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Seki H, Sugimoto R. Evaluation of a colourimetric method for the measurement of oxidation in
butter. Food Res 2022. [DOI: 10.26656/fr.2017.6(2).310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Butter is an emulsion of water in oil containing approximately 25% unsaturated fat. It is
used in various types of cooking because of its delectable flavour. However, oxygen
absorption by the unsaturated fatty acids alters its quality. Therefore, oxidation
measurement is essential for the quality evaluation of butter. Although titrimetric analysis
is mainly used for oxidation measurement in butter, it needs a large quantity of samples
and reagents, and the results lack reproducibility. In this study, the colourimetric method
was evaluated to measure oxidation levels in butter. A comparative analysis of the
standard titrimetric methods and the colourimetric method revealed an increase in the
oxidation levels with an increase in time. The findings demonstrated a positive correlation
between the titrimetric and colourimetric methods. Furthermore, the measurement
accuracy of the colourimetric method was less than 10% (1.7–9.5%) on all examination
days. Overall, these findings suggest the efficiency of the colourimetric method to
measure oxidation in butter with increased accuracy.
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Seki H, Kaneko H, Matsuoka S, Itoh H, Yano Y, Morita K, Kiriyama H, Kamon T, Fujiu K, Michihaka N, Jo T, Takeda N, Morita H, Yasunaga H, Komuro I. Association between blood pressure classification using the 2017 American College of Cardiology/American Heart Association blood pressure guideline and hypertensive retinopathy. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Purpose
We aimed to explore the association of blood pressure (BP) classification using the 2017 American College of Cardiology/ American Heart Association Guideline and the prevalence of hypertensive retinopathy using a nationwide epidemiological database.
Methods
This study is a retrospective observational cross-sectional analysis using the health claims database of the JMDC between 2005 and 2020. We analyzed 280,599 participants who did not take anti-hypertensive medications. Each participant was categorized as having normal BP (systolic BP [SBP] <120 mm Hg and diastolic BP [DBP] <80 mm Hg; n=159,524); elevated BP (SBP 120–129 mm Hg and DBP <80 mm Hg; n=35,603); stage 1 hypertension (SBP 130–139 mm Hg or DBP 80–89 mm Hg; n=54,795); or stage 2 hypertension (SBP ≥140 mm Hg or DBP ≥90 mm Hg; n=30,677). Retinal photography at health check-up was classified as normal, grade 1, grade 2, grade 3, or grade 4 according to the Keith-Wagener-Barker system.
Results
Median (interquartile range) age was 46 (40–53) years, and 50.4% were men. Hypertensive retinopathy which was defined as ≥ Keith-Wagener-Barker system grade 1, was observed in 16,836 participants (6.0%). Multivariable logistic regression analysis showed that, compared with normal BP, elevated BP (odds ratio [OR] 1.30, 95% confidence interval [CI] 1.23–1.38), stage 1 hypertension (OR 1.71, 95% CI 1.64–1.79), and stage 2 hypertension (OR 4.10, 95% CI 3.93–4.28) were associated with higher prevalence of hypertensive retinopathy. Even among 92,121 participants without obesity, high waist circumference, diabetes mellitus, dyslipidemia, cigarette smoking, and alcohol drinking, multivariable logistic regression analysis showed that, compared with normal BP, elevated BP (odds ratio 1.34, 95% CI 1.19–1.51), stage 1 hypertension (OR 1.79, 95% CI 1.61–1.98), and stage 2 hypertension (OR 4.42, 95% CI 4.00–4.92) were associated with higher prevalence of hypertensive retinopathy. The association between BP category and hypertensive retinopathy was observed in all subgroups stratified by age or sex.
Conclusion
Our investigation showed that the prevalence of hypertensive retinopathy increased with the blood pressure category, suggesting that atherosclerotic change could start even in elevated BP and stage 1 hypertension.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): This work was supported by grants from the Ministry of Health, Labour and Welfare, Japan (19AA2007 and H30-Policy-Designated-004) and the Ministry of Education, Culture, Sports, Science and Technology, Japan (17H04141).
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Affiliation(s)
- H Seki
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - H Kaneko
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - S Matsuoka
- New Tokyo Hospital, Department of cardiovascular Medicine, Chiba, Japan
| | - H Itoh
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - Y Yano
- Yokohama City University Hospital, Department of cardiovascular Medicine, Yokohama, Japan
| | - K Morita
- The University of Tokyo, Department of Clinical Epidemiology and Health Economics, School of Public Health, Tokyo, Japan
| | - H Kiriyama
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Kamon
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Fujiu
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - N Michihaka
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Jo
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - N Takeda
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - H Morita
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
| | - H Yasunaga
- Tsukuba University, Department of Health Services Research, Faculty of Medicine, Tsukuba, Japan
| | - I Komuro
- The University of Tokyo, Department of Cardiovascular Medicine, Tokyo, Japan
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Seki H, Sakurai T, Shimizu K, Mizuno S, Tokuda T, Kaburagi T, Seki M, Karahashi T, Nakajima K. Abstract P2-14-09: A novel nipple aleolar complex involvement predictive index (NACPI) for indicating nipple sparing mastectomy in breast cancer patients. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p2-14-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: While Preservation of NAC is concerned to increase the risk of local recurrences in the retroareolar glandular tissue, nipple sparing mastectomy (NSM) is increasing in patients with breast cancer and has been shown to result in better cosmetic outcome and the benefit for quality-of-life. It is necessary to predict accurately NAC involvement in order to select which patients may be candidates to NSM. The distance from the nipple to the tumor (DNT) is proposed as one of the best criteria to select the patient. The purpose of this study is to identify the predictors of NAC involvement retrospectively and to develop a clinical predictive model to select the patients who can be offered preservation of NAC.Methods: A total of 168 patients with primary operable breast cancer who received subcutaneous mastectomy for breast reconstruction at Saitama Medical Center during July 2013 to December 2017 were selected from the hospital's surgical database. NAC involvement was defined by the presence of invasive carcinoma and/or ductal carcinoma in situ at the subareolar margin.
