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Maemura K, Ikeda Y, Eda Y, Oki T, Yazaki M, Fujita T, Iida Y, Nabeta T, Ishii S, Koriyama K, Maekawa E, Koitabashi T, Ako J. Association between lowering heart rate during IMPELLA support and favorable short-term outcome in patients with cardiogenic shock. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1537] [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: 11/13/2022] Open
Abstract
Abstract
Background
Impella has been increasingly used in patients with cardiogenic shock (CGS). Target values for clinical indices for appropriate management of Impella have not yet been established.
Purpose
We aimed to elucidate the association between heat rate (HR) during Impella treatment in patients with CGS and clinical outcomes.
Methods and results
We retrospectively evaluated 62 patients (68±14 years; male 77%) with CGS receiving temporary circulatory support with the Impella between February 1, 2019, and February 31, 2021. The primary end point was 30-day mortality. Clinical characteristics, laboratory and hemodynamic markers at implantation of Impella (baseline), 12, 24 hr after implantation, and removal of Impella were assessed. There were 28 patients with concomitant use of extracorporeal membrane oxygenation (ECMO). Treatment periods using Impella were 8±6 days. After excluding 11 patients who died during Impella support, the relationship between clinical indicators at each time points and 30-day mortality was evaluated. There were 22 patients (43%) with 30-day mortality. Factors associated with 30-day mortality were: female, ECMO, higher 24-hr lactate level, lower 24-hr cardiac power output, and higher HR at removal. Lower HR of ≤81 bpm at removal was found to most accurately predict lower 30-day mortality (Figure 1). Higher increases in dose of beta-blockers during Impella support and lower absolute doses of norepinephrine at removal were correlated with decreases in HR during Impella support.
Conclusions
In patients with CGS treated with Impella, lower HR at removal was associated with lower incidence of 30-day mortality. Lowering HR during Impella treatment was recognized as a simple indicator for favorable clinical outcomes in patients with CGS. It was suggested that chronotropic interventions during Impella treatment may be novel therapeutic options in patients with CGS.
Funding Acknowledgement
Type of funding sources: None. Figure 1
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Affiliation(s)
- K Maemura
- Kitasato University School of Medicine, Kanagawa, Japan
| | - Y Ikeda
- Kitasato University School of Medicine, Kanagawa, Japan
| | - Y Eda
- Kitasato University School of Medicine, Kanagawa, Japan
| | - T Oki
- Kitasato University School of Medicine, Kanagawa, Japan
| | - M Yazaki
- Kitasato University School of Medicine, Kanagawa, Japan
| | - T Fujita
- Kitasato University School of Medicine, Kanagawa, Japan
| | - Y Iida
- Kitasato University School of Medicine, Kanagawa, Japan
| | - T Nabeta
- Kitasato University School of Medicine, Kanagawa, Japan
| | - S Ishii
- Kitasato University School of Medicine, Kanagawa, Japan
| | - K Koriyama
- Kitasato University School of Medicine, Kanagawa, Japan
| | - E Maekawa
- Kitasato University School of Medicine, Kanagawa, Japan
| | - T Koitabashi
- Kitasato University School of Medicine, Kanagawa, Japan
| | - J Ako
- Kitasato University School of Medicine, Kanagawa, Japan
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Nabeta T, Ishii S, Ikeda Y, Maemura K, Oki T, Yazaki M, Fujita T, Naruke T, Inomata T, Ako J. Prognostic implications of late gadolinium enhancement for re-worsening left ventricular ejection fraction in patients with dilated cardiomyopathy: a longitudinal study of left ventricular function. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0893] [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
Background
Re-worsening left ventricular ejection fraction (LVEF) after initial recovery occurs in some patients with dilated cardiomyopathy (DCM). However, prevalence and predictors of re-worsening LVEF in longitudinal follow-up are unclear. Late gadolinium enhancement of cardiovascular magnetic resonance (LGE-CMR) can evaluate the damage of myocardial tissue.
Purpose
This study sought to evaluate the clinical parameters including LGE-CMR to predict re-worsening LVEF in patients with recent-onset DCM.
Methods
We included patients with recent-onset DCM who had an LVEF <45% and underwent LGE-CMR at diagnosis. We performed yearly echocardiographc follow-up [median 6 [4–8.3] years]. Initial LVEF recovery defined as patients increased in >5% LVEF from baseline and had an LVEF≥45% after medical therapy. Patients were divided into three groups: (1) Improved: defined as those with sustained LVEF ≥45% after initial LVEF recovery; (2) Re-worse: those with decreased >5% and had an LVEF <45% after initial LVEF recovery. and (3) Not-improved: those with no initial LVEF recovery during follow-up. To evaluate the prognostic factors for Re-worsening LVEF after initial LVEF recovery, multivariate logistic regression analysis performed between the Improved group and the Re-worse group. Cardiac events defined as hospitalization due to heart failure and sudden death.
