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Kawano S, Okada H, Kawahara Y, Hori K, Tanioka D, Tsuzuki T, Inoue M, Yagi S, Takenaka R, Yamamoto K. Proton pump inhibitor dose-related healing rate of artificial ulcers after endoscopic submucosal dissection: a prospective randomized controlled trial. Digestion 2011; 84:46-53. [PMID: 21304241 DOI: 10.1159/000321660] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Accepted: 10/01/2010] [Indexed: 02/04/2023]
Abstract
BACKGROUND/AIMS Two studies have reported on the superiority of a proton pump inhibitor (PPI) compared with a histamine-2-receptor antagonist for the treatment of artificial ulcers after endoscopic submucosal dissection (ESD), but the optimal dose of PPI remains to be defined. The aim of this study was to evaluate the possibility of reducing the dose of PPI. The authors thus compared 30 mg (standard-dose) and 15 mg (half-dose) lansoprazole in terms of ulcer healing, prevention of bleeding and quality of life. METHODS 91 patients with gastric mucosal neoplasm were enrolled. All patients who underwent ESD were administered lansoprazole 30 mg daily during the first week, after which they were randomly assigned to either the standard-dose or half-dose group. RESULTS One patient in each group developed hematemesis. The stage of ulcers, ulcer reduction ratios and scores on the Gastrointestinal Symptom Rating Scale did not differ at 28 and 56 days. The costs of PPI for the half-dose group and standard-dose group were 7,326.5 and 11,698.4 JPY, respectively, i.e. a difference of 471.9 JPY. CONCLUSIONS A reduced dose of PPI after 1 week of ESD was equivalent in treatment performance to the standard dose and cheaper.
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Yagi S, Yagi AI, Gadir EHA, Henry M, Chapleur Y, Laurain-Mattar D. Toxicity of Hydnora johannis Becca. dried roots and ethanol extract in rats. JOURNAL OF ETHNOPHARMACOLOGY 2011; 137:796-801. [PMID: 21762770 DOI: 10.1016/j.jep.2011.06.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 05/23/2011] [Accepted: 06/28/2011] [Indexed: 05/31/2023]
Abstract
AIM OF THE STUDY Hydnora johannis Becca. (Hydnoraceae) commonly is used for the treatment of dysentery, diarrhoea, cholera and swelling tonsillitis in the folk medicine of Sudan and other African countries. This study evaluates the toxicological effects of Hydnora johannis roots on Wistar rats. MATERIALS AND METHODS Rats were randomized into control, groups fed with 2, 10, 20% of dried roots for 8 weeks and other groups given ethanol extract (50, 100, 200 and 400mg/kg/day) through oral and intramuscularly administration for 2 weeks. Toxicity was evaluated using biochemical and histopathological assays. RESULTS Alterations in the levels of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, cholesterol and urea were observed. Histopathological analysis revealed that the toxic effect were mainly on the liver, kidney and spleen on all treated groups. However, the impact of the dried roots was mild compared to the ethanol extract. Remarkably, there was a drop in cholesterol level in all treatment groups suggesting the antiartherogenic effect of Hydnora johannis roots. CONCLUSION The results from this study suggest that the powder preparation as well as ethanolic extract of Hydnora johannis roots induced toxic effect on Wistar rats. The observed toxic effect might be due to the dose and/or frequency of administration. Although in traditional medicine the extract is administrated in low dose, the results suggest the necessity of standardization of the drug.
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Yagi S, Sata M. Pre-clinical data on the role of mineralocorticoid receptor antagonists in reversing vascular inflammation. Eur Heart J Suppl 2011. [DOI: 10.1093/eurheartj/sur012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ino K, Shibata K, Yamamoto E, Kajiyama H, Nawa A, Mabuchi Y, Yagi S, Minami S, Tanizaki Y, Kobayashi A, Kikkawa F. Role of the Renin-Angiotensin System in Gynecologic Cancers. Curr Cancer Drug Targets 2011; 11:405-11. [DOI: 10.2174/156800911795538057] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2010] [Accepted: 03/04/2011] [Indexed: 11/22/2022]
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Iida T, Kaido T, Yoshizawa A, Yagi S, Hata K, Ogura Y, Mori A, Isoda H, Uemoto S. A rare variation of the biliary tree of relevance to live liver donation. Am J Transplant 2011; 11:869-70. [PMID: 21446984 DOI: 10.1111/j.1600-6143.2011.03457.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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56
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Ichitsubo T, Yukitani S, Hirai K, Yagi S, Uda T, Matsubara E. Mechanical-energy influences to electrochemical phenomena in lithium-ion batteries. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02893b] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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57
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Sonoyama T, Tani H, Matsuda K, Kageyama B, Tanimoto M, Kobayashi K, Yagi S, Kyotani H, Mitsushima K. Production of 2-Keto-l-Gulonic Acid from d-Glucose by Two-Stage Fermentation. Appl Environ Microbiol 2010; 43:1064-9. [PMID: 16346005 PMCID: PMC244186 DOI: 10.1128/aem.43.5.1064-1069.1982] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A practical method for the production of calcium 2-keto-l-gulonate (an intermediate in the Reichstein synthesis of l-ascorbic acid) from d-glucose has been established by using a two-stage fermentation system. d-Glucose was first converted to calcium 2,5-diketo-d-gluconate by a mutant strain of Erwinia sp. in a medium containing d-glucose, corn steep liquor, (NH(4))(2)HPO(4), and CaCO(3). After a 26-h cultivation, 328.6 mg of calcium 2,5-diketo-d-gluconate per ml was obtained, with a 94.5% yield from d-glucose. This broth was used directly for the next conversion without removal of cells by treatment with sodium dodecyl sulfate. The stereospecific reduction of calcium 2,5-diketo-d-gluconate to calcium 2-keto-l-gulonate was performed with a mutant strain of Corynebacterium sp. When the cell growth reached a maximum (about 16 h) in a medium containing d-glucose, corn steep liquor, NaNO(3), KH(2)PO(4), and trace elements, NaNO(3) was added to the culture, and then the calcium 2,5-diketo-d-gluconate broth was fed over a period of about 50 h. Since the mutant strain requires a hydrogen donor for reduction, the calcium 2,5-diketo-d-gluconate broth was mixed with d-glucose before being fed. The results of four two-stage fermentations in 10-m conventional fermentors showed that an average of 106.3 mg of calcium 2-keto-l-gulonate per ml was obtained, with a 84.6% yield from d-glucose, the starting material of calcium 2,5-diketo-d-gluconate production. Calcium 2-keto-l-gulonate was stable in the broth. Neither 2-keto-d-gluconic acid nor 5-keto-d-gluconic acid was detected in the final broth.
