effect appeared on T even under parasympathetic blockade. The parasympathetic activity at rest is in contrast to that after exercise, suggesting that T does not reflect parasympathetic activity at rest. POTENTIAL RELEVANCE If demonstrated how HR recovery is controlled after exercise, its analysis will be important in the evaluation of physical fitness in horses.
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Affiliation(s)
- T Hada
- Equine Science Division, Hidaka Training and Research Center, Japan Racing Association, 535-13 Nischicha, Urakawa-cho, Uraakawagun, Hokkaido, Japan
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Andou M, Hada T, Ohta Y, Miki M, Takaki Y, Deura I, Kanao H. What Would You Do?: Laparoscopic Management of Urinary Tract Injuries during TLH. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.286] [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: 10/20/2022]
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Hada T, Andou M, Takaki Y, Kanao H, Miki M, Ota Y, Kobayashi E. Laparoscopic Management for the Large Ovarian Cyst – Retrieval Method by Using an Isolation Bag. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.504] [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: 10/20/2022]
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Andou M, Hada T, Ohta Y, Miki M, Takaki Y, Deura I, Kanao H. Total Laparoscopic Nerve Sparing Radical Hysterectomy – Focusing on Elucidating of Vascular and Nerve Systems. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.298] [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: 10/20/2022]
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Deura I, Miki M, Hada T, Ohta Y, Takaki Y, Kanao H, Andou M. Excisional Surgery for Deeply Infiltrating Endometriosis with Cul-de-Sac Obliteration. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.066] [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]
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Andou M, Takaki Y, Ohta Y, Miki M, Deura I, Kanao H, Hada T. Radical Resection and Reconstructive Techniques for Ureteral and Rectal Endometriosis. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.068] [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: 10/20/2022]
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Kawakami Y, Nakamura T, Hosokawa T, Suzuki-Yamamoto T, Yamashita H, Kimoto M, Tsuji H, Yoshida H, Hada T, Takahashi Y. Antiproliferative activity of guava leaf extract via inhibition of prostaglandin endoperoxide H synthase isoforms. Prostaglandins Leukot Essent Fatty Acids 2009; 80:239-45. [PMID: 19457650 DOI: 10.1016/j.plefa.2009.04.006] [Citation(s) in RCA: 21] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 04/03/2009] [Accepted: 04/23/2009] [Indexed: 11/20/2022]
Abstract
Prostaglandin endoperoxide H synthase (PGHS) is a key enzyme for the synthesis of prostaglandins (PGs) which play important roles in inflammation and carcinogenesis. Because the extract from Psidium guajava is known to have a variety of beneficial effects on our body including the anti-inflammatory, antioxidative and antiproliferative activities, we investigated whether the extract inhibited the catalytic activity of the two PGHS isoforms using linoleic acid as an alternative substrate. The guava leaf extract inhibited the cyclooxygenase reaction of recombinant human PGHS-1 and PGHS-2 as assessed by conversion of linoleic acid to 9- and 13-hydroxyoctadecadienoic acids (HODEs). The guava leaf extract also inhibited the PG hydroperoxidase activity of PGHS-1, which was not affected by nonsteroidal anti-inflammatory drugs (NSAIDs). Quercetin which was one of the major components not only inhibited the cyclooxygenase activity of both isoforms but also partially inhibited the PG hydroperoxidase activity. Overexpression of human PGHS-1 and PGHS-2 in the human colon carcinoma cells increased the DNA synthesis rate as compared with mock-transfected cells which did not express any isoforms. The guava leaf extract not only inhibited the PGE(2) synthesis but also suppressed the DNA synthesis rate in the PGHS-1- and PGHS-2-expressing cells to the same level as mock-transfected cells. These results demonstrate the antiproliferative activity of the guava leaf extract which is at least in part caused by inhibition of the catalytic activity of PGHS isoforms.
