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Effects of empagliflozin on progression of chronic kidney disease: a prespecified secondary analysis from the empa-kidney trial. Lancet Diabetes Endocrinol 2024; 12:39-50. [PMID: 38061371 PMCID: PMC7615591 DOI: 10.1016/s2213-8587(23)00321-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Sodium-glucose co-transporter-2 (SGLT2) inhibitors reduce progression of chronic kidney disease and the risk of cardiovascular morbidity and mortality in a wide range of patients. However, their effects on kidney disease progression in some patients with chronic kidney disease are unclear because few clinical kidney outcomes occurred among such patients in the completed trials. In particular, some guidelines stratify their level of recommendation about who should be treated with SGLT2 inhibitors based on diabetes status and albuminuria. We aimed to assess the effects of empagliflozin on progression of chronic kidney disease both overall and among specific types of participants in the EMPA-KIDNEY trial. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA), and included individuals aged 18 years or older with an estimated glomerular filtration rate (eGFR) of 20 to less than 45 mL/min per 1·73 m2, or with an eGFR of 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher. We explored the effects of 10 mg oral empagliflozin once daily versus placebo on the annualised rate of change in estimated glomerular filtration rate (eGFR slope), a tertiary outcome. We studied the acute slope (from randomisation to 2 months) and chronic slope (from 2 months onwards) separately, using shared parameter models to estimate the latter. Analyses were done in all randomly assigned participants by intention to treat. EMPA-KIDNEY is registered at ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and then followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroups of eGFR included 2282 (34·5%) participants with an eGFR of less than 30 mL/min per 1·73 m2, 2928 (44·3%) with an eGFR of 30 to less than 45 mL/min per 1·73 m2, and 1399 (21·2%) with an eGFR 45 mL/min per 1·73 m2 or higher. Prespecified subgroups of uACR included 1328 (20·1%) with a uACR of less than 30 mg/g, 1864 (28·2%) with a uACR of 30 to 300 mg/g, and 3417 (51·7%) with a uACR of more than 300 mg/g. Overall, allocation to empagliflozin caused an acute 2·12 mL/min per 1·73 m2 (95% CI 1·83-2·41) reduction in eGFR, equivalent to a 6% (5-6) dip in the first 2 months. After this, it halved the chronic slope from -2·75 to -1·37 mL/min per 1·73 m2 per year (relative difference 50%, 95% CI 42-58). The absolute and relative benefits of empagliflozin on the magnitude of the chronic slope varied significantly depending on diabetes status and baseline levels of eGFR and uACR. In particular, the absolute difference in chronic slopes was lower in patients with lower baseline uACR, but because this group progressed more slowly than those with higher uACR, this translated to a larger relative difference in chronic slopes in this group (86% [36-136] reduction in the chronic slope among those with baseline uACR <30 mg/g compared with a 29% [19-38] reduction for those with baseline uACR ≥2000 mg/g; ptrend<0·0001). INTERPRETATION Empagliflozin slowed the rate of progression of chronic kidney disease among all types of participant in the EMPA-KIDNEY trial, including those with little albuminuria. Albuminuria alone should not be used to determine whether to treat with an SGLT2 inhibitor. FUNDING Boehringer Ingelheim and Eli Lilly.
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Yamada N, Yamagata K, Yamaguchi M, Yamaji Y, Yamamoto A, Yamamoto S, Yamamoto S, Yamamoto T, Yamanaka A, Yamano T, Yamanouchi Y, Yamasaki N, Yamasaki Y, Yamasaki Y, Yamashita C, Yamauchi T, Yan Q, Yanagisawa E, Yang F, Yang L, Yano S, Yao S, Yao Y, Yarlagadda S, Yasuda Y, Yiu V, Yokoyama T, Yoshida S, Yoshidome E, Yoshikawa H, Young A, Young T, Yousif V, Yu H, Yu Y, Yuasa K, Yusof N, Zalunardo N, Zander B, Zani R, Zappulo F, Zayed M, Zemann B, Zettergren P, Zhang H, Zhang L, Zhang L, Zhang N, Zhang X, Zhao J, Zhao L, Zhao S, Zhao Z, Zhong H, Zhou N, Zhou S, Zhu D, Zhu L, Zhu S, Zietz M, Zippo M, Zirino F, Zulkipli FH. Impact of primary kidney disease on the effects of empagliflozin in patients with chronic kidney disease: secondary analyses of the EMPA-KIDNEY trial. Lancet Diabetes Endocrinol 2024; 12:51-60. [PMID: 38061372 DOI: 10.1016/s2213-8587(23)00322-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND The EMPA-KIDNEY trial showed that empagliflozin reduced the risk of the primary composite outcome of kidney disease progression or cardiovascular death in patients with chronic kidney disease mainly through slowing progression. We aimed to assess how effects of empagliflozin might differ by primary kidney disease across its broad population. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA). Patients were eligible if their estimated glomerular filtration rate (eGFR) was 20 to less than 45 mL/min per 1·73 m2, or 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher at screening. They were randomly assigned (1:1) to 10 mg oral empagliflozin once daily or matching placebo. Effects on kidney disease progression (defined as a sustained ≥40% eGFR decline from randomisation, end-stage kidney disease, a sustained eGFR below 10 mL/min per 1·73 m2, or death from kidney failure) were assessed using prespecified Cox models, and eGFR slope analyses used shared parameter models. Subgroup comparisons were performed by including relevant interaction terms in models. EMPA-KIDNEY is registered with ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroupings by primary kidney disease included 2057 (31·1%) participants with diabetic kidney disease, 1669 (25·3%) with glomerular disease, 1445 (21·9%) with hypertensive or renovascular disease, and 1438 (21·8%) with other or unknown causes. Kidney disease progression occurred in 384 (11·6%) of 3304 patients in the empagliflozin group and 504 (15·2%) of 3305 patients in the placebo group (hazard ratio 0·71 [95% CI 0·62-0·81]), with no evidence that the relative effect size varied significantly by primary kidney disease (pheterogeneity=0·62). The between-group difference in chronic eGFR slopes (ie, from 2 months to final follow-up) was 1·37 mL/min per 1·73 m2 per year (95% CI 1·16-1·59), representing a 50% (42-58) reduction in the rate of chronic eGFR decline. This relative effect of empagliflozin on chronic eGFR slope was similar in analyses by different primary kidney diseases, including in explorations by type of glomerular disease and diabetes (p values for heterogeneity all >0·1). INTERPRETATION In a broad range of patients with chronic kidney disease at risk of progression, including a wide range of non-diabetic causes of chronic kidney disease, empagliflozin reduced risk of kidney disease progression. Relative effect sizes were broadly similar irrespective of the cause of primary kidney disease, suggesting that SGLT2 inhibitors should be part of a standard of care to minimise risk of kidney failure in chronic kidney disease. FUNDING Boehringer Ingelheim, Eli Lilly, and UK Medical Research Council.
