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Okuno M, Yamana K, Kawamura S, Nishimura K, Hino S, Kawasaki R, Ikeda A. Selective Photodynamic Activity of Tetrakis(4-aminophenyl)porphyrins with and without Acetyl Protecting Groups on Cancer and Normal Cells. Chemistry 2023; 29:e202301385. [PMID: 37334625 DOI: 10.1002/chem.202301385] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/05/2023] [Accepted: 06/16/2023] [Indexed: 06/20/2023]
Abstract
Tetrakis(4-aminophenyl)porphyrin (1) and tetrakis(4-acetamidophenyl)porphyrin (2) were dissolved in water with the incorporation of a polysaccharide (λ-carrageenan (CGN)) as a water-solubilizing agent. Although the photodynamic activity of the CGN-2 complex was considerably lower than that of the CGN-1 complex, the selectivity index (SI; IC50 in a normal cell/IC50 in a cancer cell) of the CGN-2 complex was considerably higher than that of the CGN-1 complex. This is because the photodynamic activity of the CGN-2 complex was significantly affected by the intracellular uptakes by the normal and cancer cells. During in vivo experiments, the CGN-2 complex inhibited tumor growth under light irradiation with high blood retention compared with the CGN-1 complex and Photofrin, which exhibited lower blood retention. This study showed that the photodynamic activity and SI are influenced by substituent groups of arene in the meso-positions of porphyrin analogs.
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Affiliation(s)
- Masafumi Okuno
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Keita Yamana
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Shogo Kawamura
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Kotaro Nishimura
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Shodai Hino
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
| | - Riku Kawasaki
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Atsushi Ikeda
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
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Okuno M, Yamana K, Kawasaki R, Konishi Y, Ono T, Ishi-i T, Ikeda A. Aqueous solutions with information on solids: room-temperature phosphorescence of polysaccharide-benzophenone complexes. RSC Adv 2023; 13:3528-3533. [PMID: 36756551 PMCID: PMC9891091 DOI: 10.1039/d2ra08205e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 01/18/2023] [Indexed: 01/27/2023] Open
Abstract
Benzophenone and its derivatives emit crystallization-induced phosphorescence despite their simple structures. To easily modify their phosphorescence properties, we prepared phosphorescence-emitting aqueous solutions of polysaccharide-benzophenone and polysaccharide-4,4'-difluorobenzophenone complexes, which exhibit excellent biocompatibility and biodegradability.
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Affiliation(s)
- Masafumi Okuno
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University1-4-1 KagamiyamaHigashi-Hiroshima739-8527Japan
| | - Keita Yamana
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University1-4-1 KagamiyamaHigashi-Hiroshima739-8527Japan
| | - Riku Kawasaki
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University1-4-1 KagamiyamaHigashi-Hiroshima739-8527Japan
| | - Yuto Konishi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University744 Motooka, Nishi-kuFukuoka819-0395Japan
| | - Toshikazu Ono
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University744 Motooka, Nishi-kuFukuoka819-0395Japan
| | - Tsutomu Ishi-i
- Department of Biochemistry and Applied Chemistry, National Institute of Technology, Kurume College1-1-1 KomorinoKurume830-8555Japan
| | - Atsushi Ikeda
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University1-4-1 KagamiyamaHigashi-Hiroshima739-8527Japan
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Kawamura S, Kawasaki R, Hino S, Yamana K, Okuno M, Eto T, Ikeda A. Formulation of water-dispersible hydrophobic compound nanocomplexes with polypeptides via a supramolecular approach using a high-speed vibration milling technique. RSC Adv 2022; 12:32012-32019. [DOI: 10.1039/d2ra06054j] [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] [Received: 09/26/2022] [Accepted: 11/02/2022] [Indexed: 11/10/2022] Open
Abstract
Polypeptides were used to solubilize functional hydrophobic molecules via a high-speed vibrational milling method.
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Affiliation(s)
- Shogo Kawamura
- Program of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, 739-8527, Japan
| | - Riku Kawasaki
- Program of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, 739-8527, Japan
| | - Shodai Hino
- Program of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, 739-8527, Japan
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, AIST, 1-8-31 Midorigaoka, Ikeda, 563-8577, Japan
| | - Keita Yamana
- Program of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, 739-8527, Japan
| | - Masafumi Okuno
- Program of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, 739-8527, Japan
| | - Takuro Eto
- Program of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, 739-8527, Japan
| | - Atsushi Ikeda
- Program of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, 739-8527, Japan
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Ushijima K, Okuno M, Ayabe T, Kikuchi N, Kawamura T, Urakami T, Yokota I, Amemiya S, Uchiyama T, Kikuchi T, Ogata T, Sugihara S, Fukami M. Low prevalence of maternal microchimerism in peripheral blood of Japanese children with type 1 diabetes. Diabet Med 2020; 37:2131-2135. [PMID: 31872455 DOI: 10.1111/dme.14221] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/19/2019] [Indexed: 01/07/2023]
Abstract
AIM To clarify the prevalence and degree of maternal microchimerism in Japanese children with type 1 diabetes, as well as its effect on phenotypic variation. METHODS We studied 153 Japanese children with type 1 diabetes, including 124 children positive for β-cell autoantibodies, and their 71 unaffected siblings. The number of circulating microchimeric cells per 105 host cells was estimated by the use of quantitative-polymerase chain reaction targeting non-transmitted maternal human leukocyte antigen alleles. The results were compared to previous data from white European people. Phenotypic comparison was performed between maternal microchimerism carriers and non-carriers with diabetes. RESULTS Maternal microchimerism was detected in 15% of children with autoantibody-positive type 1 diabetes, 28% of children with autoantibody-negative type 1 diabetes, and 16% of unaffected siblings. There were no differences in the prevalence or levels of maternal microchimerism among the three groups or between the children with type 1 diabetes and their unaffected siblings. Furthermore, maternal microchimerism carriers and non-carriers exhibited similar phenotypes. CONCLUSIONS Maternal microchimerism appears to be less common in Japanese children with type 1 diabetes than in white European people. Our data indicate that maternal microchimerism is unlikely to be a major trigger or a phenotypic determinant of type 1 diabetes in Japanese children and that the biological significance of maternal microchimerism in type 1 diabetes may differ among ethnic groups.
