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Maruyama M, Miida S, Sato T, Kimura T, Watanabe A, Watanabe H, Nishizawa M, Horikawa K, Kajiwara T, Karasawa Y, Hasebe Y, Nozawa K, Terai S. Effectiveness and safety of lubiprostone after switching from stimulant laxatives in elderly patients with chronic constipation. JGH Open 2023; 7:610-617. [PMID: 37744709 PMCID: PMC10517445 DOI: 10.1002/jgh3.12956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/26/2023] [Accepted: 07/28/2023] [Indexed: 09/26/2023]
Abstract
Background and Aim Stimulant laxatives may cause electrolyte abnormalities, dehydration, and abdominal pain; their long-term use can lead to tolerance and subsequent refractory constipation. We investigated the effectiveness, safety, and quality of life after switching from stimulant laxatives to lubiprostone in elderly patients with chronic constipation (CC). Methods This multicenter, interventional, open-label, single-arm, before-and-after comparison study enrolled 99 Japanese patients aged 65-90 years with CC who took stimulant laxatives for ≥2 weeks prior to switching to lubiprostone monotherapy. Results The mean ± SD spontaneous defecations at Week 1 of 7.8 ± 6.2 times/week was not significantly different from that at baseline (8.3 ± 4.7). Spontaneous defecations were significantly reduced at Weeks 2 (-1.5 ± 4.0, P < 0.001) and 4 (-1.5 ± 3.7, P < 0.001). The Bristol Stool Form Scale score did not change from baseline (4.7 ± 0.9) at Weeks 1 (4.5 ± 1.3) or 4 (4.3 ± 1.3), but it did at Week 2 (4.3 ± 1.5, P < 0.05). The Patient Assessment of Constipation Quality of Life questionnaire score increased (0.36 ± 0.07, P < 0.001) after 28 days. Nausea was the only symptom that worsened from baseline and was the most frequently reported adverse drug reaction (15.2%). Conclusion Switching to lubiprostone monotherapy for CC was not associated with significant concerns in short-term spontaneous defecation frequency and safety, but it might affect the efficacy and patient quality of life over 2 weeks. Careful treatment strategies facilitating gradual switching to lubiprostone monotherapy may be needed in patients using stimulant laxatives.
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Affiliation(s)
- Masaki Maruyama
- Department of Internal MedicineKashiwazaki General Hospital and Medical CenterKashiwazakiNiigataJapan
| | - Suguru Miida
- Department of Internal MedicineKashiwazaki General Hospital and Medical CenterKashiwazakiNiigataJapan
| | | | | | - Azuma Watanabe
- Department of GastroenterologyKameda Daiichi HospitalNiigataJapan
| | - Hideo Watanabe
- Department of SurgeryWatanabe HospitalMatsuyamaEhimeJapan
| | - Masafumi Nishizawa
- Department of Internal MedicineMinamisanriku HospitalMotoyoshi‐gunMiyagiJapan
| | - Kyohei Horikawa
- Wakamatsuen Health Care Facility for the ElderlyOkinawaJapan
| | | | - Yusuke Karasawa
- Medical Affairs, Viatris Pharmaceuticals Japan Inc.TokyoJapan
| | - Yuko Hasebe
- Medical Affairs, Viatris Pharmaceuticals Japan Inc.TokyoJapan
| | - Kazutaka Nozawa
- Medical Affairs, Viatris Pharmaceuticals Japan Inc.TokyoJapan
| | - Shuji Terai
- Division of Gastroenterology & Hepatology, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataJapan
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Taniguchi H, Kuboki Y, Watanabe J, Terazawa T, Kawakami H, Yokota M, Nakamura M, Kotaka M, Sugimoto N, Ojima H, Oki E, Kajiwara T, Moriwaki T, Takayama T, Denda T, Tamura T, Sunakawa Y, Ishihara S, Nakajima T, Morita S, Shirao K, Yoshino T. SO-19 Biomarker analysis using plasma angiogenesis factors in the TRUSTY study: A randomized phase 2/3 study of trifluridine/tipiracil plus bevacizumab as second-line treatment for metastatic colorectal cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.418] [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: 11/01/2022] Open
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Takahashi N, Izawa N, Nishio K, Masuishi T, Shoji H, Yamamoto Y, Matsumoto T, Sugiyama K, Kajiwara T, Kawakami K, Aomatsu N, Kawakami H, Esaki T, Narita Y, Hara H, Horie Y, Boku N, Miura K, Moriwaki T, Shimokawa M, Nakajima T, Muro K. O-6 Gene alterations in ctDNA related to the resistance mechanism of anti-EGFR antibodies and clinical efficacy outcomes of anti-EGFR antibody rechallenge plus trifluridine/tipiracil in metastatic colorectal cancer patients in WJOG8916G trial. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.010] [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] Open
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4
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Masuishi T, Izawa N, Takahashi N, Shoji H, Yamamoto Y, Matsumoto T, Sugiyama K, Kajiwara T, Kawakami K, Aomatsu N, Kondoh C, Kawakami H, Takegawa N, Esaki T, Narita Y, Hara H, Sunakawa Y, Boku N, Moriwaki T, Shimokawa M, Nakajima T, Muro K. SO-19 A multicenter phase Ⅱ trial of trifluridine/tipiracil in combination with cetuximab in RAS wild-type metastatic colorectal cancer patients refractory to prior anti-EGFR antibody therapy: The WJOG8916G trial. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.043] [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] Open
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Watanabe K, Kohyama A, Suzuki H, Kajiwara T, Karasawa H, Ohnuma S, Musha H, Kamei T, Naitoh T, Unno M. Clinical features of anorectal cancer in patients with Crohn’s disease: Japanese single center study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz421.024] [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: 11/13/2022] Open
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Watanabe S, Matsumoto N, Koshio J, Ishida A, Tanaka T, Abe T, Ishikawa D, Shoji S, Nozaki K, Ichikawa K, Kondo R, Otsubo A, Aoki A, Kajiwara T, Koyama K, Miura S, Yoshizawa H, Kikuchi T. MA21.05 Phase II Trial of the Combination of Alectinib with Bevacizumab in ALK-Positive Nonsquamous Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.676] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kadowaki S, Izawa N, Minashi K, Nishina T, Yamanaka T, Muro K, Sunakawa Y, Hironaka S, Kajiwara T, Kawakami Y, Nakajima T. Multicenter phase I/II study of nivolumab combined with paclitaxel plus ramucirumab as the second-line treatment in patients with advanced gastric cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sekiyama K, Yamada S, Nakagawa T, Nakayama Y, Kajiwara T. Partially Filled Flow Simulation Using Meshfree Method for High Viscosity Fluid in Plastic Mixer. INT POLYM PROC 2019. [DOI: 10.3139/217.3727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
A novel simulation technique for the flow in plastic mixers based on Element-free Galerkin Method (EFGM) has been developed in this study. To improve the simulation accuracy, a “rearrangement” scheme has been employed which eliminates errors caused by the irregular distribution of data points. Through several numerical tests, the new simulation technique has been validated to be applicable to high viscosity fluid flow with enough accuracy. Furthermore, simulation examples for realistic mixers were carried out using the developed technique. From the results, it was found that the developed technique is capable to investigate the relationship between flow behavior inside realistic mixers and operating conditions.