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Honma Y, Shibata M, Morino K, Koya Y, Hayashi T, Ogino N, Kusanaga M, Oe S, Miyagawa K, Abe S, Tabaru A, Harada M. Impact of Interferon-Free Direct-Acting Antivirals on the Incidence of Extrahepatic Malignancies in Patients with Chronic Hepatitis C. Dig Dis Sci 2023; 68:685-698. [PMID: 36100828 DOI: 10.1007/s10620-022-07686-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 08/29/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND The incidence of extrahepatic malignancies (EHMs) after hepatitis C virus (HCV) eradication by interferon (IFN)-based and IFN-free direct-acting antivirals (DAAs) treatment remains unclear. AIMS The aim was to evaluate the cumulative incidence of EHMs diagnosed for the first time after the antiviral treatments. METHODS We analyzed a total 527 patients with chronic HCV infection and without prior history of any malignancies who achieved sustained virological response by antiviral treatments, including IFN-based (n = 242) or IFN-free DAAs (n = 285). The baseline predictors for EHM occurrence were analyzed using Cox regression analysis. RESULTS Thirty-two patients were diagnosed with EHMs, 14 in IFN-based and 18 in IFN-free DAAs, respectively. The total duration of follow-up was 1,796 person-years in IFN-based and 823 person-years in IFN-free DAAs. The incidence of EHMs in IFN-based and IFN-free DAAs was 7.8 and 21.9 per 1,000 person-years, respectively. The cumulative incidence of EHMs was significantly higher in IFN-free DAAs than IFN-based (p = 0.002). IFN-free DAAs was a single independent predictor for incidence of EHMs (p = 0.012). As for gender, the incidence of EHMs was significantly higher in IFN-free DAAs only in the female cohort (p = 0.002). After propensity score matching, IFN-free DAAs was a single independent predictor for incidence of EHMs in the female patients (p = 0.045). CONCLUSIONS The incidence of EHMs after HCV eradication is higher in IFN-free DAAs than IFN-based regimens, especially in female patients. We should carefully follow-up not only HCC but also EHMs after IFN-free DAAs regimens.
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Affiliation(s)
- Yuichi Honma
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan.
| | - Michihiko Shibata
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Kahori Morino
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Yudai Koya
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
- Department of Gastroenterology, Moji Medical Center, 3-1 Higashiminato-machi, Moji-ku, Kitakyushu, 801-8502, Japan
| | - Tsuguru Hayashi
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Noriyoshi Ogino
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Masashi Kusanaga
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Shinji Oe
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Koichiro Miyagawa
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Shintaro Abe
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Akinari Tabaru
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
- Department of Gastroenterology, Wakamatsu Hospital of the University of Occupational and Environmental Health, 1-17-1 Hama-machi, Wakamatsu-ku, Kitakyushu, 800-0024, Japan
| | - Masaru Harada
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
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Tanimoto A, Shibata M, Honma Y, Morino K, Kusanaga M, Abe S, Harada M. Two Cases with Isolated Splenic Sarcoidosis Diagnosed by an Ultrasound-guided Fine-needle Aspiration Biopsy. Intern Med 2022. [PMID: 36450462 PMCID: PMC10400400 DOI: 10.2169/internalmedicine.0409-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Asymptomatic splenic nodules were detected incidentally in two middle-aged women at an annual checkup. They showed no abnormalities on laboratory tests, but imaging studies revealed splenic nodules. No other localized lesions were found. Splenic nodules were hypoechoic on ultrasonography (US), hypovascular on contrast-enhanced computed tomography, and showed a low intensity on T2-weighted magnetic resonance imaging. We performed US-guided percutaneous aspiration biopsies using 21-gauge needles without complications, including bleeding. Pathological specimens showed noncaseating granulomas, so both patients were diagnosed with isolated splenic sarcoidosis. A US-guided fine-needle aspiration biopsy is a safe and useful method for diagnosing splenic nodules.
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Affiliation(s)
- Aya Tanimoto
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Michihiko Shibata
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Yuichi Honma
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Kahori Morino
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Masashi Kusanaga
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Shintaro Abe
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Masaru Harada
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
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Honma Y, Shibata M, Gohda T, Matsumiya H, Kumamoto K, Miyama A, Morino K, Koya Y, Taira A, Shinohara S, Hayashi T, Kusanaga M, Oe S, Miyagawa K, Abe S, Tanaka F, Harada M. Rapid Progression of Liver Fibrosis Induced by Acute Liver Injury Due to Immune-related Adverse Events of Atezolizumab. Intern Med 2021; 60:1847-1853. [PMID: 33456046 PMCID: PMC8263175 DOI: 10.2169/internalmedicine.6535-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
A 72-year-old woman with advanced lung cancer had received systemic chemotherapy including atezolizumab. About three months after the initial administration of atezolizumab, her liver enzyme levels increased. The histopathological findings of the initial liver biopsy revealed acute inflammatory infiltrate, predominantly CD3+, CD4+ and CD8+ T lymphocytes, in the hepatic lobules. We diagnosed her with atezolizumab-induced immune-related acute hepatitis. Oral corticosteroid therapy successfully improved the elevation of serum aminotransferases. A sequential liver biopsy demonstrated the rapid progression of liver fibrosis. Because hepatocellular carcinoma occurs most often in advanced cases of chronic liver disease, we should pay close attention to immune-related acute hepatic injury when treating patients with advanced liver diseases using atezolizumab.
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Affiliation(s)
- Yuichi Honma
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Michihiko Shibata
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Tomonori Gohda
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Hiroki Matsumiya
- Second Department of Surgery, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Keiichiro Kumamoto
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
- Department of Pathology, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Aya Miyama
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Kahori Morino
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Yudai Koya
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
- Department of Gastroenterology, Moji Medical Center, Japan
| | - Akihiro Taira
- Second Department of Surgery, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Shinji Shinohara
- Second Department of Surgery, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Tsuguru Hayashi
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Masashi Kusanaga
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Shinji Oe
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Koichiro Miyagawa
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Shintaro Abe
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Fumihiro Tanaka
- Second Department of Surgery, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Masaru Harada
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
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Abstract
A 69-year-old man was diagnosed with a liver abscess and received antibiotics at a local hospital. He was referred to our hospital due to a persistent fever. He had hepatic masses protruding from the liver surface toward the transverse colon. We reached a diagnosis of inflammatory pseudotumor (IPT) by a percutaneous liver biopsy. Colonoscopy showed direct invasion of IPT to the colon. His condition improved by the intravenous administration of antibiotics. Hepatic IPT is often misdiagnosed as a malignant tumor. We should consider IPT when we encounter hepatic tumors, and a percutaneous liver biopsy is useful for avoiding unnecessary excessive treatments.
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Affiliation(s)
- Naoki Imazu
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Michihiko Shibata
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Yudai Koya
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Kahori Morino
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Yuichi Honma
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Michio Senju
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Tatsuyuki Watanabe
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Masaru Harada
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
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Oe S, Honma Y, Yabuki K, Morino K, Kumamoto K, Hayashi T, Kusanaga M, Ogino N, Minami S, Shibata M, Abe S, Harada M. Importance of a Liver Biopsy in the Management of Wilson Disease. Intern Med 2020; 59:77-81. [PMID: 31511488 PMCID: PMC6995705 DOI: 10.2169/internalmedicine.3440-19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
A 37-year-old Wilson disease patient treated with D-penicillamine visited our hospital for the evaluation of his liver function. Laboratory data showed a low serum copper level and ceruloplasmin. The ratio of urinary copper to urinary creatinine in a spot urinary analysis after 4 days' cessation of D-penicillamine was under 0.1. We concluded that the copper chelation was excessive and changed D-penicillamine to zinc acetate. However, his liver function test results did not normalize. We performed a liver biopsy and discovered a high copper content. The liver dysfunction was improved after resuming chelating therapy. Accurate measurement of the hepatic copper content via a biopsy is important for the adequate management of this disease.
