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Li HF, Naimi S, Sprouse TM, Mumpower MR, Abe Y, Yamaguchi Y, Nagae D, Suzaki F, Wakasugi M, Arakawa H, Dou WB, Hamakawa D, Hosoi S, Inada Y, Kajiki D, Kobayashi T, Sakaue M, Yokoda Y, Yamaguchi T, Kagesawa R, Kamioka D, Moriguchi T, Mukai M, Ozawa A, Ota S, Kitamura N, Masuoka S, Michimasa S, Baba H, Fukuda N, Shimizu Y, Suzuki H, Takeda H, Ahn DS, Wang M, Fu CY, Wang Q, Suzuki S, Ge Z, Litvinov YA, Lorusso G, Walker PM, Podolyak Z, Uesaka T. First Application of Mass Measurements with the Rare-RI Ring Reveals the Solar r-Process Abundance Trend at A=122 and A=123. Phys Rev Lett 2022; 128:152701. [PMID: 35499908 DOI: 10.1103/physrevlett.128.152701] [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] [Received: 12/09/2021] [Revised: 01/31/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
The Rare-RI Ring (R3) is a recently commissioned cyclotronlike storage ring mass spectrometer dedicated to mass measurements of exotic nuclei far from stability at Radioactive Isotope Beam Factory (RIBF) in RIKEN. The first application of mass measurement using the R3 mass spectrometer at RIBF is reported. Rare isotopes produced at RIBF-^{127}Sn, ^{126}In, ^{125}Cd, ^{124}Ag, ^{123}Pd-were injected in R3. Masses of ^{126}In, ^{125}Cd, and ^{123}Pd were measured whereby the mass uncertainty of ^{123}Pd was improved. This is the first reported measurement with a new storage ring mass spectrometry technique realized at a heavy-ion cyclotron and employing individual injection of the preidentified rare nuclei. The latter is essential for the future mass measurements of the rarest isotopes produced at RIBF. The impact of the new ^{123}Pd result on the solar r-process abundances in a neutron star merger event is investigated by performing reaction network calculations of 20 trajectories with varying electron fraction Y_{e}. It is found that the neutron capture cross section on ^{123}Pd increases by a factor of 2.2 and β-delayed neutron emission probability, P_{1 n}, of ^{123}Rh increases by 14%. The neutron capture cross section on ^{122}Pd decreases by a factor of 2.6 leading to pileup of material at A=122, thus reproducing the trend of the solar r-process abundances. The trend of the two-neutron separation energies (S_{2n}) was investigated for the Pd isotopic chain. The new mass measurement with improved uncertainty excludes large changes of the S_{2n} value at N=77. Such large increase of the S_{2n} values before N=82 was proposed as an alternative to the quenching of the N=82 shell gap to reproduce r-process abundances in the mass region of A=112-124.
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Affiliation(s)
- H F Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Lanzhou University, Lanzhou 730000, People's Republic of China
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S Naimi
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - T M Sprouse
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - M R Mumpower
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Y Abe
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Yamaguchi
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - D Nagae
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - F Suzaki
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - M Wakasugi
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Arakawa
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - W B Dou
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - D Hamakawa
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - S Hosoi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - Y Inada
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - D Kajiki
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - T Kobayashi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - M Sakaue
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - Y Yokoda
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - T Yamaguchi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - R Kagesawa
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - D Kamioka
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - T Moriguchi
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - M Mukai
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - A Ozawa
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - S Ota
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - N Kitamura
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - S Masuoka
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - S Michimasa
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - H Baba
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - N Fukuda
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Shimizu
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Suzuki
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Takeda
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - D S Ahn
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Center for Exotic Nuclear Studies, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - M Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - C Y Fu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Q Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - S Suzuki
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Z Ge
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - G Lorusso
- National Physical Laboratory, Teddington, TW11 0LW, United Kingdom
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P M Walker
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Zs Podolyak
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - T Uesaka
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
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Mawatari S, Kumagai K, Oda K, Tabu K, Ijuin S, Fujisaki K, Tashima S, Inada Y, Uto H, Saisyoji A, Hiramine Y, Hashiguchi M, Tamai T, Hori T, Taniyama O, Toyodome A, Sakae H, Kure T, Sakurai K, Moriuchi A, Kanmura S, Ido A. Features of patients who developed hepatocellular carcinoma after direct-acting antiviral treatment for hepatitis C Virus. PLoS One 2022; 17:e0262267. [PMID: 35020772 PMCID: PMC8754290 DOI: 10.1371/journal.pone.0262267] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 12/21/2021] [Indexed: 02/07/2023] Open
Abstract
Background The features of hepatitis C virus patients with a sustained virologic response (SVR) who developed hepatocellular carcinoma (HCC) after direct-acting antiviral (DAA) therapy are unclear. Methods The study population included 1494 DAA-SVR patients without a history of HCC. The cumulative carcinogenesis rate after the end of treatment (EOT) and factors related to HCC were analyzed. Results Sixty (4.0%) patients developed HCC during a median observation period of 47.6 months. At four years, the cumulative carcinogenesis rate was 4.7%. A Cox proportional hazards analysis showed that age ≥73 years (hazard ratio [HR]: 2.148), male sex (HR: 3.060), hyaluronic acid (HA) ≥75 ng/mL (HR: 3.996), alpha-fetoprotein at EOT (EOT-AFP) ≥5.3 ng/mL (HR: 4.773), and albumin at EOT (EOT-Alb) <3.9 g/dL (HR: 2.305) were associated with HCC development. Especially, EOT-AFP ≥5.3 ng/mL was associated with HCC development after 3 years from EOT (HR: 6.237). Among patients who developed HCC, AFP did not increase in patients with EOT-AFP <5.3 ng/mL at the onset of HCC. Of these 5 factors, EOT-AFP ≥5.3 ng/mL was scored as 2 points; the others were scored as 1 point. The 4-year cumulative carcinogenesis rate for patients with total scores of 0–2, 3–4, and 5–6 points were 0.6%, 11.9%, and 27.1%, respectively (p<0.001). Conclusions EOT-AFP ≥5.3 ng/mL is useful for predicting HCC development after an SVR. However, AFP does not increase in patients with EOT-AFP <5.3 ng/mL at the onset of HCC. The combination of EOT-AFP, age, sex, HA, and EOT-Alb is important for predicting carcinogenesis.
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Affiliation(s)
- Seiichi Mawatari
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- * E-mail:
| | - Kotaro Kumagai
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kohei Oda
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kazuaki Tabu
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Sho Ijuin
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kunio Fujisaki
- Department of Hepatology, Kirishima Medical Center, Hayato-cho, Kirishima, Kagoshima, Japan
| | - Shuzo Tashima
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Department of Hepatology, Kirishima Medical Center, Hayato-cho, Kirishima, Kagoshima, Japan
| | - Yukiko Inada
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Japan
| | - Hirofumi Uto
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Japan
| | - Akiko Saisyoji
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Yasunari Hiramine
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Masafumi Hashiguchi
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Japan
| | - Tsutomu Tamai
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Japan
| | - Takeshi Hori
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Japan
| | - Ohki Taniyama
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Ai Toyodome
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Haruka Sakae
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Takeshi Kure
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Department of Gastroenterology, Kagoshima Medical Association Hospital, Kagoshima, Japan
| | - Kazuhiro Sakurai
- Department of Gastroenterology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Akihiro Moriuchi
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Department of Gastroenterology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Shuji Kanmura
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Akio Ido
- Department of Human and Environmental Sciences, Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
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Shimomura K, Minatogawa H, Mashiko T, Arioka H, Iihara H, Sugawara M, Hida N, Akiyama K, Nawata S, Tsuboya A, Mishima K, Izawa N, Miyaji T, Honda K, Inada Y, Ohno Y, Katada C, Morita H, Yamaguchi T, Nakajima T. LBA63 Placebo-controlled, double-blinded phase Ⅲ study comparing dexamethasone on day 1 with dexamethasone on days 1 to 4, with combined neurokinin-1 receptor antagonist, palonosetron, and olanzapine in patients receiving cisplatin-containing highly emetogenic chemotherapy: SPARED trial. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.2144] [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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Inada Y, Nakamura T, Zaitsu M. Acute Transient Pancreatitis Associated With Milk Allergy in an Infant. Indian Pediatr 2020; 57:756. [PMID: 32844766] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- Yukiko Inada
- Department of Pediatrics, National Hospital Organization - Ureshino Medical Center, 4279-3 Shimojuku kou, Ureshino, Ureshino City, Saga 843-0393, Japan
| | - Takuji Nakamura
- Department of Pediatrics, National Hospital Organization - Ureshino Medical Center, 4279-3 Shimojuku kou, Ureshino, Ureshino City, Saga 843-0393, Japan
| | - Masafumi Zaitsu
- Department of Pediatrics, National Hospital Organization - Ureshino Medical Center, 4279-3 Shimojuku kou, Ureshino, Ureshino City, Saga 843-0393, Japan.
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Tabu K, Mawatari S, Oda K, Kumagai K, Inada Y, Uto H, Saisyoji A, Hiramine Y, Hashiguchi M, Tamai T, Hori T, Fujisaki K, Imanaka D, Kure T, Taniyama O, Toyodome A, Ijuin S, Sakae H, Sakurai K, Moriuchi A, Kanmura S, Ido A. Hypovascular tumors developed into hepatocellular carcinoma at a high rate despite the elimination of hepatitis C virus by direct-acting antivirals. PLoS One 2020; 15:e0237475. [PMID: 32790728 PMCID: PMC7425876 DOI: 10.1371/journal.pone.0237475] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/27/2020] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND AND AIMS Direct-acting antivirals (DAAs) against hepatitis C virus (HCV) exert high anti-HCV activity and are expected to show anti-inflammatory effects associated with HCV elimination. Furthermore, hepatocellular carcinoma (HCC) is known to dedifferentiate from hypovascular tumors, such as dysplastic nodules or well-differentiated HCC, to hypervascular tumors. We therefore explored whether or not DAAs can suppress the growth and hypervascularization of hypovascular tumors. METHODS We enrolled 481 patients with HCV genotype 1 infection who were treated with Daclatasvir and Asunaprevir therapy. Of these, 29 patients had 33 hypovascular tumors, which were confirmed by contrast-enhanced MRI or CT before therapy. We prospectively analyzed the cumulative incidence of HCC, i.e. the growth or hypervascularization of hypovascular tumors, and compared the HCC development rates between patients with hypovascular tumors and those without any tumors. RESULTS The mean size of the hypovascular tumors was 11.3 mm. Twenty seven of 29 patients who achieved an SVR had 31 nodules, 19 of 31 nodules (61.3%) showed tumor growth or hypervascularization, and 12 (38.7%) nodules showed no change or improvement. The cumulative incidence rates of tumor growth or hypervascularization were 19.4% at 1 year, 36.0% at 2 years, 56.6% at 3 years, and 65.3% at 4 years. Among the patients who achieved a sustained virologic response, the cumulative HCC development rates of patients with hypovascular tumors was significantly higher than in those without any tumors. A Cox proportional hazard analysis showed that a history of HCC therapy, the presence of a hypovascular tumor, and AFP >4.6 ng/mL at the end of treatment were independent risk factors for HCC development. CONCLUSION Hypovascular tumors developed into HCC at a high rate despite the elimination of HCV by DAAs. As patients with hypovascular tumors were shown to have a high risk of HCC development, they should undergo strict HCC surveillance.