Results: Of the 148 patients who were preserved NAC, 89.9% (133/148) were NAC involvement negative and 10.1% (15/148) were positive in permanent pathological specimens. Of the 20 patients who were resected NAC, NAC involvement positivity was only 50.0% (10/20). This revealed that NAC involvement with a sensitivity (SN) of 40.0%, a specificity (SP) of 93.0%, a positive predictive value (PPV) of 50.0% and a negative predictive value (NPV) of 89.9% (AUC=0.665, 95%CI: 0.5345-0.796). In 140 patients who were performed intraoperative sub-nipple frozen section biopsy, the findings was significantly associated with NAC involvement (P<0.001), and which predict the NAC involvement with a SN of 93.3%, a SP of 89.6%, a PPV of 51.9%, and a NPV of 99.1% (AUC=0.915, 95%CI: 0.835-0.994). In the concordance rate between frozen section findings and definitive pathologic results, DCIS was 53% (9/17), atypical cell was 50% (2/4) and invasive ductal carcinoma was 100% (3/3). Correlation between NAC involvement and clinicopathological factors, tumor size ≥4cm (P<0.001), DNT <1cm by MMG (P=0.002), DNT <1cm by MRI (P<0.001), nipple contrast findings by MRI (P<0.001), tumor in central portion (P<0.001), multicentirc/focal lesion (P<0.001), c(N) positive (P=0.014) were significant relation with NAC involvement. Each predictors were scored 0 or 1, and the total score of 0-3 points was defined as low risk, 4 points as intermediate risk, and 5-7 points as high risk. Depending on this categorized classification, the NAC involvement rate was 3.5% (5/142) in low risk, 68.7% (11/16) in intermediate risk, 90.0% (9/10) in high risk and there was a significant correlation between the risk group and NAC involvement (P <0.001). Notably, assuming that NAC is preserved for low risk patients and is resected for intermediate and high risk patients, NACPI contributes to improve the accuracy of selecting the surgical procedures (SN 80.0%, SP 95.8%, PPV 76.9%, NPV 96.5% (AUC=0.879, 95%CI: 0.784-0.974)).Conclusion: This study suggests that NACPI can help us indicating subcutaneous mastectomy for the breast cancer patients who request preserve NAC with more oncological safety.
Citation Format: Seki H, Sakurai T, Shimizu K, Mizuno S, Tokuda T, Kaburagi T, Seki M, Karahashi T, Nakajima K. A novel nipple aleolar complex involvement predictive index (NACPI) for indicating nipple sparing mastectomy in breast cancer patients [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P2-14-09.
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Affiliation(s)
- H Seki
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - T Sakurai
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - K Shimizu
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - S Mizuno
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - T Tokuda
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - T Kaburagi
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - M Seki
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - T Karahashi
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
| | - K Nakajima
- Saitama Medical Center, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan; Division of Pathology, 4-9-3 Kitaurawa, Urawa City, Saitama, Japan
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Seki H, Sakurai T, Shimizu K. A novel nipple aleolar complex involvement predictive index (NACPI) for indicating nipple sparing mastectomy in breast cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy426.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Xue S, Seki H, Remes M, Šilhár P, Janda K. Examination of α-exosite inhibitors against Botulinum neurotoxin A protease through structure-activity relationship studies of chicoric acid. Bioorg Med Chem Lett 2017; 27:4956-4959. [PMID: 29050781 PMCID: PMC5667901 DOI: 10.1016/j.bmcl.2017.10.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/09/2017] [Accepted: 10/10/2017] [Indexed: 12/20/2022]
Abstract
Botulinum neurotoxins (BoNT) are among the most toxic known substances and currently there are no effective treatments for intraneuronal BoNT intoxication. Chicoric acid (ChA) was previously reported as a BoNT/A inhibitor that binds to the enzyme's α-exosite. Herein, we report the synthesis and structure-activity relationships (SARs) of a series of ChA derivatives, which revealed essential binding interactions between ChA and BoNT/A. Moreover, several ChA-based inhibitors with improved potency against the BoNT/A were discovered.
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Affiliation(s)
- Song Xue
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States; Department of Immunology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Hajime Seki
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States; Department of Immunology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Marek Remes
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States; Department of Immunology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Peter Šilhár
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States; Department of Immunology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Kim Janda
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States; Department of Immunology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States; Worm Institute for Research Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States.
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Seki H, Xue S, Pellett S, Šilhár P, Johnson EA, Janda KD. Cellular Protection of SNAP-25 against Botulinum Neurotoxin/A: Inhibition of Thioredoxin Reductase through a Suicide Substrate Mechanism. J Am Chem Soc 2016; 138:5568-75. [PMID: 27070533 PMCID: PMC4881748 DOI: 10.1021/jacs.5b12929] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 12/26/2022]
Abstract
Botulium neurotoxins (BoNTs) are among the most lethal toxins known to man. They are comprised of seven serotypes with BoNT/A being the most deadly; yet, there is no approved therapeutic for their intoxication or one that has even advanced to clinical trials. Botulinum neurotoxicity is ultimately governed through light chain (LC) protease SNARE protein cleavage leading to a loss of neurotransmitter release. Pharmacological attempts to ablate BoNT/A intoxication have sought to either nullify cellular toxin entry or critical biochemical junctions found within its intricate mechanism of action. In these regards, reports have surfaced of nonpeptidic small molecule inhibitors, but few have demonstrated efficacy in neutralizing cellular toxicity, a key prerequisite before rodent lethality studies can be initiated. On the basis of a lead discovered in our BoNT/A cellular assay campaign, we investigated a family of N-hydroxysuccinimide inhibitors grounded upon structure activity relationship (SAR) fundamentals. Molecules stemming from this SAR exercise were theorized to be protease inhibitors. However, this proposition was overturned on the basis of extensive kinetic analysis. Unexpectedly, inhibitor data pointed to thioredoxin reductase (TrxR), an essential component required for BoNT protease translocation. Also unforeseen was the inhibitors' mechanism of action against TrxR, which was found to be brokered through a suicide-mechanism utilizing quinone methide as the inactivating element. This new series of TrxR inhibitors provides an alternative means to negate the etiological agent responsible for BoNT intoxication, the LC protease.
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Affiliation(s)
| | | | - Sabine Pellett
- Department of Bacteriology, University of Wisconsin , 1550 Linden Drive, Madison, Wisconsin 53706, United States
| | | | - Eric A Johnson
- Department of Bacteriology, University of Wisconsin , 1550 Linden Drive, Madison, Wisconsin 53706, United States
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Vollroth M, Ismail A, Hambsch J, Löffelbein F, Wagner R, Seki H, Dähnert I, Mohr F, Kostelka M, Bakhtiary F. Long-term Results after Bidirectional Glenn Anastomosis in Patients with Hypoplastic Right Heart Syndrome: A Ten-year Single Center Experience. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Vollroth M, Dähnert I, Hambsch J, Seki H, Wagner R, Bellinghausen W, Mohr F, Bakhtiary F, Kostelka M. Extracardiac Total Cavopulmonary Connection (TCPC) without Fenestration: A Single Center Experience in 150 Patients. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rahatianpur M, Bakhtiary F, Seki H, Kostelka M. Long-term Outcomes Following One-stage Repair of Aortic Arch Obstruction Associated with Ventricular Septal Defect. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rahatianpur M, Bakhtiary F, Seki H, Kostelka M. Long-term Outcomes Following Surgical Repair of Persistent Truncus Arteriosus (PTA). Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Seki H, Xue S, Hixon MS, Pellett S, Remes M, Johnson EA, Janda KD. Toward the discovery of dual inhibitors for botulinum neurotoxin A: concomitant targeting of endocytosis and light chain protease activity. Chem Commun (Camb) 2015; 51:6226-9. [PMID: 25759983 DOI: 10.1039/c5cc00677e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Dyngo-4a™ has been found to be an endocytic inhibitor of BoNT/A neurotoxicity through dynamin inhibition. Herein, we demonstrate this molecule to have a previously unrecognized dual activity against BoNT/A, dynamin-protease inhibition. To establish the importance of this dual activity, detailed kinetic analysis of Dyngo-4a's inhibition of BoNT/A metalloprotease as well as cellular and animal toxicity studies have been described. The research presented is the first polypharmacological approach to counteract BoNT/A intoxication.