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Affiliation(s)
- K Ushijima
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - M Okuno
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - T Ayabe
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - N Kikuchi
- Department of Paediatrics, Yokohama Rosai Hospital, Yokohama, Japan
| | - T Kawamura
- Department of Paediatrics, Osaka City University School of Medicine, Osaka, Japan
| | - T Urakami
- Department of Paediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - I Yokota
- Department of Paediatrics, Division of Paediatric Endocrinology and Metabolism, Shikoku Medical Centre for Children and Adults, Kagawa, Japan
| | - S Amemiya
- Department of Paediatrics, Saitama Medical University, Faculty of Medicine, Saitama, Japan
| | - T Uchiyama
- Department of Human Genetics, National Research Institute for Child Health and Development, Tokyo, Japan
| | - T Kikuchi
- Department of Paediatrics, Saitama Medical University, Faculty of Medicine, Saitama, Japan
| | - T Ogata
- Department of Paediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - S Sugihara
- Department of Paediatrics, Tokyo Women's Medical University Medical Centre East, Tokyo, Japan
| | - M Fukami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
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Vega EA, De Aretxabala X, Qiao W, Newhook TE, Okuno M, Castillo F, Sanhueza M, Diaz C, Cavada G, Jarufe N, Munoz C, Rencoret G, Vivanco M, Joechle K, Tzeng CWD, Vauthey JN, Vinuela E, Conrad C. Comparison of oncological outcomes after open and laparoscopic re-resection of incidental gallbladder cancer. Br J Surg 2020; 107:289-300. [PMID: 31873948 DOI: 10.1002/bjs.11379] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/22/2019] [Accepted: 09/04/2019] [Indexed: 02/03/2023]
Abstract
BACKGROUND The safety and oncological efficacy of laparoscopic re-resection of incidental gallbladder cancer have not been studied. This study aimed to compare laparoscopic with open re-resection of incidentally discovered gallbladder cancer while minimizing selection bias. METHODS This was a multicentre retrospective observational cohort study of patients with incidental gallbladder cancer who underwent re-resection with curative intent at four centres between 2000 and 2017. Overall survival (OS) and recurrence-free survival (RFS) were analysed by intention to treat. Inverse probability of surgery treatment weighting using propensity scoring was undertaken. RESULTS A total of 255 patients underwent re-resection (190 open, 65 laparoscopic). Nineteen laparoscopic procedures were converted to open operation. Surgery before 2011 was the only factor associated with conversion. Duration of hospital stay was shorter after laparoscopic re-resection (median 4 versus 6 days; P < 0·001). Three-year OS rates for laparoscopic and open re-resection were 87 and 62 per cent respectively (P = 0·502). Independent predictors of worse OS were residual cancer found at re-resection (hazard ratio (HR) 1·91, 95 per cent c.i. 1·17 to 3·11), blood loss of at least 500 ml (HR 1·83, 1·23 to 2·74) and at least four positive nodes (HR 3·11, 1·46 to 6·65). In competing-risks analysis, the RFS incidence was higher for laparoscopic re-resection (P = 0·038), but OS did not differ between groups. Independent predictors of worse RFS were one to three positive nodes (HR 2·16, 1·29 to 3·60), at least four positive nodes (HR 4·39, 1·96 to 9·82) and residual cancer (HR 2·42, 1·46 to 4·00). CONCLUSION Laparoscopic re-resection for selected patients with incidental gallbladder cancer is oncologically non-inferior to an open approach. Dissemination of advanced laparoscopic skills and timely referral of patients with incidental gallbladder cancer to specialized centres may allow more patients to benefit from this operation.
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Affiliation(s)
- E A Vega
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - X De Aretxabala
- Department of Surgery, Hepato-Bilio-Pancreatic Surgery Unit, Clinica Alemana, Santiago, Chile
| | - W Qiao
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - T E Newhook
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - M Okuno
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - F Castillo
- Department of Surgery, Hepato-Bilio-Pancreatic Surgery Unit, Clinica Alemana, Santiago, Chile
| | - M Sanhueza
- Department of Digestive Surgery, Hepato-Bilio-Pancreatic Surgery Unit, Surgery Service, Hospital Sotero Del Rio, Santiago, Chile.,Department of Digestive Surgery, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - C Diaz
- Department of Digestive Surgery, Hepato-Bilio-Pancreatic Surgery Unit, Surgery Service, Hospital Sotero Del Rio, Santiago, Chile.,Department of Digestive Surgery, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - G Cavada
- Department of Biostatistics, Clínica Alemana-Universidad del Desarrollo, Santiago, Chile
| | - N Jarufe
- Department of Digestive Surgery, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - C Munoz
- Department of Digestive Surgery, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - G Rencoret
- Department of Surgery, Hepato-Bilio-Pancreatic Surgery Unit, Clinica Alemana, Santiago, Chile
| | - M Vivanco
- Department of Surgery, Hepato-Bilio-Pancreatic Surgery Unit, Clinica Alemana, Santiago, Chile
| | - K Joechle
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - C-W D Tzeng
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - J-N Vauthey
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - E Vinuela
- Department of Digestive Surgery, Hepato-Bilio-Pancreatic Surgery Unit, Surgery Service, Hospital Sotero Del Rio, Santiago, Chile.,Department of Digestive Surgery, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - C Conrad
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Tsuboi M, Zenke Y, Chiba Y, Satouchi M, Mitsuoka S, Shimizu J, Daga H, Fujimoto D, Mori M, Aoki T, Sawa T, Omori S, Saka H, Iwamoto Y, Okuno M, Hirashima T, Kashiwabara K, Tachihara M, Yamamoto N, Nakagawa K. Histological type analysis of 10-year follow-up of WJTOG0105: A phase III study comparing second- and third-generation regimens with concurrent thoracic radiotherapy in unresectable stage III non-small cell lung cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz436.004] [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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Kunimasa K, Ito K, Yamanaka T, Fujimoto D, Mori M, Maeno K, Tomomatsu K, Tamura A, Tanaka H, Watanabe S, Teraoka S, Hataji O, Suzuki K, Hontsu S, Hara S, Bessho A, Kubo A, Okuno M, Nakagawa K, Yamamoto N. The safety assessment of crizotinib and alectinib from real-world data of 840 ALK-inhibitor naïve patients with NSCLC harboring ALK-rearrangement (WJOG9516L). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.066] [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: 11/14/2022] Open
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Zenke Y, Tsuboi M, Chiba Y, Satouchi M, Mitsuoka S, Shimizu J, Daga H, Fujimoto D, Mori M, Aoki T, Sawa T, Omori S, Saka H, Iwamoto Y, Okuno M, Hirashima T, Kshiwabara K, Tachihara M, Yamamoto N, Nakagawa K. Phase III study comparing second- and third-generation regimens with concurrent thoracic radiotherapy in patients with unresectable stage III non-small cell lung cancer: 10-year follow-up of West Japan thoracic oncology group WJTOG0105. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz259.001] [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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Yamaguchi T, Morikawa S, Yuko O, Asada K, Oguri T, Inui N, Ito K, Kimura T, Kunii E, Matsui T, Kubo A, Kato T, Shindo J, Tsuda T, Okuno M, Hida T, Imaizumi K. P083 Efficacy of EGFR-TKIs in Patients Harboring EGFR Mutations with Non-Adenocartinoma Histology. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.10.096] [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: 11/17/2022]
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Tanaka K, Inui N, Asada K, Abe T, Hataji O, Hayai S, Ito K, Imaizumi K, Kimura T, Kubo A, Kunii E, Murotani K, Okuno M, Oya Y, Shindoh J, Taniguchi H, Tsuda T, Yamaguchi T, Hida T, Suda T. Real-world data of EGFR minor mutated NSCLC treated with EGFR-TKI: Comparative analysis including compound mutation and de novo T790M mutation. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy425.032] [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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Ito K, Murotani K, Kubo A, Kunii E, Taniguchi H, Shindo J, Asada K, Imaizumi K, Tanaka K, Inui N, Okuno M, Hataji O, Hayai S, Abe T, Kimura T, Tsuda T, Yamaguchi T, Oya Y, Yoshida T, Hida T. Comparative analysis of overall survival using propensity score between first- and second-generation EGFR-TKI: Real world data of 1354 patients with EGFR mutant NSCLC. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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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Takahashi K, Kondo C, Inukai A, Asai G, Okuno M, Saito H. PD-1 inhibitor-related pneumonitis in patients with minimal interstitial lung shadows before treatment. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy288.080] [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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13
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Okuno M, Goumard C, Mizuno T, Kopetz S, Omichi K, Tzeng CWD, Chun YS, Lee JE, Vauthey JN, Conrad C. Prognostic impact of perihepatic lymph node metastases in patients with resectable colorectal liver metastases. Br J Surg 2018; 105:1200-1209. [PMID: 29664996 DOI: 10.1002/bjs.10822] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 12/11/2017] [Accepted: 12/13/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND Although perihepatic lymph node metastases (PLNMs) are known to be a poor prognosticator for patients with colorectal liver metastases (CRLMs), optimal management remains unclear. This study aimed to determine the risk factors for PLNMs, and the survival impact of their number and location in patients with resectable CRLMs. METHODS Data on patients with CRLM who underwent hepatectomy during 2003-2014 were analysed retrospectively. Recurrence-free (RFS) and overall (OS) survival were calculated according to presence, number and location of PLNMs. Risk factors for PLNM were evaluated by logistic regression analysis. RESULTS Of 1485 patients, 174 underwent lymphadenectomy, and 54 (31·0 per cent) had PLNM. Ten patients (5·7 per cent) who had lymphadenectomy and 176 (13·4 per cent) who did not underwent repeat hepatectomy. Survival of patients with PLNM was significantly poorer than that of patients without (RFS: 5·3 versus 13·8 months, P < 0·001; OS: 20·5 versus 71·3 months; P < 0·001). Median OS was significantly better in patients with para-aortic versus hepatoduodenal ligament PLNMs (58·2 versus 15·5 months; P = 0·011). Patients with three or more PLNMs had significantly worse median OS than those with one or two (16·3 versus 25·4 months; P = 0·039). The presence of primary tumour lymph node metastases (odds ratio 2·35; P = 0·037) and intrahepatic recurrence requiring repeat hepatectomy (odds ratio 5·61; P = 0·012) were significant risk factors for PLNM on multivariable analysis. CONCLUSION Patients undergoing repeat hepatectomy and those with primary tumour lymph node metastases are at significant risk of PLNM. Although PLNM is a poor prognostic factor independent of perihepatic lymph node station, patients with one or two PLNMs have a more favourable outcome than those with more PLNMs.