Results
Of 138 patents, 82 patients (59%) were the Improved group, 42 patients (30%) were the Re-worse group, and 14 (10%) were the Not-improved group. Loess curves of long-term LVEF trajectories showed that LVEF in the Re-worse group increased first 2 years and declined slowly thereafter (Fig. 1A). Re-worsening LVEF occurred 4.5±2.2 years after initial LVEF recovery. Multivariate logistic regression analysis demonstrated that LGE area at baseline (Odds ratio: 1.09, 95% confidence interval (CI) 1.02–1.18, p=0.014) and Log brain natriuretic peptide (BNP) at initial LVEF recovery (Odds ratio: 1.53, 95% confidence interval (CI) 1.01–2.31, p=0.042) were independent predictors for Re-worsening LVEF. Kaplan Meier analysis demonstrated that the risk of cardiac events in the Re-worse group was significantly higher (hazard ratio: 3.93, 95% CI 1.49–10.36, p=0.006) than in the Improved group and lower risk than in the Not-improved group (hazard ratio: 0.28, 95% CI 0.12–0.62, p=0.002) (Fig. 1B).
Conclusion
Re-worsening LVEF occurred in 30% of patients in patients with recent-onset DCM. LGE area and BNP at initial LVEF recovery were independently associated with re-worsening LVEF after initial LVEF recovery.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Nabeta
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - S Ishii
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - Y Ikeda
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - K Maemura
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - T Oki
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - M Yazaki
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - T Fujita
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - T Naruke
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
| | - T Inomata
- Kitasato University School Kitasato Institute Hospital, Department of Cardiovascular Medicine, Tokyo, Japan
| | - J Ako
- Kitasato University School of Medicine, Department of Cardiovascular Medicine, Sagamihara, Japan
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Ikeda Y, Inomata T, Maemura K, Yazaki M, Oki T, Fujita T, Nabeta T, Maekawa E, Koitabashi T, Ako J. P338Combined assessment using clinical and imaging parameters to predict response to pharmacotherapy in patients with dilated cardiomyopathy. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0172] [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: 11/14/2022] Open
Abstract
Abstract
Background
Normalization of left ventricular (LV) contraction is a strong surrogate marker of favorable prognosis in patients with dilated cardiomyopathy (DCM). Although several studies have reported the individual predictive significance of clinical and imaging parameters for LV recovery in patients with DCM, there have been no reports on the scoring systems that combine these multifactorial parameters.
Methods and results
In 406 idiopathic patients with DCM, there were 185 (46%) with LV recovery at 1-year follow-up after pharmacotherapy, which was defined as improvements in LV ejection fraction of ≥+10% together with absolute values of ≥50%. Multivariate analysis demonstrated that eight baseline clinical factors and the absence of late gadolinium enhancement (negative LGE) on magnetic resonance imaging were independently associated with LV recovery. The highest odds ratio for the prediction of LV recovery was negative LGE (odds ratio: 5.62, 95% confidence interval: 2.97–10.6; p<0.0001). Response score for the prediction of LV recovery that included these nine parameters had a predictive accuracy of 0.76 for LV recovery (Figure).
Conclusion
Combined assessment using clinical and imaging parameters has a high prognostic value for predicting response to pharmacotherapy in patients with DCM.
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Affiliation(s)
- Y Ikeda
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - T Inomata
- Kitasato Institute Hospital, Cardiovascular Medicine, Tokyo, Japan
| | - K Maemura
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - M Yazaki
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - T Oki
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - T Fujita
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - T Nabeta
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - E Maekawa
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - T Koitabashi
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - J Ako
- Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
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Oki T, Otake M, Ito M, Kato A, Hatoya M. The educational intervention on the families having dementia patients. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.797] [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: 11/25/2022]
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5
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Oki T, Aokage K, Miyoshi T, Tane K, Tsuboi M. P2.16-015 Log Data of Digital Drainage System Is a Potential Predictive Factor of Pleurodesis Efficacy for Postoperative Air Leak After Pulmonary Resection. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1424] [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: 10/18/2022]
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6
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Oki T, Kano M, Ishikawa F, Goto K, Watanabe O, Suda I. Double-blind, placebo-controlled pilot trial of anthocyanin-rich purple sweet potato beverage on serum hepatic biomarker levels in healthy Caucasians with borderline hepatitis. Eur J Clin Nutr 2016; 71:290-292. [PMID: 27530473 DOI: 10.1038/ejcn.2016.153] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/02/2016] [Accepted: 06/18/2016] [Indexed: 02/04/2023]
Abstract
The objective is to evaluate the efficacy of anthocyanin-rich purple-fleshed sweet potato (PSP) beverage on the serum levels of gamma-glutamyl transferase (GGT), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) in healthy Caucasians with borderline hepatitis. Forty healthy Caucasians (41-69 years) consumed three bottles of the PSP beverage (177 mg anthocyanins per 125-ml bottle) or placebo (1.3 mg) per day for 8 weeks. Thirty-nine subjects completed the study and two subjects were excluded from statistical analysis. GGT levels in the PSP group on days 15 and 43 were lower (P=0.077 and 0.038, respectively), AST levels in the PSP group on days 29 and 43 were lower (P=0.010 and 0.045, respectively) and ALT level in the PSP group on day 43 was lower (P=0.037) than in the placebo group. The PSP beverage did not induce clinically relevant changes in other blood and clinical chemistry parameters.