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Affiliation(s)
- Hajime Seki
- Departments of Chemistry and Immunology and Microbial Sciences, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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Takeuchi M, Ishii K, Seki H, Yasui N, Sakata M, Matsumoto H, Shimada A. 206P Predictability of major complications after gastrectomy for gastric cancer using new surgical Apgar score. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv523.67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Minoshima R, Kosugi S, Nishimura D, Ihara N, Seki H, Yamada T, Watanabe K, Katori N, Hashiguchi S, Morisaki H. Intra- and postoperative low-dose ketamine for adolescent idiopathic scoliosis surgery: a randomized controlled trial. Acta Anaesthesiol Scand 2015; 59:1260-8. [PMID: 26079533 DOI: 10.1111/aas.12571] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 05/09/2015] [Accepted: 05/17/2015] [Indexed: 02/04/2023]
Abstract
BACKGROUND In this randomized controlled trial, we examined whether intra- and postoperative infusion of low-dose ketamine decreased postoperative morphine requirement and morphine-related adverse effects as nausea and vomiting after scoliosis surgery. METHODS After IRB approval and informed consent, 36 patients, aged 10-19 years, undergoing posterior correction surgery for adolescent idiopathic scoliosis, were randomly allocated into two groups: intra- and postoperative ketamine infusion at a rate of 2 μg/kg/min until 48 h after surgery (ketamine group, n = 17) or infusion of an equal volume of saline (placebo group, n = 19). All patients were administered total intravenous anesthesia with propofol and remifentanil during surgery and intravenous morphine using a patient-controlled analgesia device after surgery. The primary outcome was cumulative morphine consumption in the initial 48 h after surgery. Pain scores (Numerical Rating Scale, NRS, 0-10), sedation scales, incidence of postoperative nausea and vomiting (PONV), and antiemetic consumption were recorded by nurses blinded to the study protocol for 48 h after surgery. RESULTS Patient characteristics did not differ between the two groups. Cumulative morphine consumption for 48 h after surgery was significantly lower in the ketamine group compared to the placebo group (0.89 ± 0.08 mg/kg vs. 1.16 ± 0.07 mg/kg, 95% confidence interval for difference between the means, 0.03-0.48 mg/kg, P = 0.019). NRS pain, sedation scales, and incidence of PONV did not differ between the two groups. Antiemetic consumption was significantly smaller in ketamine group. CONCLUSIONS Intra- and postoperative infusion of low-dose ketamine reduced cumulative morphine consumption and antiemetic requirement for 48 h after surgery.
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Affiliation(s)
- R. Minoshima
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - S. Kosugi
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - D. Nishimura
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - N. Ihara
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - H. Seki
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - T. Yamada
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - K. Watanabe
- Department of Orthopaedic Surgery; Keio University School of Medicine; Tokyo Japan
| | - N. Katori
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - S. Hashiguchi
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
| | - H. Morisaki
- Department of Anesthesiology; Keio University School of Medicine; Tokyo Japan
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Georg G, Seki H. 2,3-Dihydropyridin-4(1H)-ones and 3-Aminocyclohex-2-enones: Synthesis, Functionalization, and Applications to Alkaloid Synthesis. Synlett 2014. [DOI: 10.1055/s-0034-1378529] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Seki H, Georg GI. Enantiospecific Synthesis and Biological Investigations of a Nuphar Alkaloid: Proposed Structure of a Castoreum Component (Eur. J. Org. Chem. 18/2014). European J Org Chem 2014. [DOI: 10.1002/ejoc.201490048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Seki H, Georg GI. Enantiospecific Synthesis and Biological Investigations of a Nuphar Alkaloid: Proposed Structure of a Castoreum Component. European J Org Chem 2014; 2014:3777-3783. [PMID: 25395879 DOI: 10.1002/ejoc.201402232] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An enantiospecific synthesis of a Nuphar alkaloid was achieved in 9 steps from N-Boc-(L)-proline. The alkaloid is a minor component of castoreum, the dried scent glands of the beaver. During the course of our study, the stereochemistry of three synthetic intermediates was verified by X-ray analysis, which contributes to resolving existing discrepancies among the literature reports regarding the synthesis of this particular compound. Based on our synthesis, we propose the structure of the natural product. Also, intrigued by castoreum's therapeutic effect, which was used in ancient Greece and Rome for gynecological and other purposes, biological screening was conducted. We found that the alkaloid has affinity for the oxytocin receptor.
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Affiliation(s)
- Hajime Seki
- Departments of Chemistry and Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware St. SE, Minneapolis MN 55414 U.S.A
| | - Gunda I Georg
- Departments of Chemistry and Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware St. SE, Minneapolis MN 55414 U.S.A
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Seki H. The role of the renin–angiotensin system in the pathogenesis of preeclampsia – New insights into the renin–angiotensin system in preeclampsia. Med Hypotheses 2014; 82:362-7. [DOI: 10.1016/j.mehy.2013.12.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 12/31/2013] [Indexed: 10/25/2022]
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Seki H, Pellett S, Silhár P, Stowe GN, Blanco B, Lardy MA, Johnson EA, Janda KD. Synthesis/biological evaluation of hydroxamic acids and their prodrugs as inhibitors for Botulinum neurotoxin A light chain. Bioorg Med Chem 2013; 22:1208-17. [PMID: 24360826 DOI: 10.1016/j.bmc.2013.11.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 11/28/2013] [Indexed: 01/03/2023]
Abstract
Botulinum neurotoxin A (BoNT/A) is the most potent toxin known. Unfortunately, it is also a potential bioweapon in terrorism, which is without an approved therapeutic treatment once cellular intoxication takes place. Previously, we reported how hydroxamic acid prodrug carbamates increased cellular uptake, which translated to successful inhibition of this neurotoxin. Building upon this research, we detail BoNT/A protease molecular modeling studies accompanied by the construction of small library of hydroxamic acids based on 2,4-dichlorocinnamic hydroxamic acid scaffold and their carbamate prodrug derivatization along with the evaluation of these molecules in both enzymatic and cellular models.