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Affiliation(s)
- K. Sekiyama
- Mechanical Engineering Research Laboratory , Kobe Steel, Ltd., Hyogo , Japan
- Department of Chemical Engineering , Faculty of Engineering, Kyushu University, Fukuoka , Japan
| | - S. Yamada
- Mechanical Engineering Research Laboratory , Kobe Steel, Ltd., Hyogo , Japan
| | - T. Nakagawa
- Mechanical Engineering Research Laboratory , Kobe Steel, Ltd., Hyogo , Japan
| | - Y. Nakayama
- Department of Chemical Engineering , Faculty of Engineering, Kyushu University, Fukuoka , Japan
| | - T. Kajiwara
- Department of Chemical Engineering , Faculty of Engineering, Kyushu University, Fukuoka , Japan
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Kato K, Kojima T, Saeki H, Hara H, Kajiwara T, Hironaka S, Nakatsumi H, Kadowaki S, Kagawa Y, Esaki T, Moriwaki T, Kobayashi T, Izawa N, Nomura S, Kuwata T, Fujii S, Okamoto W, Shitara K, Ohtsu A, Yoshino T. The nationwide cancer genome screening project in Japan, SCRUM-Japan GI-SCREEN: Efficient identification of cancer genome alterations in advanced esophageal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy282.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tanimoto S, Yayama S, Suto S, Matoba K, Kajiwara T, Inoue M, Endo Y, Yamakawa M, Makimoto K. Self-harm and Suicide Attempts in a Japanese Psychiatric Hospital. East Asian Arch Psychiatry 2018; 28:23-27. [PMID: 29576553] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE Self-harm and attempted suicide are risk factors for suicide in psychiatric hospital in-patients. This study aimed to analyse the circumstances of self-harm and suicide attempts in a Japanese psychiatric hospital so as to improve management and care. METHODS Incident reports of self-harm and suicide attempts during a 12.4-year period from November 2000 to March 2013 were reviewed. A descriptive analysis was conducted in terms of age, sex, and diagnosis of patients, as well as level, ward, situations, and causes of incidents. RESULTS During the study period, 90 cases of self-harm and attempted suicide involving 58 patients were reported. The rate of self-harm and suicide attempts was 0.05 per 1000 patient-days. The types of selfharm and suicide attempts included hanging (n = 25), wrist cutting (n = 19), ingestion of foreign objects (n = 17), and others (n = 29). The single case of completed suicide involved hanging, in a patient with schizophrenia. Among 55 patients with relevant data, the most common clinical diagnosis was mood disorder (41.8%), followed by schizophrenia (36.4%). Mood disorder was 3.5 times as prevalent in females as in males (14 vs. 4). Fourteen patients with mood disorder (n = 8) or schizophrenia (n = 6) were repeatedly involved in 46 of 89 cases of self-harm or attempted suicide; 11 were female. One woman with mood disorder attempted suicide 9 times within the same year. The top 3 management and care factors related to self-harm and suicide attempts were failure to adhere to preventive procedures (28%), insufficient therapeutic communication (28%), and difficulty in predicting suicide (20%). CONCLUSION Self-harm and suicide attempts at this psychiatric hospital occurred at a rate of 0.05 per 1000 patient-days between late 2000 and early 2013. Efforts are needed to increase compliance with suicide prevention procedures and therapeutic communication, so as to improve management and care of psychiatric in-patients and prevent them from committing suicide.
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Affiliation(s)
- S Tanimoto
- Department of Nursing, Ishikawa Prefectural Nursing University, Ishikawa, Japan
| | - S Yayama
- Department of Nursing, Kyoto Gakuen University, Kyoto, Japan
| | - S Suto
- Department of Community Medicine, Nara Medical University, Nara, Japan
| | - K Matoba
- Department of Nursing, Osaka Aoyama University, Osaka, Japan
| | - T Kajiwara
- Department of Nursing, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - M Inoue
- School of Human Services and Social Work, Griffith University, Queensland, Australia
| | - Y Endo
- Department of Nursing, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - M Yamakawa
- Department of Nursing, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - K Makimoto
- School of Nursing of Rehabilitation, Konan Women's University, Hyogo, Japan
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Ishihara K, Mizumoto H, Nakazawa K, Kajiwara T, Funatsu K. Formation of a Sheet-Shaped Organoid Using Rat Primary Hepatocytes for Long-Term Maintenance of Liver-Specific Functions. Int J Artif Organs 2018; 29:318-28. [PMID: 16685676 DOI: 10.1177/039139880602900310] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In recent years, use of hepatocyte aggregates has led to development of a hybrid artificial liver support system (HALSS) that has high performance. However, in general, their thickness is 100 μm or more, and generation of a dead cell layer due to oxygen exhaustion inside the aggregates has been a universal problem. The present study proposes a novel organoid culture method with better performance than previous organoid culture methods by forming a sheet-shaped organoid (organoid-sheet) with a thickness of approximately 100 μm. The cell number of the organoid-sheet was maintained at approximately 75% of the initial number at 4 days of culture. On the other hand, that of a cylindrical organoid (cylindroid), which formed inside of a plasma separation hollow fiber with 285 μm inner diameter in our previous study, decreased to approximately 50% within 2 days. The ammonia removal rate of the cells in the organoid-sheet was higher than that of the cells in the cylindroid on the first day, but it decreased during the culture time. At day 15, the rate was reduced by almost 50% with respect to the value on the first day. The cells in the cylindroid displayed a lower ammonia removal rate. A significant difference was not observed between the albumin synthesis rates of the two cultures on the first day. However, over a period of time the cells in the organoid-sheet showed a higher albumin synthesis rate than cells in the cylindroid. As this novel organoid maintains these functions for at least 1 month, it is expected to be applied for the development of a HALSS with higher performance.