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Affiliation(s)
- T Oki
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization, Koshi, Kumamoto, Japan
| | - M Kano
- Yakult Central Institute, Kunitachi, Tokyo, Japan
| | - F Ishikawa
- Yakult Central Institute, Kunitachi, Tokyo, Japan
| | - K Goto
- Agri-Food Business Innovation Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
| | - O Watanabe
- Faculty of Research and Development, Yakult Honsha Co., Ltd., Minato, Tokyo, Japan
| | - I Suda
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization, Koshi, Kumamoto, Japan
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7
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Tanabe-Tochikura A, Nakashima H, Murakami T, Tenmyo O, Oki T, Yamamoto N. Anti-Human Immunodeficiency Virus (HIV) Activity of the Novel Antiviral Antibiotic Quartromicins which Enhance Inhibitory Effect of 3′-azido-2′,3′-dideoxythymidine (AZT) in vitro. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029200300604] [Citation(s) in RCA: 13] [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: 11/17/2022]
Abstract
Novel antiviral antibiotic quartromicins A1 and D1, isolated from Amycolatopsis orientalis, significantly inhibited human immunodeficiency virus (HIV)-induced cytopathic effect and virus specific antigen expression at concentrations of 25–100 μg ml−1 In MT-4 cells infected with HTLV-IIIB. The reverse transcriptase activity of disrupted HTLV-IIIB particles, recombinant HIV-1 enzyme, and purified avian myeloblastosis virus (AMV) enzyme were also significantly inhibited by quartromicins A1 and D1. The combined antiviral effect of quartromicin A1 and AZT on the replication of HIV in MT-4 cells was also examined. Quartromicin A1 synergistically enhanced the inhibitory effect of AZT as revealed by HIV-specific antigen expression.
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Affiliation(s)
- A. Tanabe-Tochikura
- Department of Virology and Parasitology, Yamaguchi University School of Medicine, Kogushi, Ube, Yamaguchi 755, Japan
| | - H. Nakashima
- Department of Microbiology, Tokyo Medical and Dental University School of Medicine, Yushima, Bunkyo-ku, Tokyo 113, Japan
| | - T. Murakami
- Department of Microbiology, Tokyo Medical and Dental University School of Medicine, Yushima, Bunkyo-ku, Tokyo 113, Japan
- Bristol-Myers Squibb Research Institute, Shimomeguro, Meguro-ku, Tokyo 153, Japan
| | - O. Tenmyo
- Bristol-Myers Squibb Research Institute, Shimomeguro, Meguro-ku, Tokyo 153, Japan
| | - T. Oki
- Bristol-Myers Squibb Research Institute, Shimomeguro, Meguro-ku, Tokyo 153, Japan
| | - N. Yamamoto
- Department of Microbiology, Tokyo Medical and Dental University School of Medicine, Yushima, Bunkyo-ku, Tokyo 113, Japan
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8
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Yamasaki H, Otuka H, Fukuda M, Kijima Y, Matsuo T, Oki T, Douchi T. Twisted Subserosal Uterine Leiomyoma during Gonadotropin Releasing Hormone Agonist (GnRHa) Therapy. J Minim Invasive Gynecol 2012. [DOI: 10.1016/j.jmig.2012.08.404] [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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9
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Harayama Y, Oki T, Hayashi T, Tsukada K, Ota M, Asamura H. A comparative study on the techniques of SNPs analysis for degraded DNA samples. Forensic Science International: Genetics Supplement Series 2011. [DOI: 10.1016/j.fsigss.2011.08.090] [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: 10/15/2022]
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10
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Miyoshi H, Mizuguchi Y, Oishi Y, Iuchi A, Nagase N, Ara N, Oki T. Early detection of abnormal left atrial-left ventricular-arterial coupling in preclinical patients with cardiovascular risk factors: evaluation by two-dimensional speckle-tracking echocardiography. European Journal of Echocardiography 2011; 12:431-9. [DOI: 10.1093/ejechocard/jer052] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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11
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Minobe K, Ono R, Matsumine A, Shibata-Minoshima F, Izawa K, Oki T, Kitaura J, Iino T, Takita J, Iwamoto S, Hori H, Komada Y, Uchida A, Hayashi Y, Kitamura T, Nosaka T. Expression of ADAMTS4 in Ewing's sarcoma. Int J Oncol 2010; 37:569-81. [PMID: 20664926 DOI: 10.3892/ijo_00000706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Ewing's sarcoma (EWS) is a malignant bone tumor that frequently occurs in teenagers. Genetic mutations which cause EWS have been investigated, and the most frequent one proved to be a fusion gene between EWS gene of chromosome 22 and the FLI1 gene of chromosome 11. However, a limited numbers of useful biological markers for diagnosis of EWS are available. In this study, we identified ADAMTS4 (a disintegrin and metalloproteinase with thrombospondin motifs) as a possible tumor marker for EWS using the retrovirus-mediated signal sequence trap method. ADAMTS4 is a secreted protein of 837 amino acids with a predicted molecular mass of 98-100 kDa. It is a member of metalloprotease family, is expressed mainly in cartilage and brain, and regulates the degradation of aggrecans. ADAMTS4 has been suggested to be involved in arthritic diseases and gliomas. Herein, we show that ADAMTS4 mRNA was expressed in all primary EWS samples and all EWS-derived cell lines examined, while its expression was detected only in small subpopulations of other solid tumors. Furthermore, ADAMTS4 expression was found to be regulated by EWS-FLI1 fusion gene-dependent manner. We also demonstrated that ADAMTS4 protein was highly expressed in tumor samples of the patients with EWS by using immunohistochemistry. These results suggest that ADAMTS4 is a novel tumor marker for EWS.