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Affiliation(s)
- Hajime Seki
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Sabine Pellett
- Department of Bacteriology, University of Wisconsin, 1550 Linden Drive, Madison, WI 53706, United States
| | - Peter Silhár
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - G Neil Stowe
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Beatriz Blanco
- Centro Singular de Investigación en Química Biológica y Materiales Moleculares (CIQUS), Universidad de Santiago de Compostela, calle Jenaro de la Fuente s/n, 15782 Santiago de Compostela, Spain
| | - Matthew A Lardy
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Eric A Johnson
- Department of Bacteriology, University of Wisconsin, 1550 Linden Drive, Madison, WI 53706, United States
| | - Kim D Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States; Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States.
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19
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Seki H, Bakhtiary F, Vollroth M, Riede T, Daehnert I, Kostelka M. A Single Center Experience of Prosthesis Endocarditis in the Pulmonary Position. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0033-1354522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Silhár P, Eubanks LM, Seki H, Pellett S, Javor S, Tepp WH, Johnson EA, Janda KD. Targeting botulinum A cellular toxicity: a prodrug approach. J Med Chem 2013; 56:7870-9. [PMID: 24127873 DOI: 10.1021/jm400873n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The botulinum neurotoxin light chain (LC) protease has become an important therapeutic target for postexposure treatment of botulism. Hydroxamic acid based small molecules have proven to be potent inhibitors of LC/A with nanomolar Ki values, yet they lack cellular activity conceivably due to low membrane permeability. To overcome this potential liability, we investigated two prodrug strategies, 1,4,2-dioxazole and carbamate, based on our 1-adamantylacetohydroxamic acid scaffold. The 1,4,2-dioxazole prodrug did not demonstrate cellular activity, however, carbamates exhibited cellular potency with the most active compound displaying an EC50 value of 20 μM. Cellular trafficking studies were conducted using a "fluorescently silent" prodrug that remained in this state until cellular uptake was complete, which allowed for visualization of the drug's release inside neuronal cells. In sum, this research sets the stage for future studies leveraging the specific targeting and delivery of these prodrugs, as well as other antibotulinum agents, into neuronal cells.
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Affiliation(s)
- Peter Silhár
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, and The Worm Institute for Research and Medicine, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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21
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Eickmeier O, Seki H, Haworth O, Hilberath JN, Gao F, Uddin M, Croze RH, Carlo T, Pfeffer MA, Levy BD. Aspirin-triggered resolvin D1 reduces mucosal inflammation and promotes resolution in a murine model of acute lung injury. Mucosal Immunol 2013; 6:256-66. [PMID: 22785226 PMCID: PMC3511650 DOI: 10.1038/mi.2012.66] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Acute lung injury (ALI) is a severe illness with excess mortality and no specific therapy. Protective actions were recently uncovered for docosahexaenoic acid-derived mediators, including D-series resolvins. Here, we used a murine self-limited model of hydrochloric acid-induced ALI to determine the effects of aspirin-triggered resolvin D1 (AT-RvD1; 7S,8R,17R-trihydroxy-4Z,9E,11E,13Z,15E,19Z-docosahexaenoic acid) on mucosal injury. RvD1 and its receptor ALX/FPR2 were identified in murine lung after ALI. AT-RvD1 (~0.5-5 μg kg(-1)) decreased peak inflammation, including bronchoalveolar lavage fluid (BALF) neutrophils by ~75%. Animals treated with AT-RvD1 had improved epithelial and endothelial barrier integrity and decreased airway resistance concomitant with increased BALF epinephrine levels. AT-RvD1 inhibited neutrophil-platelet heterotypic interactions by downregulating both P-selectin and its ligand CD24. AT-RvD1 also significantly decreased levels of BALF pro-inflammatory cytokines, including interleukin (IL)-1β, IL-6, Kupffer cells, and tumor necrosis factor-α, and decreased nuclear factor-κB-phosphorylated p65 nuclear translocation. Taken together, these findings indicate that AT-RvD1 displays potent mucosal protection and promotes catabasis after ALI.
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Affiliation(s)
- O. Eickmeier
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - H. Seki
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - O. Haworth
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - JN. Hilberath
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - F. Gao
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - M. Uddin
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - RH. Croze
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - T. Carlo
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - MA. Pfeffer
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - BD. Levy
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA,Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA,Corresponding author: Bruce D. Levy, MD, Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women’s Hospital and Harvard Medical School, Harvard Institutes of Medicine Bldg, 77 Avenue Louis Pasteur (HIM 855), Boston, MA 02115, USA, Phone: 617-525-5407, Fax: 617-525-5413,
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Seki H, Hayashida T, Jinno H, Takahashi M, Hirose S, Mukai M, Kitagawa Y. AOSP9 HOXB9, A GENE PROMOTING TUMOUR ANGIOGENESIS AND PROLIFERATION, IS SIGNIFICANTLY ASSOCIATED WITH POOR CLINICAL OUTCOMES IN ER-POSITIVE BREAST CANCER PATIENTS. Eur J Cancer 2013. [DOI: 10.1016/s0959-8049(13)70023-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Yona M, Tadano C, Shimose R, Sugawara H, Macdonald G, Asami S, Seki H, Naito Y, Muro M. Effects on V-wave with skin and muscle cooling during %MVC. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Macdonald G, Asami S, Shimose R, Sugawara H, Tanaka M, Tadano C, Seki H, Naito Y, Yona M, Muro M. Relationship between fatigue and EMG activity in triceps surae during isometric plantar flexion. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Okabe H, Makino S, Kato K, Matsuoka K, Seki H, Sugimura M, Takeda S. W121 A ROLE OF SENESCENCE IN THE PROCESS OF PRE-TERM DELIVERY INDUCED BY IL-1β. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61846-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Matsumura H, Murayama Y, Ono Y, Matsunaga S, Nagai T, Takai Y, Saito M, Takagi K, Baba K, Seki H. M472 SUCCESSFUL USE OF ABSORBABLE SYNTHETIC SUTURE MATERIAL (PDSII) FOR CERVICAL INSUFFICIENCY. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61660-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Nakamura Y, Iwazaki M, Yasui N, Seki H, Matsumoto H, Masuda R, Nishiumi N, Shimada A. Diaphragmatic repair of hepatic hydrothorax with VATS after abdominal insufflation with CO(2). Asian J Endosc Surg 2012; 5:141-4. [PMID: 22823172 DOI: 10.1111/j.1758-5910.2012.00133.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hepatic hydrothorax is defined as the presence of a significant pleural effusion that develops in a patient with cirrhosis of the liver who does not have an underlying cardiac or pulmonary disease. There have been few published case reports dealing with hepatic hydrothorax treated surgically. Recently, we treated a patient with refractory hepatic hydrothorax by directly suturing the diaphragmatic defect during VATS. During surgery, the diaphragmatic defect was identified by using abdominal insufflation with CO(2) . The defect was sutured and the diaphragm was covered by polyglycolic acid felt and fibrin glue. After surgery, the patient's pleural effusion improved, his postoperative course was uneventful and he did not require a drainage tube at discharge.