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Yasuhara H, Miyake Y, Toyokawa T, Matsumoto K, Takahara M, Imada T, Yagi S, Miyatake H, Nakatsu M, Ando M, Hirohata M. Large waist circumference is a risk factor for reflux esophagitis in Japanese males. Digestion 2010; 81:181-7. [PMID: 20090333 DOI: 10.1159/000235919] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2009] [Accepted: 08/12/2009] [Indexed: 02/04/2023]
Abstract
BACKGROUND/AIMS The prevalence of reflux esophagitis, which might lead to development of Barrett's esophagus and esophageal adenocarcinoma, has been increasing. The aim of this study was to assess risk factors for reflux esophagitis. METHODS We conducted a cross-sectional study of 1,495 Japanese subjects undergoing health checkups (822 males and 673 females; median age 50 years) at a tertiary care center. RESULTS One hundred and twenty-seven subjects (8%) had reflux esophagitis and hiatal hernia was observed in 292 subjects (20%). Reflux esophagitis (13 vs. 3%) and hiatal hernia (28 vs. 9%) were more frequent in males than females. Significant differences in clinical backgrounds were observed between females and males. Multivariate logistic regression analyses revealed that hiatal hernia (OR 6.63, 95% CI 2.47-17.8; p = 0.0002) was associated with reflux esophagitis in females. In males, age (per 1-year increment: OR 0.96, 95% CI 0.94-0.99; p = 0.007), hiatal hernia (OR 3.16, 95% CI 2.05-4.87; p < 0.0001) and waist circumference (per 1-cm increase: OR 1.09, 95% CI 1.02-1.15; p = 0.006) were associated with reflux esophagitis. CONCLUSIONS Abdominal obesity may be an important risk factor for reflux esophagitis in males compared with females.
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Ouchi Y, Yoshikawa E, Kanno T, Futatsubashi M, Yagi S, Torizuka T. O.094 Neuroinflammation in the living brain of Parkinson's disease. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70109-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kobashi Y, Mouri K, Yagi S, Obase Y, Miyashita N, Okimoto N, Matsushima T, Kageoka T, Oka M. Clinical evaluation of the QuantiFERON-TB Gold test in patients with non-tuberculous mycobacterial disease. Int J Tuberc Lung Dis 2009; 13:1422-1426. [PMID: 19861017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
OBJECTIVE To evaluate the clinical usefulness of the QuantiFERON TB-2G (QFT-2G) test in patients with non-tuberculous mycobacterial (NTM) disease without a previous history of tuberculosis (TB). METHODS The study consisted of 214 patients with NTM disease who satisfied the diagnostic guidelines of the American Thoracic Society. RESULTS The causative microorganism was Mycobacterium avium in 83 patients, M. intracellulare in 80, M. kansasii in 33, M. marinum in 12, M. szulgai in 3, M. abscessus in 2 and M. chelonei in 1. The positive response rate of QFT-2G test result was 2% in 163 patients with M. avium-intracellulare complex (MAIC) disease, 52% in 33 with M. kansasii disease, 58% in 12 with M. marinum disease, 33% in 3 with M. szulgai disease, 0% in two with M. abscessus disease and 0% in one with M. chelonei disease. The positivity of the QFT-2G test was 52% in patients with NTM disease, thought to be because NTM possesses common M. tuberculosis-specific antigens. CONCLUSIONS Although QFT-2G may be a useful diagnostic method to differentiate TB from MAIC disease, there are several problems to be resolved before it can be used as a diagnostic method for NTM disease (M. kansasii disease), including the determination of the positive cut-off level for QFT-2G test.
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Higuchi R, Minami S, Yagi S, Otani T, Kioka N, Hiramatsu C, Sugimoto T. Gestational thyrotoxicosis during a triplet pregnancy. J OBSTET GYNAECOL 2009; 28:444-5. [DOI: 10.1080/01443610802164318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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62
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Ouchi Y, Yoshikawa E, Futatsubashi M, Kanno T, Yagi S, Tanizaki Y, Torizuka T, Sakamoto M. Changes in Brain Serotonin Transporter and Glucose Metabolism in Alzheimer's Disease. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70695-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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63
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Miyazaki H, Ito T, Im HJ, Yagi S, Kato M, Soda K, Kimura S. Direct observation of momentum-dependent exchange interaction in a heisenberg ferromagnet. PHYSICAL REVIEW LETTERS 2009; 102:227203. [PMID: 19658899 DOI: 10.1103/physrevlett.102.227203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Indexed: 05/28/2023]
Abstract
We measured the temperature-dependent three-dimensional angle-resolved photoemission spectra of EuO (100) thin film, a typical Heisenberg ferromagnetic semiconductor, to investigate the essential origin of the ferromagnetic transition. We observed sizable energy dispersion and large binding-energy shift of the Eu 4f state below the Curie temperature only near the Gamma and X points, despite the expected Heisenberg-type local magnetism. The band dispersion and temperature dependence of the Eu 4f state indicates that the indirect exchange and superexchange interactions have strong momentum dependence. The observed temperature-dependent energy shift of the 4f state is the essential origin of the magnetism of EuO.
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Matsumoto K, Miyake Y, Miyatake H, Takahara M, Imada T, Yagi S, Toyokawa T, Nakatsu M, Ando M, Hirohata M. A combination treatment of entecavir and early-phase corticosteroid in severe exacerbation of chronic hepatitis B. World J Gastroenterol 2009; 15:1650-2. [PMID: 19340912 PMCID: PMC2669952 DOI: 10.3748/wjg.15.1650] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Of patients with severe exacerbation of chronic hepatitis B accompanied by jaundice and coagulopathy, 20%-30% have a fatal outcome. In this report, we describe 2 cases of severe exacerbation of chronic hepatitis B with jaundice and coagulopathy who were successfully treated with a combination of entecavir and corticosteroid. In both cases, rapid reductions in serum hepatitis B virus (HBV)-DNA levels were observed, and corticosteroid was stopped after serum HBV-DNA levels became undetectable. Entecavir treatment was continued. Generally, entecavir treatment reduced serum HBV-DNA levels rapidly, although the improvement in liver function was delayed by a few weeks. During this time lag, liver cell injury continued and the disease progressed. Corticosteroid suppressed the excessive host immune response and was useful for stopping progressive deterioration. A combination of entecavir and early-phase corticosteroid may be a useful treatment in severe exacerbation of chronic hepatitis B.