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Affiliation(s)
- K Minobe
- Department of Microbiology and Molecular Genetics, Mie University Graduate School of Medicine, Tsu, Japan
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12
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Oki T, Fukuoka K, Hosoda K, Koumura E, Kinoshita S, Kawano S. P10-21 Case report: N20 amplitude of SEP lost during late clamping phase of carotid endarterectomy. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60674-8] [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: 11/26/2022]
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13
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14
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Mizuguchi Y, Oishi Y, Miyoshi H, Iuchi A, Nagase N, Ara N, Oki T. Possible mechanisms of left ventricular torsion evaluated by cardioreparative effects of telmisartan in patients with hypertension. European Journal of Echocardiography 2010; 11:690-7. [DOI: 10.1093/ejechocard/jeq044] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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15
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Komeno Y, Kitaura J, Watanabe-Okochi N, Kato N, Oki T, Nakahara F, Harada Y, Harada H, Shinkura R, Nagaoka H, Hayashi Y, Honjo T, Kitamura T. AID-induced T-lymphoma or B-leukemia/lymphoma in a mouse BMT model. Leukemia 2010; 24:1018-24. [PMID: 20357822 DOI: 10.1038/leu.2010.40] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Activation-induced cytidine deaminase (AID) diversifies immunoglobulin through somatic hypermutation (SHM) and class-switch recombination (CSR). AID-transgenic mice develop T-lymphoma, indicating that constitutive expression of AID leads to tumorigenesis. Here, we transplanted mouse bone marrow cells transduced with AID. Twenty-four of the 32 recipient mice developed T-lymphoma 2-4 months after the transplantation. Surprisingly, unlike AID-transgenic mice, seven recipients developed B-leukemia/lymphoma with longer latencies. None of the mice suffered from myeloid leukemia. When we used nude mice as recipients, they developed only B-leukemia/lymphoma, presumably due to lack of thymus. Analysis of AID mutants suggested that an intact form with SHM activity is required for maximum ability of AID to induce lymphoma. Except for a K-ras active mutant in one case, specific mutations could not be identified in T-lymphoma; however, Notch1 was constitutively activated in most cases. Importantly, truncations of Ebf1 or Pax5 were observed in B-leukemia/lymphoma. In conclusion, this is the first report on the potential of AID overexpression to promote B-cell lymphomagenesis in a mouse model. Aberrant expression of AID in bone marrow cells induced leukemia/lymphoma in a cell-lineage-dependent manner, mainly through its function as a mutator.
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Affiliation(s)
- Y Komeno
- Division of Cellular Therapy, Advanced Clinical Research Center, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
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Nozawa M, Oki T, Okuda Y, Minami T, Hayashi T, Nagae S, Nishigaki K, Mochida Y, Uemura H. 7125 Tolerability and adverse events of sunitinib in Japanese patients with advanced renal cell carcinoma. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71458-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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17
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Balzarini J, François K, Van Laethem K, Hoorelbeke B, Auwerx J, Liekens S, Igarashi Y, Oki T, Schols D. Pradimicin-S is a Highly Soluble Non-peptidic Small-size Carbohydrate-binding Antibiotic that may Qualify as a Potential Drug Lead for HIV Treatment. Antiviral Res 2009. [DOI: 10.1016/j.antiviral.2009.02.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Oki T, Tabata T, Yamada H, Fukuda K, Abe M, Onose Y, Wakatsuki T, Iuchi A, Ito S. Assessment of abnormal left atrial relaxation by transesophageal pulsed Doppler echocardiography of pulmonary venous flow velocity. Clin Cardiol 2009; 21:753-8. [PMID: 9789697 PMCID: PMC6655853 DOI: 10.1002/clc.4960211011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Several studies on left ventricular relaxation have been undertaken in the past; however, left atrial (LA) relaxation has not been fully evaluated. HYPOTHESIS The purpose of this study was to assess abnormalities in LA relaxation by evaluating pulmonary venous flow velocity and interatrial septal motion using transesophageal echocardiography. METHODS The subjects were 56 untreated patients in sinus rhythm, including 25 with previous myocardial infarction, 9 with hypertrophic cardiomyopathy, 11 with dilated cardiomyopathy, as well as 11 with chest pain syndrome as controls. Peak first systolic velocity (PVS1), peak atrial systolic velocity (PVA), and their time-velocity integrals (PVS1-I and PVA-I, respectively) were calculated from the pulmonary venous flow velocity. RESULTS The PVS1 and PVS1-I correlated negatively with the maximum LA dimension and mean pulmonary capillary wedge pressure, and correlated positively with the amplitude of the interatrial septal motion during LA relaxation and percent fractional LA relaxation. The PVA and PVA-I did not correlate with the mean pulmonary capillary wedge pressure. There was a weak positive correlation between PVA and PVS1, and a close positive correlation between the ratio of PVA to PVS1 and mean pulmonary capillary wedge pressure. Multiple regression analysis indicated that the PVS1 was most closely related to percent fractional LA relaxation, followed by mean pulmonary capillary wedge pressure. CONCLUSION The PVS1 determined from the pulmonary venous flow velocity is closely related to parameters of LA relaxation which may be determined by transesophageal M-mode echocardiography, and the ratio of PVA to PVS1 is useful for noninvasive evaluation of LA pressure.