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Affiliation(s)
- Y Nakamura
- Department of Surgery, Keiyu Hospital, Yokohama, Japan.
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28
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Fukushima K, Tsukimori K, Li D, Takao T, Morokuma S, Kato K, Seki H, Takeda S, Matsumura S, Wake N. Effect of transient TCDD exposure on immortalized human trophoblast-derived cell lines. Hum Exp Toxicol 2011; 31:550-6. [PMID: 22027506 DOI: 10.1177/0960327111424305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Low level, antenatal exposure to dioxins is associated with low birth weight, which in turn is associated with long-term sequelae. We exposed the human extravillous cytotrophoblast (EVT) lines HTR-8/SV40 and TCL1 to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and assessed cell growth, invasion, and differentiation. TCDD had no effect on cell proliferation, invasion, or tube formation in Matrigel. The EVT-derived cells expressed a functional aryl hydrocarbon receptor protein; however, TCDD exposure did not alter expression levels of proteins involved in EVT differentiation in early pregnancy, including hypoxia-inducible factor 1A (HIF1A), vascular endothelial growth factor (VEGF), Integrin A1, A6, and AVB3. These results suggest that the reduction in fetal weight induced by dioxin is not the result of vascular remodeling via EVT dysfunction.
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Affiliation(s)
- K Fukushima
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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29
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Seki H, Hayashida T, Jinno H, Hirose S, Takahashi M, Mukai M, Kitagawa Y. HOXB9, a gene promoting tumor angiogenesis and proliferation, as a prognostic factor in breast cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.27_suppl.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
33 Background: We demonstrated that HOXB9, a member of homeobox genes, expression promoted tumor neovascularization and metastasis in vitro and in vivo assay. These findings imply that overexpression of HOXB9 contributes to tumor progression through activation of signaling pathways that alter both tumor-specific cell fates and tumor-stromal microenvironment, leading to increased invasion and metastasis. (Hayashida et al., PNAS 2010) We sought to determine whether these results could be extended to the clinical application. In this study, we evaluated the correlation between HOXB9 expression, clinical outcomes, and the clinicopathological variables in breast cancer patients, and the contribution of HOXB9 expression to tumor cell proliferation and angiogenesis. Methods: A consecutive series of 141 patients with invasive ductal carcinoma who underwent surgical treatment were examined. HOXB9 protein expression was analyzed immunohistochemically using the anti-human HOXB9 polyclonal antibody. Immunostaining of Ki-67, CD31, and CD34 were performed to evaluate the association of proliferation and tumor angiogenesis with HOXB9 expression. Results: Of 141 tumor specimens immunostained for HOXB9, 69 specimens (48.9%) were positive staining. Univariate logistic regression revealed ER and PgR negativity, HER2 positivity, high nuclear grade, and large pathological tumor size as significant variables associated with HOXB9 expression. Moreover, 12 (92.3%) out of 13 triple negative breast cancer showed HOXB9 expression. The disease-free survival (DFS) and the overall survival were significantly different between the HOXB9 positive and negative group; HR=20.714, p=0.001, HR 9.206, p=0.003, respectively. A Multivariate analysis indicated that HOXB9 expression was the only independent prognostic factor for DFS (HR=15.532, p=0.009). In subgroup analysis, HOXB9 positive tumors showed a significant increase in the number of vasculature and the Ki-67 ratio in comparison with HOXB9 negative. Conclusions: Our results suggest that HOXB9 expression promoting the tumor proliferation and the angiogenesis is a significant prognostic factor in breast cancer.
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Affiliation(s)
- H. Seki
- Keio University School of Medicine, Tokyo, Japan
| | - T. Hayashida
- Keio University School of Medicine, Tokyo, Japan
| | - H. Jinno
- Keio University School of Medicine, Tokyo, Japan
| | - S. Hirose
- Keio University School of Medicine, Tokyo, Japan
| | - M. Takahashi
- Keio University School of Medicine, Tokyo, Japan
| | - M. Mukai
- Keio University School of Medicine, Tokyo, Japan
| | - Y. Kitagawa
- Keio University School of Medicine, Tokyo, Japan
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Hayashida T, Jinno H, Seki H, Takahashi M, Sakata M, Hirose S, Mukai M, Kitagawa Y. The relationship of HOXB9 expression promoting tumor cell proliferation and angiogenesis to clinical outcomes of patients with breast cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.10546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Abstract
Cyclic six-membered enaminones were synthesized from three components (bromodiazoacetone, primary amine, and alkyne) in high yields via aza-Michael addition, Wolff rearrangement, and nucleophilic ketene cyclization.
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Affiliation(s)
- Hajime Seki
- Department of Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55414, United States
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32
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Seki H, Georg GI. Synthesis of amino acid derived enaminones via Wolff rearrangement using vinylogous amides as carbon nucleophiles. J Am Chem Soc 2011; 132:15512-3. [PMID: 20958040 DOI: 10.1021/ja107329k] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cyclic enaminones were synthesized in high yields from amino acids in two steps via Wolff rearrangement. The cyclization represents a rare 6-exo-dig cyclization involving a ketene as an electrophile. No racemization was observed during this reaction.
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Affiliation(s)
- Hajime Seki
- Department of Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55414, USA
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33
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Meijer G, Bethune DS, Tang WC, Rosen HJ, Johnson RD, Wilson RJ, Chambliss DD, Golden WG, Seki H, De Vries MS, Brown CA, Salem JR, Hunziker HE, Wendt HR. Laser Deposition, Vibrational Spectroscopy, NMR Spectroscopy and Stm Imaging of C60 and C70. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-206-619] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe recently demonstrated that C60 and C70, as well as other fullerenes, can be deposited and accumulated on surfaces using laser ablation of graphite in an Inert gas atmosphere. After learning of the work of Krätschmer et al. indicating the presence of C60 in carbon soot, we showed that samples consisting almost exclusively of C60 and C70 can be sublimed from such soot. Vibrational Raman spectra of C60 and C70 were obtained from these samples. The C60 spectrum Is consistent with the calculated spectrum of Buckmlnsterfullerene, and the strongest three lines can be assigned on the basis of frequency and polarization. The NMR spectrum of dissolved C60 was then obtained, and found to consist of a single resonance, establishing the icosahedral symmetry of this molecule. STM images of the C60 molecules on a Au(111) crystal face show that these clusters form hexagonal arrays with an intercluster spacing of 11.0 Å and are mobile at ambient temperature. Distinctly taller species evident in the arrays are believed to be C70 clusters. Vibrational Raman and infrared spectra have also been obtained for separated C60 and C70.