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Ogura Y, Yagi S, Iida T, Elmoghazy W, Uemoto S. 86. Intentional Portal Pressure Control Can Improve Survivals in Adult-to-Adult Living Donor Liver Transplant, Even With Utilizing Smaller Liver Grafts Than Before. J Surg Res 2009. [DOI: 10.1016/j.jss.2008.11.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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66
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Yagi S, Okada H, Takenaka R, Miyoshi M, Suzuki S, Toyokawa T, Kawahara Y, Yamamoto K. Influence of Helicobacter pylori eradication on reflux esophagitis in Japanese patients. Dis Esophagus 2009; 22:361-7. [PMID: 19191852 DOI: 10.1111/j.1442-2050.2008.00933.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The relationship between Helicobacter pylori eradication and reflux esophagitis is controversial. We analyzed the development of reflux esophagitis and the change in the grade of pre-existing reflux esophagitis after eradication. Enrolled were 559 Japanese patients who received eradication therapy for H. pylori. The grade of reflux esophagitis by endoscopy before and after therapy was evaluated retrospectively. No esophagitis was present before eradication in 526 patients. H. pylori was and was not eradicated in 429 and 97, respectively. Reflux esophagitis developed in 40 of the eradication group and in three of the treatment failure group, with prevalence higher with successful eradication (P = 0.04). Successful eradication and hiatus hernia were significant risk factors for reflux esophagitis development. Twenty-seven of 33 patients with pre-existing reflux esophagitis had successful eradication and six treatment failure. The reflux esophagitis grade worsened in two (Los Angeles classification from A to B) and improved in 14 patients after eradication. With treatment failure, reflux esophagitis worsened in none and improved in three patients. There showed no significant change in the grade of pre-existing reflux esophagitis after H. pylori eradication but the sample size was too small to evaluate the difference. In conclusion, the eradication of H. pylori increases the prevalence of reflux esophagitis, and hiatus hernia was a significant risk factor for the development of reflux esophagitis.
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Yagi S, Okada H, Takenaka R, Miyoshi M, Suzuki S, Toyokawa T, Kawahara Y, Yamamoto K. Influence of Helicobacter pylori eradication on reflux esophagitis in Japanese patients. Dis Esophagus 2009. [PMID: 19191852 DOI: 10.1111/j.1442-2050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The relationship between Helicobacter pylori eradication and reflux esophagitis is controversial. We analyzed the development of reflux esophagitis and the change in the grade of pre-existing reflux esophagitis after eradication. Enrolled were 559 Japanese patients who received eradication therapy for H. pylori. The grade of reflux esophagitis by endoscopy before and after therapy was evaluated retrospectively. No esophagitis was present before eradication in 526 patients. H. pylori was and was not eradicated in 429 and 97, respectively. Reflux esophagitis developed in 40 of the eradication group and in three of the treatment failure group, with prevalence higher with successful eradication (P = 0.04). Successful eradication and hiatus hernia were significant risk factors for reflux esophagitis development. Twenty-seven of 33 patients with pre-existing reflux esophagitis had successful eradication and six treatment failure. The reflux esophagitis grade worsened in two (Los Angeles classification from A to B) and improved in 14 patients after eradication. With treatment failure, reflux esophagitis worsened in none and improved in three patients. There showed no significant change in the grade of pre-existing reflux esophagitis after H. pylori eradication but the sample size was too small to evaluate the difference. In conclusion, the eradication of H. pylori increases the prevalence of reflux esophagitis, and hiatus hernia was a significant risk factor for the development of reflux esophagitis.
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Seki N, Yagi S, Suzuki Y, Shimada F, Taira M, Makino H, Amano K, Yagui K, Saito Y, Hashimoto N. Protein tyrosine phosphatase regulation in fibroblasts from patients with an insulin receptor gene mutation. Horm Metab Res 2008; 40:833-7. [PMID: 18925540 DOI: 10.1055/s-0028-1082082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Tyrosine phosphorylation of the insulin receptor is the initial event following receptor binding to insulin, and it induces further tyrosine phosphorylation of various intracellular molecules. This signaling is countered by protein tyrosine phosphatases (PTPases), which reportedly are associated with insulin resistance that can be reduced by regulation of PTPases. Protein tyrosine phosphatase 1B (PTP1B) and leukocyte antigen-related PTPase (LAR) are the PTPases implicated most frequently in insulin resistance and diabetes mellitus. Here, we show that PTP1B and LAR are expressed in human fibroblasts, and we examine the regulation of PTPase activity in fibroblasts from patients with an insulin receptor gene mutation as an in vitro model of insulin resistance. Total PTPase activity was significantly lower in the cytosolic and membrane fractions of fibroblasts with mutations compared with controls (p<0.05). Insulin stimulation of fibroblasts with mutations resulted in a significantly smaller increase in PTP1B activity compared with stimulation of wild-type fibroblasts (p<0.05). This indicates that insulin receptor gene mutations blunt increases in PTPase activity in response to insulin, possibly via a negative feedback mechanism. Our data suggest that the PTPase activity in patients with insulin receptor gene mutation and severe insulin resistance may differ from that in ordinary type 2 diabetes.