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Affiliation(s)
- Shinji Oe
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Yuichi Honma
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Kei Yabuki
- Department of Pathology and Oncology, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Kahori Morino
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Keiichiro Kumamoto
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
- Department of Pathology and Cell Biology, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Tsuguru Hayashi
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Masashi Kusanaga
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Noriyoshi Ogino
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Sota Minami
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Michihiko Shibata
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Shintaro Abe
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - Masaru Harada
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
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Morino K, Honma Y, Kumei S, Watanabe T, Kume K, Yoshikawa I, Harada M. Recombinant Thrombomodulin Used to Successfully Treat Cronkhite-Canada Syndrome with Disseminated Intravascular Coagulation due to Sepsis in a Compromised Patient. Intern Med 2018; 57:3079-3085. [PMID: 29877275 PMCID: PMC6262703 DOI: 10.2169/internalmedicine.0633-17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cronkhite-Canada syndrome (CCS) is a rare non-inherited disease characterized by gastrointestinal polyposis, chronic diarrhea, ectodermal dysplasia, skin hyperpigmentation, hair loss and nail atrophy. Although the efficacy of corticosteroid and immunomodulatory agents has been demonstrated, no standard therapy regimen has been established, and the prognosis of CCS is still poor due to various complications. We here in report a CCS patient complicated with severe sepsis and disseminated intravascular coagulation who was successfully treated by combined modality therapies, including recombinant human soluble thrombomodulin.
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Affiliation(s)
- Kahori Morino
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Yuichi Honma
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Shinsuke Kumei
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Tatsuyuki Watanabe
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Keiichiro Kume
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Ichiro Yoshikawa
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
| | - Masaru Harada
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
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Fujiwara S, Yokokawa Y, Morino K, Hayasaka K, Kawabata M, Shimizu T. Chronic hepatitis E: a review of the literature. J Viral Hepat 2014; 21:78-89. [PMID: 24383921 DOI: 10.1111/jvh.12156] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [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: 05/25/2013] [Accepted: 07/02/2013] [Indexed: 12/14/2022]
Abstract
In 1978, the first case of hepatitis E was identified as non-A, non-B hepatitis. Hepatitis E virus (HEV) infection is believed to be one of the common causes of enterically transmitted acute hepatitis in developing countries and is rare in developed countries, except in patients with a history of travel. However, an increasing number of chronic HEV infection cases have recently been reported in developed countries. In these countries, immunosuppressed patients with HEV infection, such as organ transplant recipients, human immunodeficiency virus (HIV)-infected patients or patients with haematological malignancies, could develop chronic hepatitis E (CHE) infection. Approximately 60% of HEV infections in immunocompromised patients after solid organ transplantation evolve to CHE without antiviral treatment. Clinical manifestations of CHE are often nonspecific symptoms. Many patients with CHE infection are asymptomatic, but some have jaundice, fatigue, abdominal pain, fever and asthenia. Several extrahepatic manifestations have also been reported. Although chronic HEV infection can result in progressive severe liver failure and cirrhosis, diagnosis is often controversial because of the lack of specific diagnostic criteria. Many CHE cases are diagnosed by HEV RNA-positive serum or stool for >6 months. Immunosuppressive drugs, interferon-alpha and ribavirin have been used for treatment. Diagnostic reverse-transcription polymerase chain reaction is useful for estimating treatment efficacy. Preventive measures for HEV infection have been discussed, while systematic guidelines have not yet been reported.
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Affiliation(s)
- S Fujiwara
- Department of Medicine, Tohoku University School of Medicine, Sendai, Miyagi, Japan
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Morino K, Kobayashi M, Yamada Y, Yamanouchi S, Tsujimoto Y, Takeda K, Sato S, Kimura S, Mita N, Sato M, Kushimoto S, Endo S. Cases of tetanus after the Japan crisis 2011. Crit Care 2012. [PMCID: PMC3363480 DOI: 10.1186/cc10669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Takeyama N, Noguchi H, Morino K, Obata T, Sakamoto T, Tamai F, Ishikura H, Kase Y, Kobayashi M, Takahashi Y. Beneficial effects of early hemoperfusion with a polymyxin B fibre column on septic shock. Crit Care 2009. [PMCID: PMC4084172 DOI: 10.1186/cc7450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Fukushima H, Mizutani M, Imamura K, Morino K, Kobayashi J, Okumura K, Tsumoto K, Yoshimura T. Development of a Novel Preparation Method of Recombinant Proteoliposomes Using Baculovirus Gene Expression Systems. J Biochem 2008; 144:763-70. [DOI: 10.1093/jb/mvn125] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Morino K, Katsumi H, Akahori Y, Iba Y, Shinohara M, Ukai Y, Kohara Y, Kurosawa Y. Antibody fusions with fluorescent proteins: a versatile reagent for profiling protein expression. J Immunol Methods 2001; 257:175-84. [PMID: 11687251 DOI: 10.1016/s0022-1759(01)00462-8] [Citation(s) in RCA: 54] [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: 11/22/2022]
Abstract
We developed a system by which antibodies, fused to fluorescent proteins with different wavelengths, can be prepared within a month against various antigens. An antibody library composed of a large number of single-chain Fv-CL fragment was constructed by means of a phage-display system. The constructs were designed to facilitate changing of the protein forms by simple enzyme manipulation. In the present study, we adopted a molecular form of antibody in which a single-chain Fv-CL fragment is fused with a green fluorescent protein (GFP) or red fluorescent protein (RFP). In addition, a His-tag was inserted between CL and GFP (or RFP). We describe the utility of this system using Caenorhabditis elegans embryo as a model.
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Affiliation(s)
- K Morino
- Institute for Antibody, Fujita Health University, Toyoake, Aichi 470-1192, Japan
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14
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Ubuka T, Abe T, Kajikawa R, Morino K. Determination of hydrogen sulfide and acid-labile sulfur in animal tissues by gas chromatography and ion chromatography. J Chromatogr B Biomed Sci Appl 2001; 757:31-7. [PMID: 11419746 DOI: 10.1016/s0378-4347(01)00046-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A sensitive and reliable method was developed for the determination of hydrogen sulfide and acid-labile sulfur (ALS) in animal tissues using gas chromatography with flame photometric detector (GC-FPD) and ion chromatography (IC). Hydrogen sulfide trapped in alkaline solution was determined by GC-FPD as hydrogen sulfide or by IC as sulfate after oxidation with hydrogen peroxide. Sodium sulfide used as a source of hydrogen sulfide was standardized by IC. Fresh rat liver and heart tissues contained 112.2+/-23.0 and 274.1+/-34.6 nmol/g of ALS respectively. Free hydrogen sulfide was not detected.
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Affiliation(s)
- T Ubuka
- Department of Clinical Nutrition, Kawasaki University of Medical Welfare, Kurashiki, Okayama, Japan.
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15
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Morino K, Maegawa H, Fujita T, Takahara N, Egawa K, Kashiwagi A, Kikkawa R. Insulin-induced c-Jun N-terminal kinase activation is negatively regulated by protein kinase C delta. Endocrinology 2001; 142:2669-76. [PMID: 11356718 DOI: 10.1210/endo.142.6.8189] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We investigated the role of protein kinase C (PKC) in insulin-induced c-Jun N-terminal kinase (JNK) activation in rat 1 fibroblasts expressing human insulin receptors. Insulin treatment led to increased SAPK/ERK kinase 1 (SEK1) phosphorylation, and then stimulated JNK activity in a dose- and time-dependent manner, as measured either by a solid-phase kinase assay using glutathione S-transferase (GST)-c-Jun fusion protein as a substrate, or by quantitation of the levels of phosphorylated JNK by Western blotting using anti-phospho-JNK antibody. Insulin-induced JNK activation was potentiated by either preincubating cells with 2 nM GF109203X (PKC inhibitor) or down-regulation of PKC by overnight treatment with 100 nM tetradecanoyl phorbol acetate. In contrast, brief preincubation with 100 nM tetradecanoyl phorbol acetate inhibited the insulin- induced JNK activation. Furthermore, we found that 5 microM rottlerin, a PKCdelta inhibitor, enhanced insulin-induced JNK activation, but a PKCbeta inhibitor, LY333531, had no effect. Consistent with these findings, overexpression of PKCdelta led to decreased insulin-induced JNK activation, whereas overexpression of PKCbeta had no effect. Although overexpression of wild-type PKCdelta attenuated insulin-induced JNK activation, a kinase-dead PKCdelta mutant did not cause such attenuation. Finally, we found that the magnitude of insulin-induced JNK activation was inversely correlated with the expression level of PKCdelta among different cell lines. In conclusion, the expression of PKCdelta may negatively regulate insulin-induced JNK activation.