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34
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Sakata M, Jinno H, Hayashida T, Takahashi M, Sato T, Seki H, Shimada K, Nishiya S, Kitagawa Y. Abstract P5-10-13: Phase I Dose Escalation Study of Pirarubicin in Combination with Cyclophosphamide in Breast Cancer. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p5-10-13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Doxorubicin containing combination chemotherapy regimens are widely used for treatment of breast and other cancers. However, these regimens are associated with significant toxicities including myocardialdysfunction and alopecia. Analogues of doxorubicin are being developed to reduce these side effects. Pirarubicin is a more lipophilic derivative of doxorubicin, with a higher uptake rate of cells, lower cardiotoxicity and better antitumor efficacy in preclinical models.
Purpose: We conducted a single-institution phase I clinical trial to determine the maximum-tolerated dose (MTD) and define the toxic effects and recommended dose (RD) of pirarubicin in combination with cyclophosphamide in patients with breast cancer. Patients and Methods: Patients who had received prior anthracycline therapy were excluded. Cohorts of three patients with breast cancer were treated with escalating doses of pirarubicin (40 to 70 mg/m2) intravenously administered every three weeks in combination with cyclophosphamide (60 mg/m2) for 4 or more cycles.
Results: Eleven patients of stage I/II operable breast cancer received a total of 46 cycles of pirarubicin and cyclophosphamide as post-operative adjuvant chemotherapy. The most frequently reported treatment-related grade 2 adverse events were constipation (36%) and nausea (27%). There were no grade 3/4 events. Grade 2 leukocytopenia and grade 2 fatigue were dose-limiting at 70 mg/m2, the maximum-tolerated dose was 60 mg/m2. Grade 2 alopecia was reported in 60 and 70 mg/m2 pirarubicin group. Conclusion: At the MTD of 60 mg/m2 every 3 weeks, pirarubicin in combination with cyclophosphamide was associated with mild, reversible toxicity. The recommended phase II dose is pirarubicin 50 mg/m2 and cyclophosphamide 60 mg/m2 on day 1 every 21 days.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P5-10-13.
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Affiliation(s)
- M Sakata
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - H Jinno
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - T Hayashida
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - M Takahashi
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - T Sato
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - H Seki
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - K Shimada
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - S Nishiya
- Keio University School of Medicine, Tokyo, Tokyo, Japan
| | - Y. Kitagawa
- Keio University School of Medicine, Tokyo, Tokyo, Japan
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35
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Seki H, Hayashida T, Jinno H, Takahashi M, Sakata M, Hirose S, Mukai M, Kitagawa Y. Abstract P4-07-07: HOXB9 Expression as a New Independent Prognostic Factor in Human Breast Cancer. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p4-07-07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: There are several reports showing a HOX gene family, which plays the critical roles for the differentiation during the embryonic stage, is associated with the tumorigenicity. It was demonstrated that HOXB9 is overexpressed in 42% of breast cancers, specifically those with high histological grade, and we defined the functional consequences of elevated HOXB9 expression in breast cancer. Moreover, HOXB9 expression promotes increased neovascularization and tumor metastasis to the lung in mouse xenograft models (Hayashida et al., PNAS, 2010). The puropose of this report is to evaluate the correlation between HOXB9 and clinicopathological variables in breast cancer patients. Patients and methods: A consecutive series of 141 patients with invasive ductal carcinoma who underwent surgical treatment at Keio University Hospital from January 2004 to January 2005 was involved. HOXB9 expression was analyzed immunohistochemically on formalin-fixed, paraffin-embedded tumor sections using rabbit anti-human HOXB9polyclonal antibody. Moreover, immunohistochemical stainings for Ki-67, CD31, and CD34 were also performed to evaluate the association with HOXB9 expression.
Results: The age at the diagnosis ranged from 30 to 93 years (median age, 58 years), and median observation period was 62.2 months. Of 141 tumor specimens immunostained for HOXB9, 69 specimens (48.9%) were positive staining. Univariate logistic regression revealed ER negativity (P<0.001), PR negativity (P<0.001), HER2 positivity (p=0.031), high nuclear grade (P<0.001) and large pathological tumor size (p=0.002) as significant variables associated with HOXB9 expression. Notably, 12 (92. 3%) out of 13 triple negative breast cancer showed HOXB9 expression. The disease-free survival (DFS) at 5 year and the overall survival at 5 year were significantly different between the HOXB9 positive group and HOXB9 negative group; HR=8.5, 95%CI 3.3-21.9, p=0.001, HR 3.8, 95%CI 1.5-9.6, p=0.003, respectively. A Multivariate analysis indicated that HOXB9 expression was the independent prognostic factor for DFS (HR=14.1, 95% CI 1.851 to 107.4, p=0.011). Since HOXB9 expression accelerates the tumor angiogenesis in vitro and in vivo, we also evaluated the expression of vascular endothelial marker, CD31 and CD34 and cellular proliferation marker, Ki-67 in 45 patients with clinical T2 (tumor size, 2 to 5cm) tumor. In this subgroup analysis, HOXB9 positive patients (n=22) showed increased number of vasculature and Ki-67 ratio in comparison with HOXB9 negative patients (n=23) with statistical significance.
Correlations between HOXB 9 expression and Ki-67, CD31 and CD 34
Conclusion: The data identify HOXB9 expression as a new independent prognostic factor in breast cancer, which might help to improve the selection for appropriate therapy. Possibly, it might be useful to determine the application of anti-angiogenic therapy.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P4-07-07.
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Affiliation(s)
- H Seki
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
| | - T Hayashida
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
| | - H Jinno
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
| | - M Takahashi
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
| | - M Sakata
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
| | - S Hirose
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
| | - M Mukai
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
| | - Y. Kitagawa
- Keio University School of Medicine, Shinjyuku, Tokyo, Japan
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36
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Abstract
The biomass of microorganisms in the digestive tracts of young salmon in the sea of Saanich Inlet was examined by (i) the direct microscopic method, (ii) the plate count method and (iii) the physiological method (microbial biomass assumed from the release of carbon dioxide). By all methods, most microbial biomass in foods was shown to decrease during its stay in the digestive organ. This observation was supported by the detection of many bacteria at different stages of digestion. The microbial biomass was quantitatively influenced by the composition of food ingested and by the sampling time.