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MESH Headings
- Blotting, Western
- Cells, Cultured
- Exons/genetics
- Fibroblasts/enzymology
- Gene Expression Regulation, Enzymologic/genetics
- Gene Expression Regulation, Enzymologic/physiology
- Humans
- Immunoprecipitation
- Insulin/pharmacology
- Insulin Resistance/genetics
- Mutation/physiology
- Protein Tyrosine Phosphatase, Non-Receptor Type 1/genetics
- Protein Tyrosine Phosphatase, Non-Receptor Type 1/metabolism
- Protein Tyrosine Phosphatases/biosynthesis
- Protein Tyrosine Phosphatases/genetics
- Receptor, Insulin/genetics
- Receptor-Like Protein Tyrosine Phosphatases, Class 4/genetics
- Receptor-Like Protein Tyrosine Phosphatases, Class 4/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Stimulation, Chemical
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Takenaka R, Kawahara Y, Okada H, Hori K, Inoue M, Kawano S, Tanioka D, Tsuzuki T, Yagi S, Kato J, Uemura M, Ohara N, Yoshino T, Imagawa A, Fujiki S, Takata R, Yamamoto K. Risk factors associated with local recurrence of early gastric cancers after endoscopic submucosal dissection. Gastrointest Endosc 2008; 68:887-94. [PMID: 18565523 DOI: 10.1016/j.gie.2008.03.1089] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2007] [Accepted: 03/17/2008] [Indexed: 12/13/2022]
Abstract
BACKGROUND Although endoscopic submucosal dissection (ESD) is expected to reduce the local recurrence of gastric cancers, we still experience cases of recurrence after an ESD. OBJECTIVE To characterize clinical and pathologic features of cases with local recurrence of early gastric cancer after an ESD. DESIGN A prospective cohort study. SETTING AND PATIENTS A total of 306 patients with gastric cancers removed by ESD at Okayama University Hospital and Tsuyama Central Hospital between March 2001 and December 2005 were enrolled. INTERVENTION ESD. MAIN OUTCOME MEASUREMENT Local recurrence. RESULTS The incidence of a complete en bloc resection was 80.4% when pathologically evaluated. Within a median follow-up period of 26 months (12-64 months), a local recurrence was found in 7 cases, all of which had been declared incomplete resections. One patient underwent a second ESD, and the remaining 6 underwent a surgical resection. All removed lesions were mucosal cancers. No lymph-node metastases were found in patients with a surgical resection. There was a significant correlation between the incidence of an incomplete resection and that of a local recurrence (P < .0001). Among the clinical characteristics, tumor size (>30 mm vs <20 mm; odds ratio [OR] 16 mm [95% CI, 2.0-130 mm]) and tumor location (upper vs middle or lower; OR 7.6 [95% CI, 1.3-45]) were identified as factors that were significantly associated with the incidence of a local recurrence. LIMITATION Short follow-up duration. CONCLUSIONS The incidence of a local recurrence was strongly associated with that of an incomplete resection. The frequency of a local recurrence also showed significant correlations with the tumor size and location within the stomach.
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Imagawa A, Fujiki S, Kawahara Y, Matsushita H, Ota S, Tomoda T, Morito Y, Sakakihara I, Fujimoto T, Taira A, Tsugeno H, Kawano S, Yagi S, Takenaka R. Satisfaction with bispectral index monitoring of propofol-mediated sedation during endoscopic submucosal dissection: a prospective, randomized study. Endoscopy 2008; 40:905-9. [PMID: 19023932 DOI: 10.1055/s-2008-1077641] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND STUDY AIMS Endoscopic submucosal dissection (ESD) is one of the most complex and lengthy endoscopic procedures, so deep sedation during ESD is indispensable. Our study aims were to determine whether bispectral index (BIS) monitoring is useful in titrating and reducing the dose of the sedative propofol during ESD, and to measure the satisfaction of patients and endoscopists involved in this complex and lengthy endoscopic therapy. PATIENTS AND METHODS We performed a prospective, randomized clinical trial from July 2006 to February 2008. A total of 156 patients, with gastric neoplasm to be treated using ESD, were randomized to two groups. The BIS group (n = 78) was monitored for propofol sedation using BIS, and the no-BIS group (n = 78) was monitored by standard methods only. The two groups were compared by evaluating the doses of propofol administered to patients and the satisfaction scores (scale of 0 - 10) of patients and endoscopists. RESULTS Although there were no significant differences between the two groups in the mean dose of propofol used (BIS group vs. no-BIS group, 5.32 mg/kg/hour vs. 4.85 mg/kg/hour; P = 0.10), the satisfaction scores of the patients (9.15 vs. 7.94; P < 0.01) and endoscopists (8.53 vs. 6.42; P < 0.001) were significantly higher with BIS monitoring. CONCLUSIONS Monitoring with BIS during the ESD procedure did not lead to a reduction in the dose of propofol required, but did lead to higher satisfaction scores from the patients and endoscopists. A complicated and prolonged endoscopic treatment such as ESD can be carried out with optimal safety, control, and comfort by using BIS to monitor propofol sedation.
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71
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Higuchi R, Sugimoto T, Hiramatsu C, Kumagai T, Okutani T, Yagi S, Matsuoka T, Yata C, Minami S. Neonatal pseudo-Bartter syndrome due to maternal eating disorder. J Perinatol 2008; 28:646-8. [PMID: 18756276 DOI: 10.1038/jp.2008.68] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A total of 4 of 153 low birth weight infants at our hospital were found to have pseudo-Bartter syndrome in 2005 and 2006. The neonates (two of whom were twins; light for gestational age 2, appropriate for gestational age 1 and small for gestational age 1) showed symptoms of apnea and/or poor feeding or patent ductus arteriosus, which disappeared by day 4. Hypokalemia, hypochloremia and metabolic alkalosis normalized by day 8. The mothers had repeatedly rushed to the restroom after eating while in hospital, and were lighter at delivery than before pregnancy; however, vomiting was not observed. The mothers had several stress factors related to pregnancy, and all recovered from the eating disorder after delivery. Urinary Cl/creatinine (mequiv. mg(-1)) and serum Mg in the infants were <0.1 and 1.6 to 2.3 mg per 100 ml, respectively. Eating disorder during pregnancy may have caused Bartter-like syndrome and weight loss, and led to the same syndrome and intrauterine growth retardation in the offspring. Therefore, a hidden maternal eating disorder may underlie neonatal pseudo-Bartter syndrome.
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Inukai M, Soda K, Miyazaki H, Kato M, Yagi S, Yokoyama Y. Cluster models for decagonal quasicrystals. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308092829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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73
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Takenaka R, Kawahara Y, Okada H, Tsuzuki T, Yagi S, Kato J, Ohara N, Yoshino T, Imagawa A, Fujiki S, Takata R, Nakagawa M, Mizuno M, Inaba T, Toyokawa T, Sakaguchi K. Endoscopic submucosal dissection for cancers of the remnant stomach after distal gastrectomy. Gastrointest Endosc 2008; 67:359-63. [PMID: 18226704 DOI: 10.1016/j.gie.2007.10.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2007] [Accepted: 10/06/2007] [Indexed: 02/08/2023]
Abstract
BACKGROUND Endoscopic submucosal dissection (ESD) of early gastric cancer is less invasive than surgical resection, and if technically feasible, it may result in less long-term morbidity than does incisional surgery. However, ESD is technically difficult in patients who have had a previous distal gastrectomy. OBJECTIVE Our purpose was to retrospectively assess the results of ESD of early gastric cancer in the remnant stomach. DESIGN Case series. SETTING AND PATIENTS A total of 31 lesions in 30 patients with early remnant gastric cancer were treated with ESD at Okayama University Hospital, Tsuyama Central Hospital, Hiroshima City Hospital, Kagawa Prefectural Central Hospital, and Mitoyo General Hospital from March 2001 to January 2007. INTERVENTION ESD. MAIN OUTCOME MEASUREMENTS En bloc resection rate, complete resection rate, operation time, and complications. RESULTS En bloc resection and complete resection were achieved in 30 (97%) and in 23 (74%) lesions, respectively. The median operation time required for ESD in the remnant stomach was 113 minutes (range 45-450 minutes). Perforation occurred in 4 (13%). The incidence of delayed bleeding requiring blood transfusion was 0%. LIMITATION Short duration of follow-up. CONCLUSIONS ESD is feasible in the remnant stomach but has a relatively high complication rate and should only be performed by experienced endoscopists.