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Affiliation(s)
- M Okuno
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - C Goumard
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - T Mizuno
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - S Kopetz
- Department of Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - K Omichi
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - C-W D Tzeng
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Y S Chun
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - J E Lee
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - J-N Vauthey
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - C Conrad
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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14
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Okuno M, Ayabe T, Yokota I, Musha I, Shiga K, Kikuchi T, Kikuchi N, Ohtake A, Nakamura A, Nakabayashi K, Okamura K, Momozawa Y, Kubo M, Suzuki J, Urakami T, Kawamura T, Amemiya S, Ogata T, Sugihara S, Fukami M. Protein-altering variants of PTPN2 in childhood-onset Type 1A diabetes. Diabet Med 2018; 35:376-380. [PMID: 29247561 DOI: 10.1111/dme.13566] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 12/12/2017] [Indexed: 12/31/2022]
Abstract
AIM To examine the contribution of PTPN2 coding variants to the risk of childhood-onset Type 1A diabetes. METHODS PTPN2 mutation analysis was carried out for 169 unrelated Japanese people with childhood-onset Type 1A diabetes. We searched for coding variants that were absent or extremely rare in the general population and were scored as damaging by multiple in silico programs. We performed mRNA analysis and three-dimensional structural prediction of the detected variants, when possible. We also examined possible physical links between these variants and previously reported risk SNPs as well as clinical information from variant-positive children. RESULTS One frameshift variant (p.Q286Yfs*24) and two probably damaging missense substitutions (p.C232W and p.R350Q) were identified in one child each. Of these, p.Q286Yfs*24 and p.C232W were hitherto unreported, while p.R350Q accounted for 2/121,122 alleles of the exome datasets. The p.Q286Yfs*24 variant did not encode stable mRNA, and p.C232W appeared to affect the structure of the tyrosine-protein phosphatase domain. The three variants were physically unrelated to known risk SNPs. The variant-positive children manifested Type 1A diabetes without additional clinical features and invariably carried risk human leukocyte antigen alleles. CONCLUSIONS The results provide the first indication that PTPN2 variants contribute to the risk of Type 1A diabetes, independently of known risk SNPs. PTPN2 coding variants possibly induce non-specific Type 1A diabetes phenotypes in individuals with human leukocyte antigen-mediated disease susceptibility. Our findings warrant further validation.
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Affiliation(s)
- M Okuno
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo
- Department of Paediatrics and Child Health, Nihon University School of Medicine, Tokyo
| | - T Ayabe
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo
| | - I Yokota
- Department of Paediatrics, Division of Paediatric Endocrinology and Metabolism, Shikoku Medical Centre for Children and Adults, Kagawa
| | - I Musha
- Department of Paediatrics, Saitama Medical University, Faculty of Medicine, Saitama
| | - K Shiga
- Department of Paediatrics, Children's Medical Centre, Yokohama City University Medical Centre, Yokohama
| | - T Kikuchi
- Department of Paediatrics, Saitama Medical University, Faculty of Medicine, Saitama
| | - N Kikuchi
- Department of Paediatrics, Yokohama City Minato Red Cross Hospital, Yokohama
| | - A Ohtake
- Department of Paediatrics, Saitama Medical University, Faculty of Medicine, Saitama
| | - A Nakamura
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo
| | - K Nakabayashi
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo
| | - K Okamura
- Systems BioMedicine, National Research Institute for Child Health and Development, Tokyo
| | - Y Momozawa
- Laboratory for Genotyping Development, Riken Centre for Integrative Medical Sciences, Kanagawa
| | - M Kubo
- Laboratory for Genotyping Development, Riken Centre for Integrative Medical Sciences, Kanagawa
| | - J Suzuki
- Department of Paediatrics and Child Health, Nihon University School of Medicine, Tokyo
| | - T Urakami
- Department of Paediatrics and Child Health, Nihon University School of Medicine, Tokyo
| | - T Kawamura
- Department of Paediatrics, Osaka City University School of Medicine, Osaka
| | - S Amemiya
- Department of Paediatrics, Saitama Medical University, Faculty of Medicine, Saitama
| | - T Ogata
- Department of Paediatrics, Hamamatsu University School of Medicine, Hamamatsu
| | - S Sugihara
- Department of Paediatrics, Tokyo Women's Medical University Medical Centre East, Tokyo, Japan
| | - M Fukami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo
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Okuno M, Hatano E, Nishino H, Seo S, Taura K, Uemoto S. Does response rate of chemotherapy with molecular target agents correlate with the conversion rate and survival in patients with unresectable colorectal liver metastases?: A systematic review. Eur J Surg Oncol 2016; 43:1003-1012. [PMID: 27624917 DOI: 10.1016/j.ejso.2016.08.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 08/08/2016] [Accepted: 08/23/2016] [Indexed: 12/17/2022] Open
Abstract
PURPOSE This study aimed to evaluate whether the response rate of chemotherapy with molecular target agents correlates with the conversion rate, R0 resection rate, and survival in patients with initially unresectable colorectal liver metastases (CRLM). METHODS We reviewed the literature of prospective, controlled trials of systemic chemotherapy for patients with unresectable liver-only CRLM, including resectable extrahepatic metastases. Pearson's correlation coefficients were calculated. RESULTS A total of 26 patient groups from 18 studies were reviewed. The response rate was significantly correlated with the conversion rate (r = 0.66) and R0 resection rate (r = 0.43) in overall patients. In subgroup analysis, only the conversion rate in patients with chemotherapy only (r = 0.75) and anti-EGFR therapy (r = 0.78) were significantly strongly correlated with the response rate. A non-significant strong trend toward correlation between response and conversion rates was observed in patients with bevacizumab (r = 0.73, p = 0.10). The regression line in the scatter plot of patients using bevacizumab showed a less steep slope. This indicated that conversion rates were relatively less affected by response rates under anti-VEGF therapy compared with the other patient groups. The response rate in chemotherapy-only patients was significantly correlated with median progression-free survival (r = 0.61) and overall survival (r = 0.66). CONCLUSIONS Chemotherapy without molecular target agents and with anti-EGFR agents shows similar results of correlation between response and conversion/R0 resection rates. Under anti-VEGF therapy, conversion would be expected, even with a relatively lower response rate.