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Affiliation(s)
- K Morino
- Third Department of Medicine, Shiga University of Medical Science, Seta, Otsu, Shiga 520-2192, Japan
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16
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Egawa K, Maegawa H, Shimizu S, Morino K, Nishio Y, Bryer-Ash M, Cheung AT, Kolls JK, Kikkawa R, Kashiwagi A. Protein-tyrosine phosphatase-1B negatively regulates insulin signaling in l6 myocytes and Fao hepatoma cells. J Biol Chem 2001; 276:10207-11. [PMID: 11136729 DOI: 10.1074/jbc.m009489200] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Insulin signaling is regulated by tyrosine phosphorylation of the signaling molecules, such as the insulin receptor and insulin receptor substrates (IRSs). Therefore, the balance between protein-tyrosine kinases and protein-tyrosine phosphatase activities is thought to be important in the modulation of insulin signaling in insulin-resistant states. We thus employed the adenovirus-mediated gene transfer technique, and we analyzed the effect of overexpression of a wild-type protein-tyrosine phosphatase-1B (PTP1B) on insulin signaling in both L6 myocytes and Fao cells. In both cells, PTP1B overexpression blocked insulin-stimulated tyrosine phosphorylation of the insulin receptor and IRS-1 by more than 70% and resulted in a significant inhibition of the association between IRS-1 and the p85 subunit of phosphatidylinositol 3-kinase and Akt phosphorylation as well as mitogen-activated protein kinase phosphorylation. Moreover, insulin-stimulated glycogen synthesis was also inhibited by PTP1B overexpression in both cells. These effects were specific for insulin signaling, because platelet-derived growth factor (PDGF)-stimulated PDGF receptor tyrosine phosphorylation and Akt phosphorylation were not inhibited by PTP1B overexpression. The present findings demonstrate that PTP1B negatively regulates insulin signaling in L6 and Fao cells, suggesting that PTP1B plays an important role in insulin resistance in muscle and liver.
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Affiliation(s)
- K Egawa
- Third Department of Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
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17
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Ohhashi J, Miyamoto M, Ishikawa S, Hashizume Y, Nishido T, Matsuyama K, Morino K, Miyazaki Y. Crescentic glomerulonephritis with positive antineutrophil cytoplasmic autoantibody specific for myeloperoxidase associated with autoimmune hemolytic anemia and thrombocytopenic purpura. Intern Med 2000; 39:650-4. [PMID: 10939540 DOI: 10.2169/internalmedicine.39.650] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 41-year-old woman was admitted to the hospital with severe uremia, hemolytic anemia, and thrombocytopenic purpura. Emergency hemodialysis with plasmapheresis was started in view of consideration of hemolytic uremic syndrome (HUS), which resulted in improvement of renal function and platelet count. Positive antineutrophil cytoplasmic autoantibody specific for myeloperoxidase (MPO-ANCA) suggested crescentic glomerulonephritis, which was pathologically evidenced by renal biopsy. The diagnosis of MPO-ANCA associated crescentic glomerulonephritis with autoimmune hemolytic anemia (AIHA) and thrombocytopenic purpura were confirmed. Three courses of steroid pulse therapy with heparin were successfully performed, followed by oral prednisolone and warfarin. Such a case has not been previously reported to our knowledge.
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Affiliation(s)
- J Ohhashi
- Department of Internal Medicine, Misato Kenwa Hospital, Saitama
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18
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Maegawa H, Hasegawa M, Sugai S, Obata T, Ugi S, Morino K, Egawa K, Fujita T, Sakamoto T, Nishio Y, Kojima H, Haneda M, Yasuda H, Kikkawa R, Kashiwagi A. Expression of a dominant negative SHP-2 in transgenic mice induces insulin resistance. J Biol Chem 1999; 274:30236-43. [PMID: 10514516 DOI: 10.1074/jbc.274.42.30236] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.1] [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: 02/03/2023] Open
Abstract
To elucidate the roles of SHP-2, we generated transgenic (Tg) mice expressing a dominant negative mutant lacking protein tyrosine phosphatase domain (DeltaPTP). On examining two lines of Tg mice identified by Southern blot, the transgene product was expressed in skeletal muscle, liver, and adipose tissues, and insulin-induced association of insulin receptor substrate 1 with endogenous SHP-2 was inhibited, confirming that DeltaPTP has a dominant negative property. The intraperitoneal glucose loading test demonstrated an increase in blood glucose levels in Tg mice. Plasma insulin levels in Tg mice after 4 h fasting were 3 times greater with comparable blood glucose levels. To estimate insulin sensitivity by a constant glucose, insulin, and somatostatin infusion, steady state blood glucose levels were higher, suggesting the presence of insulin resistance. Furthermore, we observed the impairment of insulin-stimulated glucose uptake in muscle and adipocytes in the presence of physiological concentrations of insulin. Moreover, tyrosine phosphorylation of insulin receptor substrate-1 and stimulation of phosphatidylinositol 3-kinase and Akt kinase activities by insulin were attenuated in muscle and liver. These results indicate that the inhibition of endogenous SHP-2 function by the overexpression of a dominant negative mutant may lead to impaired insulin sensitivity of glucose metabolism, and thus SHP-2 may function to modulate insulin signaling in target tissues.
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Affiliation(s)
- H Maegawa
- Third Department of Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
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19
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Maegawa H, Obata T, Shibata T, Fujita T, Ugi S, Morino K, Nishio Y, Kojima H, Hidaka H, Haneda M, Yasuda H, Kikkawa R, Kashiwagi A. A new antidiabetic agent (JTT-501) rapidly stimulates glucose disposal rates by enhancing insulin signal transduction in skeletal muscle. Diabetologia 1999; 42:151-9. [PMID: 10064094 DOI: 10.1007/s001250051133] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A newly synthesized antidiabetic agent, JTT-501 is an isoxazolidinedione rather than a thiazolidinedione. An oral dose of JTT-501 (100 mg x kg(-1) x day(-1)) given to 12-week-old male Zucker fatty rats for 7 days led to the amelioration of both hyperinsulinaemia (40% of non-treated) and hypertriglyceridaemia (23% of non-treated) as well as a 2.4-fold increased insulin sensitivity as determined by a euglycaemic insulin clamp. In our study, we further evaluated the acute effect of JTT-501 on both the glucose infusion rates (GIR) and insulin signalling in skeletal muscle. Male Sprague-Dawley (SD) rats aged 10 weeks were injected intravenously with JTT-501 (5 mg/kg) and then a euglycaemic insulin clamp was initiated and glucose infusion rates monitored for 150 min. We found that this treatment increased the glucose infusion rate by 33% during the last 30 min in SD rats. After the clamp had been initiated for 30 min, the insulin-stimulated phosphatidylinositol 3-kinase (PI3-kinase) activities co-immunoprecipitated with insulin receptor substrate 1 (IRS-1) were also enhanced, resulting in increased glycogen synthase activities in the soleus muscles. Treatment with JTT-501 also enhanced the phosphorylation of insulin receptors and insulin receptor-substrate 1 rapidly as well as the phosphatidylinositol 3-kinase activities, which were stimulated by a bolus injection of insulin. Similarly, JTT-501 stimulated the glucose infusion rate by 30% and enhanced insulin signalling in Zucker fatty rats. In conclusion, a newly developed isoxazolidinedione, JTT-501, rapidly potentiates the insulin sensitivity of skeletal muscle by enhancing insulin signalling and could be useful for the treatment of insulin-resistant diabetic subjects.