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Affiliation(s)
- T Oki
- Second Department of Internal Medicine, School of Medicine, University of Tokushima, Japan
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Oki T, Tabata T, Yamada H, Wakatsuki T, Fukuda K, Abe M, Onose Y, Iuchi A, Fukuda N, Ito S. Evaluation of left atrial filling using systolic pulmonary venous flow velocity measurements in patients with atrial fibrillation. Clin Cardiol 2009; 21:169-74. [PMID: 9541760 PMCID: PMC6655777 DOI: 10.1002/clc.4960210306] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND The pattern of pulmonary venous flow velocity is useful for understanding the hemodynamic relationship between the left atrium and left ventricle in patients with a variety of diseases, and the systolic flow wave, in particular, is considered a clinically important parameter that reflects left atrial filling. HYPOTHESIS The study was undertaken to determine whether systolic pulmonary venous flow velocity patterns can be used to evaluate left atrial filling in patients with atrial fibrillation. METHODS We performed transesophageal pulsed Doppler echocardiography and cardiac catheterization in 34 patients with chronic atrial fibrillation (10 with hypertrophic cardiomyopathy, 5 with dilated cardiomyopathy, 7 with previous myocardial infarction, and 12 with isolated atrial fibrillation) and 15 normal controls in sinus rhythm. RESULTS Mean pulmonary capillary wedge pressure, V-wave height in the pulmonary capillary wedge pressure curve, and left ventricular end-diastolic pressure were significantly higher in the hypertrophic cardiomyopathy and dilated failing heart (previous myocardial infarction and dilated cardiomyopathy) groups than in the isolated atrial fibrillation and normal groups. The peak velocity and time-velocity integral of the systolic pulmonary venous flow velocity, and percent left atrial emptying fraction were significantly lower in the dilated failing heart group than in the isolated atrial fibrillation, hypertrophic cardiomyopathy, and normal groups. The peak velocity and time-velocity integral of the systolic pulmonary venous flow velocity, percent left atrial emptying fraction, and V-wave height were comparatively constant when the preceding R-R intervals were relatively stable in the isolated atrial fibrillation group and in 4 of the 10 patients with hypertrophic cardiomyopathy. However, changes in these variables correlated with the preceding R-R interval in all patients with dilated failing hearts and in 6 of the 10 patients with hypertrophic cardiomyopathy. CONCLUSION Transesophageal pulsed Doppler echocardiographic measurements of systolic pulmonary venous flow velocity are valid indicators of left atrial filling in patients with atrial fibrillation.
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Affiliation(s)
- T Oki
- Second Department of Internal Medicine, School of Medicine, University of Tokushima, Japan
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Mishiro Y, Oki T, Iuchi A, Tabata T, Yamada H, Manabe K, Fukuda K, Abe M, Onose Y, Ishimoto T, Ito S. Echocardiographic characteristics and causal mechanism of physiologic mitral regurgitation in young normal subjects. Clin Cardiol 2009; 20:850-5. [PMID: 9377821 PMCID: PMC6655874 DOI: 10.1002/clc.4960201011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND It has become evident that mitral regurgitation (MR) is not uncommon in healthy subjects, and Doppler color flow mapping is a technique that imparts important information relevant to its detection. HYPOTHESIS Using transthoracic echocardiography, this study evaluated the mechanism of physiologic MR in young normal subjects using transthoracic echocardiography. METHODS The study population consisted of 48 young normal subjects (mean 21 +/- 5 years) with MR (physiologic MR group), 40 age-matched young normal subjects (mean 20 +/- 5 years) without MR (control group), 45 patients (mean 41 +/- 15 years) with mitral valve prolapse with MR (MVP group), and 27 patients (mean 59 +/- 13 years) with ruptured chordae tendineae (rupture group). RESULTS Men were predominant in the rupture group, whereas there were no significant gender differences in the other three groups. Left ventricular end-diastolic dimension and left atrial systolic dimension were slightly smaller in the physiologic MR group than in the control group, but were significantly smaller than those in the MVP and rupture groups. The ratio of the maximum anteroposterior diameter to the maximum transverse diameter on chest radiography and the ratio of the short- to long-axis diameter of the left ventricular cavity at end diastole, determined from two-dimensional short-axis echocardiogram, were significantly lower in the physiologic MR group than in the other three groups. Mitral regurgitation occurred more frequently at the posteromedial commissural site in the physiologic MR and MVP groups, whereas there was no preference for location in the rupture group. Early systolic MR was often observed in the physiologic MR group, whereas pansystolic MR was common in the MVP and rupture groups. CONCLUSION As a causal mechanism for physiologic MR detected in young normal subjects, "flattening" of the thorax during growth may cause morphologic abnormalities of the left atrial and ventricular cavities, resulting in spatial imbalance of the mitral complex and resulting in malcoaptation of the valve.