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Nomoto T, Sumi O, Yagi S, Soda K, Namatame H, Taniguchi M. Coadsorption reaction between (CH3)2S and H2O on Rh(100) studied by NEXAFS and XPS. SURF INTERFACE ANAL 2008. [DOI: 10.1002/sia.2614] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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75
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Ohgane J, Yagi S, Shiota K. Epigenetics: the DNA methylation profile of tissue-dependent and differentially methylated regions in cells. Placenta 2007; 29 Suppl A:S29-35. [PMID: 18031808 DOI: 10.1016/j.placenta.2007.09.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2007] [Revised: 09/25/2007] [Accepted: 09/26/2007] [Indexed: 10/22/2022]
Abstract
Methylation of DNA, which occurs at cytosines of CpG sequences, is a unique chemical modification of the vertebrate genome. Methylation patterns can be copied to daughter DNA after mitosis; thus DNA methylation has been suggested to act as a "cellular memory of the genome function". Genome-wide analysis of DNA methylation revealed that there are numerous tissue-dependent differentially methylated regions (T-DMRs) in unique sequences of the mammalian genome. There are T-DMRs in both CpG-rich and -poor sequences. Methylation of T-DMRs is responsible for gene-silencing and chromatin structure change. Each tissue/cell type has a unique DNA methylation profile that consists of methylation patterns of numerous loci in the genome. DNA methylation profiles are not associated with bulk DNA, which is mainly comprised of repetitive sequences. Disruption of DNA methylation profiles putatively produce abnormal cells and tissues. Cloned mice produced by somatic nuclear transfer are associated with aberrant DNA methylation profiles. Tissue/cell type-specific DNA methylation profiles can provide a novel viewpoint for understanding normal and aberrant development, in terms of both differentiation and reproduction.
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Sazawa H, Hirata K, Kosaki M, Shibata N, Furuta K, Yagi S, Tanaka Y, Kinoshita A, Shimizu M, Okumura H. Evaluation of AlGaN/GaN-HFET with HfAlO gate insulator. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pssc.200674920] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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77
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Yagi S, Shimizu M, Inada M, Okumura H, Ohashi H, Yano Y, Akutsu N. Off-state drain current and breakdown voltage of AlGaN/GaN MIS-HEMT with multilayered gate insulator. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pssc.200674739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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78
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Bandyopadhyay A, Nittoh K, Wakayama Y, Yagi S, Miki K. Global Tuning of Local Molecular Phenomena: An Alternative Approach to Bionanoelectronics. J Phys Chem B 2006; 110:20852-7. [PMID: 17048898 DOI: 10.1021/jp062311n] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We have applied simultaneous horizontal and vertical bias to a single molecule (2 nm(2)) in an ordered and disordered matrix to virtually isolate and tune its property without taking it out physically from its environment. Using a dedicated electrode system, we have locally tuned nanoscale properties vertically by STM, while stabilizing its environment by applying a global electric field horizontally. Using this technique, we report tuning of molecular conformations in room temperature, whose evolution of states has been statistically investigated. We have also shown control on switching of a few selected conformations by applying dual bias simultaneously. As we avoid any direct injection of charge into the system via electrode contact, this technique could be used as a generalized method to tune phenomena evolved in an environment of weak interaction from a large distance without destroying the property.
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79
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Kamei Y, Yagi S, Torii S. P.307 Use of an omental flap with a titanium mesh plate for the reconstruction of cranial osteomyelitis. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60812-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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80
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Yagi S, Kamei Y, Torii S. P.331 Use of the internal mammary vessel as a recipient vessel in head and neck reconstruction. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60836-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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81
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Higashino K, Matsui Y, Yagi S, Takata Y, Goto T, Sakai T, Katoh S, Yasui N. The alpha2 type IX collagen tryptophan polymorphism is associated with the severity of disc degeneration in younger patients with herniated nucleus pulposus of the lumbar spine. INTERNATIONAL ORTHOPAEDICS 2006; 31:107-11. [PMID: 16586133 PMCID: PMC2267527 DOI: 10.1007/s00264-006-0117-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2006] [Revised: 01/20/2006] [Accepted: 02/10/2006] [Indexed: 10/24/2022]
Abstract
Tryptophan alleles in COL9A2 (Trp2) and COL9A3 (Trp3) have been linked to lumbar disc diseases in the Finnish population. Although such diseases consist of various pathogenetically different conditions, detailed analysis of each has not been well documented. The aim of this study was to clarify whether the collagen IX tryptophan alleles influence the symptomatic degeneration of the lumbar disc in Japanese patients with herniated nucleus pulposus. We performed a prospective study of 84 patients who underwent lumbar discectomy. The degree of disc degeneration was evaluated by magnetic resonance images in relation to the collagen IX genotype. Twenty patients (21.4%) had the Trp2 allele and no patients had the Trp3 allele. Patients under 40 years with the Trp2 allele showed more severe disc degeneration at the surgical level than did those without the Trp2 allele (odds ratio 6.00, P=0.043). In contrast, patients aged 40 years or over did not show significant association between disc degeneration and collagen IX genotype. Our results suggest that the Trp2 allele is an age-dependent risk factor for the severity of disc degeneration in younger patients with symptomatic herniated nucleus pulposus of the lumbar spine.