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Affiliation(s)
- Yuki Kawakami
- Department of Nutritional Science, Faculty of Health and Welfare Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan
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Kumamoto-Yonezawa Y, Sasaki R, Ota Y, Suzuki Y, Fukushima S, Hada T, Uryu K, Sugimura K, Yoshida H, Mizushina Y. Cell cycle arrest triggered by conjugated eicosapentaenoic acid occurs through several mechanisms including G1 checkpoint activation by induced RPA and ATR expression. Biochim Biophys Acta Gen Subj 2009; 1790:339-46. [DOI: 10.1016/j.bbagen.2009.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2008] [Revised: 02/02/2009] [Accepted: 02/02/2009] [Indexed: 01/03/2023]
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Maeda N, Kokai Y, Ohtani S, Hada T, Yoshida H, Mizushina Y. Inhibitory effects of preventive and curative orally administered spinach glycoglycerolipid fraction on the tumor growth of sarcoma and colon in mouse graft models. Food Chem 2009. [DOI: 10.1016/j.foodchem.2008.05.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Uebanso T, Arai H, Taketani Y, Fukaya M, Yamamoto H, Mizuno A, Uryu K, Hada T, Takeda E. Extracts of Momordica charantia suppress postprandial hyperglycemia in rats. J Nutr Sci Vitaminol (Tokyo) 2008; 53:482-8. [PMID: 18202535 DOI: 10.3177/jnsv.53.482] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Momordica charantia (bitter melon) is commonly known as vegetable insulin, but the mechanisms underlying its hypoglycemic effect remain unclear. To address this issue, the effects of bitter melon extracts on postprandial glycemic responses have been investigated in rats. An aqueous extract (AE), methanol fraction (MF) and methanol insoluble fraction (MIF) were prepared from bitter melon. An oral sucrose tolerance test revealed that administration of AE, MF or MIF each significantly suppressed plasma glucose levels at 30 min as compared with the control. In addition, the plasma insulin level at 30 min was also significantly lower after MF administration than in the control in the oral sucrose tolerance test. By contrast, these effects of bitter melon extracts were not observed in the oral glucose tolerance test. In terms of mechanism, bitter melon extracts dose-dependently inhibited the sucrase activity of intestinal mucosa with IC(50) values of 8.3, 3.7 and 12.0 mg/mL for AE, MF and MIF, respectively. The fraction with a molecular weight of less than 1,300 (LT 1,300) obtained from MF inhibited the sucrase activity most strongly in an uncompetitive manner with an IC(50) value of 2.6 mg/mL. Taken together, these results demonstrated that bitter melon suppressed postprandial hyperglycemia by inhibition of alpha-glucosidase activity and that the most beneficial component is present in the LT 1,300 fraction obtained from MF.
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Affiliation(s)
- Takashi Uebanso
- Department of Clinical Nutrition, University of Tokushima Graduate School, Tokushima, Japan
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Mizushina Y, Takeuchi T, Hada T, Maeda N, Sugawara F, Yoshida H, Fujita M. The inhibitory action of SQDG (sulfoquinovosyl diacylglycerol) from spinach on Cdt1-geminin interaction. Biochimie 2008; 90:947-56. [DOI: 10.1016/j.biochi.2008.02.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Accepted: 02/18/2008] [Indexed: 11/17/2022]
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Koga D, Chian ACL, Hada T, Rempel EL. Experimental evidence of phase coherence of magnetohydrodynamic turbulence in the solar wind: GEOTAIL satellite data. Philos Trans A Math Phys Eng Sci 2008; 366:447-57. [PMID: 17681910 DOI: 10.1098/rsta.2007.2102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Magnetohydrodynamic (MHD) turbulence is commonly observed in the solar wind. Nonlinear interactions among MHD waves are likely to produce finite correlation of the wave phases. For discussions of various transport processes of energetic particles, it is fundamentally important to determine whether the wave phases are randomly distributed (as assumed in the quasi-linear theory) or have a finite coherence. Using a method based on the surrogate data technique, we analysed the GEOTAIL magnetic field data to evaluate the phase coherence in MHD turbulence in the Earth's foreshock region. The results demonstrate the existence of finite phase correlation, indicating that nonlinear wave-wave interactions are in progress.
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Affiliation(s)
- D Koga
- National Institute for Space Research (INPE), PO Box 515, São José dos Campos, São Paulo 12227-010, Brazil.