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Affiliation(s)
- M Okuno
- Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - E Hatano
- Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan; Hepato-Biliary-Pancreas Surgery, Department of Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan.
| | - H Nishino
- Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - S Seo
- Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - K Taura
- Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - S Uemoto
- Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
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Nishio T, Hatano E, Okuno M, Kasai Y, Seo S, Taura K, Yasuchika K, Mori A, Kaido T, Uemoto S. Clinical Characteristics of Patients with Non-B Non-C Hepatocellular Carcinoma Undergoing Hepatic Resection. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.643] [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: 11/28/2022]
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Urakami T, Okuno M, Yoshida A, Suzuki J, Mugisima H. Pharmacological therapies for children with type 2 diabetes mellitus should be individualized. Int J Pediatr Endocrinol 2013. [PMCID: PMC3850126 DOI: 10.1186/1687-9856-2013-s1-p32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Yokoyama Y, Matsumoto K, Watanabe E, Shigemi A, Umezaki Y, Takeshita A, Nakamura K, Okuno M, Ikawa K, Morikawa N, Takeda Y. P14 Pharmacokinetic and pharmacodynamic evaluation of sulbactam against Acinetobacter baumannii in a murine thigh infection model. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70259-0] [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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Saji H, Shiba K, Saiga A, Tokui T, Nakatsuka I, Okuno M, Yoshitake A, Yokoyama A. Survey on N-alkyl 2′-iodospiperone derivatives: Effect of lipophilicity and dopamine receptor binding affinity on in vivo biodistribution. J Labelled Comp Radiopharm 2011. [DOI: 10.1002/jlcr.2580260142] [Citation(s) in RCA: 4] [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: 11/10/2022]
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20
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Mori A, Ohashi N, Yoshida A, Nozaki M, Tatebe H, Okuno M, Hoshihara Y, Hongo M. Unsedated transnasal ultrathin esophagogastroduodenoscopy may provide better diagnostic performance in gastroesophageal reflux disease. Dis Esophagus 2011; 24:92-8. [PMID: 20659140 DOI: 10.1111/j.1442-2050.2010.01098.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [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: 02/06/2023]
Abstract
Transnasal ultrathin esophagogastroduodenoscopy (N-EGD) with less gagging reflexes under non-sedation is likely suitable for the diagnosis of gastroesophageal reflux disease (GERD), however, N-EGD might have drawbacks, including its low image resolution. Limited information is available regarding the diagnosability of N-EGD for GERD. We compared the utility and gagging reflexes of three different endoscopies, including N-EGD, ultrathin transoral EGD (UTO-EGD) and conventional oral EGD (CO-EGD), in the diagnosis of GERD. We performed screening endoscopy in 1580 patients (N-EGD n=727, UTO-EGD n=599, CO-EGD n=254) and compared the frequency distributions of the severity of reflux esophagitis, hiatus hernia, and Barrett's epithelium to estimate the diagnostic performance of each endoscopy. We also analyzed patients' tolerability of endoscopy by the subjective evaluation of gagging reflexes. In the diagnosis of reflux esophagitis and Barrett's epithelium, there was no significant difference in the frequency distributions of the severity of the diseases among three EGDs. However, the incidence of Barrett's epithelium was higher than that in the previous nationwide survey of GERD in Japan. The evaluated size of hiatus hernia was smaller in N-EGD than in two other peroral endoscopies. The size of hiatus hernia correlated significantly with severity of gagging reflexes that was also lowest when diagnosed with N-EGD. N-EGD had an equivalent performance in the diagnosis of reflux esophagitis and Barrett's epithelium compared with CO-EGD. Enlargement of hiatus hernia induced by gagging reflexes was minimal in N-EGD, resulting in its better performance in the diagnosis of Barrett's epithelium.
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Affiliation(s)
- A Mori
- Department of Gastroenterology, Ichinomiya Nishi Hospital, Aichi, Japan.
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Mori A, Tatebe H, Ohashi N, Maruyama T, Sakai K, Shibuya T, Okuno M. Balloon-assisted insertion of a cholangioscope into the common bile duct: a novel technique. Endoscopy 2008; 40 Suppl 2:E106-7. [PMID: 19085709 DOI: 10.1055/s-2007-995402] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- A Mori
- Department of Gastroenterology, Inuyama Chuo Hospital, Inuyama, Aichi, Japan.
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Mori A, Sakai K, Ohashi N, Maruyama T, Tatebe H, Shibuya T, Inoue H, Okuno M. Electrohydraulic lithotripsy of the common bile duct stone under transnasal direct cholangioscopy. Endoscopy 2008; 40 Suppl 2:E63. [PMID: 18633907 DOI: 10.1055/s-2007-995446] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- A Mori
- Department of Gastroenterology, Inuyama Chuo Hospital, Aichi, Japan.
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Affiliation(s)
- A Mori
- Department of Gastroenterology, Inuyama Chuo Hospital, Aichi, Japan.
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Ichikawa K, Nomura S, Ishii K, Okuno M, Kasai C, Maekawa T, Kadota E. Autologous stem cell transplantation for refractory Langerhans' cell histiocytosis. Bone Marrow Transplant 2007; 40:807-8. [PMID: 17704790 DOI: 10.1038/sj.bmt.1705822] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Takiguchi K, Okuno M, Takahashi H, Moriwaki O. Integrated photonic decoder with complementary code processing and balanced detection for two-dimensional optical code division multiple access. Opt Lett 2007; 32:784-6. [PMID: 17339936 DOI: 10.1364/ol.32.000784] [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: 05/14/2023]
Abstract
We propose a novel integrated photonic decoder for two-dimensional (time spreading, wavelength hopping) optical code division multiple access. The decoder is composed of multiplexers-demultiplexers, variable delay lines, and a coupler, which processes complementary codes and utilizes balanced detection to reduce unwanted cross-correlation interference. We successfully carried out a 10 Gbit/s transmission that demonstrated its effectiveness.
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Affiliation(s)
- K Takiguchi
- NTT Photonics Laboratories, NTT Corporation, Atsugi, Kanagawa, Japan.
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Mori A, Ohashi N, Maruyama T, Tatebe H, Sakai K, Inoue H, Takegoshi S, Okuno M. Endoscopic retrograde cholangiopancreatography through a gastric stoma using an ultrathin endoscope: a novel approach. Endoscopy 2007; 39 Suppl 1:E323. [PMID: 18273775 DOI: 10.1055/s-2007-966804] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- A Mori
- Department of Gastroenterology, Inuyama Chuo Hospital, Aichi, Japan.