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Affiliation(s)
- Kazuaki Tabu
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Seiichi Mawatari
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
- * E-mail:
| | - Kohei Oda
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Kotaro Kumagai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Yukiko Inada
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Miyazaki, Japan
| | - Hirofumi Uto
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Miyazaki, Japan
| | - Akiko Saisyoji
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Kagoshima, Japan
| | - Yasunari Hiramine
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Kagoshima, Japan
| | - Masafumi Hashiguchi
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Kagoshima, Japan
| | - Tsutomu Tamai
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Kagoshima, Japan
| | - Takeshi Hori
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Kagoshima, Japan
| | - Kunio Fujisaki
- Department of Hepatology, Kirishima Medical Center, Kirishima, Kagoshima, Japan
| | - Dai Imanaka
- Department of Gastroenterology, Ikeda Hospital, Kanoya, Kagoshima, Japan
| | - Takeshi Kure
- Department of Gastroenterology, Kagoshima City Medical Association Hospital, Kagoshima, Kagoshima, Japan
| | - Ohki Taniyama
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Ai Toyodome
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Sho Ijuin
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Haruka Sakae
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Kazuhiro Sakurai
- Department of Gastroenterology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Kagoshima, Japan
| | - Akihiro Moriuchi
- Department of Gastroenterology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Kagoshima, Japan
| | - Shuji Kanmura
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Akio Ido
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
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6
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Mawatari S, Oda K, Kumagai K, Tabu K, Ijuin S, Fujisaki K, Inada Y, Uto H, Saisyoji A, Hiramine Y, Hori T, Taniyama O, Toyodome A, Sakae H, Hashiguchi M, Kure T, Sakurai K, Tamai T, Moriuchi A, Ido A. Viral and host factors are associated with retreatment failure in hepatitis C patients receiving all-oral direct antiviral therapy. Hepatol Res 2020; 50:453-465. [PMID: 31846553 DOI: 10.1111/hepr.13474] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/25/2019] [Accepted: 12/13/2019] [Indexed: 12/17/2022]
Abstract
AIM Direct-acting antiviral (DAA) therapy for hepatitis C virus is associated with high sustained virologic response rates. However, patients for whom DAA therapy fails acquire resistance-associated substitutions (RASs). We therefore evaluated the efficacy of DAA retreatment and factors associated with retreatment failure. METHODS Non-structural 5A RASs were investigated at the start of DAA therapy and at treatment failure in 64 patients with hepatitis C virus genotype 1b for whom DAA combination therapy had failed. A total of 59 patients were introduced to DAA retreatment. The factors associated with retreatment failure were investigated. RESULTS A total of 20 of 43 (46.5%) daclatasvir + asunaprevir-treated patients with virologic failure had no RASs at baseline, and three (15%) acquired P32 deletion RASs. Four of seven sofosbuvir/ledipasvir-treated patients with virologic failure had more than two RASs of NS5A at baseline. The sustained virologic response rates on retreatment were as follows: sofosbuvir/ledipasvir, 81.8%; with elbasvir + grazoprevir, 0%; and glecaprevir/pibrentasvir, 87.5%. Patients for whom sofosbuvir/ledipasvir or elbasvir + grazoprevir failed achieved sustained virologic response with glecaprevir/pibrentasvir. Two of three patients for whom glecaprevir/pibrentasvir retreatment failed had Q24/L28/R30 and A92K RASs; the other had P32 deletion RAS at baseline. Interestingly, 10 of 11 patients with retreatment failure had the interleukin (IL)-28B single-nucleotide polymorphism (SNP) minor allele. A multivariate analysis showed that the IL28B SNP minor allele (P = 0.005, odds ratio 28.291) was an independent risk factor for retreatment failure. CONCLUSIONS In addition to viral factors (e.g. Q24, L28, R30, and A92 or P32 deletion RASs), host factors (e.g. IL28B SNP) are associated with DAA retreatment failure.
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Affiliation(s)
- Seiichi Mawatari
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kohei Oda
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kotaro Kumagai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kazuaki Tabu
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Sho Ijuin
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kunio Fujisaki
- Department of Hepatology, Kirishima Medical Center, Kagoshima, Japan
| | - Yukiko Inada
- Center for Digestive and Liver Diseases,, Miyazaki Medical Center Hospital, Miyazaki, Japan
| | - Hirofumi Uto
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.,Center for Digestive and Liver Diseases,, Miyazaki Medical Center Hospital, Miyazaki, Japan
| | - Akiko Saisyoji
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.,Department of Hepatology, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Yasunari Hiramine
- Department of Hepatology, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Takeshi Hori
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Japan
| | - Ohki Taniyama
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Ai Toyodome
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Haruka Sakae
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Masafumi Hashiguchi
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.,Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Japan
| | - Takeshi Kure
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.,Department of Gastroenterology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Kazuhiro Sakurai
- Department of Gastroenterology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Tsutomu Tamai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.,Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Kagoshima, Japan
| | - Akihiro Moriuchi
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.,Department of Gastroenterology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Akio Ido
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
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7
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Hiramine Y, Uto H, Mawatari S, Kanmura S, Imamura Y, Hiwaki T, Saishoji A, Yada T, Inada Y, Sakamoto H, Higashi H, Kubozono O, Maenohara S, Ido A. Effect of tolvaptan on the prognosis of patients with hepatic ascites. Hepatol Res 2019; 49:765-777. [PMID: 30916842 DOI: 10.1111/hepr.13337] [Citation(s) in RCA: 13] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 03/12/2019] [Accepted: 03/16/2019] [Indexed: 12/12/2022]
Abstract
AIM Despite accumulating evidence concerning the efficacy of tolvaptan in the treatment of body fluid retention or hyponatremia, the effect of tolvaptan on the prognosis of patients with hepatic ascites has not been fully investigated. METHODS A total of 628 patients with hepatic ascites who were treated with diuretics (furosemide, spironolactone, or tolvaptan) between 2007 and 2017 were enrolled and divided into two groups: those who received tolvaptan (original tolvaptan group, n = 278) and those who did not (original control group, n = 350). The cumulative survival rates between the groups were compared and the factors associated with survival in patients with hepatic ascites were identified using a Cox regression analysis. In addition, propensity score matching was applied in patients who started conventional diuretics for new-onset hepatic ascites after September 2013 (pre-matching tolvaptan group, n = 177; pre-matching control group, n = 63), and the cumulative survival rates were compared between the post-matching tolvaptan and control groups. RESULTS The survival rate was significantly higher in the tolvaptan group than the control group (P = 0.005), and tolvaptan therapy was identified as an independent factor associated with survival (hazard ratio 0.721 for death relative to control, P < 0.001). The propensity score-matched comparison also showed a significantly higher survival rate in the tolvaptan group (n = 51) than in the control group (n = 51) (P = 0.009). CONCLUSIONS This study suggests that tolvaptan might improve the prognosis of patients with hepatic ascites.
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Affiliation(s)
- Yasunari Hiramine
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Hirofumi Uto
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Japan.,Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Seiichi Mawatari
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Shuji Kanmura
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Yasushi Imamura
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Takuya Hiwaki
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Akiko Saishoji
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Japan.,Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Takazumi Yada
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Japan
| | - Yukiko Inada
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Japan
| | - Hidemori Sakamoto
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Miyazaki, Japan
| | - Hirofumi Higashi
- Department of Hygiene and Public Health, National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan
| | - Osamu Kubozono
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Shigeho Maenohara
- Department of Surgery, Kagoshima Kouseiren Hospital, Kagoshima, Japan
| | - Akio Ido
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
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8
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Inada Y, Kamiya T, Nagai H, Matsuoka S, Kumada A, Ikeda H, Hidaka K. Talbot interferometry for imaging two-dimensional electron density distribution over discharge plasma with higher sensitivity. Rev Sci Instrum 2018; 89:123112. [PMID: 30599556 DOI: 10.1063/1.5049199] [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] [Received: 07/20/2018] [Accepted: 11/28/2018] [Indexed: 06/09/2023]
Abstract
The basic properties of a Talbot interferometer implementing pinhole arrays were experimentally and numerically investigated for the improvement of measurement sensitivity of laser wavefront sensors utilized for electron density imaging over discharge plasmas. A numerical simulation using a plane wave decomposition method indicated that the pinhole arrays with a pitch of 300 μm and a pinhole diameter of 150 μm were most suitable for the measurement of the millimetre-scale discharge plasmas, in consideration of the spatial resolution and measurement accuracy. The plane wave decomposition simulation expected that the measurement sensitivity of the 8th-Talbot-length interferometer could be improved by a factor of 4 compared with the previously developed Shack-Hartmann type laser wavefront sensors, which was experimentally verified by the self-image behavior of the pinhole arrays. The Talbot interferometric system was successfully used for electron density imaging over the vacuum arcs generated between a 3-mm gap. The electron density image observed by the Talbot interferometers was in excellent agreement with that visualized by the previously developed Shack-Hartmann sensors. The practical notification for the pinhole array fabrication was also presented.
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Affiliation(s)
- Y Inada
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - T Kamiya
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - H Nagai
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - S Matsuoka
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - A Kumada
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - H Ikeda
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - K Hidaka
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
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9
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Matsushima A, Shioya K, Kobayashi M, Kodera Y, Inada Y. Activation of Blood Coagulation Syetem with the Protease from Dermatophagoides Farinae. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1651653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- A Matsushima
- Department of Materials Science and Technology, Toin University of Yokohama, 1614 Kuroganecho, Midoriku, Yokohama 225, Japan
| | - K Shioya
- Department of Materials Science and Technology, Toin University of Yokohama, 1614 Kuroganecho, Midoriku, Yokohama 225, Japan
| | - M Kobayashi
- Department of Materials Science and Technology, Toin University of Yokohama, 1614 Kuroganecho, Midoriku, Yokohama 225, Japan
| | - Y Kodera
- Department of Materials Science and Technology, Toin University of Yokohama, 1614 Kuroganecho, Midoriku, Yokohama 225, Japan
| | - Y Inada
- Department of Materials Science and Technology, Toin University of Yokohama, 1614 Kuroganecho, Midoriku, Yokohama 225, Japan
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10
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Mawatari S, Oda K, Tabu K, Ijuin S, Kumagai K, Fujisaki K, Hashiguchi M, Inada Y, Uto H, Hiramine Y, Kure T, Hori T, Taniyama O, Kasai A, Tamai T, Moriuchi A, Ido A. The co-existence of NS5A and NS5B resistance-associated substitutions is associated with virologic failure in Hepatitis C Virus genotype 1 patients treated with sofosbuvir and ledipasvir. PLoS One 2018; 13:e0198642. [PMID: 29856885 PMCID: PMC5983500 DOI: 10.1371/journal.pone.0198642] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 05/22/2018] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE The present study aimed to reveal the factors associated with virologic failure in sofosbuvir and ledipasvir (SOF/LDV)-treated patients, and identify baseline NS5A or NS5B resistance-associated substitutions (RASs). METHODS Four hundred ninety-three patients with Hepatitis C Virus (HCV) genotype 1b infection were treated with SOF/LDV; 31 had a history of interferon (IFN)-free treatment with daclatasvir and asunaprevir. The effect of baseline RASs on the response to SOF/LDV therapy was analyzed. RESULTS Overall, a sustained virologic response at 12 weeks (SVR12) was achieved in 476 patients (96.6%). The SVR12 rates in the patients with IFN-free treatment-naïve and retreatment were 97.6% and 80.6%, respectively. HCV elimination was not achieved in 17 patients, 11 (including 5 with IFN-free retreatment) of whom had virologic failure. Eight patients had coexisting NS5A RASs of Q24, L28 and/or R30, L31, or Y93 and one patient had coexisting NS5A RASs of P32L and A92K. Interestingly, 10 and 8 patients had NS5B A218S and C316N RAS respectively. According to a multivariate analysis, coexisting NS5A RASs, NS5A P32 RAS, NS5B A218 and/or C316 RASs, and γ-glutamyltranspeptidase were associated with virologic failure. In the naïve patients, all patients without NS5B A218 and/or C316 RAS achieved an SVR12. Notably, the SVR12 rates of patients with coexisting NS5A and NS5B RASs were significantly lower (83.3%). CONCLUSIONS Although SOF/LDV therapy resulted in a high SVR12 rate, coexisting NS5A and NS5B RASs were associated with virologic failure. These results might indicate that the coexisting baseline RASs influence the therapeutic effects of SOF/LDV.