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Furukawa T, Nishida M, Hada T, Kuramochi K, Sugawara F, Kobayashi S, Iijima H, Shimada H, Yoshida H, Mizushina Y. Inhibitory effect of sulfoquinovosyl diacylglycerol on prokaryotic DNA polymerase I activity and cell growth of Escherichia coli. J Oleo Sci 2007; 56:43-7. [PMID: 17693698 DOI: 10.5650/jos.56.43] [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: 11/13/2022] Open
Abstract
We isolated the glycolipids fraction from spinach (Spinacia oleracea L.) and found that the fraction inhibited the activities of prokaryotic DNA polymerase I from Escherichia coli (E. coli) and cell growth of E. coli. The fraction contained mainly three glycolipids, monogalactosyl diacylglycerol (MGDG), digalactosyl diacylglycerol (DGDG) and sulfoquinovosyl diacylglycerol (SQDG), and purified SQDG inhibited these activities, however, purified MGDG and DGDG had no influence. In the tested strains of E. coli, SQDG inhibited the cell proliferation of the JM109 strain. It could be considered that a SQDG-containing thylakoid membrane in plant chloroplasts might have anti-bacterial activity.
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Affiliation(s)
- Tomoyuki Furukawa
- Division of Plant Biotechnology, Tissue Engineering Research Center, Tokyo University of Science, Noda, Chiba, JAPAN
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Maeda N, Kokai Y, Ohtani S, Sahara H, Hada T, Ishimaru C, Kuriyama I, Yonezawa Y, Iijima H, Yoshida H, Sato N, Mizushina Y. Anti-Tumor Effects of the Glycolipids Fraction from Spinach which Inhibited DNA Polymerase Activity. Nutr Cancer 2007; 57:216-23. [PMID: 17571956 DOI: 10.1080/01635580701277908] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [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: 10/18/2022]
Abstract
We succeeded in purifying the fraction of monogalactosyl diacylglycerol (MGDG), digalactosyl diacylglycerol (DGDG), and sulfoquinovosyl diacylglycerol (SQDG) containing the major glycolipids from a green vegetable, spinach (Spinacia oleraceaL.). This glycolipids fraction inhibited the activities of replicative DNA polymerases (pols) such as alpha, delta, and epsilon, and mitochondrial pol gamma with IC50 values of 44.0-46.2 microg/ml, but had no influence on the activity of repair-related pol beta. The fraction also inhibited the proliferation of human cervix carcinoma (HeLa) cells with LD50 values of 57.2 microg/ml. In an in vivo anti-tumor assay on nude mice bearing solid tumors of HeLa cells, the fraction was shown to be a promising suppressor of solid tumors. Histopathological examination revealed that tumor necrosis with hemorrhage was significantly enhanced with the glycolipids fraction in vivo. The spinach glycolipids fraction might be a potent anti-tumor compound, and this fraction may be a healthy food substance with anti-tumor activity.
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Affiliation(s)
- Naoki Maeda
- Laboratory of Food & Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Nishi-ku, Kobe, Hyogo, Japan
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Yonezawa Y, Hada T, Uryu K, Tsuzuki T, Nakagawa K, Miyazawa T, Yoshida H, Mizushina Y. Mechanism of cell cycle arrest and apoptosis induction by conjugated eicosapentaenoic acid, which is a mammalian DNA polymerase and topoisomerase inhibitor. Int J Oncol 2007; 30:1197-204. [PMID: 17390022] [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: 05/14/2023] Open
Abstract
Conjugated eicosapentaenoic acid (cEPA) selectively inhibited the activities of mammalian DNA polymerases (pols) and human DNA topoisomerases (topos). cEPA inhibited the cell growth of two human leukemia cell lines, NALM-6, which is a p53-wild type, and HL-60, which is a p53-null mutant, with LD50 values of 37.5 and 12.5 microM, respectively. In both cell lines, cEPA arrested in the G1 phase, and increased cyclin E protein levels, indicating that it blocks the primary step of in vivo DNA replication by inhibiting the activity of replicative pols rather than topos. DNA replication-related proteins such as RPA70, ATR and phosphorylated-Chk1/2 were increased by cEPA treatment in the cell lines, suggesting that cEPA led to DNA replication fork stress inhibiting the activities of pols and topos, and the ATR-dependent DNA damage response pathway could respond to the inhibitor of DNA replication. The compound induced cell apoptosis through both p53-dependent and p53-independent pathways in cell lines NALM-6 and HL-60, respectively. These results suggested the therapeutic potential of cEPA as a leading anti-cancer compound that inhibited activities of pols and topos.