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Affiliation(s)
- H Maegawa
- Third Department of Medicine, Shiga University of Medical Science, Seta, Japan
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20
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Abstract
In rice, silencing of the aleurone-specific Ltp2-gus transgene, causing easily detectable staining patterns on the grain surface, offers a convenient tool to study quantitative aspects of gene silencing in monocots. In this paper we analyzed phenotypes, occurrence, inheritance and environmental effects on the silencing. We also report on the cloning of transgenes, determination of their structure and analysis of transcripts from the transgene loci. The results show that various patterns of silencing appeared in the R2 generation at which most of the transgenes became homozygous and that they were inherited for five generations. In addition, silencing independently occurred in three generations and reversion to full expression was also found. Cloning of transgenes from a silenced L3.3 line demonstrated that this line carried two transgene loci: one carried an intact Ltp2-gus gene and the other carried a rearranged transgene in which part of the gus gene was in the antisense orientation. Analysis of gus transcripts indicated that partial antisense RNA derived from the rearranged transgene was present in silenced lines and was polyadenylated but that it was absent in non-silenced lines. RNA analyses suggested that the Ltp2-gus silencing in the aleurone layer was post-transcriptional and that it may be caused by interaction of partial antisense gus transcripts with normal sense transcripts. Possible involvement of antisense transcripts in post-transcriptional silencing is discussed.
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Affiliation(s)
- K Morino
- Laboratory of Plant Molecular Genetics, Nara Institute of Science and Technology, Ikoma, Japan
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21
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Isshiki M, Morino K, Nakajima M, Okagaki RJ, Wessler SR, Izawa T, Shimamoto K. A naturally occurring functional allele of the rice waxy locus has a GT to TT mutation at the 5' splice site of the first intron. Plant J 1998; 15:133-8. [PMID: 9744101 DOI: 10.1046/j.1365-313x.1998.00189.x] [Citation(s) in RCA: 150] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In cultivated rice two wild-type alleles, Wxa and Wxb, predominate at the waxy locus, which encodes granule-bound starch synthase. The activity of Wxa is 10-fold higher than that of Wxb at the level of both protein and mRNA. Wxb has a +1G to T mutation at the 5' splice site of the first intron. Sequence analysis of Wxb transcripts revealed that splicing occurs at the mutant AG/UU site and at two cryptic sites: the first is A/GUU, one base upstream of the original site and the second is AG/GU found approximately 100 bases upstream of the mutant splice site. We introduced single base mutations to the 5' splice sites of both Wxa and Wxb, fused with the gus reporter gene and introduced them into rice protoplasts. Analysis of GUS activities and transcripts indicated that a G to T mutation in Wxa reduced GUS activity and the level of spliced RNA. Conversely, a T to G mutation of Wxb restored GUS activity and the level of spliced RNA to that of wild-type Wxa. These results demonstrated that the low level expression of Wxb results from a single base mutation at the 5' splice site of the first intron. It is of interest that the Wxb allele of rice carrying the G to T mutation of intron 1 has been conserved in the history of rice cultivation because there is a low amylose content of the seed caused by this mutation.
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Affiliation(s)
- M Isshiki
- Laboratory of Plant Molecular Genetics, Nara Institute of Science and Technology, Takayama, Japan
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22
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Saijo M, Sakai Y, Kishino T, Niikawa N, Matsuura Y, Morino K, Tamai K, Taya Y. Molecular cloning of a human protein that binds to the retinoblastoma protein and chromosomal mapping. Genomics 1995; 27:511-9. [PMID: 7558034 DOI: 10.1006/geno.1995.1084] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We have isolated distinct clones for cellular proteins that bind to the retinoblastoma protein by direct screening of cDNA expression libraries using purified pRB as a probe. The total nucleotide sequence of one of these clones, RBQ-3, was determined and found to encode a protein of 66 kDa localized in the nucleus. The RBQ-3 preferentially binds to underphosphorylated pRB. The region used for binding to this protein was mapped to the E1A-binding pocket B of pRB, which has sequence similarity to the general transcription factor TFIIB. We have mapped the gene to 1q32 using polymerase chain reaction analysis on a human-hamster hybrid cell panel and chromosomal fluorescence in situ hybridization.
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Affiliation(s)
- M Saijo
- Biology Division, National Cancer Center Research Institute, Tokyo, Japan
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23
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Yamamoto S, Takemori E, Hasegawa Y, Nakao K, Inukai T, Nomura M, Morino K, Tsuchiyama M, Hasegawa K, Ikeda H. General pharmacology of the novel angiotensin converting enzyme inhibitor benazepril hydrochloride. Effects on central nervous and sensory systems and other functions. Arzneimittelforschung 1991; 41:602-7. [PMID: 1930347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effects of benazepril hydrochloride (CGS 14824 A, CAS 86541-74-4), a novel angiotension I converting enzyme inhibitor, on the central nervous systems, were studied in experimental animals. Benazepril hydrochloride (3 or 10 mg/kg/d, p.o. for 14 days) dose-dependently inhibited the increase in the blood pressure caused by continuous norepinephrine (NE) infusion in spontaneously hypertensive rats (SHR) and suppressed in seizures induced by a monoamine oxidase inhibitor, tranylcypromine in NE infused SHR. Benazepril hydrochloride transiently increased spontaneous motor activity in mice, tended to inhibit acetic acid-induced writhing in mice and decreased fast wave sleep and slow wave deep sleep on EEG in cats at a high dose of 100 mg/kg p.o. However, benazepril hydrochloride at the same dose showed no effect on other central nervous and sensory systems in experimental animals.
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Affiliation(s)
- S Yamamoto
- Pre-clinical Research Department, Ciba-Geigy Limited, Takarazuka, Japan
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24
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Toteno I, Haguro S, Furukawa S, Morinaga T, Morino K, Fujii S, Yamakita O. [Reproductive and developmental toxicity study of mofezolac (N-22) (2)--Study by oral administration of N-22 during the period of fetal organogenesis in rats]. J Toxicol Sci 1990; 15 Suppl 2:165-208. [PMID: 2231789 DOI: 10.2131/jts.15.supplementii_165] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The teratogenicity of mofezolac (N-22), a new developed analgesic and anti-inflammatory agent, was investigated in rats. N-22 was given orally to pregnant rats of the Jcl: Wistar strain (30 rats per group) at dose levels of 10, 50, 100 and 150 mg/kg/day from days 7 to 17 of gestation. Caesarean sections were performed on 20 dams per group on day 20 of gestation and their fetuses were examined for external, visceral and skeletal abnormalities. The remaining 10 dams per group were allowed to deliver and their offspring were examined for growth and reproductive performance. Results were as follows. 1. Effects on F0 generation At 150 mg/kg, eleven out of the 30 dams exhibited decreased motor activity, pale eyes, unkempt fur, urine-smeared lower abdomen, weakness and emaciation. At autopsy, twelve dams revealed gastrointestinal ulcers, peritonitic lesions, hypertrophy of the spleen, adrenal and mesenteric lymph node, atrophy of the submaxillary gland, thymus and liver and discoloration of the liver and kidney. Death, sacrificing in extremis, premature or delayed delivery and poor nursing occurred in one to two dams each. Food consumption was significantly decreased and body weight gain was significantly retarded in this dose level group. At 100 mg/kg, urine-smeared lower abdomen, hypertrophy of the spleen and poor nursing were observed in one dam each. 2. Effects on F1 generation At 150 mg/kg, significantly decreased fetal weight, increased number of immature fetuses and significantly retarded ossification of the 5th and 6th sternebrae and coccygeal vertebrae as well as significantly depressed body weight gain of female offspring were observed. No abnormalities were observed in each treated group in terms of development, behavior, learning ability and reproductive performance of offspring. 3. Effects on F2 generation No abnormalities were observed in fetuses and newborn young in each treated group. Based on these results, the maximum non-effective doses of N-22 in this study were considered to be 50 mg/kg/day for dams and offspring and 100 mg/kg/day for fetuses.