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Affiliation(s)
- Seiichi Mawatari
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
| | - Kohei Oda
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
- Department of HGF Tissue Repair and Regenerative Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
| | - Kazuaki Tabu
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
| | - Sho Ijuin
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
| | - Kotaro Kumagai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Uearata-cho Kagoshima, Japan
| | - Kunio Fujisaki
- Department of Hepatology, Kirishima Medical Center, Kirishima, Hayato-cho, Kirishima, Kagoshima, Japan
| | - Masafumi Hashiguchi
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
- Department of Hepatology, Kirishima Medical Center, Kirishima, Hayato-cho, Kirishima, Kagoshima, Japan
| | - Yukiko Inada
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Takamatsu-cho, Miyazaki, Japan
| | - Hirofumi Uto
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, Takamatsu-cho, Miyazaki, Japan
| | - Yasunari Hiramine
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Tenpozan-cho, Kagoshima, Japan
| | - Takeshi Kure
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, Tenpozan-cho, Kagoshima, Japan
| | - Takeshi Hori
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Uearata-cho Kagoshima, Japan
| | - Oki Taniyama
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, Uearata-cho Kagoshima, Japan
| | - Ai Kasai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
| | - Tsutomu Tamai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
| | - Akihiro Moriuchi
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
| | - Akio Ido
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences,Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
- Department of HGF Tissue Repair and Regenerative Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan
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11
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Mawatari S, Oda K, Tabu K, Ijuin S, Kumagai K, Inada Y, Uto H, Hiramine Y, Kure T, Fujisaki K, Hashiguchi M, Hori T, Oshige A, Imanaka D, Saishoji A, Taniyama O, Sakae H, Tamai T, Moriuchi A, Ido A. New resistance-associated substitutions and failure of dual oral therapy with daclatasvir and asunaprevir. J Gastroenterol 2017; 52:855-867. [PMID: 28078469 DOI: 10.1007/s00535-016-1303-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 11/22/2016] [Indexed: 02/04/2023]
Abstract
BACKGROUND Daclatasvir (DCV) and asunaprevir (ASV) combination therapy has been primarily used in patients without NS5A L31 or Y93 resistance-associated substitutions (RASs) before treatment. We examined the characteristics of patients without these baseline RASs who did not achieve hepatitis C virus eradication with DCV and ASV combination therapy and identified new baseline NS5A RASs that are closely associated with failure of combination therapy. METHODS Three hundred thirty-five patients with hepatitis C virus genotype 1 infection with no NS5A L31, NS5A Y93, and NS3 D168 RASs before DCV and ASV combination therapy and no history of protease inhibitor therapy were enrolled. All RASs were evaluated by direct sequencing. RESULTS Sustained virologic response at 12 weeks (SVR12) was achieved in 297 patients (89%). Patients with NS5A Q24, L28, and/or R30 RASs or concomitant NS5A F37 and Q54 RASs had a significantly lower SVR12 rate than patients without these RASs (70% vs 92%, p < 0.001 and 79% vs 92%, p = 0.002 respectively). Multivariate analysis showed that NS5A Q24, L28, and/or R30 RASs and concomitant NS5A F37 and Q54 RASs were significantly associated with virologic failure. The SVR12 rate in patients without NS5A Q24, L28, and/or R30 RASs and concomitant NS5A F37 and Q54 RASs was 96.2% (202/210). CONCLUSIONS In patients without NS5A L31 or Y93 RASs, the presence of NS5A Q24, L28, and/or R30 RASs and concomitant NS5A F37 and Q54 RASs at the baseline was associated with failure of DCV and ASV combination therapy. The coexistence of baseline RASs other than NS5A L31 and Y93 may affect the therapeutic effectiveness of DCV and ASV combination therapy.
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Affiliation(s)
- Seiichi Mawatari
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.
| | - Kohei Oda
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Kazuaki Tabu
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Sho Ijuin
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Kotaro Kumagai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Yukiko Inada
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, 2-16 Takamatsu-cho, Miyazaki, 880-0003, Japan
| | - Hirofumi Uto
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.,Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, 2-16 Takamatsu-cho, Miyazaki, 880-0003, Japan
| | - Yasunari Hiramine
- Department of Internal Medicine, Kagoshima Kouseiren Hospital, 22-25 Tenpozan-cho, Kagoshima, 890-0061, Japan
| | - Takeshi Kure
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.,Department of Internal Medicine, Kagoshima Kouseiren Hospital, 22-25 Tenpozan-cho, Kagoshima, 890-0061, Japan
| | - Kunio Fujisaki
- Department of Hepatology, Kirishima Medical Center, 3320 Hayato-cho, Kirishima, Kagoshima, 899-5112, Japan
| | - Masafumi Hashiguchi
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.,Department of Hepatology, Kirishima Medical Center, 3320 Hayato-cho, Kirishima, Kagoshima, 899-5112, Japan
| | - Takeshi Hori
- Department of Gastroenterology and Hepatology, Kagoshima City Hospital, 37-1 Uearata-cho, Kagoshima, 890-8760, Japan
| | - Akihiko Oshige
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.,Department of Gastroenterology and Hepatology, Kagoshima City Hospital, 37-1 Uearata-cho, Kagoshima, 890-8760, Japan
| | - Dai Imanaka
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.,Department of Gastroenteroloby, Ikeda Hospital, 1830 Shimoharaigawa-cho, Kanoya, Kagoshima, 893-0024, Japan
| | - Akiko Saishoji
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.,Department of Hepatology, Kagoshima Teishin Hospital, 1-12-1 Shimoishiki, Kagoshima, 890-8798, Japan
| | - Oki Taniyama
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Haruka Sakae
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Tsutomu Tamai
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Akihiro Moriuchi
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Akio Ido
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
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12
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Toyota J, Karino Y, Suzuki F, Ikeda F, Ido A, Tanaka K, Takaguchi K, Naganuma A, Tomita E, Chayama K, Fujiyama S, Inada Y, Yoshiji H, Watanabe H, Ishikawa H, Hu W, McPhee F, Linaberry M, Yin PD, Swenson ES, Kumada H. Daclatasvir/asunaprevir/beclabuvir fixed-dose combination in Japanese patients with HCV genotype 1 infection. J Gastroenterol 2017; 52:385-395. [PMID: 27502287 DOI: 10.1007/s00535-016-1245-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [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] [Received: 04/13/2016] [Accepted: 07/16/2016] [Indexed: 02/04/2023]
Abstract
BACKGROUND DCV-TRIO, a fixed-dose combination of daclatasvir (pangenotypic NS5A inhibitor), asunaprevir (NS3/4A protease inhibitor), and beclabuvir (non-nucleoside NS5B inhibitor), has achieved high rates of sustained virologic response at post-treatment Week 12 (SVR12) in phase 3 studies. METHODS In this phase 3 study, DCV-TRIO for 12 weeks and daclatasvir plus asunaprevir (DUAL) for 24 weeks were studied in Japanese patients infected with HCV genotype 1 (99 % genotype 1b). RESULTS SVR12 rates ≥95 % were achieved in both treatment-naive (N = 152) and interferon-experienced (N = 65) cohorts treated with DCV-TRIO for 12 weeks and were comparable across patient subgroups, including patients aged ≥65 years and those with cirrhosis. DUAL recipients (N = 75) had an SVR12 rate of 87 %. In the absence of baseline resistance-associated polymorphisms at positions NS5A-Y93H or -L31, SVR12 rates were 98 % with DCV-TRIO or DUAL. Among genotype 1b-infected patients with baseline Y93H or L31 polymorphisms, 35/38 (92 %) DCV-TRIO recipients, and 7/16 (44 %) DUAL recipients achieved SVR12. Adverse events, mostly liver related, led to treatment discontinuation in 10 % of DCV-TRIO recipients. In this group, SVR12 was achieved by 3/9 patients who discontinued before Week 4 and by 12/12 patients who completed ≥4 weeks of DCV-TRIO. Treatment-related serious adverse events occurred in 4 and 3 % of DCV-TRIO and DUAL recipients, respectively. Seven patients (9 %) discontinued DUAL due to adverse events. No deaths occurred. CONCLUSION SVR12 was achieved by 96 % of Japanese patients with HCV genotype 1 infection after 12 weeks of treatment with the DCV-TRIO regimen. DCV-TRIO and DUAL exhibited comparable safety profiles.
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Affiliation(s)
- Joji Toyota
- Department of Gastroenterology, Sapporo-Kosei General Hospital, 8-5 Higashi Kita-3-jo Chuo-ku, Sapporo-shi, Hokkaido, Japan.