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Affiliation(s)
- Y Mishiro
- Department of Internal Medicine, National Sanatorium Higashitokushima Hospital, Tokushima, Japan
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Oki T, Iuchi A, Tabata T, Yamada H, Manabe K, Kageji Y, Abe M, Fukuda N, Ito S. Transesophageal pulsed Doppler echocardiographic evaluation of left atrial systolic performance in hypertrophic cardiomyopathy: combined analysis of transmitral and pulmonary venous flow velocities. Clin Cardiol 2009; 20:47-54. [PMID: 8994738 PMCID: PMC6656212 DOI: 10.1002/clc.4960200111] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Hypertrophic cardiomyopathy (HC) is characterized by impaired left ventricular (LV) diastolic function due to an increase in LV wall thickness. The severity of this disease varies depending on the localization and extent of the hypertrophied myocardium and the presence and extent of myocardial disarray or fibrosis. HYPOTHESIS The purpose of this study was to examine the background of hemodynamic abnormalities between the left atrium and the left ventricle during atrial systole in patients with HC using pulsed Doppler echocardiography. METHODS Hemodynamic abnormalities between the left atrium and left ventricle during atrial systole were evaluated in patients with HC using transmitral flow (TMF) and pulmonary venous flow (PVF) velocities obtained by transesophageal pulsed Doppler echocardiography. The study population included 50 patients with HC, including 39 with asymmetric septal hypertrophy and 11 with apical hypertrophy, and showing fractional shortening of the left ventricle > or = 30%. They were classified into three groups: (1) Group A (n = 11): the ratio of the late to early TMF velocity < 1, and peak atrial systolic PVF velocity (PVA) < 25 mm/s; (2) Group B (n = 13): their ratio < 1, and PVA > or = 25 mm/s; and (3) Group C (n = 26): their ratio > or = 1. The mean age of patients in Group A was lower than that in Groups B and C. RESULTS Left atrial dimension in Group B was significantly greater than that in the other HC groups and the control group. Furthermore, left atrial volume changes during atrial systole in Group B were significantly smaller than those in the other HC groups and the control group. Peak atrial systolic PVF velocity in Group B was significantly higher than that in the control group and in Group C. The duration of the atrial systolic waves of the TMF and PVF in Group B was significantly shorter and longer, respectively, than that in Group A. Left ventricular end-diastolic pressure (LVEDP) decreased in descending order with Group B > Group C > Group A. In all patients there was a significant positive correlation between the LVEDP and peak atrial systolic PVF velocity or the difference in duration between the atrial systolic waves of PVF and TMF. Plots of these values shifted toward the left and inferiorly in Group A, and toward the right and superiorly in Group B. CONCLUSION Peak velocity and duration of TMF and PVF during atrial systole by transesophageal pulsed Doppler echocardiography are useful indices of hemodynamic abnormalities between the left atrium and the left ventricle during atrial systole, particularly a forceful atrial contraction mismatched to the left atrial afterload and severity of LV diastolic dysfunction, in HC.
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Affiliation(s)
- T Oki
- Second Department of Internal Medicine, Tokushima University School of Medicine, Japan
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Yamasaki H, Kawamura Y, Tokunaga M, Matsuo T, Oki T. 382: Successful Laparoscopic Myomectomy of Vascular Leiomyoma With Neuroendocrine Differentiation. J Minim Invasive Gynecol 2007. [DOI: 10.1016/j.jmig.2007.08.633] [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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Asamura H, Fujimori S, Ota M, Oki T, Fukushima H. Evaluation of miniY-STR multiplex PCR systems for extended 16 Y-STR loci. Int J Legal Med 2007; 122:43-9. [PMID: 17899155 DOI: 10.1007/s00414-007-0193-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2007] [Accepted: 08/14/2007] [Indexed: 11/30/2022]
Abstract
We developed three short amplicon Y-chromosomal short tandem repeat (miniY-STR) polymerase chain reaction multiplex systems for 16 Y-STR loci (DYS441, DYS446, DYS462, DYS481, DYS485, DYS495, DYS505, DYS510, DYS511, DYS549, DYS 575, DYS578, DYS593, DYS618, DYS638, and DYS643), using newly designed primer sets. In an assay of 238 Japanese males using the three miniY-STR systems, amplification product lengths ranged from 91 to 151 bp for all 16 Y-STR loci. We identified 212 different haplotypes among the 238 individuals, finding haplotype diversity and discrimination capacity of 0.9974 and 0.8908, respectively. An assay of degraded DNA samples using the three miniY-STR multiplex systems, including artificially degraded samples and degraded forensic casework samples, proved remarkably effective. In conclusion, analyses of miniY-STR multiplex systems will play an important role in forensic applications involving degraded DNA samples for which genotyping using only commercial kits is ill-suited.
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Affiliation(s)
- H Asamura
- Department of Legal Medicine, Shinshu University School of Medicine, Asahi 3-1-1, Matsumoto, Nagano, 390-8621, Japan.
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Lu Y, Kitaura J, Oki T, Komeno Y, Ozaki K, Kiyono M, Kumagai H, Nakajima H, Nosaka T, Aburatani H, Kitamura T. Identification of TSC-22 as a potential tumor suppressor that is upregulated by Flt3-D835V but not Flt3-ITD. Leukemia 2007; 21:2246-57. [PMID: 17690703 DOI: 10.1038/sj.leu.2404883] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Transforming growth factor-beta (TGF-beta)-stimulated clone-22 (TSC-22) was originally isolated as a TGF-beta-inducible gene. In this study, we identified TSC-22 as a potential leukemia suppressor. Two types of FMS-like tyrosine kinase-3 (Flt3) mutations are frequently found in acute myeloid leukemia: Flt3-ITD harboring an internal tandem duplication in the juxtamembrane domain associated with poor prognosis and Flt3-TKD harboring a point mutation in the kinase domain. Comparison of gene expression profiles between Flt3-ITD- and Flt3-TKD-transduced Ba/F3 cells revealed that constitutive activation of Flt3 by Flt3-TKD, but not Flt3-ITD, upregulated the expression of TSC-22. Importantly, treatment with an Flt3 inhibitor PKC412 or an Flt3 small interfering RNA decreased the expression level of TSC-22 in Flt3-TKD-transduced cells. Forced expression of TSC-22 suppressed the growth and accelerated the differentiation of several leukemia cell lines into monocytes, in particular, in combination with differentiation-inducing reagents. On the other hand, a dominant-negative form of TSC-22 accelerated the growth of Flt3-TKD-transduced 32Dcl.3 cells. Collectively, these results suggest that TSC-22 is a possible target of leukemia therapy.