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Affiliation(s)
- Yuko Yonezawa
- Laboratory of Food & Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Kobe, Hyogo, Japan
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Yonezawa Y, Hada T, Uryu K, Tsuzuki T, Nakagawa K, Miyazawa T, Yoshida H, Mizushina Y. Mechanism of cell cycle arrest and apoptosis induction by conjugated eicosapentaenoic acid, which is a mammalian DNA polymerase and topoisomerase inhibitor. Int J Oncol 2007. [DOI: 10.3892/ijo.30.5.1197] [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: 11/06/2022] Open
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Maeda N, Hada T, Yoshida H, Mizushina Y. Inhibitory Effect on Replicative DNA Polymerases, Human Cancer Cell Proliferation, and In Vivo Anti-Tumor Activity by Glycolipids from Spinach. Curr Med Chem 2007; 14:955-67. [PMID: 17439396 DOI: 10.2174/092986707780362952] [Citation(s) in RCA: 25] [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: 11/22/2022]
Abstract
We succeeded in purifying a major glycolipids fraction (i.e., Fraction-II) in the class of monogalactosyl diacylglycerol (MGDG), digalactosyl diacylglycerol (DGDG) and sulfoquinovosyl diacylglycerol (SQDG) from spinach using hydrophobic column chromatography. Fraction-II inhibited the activities of replicative DNA polymerases (pols) such as alpha, delta and epsilon, and mitochondrial pol gamma with IC(50) values of 43-79 microg/ml, but had no influence on the activity of repair-related pols beta and lambda. MGDG, DGDG, SQDG were purified from Fraction-II of spinach using silica gel column chromatography, and SQDG was the strongest inhibitor of mammalian pols in the three glycolipids. Therefore, SQDG and its related compounds were chemically synthesized, and the sulfate group and fatty acid moiety of the compound were suggested to be important for pol inhibition. These glycolipids showed no effect even on the activities of plant pols, prokaryotic pols and other DNA metabolic enzymes such as T4 polynucleotide kinase, T7 RNA polymerase and deoxyribonuclease I. Fraction-II also inhibited the proliferation of human cervix carcinoma (HeLa) cells with LD(50) values of 57 microg/ml, and could halt the cell cycle at the G1-phase, and subsequently induced severe apoptosis. In an in vivo anti-tumor assay on nude mice bearing solid tumors of HeLa cells, Fraction-II was shown to be a promising suppressor of solid tumors. Histopathological examination revealed that tumor necrosis with hemorrhage was significantly enhanced with Fraction-II in vivo. The spinach Fraction-II containing SQDG might be a potent anti-tumor compound, and may be a healthy food substance with anti-tumor activity.
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Affiliation(s)
- Naoki Maeda
- Laboratory of Food and Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, 518 Arise, Ikawadanicho, Nishi-ku, Kobe, Hyogo 651-2180, Japan
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Abstract
Antithrombotic activities of odorless garlic powder were demonstrated in blood fibrinolytic and coagulation systems. Though the odorless garlic preparation did not influence tissue-type plasminogen activator (t-PA) or its inhibitor secretions from human umbilical vein endothelial cells, it enhanced plasmin generation by t-PA on fibrin film and in chromogenic assays by 1.8-fold and 8.7-fold respectively. The coagulation system was considerably reduced after the administration of the garlic in a rat in situ loop model, indicating that increased levels of thrombin-antithrombin III (TAT) complex in the control group were significantly reduced to normal (sham) in the garlic group (p<0.05), which was associated with decreasing tendencies towards prolonged or increased values of coagulation parameters in the control group. These findings suggest that odorless garlic not only activates fibrinolytic activity by accelerating t-PA-mediated plasminogen activation, but also suppresses the coagulation system by downregulating thrombin formation, suggesting a beneficial role in preventing pathological thrombus formation in such cardiovascular disorders.
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Affiliation(s)
- Hideharu Fukao
- Department of Nutritional Sciences, Faculty of Food Culture, Kurashiki Sakuyo University, Japan.