| | - Yoshiyasu Karino
- Department of Gastroenterology, Sapporo-Kosei General Hospital, 8-5 Higashi Kita-3-jo Chuo-ku, Sapporo-shi, Hokkaido, Japan
| | - Fumitaka Suzuki
- Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, Japan
| | - Fusao Ikeda
- Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama, Japan
| | - Akio Ido
- Kagoshima University, 8-35-1 Sakuragoka, Kagoshima-shi, Kagoshima, Japan
| | - Katsuaki Tanaka
- Yokohama City University Medical Center, 4-57 Urafune-cho, Minami-ku, Yokohama, Kanagawa, Japan
| | - Koichi Takaguchi
- Kagawa Prefectural Central Hospital, 1-2-1 Asahimachi, Takamatsu-shi, Kagawa, Japan
| | - Atsushi Naganuma
- Takasaki General Medical Center, 36 Takamatsu-cho, Takasaki-shi, Gunma, Japan
| | - Eiichi Tomita
- Gifu Municipal Hospital, 7-1 Kashima-cho, Gifu-shi, Gifu, Japan
| | - Kazuaki Chayama
- Hiroshima University, 1-2-3 Kasumi, Minami-Ku, Hiroshima-shi, Hiroshima, Japan
| | - Shigetoshi Fujiyama
- Kumamoto Shinto General Hospital, 1-17-27 Shinyashiki, Chuo-ku, Kumamoto, Kumamoto, Japan
| | - Yukiko Inada
- Miyazaki Medical Center Hospital, 2-16 Takamatsu-cho, Miyazaki-shi, Miyazaki, Japan
| | - Hitoshi Yoshiji
- Nara Medical University, 840 Shijocho, Kashihara-shi, Nara, Japan
| | - Hideaki Watanabe
- Bristol-Myers Squibb K.K., 5-1 Nishi-Shinjuku 6-chome, Shinjuku-ku, Tokyo, Japan
| | - Hiroki Ishikawa
- Bristol-Myers Squibb K.K., 5-1 Nishi-Shinjuku 6-chome, Shinjuku-ku, Tokyo, Japan
| | - Wenhua Hu
- Bristol-Myers Squibb, 5 Research Parkway, Wallingford, CT, USA
| | - Fiona McPhee
- Bristol-Myers Squibb, 5 Research Parkway, Wallingford, CT, USA
| | - Misti Linaberry
- Bristol-Myers Squibb, 100 Nassau Park Blvd, Princeton, NJ, USA
| | - Philip D Yin
- Bristol-Myers Squibb, 5 Research Parkway, Wallingford, CT, USA
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Foster GR, Chayama K, Chuang WL, Fainboim H, Farkkila M, Gadano A, Gaeta GB, Hézode C, Inada Y, Heo J, Kumada H, Lu SN, Marcellin P, Moreno C, Roberts SK, Strasser SI, Thompson AJ, Toyota J, Paik SW, Vierling JM, Zignego AL, Cohen D, McPhee F, Wind-Rotolo M, Srinivasan S, Hruska M, Myler H, Portsmouth SD. A randomized, controlled study of peginterferon lambda-1a/ribavirin ± daclatasvir for hepatitis C virus genotype 2 or 3. Springerplus 2016; 5:1365. [PMID: 27588258 PMCID: PMC4990525 DOI: 10.1186/s40064-016-2920-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 07/27/2016] [Indexed: 12/15/2022]
Abstract
Background and purpose
Peginterferon Lambda was being developed as an alternative to alfa interferon for the treatment of chronic hepatitis C virus (HCV) infection. We compared peginterferon Lambda-1a plus ribavirin (Lambda/RBV) and Lambda/RBV plus daclatasvir (DCV; pangenotypic NS5A inhibitor) with peginterferon alfa-2a plus RBV (alfa/RBV) in treatment-naive patients with HCV genotype 2 or 3 infection. Methods
In this multicenter, double-blind, phase 3 randomized controlled trial, patients were assigned 2:2:1 to receive 24 weeks of Lambda/RBV, 12 weeks of Lambda/RBV + DCV, or 24 weeks of alfa/RBV. The primary outcome measure was sustained virologic response at post-treatment Week 12 (SVR12). Results
Overall, 874 patients were treated: Lambda/RBV, n = 353; Lambda/RBV + DCV, n = 349; alfa/RBV, n = 172. Patients were 65 % white and 33 % Asian, 57 % male, with a mean age of 47 years; 52 % were infected with genotype 2 (6 % cirrhotic) and 48 % with genotype 3 (9 % cirrhotic). In the Lambda/RBV + DCV group, 83 % (95 % confidence interval [CI] 78.5, 86.5) achieved SVR12 (90 % genotype 2, 75 % genotype 3) whereas SVR12 was achieved by 68 % (95 % CI 63.1, 72.9) with Lambda/RBV (72 % genotype 2, 64 % genotype 3) and 73 % (95 % CI 66.6, 79.9) with peginterferon alfa/RBV (74 % genotype 2, 73 % genotype 3). Lambda/RBV + DCV was associated with lower incidences of flu-like symptoms, hematological abnormalities, and discontinuations due to adverse events compared with alfa/RBV. Conclusion The 12-week regimen of Lambda/RBV + DCV was superior to peginterferon alfa/RBV in the combined population of treatment-naive patients with genotype 2 or 3 infection, with an improved tolerability and safety profile compared with alfa/RBV. Electronic supplementary material The online version of this article (doi:10.1186/s40064-016-2920-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Graham R Foster
- Department of Hepatology, Queen Mary University of London, 4 Newark Street, London, UK
| | - Kazuaki Chayama
- Department of Gastroenterology and Nutrition, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima-shi, Hiroshima, Japan
| | - Wan-Long Chuang
- Hepatobiliary Division, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Road, Kaohsiung, Taiwan
| | - Hugo Fainboim
- Liver Unit, Hospital F. J. Muñiz, Uspallata 2272, Buenos Aires, Argentina
| | - Martti Farkkila
- Helsinki University and Clinic of Gastroenterology, University of Helsinki, Haartmaninkatu 4, Helsinki, Finland
| | - Adrian Gadano
- Liver Unit, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Giovanni B Gaeta
- Internal and Specialistic Medicine, Viral Hepatitis Unit, Second University of Naples, Via Pansini 5 Bld.3, 08131 Naples, Italy
| | - Christophe Hézode
- Hepatology, Henri Mondor Hospital, AP-HP, INSERM U955, University Paris-Est, 51 av du Maréchal de Lattre de Tassigny, Créteil, France
| | - Yukiko Inada
- Center for Digestive and Liver Diseases, Miyazaki Medical Center Hospital, 2-16 Takamtsu-cho, Miyazaki-shi, Miyazaki, Japan
| | - Jeong Heo
- Department of Internal Medicine, Pusan National University and Medical Research Institute, College of Medicine, Pusan National University Hospital, 179 Gudeok-Ro, Seo-gu, Pusan, Republic of Korea
| | - Hiromitsu Kumada
- Department of Hepatology, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, Japan
| | - Sheng-Nan Lu
- Section of Hepatology, Division of Hepatogastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, 123 Taoei Road, Niaosung District, Kaohsiung, 833 Taiwan
| | - Patrick Marcellin
- Hepatology, Hôpital Beaujon, 100 Bd du Général Leclerc, 92110 Clichy, France
| | - Christophe Moreno
- Department of Gastroenterology, Hepatopancreatology and Digestive Oncology, CUB Hôpital Erasme, Université Libre de Bruxelles, 808 Route de Lennik, 1070 Brussels, Belgium
| | - Stuart K Roberts
- Gastroenterology, Alfred Hospital, 99 Commercial Road, Melbourne, Australia ; Department of Medicine, Monash University, Melbourne, Australia
| | - Simone I Strasser
- AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Missenden Rd, Camperdown, Sydney, NSW 20150 Australia
| | - Alexander J Thompson
- Department of Gastroenterology, St. Vincent's Hospital and the University of Melbourne, SVHM Level 4 Daly Wing, 35 Victoria Pde, PO Box 29000, Fitzroy, Australia
| | - Joji Toyota
- Department of Hepatology, Sapporo Kosei General Hospital, Kita 3 Higashi 8-5, Chuo-ku, Sapporo, Japan
| | - Seung Woon Paik
- Department of Medicine, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, Republic of Korea
| | - John M Vierling
- Baylor Liver Health, Baylor College of Medicine, 6620 Main Street, Suite 1425, Houston, TX USA
| | - Anna L Zignego
- Department of Experimental and Clinical Medicine, MASVE Center, Universita Di Firenze, Largo Brambilia, 3, 50134 Florence, Italy
| | - David Cohen
- Bristol-Myers Squibb Global Biometric Sciences, 5 Research Parkway, Wallingford, CT USA
| | - Fiona McPhee
- Discovery Virology, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, CT USA
| | - Megan Wind-Rotolo
- Exploratory Clinical and Translational Research, Bristol-Myers Squibb Company, Princeton, NJ USA
| | - Subasree Srinivasan
- Global Clinical Research, Bristol-Myers Squibb Company, 5 Research Parkway, Wallingford, CT 06492 USA
| | - Matthew Hruska
- Clinical Pharmacology and Pharmacometrics, Bristol-Myers Squibb Company, Hopewell, NJ USA
| | - Heather Myler
- Analytical and Bioanalytical Development, Bristol Myers Squibb Company, Princeton, NJ USA
| | - Simon D Portsmouth
- Global Clinical Research, Bristol-Myers Squibb Company, 5 Research Parkway, Wallingford, CT 06492 USA ; Shionogi Inc., 300 Campus Drive, Florham Park, NJ 07932 USA
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Inada Y, Tsutsui Y, Wasada H, Funahashi S. Solvation Structure of Solvated Cu(I) Ions in Non-Aqueous Solvents as Studied by EXAFS and ab initio Molecular Orbital Methods. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1999-0207] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The structure parameters around the Cu(I) ion in pyridine (PY), 4-methylpyridine (4MPY), 2-methylpyridine (2MPY), 2,6-dimethylpyridine (26DMPY), and acetonitrile (AN) were determined by the extended X-ray absorption fine structure (EXAFS) method. The solvation structures of the Cu(I) ion in PY, 4MPY, and AN are 4-coordinate tetrahedral with Cu-N bond lengths of 205, 205, and 200 pm, respectively. In the case of 2MPY and 26DMPY, the Cu(I) ion has a 3-coordinate triangular structure with a Cu-N bond length of 201 pm. Such a decrease in the coordination number was interpreted in terms of the bulkiness of the solvent molecules. In order to clarify the most stable solvation structure of the Cu(I) ion, we carried out ab initio molecular orbital calculations for the solvation system of [Cu(NCH)n]+ (n = 1 - 6 ) where the steric effect is negligible. The Gibbs free energy of solvation was the smallest in the case of n = 4 and the 4-coordinate tetrahedral solvation of the Cu(I) ion was theoretically evaluated as most stable. The enthalpy of solvation monotonously decreases with increasing n, while the entropy of solvation proportionally increases. Although a larger gain of enthalpy is observed for the octahedral structure rather than the tetrahedral one, the entropic loss for the former overcomes the enthalpic gain.
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Affiliation(s)
- Y. Inada
- Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Y. Tsutsui
- Laboratory of Analytical Chemistry, Faculty of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - H. Wasada
- Department of Chemistry, Faculty of Regional Studies, Gifu University, 1-1 Yanagido, Gifu 501-1112, Japan
| | - S. Funahashi
- Laboratory of Analytical Chemistry, Faculty of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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15
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Zaitsu M, Inada Y, Tashiro K, Hayashi C, Doi H, Hamasaki Y, Matsuo M. Acute alcohol intoxication in a 15-day-old neonate. Pediatr Int 2013; 55:792-4. [PMID: 24330291 DOI: 10.1111/ped.12134] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 04/16/2013] [Accepted: 04/23/2013] [Indexed: 11/27/2022]
Abstract
We describe a 15-day-old newborn girl who was fed with formula milk that was accidentally diluted with sake (Japanese wine prepared from fermented rice). The clinical features were flushed skin, tachycardia and low blood pressure indicating circulatory failure, somnolence and metabolic acidosis without hypoglycemia. The serum ethanol concentration was 43.0 mg/dL at 3 h after intake. The patient recovered under intravenous fluid replacement without complications. Follow-up examinations at 1, 2, 3, 6 and 12 months confirmed normal psychomotor development.
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Affiliation(s)
- Masafumi Zaitsu
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
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Yoshida N, Yagi N, Inada Y, Kugai M, Naito Y. Preventing Complications at Endoscopic Submucosal Dissection for Colorectal Neoplasia. Video Journal and Encyclopedia of GI Endoscopy 2013; 1:397-398. [DOI: 10.1016/s2212-0971(13)70176-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/11/2023]
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17
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Taniguchi K, Yamamoto S, Hitomi E, Inada Y, Suyama Y, Sugioka T, Hamasaki Y. Interleukin 33 is induced by tumor necrosis factor alpha and interferon gamma in keratinocytes and contributes to allergic contact dermatitis. J Investig Allergol Clin Immunol 2013; 23:428-434. [PMID: 24459820] [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: 06/03/2023] Open
Abstract
BACKGROUND Interleukin (IL) 33, a novel member of the IL-1 family, is produced mainly by epithelial cells and endothelial cells in response to various types of stress, including necrosis. The effects of IL-33 on the immune cells involved in allergic contact dermatitis have recently been revealed in vitro. However, in vivo, the induction mechanism and function of IL-33 are not fully understood. OBJECTIVES Our objectives were to investigate induction of IL-33 in keratinocytes and to evaluate the functions of IL-33 and its inducers in a murine model of allergic contact dermatitis. MATERIAL AND METHODS KERTr cells, a human keratinocyte cell line, were cultured with various cytokines, including tumor necrosis factor (TNF) alpha and interferon (IFN) gamma. IL-33 expression was detected using quantitative reverse transcriptase polymerase chain reaction, immunocytochemistry, and Western blotting. The functions of IL-33, TNF-a, and IFN-y in allergic contact dermatitis were evaluated using a murine model. RESULTS TNF-alpha and IFN-gamma induced expression of IL-33 mRNA and protein in KERTr cells. Blockade of IL-33 attenuated swelling in the ears of the experimental mice. Similar effects were noted for blockade of TNF-alpha and IFN-gamma in these mice. CONCLUSIONS TNF-alpha and IFN-gamma induce expression of IL-33, and IL-33 produced by keratinocytes contributes to allergic contact dermatitis. Blockade of IL-33, TNF-alpha, and IFN-gamma could represent novel and potent strategies to treat allergic contact dermatitis.