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Morita M, Fujinoki M, Okuno M. K+-independent initiation of motility in chum salmon sperm treated with an organic alcohol, glycerol. ACTA ACUST UNITED AC 2006; 208:4549-56. [PMID: 16339873 DOI: 10.1242/jeb.01921] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 11/20/2022]
Abstract
Sperm of salmonid fishes are quiescent in the presence of millimolar concentrations of extracellular K+, but motility initiation occurs when sperm are suspended in K+-free medium. In this study, glycerol (CH2OHCHOHCH2OH) treatment of intact sperm in the presence of K+ induced the initiation of motility even though a large amount of K+ was present. Another organic alcohol, erythritol (CH2OH(CHOH)2CH2OH), had a similar effect, but ethylene glycol (CH2OHCH2OH) did not initiate sperm motility. Furthermore, this glycerol-treated sperm showed motility without subsequent addition of ATP and cAMP. CCCP, an uncoupler of the mitochondrial electron-transport chain involved in ATP synthesis, suppressed motility of glycerol-treated sperm, suggesting that ATP synthesis is required for dynein to slide microtubules in glycerol-treated sperm. The amount of intracellular cAMP ([cAMP]i) in glycerol-treated sperm did not increase on motility activation, but a protein kinase A (PKA) inhibitor, H-89, inhibited glycerol-treated sperm motility. In addition, phosphorylation of protein associated with motility initiation also occurred in glycerol-treated sperm, suggesting that the glycerol treatment induces activation of PKA without an increase in [cAMP]i. Taken together, it can be concluded that organic alcohol, glycerol and erythritol induce phosphorylation for motility initiation, bypassing the increase in [cAMP]i as a result of a decrease in extracellular K+ concentration.
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Affiliation(s)
- M Morita
- Department of Biology, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
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Kato H, Murakami H, Kawasumi M, Kunieda T, Okuno M, Kishimoto M, Soma M, Iwai D, Anzai M, Mitani T, Matsumoto K, Saeki K, Hosoi Y, Iritani A. 222 METHYLATION OF THE 52-UPSTREAM REGION OF THE H19 GENE IN MOUSE SOMATIC CELL, GAMETES, WILD TYPE AND ANDROGENETIC ES CELLS. Reprod Fertil Dev 2005. [DOI: 10.1071/rdv17n2ab222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
In mammals, several genes influenced by the phenomenon of genomic imprinting are critical during development. Recently, Kono et al. (2004 Nature 428, 860–864) reported the production of intact female mouse individuals that had only two haploid sets of maternal genome. They obtained these mice by combining a normal haploid maternal genome and a mutant haploid maternal genome with a 13 k base deletion in the H19 gene and its 5′-upstream region. This genomic combination resulted in the appropriate expression of the Igf2, H19, and other imprinted genes. In the mouse genome, there are four CTCF-binding sites in the 5′-upstream region of the H19 gene. The binding of CTCF to these binding sites regulates the expression of the Igf2 and H19 genes. The binding of CTCF to its binding sites is regulated by methylation of CpG sites in binding sites. In this study, as the first step to elucidate the role of the paternal genomic imprinting during development, we investigated the methylation of CpG sites in the 5′-upstream region of the H19 gene in mouse somatic cells, gametes, and two types of ES cells. Genomic DNA was isolated from BDF1 (C57BL/6N × DBA/2N) mouse's tail (male and female somatic tissue, mST and fST, respectively), spermatozoa (S), oocytes (O), and wild type and androgenetic embryonic stem cells (wtES and agES, respectively). The methylation of CpG sites was evaluated by using the bisulfite sequencing assay. There were 13 CpG sites and a CTCF-binding site in the region from −4413 to −3976 in the H19 gene relative to the transcription start site. The percentages of CpG sites in this region that were methylated were 88% (160/182), 79% (27/130), 93% (230/247), 8% (10/130), 77% (10/13) and 89% (314/351) for mST, fST, S, O, wtES, and agES, respectively. In the CTCF-binding site core motif (CCGCGTGGTGGCAG), the percentages of methylated CpG sites were 93% (26/28), 80% (16/20), 95% (36/38), 0% (0/20), 50% (1/2) and 96% (52/54) for mST, fST, S, O, wtES, and agES, respectively. The CpG sites in the sequence of agES were highly methylated similar to the finding in spermatozoa. However, an aberrant methylation pattern was observed in some clones of agES. From these results, it was concluded that the methylation of CpG sites in the genomic sequence of agES was well conserved and, therefore, agES is useful to elucidate the role of the paternal genomic imprinting during development.
This work was supported by Wakayama Prefecture Collaboration of Regional Entities for the Advanced of Technological Excellence, Japan, and by a Grant-in-Aid for the 21st Century COE Program of the Japan MEXT.
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Yoshimoto A, Matsushima Y, Sakaji I, Yoshikawa M, Nitta T, Okuno M, Ishida Y, Kasahara M, Suzuki T. Significance of Measurement for Colloid Osmotic Pressure during Hemodialysis. Hemodial Int 2004. [DOI: 10.1111/j.1492-7535.2004.0085aa.x] [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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Abstract
Euryhaline tilapia Oreochromis mossambicus acclimates to the external spawning environment by modulating its mechanism for regulating sperm motility. Adaptation of sperm was performed by acclimating fish in various environments. In this paper, regulatory mechanisms of freshwater-acclimated tilapia were studied in detail. Tilapia sperm motility was vigorous in hypotonic conditions and decreased with increasing osmolality. Sperm motility was reduced in hypotonic conditions when extracellular Ca(2+) was chelated; however, extracellular Ca(2+) was not a major factor for motility activation since sperm were motile even when extracellular Ca(2+) levels were nominally depleted by EGTA. The Ca(2+) indicator, fluo 3, showed that intracellular [Ca(2+)] increased on motility activation independently of extracellular [Ca(2+)], accompanied by swelling of the sperm neck region called the sleeve structure. Intracellular [Ca(2+)] was not increased under hypertonic conditions, in which sperm were immotile, even on addition of extracellular Ca(2+). It is possible that Ca(2+) is stored in the neck region. Demembranated sperm were reactivated in the presence of Ca(2+), but cAMP failed to reactivate the motility. Furthermore, we detected phosphorylation and dephosphorylation of three proteins at serine and threonine residues on motility activation. It is likely that hypotonic shock causes an increase in intracellular [Ca(2+)] that activates motility activation via phosphorylation of some flagellar proteins.
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Affiliation(s)
- M Morita
- Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan
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Shikinami Y, Okuno M. Bioresorbable devices made of forged composites of hydroxyapatite (HA) particles and poly L-lactide (PLLA). Part II: practical properties of miniscrews and miniplates. Biomaterials 2001; 22:3197-211. [PMID: 11603592 DOI: 10.1016/s0142-9612(01)00072-2] [Citation(s) in RCA: 161] [Impact Index Per Article: 7.0] [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: 10/27/2022]
Abstract
Miniscrews and miniplates made of forged composites composed of raw hydroxyapatite (u-HA) particles (particle size 0.2-20 microm, averaging 3.0 microm, Ca/p = 1.69 and containing CO3(2-)) and a poly L-lactide (PLLA, Mv: about 180 kDa, containing residual 0.05 wt% lactide) with osteological bioactivity such as direct bonding to bone and osteoconductivity, total resorbability and radiopacity were examined for various mechanical properties in order to evaluate their usefulness for cranio-, oral and maxillo-facial as well as plastic and reconstructive surgeries with PLLA-only or titanium devices. The composites containing u-HA particles at 30wt% for miniscrews and 40wt% for miniplates were selected based on total mechanical strengths and bioactivity, respectively. It was found that the composite devices generally had slightly different mechanical properties than forged PLLA-only devices of which strengths are ranked the highest among the reinforced PLLA-only ones that having been used in many clinical cases to date, in spite of their approximate 2 or 3 times lower absolute strengths than those of titanium ones. However, a remarkable distinction that makes the composite miniplates stand above the titanium ones was confirmed on their fatigue resistance to alternate bendings such that they retained 70% of their initial strength even after 60 times without revealing any damage, whereas the metallic devices fully broke off at only 8 times. This behavior was similar to that of forged PLLA-only devices but is unique as composites made of organic polymers divided by inorganic particles. In addition, profile plates such as L-, T-, X, T, C-, Mesh-, Box-, and Barhole types which were processed by forging twice exhibited nearly directional isotropy in strength and could be deformed in situ at ordinary temperatures to adjust their shapes along the surface undulations of the skull, mandible, maxilla, zygomatic bone and the like without thermoforming and did not return to their original shapes inside an alive body due to the high PLLA's Tg (65 degrees C) over an alive body temperature (37 degrees C). Since it had already been confirmed in previous papers that these stiff and tough composites have the osteological bioactivity which is missing from both PLLA-only and titanium ones, and radiopacity which is wanting in PLLA-only ones, these various small and thin screws and plates have conclusively less objectionable practicality for use in oral-maxillo and craniofacial as well as plastic and reconstructive surgeries.