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Affiliation(s)
- K Ishihara
- Department of Chemical Systems and Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan
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Okamoto W, Muro K, Taniguchi H, Akagi K, Hara H, Nishina T, Kajiwara T, Denda T, Hironaka S, Kudo T, Satoh T, Yoshino T. A clinical validation study of RASKET-B: A multiple detection kit for RAS and BRAF gene mutations in colorectal cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx659.045] [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: 11/12/2022] Open
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Takayoshi K, Okamoto W, Hironaka S, Honma Y, Ebi H, Nakanishi R, Kajiwara T, Kudo T, Tamura T, Komatsu Y, Hara H, Naruge D, Moriwaki T, Miki I, Sudo T, Nomura S, Fujii S, Shitara K, Ohtsu A, Yoshino T. The nationwide cancer genome screening project in Japan SCRUM-Japan GI-SCREEN: Efficient identification of cancer genome alterations in advanced small intestine cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx369.147] [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: 11/14/2022] Open
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Yuki S, Kato T, Taniguchi H, Hamaguchi T, Akagi K, Denda T, Mizukami T, Oki E, Yamada T, Shiozawa M, Kudo T, Tamura T, Esaki T, Naruge D, Kajiwara T, Nomura S, Fujii S, Shitara K, Ohtsu A, Yoshino T. The nationwide cancer genome screening project in Japan, SCRUM-Japan GI-SCREEN: Efficient identification of cancer genome alterations in advanced colorectal cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yamazaki K, Kuboki Y, Shinozaki E, Hara H, Komatsu Y, Nishina T, Yamaguchi K, Yuki S, Bando H, Asayama M, Tsushima T, Hamauchi S, Nakatsumi H, Kajiwara T, Wakabayashi M, Nomura S, Sato A, Doi T, Ohtsu A, Yoshino T. A Multicentre Phase I/II Study of TAS-102 with nintedanib in patients with metastatic colorectal cancer refractory to standard therapies (N-task force: EPOC1410). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fukuda J, Okamura K, Ishihara K, Mizumoto H, Nakazawa K, Ijima H, Kajiwara T, Funatsu K. Differentiation Effects by the Combination of Spheroid Formation and Sodium Butyrate Treatment in Human Hepatoblastoma Cell Line (Hep G2): A Possible Cell Source for Hybrid Artificial Liver. Cell Transplant 2017; 14:819-27. [PMID: 16454356 DOI: 10.3727/000000005783982503] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The aim of this study was to investigate the feasibility of human hepatoblastoma cell line (Hep G2), which differentiates by spheroid formation, and treatment with sodium butyrate (SB) as a cell source for hybrid artificial liver (HAL). Hep G2 spontaneously formed spheroids in polyurethane foam (PUF) within 3 days of culture and restored weak ammonia removal activity. Treatment with SB, which is a histone deacetylase inhibitor, further increased the ammonia removal activity of Hep G2 spheroids in a concentration-dependent manner. The activation of ornithine transcarbamylase—a urea cycle enzyme—was significantly related to the upregulation of ammonia removal by spheroid formation, but scarcely contributed to the further upregulation following SB treatment. In contrast with ammonia removal, treatment with SB reduced the albumin secretion of Hep G2 spheroids in a concentration-dependent manner. In the PUF-HAL module in a circulation culture, the ammonia removal rate and albumin secretion rate (per unit volume of the module) of Hep G2 spheroids treated with 5 mM SB were almost the same as those of primary porcine hepatocyte spheroids. These results suggest that simultaneous use of spheroid formation and SB treatment in Hep G2 is beneficial in enhancing the functions of human hepatocytes with potential applications in regenerative medicine and drug screening.
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Affiliation(s)
- J Fukuda
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan
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Nishina T, Kuboki Y, Shinozaki E, Fukuoka S, Kajiwara T, Shitara K, Yamaguchi K, Komatsu Y, Yuki S, Yamazaki K, Hara H, Mochizuki N, Fukutani M, Hasegawa H, Matsuda S, Wakabayashi M, Nomura S, Sato A, Ohtsu A, Yoshino T. A multicentre phase I/II study of TAS-102 with nintedanib in patients with metastatic colorectal cancer refractory to standard therapies (N-TASK FORCE: EPOC1410); Phase I results. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw370.21] [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] Open
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Yoshino T, Kuboki Y, Nishina T, Shinozaki E, Yamazaki K, Shitara K, Okamoto W, Kajiwara T, Matsumoto T, Tsushima T, Mochizuki N, Fukutani M, Nakamoto M, Hasegawa H, Sugama A, Nomura S, Sato A, Ohtsu A. PD-013 Final survival results of a multicenter phase I/II study of TAS-102 with bevacizumab for metastatic colorectal cancer patients refractory to standard therapies (C-TASK FORCE). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw200.13] [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: 11/12/2022] Open
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Kajiwara T, Midorikawa Y, Yamazaki S, Higaki T, Nakayama H, Moriguchi M, Tsuji S, Takayama T. Clinical score to predict the risk of bile leakage after liver resection. BMC Surg 2016; 16:30. [PMID: 27154038 PMCID: PMC4859985 DOI: 10.1186/s12893-016-0147-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Accepted: 04/30/2016] [Indexed: 12/12/2022] Open
Abstract
Background In liver resection, bile leakage remains the most common cause of operative morbidity. In order to predict the risk of this complication on the basis of various factors, we developed a clinical score system to predict the potential risk of bile leakage after liver resection. Methods We analyzed the postoperative course in 518 patients who underwent liver resection for malignancy to identify independent predictors of bile leakage, which was defined as “a drain fluid bilirubin concentration at least three times the serum bilirubin concentration on or after postoperative day 3,” as proposed by the International Study Group of Liver Surgery. To confirm the robustness of the risk score system for bile leakage, we analyzed the independent series of 289 patients undergoing liver resection for malignancy. Results Among 81 (15.6 %) patients with bile leakage, 76 had grade A bile leakage, and five had grade C leakage and underwent reoperation. The median postoperative hospital stay was significantly longer in patients with bile leakage (median, 14 days; range, 8 to 34) than in those without bile leakage (11 days; 5 to 62; P = 0.001). There was no hepatic insufficiency or in-hospital death. The risk score model was based on the four independent predictors of postoperative bile leakage: non-anatomical resection (odds ratio, 3.16; 95 % confidence interval [CI], 1.72 to 6.07; P < 0.001), indocyanine green clearance rate (2.43; 1.32 to 7.76; P = 0.004), albumin level (2.29; 1.23 to 4.22; P = 0.01), and weight of resected specimen (1.97; 1.11 to 3.51; P = 0.02). When this risk score system was used to assign patients to low-, middle-, and high-risk groups, the frequency of bile leakage in the high-risk group was 2.64 (95 % CI, 1.12 to 6.41; P = 0.04) than that in the low-risk group. Among the independent series for validation, 4 (5.7 %), 16 (10.0 %), and 10 (16.6 %) patients in low-, middle, and high-risk groups were given a diagnosis of bile leakage after operation, respectively (P = 0.144). Conclusions Our risk score model can be used to predict the risk of bile leakage after liver resection.
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Affiliation(s)
- Takahiro Kajiwara
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Yutaka Midorikawa
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan.