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Affiliation(s)
- K Taniguchi
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
| | - S Yamamoto
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
| | - E Hitomi
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
| | - Y Inada
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
| | - Y Suyama
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
| | - T Sugioka
- Community Medical Support Institute, Faculty of Medicine, Saga University, Saga, Japan
| | - Y Hamasaki
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
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18
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Tatsugami F, Matsuki M, Nakai G, Inada Y, Kanazawa S, Takeda Y, Morita H, Takada H, Yoshikawa S, Fukumura K, Narumi Y. The effect of adaptive iterative dose reduction on image quality in 320-detector row CT coronary angiography. Br J Radiol 2012; 85:e378-82. [PMID: 22253355 DOI: 10.1259/bjr/10084599] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the effect of adaptive iterative dose reduction (AIDR) on image noise and image quality as compared with standard filtered back projection (FBP) in 320-detector row CT coronary angiography (CTCA). METHODS 50 patients (14 females, mean age 68 ± 9 years) who underwent CTCA (100 kV or 120 kV, 400-580 mA) within a single heartbeat were enrolled. Studies were reconstructed with FBP and subsequently AIDR. Image noise, vessel contrast and contrast-to-noise ratio (CNR) in the coronary arteries were evaluated. Overall image quality for coronary arteries was assessed using a five-point scale (1, non-diagnostic; 5, excellent). RESULTS All the examinations were performed in a single heartbeat. Image noise in the aorta was significantly lower in data sets reconstructed with AIDR than in those reconstructed with FBP (21.4 ± 3.1 HU vs 36.9 ± 4.5 HU; p<0.001). No significant differences were observed between FBP and AIDR for the mean vessel contrast (HU) in the proximal coronary arteries. Consequently, CNRs in the proximal coronary arteries were higher in the AIDR group than in the FBP group (p<0.001). The mean image quality score was improved by AIDR (3.75 ± 0.38 vs 4.24 ± 0.38; p<0.001). CONCLUSION The use of AIDR reduces image noise and improves image quality in 320-detector row CTCA.
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Affiliation(s)
- F Tatsugami
- Department of Radiology, Osaka Medical College, Takatsuki City, Osaka, Japan.
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19
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Uemura Y, Inada Y, Bando KK, Sasaki T, Kamiuchi N, Eguchi K, Yagishita A, Nomura M, Tada M, Iwasawa Y. In situ time-resolved XAFS study on the structural transformation and phase separation of Pt3Sn and PtSn alloy nanoparticles on carbon in the oxidation process. Phys Chem Chem Phys 2011; 13:15833-44. [PMID: 21826303 DOI: 10.1039/c1cp20994a] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The dynamic behavior and kinetics of the structural transformation of supported bimetallic nanoparticle catalysts with synergistic functions in the oxidation process are fundamental issues to understand their unique catalytic properties as well as to regulate the catalytic capability of alloy nanoparticles. The phase separation and structural transformation of Pt(3)Sn/C and PtSn/C catalysts during the oxidation process were characterized by in situ time-resolved energy-dispersive XAFS (DXAFS) and quick XAFS (QXAFS) techniques, which are element-selective spectroscopies, at the Pt L(III)-edge and the Sn K-edge. The time-resolved XAFS techniques provided the kinetics of the change in structures and oxidation states of the bimetallic nanoparticles on carbon surfaces. The kinetic parameters and mechanisms for the oxidation of the Pt(3)Sn/C and PtSn/C catalysts were determined by time-resolved XAFS techniques. The oxidation of Pt to PtO in Pt(3)Sn/C proceeded via two successive processes, while the oxidation of Sn to SnO(2) in Pt(3)Sn/C proceeded as a one step process. The rate constant for the fast Pt oxidation, which was completed in 3 s at 573 K, was the same as that for the Sn oxidation, and the following slow Pt oxidation rate was one fifth of that for the first Pt oxidation process. The rate constant and activation energy for the Sn oxidation in PtSn/C were similar to those for the Sn oxidation in Pt(3)Sn/C. In the PtSn/C, however, it was hard for Pt oxidation to PtO to proceed at 573 K, where Pt oxidation was strongly affected by the quantity of Sn in the alloy nanoparticles due to swift segregation of SnO(2) nanoparticles/layers on the Pt nanoparticles. The mechanisms for the phase separation and structure transformation in the Pt(3)Sn/C and PtSn/C catalysts are also discussed on the basis of the structural kinetics of the catalysts themselves determined by the in situ time-resolved DXAFS and QXAFS.
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Affiliation(s)
- Y Uemura
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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20
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Aoki D, Wi´niewski P, Miyake K, Watanabe N, Inada Y, Settai R, Yamamoto E, Haga Y, Onuki Y. Cylindrical Fermi surfaces formed by a fiat magnetic Brillouin zone in uranium dipnictides. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642810008208582] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- D. Aoki
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - P. Wi´niewski
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - K. Miyake
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - N. Watanabe
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - Y. Inada
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - R. Settai
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - E. Yamamoto
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - Y. Haga
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
| | - Y. Onuki
- a Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043, Japan
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21
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Ouyang ZW, Matsuda YH, Nojiri H, Inada Y, Niwa Y, Arima T. Insulator-metal phase transition of Pr(0.6)Ca(0.4)MnO(3) studied by x-ray absorption spectroscopy in pulsed magnetic fields. J Phys Condens Matter 2009; 21:016006. [PMID: 21817243 DOI: 10.1088/0953-8984/21/1/016006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Evolution of the Mn K-edge x-ray absorption near edge structure (XANES) in Pr(0.6)Ca(0.4)MnO(3) at pulsed magnetic fields has been investigated. A small enhancement of XANES spectra is detected across the magnetic-field-induced transition from the charge- and orbital-ordered (COO) insulator to ferromagnetic metal at 20 K. It is found that the magnetic-field dependence of the enhancement shows clear hysteresis, as seen in the magnetization with metamagnetic transition, suggesting a significant correlation between the change in the XANES and the field-induced collapse of the COO state. The enhancement of the absorption can be explained by an increase of the 4p density of states due to a reduction of hybridization between the 4p state of the central Mn ion with the core hole and the neighboring Mn 3d state. Local structural change around Mn ions is expected to modify the strength of the hybridization.
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Affiliation(s)
- Z W Ouyang
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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22
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Nishi N, Yamamoto S, Ou W, Muro E, Inada Y, Hamasaki Y. Enhanced CCL26 production by IL-4 through IFN-gamma-induced upregulation of type 1 IL-4 receptor in keratinocytes. Biochem Biophys Res Commun 2008; 376:234-40. [PMID: 18774776 DOI: 10.1016/j.bbrc.2008.08.136] [Citation(s) in RCA: 9] [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] [Received: 08/13/2008] [Accepted: 08/28/2008] [Indexed: 01/25/2023]
Abstract
A Th2 cytokine, IL-4, induces various chemokines from epidermal keratinocytes which play crucial roles in the pathogenesis of skin disorders such as atopic dermatitis. In contrast, the role of IFN-gamma, a Th1 cytokine, on eosinophilic skin inflammation is unclear. This study investigated the effects of IFN-gamma on IL-4-induced production of eotaxin-3/CCL26, a potent chemoattractant to eosinophils, in normal human epidermal keratinocytes (NHEK). When the cells were stimulated with IL-4 and IFN-gamma simultaneously, IL-4-induced CCL26 production was attenuated. In contrast, prior stimulation with IFN-gamma enhanced IL-4-induced CCL26 production. NHEK constitutively expressed type 1 IL-4 receptor, and expression at the cell surface was upregulated by stimulation with IFN-gamma. This upregulation resulted in an enhanced IL-4-mediated cellular signal. These results indicate that IFN-gamma has opposite effects on IL-4-induced CCL26 production in NHEK depending on the time of exposure. Thus, changes in IL-4R expression by IFN-gamma might modulate eosinophilic skin inflammation.
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Affiliation(s)
- Natsuko Nishi
- Department of Pediatrics, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga 849-8501, Japan
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Matsushita T, Arakawa E, Niwa Y, Inada Y, Ishii M, Sakurai K, Nomura M, Hirano K. Quick X-ray reflectometry in simultaneous multiwavelength dispersive mode. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308099522] [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: 11/10/2022] Open
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Inada Y, Tokita H, Futagami M, Takanobu H. Analytical study of collective motion of organisms focusing on the link between local and global properties in a group. Comp Biochem Physiol A Mol Integr Physiol 2008. [DOI: 10.1016/j.cbpa.2008.04.150] [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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Matsuki M, Inada Y, Nakai G, Tatsugami F, Tanikake M, Narabayashi I, Masuda D, Arisaka Y, Takaori K, Tanigawa N. Diffusion-weighed MR imaging of pancreatic carcinoma. ACTA ACUST UNITED AC 2008; 32:481-3. [PMID: 17431713 DOI: 10.1007/s00261-007-9192-6] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
PURPOSE The aim of this study was to demonstrate the feasibility of body diffusion-weighted (DW) MR imaging in the evaluation of a pancreatic carcinoma. MATERIAL AND METHODS In nine normal volunteers and in eight patients with pancreatic carcinoma, DW images were obtained on the axial plane scanning with a multisection spin-echo-type single-shot echo planar sequence with a body coil. Moreover, we measured the apparent diffusion coefficient (ADC) value in a circular region of interest (ROI) within the normal pancreas, pancreatic carcinoma, and tumor-associated chronic pancreatitis. RESULTS On the DW images, all eight carcinomas were clearly shown as high signal intensity relative to the surrounding tissue. The ADC value (x10(-3) mm(2)/s) in the carcinoma was 1.44 +/- 0.20, which was significantly lower compared to that of normal pancreas (1.90 +/- 0.06) and tumor-associated chronic pancreatitis (2.31 +/- 0.18). CONCLUSION Diffusion-weighted (DW) images can be helpful in detecting the pancreatic carcinoma and accessing the extent of the tumor.
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Affiliation(s)
- M Matsuki
- Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
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Tatsugami F, Matsuki M, Inada Y, Nakai G, Tanikake M, Yoshikawa S, Narabayashi I. Usefulness of saline pushing in reduction of contrast material dose in abdominal CT: evaluation of time–density curve for the aorta, portal vein and liver. Br J Radiol 2007; 80:231-4. [PMID: 17038409 DOI: 10.1259/bjr/60407135] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The effects of saline pushing after contrast material injection were investigated as well as the possibility for this technique to reduce contrast material doses in liver CT examinations. 52 patients were divided randomly into three groups: 100 ml of contrast material (300 mg I ml(-1)) only (A; n = 19), 100 ml of contrast material pushed with 50 ml of saline solution (B; n = 17), and 85 ml of contrast material pushed with 50 ml of saline solution (C; n = 16). Single-level images were obtained at the level of the main portal vein after the initiation of contrast material injection. There were no significant differences in the mean peak enhancement values (PE) and the mean time to peak enhancement values (TPE) of the aorta between the three groups. The mean PE of the portal vein in group B increased 21 HU over that in group A (p<0.05), and there was no significant difference between groups A and C. The mean PE of the liver in group B increased 7 HU over that in group A (p<0.05), and there was no significant difference between groups A and C. The mean TPE of the portal vein was shorter by 4 s (p<0.05), and that of the liver was shorter by 5 s (p<0.05) in group C compared with those in group A. In conclusion, saline pushing increases the enhancement values of the portal vein and liver, and allows a contrast material dose reduction of 15 ml without decreasing hepatic and vascular enhancement at adequate scan timing.