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Affiliation(s)
- I Toteno
- Biological Research Center for the Protection of Environment, Shiga, Japan
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25
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26
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Abstract
The growth of a pseudosarcoma of the esophagus was observed chronologically by serial esophagography. Esophagograms taken 12 and 6 months prior to diagnosis showed no abnormalities. At diagnosis, the tumor in the lower esophagus had a polypoid and nodular surface with a stalk, and it was approximately 3 cm in diameter. Four months later, the tumor had increased in size to 4 cm in diameter. The tumor was 5 cm in length and incarcerated into the stomach with an elongated stalk at operation. The growth curve was linear on semilogarithmic paper; its doubling time was calculated as 2.2 months. The surgical specimen showed squamous cell carcinoma and spindle cell sarcoma-like elements that comprised the greater part of the tumor. The sarcoma-like elements had metastasized to the abdominal lymph nodes. These findings confirm that this polypoid tumor grows rapidly.
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Affiliation(s)
- K Sasajima
- First Department of Surgery, Nippon Medical School, Tokyo, Japan
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27
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Nishimori T, Morino K, Tsuchiyama M, Ikeda H, Hasegawa K, Higashio T, Akita S, Yamauchi T, Nakao K, Inukai T. [Effects of cadralazine on the central nervous system]. Nihon Yakurigaku Zasshi 1988; 91:209-20. [PMID: 3391445 DOI: 10.1254/fpj.91.209] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The effect of cadralazine, a new antihypertensive agent, were studied on the central nervous systems in experimental animals. Oral administration of 0.5 mg/kg or more of cadralazine depressed spontaneous motor activity and enhanced electroshock-induced convulsions in mice. The drug produced flush on the tail or ears at 0.5 mg/kg, p.o. or more and enhanced respiratory movement at 5.0 mg/kg, p.o. or more in rats. At 2.5 mg/kg, p.o., cadralazine prolonged the thiopental-sleeping time and inhibited methamphetamine-induced hypermotility as well as acetic acid-induced writhing in mice. Pretreatment of naloxone, however, failed to antagonize this inhibitory effect on acetic acid-induced writhing. Cadralazine at 5.0 mg/kg, p.o., lowered body temperature in rats. This same dose antagonized tremorine-induced behaviors in mice. Cadralazine at a dose of 1.0 or 5.0 mg/kg, i.v., had no effect on the spontaneous EEG pattern and the threshold of arousal EEG response induced by electrical stimulation to the midbrain reticular formation in rabbits. Even at a dose as large as 100 mg/kg, p.o., the drug showed no significant effect on the following effects: conditioned avoidance response in rats, spinal reflex in cats, tail pinch-induced pain in mice, and somatic function in the inclined screen or in the traction test in mice. In conclusion, cadralazine, having no passage through the blood-brain barrier, showed several pharmacological actions on behaviors. These actions are considered to be derived from its vasodilative properties and were qualitatively similar to those of hydralazine.
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Affiliation(s)
- T Nishimori
- Biological Research Center for the Protection of Environment, Shiga, Japan
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28
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Uemura T, Morino K, Uzawa S, Shiozaki K, Yanagida M. Cloning and sequencing of Schizosaccharomyces pombe DNA topoisomerase I gene, and effect of gene disruption. Nucleic Acids Res 1987; 15:9727-39. [PMID: 2827111 PMCID: PMC306527 DOI: 10.1093/nar/15.23.9727] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.1] [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: 01/02/2023] Open
Abstract
We cloned the structural gene topl+ for Schizosaccharomyces pombe DNA topoisomerase I (topo I) by hybridization. An eight-fold increase of topo I relaxing activity was obtained in S. pombe cells transformed with multicopy plasmid with topl+ insert. Nucleotide sequence determination showed a hypothetical coding frame interrupted by two short introns, encoding a 812 residue polypeptide (M.W. 94,000), 43 residues longer than and 47% homologous to Saccharomyces cerevisiae topo I. We show that the topl (null) strain made by gene disruption is viable, although its generation time is 20% longer than that of wild type. The topl locus is mapped in the long arm of chromosome II, using the Leu+ marker integrated with the cloned topl+ sequence. We constructed a double mutant topl (null) top2 (ts) and found its defective phenotype similar to that of previously obtained topl (heat sensitive) top2 (ts). The other double mutant topl (null) top2 (cs), however, was lethal. Our results suggest that topl+ gene of S. pombe is dispensable only if topo II activity is abundant.
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Affiliation(s)
- T Uemura
- Department of Biophysics, Faculty of Science, Kyoto University, Japan
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29
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Uemura T, Ohkura H, Adachi Y, Morino K, Shiozaki K, Yanagida M. DNA topoisomerase II is required for condensation and separation of mitotic chromosomes in S. pombe. Cell 1987; 50:917-25. [PMID: 3040264 DOI: 10.1016/0092-8674(87)90518-6] [Citation(s) in RCA: 514] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We show that DNA topoisomerase II (topo II) is continuously required for mitotic chromosome changes in Schizosaccharomyces pombe. We constructed cold-sensitive (cs) or temperature-sensitive (ts) strains mutated in the genes coding for topo II (top2) and beta-tubulin (nda3). The ATP-dependent activity of the top2cs gene product is cs in vitro. The cloned top2cs gene sequence predicts an amino acid substitution. A cs top2-cs nda3 double mutant at 20 degrees C shows long, entangled chromosomes, which condense and separate upon the shift to permissive temperatures. If spindle formation is prevented at permissive temperatures, the chromosomes condense but do not separate. Thus topo II is required for final chromosome condensation; moreover, pulse-shift experiments show that topo II is required for chromatid disjuction. Experiments with ts top2-cs nda3 cells show that topo II is also required for chromosome separation in anaphase: inactivation of topo II and activation of beta-tubulin allow normal spindle formation but result in "streaked" chromosomes.