| | - Shintaro Yamazaki
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Tokio Higaki
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Hisashi Nakayama
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Masamichi Moriguchi
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Shingo Tsuji
- Genome Science Division, Research Center for Advanced Science and Technologies, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan
| | - Tadatoshi Takayama
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan
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Yamazaki K, Kuboki Y, Nishina T, Shinozaki E, Shitara K, Okamoto W, Kajiwara T, Matsumoto T, Tsushima T, Mochizuki N, Fukutani M, Nakamoto M, Hasegawa Y, Sugama A, Nomura S, Sato A, Ohtsu A, Yoshino T. 2116 A multicenter phase I/II study of TAS-102 with bevacizumab for metastatic colorectal cancer refractory to standard therapies (C-TASK FORCE). Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31038-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Denda T, Shitara K, Fuji S, Kajiwara T, Yuki S, Nakajima TE, Takashima A, Kawasaki K, Tamura T, Esaki T, Daisuke N, Ebi H, Toshihiro K, Taniguchi H, Akagi K, Yamanaka T, Ochiai A, Toshihiko D, Ohtsu A, Yoshino T. 2158 The Nationwide Cancer Genome Screening Project for Gastrointestinal Cancer in Japan (GI-SCREEN): Simultaneous identification of KRAS, NRAS, BRAF, and PIK3CA mutation in advanced colorectal cancer (aCRC) (GI-SCREEN 2013-01). Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31079-6] [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: 11/15/2022]
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Matsumoto T, Nishina T, Kajiwara T, Uwazu K, Nishikawa A, Niibe Y, Kataoka M. P-050 The role of radiotherapy or chemoradiotherapy for oligo-recurrence of esophageal cancer after curative resection or chemoradiotherapy. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.50] [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] Open
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Nishina T, Kuboki Y, Shinozaki E, Yamazaki K, Kajiwara T, Shitara K, Matsumoto T, Tsushima T, Okamoto W, Mochizuki N, Nomura S, Sato A, Ohtsu A, Yoshino T. PD-017 A multicenter phase I/II study of TAS-102 with bevacizumab for metastatic colorectal cancer refractory to standard therapies (C-TASK FORCE). Ann Oncol 2015. [DOI: 10.1093/annonc/mdv234.16] [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: 11/14/2022] Open
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24
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Oda T, Taneichi H, Takahashi K, Togashi H, Hangai M, Nakagawa R, Ono M, Matsui M, Sasai T, Nagasawa K, Honma H, Kajiwara T, Takahashi Y, Takebe N, Ishigaki Y, Satoh J. Positive association of free triiodothyronine with pancreatic β-cell function in people with prediabetes. Diabet Med 2015; 32:213-9. [PMID: 25255697 DOI: 10.1111/dme.12589] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/19/2014] [Indexed: 12/12/2022]
Abstract
AIM To analyse the effects of thyroid hormones on β-cell function and glucose metabolism in people with prediabetes who are euthyroid. METHODS A total of 111 people who were euthyroid underwent 75-g oral glucose tolerance tests, of whom 52 were assigned to the normal glucose tolerance and 59 to the prediabetes groups. Homeostatic model assessment of β-cell function, insulinogenic index and areas under the curve for insulin and glucose were evaluated as indices of pancreatic β-cell function. RESULTS In both groups, BMI, fasting insulin, homeostasis model assessment ratio and HDL cholesterol correlated significantly with all indices of pancreatic β-cell function. Free triiodothyronine correlated positively with all insulin secretion indices in the prediabetes group. Multiple linear regression analysis showed that free triiodothyronine was an independent variable that had a positive correlation with all indices of β-cell function in the prediabetes group. By contrast, no such correlation was found in the normal glucose tolerance group. CONCLUSIONS Free triiodothyronine is associated with both basal and glucose-stimulated insulin secretion in people with prediabetes who are euthyroid; therefore, the regulation of insulin secretion by thyroid hormones is a potentially novel therapeutic target for the treatment of diabetes.
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Affiliation(s)
- T Oda
- Division of Diabetes and Metabolism, Department of Internal Medicine, Iwate Medical University, Morioka, Japan
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Yamaguchi K, Akagi K, Muro K, Taniguchi H, Nishina T, Kajiwara T, Denda T, Hironaka S, Kudo T, Satoh T, Okamoto W, Yoshino T. Clinical Validation of a Novel Multiplex Kit for All Ras Mutations in Colorectal Cancer: Results of Rasket(Ras Key Testing) Prospective Multicenter Study. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu326.43] [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: 11/13/2022] Open
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26
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Moriwaki T, Kajiwara T, Matsumoto T, Suzuki H, Hiroshima Y, Matsuda K, Hirai S, Yamamoto Y, Yamada T, Sugaya A, Kobayashi M, Endo S, Ishige K, Nishina T, Hyodo I. Survival analysis of platinum-refractory patients with advanced esophageal cancer treated with docetaxel or best supportive care alone: a retrospective study. Dis Esophagus 2014; 27:737-43. [PMID: 24917486 DOI: 10.1111/dote.12246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The survival benefit of second-line chemotherapy with docetaxel in platinum-refractory patients with advanced esophageal cancer (AEC) remains unclear. A retrospective analysis of AEC patients with Eastern Cooperative Oncology Group performance status (PS)≤2 was performed, and major organ functions were preserved, who determined to receive docetaxel or best supportive care (BSC) alone after failure of platinum-based chemotherapy. The post-progression survival (PPS), defined as survival time after disease progression following platinum-based chemotherapy, was analyzed by multivariate Cox regression analysis using factors identified as significant in univariate analysis of various 20 characteristics (age, sex, PS, primary tumor location, etc) including Glasgow prognostic score (GPS), which is a well-known prognostic factor in many malignant tumors. Sixty-six and 45 patients were determined to receive docetaxel and BSC between January 2007 and December 2011, respectively. The median PPS was 5.4 months (95% confidence interval [CI] 4.8-6.0) in the docetaxel group and 3.3 months (95% CI 2.5-4.0) in the BSC group (hazard ratio [HR] 0.56, 95% CI 0.38-0.84, P=0.005). Univariate analysis revealed six significant factors: treatment, PS, GPS, number of metastatic organs, liver metastasis, and bone metastasis. Multivariate analysis including these significant factors revealed three independent prognostic factors: docetaxel treatment (HR 0.62, 95% CI 0.39-0.99, P=0.043), better GPS (HR 0.61, 95% CI 0.46-0.81, P=0.001), and no bone metastasis (HR 0.31, 95% CI 0.15-0.68, P=0.003). There was a trend for PPS in favor of the docetaxel group compared with patients who refused docetaxel treatment in the BSC group (adjusted HR 0.61, 95% CI 0.29-1.29, P=0.20). Docetaxel treatment may have prolonged survival in platinum-refractory patients with AEC.
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Affiliation(s)
- T Moriwaki
- Division of Gastroenterology, University of Tsukuba, Tsukuba, Japan
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Abstract
Abstract
Based on a discovery of trans-3-hexenal and participation of isomerases and non-enzymatic isomerizing factors, the biogenetic pathway of trans-2-hexenal (leaf aldehyde) and cis-3-hexenol (leaf alcohol) has been demonstrated.
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Affiliation(s)
- A. Hatanaka
- Department of Agricultural Chemistry, Faculty of Agriculture, Yamaguchi, Japan
| | - T. Kajiwara
- Department of Agricultural Chemistry, Faculty of Agriculture, Yamaguchi, Japan
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Takane K, Midorikawa Y, Yamazaki S, Kajiwara T, Yoshida N, Kusumi Y, Takayama T. Gastrointestinal stromal tumor with nephrotic syndrome as a paraneoplastic syndrome: a case report. J Med Case Rep 2014; 8:108. [PMID: 24669929 PMCID: PMC3994271 DOI: 10.1186/1752-1947-8-108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 02/05/2014] [Indexed: 02/06/2023] Open
Abstract
Introduction Paraneoplastic syndromes are disorders associated with clinical signs and symptoms caused by substances produced by malignant disease and are not directly related to the physical effects of a primary or metastatic tumor. We describe a patient with gastrointestinal stromal tumor of the stomach accompanied by nephrotic syndrome as paraneoplastic syndrome in whom symptomatic treatment was ineffective. Nephrotic syndrome caused by gastrointestinal stromal tumors is quite rare, and to the best of our knowledge this is the first time that such a case has been documented. Case presentation We describe a 69-year-old Asian woman with a gastrointestinal stromal tumor of the stomach accompanied by paraneoplastic syndrome. The patient had severe hypoalbuminemia and proteinuria, which were apparently attributed to a gastrointestinal stromal tumor. After preoperative treatment for hypoalbuminemia, the tumor was resected and nephrotic syndrome improved. Two years after her operation, she is still alive with neither tumor recurrence nor nephrotic syndrome. Conclusion Patients with refractory nephrotic syndrome caused by a malignant tumor should be treated aggressively, even if they are in poor general condition. Otherwise, the opportunity for potentially curative surgery may be missed.