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Affiliation(s)
- F Tatsugami
- Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
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Nishiyama M, Inada Y, Zheng GQ. Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li(2)Pt(3)B. Phys Rev Lett 2007; 98:047002. [PMID: 17358799 DOI: 10.1103/physrevlett.98.047002] [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] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Indexed: 05/14/2023]
Abstract
We report (11)B and (195)Pt NMR measurements in noncentrosymmetric superconductor Li(2)Pt(3)B. We find that the spin susceptibility measured by the Knight shift remains unchanged across the superconducting transition temperature T(c). With decreasing temperature (T) below T(c), the spin-lattice relaxation rate 1/T(1) decreases with no coherence peak and is in proportion to T3. These results indicate that the Cooper pair is in the spin-triplet state and that there exist line nodes in the superconducting gap function. They are in sharp contrast to those in the isostructural Li(2)Pd(3)B which is a spin-singlet, s-wave superconductor, and are ascribed to the enhanced spin-orbit coupling due to the lack of spatial inversion symmetry. Our finding points to a new paradigm where exotic superconductivity arises in the absence of electron-electron correlations.
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Affiliation(s)
- M Nishiyama
- Department of Physics, Okayama University, Okayama 700-8530, Japan
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Matsuki M, Kanazawa S, Kanamoto T, Inada Y, Kani H, Tanikake M, Yoshikawa S, Narabayashi I, Tatsumi Y, Nishimura H, Lee SW, Nomura E, Okuda J, Tanigawa N. Virtual CT gastrectomy by three-dimensional imaging using multidetector-row CT for laparoscopic gastrectomy. ACTA ACUST UNITED AC 2006; 31:268-76. [PMID: 16705397 DOI: 10.1007/s00261-005-0360-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- M Matsuki
- Department of Radiology, Osaka Medical College, 2-7 Daigaku-mach, Takatsuki City, Osaka Prefecture 569-8686, Japan.
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30
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Shimbo T, Inomata Y, Inada Y, Takahashi M, Tatsumi T, Uesugi Y, Narabayashi I. 2051. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.454] [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: 10/24/2022]
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31
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Fujii T, Iida Y, Yomogida M, Ikeda K, Haga T, Jikumaru Y, Ninami M, Nishimura N, Kodera Y, Inada Y, Shirai T, Hirose S, Nishimura H. Genetic control of the spontaneous activation of CD4+ Th cells in systemic lupus erythematosus-prone (NZB x NZW) F1 mice. Genes Immun 2006; 7:647-54. [PMID: 17024131 DOI: 10.1038/sj.gene.6364342] [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: 11/09/2022]
Abstract
The F(1) hybrid of autoimmune hemolytic anemia-prone NZB and nonautoimmune NZW strains of mice has been studied as a murine model of systemic lupus erythematosus. Both NZB and F(1) hybrid mice show age-dependent spontaneous activation of peripheral CD4(+) T cells as reflected by the elevated frequencies of CD4(+) T cells positive for CD69 early activation marker. Both strains also show age-dependent abnormal decrease of the frequencies of CD62L(+) naive CD4(+) T cells and/or NTA260(+) memory CD4(+) T cells in the spleen. We studied the multigenic control of these abnormal features of peripheral CD4(+) T cells in (NZB x NZW) F(1) x NZW backcross mice by quantitative trait loci mapping and by association rule analysis. The abnormally elevated frequencies of CD69(+)CD4(+) T cells and decreased frequencies of CD62L(+) naive and/or NTA260(+) memory CD4(+) T cells were under the common genetic control, in which the interaction between MHC and a hitherto unknown locus, designated Sta-1 (spontaneous T-cell activation) on chromosome 12, plays a major role. The allelic effects of these loci likely predispose CD4(+) T cells to the loss of self-tolerance, and are responsible for the accelerated autoimmune phenotypes of (NZB x NZW) F(1) hybrid mice.
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MESH Headings
- Age Factors
- Animals
- Antibodies, Monoclonal/immunology
- Antigens, CD/metabolism
- Antigens, Differentiation, T-Lymphocyte/metabolism
- Autoimmunity/genetics
- Chromosome Mapping
- Crosses, Genetic
- Flow Cytometry
- L-Selectin/metabolism
- Lectins, C-Type
- Lupus Erythematosus, Systemic/genetics
- Lupus Erythematosus, Systemic/immunology
- Lymphocyte Activation/genetics
- Mice
- Mice, Inbred NZB
- Microsatellite Repeats/genetics
- Quantitative Trait Loci/genetics
- Spleen/metabolism
- T-Lymphocytes, Helper-Inducer/immunology
- T-Lymphocytes, Helper-Inducer/metabolism
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Affiliation(s)
- T Fujii
- Department of Biomedical Engineering, Toin Human Science and Technology Center, Toin University of Yokohama, Yokohama, Japan
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32
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Matsuki M, Okuda J, Kanazawa S, Kanamoto T, Inada Y, Tatsugami F, Kani H, Tanikake M, Yoshikawa S, Narabayashi I, Lee SW, Tanaka K, Tanigawa N. Virtual CT colectomy by three-dimensional imaging using multidetector-row CT for laparoscopic colorectal surgery. ACTA ACUST UNITED AC 2006; 30:698-708. [PMID: 16252145 DOI: 10.1007/s00261-005-0328-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Laparoscopic colorectal surgery has been attracting attention for its capacity to improve the quality of life (QOL) of patients. However, there are disadvantages to this approach, namely, it is difficult to obtain an image of the entire view of the operative field, and organs and lesions cannot be manipulated directly by the surgeon during surgery. For this reason, it takes a relatively large amount of time to ligate vessel, which can vary between patients. Furthermore, vessels and organs can be damaged during lymph nodes dissection under laparoscopic guidance, leading to heavy bleeding that prevents the surgeon from having access to a good view of the operative field. Then, to assess preoperatively the vascular anatomy, we carried out multiphase, contrast-enhanced examinations using multidetector-row CT (MDCT) on patients with colorectal cancer, and prepared the fused image of 3D images of arteries, veins, the colorectum, organs, and tumor. We called the utilization of 3D imaging virtual CT colectomy, which contributed to rapid and safe manipulation of the origins of the arteries and the veins, as well as lymph nodes dissection, without incurring injury to the involved arteries and veins.
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Affiliation(s)
- M Matsuki
- Department of Radiology, Osaka Medical College, Takatsuki City, Japan.
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Ikeda K, Schiltz E, Fujii T, Takahashi M, Mitsui K, Kodera Y, Matsushima A, Inada Y, Schulz GE, Nishimura H. Phenylalanine ammonia-lyase modified with polyethylene glycol: potential therapeutic agent for phenylketonuria. Amino Acids 2005; 29:283-7. [PMID: 15977040 DOI: 10.1007/s00726-005-0218-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2005] [Accepted: 05/04/2005] [Indexed: 11/24/2022]
Abstract
Phenylketonuria (PKU) is an autosomal recessive genetic disease caused by the defects in the phenylalanine hydroxylase (PAH) gene. Individuals homozygous for defective PAH alleles show elevated levels of systemic phenylalanine and should be under strict dietary control to reduce the risk of neuronal damage associated with high levels of plasma phenylalanine. Researchers predict that plant phenylalanine ammonia-lyase (PAL), which converts phenylalanine to nontoxic t-cinnamic acid, will be an effective therapeutic enzyme for the treatment of PKU. The problems of this potential enzyme therapy have been the low stability in the circulation and the antigenicity of the plant enzyme. Recombinant PAL originated from parsley (Petroselinum crispum) chemically conjugated with activated PEG2 [2,4-bis(O-methoxypolyethyleneglycol)-6-chloro-s-triazine] showed greatly enhanced stability in the circulation and was effective in reducing the plasma concentration of phenylalanine in the circulation of mice. PEG-PAL conjugate will be an effective therapeutic enzyme for the treatment of PKU.
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Affiliation(s)
- K Ikeda
- Toin Human Science and Technology Center, Department of Biomedical Engineering, Toin University of Yokohama, Yokohama, Japan
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Nakamura H, Katizawa K, Inada Y, Kato N, Mukai M, Akashi M, Sugisaki T. Perineal-onset Fourniers gangrene in a patient undergoing hemodialysis importance of perineal-onset manifestation. Clin Nephrol 2005; 63:317-20. [PMID: 15847262 DOI: 10.5414/cnp63317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We present a rare case of perineal-onset Fournier's gangrene in a patient undergoing hemodialysis. A 51-year-old Japanese man manifested an acute-onset perineal pain with perirectal abscess; subsequently, the pain extended to the abdomen, chest, and loin despite quick treatment. His consciousness deteriorated to delirium and he died of septic shock on the third day of admission. Computed tomography (CT) revealed soft-tissue air along the right rectal wall, moreover, the infection extended to the anterior wall of the bladder and the right peripsoas muscle. On the basis of the clinical course and CT findings, the patient was diagnosed as having the complications of Fournier's gangrene, however, no scrotal lesions were detected. Fournier's gangrene is considered to be easily diagnosed on the basis of skin lesions, such as scrotal erythema and swelling. However, in the early stage, the diagnosis of Fournier's gangrene is difficult in a patient with perineal pain before the detection of skin lesions. In conclusion, definitely the key to improving the prognosis of this fulminant infection is the prompt recognition of the pathological process. Therefore, Fournier's gangrene should always be considered when patients undergoing hemodialysis manifest perirectal disorders, even when no scrotal lesions are detected, because there is the possibility of intra-abdominal and intra-retroperitoneal infections resulting in septic shock.
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Affiliation(s)
- H Nakamura
- Department of Internal Medicine, Kanto Rosai Hospital, Kanagawa, Japan.
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35
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Abstract
To clarify the aspects and role of oropharyngeal closure, soft palate movements during sucking were observed and then assessed by electromyographic and fluoroscopic analyses. Three patterns of sucking movements by the palatoglossus and levator veli palatini muscles were analyzed with electromyographic means in seven healthy adults. Furthermore, a forced sucking maneuver, which required special effort to produce a strong sucking pressure by opening the jaw, was analyzed using lateral fluoroscopy in three of the subjects. During all tested sucking movements, the palatoglossus muscle showed continuous activity. The levator veli palatini muscle did not show remarkable activity during regular air sucking or water sucking when water was held in the oral cavity. However, its participation increased when intraoral sucking pressure was increased by opening the jaw, and lateral fluoroscopic examinations revealed that the soft palate was pulled toward the oral cavity to form a tight contact between the rostral portion of the soft palate and the retrotongue, causing the soft palate to make an "L" shape. The palatoglossus muscle plays a major role in palatal movement during sucking. Furthermore, the levator veli palatini muscle, whose activity was observed only during high-pressure sucking with an open jaw, may act to maintain tension in the soft palate against strong negative pressure in the oral cavity.
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Affiliation(s)
- S Iida
- First Department of Oral and Maxillofacial Surgery, Osaka University Graduate School of Dentistry, Osaka, Suita, Japan.