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Suzui M, Sugie S, Mori H, Okuno M, Tanaka T, Moriwaki H. Different mutation status of the beta-catenin gene in carcinogen-induced colon, brain, and oral tumors in rats. Mol Carcinog 2001; 32:206-12. [PMID: 11746832 DOI: 10.1002/mc.10014] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 01/30/2023]
Abstract
Mutations in the region corresponding to the N-terminal phosphorylation sites (codons 1-51) of the rat beta-catenin gene (Ctnnb1) were investigated in rat colon tumors induced by 1-hydroxyanthraquinone (1-HA) plus methylazoxymethanol (MAM) acetate, by using polymerase chain reaction (PCR)-single-strand conformation polymorphism (SSCP) analysis. The beta-catenin gene was also screened for mutations in rat brain and oral tumors induced by ethyl nitrosourea (ENU) and 4-nitroquinoline 1-oxide (4-NQO), respectively. In colon tumors, beta-catenin gene mutations were found in two of three adenomas (67%) and 26 of 28 adenocarcinomas (93%), with a total incidence of 90% (28 of 31 adenomas plus adenocarcinomas). Eight (29%) were (34)G-->T (second position), eight (29%) were (32)G-->A (first position), five (18%) were (34)G-->A (first position), five (18%) were (41)C-->T (second position), one (4%) was (34)G-->A (second position), and one (4%) was (32)A-->G (second position), mutations, resulting in the substitutions of Gly(34)-->Val, Asp(32)-->Asn, Gly(34)-->Arg, Thr(41)-->Ile, Gly(34)-->Glu, and Asp(32)-->Gly, respectively. The (34)G-->T (second position) mutations found in this study were unique compared to those found in other carcinogen-induced rat colon carcinogenesis models. In contrast, beta-catenin gene mutations were not found in either the brain or oral tumors. These results suggest that mutations in the beta-catenin gene in rat tumors occur in specific tissues or organ sites and in a carcinogen-specific manner. Thus, the mutation spectrum in the beta-catenin gene is organ- and chemical carcinogen-specific.
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Affiliation(s)
- M Suzui
- Department of Internal Medicine, Gifu University School of Medicine, Gifu, Japan
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Abstract
Hepatocellular carcinoma (HCC) often develops in patients with chronic liver diseases associated with hepatitis B (HBV) and hepatitis C (HCV) virus infections with high incidences. Particularly, post-therapeutic recurrence encountered after the curative treatment of the preceding HCC may limit the prognosis. Thus, prevention of HCC is of great significance. In the present review, immunopreventions with alpha-interferon and glycyrrhizin, as well as chemoprevention with acyclic retinoid, are discussed. alpha-Interferon prevents the development of HCC not only in patients with a long-term elimination of HCV (sustained virological responders), but in ones with normalized serum aminotransferases (sustained biochemical responders). Glycyrrhizin also suppresses serum aminotransferases and thereby prevents the tumor development, even though the compound does not have antiviral activity for HBV or HCV by itself. Therefore, suppression of hepatic necroinflammation by these drugs may serve to prevent hepatocarcinogenesis. In contrast, acyclic retinoid suppresses the post-therapeutic recurrence in cirrhotic patients who underwent curative treatment of preceding tumors. The retinoid induces the disappearance of serum lectin-reactive alpha-fetoprotein (AFP-L3), a tumor marker indicating the presence of unrecognizable tumors in the remnant liver, suggesting a deletion of such minute (pre)malignant clones (clonal deletion). As a molecular mechanism of the clonal deletion, a novel mechanism of apoptosis induction by the retinoid via tissue transglutaminase is implicated. In future, a combination of immunopreventive and chemopreventive therapies may give a clue to the further advances of cancer prevention, and thereby to the improvement of the prognosis of cirrhotic patients.
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Affiliation(s)
- M Okuno
- First Department of Internal Medicine, Gifu University School of Medicine, Gifu, Japan.
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Matsushima-Nishiwaki R, Okuno M, Adachi S, Sano T, Akita K, Moriwaki H, Friedman SL, Kojima S. Phosphorylation of retinoid X receptor alpha at serine 260 impairs its metabolism and function in human hepatocellular carcinoma. Cancer Res 2001; 61:7675-82. [PMID: 11606411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Retinoids induce apoptosis and differentiation of hepatocellular carcinoma (HCC) cells and are used clinically in the chemoprevention of HCC. We have shown previously that hepatocarcinogenesis is accompanied by accumulation of full-length retinoid X receptor alpha (RXRalpha), although the underlying mechanisms and biological implications have remained unclear. The present studies were based on the finding that the accumulated full-length RXRalpha was phosphorylated at serine/threonine residues both in all human HCC tissues examined and in human HCC-derived HuH7 cells. Phosphorylation at serine 260 of RXRalpha, a consensus site of mitogen-activated protein kinase, was closely linked to its retarded degradation, low transactivating activity, and the promotion of cancer cell growth. There was no genomic mutation in the RXRalpha gene, and abrogation of phosphorylation by mitogen-activated protein kinase-specific inhibitors restored the degradation of RXRalpha in an RXR ligand-dependent manner. These results suggest that phosphorylation of RXRalpha may interfere with its metabolism and signaling in human HCC, which could lead to growth promotion of these tumors.
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Affiliation(s)
- R Matsushima-Nishiwaki
- First Department of Internal Medicine, Gifu University School of Medicine, Gifu 500-8705, Japan
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Okuno M. [Using centrifuge for gravitational biology in mammals]. Biol Sci Space 2001; 15:163-5. [PMID: 11997594 DOI: 10.2187/bss.15.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Udagawa A, Okuno M, Ogawa K. [Swimming behaviour and gravitational response of larva Heterobothrium okamotoi]. Biol Sci Space 2001; 15:320-1. [PMID: 11997662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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40
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Okuno M. [Gravitational environment and ciliary and flagellar movement]. Biol Sci Space 2001; 15:200-1. [PMID: 11997604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- M Okuno
- Grad. Sch. of Arts and Sciences, Univ. Tokyo, Komaba, Meguro-Ku, Tokyo
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41
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Yamashita M, Izumi-Kurotani A, Imamizo M, Koike H, Okuno M, Pfeiffer CJ, Komazaki S, Sasaki F, Ohira Y, Kashima I, Kikuyama S, Ohnishi T, Mogami Y, Asashima M. Japanese red-bellied newts in Space--AstroNewt experiment on Space Shuttle IML-2 and Space Flyer Unit. Biol Sci Space 2001; 15 Suppl:S96-103. [PMID: 11799253 DOI: 10.2187/bss.15.s96] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Biological effects of gravity was examined in embryonic development of Japanese red bellied newt. Two space newt missions were conducted in 1994 and 1995. The Second International Microgravity Laboratory was flown in 1994 as one of the SpaceLab missions. Space Flyer Unit, a Japanese space platform, was delivered to the earth orbit by the third launch of the H-II rocket and retrieved by Space Shuttle in 1996. Female newts were induced to lay eggs in orbit at these two space missions. Eggs were successfully obtained on both missions, and exposed to space environment from its early developmental stages. Morphology of the embryos was found not deviated from those developed on ground, as long as in the images taken in orbit or the examined specimen retrieved to ground. On the other hand, pathological changes were discovered in several organs of the adult newts that returned alive from their space flight.