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Affiliation(s)
| | - Yutaka Midorikawa
- Department of Digestive Surgery, Nihon University School of Medicine, 30-1 Oyaguchi Kami-machi, Itabashi-ku, Tokyo 173-8610, Japan.
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Matsumoto T, Kajiwara T, Nishide N, Asagi A, Nishina T, Hori S, Nadano S, Tanimizu M, Iguchi H. Retrospective Study of L-Leucovorin and 5-FU Therapy in Gastric Cancer with Severe Ascites or Inadequate Oral Intake. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.2] [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: 11/13/2022] Open
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Hirata K, Ishida H, Hiragohri M, Nakayama Y, Kajiwara T. Experimental Assessment of Dispersion Failure of Glass Fiber Reinforced Plastics in a Twin Screw Extruder. INT POLYM PROC 2013. [DOI: 10.3139/217.2704] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
To investigate the conditions necessary for glass fiber bundle dispersion in the polymer compounding process, we developed a method for experimentally quantifying dispersion failure in this study. We employed a co-rotating twin-screw extruder in our experiment and investigated the dependence of frequency of occurrence of dispersion failure on screw configurations (a forward kneading disk (FKD) and a backward mixing screw (BMS) with different screw configurations), throughput (Q), and screw speed (Ns). From our experiments, we found that increasing the production rate promotes the occurrence of dispersion failure when a FKD is used. Dispersion failure is markedly suppressed when a BMS is used. We thus found that the production rate could be increased by using a BMS with a large length-to-diameter (L/D) ratio.
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Affiliation(s)
- K. Hirata
- Technical Solution Center, Polyplastics Co., Ltd., Fuji City, Japan
| | - H. Ishida
- Process Innovation Center, Polyplastics Co., Ltd., Fuji City, Japan
| | - M. Hiragohri
- Process Innovation Center, Polyplastics Co., Ltd., Fuji City, Japan
| | - Y. Nakayama
- Department of Chemical Engineering, Kyusyu University, Motooka
| | - T. Kajiwara
- Department of Chemical Engineering, Kyusyu University, Motooka
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31
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Abstract
Abstract
In order to evaluate the tip-clearance effect on mixing, 3-D numerical simulations were applied to kneading block section of co-rotating twin screw extruders. The software we used was originally developed for non-Newtonian and non-isothermal flow analysis based on the finite element technique. The marker-particle tracking analysis was also developed in order to estimate the particle path, residence time distribution, stress and strain history, and so on.
The stress distribution obtained by the above-mentioned simulations suggested the following mixing mechanisms. The kneading block with the small tip-clearance (TC) caused the bimodal stress distribution which had peaks in both high and low stress level. The marker-particles which overpassed the TC formed the peak at the high stress level and the other particles contributed to the peak at the low stress level. In other words, a large number of particles evaded the TC and it caused heterogeneous stress induced mixing. On the other hand, the large tip-clearance caused the narrow and sharp stress distribution because most of the particles passed over the TC. The stress level was not high, however, homogeneous stress induced mixing was expected. Since the tip-clearance applied a significant effect to the dispersive mixing, it should be optimised in accordance with the material design.
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Affiliation(s)
- T. Ishikawa
- Polymer Laboratory, Research and Development Division, Mitsubishi Chemical Group Science and Technology Research Center, Inc., Mie, Japan
| | - F. Nagano
- Polymer Laboratory, Research and Development Division, Mitsubishi Chemical Group Science and Technology Research Center, Inc., Mie, Japan
| | - T. Kajiwara
- Department of Chemical Engineering, Kyushu University, Fukuoka, Japan
| | - K. Funatsu
- Department of Chemical Engineering, Kyushu University, Fukuoka, Japan
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Yoshida N, Midorikawa Y, Kajiwara T, Yoshida N, Nakayama H, Sugitani M, Takayama T. Hepatocellular Carcinoma with Sarcomatoid Change without Anticancer Therapies. Case Rep Gastroenterol 2013; 7:169-74. [PMID: 23626518 PMCID: PMC3635691 DOI: 10.1159/000350558] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [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] [Indexed: 12/31/2022] Open
Abstract
Hepatocellular carcinoma (HCC) with sarcomatoid change is a rare neoplasm of the liver, and recurrent therapies for HCC such as transcatheter arterial chemoembolization and percutaneous ablation therapy are presumed to promote sarcomatoid change. A 73-year-old man was admitted to our hospital diagnosed as having liver cancer originating from hepatitis C-related cirrhosis without any previous treatment for HCC. Ultrasonography showed that the tumor was hypoechoic, 3 cm in diameter, with unclear margins. Computed tomography demonstrated a low-density lesion with ring enhancement on delayed phase. Under a diagnosis of poorly differentiated HCC the patient underwent liver resection. Histologically, the tumor consisted of proliferation of spindle-shaped sarcomatoid carcinoma cells with unclear trabecular and pseudoglandular structures including a nodule of typical moderately differentiated HCC, which was observed to shift mutually in one region. Here, we report a case of sarcomatoid HCC with a review of the literature.
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Affiliation(s)
- Naoki Yoshida
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
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Katoh K, Yamamoto K, Kajiwara T, Takeya J, Breedlove BK, Yamashita M. Magnetic properties of lanthanoid(III) phthalocyaninato triple-decker complexes in an external magnetic field and electronic transport properties for molecular spintronics. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/303/1/012035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kurokawa T, Moriguchi M, Kajiwara T, Mamiya T, Aramaki O, Ohkubo T, Nakayama H, Higaki T, Takayama T. [Case report of transarterial chemoembolization to lymph node metastasis of hepatocellular carcinoma]. Gan To Kagaku Ryoho 2010; 37:2699-2701. [PMID: 21224684] [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: 05/30/2023]
Abstract
We performed transarterial chemoembolization (TACE) on the 67-year-old man who had hepatectomy for hepatocellular carcinoma with hepatitis C, recurrence in the liver and lymph nodes.The metastasis in lymph node did not show a clear increase until dying, and TACE showed the possibility of one treatment method to the metastasis in lymph node of the hepatocellular carcinoma.
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Sakamoto Y, Shimada K, Nara S, Esaki M, Kajiwara T, Arai Y, Sano T, Yamamoto J, Kosuge T. Risk factors for early bilirubinemia after major hepatectomy for perihilar cholangiocarcinoma with portal vein embolization. Hepatogastroenterology 2010; 57:22-28. [PMID: 20422866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND/AIMS Major hepatectomy for perihilar cholangiocarcinoma has considerable risk of hepatic insufficiency even with preoperative portal vein embolization (PVE). Postoperative bilirubinemia is a great concern for hepatic surgeons. METHODOLOGY Between 1998 and 2004, 120 patients with hilar bile duct cancer (n = 72) and intrahepatic cholangiocarcinoma (n = 48) underwent major hepatectomies with extrahepatic biliary resection. Of these, 63 patients underwent preoperative PVE to increase the future remnant liver (FRL) volume. Risk factors for early bilirubinemia after hepatectomy (> or = 2.5 mg on day 1) were evaluated using univariate and multivariate analyses. RESULTS The median FRL volumes before surgery in patients with and without PVE were 46% and 70%, respectively. The serum total bilirubin (TB) value on day 1 after hepatectomy was higher in patients with PVE than in patients without PVE (2.9 mg/dL vs 1.9 mg/dL, p < 0.0001). However, the significant risk factors for higher bilirubinemia on day 1 were preoperative TB value > or = 1.0 mg/ dL (p = 0.01), blood loss > or = 1.8L (p = 0.01), and blood transfusion (p = 0.03). Two patients developed postoperative hepatic failure and one patient died of surgery from septic complication. CONCLUSION Major hepatectomies for perihilar cholangiocarcinoma were performed with acceptable safety using preoperative PVE. Postoperative early bilirubinemia was not associated with the FRL volume in this setting.