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Yonezawa Y, Hada T, Uryu K, Iijima H, Yoshida H, Mizushina Y. Inhibitory action of C22-fatty acids on DNA polymerases and DNA topoisomerases. Int J Mol Med 2006. [DOI: 10.3892/ijmm.18.4.583] [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: 11/06/2022] Open
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Yonezawa Y, Hada T, Uryu K, Iijima H, Yoshida H, Mizushina Y. Inhibitory action of C22-fatty acids on DNA polymerases and DNA topoisomerases. Int J Mol Med 2006; 18:583-8. [PMID: 16964408] [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: 05/11/2023] Open
Abstract
We reported previously that unsaturated linear-chain fatty acids of the cis-configuration with a C18-hydrocarbon chain such as linoleic acid (cis-9, 12-octadecadienoic acid, C18:2) could potently inhibit the activity of mammalian DNA polymerases (Biochim Biophys Acta 1308: 256-262, 1996). In this study, we investigated the inhibitory effects of cis-type C22-fatty acids including cis-7,10,13,16,19-docosapentaenoic acid (DPA, C22:5) and cis-4,7,10,13,16,19-docosahexaenoic acid (DHA, C22:6) on mammalian DNA polymerases and human DNA topoisomerases. Cis-13,16-docosadienoic acid (C22:2) was the strongest inhibitor of both DNA polymerases and topoisomerases of all C22-fatty acids tested. The inhibitory tendency by the fatty acids on DNA polymerases was the same as that of DNA topoisomerases, and the second strongest inhibitor was cis-13,16,19-docosatrienoic acid (C22:3). The energy-minimized three-dimensional structures of the fatty acids were calculated and it was found that a length of 19-21 Angstrom and width of more than 7 Angstrom in C22-fatty acid structure were important for enzyme inhibition. The three-dimensional structure of the active site of both DNA polymerases and topoisomerases must have a pocket to join C22:2, and this pocket was 19.41 Angstrom long and 9.58 Angstrom wide.
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Affiliation(s)
- Yuko Yonezawa
- Laboratory of Food and Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Hyogo 651-2180, Japan
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Iijima H, Musumi K, Hada T, Maeda N, Yonezawa Y, Yoshida H, Mizushina Y. Inhibitory effect of monogalactosyldiacylglycerol, extracted from spinach using supercritical CO2, on mammalian DNA polymerase activity. J Agric Food Chem 2006; 54:1627-32. [PMID: 16506811 DOI: 10.1021/jf051950c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We investigated the effective extraction of monogalactosyldiacylglycerol (MGDG) from dried spinach (Spinacia oleracea) using supercritical fluid carbon dioxide (SC-CO(2)) with a modifier/entrainer. The yield of MGDG in the SC-CO(2) extract was not influenced by increasing temperature at a constant pressure, although the total extract yield was decreased. The total extract yield and MGDG yield in the extract from commercially purchased spinach (unknown subspecies), were greatly influenced by lower pressure. In a modifier (i.e., ethanol) concentration range of 2.5-20%, both the extract and MGDG yield increased as the ethanol concentration rose. The highest total extract yield (69.5 mg/g of spinach) and a good MGDG yield (16.3 mg/g of spinach) were obtained at 80 degrees C, 25 MPa, and 20% ethanol. The highest MGDG concentration (76.0% in the extract) was obtained at 80 degrees C, 25 MPa, and 2.5% ethanol, although the total extract yield under these conditions was low (5.2 mg/g of spinach). The optimal conditions for the extraction of MGDG were 80 degrees C, 20 MPa, and 10% ethanol. Of the 11 subspecies of spinach tested under these conditions, "Ujyou" had the highest concentration of MGDG. The total extract yield and MGDG concentration of Ujyou were 20.4 mg of the extract/g of spinach and 70.5%, respectively. The concentration of MGDG was higher in the SC-CO(2) extract than in the extract obtained using solvents such as methanol and n-hexane. The extract of Ujyou, which was the optimal subspecies for the extraction of MGDG, inhibited the activity of calf DNA polymerase alpha with IC(50) values of 145 microg/mL but was not effective against DNA polymerase beta.