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Affiliation(s)
- Y Lu
- Division of Cellular Therapy, Advanced Clinical Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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Kanesaka T, Mori M, Hattori T, Oki T, Kuwabara S. Serum matrix metalloproteinase-3 levels correlate with disease activity in relapsing-remitting multiple sclerosis. J Neurol Neurosurg Psychiatry 2006; 77:185-8. [PMID: 16421119 PMCID: PMC2077579 DOI: 10.1136/jnnp.2005.068619] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Adhesion molecules and matrix metalloproteinases (MMPs) are known to be relevant to the ongoing development and disappearance of areas of demyelination in the white matter of the CNS of multiple sclerosis (MS) patients. This study examined whether serum matrix metalloproteinase-3 (MMP-3) levels correlate with disease activity in MS. METHODS Serum MMP-3 levels in 47 consecutive patients with relapsing-remitting MS were measured by immunoassay every 4 weeks over a 15 month period. RESULTS During the study period, 48 clinical relapses occurred. Serum MMP-3 levels within 1 month of relapse were significantly higher than during the remission phase. Sequential analysis showed that serum MMP-3 levels had increased transiently at the time of clinical relapse but returned to the normal range within a month. CONCLUSIONS Circulatory MMP-3 levels are correlated with disease activity in relapsing-remitting MS. This may contribute to the breakdown of the blood-brain barrier at the time of relapse.
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Affiliation(s)
- T Kanesaka
- Department of Neurology, Chiba University School of Medicine, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8670 Japan.
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Sakatani M, Suda I, Oki T, Kobayashi SI, Kobayashi S, Takahashi M. 177 ANTHOCYANIN ISOLATED FROM PURPLE SWEET POTATO IMPROVES DEVELOPMENT AND REDUCES OXIDATIVE STRESS OF BOVINE PRE-IMPLANTATION EMBRYOS EXPOSED TO HEAT SHOCK. Reprod Fertil Dev 2006. [DOI: 10.1071/rdv18n2ab177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Development of cleavage-stage pre-implantation embryos is disrupted by exposure to heat shock. Heat shock also increases intracellular reactive oxygen species (ROS) in pre-implantation embryos. Therefore, reduction of intracellular ROS levels might improve the development of heat-shocked embryos. Recently the antioxidative activities of polyphenols have been widely reported to reduce the oxidative stress. In this study, we investigated the effect of purple sweet potato anthocyanin, a kind of polyphenol that is a strong ROS scavenger, on development and intracellular redox status of bovine pre-implantation embryos exposed to heat shock. Experiment 1: In vitro-produced 8-16-cell-stage embryos on Day 2 after fertilization were exposed to 41.5�C for 6 h in CR1aa containing 0, 0.1, 1, and 10 �g/mL anthocyanin at 5% CO2, 5% O2, and 90% N2. After heat shock, embryos were cultured at 38.5�C at 5% CO2, 5% O2 until Day 8. On Day 8, the proportion of embryos developing to the blastocyst stage was evaluated. Blastocyst total cell number and the ratio between inner cell mass and tropheoderm were evaluated by differential staining. The experiment was replicated five times with more than 70 embryos used in each treatment. Experiment 2: Heat shock treatment of in vitro-produced 8-16-cell-stage embryos was carried out as described in experiment 1. After heat shock, intracellular ROS and glutathione (GSH) levels were measured in individual 8-16 cell stage embryos with fluorescent probes (22,72-dichlorodihydrofluorescein diacetate for ROS and CellTracker" Blue (Invitrogen Japan K. K., Tokyo, Japan) for GSH). The fluorescence emissions of each treatment were normalized to those of 8-16 cell stage embryos cultured at 38.5�C without anthocyanin to obtain the relative fluorescence emission. This experiment was replicated four times. Embryos treated with heat stress without anthocyanin (0 �g/mL) showed low development (14.6 � 3.6%) and blastocyst total cell number (88.2 � 9.4). However, embryos treated with 0.1 �g/mL anthocyanin improved development (31.7 � 4.5%, P < 0.05) and increased the total cell number (96.5 � 11.3). The higher concentrations of anthocyanin (1 and 10 �g/mL) did not affect development and cell number. The intracellular ROS levels in heat-shocked embryos were significantly reduced by all concentrations of anthocyanin (P < 0.05). In addition, anthocyanin increased GSH levels at all doses tested (P < 0.05). These results indicate that an appropriate concentration of anthocyanin improves development by regulating intracellular redox balance in bovine embryos exposed to heat shock.