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Affiliation(s)
- Yoshihiro Sakamoto
- Hepatobiliary and Pancreatic Surgery Division, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
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Yoshino H, Kachi E, Shimizu H, Taniuchi M, Yano K, Udagawa H, Kajiwara T, Shimoyama K, Ishikawa K. Severity of residual stenosis of infarct-related lesion and left ventricular function after single-vessel anterior wall myocardial infarction: implication of ST-segment elevation in lead aVL of the admission electrocardiograms. Clin Cardiol 2009; 23:175-80. [PMID: 10761805 PMCID: PMC6654902 DOI: 10.1002/clc.4960230309] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND The relationship between the severity of chronic-phase stenosis of infarct-related lesions (IRLs) and chronic left ventricular function in anterior acute myocardial infarctions (AMI) has not been adequately investigated. HYPOTHESIS This study investigated whether ST elevation in lead aVL of admission electrocardiogram (ECG) would be a determinant factor of the relationship between the severity of stenosis of the IRL and chronic left ventricular function after anterior wall AMI. METHODS One month after AMI, the IRL was evaluated by coronary angiography in 98 patients with anterior AMI, and left ventricular ejection fraction (LVEF) was determined using multigated radionuclide angiocardiography. Patients were classified according to the severity of the IRL: patients with 100% occlusion (Group O), patients with 90 to 99% stenosis (Group H), and patients with < or =75% stenosis (Group L). Patients with ST elevation > or =0.1 mV in the aVL lead on their admission ECG were included in the ST-elevation group, and those with ST elevation <0.1 mV were included in the non-ST-elevation group. RESULTS The LVEF was greater in the non-ST-elevation group than in the ST-elevation group (p<0.0001), and the LVEF in a whole group as follows: Group L LVEF>Group H LVEF>Group O LVEF (p = 0.0160). In the ST-elevation group, LVEF was higher in Group L than in the other groups (p = 0.0251). There were three independent predictors of a reduced LVEF: ST-elevation in aVL [odds ratio (OR): 3.38, p = 0.0044], IRL stenosis > or =90% (OR: 2.90, p = 0.0044), and the IRL occurring in the left anterior descending artery proximal to the first diagonal branch (OR: 6.31, p = 0.0024). CONCLUSION Left ventricular function was preserved, regardless of the severity of residual stenosis, in patients without ST elevation in aVL if the IRL was not totally occluded. In patients with ST elevation in aVL, LVEF was lower in patients with more severe stenosis, even if the IRL was patent.
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Affiliation(s)
- H Yoshino
- Second Department of Internal Medicine, Kyorin University School of Medicine, Tokyo, Japan
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Aoshima H, Kajiwara T, Hatanaka A, Nakatani H, Hiromi K. Modification of lipoxygenase by hydrogen peroxide and photooxidation. Int J Pept Protein Res 2009; 10:219-25. [PMID: 21143 DOI: 10.1111/j.1399-3011.1977.tb01736.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The kinetic study of fluorescence stopped-flow method suggested that the interaction between lipoxygenase and H2O2 is consistent with a simple irreversible one-step mechanism. The activation energy of the reaction was 7.2 kcal/mol. Participation of an ionizable group with pK about 8.8, possibly a histidine residue, was suggested from the pH-dependence of the rate constant. No further fluorescence quenching of lipoxygenase was observed when the product was added to the lipoxygenase solution before mixing the lipoxygenase and H2O2 solutions. The fluorescence quenching of lipoxygenase by H2O2 was in parallel with the inactivation of the enzyme. Hydroperoxylinoleic acid strongly protects the inactivation of lipoxygenase caused by H2O2. These results are consistent with an interpretation that OH- and/or O- - are produced when the iron of the enzyme is oxidized by H2O2, which in turn will attack some amino acid essential for the enzyme activity. The pH-dependence of the inactivation rate constant of photooxidation of lipoxygenase sensitized by methylene blue indicated that an ionizable group with pK about 8.8 is concerned with the enzymatic activity. In contrast to the inactivation of lipoxygenase by H2O2, the product protected the inactivation of the enzyme by photooxidation only at high concentration.
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Sakamoto Y, Kajiwara T, Esaki M, Shimada K, Nara S, Kosuge T. Roux-en-Y reconstruction using staplers during pancreaticoduodenectomy: results of a prospective preliminary study. Surg Today 2009; 39:32-7. [PMID: 19132465 DOI: 10.1007/s00595-008-3814-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Accepted: 05/28/2008] [Indexed: 12/23/2022]
Abstract
PURPOSE The aim of this study was to reveal the utility of alimentary reconstruction using staplers during pancreaticoduodenectomy (PD), focusing on the occurrence of delayed gastric emptying. METHODS Between 2003 and 2007, 72 PDs with alimentary reconstruction were performed by a single surgeon. Since August 2006, the new Roux-en-Y reconstruction methods using staplers were applied in 26 of the patients. We compared their clinical outcomes with those of the 46 patients who underwent PD using the conventional hand-sewn reconstruction methods. RESULTS The results of upper gastrointestinal study showed improvement within 10 postoperative days (PODs; P = 0.03): the patients resumed eating their regular diet sooner (13 vs 6 days, P < 0.001), and both the incidence of delayed gastric emptying (43% vs 19%, P = 0.04) and the hospital stay (27 vs 21 days, P = 0.008) were reduced significantly in patients with stapled reconstruction. Despite the fact that operative costs were significantly higher for patients with stapled reconstruction (P = 0.009), hospital costs were significantly lower (P = 0.049) for those who underwent the conventional method. CONCLUSIONS Our retrospective analysis shows that stapled reconstructions might reduce the incidence of delayed gastric emptying; however, further study will be necessary to evaluate the utility of this new method.
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Affiliation(s)
- Yoshihiro Sakamoto
- Hepatobiliary and Pancreatic Surgery Division, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
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Takagi H, Numazaki M, Kajiwara T, Abe Y, Ishii M, Kato C, Kojima N. Cooperation of specific ICAM-3 grabbing nonintegrin-related 1 (SIGNR1) and complement receptor type 3 (CR3) in the uptake of oligomannose-coated liposomes by macrophages. Glycobiology 2008; 19:258-66. [DOI: 10.1093/glycob/cwn128] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
OBJECTIVE The use of embryonic stem cells (ES cells) has recently received much attention as a novel cell source for various hybrid artificial organs. To use ES cells, it is necessary to be able to produce functional mature cells from ES cells in large quantities. We applied HF/organoid culture, where cultured cells formed cylindrical multicellular aggregates (organoids) in the lumen of hollow fibers, to mouse and cynomolgus monkey ES cells for hepatic differentiation. MATERIALS AND METHODS ES cells were injected into hollow fibers. The hollow fibers were centrifuged to induce organoid formation and cultured in medium including factors for hepatic differentiation. To determine the characteristics of cells in the bundle, we evaluated gene expression and liver-specific functions. RESULTS ES cells immobilized inside hollow fibers proliferated and formed cylindrical organoids. In mouse ES cell cultures, the expression of mRNAs of hepatocyte-specific genes increased with culture time. Ammonia removal activity detected at 15 days increased with culture time. Albumin secretion activity detected at 12 days increased by 21 days. In cynomolgus monkey ES cell cultures, ES cells showed spontaneous ammonia removal functions. The maximum levels of these functions per unit volume of the hollow fibers were roughly comparable to those of primary hepatocyte-organoids. CONCLUSIONS ES cells differentiated into hepatocyte-like cells using the organoid culture technique. The results indicated that the combination of ES cells and an organoid culture technique was useful to obtain mature hepatocytes.