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Affiliation(s)
- H Seki
- Fisheries Research Board of Canada, Pacific Oceanographic Group, Biological Station, Nanaimo, British Columbia, Canada
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37
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Abstract
Microbial biomass on suspended organic matter in seawater of the euphotic zone of Saanich Inlet was investigated. The viable microorganisms were measured by the glucose-uptake method. Microbial carbon on particulate organic matter in seawater was determined to be, on the average, 9.9 mug of C/liter, and there was a regression relationship as y = 0.0062 x - 1.79 with an unbiased variance V(yx) = 0.38, where x = particulate organic carbon in seawater (micrograms of C/liter) and y = logarithm of microbial carbon (micrograms of C/liter).
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Affiliation(s)
- H Seki
- Ocean Research Institute, University of Tokyo, Nakano, Tokyo, Japan
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38
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Deguchi M, Shinjo R, Yoshioka Y, Seki H. The usefulness of serum amyloid A as a postoperative inflammatory marker after posterior lumbar interbody fusion. ACTA ACUST UNITED AC 2010; 92:555-9. [DOI: 10.1302/0301-620x.92b4.22807] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The post-operative changes in the serum levels of CRP and serum amyloid A (SAA) were investigated prospectively in 106 patients after posterior lumbar interbody fusion. In 96 patients who did not have complications related to infection within the first year after operation, the median levels of CRP before operation and on days 3, 7 and 13 after were 0.02 (0.01 to 0.03), 9.12 (2.36 to 19.82), 1.64 (0.19 to 6.10) and 0.53 (0.05 to 2.94) mg/dl, respectively and for SAA, 2.6 (2.0 to 3.8), 1312.1 (58.0 to 3579.8), 77.3 (1.8 to 478.4), 14.1 (0.5 to 71.9) μg/ml, respectively. The levels on day 3 were the highest for both CRP and SAA and significantly decreased (p < 0.01) by day 7 and day 13. In regard to CRP, no patient had less than the reference level (0.1 mg/dl) on day 7. In only three had the level decreased to the reference level, while in 93 it was above this on day 13. However, for SAA, the levels became normal on day 7 in 10 cases and on day 13 in 34 cases. The ratios relative to the levels on day 3 were significantly lower for SAA compared with CRP on day 7 and day 13. Of the ten patients with infection in the early stages, the level of CRP decreased slightly but an increase in SAA was observed in six. We concluded that SAA is better than CRP as a post-operative inflammatory marker.
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Affiliation(s)
- M. Deguchi
- Department of Orthopaedic Surgery Nagano Red Cross Hospital, 5-22-1 Wakasato, Nagano 380-8582, Japan
| | - R. Shinjo
- Department of Orthopaedic Surgery Nagano Red Cross Hospital, 5-22-1 Wakasato, Nagano 380-8582, Japan
| | - Y. Yoshioka
- Department of Orthopaedic Surgery Nagano Red Cross Hospital, 5-22-1 Wakasato, Nagano 380-8582, Japan
| | - H. Seki
- Department of Orthopaedic Surgery Nagano Red Cross Hospital, 5-22-1 Wakasato, Nagano 380-8582, Japan
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39
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Hayashida T, Jinno H, Sakata M, Takahashi M, Onishi T, Seki H, Sato T, Nakahara T, Shigematsu N, Mukai M, Hibi T, Kitajima M, Kitagawa Y. Superiority of Radioisotope over Blue Dye for Sentinel Lymph Node Detection in Breast Cancer. Eur Surg Res 2010; 44:111-6. [DOI: 10.1159/000277937] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 11/16/2009] [Indexed: 11/19/2022]
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40
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Nakase J, Toribatake Y, Mouri Y, Seki H, Kitaoka K, Tomita K. Heparin versus danaproid for prevention of venous thromboembolism after hip surgery. J Orthop Surg (Hong Kong) 2009; 17:6-9. [PMID: 19398784 DOI: 10.1177/230949900901700102] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
PURPOSE To compare the prevalence of deep vein thrombosis (DVT), pulmonary thromboembolism (PTE), and bleeding complications in patients receiving heparin or danaproid after hemiarthroplasty or osteosynthesis for hip fractures. METHODS 37 men and 138 women aged 47 to 100 (mean, 80) years underwent either hemiarthroplasty or osteosynthesis for hip fractures; 5 patients with dementia were excluded. All patients received preoperative elastic stocking and postoperative intermittent pneumatic compression. They were divided into 3 groups based on their admission period: controls (n=71), unfractionated heparin (n=44), and danaproid sodium (n=55). Drugs were administered from postoperative day 1 to 7. At day 7, all patients undertook radioisotope venography of the legs and lung perfusion scintigraphy. RESULTS In the control, heparin, and danaproid groups respectively, the DVT rates were 31%, 9.1%, and 5.5%, and the PTE rates were 5.6%, 4.5%, and 1.8%. Only the DVT rate in the control group was significantly higher than that in the heparin and danaproid groups. In the heparin group, one patient had gastrointestinal bleeding, 5 developed wound haematomas, and one had leakage from the drain site for 2 weeks. CONCLUSION Danaproid sodium appeared more effective and safer than heparin, with no bleeding complications occurred.
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Affiliation(s)
- J Nakase
- Department of Orthopedics, Kouseiren-Takaoka Hospital, Takaoka, Toyama, Japan.
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41
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Kochi T, Urano S, Seki H, Mizushima E, Sato M, Kakiuchi F. Ruthenium-Catalyzed Amino- and Alkoxycarbonylations with Carbamoyl Chlorides and Alkyl Chloroformates via Aromatic C−H Bond Cleavage. J Am Chem Soc 2009; 131:2792-3. [DOI: 10.1021/ja8097492] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takuya Kochi
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan, and PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
| | - Seiya Urano
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan, and PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
| | - Hajime Seki
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan, and PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
| | - Eiichiro Mizushima
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan, and PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
| | - Mitsuo Sato
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan, and PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
| | - Fumitoshi Kakiuchi
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan, and PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
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42
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Fukushima K, Murata M, Hachisuga M, Tsukimori K, Seki H, Takeda S, Kato K, Wake N. Gene Expression Profiles by Microarray Analysis during Matrigel-induced Tube Formation in a Human Extravillous Trophoblast Cell line: Comparison with Endothelial Cells. Placenta 2008; 29:898-904. [DOI: 10.1016/j.placenta.2008.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2008] [Revised: 07/31/2008] [Accepted: 07/31/2008] [Indexed: 01/20/2023]
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43
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Kumagai Y, Kotanagi H, Ishida H, Komatsuda T, Furukawa K, Yamada M, Ohuchi S, Seki H, Sakusabe M. Gallbladder adenoma: report of a case with emphasis on contrast-enhanced US findings. ACTA ACUST UNITED AC 2006; 31:449-52. [PMID: 16447086 DOI: 10.1007/s00261-005-0393-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
There is a marked paucity of contrast-enhanced ultrasound (US) findings of gallbladder disease in the literature, and there is only one previous case of gallbladder adenoma. We report such a case. US showed a 2-cm polypoid lesion at the gallbladder body. Color Doppler US showed the hypervascular nature of the lesion, and contrast-enhanced US revealed the lesion to be homogeneously enhanced, suggesting that the lesion was composed of the same pathology. The lesion was surgically resected, and was found to be an adenoma without cancer foci. This case suggests that contrast-enhanced US is an effective tool in diagnosing a gallbladder adenoma.