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36
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Inada Y, Nakane T, Chiba S. Binding of KRH-594, an antagonist of the angiotensin II type 1 receptor, to cloned human and rat angiotensin II receptors. Fundam Clin Pharmacol 2002; 16:317-23. [PMID: 12570021 DOI: 10.1046/j.1472-8206.2002.00076.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We studied the binding properties of KRH-594, a new selective antagonist of angiotensin II (AII) type 1 (AT1) receptors, to rat liver membranes and to recombinant AT1 and AT2 receptors. Preincubation of rat liver membranes with KRH-594 produced maximal inhibition of [125I]-AII binding when the preincubation time was 1-2 h. Preincubation with KRH-594 for 2 h decreased the B(max) value and increased the Kd value. For human AT1, human AT2, rat AT1A and rat AT1B receptors, the Ki values for KRH-594 were 1.24, 9360, 0.67, and 1.02 nm, respectively. The rank order of K1 values for human AT1 receptors was KRH-594 >> EXP3174 > candesartan = AII. The order of specificities for human AT1 and AT2 receptors was candesartan > EXP3174 > KRH-594. Although a 2-h preincubation of human AT2 receptors with KRH-594 (30 microM) or CGP 42112 (a selective AT2 receptor antagonist; 0.3 nM) inhibited binding of [125I]-AII, the suppression by KRH-594 was not significant. These results indicate that KRH-594 binds potently to AT1 receptors in an insurmountable manner, and that at a very high dose (30 microM) it may also bind to AT2 receptors, but in a surmountable manner.
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Affiliation(s)
- Y Inada
- Department of Pharmacology, Shinshu University School of Medicine, Asahi, Matsumoto, Japan
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37
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Kaizu K, Sun XF, Uriu K, Ikeda M, Hashimoto O, Komine N, Takagi I, Qie YL, Inada Y, Ito A, Eto S. Comparison of the renal effects of different angiotensin-converting enzyme inhibitors in patients with chronic renal diseases. Clin Exp Nephrol 2002. [DOI: 10.1007/s101570200004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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38
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Abstract
Chymotrypsin was modified in the zymogen form with 2,4-bis(O-methoxypolyethylene glycol)-6-chloro-s-triazine (activated PEG2), followed by activation with trypsin. The modified enzyme was soluble in benzene and retained its enzymic activity. Acid-amide bond formation by the modified enzyme proceeded efficiently in benzene: N-benzoyltyrosine butylamide was made from N-benzoyl-L-tyrosine ethyl ester and n-butylamine, and benzoyltyrosine(oligo)phenylalanine ethyl esters were formed from N-benzoyl-L-tyrosine ethyl ester and L-phenylalanine ethyl ester.
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39
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Inamo M, Kamiya N, Inada Y, Nomura M, Funahashi S. Structural characterization and formation kinetics of sitting-atop (SAT) complexes of some porphyrins with copper(II) ion in aqueous acetonitrile relevant to porphyrin metalation mechanism. Structures of aquacopper(II) and cu(II)-SAT complexes as determined by XAFS spectroscopy. Inorg Chem 2001; 40:5636-44. [PMID: 11599964 DOI: 10.1021/ic010162b] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The formation of the sitting-atop (SAT) complexes of 5,10,15,20-tetraphenylporphyrin (H(2)tpp), 5,10,15,20-tetrakis(4-chlorophenyl)porphyrin (H(2)t(4-Clp)p), 5,10,15,20-tetramesitylporphyrin (H(2)tmp), and 2,3,7,8,12,13,17,18-octaethylporphyrin (H(2)oep) with the Cu(II) ion was spectrophotometrically confirmed in aqueous acetonitrile (AN), and the formation rates were determined as a function of the water concentration (C(W)). The decrease in the conditional first-order rate constants with the increasing C(W) was reproduced by taking into consideration the contribution of [Cu(H(2)O)(an)(5)](2+) in addition to [Cu(an)(6)](2+) to form the Cu(II)-SAT complexes. The second-order rate constants for the reaction of [Cu(an)(6)](2+) and [Cu(H(2)O)(an)(5)](2+) at 298 K were respectively determined as follows: (4.1 +/- 0.2) x 10(5) and (3.6 +/- 0.2) x 10(4) M(-1) s(-1) for H(2)tpp, (1.15 +/- 0.06) x 10(5) M(-1) s(-1) and negligible for H(2)t(4-Clp)p, and (4.8 +/- 0.3) x 10(3) and (1.3 +/- 0.3) x 10(2) M(-1) s(-1) for H(2)tmp. Since the reaction of H(2)oep was too fast to observe the reaction trace due to the dead time of 2 ms for the present stopped-flow technique, the rate constant was estimated to be greater than 1.5 x 10(6) M(-1) s(-1). According to the structure of the Cu(II)-SAT complexes determined by the fluorescent XAFS measurements, two pyrrolenine nitrogens of the meso-substituted porphyrins (H(2)tpp and H(2)tmp) bind to the Cu(II) ion with a Cu-N(pyr) distance of ca. 2.04 A, while those of the beta-pyrrole-substituted porphyrin (H(2)oep) coordinate with the corresponding bond distance of 1.97 A. The shorter distance of H(2)oep is ascribed to the flexibility of the porphyrin ring, and the much greater rate for the formation of the Cu(II)-SAT complex of H(2)oep than those for the meso-substituted porphyrins is interpreted as due to a small energetic loss at the porphyrin deformation step during the formation of the Cu(II)-SAT complex. The overall formation constants, beta(n), of [Cu(H(2)O)(n)()(an)(6)(-)(n)](2+) for the water addition in aqueous AN were spectrophotometrically determined at 298 K as follows: log(beta(1)/M(-1)) = 1.19 +/- 0.18, log(beta(2)/M(-2)) = 1.86 +/- 0.35, and log(beta(3)/M(-3)) = 2.12 +/- 0.57. The structure parameters around the Cu(II) ion in [Cu(H(2)O)(n)(an)(6-n)](2+) were determined using XAFS spectroscopy.
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Affiliation(s)
- M Inamo
- Department of Chemistry, Aichi University of Education, Igaya, Kariya 448-8542, Japan
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40
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Murata K, Inada Y, Fukui A, Tamai S, Takakura Y. Clinical application of the reversed pedicled venous flap containing perivenous areolar tissue and/or nerve in the hand. Br J Plast Surg 2001; 54:615-20. [PMID: 11583499 DOI: 10.1054/bjps.2001.3673] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A reversed pedicled venous flap containing perivenous areolar tissue and/or nerve was used to cover traumatic skin defects of seven fingers in six patients. The series consisted of six men, ranging in age from 20 to 57 years (average: 39 years). The reconstructed sites were four dorsal skin defects and three volar skin defects of the finger. The flap was designed on the dorsum of the hand, in such a way as to place a vein at the centre of the flap and not to involve the dorsal metacarpal artery. The flap contained a dorsal vein, perivenous areolar tissue and fascia of the interosseous muscle. Cutaneous nerves were present in three of the seven flaps. The pedicle of the flap was dissected distally to the finger web space and the flap was transferred to the skin defect. The size of the flap ranged from 1.4x4.5 cm to 6.0x7.0 cm. The average length of the pedicle was 1.6 cm. Skin grafting was needed at the donor site in one case (flap size: 6.0x7.0 cm), but primary closure was possible in the remaining cases. Postoperatively, the largest flap showed superficial necrosis, although it survived. The remaining flaps survived completely. This suggests that in a large flap the skin should be attached to the pedicle to prevent congestion. The flap can be elevated without reference to the dorsal metacarpal artery at the ulnar side of the dorsum of the hand. The flap is an effective option to reconstruct skin defects of the finger, especially the little finger.
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Affiliation(s)
- K Murata
- Department of Orthopaedic Surgery, Nara Medical University, Kashihara-shi, Nara, Japan
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41
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Asada H, Itoh T, Kodera Y, Matsushima A, Hiroto M, Nishimura H, Inada Y. Glutamate synthesis via photoreduction of NADP+ by photostable chlorophyllide coupled with polyethylene-glycol. Biotechnol Bioeng 2001; 76:86-90. [PMID: 11400110 DOI: 10.1002/bit.1029] [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: 11/11/2022]
Abstract
Chlorophyllide a was coupled with alpha-(3-aminopropyl)-omega-methoxypoly(oxyethylene) (PEG-NH2) to form a PEG-chlorophyllide conjugate through an acid-amide bond. The conjugate catalyzed the reduction of methylviologen in the presence of 2-mercaptoethanol. It also catalyzed the photoreduction of NADP+ or NAD+ in the presence of ascorbate as an electron donor and ferredoxin-NADP+ reductase as the coupling enzyme. Utilizing the reducing power of NADPH generated by PEG-chlorophyllide conjugate under illumination, glutamate was synthesized from 2-oxoglutarate and NH4+ in the presence of glutamate dehydrogenase. PEG-chlorophyllide conjugate was quite stable toward light illumination compared with chlorophyll a. The increase in the molecular weight of PEG in the PEG-chlorophyllide conjugates was accompanied by the enhancement of photostability of the conjugate and also by the increased solubility in the aqueous solution.
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Affiliation(s)
- H Asada
- Toin Human Science and Technology Center and Department of Biomedical Engineering, Toin University of Yokohama, Kurogane-cho, Aoba-ku, Yokohama 225-8502 Japan
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Ito A, Uriu K, Inada Y, Qie YL, Takagi I, Ikeda M, Hashimoto O, Suzuka K, Eto S, Tanaka Y, Kaizu K. Inhibition of neuronal nitric oxide synthase ameliorates renal hyperfiltration in streptozotocin-induced diabetic rat. J Lab Clin Med 2001; 138:177-85. [PMID: 11528370 DOI: 10.1067/mlc.2001.116843] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Systemic inhibition of nitric oxide synthase (NOS) in streptozotocin-induced (STZ-induced) diabetic rats results in decreases in glomerular filtration rate (GFR) and renal plasma flow (RPF) and an increase in renal vascular resistance (RVR). However, the exact isoform of NOS involved in diabetic renal hyperfiltration has not been determined. This study was conducted to clarify whether NO derived from neuronal NOS is involved in diabetic renal hyperfiltration when using a selective inhibitor of neuronal NOS, 7-nitro indazole (7-NI). Continuous infusion of NG-nitro-L -arginine methyl ester (L-NAME) at 5 microg/kg/min ameliorated renal hyperfiltration, decreased RPF, and increased RVR in diabetic rats without affecting the mean arterial pressure (MAP). 7-NI administered intraperitoneally in diabetic rats significantly reduced GFR without affecting MAP, but the renal hyperfiltration was still observed after the administration of 7-NI. The combined administration of L-NAME after 7-NI caused a further decrease in GFR in diabetic rats and ultimately resulted in normalization of GFR. 7-NI did not change any parameters of renal hemodynamics in control rats. Urinary excretion of nitrite/nitrate and cyclic guanosine monophosphate was significantly increased in diabetic rats over values found in control rats. Our results suggested that a local inhibition of NO in the kidney was involved in the amelioration of diabetic renal hyperfiltration and that NO derived from neuronal NOS is involved, at least in part, in renal hyperfiltration in STZ-induced diabetic rats.
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Affiliation(s)
- A Ito
- First Department of Internal Medicine and Kidney Center, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan
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Funahashi S, Inada Y, Inamo M. Dynamic study of metal-ion incorporation into porphyrins based on the dynamic characterization of metal ions and on sitting-atop complex formation. ANAL SCI 2001; 17:917-27. [PMID: 11708094 DOI: 10.2116/analsci.17.917] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [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: 11/23/2022]
Abstract
We succeeded in the detection of the sitting-atop (SAT) copper(II) complex of TPP (5,10,15,20-tetraphenylporphyrin) in acetonitrile (AN) as a solvent with a very low Brønsted basicity, where two pyrrolenine nitrogens in the Cu(II)-SAT complex coordinate to the metal ion and two protons still remain on the pyrrole nitrogens. The structure parameters around the copper(II) ion in the Cu(II)-SAT complex, as determined by a fluorescent EXAFS method, suggest an axially elongated and equatorially distorted six-coordinate geometry. We measured the rates of the formation reaction of the SAT complexes for a series of transition metal(II) ions in AN using the stopped-flow technique. We propose the mechanism where there is a rapid deformation equilibrium of the porphyrin ring prior to the rate-determining step of the bond rupture of a coordinated solvent molecule on the metal(II) ion. Furthermore, we measured the rates of the deprotonation reaction of the Cu(II)-SAT complex by some Brønsted bases and indicated that the rate-determining step is the attack of the base on the proton of the pyrrole nitrogen in the SAT complex. Finally, a unified mechanism relevant to the porphyrin metalation mechanism has been proposed.