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Affiliation(s)
- M Yamashita
- Institute of Space and Astronautical Science, Kanagawa, Japan.
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42
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Okuno M. [Geotaxis and ciliary movement in larva of Dicyemida]. Biol Sci Space 2001; 15:318-9. [PMID: 11997661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- M Okuno
- Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo
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43
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Okuno M, Sano T, Matsushima-Nishiwaki R, Adachi S, Akita K, Okano Y, Kojima S, Moriwaki H. Apoptosis induction by acyclic retinoid: a molecular basis of 'clonal deletion' therapy for hepatocellular carcinoma. Jpn J Clin Oncol 2001; 31:359-62. [PMID: 11574627 DOI: 10.1093/jjco/hye078] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We have shown previously that administration of acyclic retinoid to cirrhotic patients who had undergone curative treatment of preceding hepatocellular carcinoma (HCC) induced the disappearance of serum lectin-reactive alpha-fetoprotein (AFP-L3) and subsequently reduced the incidence of second liver cancers. AFP-L3 is a tumor marker that indicates the presence of occult tumors below the detection limit by diagnostic images. Therefore, we have proposed a new concept of 'clonal deletion' therapy with acyclic retinoid for the cancer chemoprevention against HCC. Such eradication of AFP-L3-producing latent malignant (or premalignant) cells from the liver suggested a new strategy to prevent HCC, which may be involved in the same category as cancer chemotherapy. In the present series of studies, we explored the molecular mechanism of 'clonal deletion' and found a novel mechanism of apoptosis induction by the retinoid. We have demonstrated a modification of a retinoid receptor, RXRalpha, by mitogen-activated protein (MAP) kinase-dependent phosphorylation, resulting in the loss of transactivating activity. This may lead HCC cells to be resistant to natural retinoic acid. However, acyclic retinoid restored the function of phosphorylated RXRalpha and induced its downstream pro-apoptotic genes including tissue transglutaminase, an enzyme that is implicated in apoptosis. Tissue transglutaminase-dependent apoptosis in HCC cells was independent of the activation of caspases. This novel mechanism of retinoid-induced apoptosis may give a clue to understand the molecular mechanism of clonal deletion.
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Affiliation(s)
- M Okuno
- First Department of Internal Medicine, Gifu University School of Medicine, Gifu, Japan
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44
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Shida Y, Nakagawa Y, Okuno M, Maeda S, Yonekawa Y. A comparison of vibration magnitudes on the tool with different subject according to the ISO 8662-7 standard. Ind Health 2001; 39:255-268. [PMID: 11500002 DOI: 10.2486/indhealth.39.255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Recently, ISO has defined the guidelines for the evaluation of the measurement and exposure limits of hand-transmitted vibrations at the handle of hand-held portable power tools. In a measurement of vibrations at pneumatic impact wrenches that tighten and remove screws. ISO 8862-7 standard: 1997 and ISO 5349 standard: 1986 are set as international standards. In order to make an exact measurement of the quantities of vibrations exposed to the hand-arm system of a human body, ISO 8662-7 gives specifications to a measurement device and a loading device. As to a measurement device, for instance, the mass, installation method etc. of transducers and mechanical filters are defined. In addition, it specifies with each tolerance the working conditions of a pneumatic tool, the number of revolutions of socket in a loading device, the feed force, the number of subjects, and such an evaluation method as how to decide a declaration value of vibrations. These specifications give toolmakers a comparative measurement of vibration values of their tools before shipment. Meanwhile, although the measurement condition described in ISO8662-7: 1997 is that skilled operators conduct vibration measurement, no provisions as to operators are made in detail. Hence, this study focuses its concern on ambiguous work experience years in measuring vibrations of the tools in conformity with ISO 8662-7, and hereby the effect of years of work experience upon measurement values is considered and at the same time a knowledge of how to select operators is made clear.
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Affiliation(s)
- Y Shida
- KUKEN Co., Ltd., Nonoue, Habikino-city, Osaka, Japan
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45
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Okuno M, Akita K, Moriwaki H, Kawada N, Ikeda K, Kaneda K, Suzuki Y, Kojima S. Prevention of rat hepatic fibrosis by the protease inhibitor, camostat mesilate, via reduced generation of active TGF-beta. Gastroenterology 2001; 120:1784-800. [PMID: 11375959 DOI: 10.1053/gast.2001.24832] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND & AIMS Proteolytic release and activation of latent transforming growth factor beta (TGF-beta) by the hepatic stellate cells (HSCs) are key events for pathogenesis of hepatic fibrosis, and protease inhibitors suppress TGF-beta generation by cultured HSCs, suggesting their potential use as antifibrogenic agents. We explored this idea using camostat mesilate, a serine protease inhibitor, to determine its effects and mechanisms of action in vivo. METHODS Camostat mesilate was either added to cultured rat HSCs or administered orally to rats during porcine serum treatment, followed by overexpression of urokinase. We measured cellular and hepatic levels of plasmin, TGF-beta, TGF-beta activity, activated HSC markers (increased cell number, morphologic change, and expression of both alpha-smooth muscle actin and collagen(alpha2)[I]), and fibrosis (Azan-staining and quantification of hydroxyproline content). RESULTS Camostat mesilate (500 micromol/L) inhibited generation of TGF-beta by suppressing plasmin activity and reduced the activity of TGF-beta, which blocked in vitro activation of HSCs. In the in vivo model, camostat mesilate (1-2 mg/g of diet) markedly attenuated an increase in hepatic plasmin and TGF-beta levels, HSC activation, and hepatic fibrosis without apparent systemic or local side effects, all of which were reverted by restoration of hepatic plasmin activity. CONCLUSIONS Camostat mesilate prevents porcine serum-induced rat hepatic fibrosis via a profound reduction in TGF-beta generation.
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Affiliation(s)
- M Okuno
- First Department of Internal Medicine, Gifu University School of Medicine, Gifu, RIKEN, Tsukuba, Japan
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Imamura A, Nakamoto H, Inoue T, Yamada H, Okuno M, Takai S, Komada H, Kwon AH, Kamiyama Y. Ruptured dissecting aneurysm in bilateral iliac arteries caused by Ehlers-Danlos syndrome type IV: report of a case. Surg Today 2001; 31:85-9. [PMID: 11213052 DOI: 10.1007/s005950170228] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Ehlers-Danlos syndrome (EDS) is an inherited disorder of connective tissue characterized by hyperextensible skin, hypermobile joints, and abnormalities of the cardiovascular system. Ten types and several subtypes of EDS have so far been recognized based on genetic, clinical, and biochemical characteristics. The spectrum of the disorder varies from mild to life-threatening vascular complications. EDS type IV is a particularly dangerous form with a lethal spontaneous rupture of the major arteries and aneurysmal formation. We present herein a case of a ruptured dissecting aneurysm in the bilateral iliac arteries caused by EDS type IV. A previously healthy 33-year-old man without any physical features of this connective tissue disorder experienced a metachronous vascular rupture two times. Successful synthetic bypass grafting was performed with great difficulty. The diagnosis of EDS type IV was made afterwards based on an electrophoresis analysis of a skin biopsy specimen which revealed a lack of type III collagen. Surgical intervention in cases of arterial complications in EDS type IV patients have been reported to be both difficult and frequently unsuccessful. The early clinical recognition of this syndrome is therefore of great importance due to the hazards of such surgical therapies.