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Affiliation(s)
- H Mizumoto
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan
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Aoki K, Mizumoto H, Nakazawa K, Funatsu K, Kajiwara T. Evaluation of a hybrid artificial liver module with liver lobule-like structure in rats with liver failure. Int J Artif Organs 2008; 31:55-61. [PMID: 18286455 DOI: 10.1177/039139880803100108] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We studied the recovery of rats with fulminant hepatic failure (FHF) by treating them with our original hybrid artificial liver support system (HALSS). We developed an original artificial liver module having a liver lobule-like structure (LLS). This module consists of many hollow fibers regularly arranged in close proximity and hepatocyte aggregates (organoids) induced into the extra capillary space of the module by centrifugal force. The LLS module can express some liver specific functions at high levels and maintain them for several months in vitro. In this study, we evaluated the efficacy of our LLS-HALSS by using rats with FHF induced by a method that combined partial hepatectomy with hepatic ischemia. In the animal experiments, blood ammonia levels rapidly increased in the control group (sham-HALSS group). These rats died during or immediately after application of the sham-HALLS. On the other hand, in the LLS module application group (LLS-control group), the increase in blood ammonia was completely suppressed and all rats recovered. Blood constituents at 4 weeks after application were at normal levels, and the weight of the liver was the same as that of a normal rat. These results indicate that HALSS may be useful for treating liver failure patients until liver transplantation can be performed or until regeneration of the native liver occurs.
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Affiliation(s)
- K Aoki
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Fukuoka - Japan
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Matsumoto K, Mizumoto H, Nakazawa K, Ijima H, Funatsu K, Kajiwara T. Hepatic Differentiation of Mouse Embryonic Stem Cells in a Bioreactor Using Polyurethane/Spheroid Culture. Transplant Proc 2008; 40:614-6. [DOI: 10.1016/j.transproceed.2008.01.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Matsubara J, Nishina T, Yamada Y, Moriwaki T, Shimoda T, Kajiwara T, Nakajima TE, Kato K, Hamaguchi T, Shimada Y, Okayama Y, Oka T, Shirao K. Impacts of excision repair cross-complementing gene 1 (ERCC1), dihydropyrimidine dehydrogenase, and epidermal growth factor receptor on the outcomes of patients with advanced gastric cancer. Br J Cancer 2008; 98:832-9. [PMID: 18231104 PMCID: PMC2259181 DOI: 10.1038/sj.bjc.6604211] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Using laser-captured microdissection and a real-time RT-PCR assay, we quantitatively evaluated mRNA levels of the following biomarkers in paraffin-embedded gastric cancer (GC) specimens obtained by surgical resection or biopsy: excision repair cross-complementing gene 1 (ERCC1), dihydropyrimidine dehydrogenase (DPD), methylenetetrahydrofolate reductase (MTHFR), epidermal growth factor receptor (EGFR), and five other biomarkers related to anticancer drug sensitivity. The study group comprised 140 patients who received first-line chemotherapy for advanced GC. All cancer specimens were obtained before chemotherapy. In patients who received first-line S-1 monotherapy (69 patients), low MTHFR expression correlated with a higher response rate (low: 44.9% vs high: 6.3%; P=0.006). In patients given first-line cisplatin-based regimens (combined with S-1 or irinotecan) (43 patients), low ERCC1 correlated with a higher response rate (low: 55.6% vs high: 18.8%; P=0.008). Multivariate survival analysis of all patients demonstrated that high ERCC1 (hazard ratio (HR): 2.38 (95% CI: 1.55-3.67)), high DPD (HR: 2.04 (1.37-3.02)), low EGFR (HR: 0.34 (0.20-0.56)), and an elevated serum alkaline phosphatase level (HR: 1.00 (1.001-1.002)) were significant predictors of poor survival. Our results suggest that these biomarkers are useful predictors of clinical outcomes in patients with advanced GC.
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Affiliation(s)
- J Matsubara
- Gastrointestinal Oncology Division, National Cancer Center Hospital, 5-1-1 Tsukiji, Tokyo 1040045, Japan
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Asakawa M, Sakamoto Y, Kajiwara T, Nara S, Esaki M, Shimada K, Hamaguchi T, Kosuge T. Simple segmental resection of the second portion of the duodenum for the treatment of gastrointestinal stromal tumors. Langenbecks Arch Surg 2007; 393:605-9. [PMID: 18026747 DOI: 10.1007/s00423-007-0243-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Accepted: 10/25/2007] [Indexed: 12/16/2022]
Abstract
BACKGROUND Adequate surgical procedure for gastrointestinal stromal tumors (GISTs) arising in the second portion of the duodenum remains controversial. MATERIALS AND METHODS Segmental resection of the second portion of the duodenum and Roux-en-Y reconstruction was performed in two patients with duodenal GISTs. In case 1, a huge tumor arising from the second portion of the duodenum occupied the right upper quadrant of the abdomen. Preoperative treatment using imatinib mesylate decreased the tumor size from 22 to 8 cm. In case 2, the tumor was located in the second portion of the duodenum longitudinally. In both of the cases, the major papilla was preserved. RESULTS The postoperative course was uneventful, and they were discharged on day 11. Surgical margins were negative. CONCLUSION The present simple segmental duodenectomy can be applied in the treatment of GISTs or other low-grade malignancies.