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Aihara K, Azuma H, Akaike M, Kurobe H, Fujimura M, Hashizume S, Ikeda Y, Yagi S, Kitagawa T, Matsumoto T. Mo-P4:271 Plasma heparin cofactor II activity is a predictor for incidence of peripheral arterial disease in patients with cardiovascular risk factors. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80404-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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83
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Fujimura M, Akaike M, Iwase T, Yagi S, Ikeda Y, Hashizume S, Aihara K, Azuma H, Matsumoto T. Mo-P4:252 Improvement of cardiac function in response to carvedilol is accompanied by increased adiponectin levels in patients with chronic heart failure. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80385-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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84
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Akaike M, Aihara K, Yagi S, Ikeda Y, Ishikawa K, Iwase T, Hashizume S, Fujimura M, Azuma H, Matsumoto T. Th-P16:359 Pitavastatin ameliorates glucocorticoid-induced hypertension through increasing expression of endothelial nitric oxide synthase. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82317-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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85
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Taniguchi K, Tabata M, Iida T, Hori T, Yagi S, Uemoto S. Significance of lymph node micrometastasis in pN0 hilar bile duct carcinoma. Eur J Surg Oncol 2005; 32:208-12. [PMID: 16377119 DOI: 10.1016/j.ejso.2005.11.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2005] [Accepted: 11/14/2005] [Indexed: 11/28/2022] Open
Abstract
AIMS To examine micrometastasis in node-negative hilar bile duct carcinoma (HBDC) using an immunohistochemical method and evaluated the clinical significance. METHODS Four hundred and twenty three regional lymph nodes from 28 patients with node-negative HBDC who had undergone a resection were immunostained with an antibody against cytokeratins eight and 18 (CAM 5.2). RESULTS Lymph node micrometastasis was detected in 11 of the 28 patients and 14 of the 423 lymph nodes. Lymph node micrometastasis was significantly correlated with the pT classification (p=0.03), the histopathological grading (p=0.01) and venous invasion (p=0.05). The 5-year survival rate of the patients with lymph node micrometastasis was 21.8%, as opposed to 66.5% in the patients without micrometastasis. Patients with micrometastasis showed a significantly poorer survival rate than those without micrometastasis (p=0.02). CONCLUSION The results suggest that immunohistochemically detected lymph node micrometastasis has an impact on the outcome in HBDC.
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Takimoto A, Yagi S, Mitsushima K. High-level expression, purification, and some properties of a recombinant cephalosporin-C deacetylase. J Biosci Bioeng 2005; 87:456-62. [PMID: 16232499 DOI: 10.1016/s1389-1723(99)80094-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/1998] [Accepted: 12/09/1998] [Indexed: 11/30/2022]
Abstract
To maximize the expression of the cephalosporin-C deacetylase (CAH) gene isolated from Bacillus subtilis SHS 0133 in Escherichia coli, a series of expression plasmids was constructed with various spacings between the Shine-Dalgarno sequence and the ATG initiation codon. As the most efficient expression plasmid, we selected pCAH431, which has the trp promoter, a replication origin derived from pAT153, and a spacing of 13 nucleotides. E. coli JM103 with pCAH431 produced 4.9 g of CAH per liter on cultivation at 37 degrees C for 20 h in a 30-l jar fermentor. Since the amount of CAH reached about 70% of the total protein in the soluble fraction of the cells, and CAH was recovered from the cell extracts in an active form, the CAH was purified easily to homogeneity by only one column chromatography step. Twenty grams of 7-aminocephalosporanic acid was completely converted to deacetyl-7-aminocephalosporanic acid, a starting material for cefcapene pivoxil hydrochloride, by 12 mg of the purified enzyme without significant appearance of by-products. Thus, our expression and purification system has made the industrial production of CAH possible.
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Horiguchi K, Yagi S, Ono K, Nishiura Y, Tanaka M, Ishida M, Harigaya T. Prolactin gene expression in mouse spleen helper T cells. J Endocrinol 2004; 183:639-46. [PMID: 15590989 DOI: 10.1677/joe.1.05744] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Prolactin (PRL) is a single-chain polypeptide hormone that is generally secreted from prolactin cells of the anterior pituitary gland into the blood circulation. However, recent studies indicate that the gene expression of prolactin is ectopic in several tissues across several species. These studies found that lymphocytes also produce PRL, which is involved in the immunoregulatory system. Here, we searched for PRL messenger ribonucleic acid (mRNA), using the reverse transcriptase-polymerase chain reaction (RT-PCR) and Southern blotting in the spleens of mice at various growth stages. We also localized mouse prolactin (mPRL) and its mRNA in the spleens of 30- and 60-day-old mice by immunohistochemistry and in situ hybridization respectively. The mPRL gene was expressed in all spleen samples at 0-60 days postpartum. We localized mPRL mRNA in the sheathed artery, periarterial lymphatic sheath and the marginal zone of the spleen. Moreover, we detected mPRL in essentially the same area as its mRNA. Furthermore, we performed double-fluorescence immunohistochemical staining for mPRL and mouse CD4 that is specifically produced in helper T cells, or for mPRL and mouse CD19 or CD40 specified B cells. We colocalized mPRL immunoreactivity only in some CD4-immunopositive cells. These results clearly suggest that T cells synthesize mPRL in the mouse spleen.
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88
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Yagi S, Wakaki N, Ikeda N, Takagi Y, Uchida H, Kato Y, Minamino M. Presence of staphylococcal exfoliative toxin A in sera of patients with atopic dermatitis. Clin Exp Allergy 2004; 34:984-93. [PMID: 15196290 DOI: 10.1111/j.1365-2222.2004.1687.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND It has been reported that the toxins that Staphylococcus aureus produces are associated with the exacerbation of atopic dermatitis (AD). It has been shown in many studies that staphylococcal enterotoxin (SE) A and SEB contribute to AD by humoral immunity through IgE production as a superantigen. On the other hand, little attention has been paid to the relationship between AD and exfoliative toxin x (ETx). OBJECTIVE We investigated the toxins that are frequently detected from the skin of patients and how these toxins affect AD. METHODS S. aureus, isolated from the skin of 100 patients with mild to severe AD, were examined for the producibility of toxins by polymerase chain reaction. Serum samples were obtained from 21 patients with mild and moderate AD. The levels of SEB, ETA, total IgE, specific IgE, and specific IgG in sera were measured by ELISA. RESULTS SEB was most frequently detected from S. aureus on the skin of these patients as previously reported. And ETx, to which little attention has been paid so far, was frequently detected next to SEB. Furthermore, ETA was detected from the sera of almost all the AD patients. SEB was not detected at all. Although the level of ETA in the AD group was significantly higher than that of controls, ETA-specific IgE was not detected from their sera. High levels of ETA tended to be detected from infantile patients. Although there were no significant differences in the levels of ETA-IgG between AD and the controls, its prevalence was more than twice as high as the controls in AD. CONCLUSION These results suggest that many AD patients were exposed to ETx. We conclude that ETx may contribute to exacerbation of AD, particularly in infants, by a mechanism that is not through specific IgE production, unlike SEB.