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Affiliation(s)
- S Funahashi
- Laboratory of Analytical Chemistry, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan.
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44
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Moro M, Inada Y, Miyata H, Komatsu H, Kojima M, Tsujii H. Effects of dopamine d2 receptor agonists in a pituitary transplantation-induced hyperprolactinaemia/anovulation model in rats. Clin Exp Pharmacol Physiol 2001; 28:651-8. [PMID: 11473532 DOI: 10.1046/j.1440-1681.2001.03495.x] [Citation(s) in RCA: 11] [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: 11/20/2022]
Abstract
1. In the present study, we investigated the effects of hyperprolactinaemia, induced by transplantation of anterior pituitary glands under the kidney capsule in female rats, on the relationship between serum and pituitary concentrations of the gonadotropins and on the oestrous cycle. 2. Rats with pituitary transplants showed increased serum prolactin concentrations and decreased serum concentrations of gonadotropins and increased pituitary concentrations of gonadotropins. Moreover, these rats showed persistent dioestrous and anovulation from 3 to 6 days after transplantation. 3. A single oral administration of cabergoline (at doses between 0.001 and 0.1 mg/kg) dose-dependently inhibited the elevated serum prolactin concentrations in hyperprolactinaemic rats. At 0.1 mg/kg, cabergoline induced a continuous reduction in serum prolactin concentrations for 5 days after administration. Terguride (0.1 mg/kg) and bromocriptine (10 mg/kg) also reduced serum prolactin concentrations at 1 and 3 days after administration. All three dopamine D2 receptor agonists increased serum gonadotropin concentrations and ovarian weight at 3 days after administration. 4. In rats exhibiting anovulation, a single oral administration of any one of the three dopamine D2 receptor agonists dose-dependently restored ovulation and a normal oestrous cycle appeared. Oral administration of cabergoline (0.03 mg/kg) or terguride (0.1 mg/kg) restored ovarian function and abolished the anovulation following a reduction in serum prolactin concentrations. However, bromocriptine (10 mg/kg) did not completely abolish anovulation. Following administration of terguride (0.3 mg/kg) or bromocriptine (30 mg/kg), only one normal oestrous cycle appeared; however, following cabergoline (0.1 mg/kg), two normal oestrous cycles appeared. 5. These results suggest that cabergoline has a potent and long-lasting action as a dopamine D2 receptor agonist and, thus, should be a useful drug for the treatment of galactorrhoea and hyperprolactinaemic amenorrhoea and/or anovulation in humans.
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Affiliation(s)
- M Moro
- Pharmacological Laboratories, Kissei Pharmaceutical Co. Ltd., 4365-1 Kashiwabara, Hotaka-machi, Minamiazumi-gun, Nagano 399-8304, Japan
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Shido T, Yamaguchi A, Suzuki A, Inada Y, Asakura K, Nomura M, Iwasawa Y. DXAFS study on the decarbonylation process of Mo(CO)6 in NaY supercages. J Synchrotron Radiat 2001; 8:628-630. [PMID: 11512875 DOI: 10.1107/s0909049501000589] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 12/28/2000] [Indexed: 05/23/2023]
Abstract
The decarbonylation process of Mo(CO)6 in the NaY supercages was studied by means of a time resolved dispersive XAFS method during temperature programmed decarbonylation. XANES analysis demonstrated that the decarbonylation proceeded through two steps and that a stable intermediate existed between 440-490 K. The curve fitting analysis revealed that the intermediate was a molybdenum monomer subcarbonyl species coordinated by three CO ligands and three oxygen atoms of zeolite framework. Molybdenum dimer subcarbonyl species were not observed. This study demonstrated that DXAFS technique is a powerful method to study the dynamic behaviour of the Mo carbonyl species during decarbonylation process.
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Affiliation(s)
- T Shido
- Department of Chemistry, Graduate School of Science, University of Tokyo, Hongo, Japan
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Yamaguchi A, Inada Y, Shido T, Asakura K, Nomura M, Iwasawa Y. Time-resolved energy-dispersive XAFS study on the reduction process of Cu-ZSM-5 catalysts. J Synchrotron Radiat 2001; 8:654-656. [PMID: 11512884 DOI: 10.1107/s0909049500014552] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 10/17/2000] [Indexed: 05/23/2023]
Abstract
The time-resolved reduction process of copper cations in ZSM-5 during temperature-programmed reduction (300-700 K) was studied by energy dispersive X-ray absorption fine structure (DXAFS). The Cu K-edge DXAFS spectra for isolated Cu2+ species in the channels of ZSM-5 were recorded at an interval of 1 s during the reduction. The curve fitting analysis of the EXAFS data and the XANES analysis revealed that the isolated Cu2+ species in the channels were reduced stepwise. They were reduced to isolated Cu+ species at 400-450 K and the Cu+ species to Cu0 metallic clusters at 550-650 K. Small clusters like Cu4 were initially formed, followed by particle growth. A small part of them went out to the outer surfaces of ZSM-5 during the reduction.
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Affiliation(s)
- A Yamaguchi
- Department of Chemistry, Graduate School of Science, University of Tokyo, Japan
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Inada Y, Tazawa S, Murakami M, Akahane M. KRH-594, a new angiotensin AT1 receptor antagonist, prevents end-organ damage in stroke-prone spontaneously hypertensive/Izm rats. Clin Exp Pharmacol Physiol 2001; 28:206-11. [PMID: 11207677 DOI: 10.1046/j.1440-1681.2001.03430.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
1. In the present study, we examined whether KRH-594, a new angiotensin AT1 receptor antagonist, would stop the progression of renal failure and end-organ damage and improve the survival rate in salt-loaded stroke-prone spontaneously hypertensive rats (SHRSP/Izm). 2. Oral administration of KRH-594 (3 and 10 mg/kg per day) for 11 weeks significantly reduced systolic blood pressure, urinary total protein, blood urea nitrogen, serum creatinine and urinary N-acetyl glucosaminidase and increased creatinine clearance in SHRSP/Izm. 3. In a histological study, KRH-594 (3 and 10 mg/kg per day) significantly improved the glomerulosclerosis, basophilic change and hyalin cast of tubules, proliferation of afferent arterioles and interlobular artery wall scores of the kidney and the cardiac fibrosis scores of the heart in SHRSP/Izm. KRH-594 (3 and 10 mg/kg per day) also significantly inhibited cardiac hypertrophy. 4. KRH-594 (3 and 10 mg/kg per day) prevented death in SHRSP/Izm during the examination period. 5. These results suggest that KRH-594 improves hypertensive complications, such as renal failure, cardiac hypertrophy and thickening of the artery wall, and prevents death in salt-loaded SHRSP/Izm.
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Affiliation(s)
- Y Inada
- Pharmacology Laboratory, Kissei Pharmaceutical Co. Ltd, Hotaka, Nagano, Japan.
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Saito T, Kumagai Y, Hiramatsu T, Kurosawa M, Sato T, Habu S, Mitsui K, Kodera Y, Hiroto M, Matsushima A, Inada Y, Nishimura H. Immune tolerance induced by polyethylene glycol-conjugate of protein antigen: clonal deletion of antigen-specific Th-cells in the thymus. J Biomater Sci Polym Ed 2001; 11:647-56. [PMID: 10981679 DOI: 10.1163/156856200743922] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Polyethylene glycol (PEG) conjugates of protein antigens induce antigen-specific immune tolerance of helper T (Th)-cells. However, the mechanism of this Th-cell tolerance has remained unelucidated. Using transgenic mice with ovalbumin (OVA)-specific T-cell receptor (TCR) genes, we examined the response of OVA-specific Th-cells towards tolerogenic PEG-conjugate of OVA in vitro and in vivo. When stimulated with PEG--OVA in vitro, transgenic OVA-specific Th-cells proliferated and produced interleukin 2, the levels of which were comparable to those induced by unmodified OVA. In contrast, PEG--OVA administered into the circulation of transgenic mice induced unresponsiveness in peripheral OVA-specific Th-cells. Moreover, in the thymus of these transgenic mice, the frequency of immature CD4+CD8+ (double positive) thymocytes was reduced. A similar phenomenon was not observed in transgenic mice treated with unmodified OVA. As autoreactive T-cells are known to be clonally deleted at the immature double positive stage in the thymus. Th-cell tolerance induced by PEG--protein antigens is at least in part mediated by central tolerance in the thymus, and is likely caused by the markedly enhanced stability of PEG--protein conjugates in the circulatory system.
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Affiliation(s)
- T Saito
- Department of Biomedical Engineering, Toin University of Yokohama, Japan
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Abstract
A radial thenar flap combined with radial forearm flap was used for the reconstruction of the ipsilateral thumb in four patients. Vascular supply of the combined flap was based on the radial artery and extending the vascular pedicle to the superficial palmar branch of the radial artery. The flap was sensated by the palmar branch of the superficial radial nerve. The size of the flap averaged 15 x 5 cm and the innervated region of the thenar eminence was an area approximately 5 x 3 cm located over the proximal parts of the abductor pollicis brevis and opponens pollicis muscles. The flap was transferred as a free flap in three patients and as an advancement flap in one patient. The flaps survived completely without complications. Satisfactory restoration of sensation was achieved in the flap area, as shown by 6 mm of average moving two-point discrimination. This combined flap may be a feasible reconstructive option for large palmar defects of the fingers such as degloving injuries.
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Affiliation(s)
- S Omokawa
- Department of Orthopedics at Ishinkai-Yao General Hospital, Osaka, Japan
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Inada Y, Hotta N, Kuwabara H, Funahashi S. Spectrophotometric analysis of 5-coordinate cobalt(II) species for ligand substitution of hexakis(acetonitrile)cobalt(II) with bulky 1,1,3,3-tetramethylurea in noncoordinating nitromethane. ANAL SCI 2001; 17:187-91. [PMID: 11993661 DOI: 10.2116/analsci.17.187] [Citation(s) in RCA: 11] [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: 11/23/2022]
Abstract
The ligand substitution reaction of [Co(an)6]2+ (an = acetonitrile) with 1,1,3,3-tetramethylurea (TMU) in the noncoordinating solvent, nitromethane, was spectrophotometrically investigated by titration. The observed spectral changes were analyzed using a model with the four steps of ligand substitution. The component complexes involved in the substitution were found to be 6-coordinate [Co(an)6]2+ and [Co(an)5(tmu)]2+, 5-coordinate [Co(an)3(tmu)2]2+ and [Co(an)2(tmu)3]2+, and 4-coordinate [Co(tmu)4]2+. The logarithmic values of the stepwise equilibrium constant are 2.17 +/- 0.26, 1.06 +/- 0.15, 1.19 +/- 0.06, and -0.4 +/- 0.4 at 25 degrees C. The decrease in the coordination number of the Co(II) ion from 6 to 5 during the formation of [Co(an)3(tmu)2]2+ and from 5 to 4 during the formation of [Co(tmu)4]2+ is ascribed to the steric repulsion between the coordinating bulky TMU molecules.
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Affiliation(s)
- Y Inada
- Research Center for Materials Science, Nagoya University, Japan.
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