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Affiliation(s)
- Masami Asakawa
- Hepatobiliary and Pancreatic Surgery Division, National Cancer Center Hospital, Tokyo, Japan
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Kajiwara T, Sakamoto Y. A case of cholangiocarcinoma mimicking inflammatory pseudotumor. Jpn J Clin Oncol 2007; 37:555. [PMID: 17720741 DOI: 10.1093/jjco/hym088] [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: 11/14/2022] Open
Affiliation(s)
- Takahiro Kajiwara
- Hepatobiliary and Pancreatic Surgery Division, National Cancer Center Hospital, Tokyo, Japan
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Nishina T, Matsubara J, Toshikazu M, Yamada Y, Kajiwara T, Shimoda T, Okayama Y, Sugimoto Y, Oka T, Shirao K. Clinical significance of dihydropyrimidine dehydrogenase (DPD), epidermal growth factor receptor (EGFR), and excision repair cross-complementing gene 1 (ERCC1) gene expression of tumor tissue in patients with advanced gastric cancer. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.4629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4629 Background: Many methods for predicting the susceptibility of a gastric cancer(GC) to chemotherapy have been investigated. However, the clinical significance of biomarkers in GC cells remains unclear. There is a need for exploratory evaluations to understand the clinical implications of biomarkers. Methods: This study consisted of 151 patients (pts) who received chemotherapy for advanced GC. cDNA was derived from the laser-captured tumor cells of cancer specimens obtained by surgical resection or endoscopic biopsy and analyzed to determine mRNA expression relative to an internal reference gene (β-actin) using real-time RT-PCR method. Gene expression levels of thymidylate synthase (TS), DPD, orotate phosphoribosyl transferase, dihydrofolate reductase (DHFR), ERCC-1, EGFR and 22 other biomarkers related to anticancer drug sensitivity were measured. Results: DPD, EGFR, and ERCC1 gene expressions were significantly correlated with survival ( Table ). Multivariate analysis revealed that high DPD (p=0.0002, RR=2.67 [95% CI, 1.62–4.25]), low EGFR (p=0.0005, RR=0.29 [0.18–0.50]), and high ERCC1 (p<0.0001, RR=2.27 [1.45–3.47]) gene expressions were independently related to poor survival. As for first-line chemotherapy, an analysis of 60 pts treated with S-1 showed that low DHFR gene expression significantly correlated with a longer time to progression (TTP) (p=0.0017). An analysis of 54 pts who received cisplatin containing regimens ( + irinotecan or + S-1) as first-line therapy showed that low ERCC1 gene expression was slightly related to a better response (p=0.053). Conclusions: These results indicate that expression of DPD, ERCC1, and EGFR gene expressions in cancer specimens have predictive value for the outcome of advanced GC pts treated with chemotherapy. Low DHFR gene expression could be a predictor of a long TTP in patients receiving S-1 therapy. [Table: see text] No significant financial relationships to disclose.
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Affiliation(s)
- T. Nishina
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - J. Matsubara
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - M. Toshikazu
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Y. Yamada
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - T. Kajiwara
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - T. Shimoda
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Y. Okayama
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Y. Sugimoto
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - T. Oka
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
| | - K. Shirao
- National Hospital Org. Shikoku Cancer Center, Matsuyama, Japan; National Cancer Center Hospital, Tokyo, Japan; Taiho Pharmaceutical Co., Ltd., Tokushima, Japan
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Kajiwara T, Nishina T, Hyodo I, Moriwaki T, Endo S, Nasu J, Hori S, Iguchi H, Hiasa Y, Onji M. Impact of gene expression of orotate phosphoribosyl transferase for complete response to chemoradiotherapy in patients with squamous cell carcinoma of the esophagus. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.4566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4566 Background: Chemoradiotherapy (CRT) is a potential alternative to surgery in patients with squamous cell carcinoma of the esophagus. Complete response (CR) to CRT is essential for a good prognosis and there is a need for a predictive method of CR in CRT. Methods: The pretreatment formalin-fixed, paraffin-embedded endoscopic tumor biopsy material was obtained from 41 patients treated with a definitive concurrent CRT (5-FU/CDDP and 60 Gy) for esophageal cancer (cStage II or III). cDNA was derived from tumor cells of biopsy specimens by the laser capture microdissection and analyzed to determine mRNA expression relative to an internal reference gene (β-actin) using fluorescence-based, real-time reverse transcription PCR. Gene expression levels of thymidylate synthase, thymidine phosphorylase, dihydropyrimidine dehydrogenase, orotate phosphoribosyl transferase (OPRT), metylenetetrahydrofolate reductase, dihydrofolate reductase (DHFR), excision repair cross-complementing gene 1, vascular endothelial growth factor, epidermal growth factor receptor and matrix metalloproteinase 9 (MMP-9) were measured. Results: Median gene expression levels of OPRT and DHFR were significantly higher in CR patients (p=0.0206 and 0.0191, respectively). MMP-9 was significantly lower in CR patients (p=0.0436). When the median values of the gene expression levels were selected as the cutoff values, CR rate was significantly higher in the high OPRT group and high DHFR group (p=0.0104 and 0.0104, respectively). However, there was no statistical difference in CR rate between the low MMP-9 group and the high MMP-9 group. Multivariate analysis, including clinical stage and biomarkers, revealed that high OPRT gene expression was an independent predictive factor of CR (p=0.0329, relative risk=6.65, 95% confidence interval, 1.17–37.89%). Conclusions: The measurement of OPRT gene expression in tumor biopsies may be a predictive factor of CR to CRT in patients with squamous cell carcinoma of the esophagus. No significant financial relationships to disclose.
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Affiliation(s)
- T. Kajiwara
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - T. Nishina
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - I. Hyodo
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - T. Moriwaki
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - S. Endo
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - J. Nasu
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - S. Hori
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - H. Iguchi
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - Y. Hiasa
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
| | - M. Onji
- National Hospital Organization Shikoku Cancer Cent, Matsuyama, Japan; University of Tsukuba, Tsukuba, Japan; Ehime University Graduate School of Medicine, Toon, Japan
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Sakamoto Y, Shimada K, Esaki M, Kajiwara T, Sano T, Kosuge T. Wrapping the Stump of the Gastroduodenal Artery Using the Falciform Ligament During Pancreaticoduodenectomy. J Am Coll Surg 2007; 204:334-6. [PMID: 17254940 DOI: 10.1016/j.jamcollsurg.2006.11.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Revised: 11/16/2006] [Accepted: 11/16/2006] [Indexed: 11/26/2022]
Affiliation(s)
- Yoshihiro Sakamoto
- Hepatobiliary and Pancreatic Surgery Division, National Cancer Center Hospital, Tokyo, Japan
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Tomita Y, Shimizu I, Iwai T, Zhang QW, Okano S, Kajiwara T, Onzuka T, Tominaga R. Application of chimerism-based drug-induced tolerance to rat into mouse xenotransplantation. Scand J Immunol 2006; 64:392-7. [PMID: 16970680 DOI: 10.1111/j.1365-3083.2006.01831.x] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The current critical shortage of human donor organs has stimulated the feasibility of the xenogenic transplantation, such as swine to primate. We have previously reported the induction of donor-specific tolerance in MHC-disparated recipient mice by using our cyclophosphamide (CP)-induced tolerance conditioning. In this study, we examined the efficacy of our CP-induced tolerance conditioning in xenogenic transplantation model. F344 rats and B10 mice were used as donors and recipients. Recipient mice were treated with donor spleen cells, CP, Busulfan and bone marrow cells, with or without prior NK-cell depletion. Donor mixed chimerism, and the presence of donor reactive T-cell population were analysed by flow cytometry. The survival of the donor skin grafts were observed after the conditioning. Donor mixed chimerism was temporary induced but terminated at 10 weeks after treatments. Donor-specific prolongation of the skin graft survival was observed after the treatments, however, grafts were rejected in the long term. NK-cell depletion, prior to the treatments, did not affect the levels of the mixed chimerism or graft prolongation. The donor-reactive recipient T-cell population was remained the same level as the untreated mice, suggesting the failure of the induction of the central T-cell tolerance. Thus, partial efficacy of our CP-induced tolerance treatments in the rat to mice xenotransplantation was observed. Our results suggested that the additional treatments were required to establish the stable xenogenic tolerance.
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Affiliation(s)
- Y Tomita
- Department of Cardiovascular Surgery, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
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