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30
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Sasajima K, Taniguchi Y, Morino K, Yamashita K, Onda M, Takubo K, Ebata K. [Combined preoperative chemotherapy, hyperbaric oxygenation and radiation in advanced cancer of the esophagus]. Gan To Kagaku Ryoho 1987; 14:1941-3. [PMID: 2439022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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31
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Suganuma M, Fujiki H, Morino K, Takayama S, Sugimura T. Tumor promoting activity of teleocidin in skin and forestomach of mice initiated transplacentally with 7,12-dimethylbenz(a)anthracene. J Cancer Res Clin Oncol 1987; 113:123-5. [PMID: 3104345 DOI: 10.1007/bf00391432] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Experiments on the effect of transplacental initiation with 7,12-dimethylbenz(a)anthracene (DMBA) and postnatal promotion with teleocidin were carried out in mice. The percentage of tumor-bearing mice among females treated with DMBA transplacentally on day 17 of gestation and postnatally by topical application of teleocidin to the skin of the back was 73.3% in week 30, whereas that among females treated with DMBA on day 10 of gestation and postnatally by topical application of teleocidin was 20.0%. This indicates that teleocidin shows potent tumor promoting activity on mouse skin in a transplacental initiation and postnatal promotion protocol. Furthermore, in the males treated with DMBA transplacentally on day 17 of gestation and given diet containing 0.01% teleocidin postnatally five tumors of the forestomach were found in 5 of 19 effective mice (26.3%) in week 52. One of these five tumors was a squamous cell carcinoma, and the others were papillomas. This indicates that teleocidin also has tumor promoting activity in the forestomach of mice.
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Ohgaki H, Hasegawa H, Kusama K, Morino K, Matsukura N, Sato S, Maruyama K, Sugimura T. Induction of gastric carcinomas in nonhuman primates by N-ethyl-N'-nitro-N-nitrosoguanidine. J Natl Cancer Inst 1986; 77:179-86. [PMID: 3014196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
N-Ethyl-N'-nitro-N-nitrosoguanidine [(ENNG) CAS: 63885-23-4] was administered to 5 Macaca monkeys (Macaca mulatta and M. irus) at a concentration of 200 or 300 micrograms/ml for 11-26 months in their drinking water. Gastric carcinomas in the pyloric region were observed in all 5 monkeys between experimental months 11 and 38. Histologically, these carcinomas were mainly poorly differentiated adenocarcinomas and signet-ring cell carcinomas, and a few moderately and well-differentiated adenocarcinomas were also found. The macroscopic and histologic appearances of these carcinomas were similar to those in humans.
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Ohgaki H, Kato T, Morino K, Matsukura N, Sato S, Takayama S, Sugimura T. Study of the promoting effect of sodium chloride on gastric carcinogenesis by N-methyl-N'-nitro-N-nitrosoguanidine in inbred Wistar rats. Gan 1984; 75:1053-7. [PMID: 6526219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The effect of sodium chloride on the promotion stage of gastric carcinogenesis by N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) was studied in male inbred Wistar rats. Rats in group I were given MNNG at a concentration of 50 micrograms/ml in their drinking water for 12 weeks and then 1 ml of saturated NaCl solution intragastrically once a week until experimental week 65. Rats in group II were given MNNG for 12 weeks and then 1 ml of distilled water intragastrically once a week until week 65. Rats in group III were not treated for the first 12 weeks and were then given 1 ml of saturated NaCl solution intragastrically once a week until week 65. The incidence of adenomatous hyperplasias in the glandular stomach was significantly higher in group I than in group II, but the incidences of gastric adenocarcinomas and adenomas in groups I and II were not significantly different. No neoplastic or preneoplastic changes were observed in the stomach in group III.
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Ohgaki H, Kusama K, Matsukura N, Morino K, Hasegawa H, Sato S, Takayama S, Sugimura T. Carcinogenicity in mice of a mutagenic compound, 2-amino-3-methylimidazo[4,5-f]quinoline, from broiled sardine, cooked beef and beef extract. Carcinogenesis 1984; 5:921-4. [PMID: 6733854 DOI: 10.1093/carcin/5.7.921] [Citation(s) in RCA: 146] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A potent mutagenic compound, 2-amino-3-methylimidazo-[4,5-f]quinoline (IQ), isolated from broiled sardines, cooked beef and beef extract was tested for carcinogenicity in CDF1 mice of both sexes. Mice were given diet containing 0.03% IQ or control diet for up to 675 days. Tumors were observed mainly in the liver, forestomach and lung. In the mice given IQ, the incidences of these tumors were as follows: liver tumors - 41% in males and 75% in females; tumors of the forestomach - 41% in males and 31% in females; lung tumors - 69% in males and 42% in females. In the control mice, incidences of these tumors were as follows: liver tumors - 9% in males and 8% in females; tumors of the forestomach - 3% in males and 0% in females; lung tumors - 21% in males and 18% in females. The incidences of tumors in the liver, forestomach and lung were significantly higher in mice given IQ than in control mice.
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Ohgaki H, Matsukura N, Morino K, Kawachi T, Sugimura T, Takayama S. Carcinogenicity in mice of mutagenic compounds from glutamic acid and soybean globulin pyrolysates. Carcinogenesis 1984; 5:815-9. [PMID: 6539177 DOI: 10.1093/carcin/5.6.815] [Citation(s) in RCA: 69] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
2-Amino-6-methyldipyrido[1,2-a:3',2'-d]imidazole and 2- aminodipyrido [1,2-a:3',2'-d]imidazole, potent mutagens from glutamic acid pyrolysate, were given orally to CDF1 mice of both sexes at concentrations of 0.05% in pellet diet. 2-Amino-3-methyl-9H-pyrido[2,3-b]indole and 2-amino-9H-pyrido[2,3-b]indole, potent mutagens from soybean globulin pyrolysate, were given to CDF1 mice of both sexes at concentrations of 0.08%. Hepatocellular carcinomas and hemangioendothelial sarcomas in the brown adipose tissue were induced in high incidence by all these compounds.
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Ohgaki H, Kawachi T, Matsukura N, Morino K, Miyamoto M, Sugimura T. Genetic control of susceptibility of rats to gastric carcinoma. Cancer Res 1983; 43:3663-7. [PMID: 6861136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Genetic control of the induction of gastric tumors by N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) was studied in susceptible ACI rats, resistant Buffalo rats, and their F1 and F2 offspring. Both sexes of all strains, initially 7 to 9 weeks old, were given MNNG at a concentration of 83 micrograms/ml in their drinking water for 32 weeks and were sacrificed at experimental Week 72. The incidence of gastric adenocarcinoma in ACI rats was 80% in males and 47% in females; in Buffalo rats, the incidence was 18% in males and 0% in females. F1 hybrids showed the same resistance to MNNG as did Buffalo rats; the incidence of gastric adenocarcinoma was 17% in males and 8% in females. These results suggest that resistance to induction of gastric adenocarcinoma by MNNG is a dominant characteristic. The incidence of gastric adenocarcinoma in the F2 generation was 36% in males and 14% in females, which is close to the 3:1 ratio expected from the segregation of a single resistant gene. In ACI and Buffalo strains and their hybrids, males were more susceptible than females to induction of gastric carcinoma by MNNG. Intestinal tumors were observed mainly in the duodenum and jejunum in both strains and their hybrids, and the incidences were as follows: ACI: males, 67% and females 42%; Buffalo: males, 12% and females, 18%; F1: males, 18% and females, 15%; and F2: males, 15% and females, 19%. Thus, there seems to be a common genetic basis for both gastric and intestinal carcinogenesis by MNNG.
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Sasajima K, Taniguchi Y, Okazaki S, Morino K, Takubo K, Yamashita K, Shirota A. Sequential morphological studies of the esophageal carcinoma of rats induced by N-methyl-N-amylnitrosamine. Eur J Cancer Clin Oncol 1982; 18:559-64. [PMID: 6889529 DOI: 10.1016/0277-5379(82)90225-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
N-Methyl-N-amylnitrosamine was given to male Wistar rats in the drinking water at a concentration of 0.003% for 8 weeks. Three rats were autopsied weekly from the first to the 25th week. The stages of hyperplasia, dysplasia and squamous cell carcinoma in the esophagus were chronologically observed. Hyperplasia and dysplasia were found by the 6th week and continuously observed until the end of the experiment. Early squamous cell carcinomas were found in the 13th week. They showed endophytic or exophytic growths. Histologically, the endophytic growths were well-differentiated squamous cell carcinomas and the exophytic growths were poorly-differentiated. Advanced carcinomas were first found in the 15th week and were almost well-differentiated. Carcinomas were not found in papillomas. The incidence of carcinomas increased with time, being 9 out of 15 rats (60%) in the final 21st through 25th weeks. Lymph node metastasis was found in one rat, killed at the 24th week.