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Affiliation(s)
- A Imamura
- First Department of Surgery, Kansai Medical University, Moriguchi, Osaka, Japan
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Abstract
We describe a Japanese girl with Bernard-Soulier syndrome and 22q11.2 microdeletion. She had viral infections and recurrent thrombocytopenia and hemorrhagic diathesis after cardiac surgery. As congenital heart defects and abnormal immunity are the most common clinical manifestations associated with 22q11.2 deletion, patients with this association may have a greater risk of developing a severe bleeding disorder.
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Affiliation(s)
- M Nakagawa
- Department of Pediatrics, Shiga University of Medical Science, Otsu, Japan.
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Abstract
The social and professional isolation of physicians remains an important issue in rural areas. However, few studies have investigated the involvement of geographic factors in the isolation. This study investigates rural public clinics in inland and remote island locations and attempts to objectively compare the isolation of these physicians. A mailed questionnaire was sent to rural clinics where graduate physicians from Jichi Medical School were working in 1994 and 1995. Among the 198 clinics with one or more full-time physicians, 185 (93 percent) responded to the inquiry. Geographic and demographic factors of the communities were compared between 43 clinics located in remote islands and the other 142 rural inland clinics. Rural clinics in remote islands have smaller subject populations, fewer part-time physicians, a longer journey to the nearest city, and a longer distance and travel time to the base hospital than rural inland clinics. Physicians in remote island clinics had less medical training and are more isolated than other physicians. More than half of the clinic physicians in remote islands have no regular training schedule, in contrast to less than a quarter of the inland clinic physicians. Almost all clinics (97.7%) in remote islands do not have a part-time physician, whereas about 20 percent of the rural inland clinics do. Physicians in remote island clinics are more socially and professionally isolated than those in inland clinics. Strategies to reduce these problems should be given priority in rural health policy and measures tailored to rural clinics in remote islands.
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Affiliation(s)
- K Inoue
- Department of Community and Family Medicine, Jichi Medical School, Japan
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Shimizu M, Hara A, Okuno M, Matsuno H, Okada K, Ueshima S, Matsuo O, Niwa M, Akita K, Yamada Y, Yoshimi N, Uematsu T, Kojima S, Friedman SL, Moriwaki H, Mori H. Mechanism of retarded liver regeneration in plasminogen activator-deficient mice: impaired activation of hepatocyte growth factor after Fas-mediated massive hepatic apoptosis. Hepatology 2001; 33:569-76. [PMID: 11230736 DOI: 10.1053/jhep.2001.22650] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.9] [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: 12/07/2022]
Abstract
Urokinase-type plasminogen activator (uPA) is implicated in the regulation of hepatic regeneration by activating hepatocyte growth factor (HGF). Here, we investigated its role in the hepatic regeneration after Fas-mediated massive hepatocyte death employing mice deficient in either uPA or its inhibitor, plasminogen activator inhibitor-1 (PAI-1). We measured kinetics of hepatic levels of proliferating cell nuclear antigen (PCNA)-labeling index, plasmin activity, mature HGF, and its phosphorylated receptor, c-Met. In the genetically targeted and wild-type mice, hepatocytes fell into the same extent of apoptosis 6 to 12 hours after an intraperitoneal injection with anti-Fas antibody, as judged from histologic analysis and a histon-DNA enzyme-linked immunosorbent assay (ELISA). In the wild-type mice, mature HGF emerged in the liver 6 hours following anti-Fas injection, and hepatic PCNA-labeling index started to increase following 24 hours and peaked at 48 hours. In the uPA(-/-) mice, emergence of mature HGF was delayed 12 hours and hepatic regeneration peaked at 96 hours. Supplementation with the uPA gene to the uPA(-/-) mice by in vivo lipofection restored hepatic plasmin levels, and improved a delay in the expression of both mature HGF and phosphorylated c-Met, accompanying a normal rate of liver regeneration. In contrast, PAI-1(-/-) mice showed accelerated liver regeneration; mature HGF emerged as early as 3 hours, and PCNA-labeling index increased at 24 hours. This accelerated regeneration was abolished by administration with anti-HGF antibody. These results strongly suggest a physiologic role of uPA in the proteolytic maturation of HGF, and thereby in hepatic regeneration after Fas-mediated massive hepatocyte death.
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Affiliation(s)
- M Shimizu
- Department of Pathology, Gifu University School of Medicine, Gifu, Japan.
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Asakawa H, Tsuji M, Tokumine Y, Kashihara T, Okuno M, Takenaka R, Kawakami F. Gastric T-cell lymphoma presenting with epithelioid granulomas mimicking tuberculosis in regional lymph nodes. J Gastroenterol 2001; 36:190-4. [PMID: 11291883 DOI: 10.1007/s005350170128] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In patients with malignant lymphomas, a sarcoid reaction is occasionally observed. However, lymphoma-related granulomas with caseous necrosis are rare. We describe such a case of T-cell gastric lymphoma that was difficult to diagnose. A 50-year-old man was referred to our hospital because of abnormal gastric endoscopic findings: hypertrophic folds with narrowing of the gastric lumen and multiple ulcers in the body. Gastric biopsy specimens showed non-specific inflammation. An open biopsy of the enlarged gastric regional lymph nodes was performed. The sections revealed effacement of the normal architecture and replacement by numerous epithelioid granulomas accompanied by Langhan's type giant cells with or without central caseous necrosis, strongly suggesting tuberculosis. However, mycobacteria and other causative organisms were not detected, and an anti-tuberculous regimen was ineffective. Repeat gastric biopsies were performed and, finally, atypical lymphocytes were observed infiltrating the mucosa. The patient was diagnosed with gastric T-cell lymphoma based on the results of immunohistochemical stainings. After chemotherapy, a total gastrectomy was performed. The diagnosis of gastric T-cell lymphoma with a sarcoid reaction was confirmed by histological findings of the sections. Namely, the gastric wall was replaced by atypical lymphocytes showing the phenotype of helper T cells, admixed with epithelioid granulomas with Langhan's type giant cells. Thus, this case suggests that regional lymph nodes in gastric lymphomas may be present as epithelioid granulomas with caseous necrosis, mimicking tuberculosis.
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MESH Headings
- Antitubercular Agents/therapeutic use
- Biopsy
- Chemotherapy, Adjuvant
- Combined Modality Therapy/methods
- Diagnosis, Differential
- Gastrectomy
- Giant Cells, Langhans
- Granuloma, Giant Cell/etiology
- Granuloma, Giant Cell/pathology
- Humans
- Lymphoma, T-Cell/complications
- Lymphoma, T-Cell/diagnosis
- Lymphoma, T-Cell/therapy
- Male
- Middle Aged
- Stomach Neoplasms/complications
- Stomach Neoplasms/diagnosis
- Stomach Neoplasms/therapy
- Tuberculosis, Lymph Node/diagnosis
- Tuberculosis, Lymph Node/drug therapy
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Affiliation(s)
- H Asakawa
- Department of Internal Medicine, Itami City Hospital, Itami, Japan
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