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Affiliation(s)
- Hiroshi Iijima
- Laboratory of Food and Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Nishi-ku, Kobe, Hyogo 651-2180, Japan
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Kuriyama I, Musumi K, Yonezawa Y, Takemura M, Maeda N, Iijima H, Hada T, Yoshida H, Mizushina Y. Inhibitory effects of glycolipids fraction from spinach on mammalian DNA polymerase activity and human cancer cell proliferation. J Nutr Biochem 2005; 16:594-601. [PMID: 16081275 DOI: 10.1016/j.jnutbio.2005.02.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [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: 01/29/2005] [Revised: 02/21/2005] [Accepted: 02/22/2005] [Indexed: 11/30/2022]
Abstract
We succeeded in purifying the fraction containing the major glycolipids in monogalactosyl diacylglycerol, digalactosyl diacylglycerol and sulfoquinovosyl diacylglycerol (SQDG) from dried vegetables. This glycolipids fraction was an inhibitor of DNA polymerase alpha (pol alpha) in vitro and also the proliferation of human cancer cells. In this study, eight common vegetables were investigated in terms of the glycolipids fraction, the amounts of major glycolipids, mammalian DNA polymerase inhibitory activity and antiproliferative activity toward human cancer cells. Green tea possessed the largest amount of glycolipids overall. Spinach contained the largest amount of SQDG, followed by parsley, green onion, chive, sweet pepper, green tea, carrot and garlic. Spinach had the strongest inhibitory effect on pol alpha activity and human cancer cell proliferation. A significant correlation was found between SQDG content and inhibition of DNA polymerase. Therefore, the inhibition of pol alpha activity by SQDG may lead to cell growth suppression. Of the six subspecies of spinach (Spinacia oleracea) tested, "Anna" had the largest amount of SQDG, strongest inhibitory activity toward DNA polymerase and greatest effect on human cancer cell proliferation. Based on these results, the glycolipids fraction from spinach is potentially a source of food material for a novel anticancer activity.
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Affiliation(s)
- Isoko Kuriyama
- Department of Nutritional Science, Laboratory of Food and Nutritional Sciences, Kobe-Gakuin University, Kobe, Hyogo 651-2180, Japan
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Yonezawa Y, Hada T, Uryu K, Tsuzuki T, Eitsuka T, Miyazawa T, Murakami-Nakai C, Yoshida H, Mizushina Y. Inhibitory effect of conjugated eicosapentaenoic acid on mammalian DNA polymerase and topoisomerase activities and human cancer cell proliferation. Biochem Pharmacol 2005; 70:453-60. [PMID: 15963470 DOI: 10.1016/j.bcp.2005.05.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2005] [Revised: 05/10/2005] [Accepted: 05/10/2005] [Indexed: 10/25/2022]
Abstract
Conjugated eicosapentaenoic acid (cEPA) selectively inhibited the activities of mammalian DNA polymerases (pols) and human DNA topoisomerases (topos) [Yonezawa Y, Tsuzuki T, Eitsuka T, Miyazawa T, Hada T, Uryu K, et al. Inhibitory effect of conjugated eicosapentaenoic acid on human DNA topoisomerases I and II. Arch Biochem Biophys 2005;435:197-206]. In this report, we investigated the inhibitory effect of cEPA on a human promyelocytic leukemia cell line, HL-60, to determine which enzymes influence cell proliferation. cEPA inhibited the proliferation of HL-60 cells (LD(50)=20.0 microM), and the inhibitory effect was stronger than that of non-conjugated EPA. cEPA arrested the cells at G1/S-phase, increased cyclin A and E protein levels, and prevented the incorporation of thymidine into the cells, indicating that it blocks the primary step of in vivo DNA replication by inhibiting the activity of replicative pols rather than topos. This compound also induced apoptosis of the cells. These results suggested the therapeutic potential of cEPA as a leading anti-cancer compound that poisons pols.