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Morino K. [Esophageal carcinoma and epithelial dysplasia in beagle dogs induced by N-ethyl-N'-nitro-N-nitrosoguanidine (author's transl)]. Nihon Shokakibyo Gakkai Zasshi 1982; 79:765-71. [PMID: 7098118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Ohgaki H, Kawachi T, Matsukura N, Morino K, Sugimura T. Genetic control of sensitivity of rats to gastrocarcinogenesis by N-methyl-N'-nitro-N-nitrosoguanidine. IARC Sci Publ 1982:603-609. [PMID: 7141567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The administration of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) in drinking water induces tumours, mainly adenocarcinomas in the glandular stomach of rats. The sensitivities of different strains of rats to gastrocarcinogenesis induced by MNNG vary: Wistar and ACI strains are sensitive, whereas the Buffalo strain is resistant. Genetic analyses were made on the induction of gastric tumous by MNNG in the ACI and Buffalo strains and their F1 and F2 hybrids. Rats of both sexes, 7-9 weeks old, were given 83 micrograms of MNNG/ml of drinking water for 32 weeks and sacrificed in experimental week 72. The incidences of gastric tumours were as follows: ACI strain, male 80%, female 63%; Buffalo strain, male 29%, female 6%; F1 hybrid, male 35%, female 9%; F2 hybrid, male 65%, female 29%. There were no significant differences in the sensitivities of Buffalo X ACI F1 and ACI X Buffalo F1, or of Buffalo X ACI F2 and ACI X Buffalo F2. These results show that the gene(s) controlling resistance to MNNG is autosomal in the Buffalo strain and is inherited dominantly by F1 and F2 hybrids. In both strains and their hybrids, the incidence of gastric tumours was higher in males than in females.
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Ohgaki H, Matsukura N, Morino K, Kawachi T, Sugimura T, Morita K, Tokiwa H, Hirota T. Carcinogenicity in rats of the mutagenic compounds 1-nitropyrene and 3-nitrofluoranthene. Cancer Lett 1982; 15:1-7. [PMID: 6277471 DOI: 10.1016/0304-3835(82)90068-4] [Citation(s) in RCA: 112] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
1-Nitropyrene and 3-nitrofluoranthene are present in diesel exhaust, in pollutants in air, and were also present in certain xerographic toners and copies. Their carcinogenicities were studied in male F344/DuCrj rats by subcutaneous injection. Sarcomas, mainly malignant fibrous histiocytomas at the site of injection were induced in 8 to 17 (47%) rats by 1-nitropyrene and in 4 of 10 (40%) rats by 3-nitrofluoranthene. Some tumors were serially transplantable in the same strain of rats.
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Morino K, Matsukara N, Kawachi T, Ohgaki H, Sugimura T, Hirono I. Carcinogenicity test of quercetin and rutin in golden hamsters by oral administration. Carcinogenesis 1982; 3:93-7. [PMID: 7067042 DOI: 10.1093/carcin/3.1.93] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Quercetin and its glycoside, rutin were tested for carcinogenicity in non-inbred golden hamsters of both sexes. In Experiment I, 10% quercetin, 10% rutin, or control diet was given to animals for 735 days. In this experiment, tumors appeared mainly in the forestomach, but the incidence was not statistically different among the three groups. Quercetin and rutin were not carcinogenic under these conditions. In Experiment II, Group 1 was given 4% quercetin diet for 709 days. Group 2 was given 1% quercetin diet for 351 days and then the basal diet for 350 days. Group 3 was given 1% quercetin diet and then 1% croton oil diet and Group 4 was given the basal diet followed by 1% croton oil diet, for the same periods as Group 2. Group 5 was given the basal diet for 701 days. In Experiment II, papillomas of the forestomach appeared in Groups 1, 2, and 5, and papillomatosis in Group 3 and 4. There were no statistical differences among experimental groups and respective controls. Thus, quercetin was not carcinogenic when given at the concentrations of 4% and 1%; even with the administration of 1% croton oil after 1% quercetin, there was no increase in tumor incidence.
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Matsukura N, Kawachi T, Wakabayashi K, Ohgaki H, Morino K, Sugimura T, Nukaya H, Kosuge T. Liver cancer and precancerous changes in rats induced by the basic fraction of tryptophan pyrolysate. Cancer Lett 1981; 13:181-6. [PMID: 7296529 DOI: 10.1016/0304-3835(81)90016-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The basic fraction of a tryptophan pyrolysate (Trp-P-BF) was given orally to Wistar rats for about 2 years. In Experiment I, 5 male rats each were given 0.2, 0.4, 0.6 and 0.8% Trp-P-BF. Dose-dependent growth retardation was observed in these groups and neoplastic nodules were found in the liver of 1 rat given 0.2% Trp-P-BF and a hepatocellular carcinoma was found in 1 rat given 0.4% Trp-P-BF diet. In Experiment II, 25 rats of both sexes were fed 0.5% or 0.2% Trp-P-BF diet. Neoplastic nodules were induced in 2 of 22 males and 5 of 18 females given 0.2% Trp-P-BF diet. Mammary adenomas developed, but no neoplastic nodules were found in the liver of rats fed on 0.05% Trp-P-BF or control diet. Females were more sensitive to Trp-P-BF than males.
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Matsukura N, Kawachi T, Morino K, Ohgaki H, Sugimura T, Takayama S. Carcinogenicity in mice of mutagenic compounds from a tryptophan pyrolyzate. Science 1981; 213:346-7. [PMID: 7244619 DOI: 10.1126/science.7244619] [Citation(s) in RCA: 157] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The compounds 3-amino-1,4-dimethyl-5H-pyrido[4,3-b]indole and 3-amino-1-methyl-5H-pyrido[4,3-b]indole, which are potent mutagens in a tryptophan pyrolyzate, ar hepatic carcinogens when given orally to mice at concentrations of 200 parts per million in a pellet diet. Female mice showed higher susceptibilities to both compounds than male mice.
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Morino K, Okazaki S, Sasajima K, Yamashita K, Miki M, Shirota A. Application of a percutaneous transhepatic cholangiofiberscope for endoscopic examination of the esophagus in rats. Gan 1980; 71:735-6. [PMID: 7227723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Kobayashi J, Morino K, Asai I, Mano H. Biological protection mechanisms of radioprotectors in mammalian cells. XV. Effects of AET and serotonin on DNA synthesis of Ehrlich tumor cells. Tokushima J Exp Med 1970; 17:101-3. [PMID: 5489625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Kobayashi J, Morino K, Asai I, Mano H. Biological protection mechanisms of radioprotectorsin mammalian cells. XIV. Effect of AET on DNA synthesis in mouse somatic cells. Tokushima J Exp Med 1970; 17:97-9. [PMID: 5489635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Kobayashi J, Morino K, Mano H, Asai I. Biological protection mechanisms of radioprotectors in mammalian cells. 13. Effects of AET and serotonin on the DNA content of Ehrlich tumor cell nuclei. Tokushima J Exp Med 1970; 17:91-6. [PMID: 5489634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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