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Affiliation(s)
- Y Kumagai
- Department of Surgery, Red Cross Hospital, 222-1 Inashirozawa Saruta Kamikitade, Akita, Japan
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44
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Kumagai Y, Kotanagi H, Ishida H, Komatsuda T, Furukawa K, Ohuchi S, Seki H, Sakusabe M. Duodenal adenoma with production of massive mucus: report of a case with emphasis on US findings. ACTA ACUST UNITED AC 2005; 31:36-8. [PMID: 16245013 DOI: 10.1007/s00261-005-0375-8] [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: 10/25/2022]
Abstract
Duodenal adenoma with massive mucus production is very rare. We report such a case. Ultrasonography (US) showed the presence of massive mucus, and contrast- enhanced US revealed the thickened wall to be homogeneously enhanced, suggesting that the lesion was composed of the same pathology. The US results were confirmed histologically by endoscopically guided biopsy. Thus, contrast-enhanced US helps determine the biopsy point and determine good diagnostic strategies.
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Affiliation(s)
- Y Kumagai
- Department of Surgery, Akita Red Cross Hospital, 222-1 Inashirozawa Saruta Kamikitade, Akita, Japan
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45
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Seki H, Fukuda M, Iino M, Takahashi T, Yoshioka N. Immunohistochemical localization of cyclooxygenase-1 and -2 in synovial tissues from patients with internal derangement or osteoarthritis of the temporomandibular joint. Int J Oral Maxillofac Surg 2004; 33:687-92. [PMID: 15337183 DOI: 10.1016/j.ijom.2004.01.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2004] [Indexed: 10/26/2022]
Abstract
This study examined the immunohistochemical expression and localization of cyclooxygenase-1 and -2 (COX-1 and COX-2) in synovial tissues from patients with internal derangement (ID) or osteoarthritis (OA) of the temporomandibular joint (TMJ). Synovial tissues from patients with condylar fractures of the mandible were studied as control. Synovial tissues from 13 TMJs of 10 patients with ID or OA and from 5 TMJs of 4 patients with fractures were examined for COX-1 and COX-2 expression by immunohistochemical staining using two monoclonal antibodies. In addition, whether the COX-2 expression grade correlated with the synovitis score and clinical findings was assessed. COX-2 was expressed in the synovial lining, infiltrating mononuclear cells, fibroblast-like cells, and blood vessels, including CD31-positive endothelial cells, in the synovium of patients with ID or OA. Expression levels of COX-1 in synovial lining cells and endothelial cells were similar in the specimens obtained from the patients with ID or OA and those obtained from the controls. The expression of COX-2 positively correlated with arthroscopic findings of synovitis (p = 0.55, P = 0.023) and with joint pain (p = 0.56, P = 0.021). These results suggest that up-regulation of COX-2 in synovium may play a part in the pathogenesis of synovitis in patients with ID or OA of the TMJ.
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Affiliation(s)
- H Seki
- Division of Dentistry and Oral Surgery, Akita University School of Medicine, 1-1-1 Hondo, Akita City, Akita 010-8543, Japan.
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46
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Affiliation(s)
- H Seki
- Kizukisumiyoshi-Cho, Nakahara-Ku, Kawasaki, Kanagawa, Japan.
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47
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Abstract
Accumulating evidence indicates that cerebral processing of consonants and vowels is separable. It has been shown that disordered temporal acuity leads to disturbed consonant perception in cases with pure word deafness. In contrast, there has been no clear explanation of how vowel perception is impaired. We examined a patient with auditory agnosia, who showed a differential ability to identify the five Japanese vowels after bilateral cerebral lesions. He correctly identified the vowel [a] in more than 70% of auditory presentations, whereas he identified [i] in only about 30% of presentations. The difference between the first and second formant frequencies "F2-F1" and an artificially defined value "F1-(F2-F1)" for each vowel correlated significantly with the percentage of correct identifications. These findings support the hypothesis that vowel perception is based on formant interactions.
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Affiliation(s)
- K Tanji
- Division of Neuropsychology, Department of Disability Medicine, Tohoku University School of Medicine, Sendai, Japan.
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48
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Koinuma M, Seki H, Matsumoto Y. Photoelectrochemical properties of layered niobate (K4Nb6O17) films prepared by electrophoretic deposition. J Electroanal Chem (Lausanne) 2002. [DOI: 10.1016/s0022-0728(02)01049-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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49
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Abstract
This report describes a case of spontaneous esophageal perforation that was considered to be etiologically related to a duodenal ulcer with pyloric stenosis. The patient was a 54-year-old Japanese man who presented following the sudden onset of severe abdominal pain and dyspnea after an episode of vomiting. He had a history of duodenal ulcer. Computed tomography revealed an extremely dilated stomach containing abundant food residue, intraabdominal effusion, bilateral pleural effusion, and mediastinal emphysema, findings that strongly suggested esophageal perforation. Esophagoscopy confirmed perforation of the lower esophagus. Laparotomy revealed marked contamination, including food residue in the abdominal cavity, and a severely dilated stomach attributed to pyloric stenosis caused by a duodenal ulcer. A 2-cm longitudinal perforation was found on the right side of the lower esophagus. Because the patient's general condition was too poor to tolerate a one-stage operation (primary closure of the perforation, gastrectomy, and reconstruction), we initially performed decompression gastrostomy and control of the esophageal leakage with T-tube placement. Following the T-tube was removed 1 month later, distal gastrectomy and reconstruction of the gastrojejunostomy (Billroth II method) could be safely performed.
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Affiliation(s)
- H Seki
- Department of Surgery, Hokushu Chuo Hospital, Takanosu, Akita, Japan
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50
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Seki H, Saitoh S, Hata Y, Murakami N, Shimizu T, Takaoka K. Callus resection for brachial plexus compression following stress-induced first rib fracture. J Hand Surg Br 2002; 27:293-5. [PMID: 12074622 DOI: 10.1054/jhsb.2002.0753] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A 27-year-old man presented with a lower trunk brachial plexus injury due to excessive callus formation following a stress-induced first rib fracture. The callus, but not the first rib, was resected through a supraclavicular approach. His symptoms resolved in 2 months, and no recurrence was seen at 2 years follow-up.
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Affiliation(s)
- H Seki
- Department of Orthopaedics, Shinshu University School of Medicine, Matsumoto City, Japan
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