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Affiliation(s)
- Yuko Yonezawa
- Laboratory of Food & Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Nishi-ku, Kobe, Hyogo 651-2180, Japan
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Maeda N, Hada T, Murakami-Nakai C, Kuriyama I, Ichikawa H, Fukumori Y, Hiratsuka J, Yoshida H, Sakaguchi K, Mizushina Y. Effects of DNA polymerase inhibitory and antitumor activities of lipase-hydrolyzed glycolipid fractions from spinach. J Nutr Biochem 2005; 16:121-8. [PMID: 15681172 DOI: 10.1016/j.jnutbio.2004.08.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2004] [Accepted: 08/09/2004] [Indexed: 11/28/2022]
Abstract
We succeeded in purifying the major glycolipid fraction in the class of sulfoquinovosyl diacylglycerol, monogalactosyl diacylglycerol and digalactosyl diacylglycerol (DGDG) from a green vegetable, spinach (Spinacia oleracea L.). This glycolipid fraction was an inhibitor of DNA polymerases and a growth inhibitor of NUGC-3 human gastric cancer cells, and, interestingly, the activities were much stronger when the fraction was hydrolyzed by lipase. Glycolipids in the hydrolyzed fraction consisted of sulfoquinovosyl monoacylglycerol (SQMG), monogalactosyl monoacylglycerol (MGMG) and DGDG. In the in vivo antitumor assay using Greene's melanoma, the fraction containing SQMG, MGMG and DGDG showed to be a promising suppressor of solid tumors. Spinach glycolipid fraction might be a potent antitumor compound if directly injected into a tumor-carrying body, and this fraction may be a healthy food material that has antitumor activity.
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Affiliation(s)
- Naoki Maeda
- Laboratory of Food & Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Nishi-ku, Kobe, Hyogo 651-2180, Japan
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Matsubara K, Matsumoto H, Mizushina Y, Mori M, Nakajima N, Fuchigami M, Yoshida H, Hada T. Inhibitory effect of glycolipids from spinach on in vitro and ex vivo angiogenesis. Oncol Rep 2005; 14:157-60. [PMID: 15944783] [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: 05/02/2023] Open
Abstract
Anti-cancer activity of some glycolipids from animals and plants has been demonstrated, although it was unknown whether the glycolipids had anti-angiogenic activity. The effects of the purified three glycolipids, monogalactosyl diacylglycerol (MGDG), digalactosyl diacylglycerol (DGDG), and sulfoquinovosyl diacylglycerol (SQDG) from the green vegetable spinach (Spinacia oleracea L.) were examined on in vitro and ex vivo angiogenesis models. MGDG and SQDG suppressed microvessel growth in an ex vivo angiogenesis model using a rat aortic ring. The glycolipids inhibited human umbilical vein endothelial cell (HVUEC) tube formation on a reconstituted basement membrane and HUVEC proliferation. These results demonstrate that glycolipids from spinach would suppress tumor growth by suppressing angiogenesis and might be candidates for anti-cancer or anti-angiogenic materials.
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Affiliation(s)
- Kiminori Matsubara
- Department of Nutritional Science, Faculty of Health and Welfare Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan.
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48
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Sawada K, Masaki N, Hayashi S, Zeniya M, Ishikawa T, Takahashi H, Ohnishi K, Fukunaga K, Hara N, Yamamoto T, Hada T, Toda G. Immunomodulatory effects of selective leucocytapheresis as a new adjunct to interferon-alpha2b plus ribavirin combination therapy: a prospective study in patients with high plasma HCV viraemia. J Viral Hepat 2005; 12:274-82. [PMID: 15850468 DOI: 10.1111/j.1365-2893.2005.00577.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Efficacy of interferon-alpha2b (IFN) + ribavirin (IFN/RBV) combination in patients with high plasma hepatitis C virus (HCV) is very poor. Dysregulated CD4+ /CD8+ T cells is involved in both impaired cell-mediated immunity and resistance to IFN. Adsorptive granulocytes and monocytes apheresis (GMA) can remove infected leucocytes which are extrahepatic HCV reservoirs and also has been associated with intriguing immunomodulation and increases in CD4+ T cells. Our aim was to see if GMA enhances the efficacy of IFN/RBV. Twenty-four patients, 13 IFN resistant and 11 IFN naive were enrolled. Seventeen were genotype 1b and 7 were 2a or 2b. Mean plasma HCV-RNA was 612.9 (100-850) kIU/mL and alanine aminotransferase, 108 (41-373) U/L. GMA was performed with Adacolumn at one session/day for five consecutive days and IFN/RBV was started within 24 h after the last GMA session. Daily 6 million units of IFN, six times/week for 2 weeks and then three times/week for 22 weeks were given with RBV (600-800 mg/day/patient). Patients were followed for 6 months. GMA was associated with a significant increase in lymphocyte counts, complement activation fragment C3a and falls in tissue necrosis factor-alpha, and IL-8 produced by peripheral blood leucocytes. At week 24, 20 of 24 patients (83%) were HCV negative and by end of follow-up (week 49), the remission was sustained in 14 of 24 patients (58%) including 100% of patients with 2a or 2b. In conclusion, enhanced efficacy of IFN/RBV following GMA might be attributed to a more efficient immune function and a renewed IFN signaling towards HCV.