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Yang Z, Wang J, Kobayashi Y, Lian C, Li S, Sun X, Tan Y, Yagi S, Frenkel E, Hoffman R. 52 Attenuated immunogenicity and toxicity of PEGylated recombinant methioninase (PEG-rMETase) in primates. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)80060-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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90
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Yagi S, Matsumura Y, Soda K, Hashimoto E, Taniguchi M. Interface study for liquid–solid state surface by means of the S K-edge NEXAFS method. SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.1892] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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91
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Lopez-Souza N, Dolganov G, Dubin R, Sachs LA, Sassina L, Sporer H, Yagi S, Schnurr D, Boushey HA, Widdicombe JH. Resistance of differentiated human airway epithelium to infection by rhinovirus. Am J Physiol Lung Cell Mol Physiol 2004; 286:L373-81. [PMID: 14711802 DOI: 10.1152/ajplung.00300.2003] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Virtually all in vitro studies of the effects of rhinovirus on human airway epithelium have used cells grown under conditions known to produce low levels of differentiation. The relevance of the results to native epithelium is questionable. Here we grew primary cultures of human tracheal or nasal epithelium under three conditions. One condition produced pseudostratified, mucociliary cells virtually indistinguishable from native epithelium. The other two conditions produced undifferentiated squamous cells lacking cilia. Cells were infected for 6 h with rhinovirus-16. After a 24-h incubation period, we determined levels of viral RNA in the cells, numbers of infectious viral particles released in the mucosal medium, expression of a variety of epithelial cytokines and other proteins, release of IL-6 and IL-8, and transepithelial electrical resistance and voltage. After infection, levels of viral RNA in the poorly differentiated cells were 30 or 130 times those in the differentiated. Furthermore, expression of mRNA for inflammatory cytokines, release of infectious particles, and release of IL-6 and IL-8 were closely correlated with the degree of viral infection. Thus well-differentiated cells are much more resistant to viral infection and its functional consequences than are poorly differentiated cells from the same source.
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Syed JA, Sardar SA, Yagi S, Tanaka K. Electron spectroscopic investigation of ethylmethylsulfide/nickel interface. SURF INTERFACE ANAL 2003. [DOI: 10.1002/sia.1627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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93
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Rokuhara A, Tanaka E, Matsumoto A, Kimura T, Yamaura T, Orii K, Sun X, Yagi S, Maki N, Kiyosawa K. Clinical evaluation of a new enzyme immunoassay for hepatitis B virus core-related antigen; a marker distinct from viral DNA for monitoring lamivudine treatment. J Viral Hepat 2003; 10:324-30. [PMID: 12823601 DOI: 10.1046/j.1365-2893.2003.00437.x] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We aimed to assess the clinical performance of a newly developed chemiluminescence enzyme immunoassay (CLEIA) for the detection of hepatitis B virus (HBV) core-related antigen (HBcrAg) in patients with chronic HBV infection. A total of 82 patients with chronic HBV infection and 167 HBV-negative controls were studied. HBcrAg was measured by CLEIA with monoclonal antibodies to hepatitis B e antigen (HBeAg) and hepatitis B core antigen (HBcAg), and HBV DNA was measured by transcription-mediated amplification assay (TMA) and in-house real-time detection polymerase chain reaction (RTD-PCR). The HBcrAg assay detected viremia in 189 of 216 samples (88%) collected from 72 patients whilst the TMA assay detected viremia in 178 of the 216 samples (82%) (P = 0.019). The HBcrAg concentration correlated linearly with the HBV DNA concentration (P < 0.001) over a range which varied 100 000-fold. The accuracy in the measurement of the patients' HBV load obtained using the HBcrAg assay was not affected by the absence of hepatitis B e antigen from the serum or the presence of precore mutations in the HBV genome. In patients without anti-viral drugs, changes in their serum HBcrAg concentration over time corresponded to their HBV DNA concentration. In six additional patients who were later treated with lamivudine, HBV DNA concentration declined more rapidly than their HBcrAg concentration. Three months after treatment commenced, the ratio of HBcrAg: HBV DNA had increased in all six patients (P = 0.031). The HBcrAg assay is a sensitive and useful test for the assessment of a patient's HBV load. When monitoring the anti-viral effect of lamivudine, HBcrAg provides a viral marker which is independent of HBV DNA.
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Sardar SA, Syed JA, Yagi S, Tanaka K. Adsorption behaviour of C2H5SCH3 on Ag(111) and Ag(UFP) surfaces. SURF INTERFACE ANAL 2003. [DOI: 10.1002/sia.1628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Yagi S, Kurinaga A, Mima N, Shibata Y, Yamasaki Y, Fukuda Y, Shibuya K, Kawai H, Aoki H. [Gastric antral vascular ectasia accompanied by systemic sclerosis and primary biliary cirrhrosis]. NIHON NAIKA GAKKAI ZASSHI. THE JOURNAL OF THE JAPANESE SOCIETY OF INTERNAL MEDICINE 2001; 90:2488-90. [PMID: 11808188 DOI: 10.2169/naika.90.2488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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96
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Nagaie T, Morita M, Nakagawa M, Itoh S, Aikawa M, Yagi S, Wakiyama S, Kitte T, Shimotakahara A, Kawaguchi A, Wada H, Nakanishi K, Kihara K, Koyanagi N. [A remarkably improved multimetastatic gastric cancer with the use of TS-1 and CDDP]. Gan To Kagaku Ryoho 2001; 28:2069-72. [PMID: 11791387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
A 62-year-old male presented to our hospital with jaundice. On the abdominal ultrasound and abdominal CT, there was evidence of multiple, massive liver metastases with dilatation of intrahepatic bile ducts, thickened wall of the stomach from the body to the antrum, direct invasion to the pancreas, multiple lymph node metastases, and ascites. We believed it was Stage IV and too far advanced for surgery. Therefore, ST-1 60 mg bid was started, and CDDP 50 mg was infused in the seventh week. On the follow-up CT and ultrasound three months later, the thickening of the gastric wall and the lymph node metastasis had improved and the border between the stomach and the pancreas had become clearer. The liver metastases seen on both lobes had decreased significantly both in size and number. The dilatation of the intrahepatic bile ducts disappeared, and the liver function normalized. No side effects were evident during the treatment with the medications.
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Yamada T, Morishita M, Yoshida K, Kinoshita S, Yokoi K, Nakamura M, Morita K, Harada T, Yagi S, Kitagawa S, Nakagawa M. [A case of postoperative gastric cancer responding to adjuvant chemotherapy with TS-1--a novel oral formation of 5-fluorouracil]. Gan To Kagaku Ryoho 2001; 28:1909-12. [PMID: 11729486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
TS-1 is a novel oral formation of 5-fluorouracil, developed using tegafur and two biochemical modulations. We report the case of a patient with multiple lymph node metastases from gastric cancer that markedly responded to TS-1. A 70-year-old man suffering from hematemesis was admitted to our hospital. Computed tomography showed advanced gastric cancer with huge lymph node metastases. After non-curative operation, he received adjuvant chemotherapy with TS-1 for 12 weeks. CT revealed that almost complete reduction of the metastatic nodes was obtained. No serious adverse reactions were observed.
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Yagi S, Matsuzawa J, Hongou K, Yamatani M, Miyawaki T, Konishi T. [Two siblings with eyelid myoclonia with absences]. NO TO HATTATSU = BRAIN AND DEVELOPMENT 2001; 33:517-22. [PMID: 11725520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
We report two siblings with eyelid myoclonia with absences. Patient 1, a 7-year-old boy, visited us because of eyelid blinking resembling a tic. He had experienced the movements since 2 years old. The diagnosis of a simple motor tic was initially made, however, the episodes worsened gradually. Patient 2, a younger brother of patient 1, was a 5-year-old boy. His eyelid blinking also began at age of 2 years. Additionally, the mother's aunt and her cousin had a history of grand mal on awakening, and the patient's cousin has febrile seizures. Their clinical features were as follows; (i) eyelid myoclonia, described as rapid, rhythmic eyelid fluttering with upward jerking of the eyes and head, lasting for 1-2 seconds; (ii) it occurred frequently each day; (iii) when it lasted for more than 2-3 seconds, it was associated with absences; (iv) both hyperventilation and photic stimulation on 18 f/c induced clinical seizures; and (v) ictal EEG revealed 3-4 c/s generalized irregular spike-waves with a duration of 1-3 seconds. Based on these characteristics, a diagnosis of eyelid myoclonia with absences was made. The present cases are the first sibling cases reported in Japan and, according to their family history, a genetic predisposition should be considered.
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Kokawa K, Shikone T, Otani T, Nishiyama R, Ishii Y, Yagi S, Yamoto M. Apoptosis and the expression of Bax and Bcl-2 in hyperplasia and adenocarcinoma of the uterine endometrium. Hum Reprod 2001; 16:2211-8. [PMID: 11574518 DOI: 10.1093/humrep/16.10.2211] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Apoptosis plays a crucial role in carcinogenesis in various tumours. This study was designed to investigate the occurrence of apoptosis and the expression of Bcl-2 and Bax proteins in endometrial tumours of corpus uteri. METHODS Endometrial tissues were obtained from 20 patients with endometrioid adenocarcinoma, 16 patients with endometrial hyperplasia, and 4 patients with myoma uteri (which were used as controls). The occurrence of apoptosis was examined by using molecular biochemical techniques. The expression of Bcl-2 and Bax proteins was also investigated using immunohistochemical staining with appropriate antibodies. RESULTS The labelling of DNA in situ indicated that apoptotic cells were sporadically seen in postmenopausal endometrium (5.2 +/- 2.1, n = 4) and endometrial hyperplasia without atypia (2.6 +/- 0.5, n = 9). In contrast, labelled cells were detected in atypical endometrial hyperplasia (15.9 +/- 2.2, n = 7), and their numbers increased intensely in adenocarcinoma (29.3 +/- 3.7, n = 20). Autoradiographic analysis revealed DNA laddering in many cases of carcinoma. Bcl-2 was highly immunopositive in hyperplasia without atypia (36.2 +/- 6.5%, n = 9), but was decreased in the atypical endometrial hyperplasia (16.3 +/- 4.8%, n = 7). Large fractions of the carcinoma (6.3 +/- 1.8%, n = 20) and normal endometrium (2.8 +/- 1.4%, n = 4) were immunonegative or slightly immunopositive to Bcl-2. In contrast, Bax immunoreactivity was more frequent and stronger in adenocarcinoma (43.6 +/- 4.1%, n = 20) than that in normal endometrium (17.6 +/- 6.7%, n = 4) and hyperplasia (7.2 +/- 2.2%, n = 16). CONCLUSIONS These results suggest that cells in hyperplasia expressing Bcl-2 might have prolonged survival ability. Neoplastic cells in adenocarcinoma might show apoptosis in association with a decreased expression of Bcl-2 and an increased expression of Bax. Therefore, the frequency of apoptosis and the expression of Bcl-2 and Bax might be correlated with carcinogenesis in the uterine endometrium of humans.
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Aoyagi K, Iida K, Ohue C, Matsunaga Y, Tanaka E, Kiyosawa K, Yagi S. Performance of a conventional enzyme immunoassay for hepatitis C virus core antigen in the early phases of hepatitis C infection. Clin Lab 2001; 47:119-27. [PMID: 11294574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
There are periods within the early phase of hepatitis C virus (HCV) infection in which the anti-HCV antibody test is unable to confirm HCV viremia. To reduce the risk of transmitting HCV through transfusions, we developed a simple and highly sensitive enzyme immunoassay (EIA) which detects the core antigen of HCV (HCVcAg). This assay employed a conventional colorimetric EIA system, and was based on a two-step sandwich assay, using a 96- well microplate. The reproducibility of the results was very high. When the cutoff values were set to 30 fmol of recombinant HCVcAg/L, as determined by the distribution of healthy subject sera (n=223), 99.6% of healthy subject sera and 100% of hepatitis B patient sera (n=50) were negative for HCVcAg. The clinical performance of this EIA was examined using 14 commercially available seroconversion panels. In every panel, HCVcAg could be detected at points preceding the seroconversion of anti-HCV antibodies. The points at which HCVcAg was detected were the same as those at which it was detected by an AMPLICOR HCV Monitor test. The EIA's window period for detecting the HCVcAg in all panels was on average 26 days shorter than that of the anti-HCV antibody test. In three panels where the first sample is negative for HCV RNA, the window period was shortened 50 days by this EIA for HCVcAg. There was a positive correlation between the concentration of HCVcAg and HCV RNA in anti-HCV antibody negative specimens. This assay was simpler to perform than assays based on gene amplification technology for the detection of HCV RNA, and the window period was shortened to that of the AMPLICOR HCV Monitor test. Thus, the EIA for HCVcAg would be useful in screening seroconverting donors and could reduce the residual risk of secondary HCV infections through transfusions.
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