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Affiliation(s)
- K Sawada
- Department of Gastroentrology, Fujimoto Hospital Medicine, Osaka 583-0857, Japan.
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49
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Yonezawa Y, Tsuzuki T, Eitsuka T, Miyazawa T, Hada T, Uryu K, Murakami-Nakai C, Ikawa H, Kuriyama I, Takemura M, Oshige M, Yoshida H, Sakaguchi K, Mizushina Y. Inhibitory effect of conjugated eicosapentaenoic acid on human DNA topoisomerases I and II. Arch Biochem Biophys 2005; 435:197-206. [PMID: 15680922 DOI: 10.1016/j.abb.2004.12.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2004] [Revised: 12/08/2004] [Indexed: 11/30/2022]
Abstract
DNA topoisomerases (topos) and DNA polymerases (pols) are involved in many aspects of DNA metabolism such as replication reactions. We reported previously that long chain unsaturated fatty acids such as polyunsaturated fatty acids (PUFA) (i.e., eicosapentaenoic acid (EPA) and docosahexanoic acid (DHA)) inhibited the activities of eukaryotic pols in vitro. In the present study, we found that PUFA also inhibited human topos I and II activities, and the inhibitory effect of conjugated fatty acids converted from EPA and DHA (cEPA and cDHA) on pols and topos was stronger than that of normal EPA and DHA. cEPA and cDHA inhibited the activities of mammalian pols and human topos, but did not affect the activities of plant and prokaryotic pols or other DNA metabolic enzymes tested. cEPA was a stronger inhibitor than cDHA with IC(50) values for mammalian pols and human topos of 11.0-31.8 and 0.5-2.5 microM, respectively. Therefore, the inhibitory effect of cEPA on topos was stronger than that on pols. Preincubation analysis suggested that cEPA directly bound both topos I and II, but did not bind or interact with substrate DNA. This is the first report that conjugated PUFA such as cEPA act as inhibitors of pols and topos. The results support the therapeutic potential of cEPA as a leading anti-cancer compound that poisons pols and topos.
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Affiliation(s)
- Yuko Yonezawa
- Laboratory of Food and Nutritional Sciences, Department of Nutritional Science, Kobe-Gakuin University, Nishi-ku, Kobe, Hyogo 651-2180, Japan
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50
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Moree WJ, Kataoka KI, Ramirez-Weinhouse MM, Shiota T, Imai M, Sudo M, Tsutsumi T, Endo N, Muroga Y, Hada T, Tanaka H, Morita T, Greene J, Barnum D, Saunders J, Kato Y, Myers PL, Tarby CM. Small molecule antagonists of the CCR2b receptor. Part 2: Discovery process and initial structure–activity relationships of diamine derivatives. Bioorg Med Chem Lett 2004; 14:5413-6. [PMID: 15454236 DOI: 10.1016/j.bmcl.2004.08.009] [Citation(s) in RCA: 28] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2003] [Accepted: 08/05/2004] [Indexed: 10/26/2022]
Abstract
Structure-activity relationships (SAR) of a weakly active class of CCR2b inhibitors were utilized to initiate a lead evolution program employing the Drug Discovery Engine. Several alternative structural series have been discovered that display nanomolar activity in the CCR2b binding and CCR2b-mediated chemotaxis assays.
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Affiliation(s)
- Wilna J Moree
- Deltagen Research Laboratories, 4570 Executive Drive, Suite 400, San Diego, CA 92121, USA.
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