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Oki T, Kanae S. Virtual water trade and world water resources. Water Sci Technol 2004; 49:203-209. [PMID: 15195440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Global virtual water trade was quantitatively estimated and evaluated. The basic idea of how to estimate unit requirement of water resources to produce each commodity is introduced and values for major agricultural and stock products are presented. The concept of virtual water and the quantitative estimates can help in assessing a more realistic water scarcity index in each country, projecting future water demand for food supply, increasing public awareness on water, and identifying the processes wasting water in the production. Really required water in exporting countries is generally smaller than virtually required water in importing countries, reflecting the comparative advantage of water use efficiency, and it is estimated to be 680 km3/y for 2000. On the contrary the virtually required water for the same year is estimated to be 1,130 km3/y, and the difference of 450 km3/y is virtually saved by global trade. However, solely virtual water should not be used for any decision making since the idea of virtual water implies only the usage and influence of water and no concerns on social, cultural, and environmental implications. Virtual water trade also does not consider other limiting factors than water.
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Affiliation(s)
- T Oki
- Research Institute for Humanity and Nature, Takashima-cho, Kamigyo-ku, Kyoto 602-0878, Japan.
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Oki T, Masuda M, Furuta S, Nishiba Y, Terahara N, Suda I. Involvement of Anthocyanins and other Phenolic Compounds in Radical-Scavenging Activity of Purple-Fleshed Sweet Potato Cultivars. J Food Sci 2002. [DOI: 10.1111/j.1365-2621.2002.tb08718.x] [Citation(s) in RCA: 182] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tateishi A, Mitsui H, Oki T, Morishita J, Maekawa H, Yahagi N, Maruyama T, Ichinose M, Ohnishi S, Shiratori Y, Minami M, Koutetsu S, Hori N, Watanabe T, Nagawa H, Omata M. Extensive mesenteric vein and portal vein thrombosis successfully treated by thrombolysis and anticoagulation. J Gastroenterol Hepatol 2001; 16:1429-33. [PMID: 11851847 DOI: 10.1046/j.1440-1746.2001.02557.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Mesenteric vein thrombosis is generally difficult to diagnose and can be fatal. A case of extensive thrombosis of the mesenteric and portal veins was diagnosed early and successfully treated in a 26-year-old man with Down syndrome who was admitted to hospital because of abdominal pain, severe nausea and high fever. Ultrasonography revealed moderate ascites, and there was minimal flow in the portal vein (PV) on the Doppler examination. Computed tomography (CT) showed remarkable thickening of the walls of the small intestine and extensive thrombosis of the mesenteric, portal and splenic veins. Because neither intestinal infarction nor peritonitis was seen, combined thrombolysis and anticoagulation therapy without surgical treatment was chosen. Urokinase was administered intravenously and later through a catheter in the superior mesenteric artery. Heparin and antibiotics were given concomitantly. The patient's symptoms and clinical data improved gradually. After 10 days, CT revealed that collateral veins had developed and the thrombi in the distal portions of the mesenteric veins had dissolved, although the main trunk of the PV had not recanalized. The only risk factor of thrombosis that was detected was decreased protein S activity.
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Affiliation(s)
- A Tateishi
- Departments of Gastroenterology, Radiology and Surgical Oncology, University of Tokyo, Tokyo, Japan.
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Hiura N, Wakatsuki T, Yamamoto T, Nishikado A, Oki T, Ito S. Effects of angiotensin II type 1 receptor antagonist (candesartan) in preventing fatal ventricular arrhythmias in dogs during acute myocardial ischemia and reperfusion. J Cardiovasc Pharmacol 2001; 38:729-36. [PMID: 11602819 DOI: 10.1097/00005344-200111000-00009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Fatal arrhythmias may be prevented by long-term oral administration of angiotensin-converting enzyme (ACE) inhibitors or angiotensin II type 1 (AT 1 ) receptor antagonists. However, there have been no studies evaluating the electrophysiologic changes that occur with the acute administration of AT 1 receptor antagonists during acute myocardial ischemia and reperfusion. This study aimed to evaluate the ability of candesartan to prevent fatal arrhythmias during acute myocardial ischemia and reperfusion. The left anterior descending (LAD) coronary artery was ligated for 10 min and then reperfused for 10 min in 45 adult mongrel dogs. Candesartan (1 mg/kg) or saline was administered intravenously 10 min before ligation of the LAD coronary artery (candesartan group [n = 20] and control group [n = 25], respectively). Changes in ventricular effective refractory period (ERP) and intramyocardial conduction time (ICT) in the risk area were compared during LAD occlusion and reperfusion. Ischemia-induced shortening of ERP was inhibited in the candesartan group compared with the control. There was a 4.7 +/- 5.8% increase in ERP in the candesartan group, compared with a 11.5 +/- 6.3% shortening in the control group (p < 0.01). Prolongation of ICT was inhibited in the candesartan group compared with the control group during both ischemia and reperfusion (maximal prolongation of ICT: 0.1 +/- 3.0% vs. 37.7 +/- 9.6%, respectively; p < 0.01). Incidence of ventricular fibrillation was lower in the candesartan group than in the control group (25% [5/20] vs. 72% [18/25], respectively; p < 0.01). Candesartan suppresses changes in ERP and ICT during acute myocardial ischemia and reperfusion, suggesting that candesartan can prevent the development of fatal arrhythmias.
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Affiliation(s)
- N Hiura
- The Second Department of Internal Medicine, University of Tokushima School of Medicine, Tokushima, Japan.
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Shinozuka Y, Okada M, Oki T, Sagane K, Mizui Y, Tanaka I, Katayama K, Murakami-Murofushi K. Altered expression of HES-1, BETA2/NeuroD, and PDX-1 is involved in impaired insulin synthesis induced by glucocorticoids in HIT-T15 cells. Biochem Biophys Res Commun 2001; 287:229-35. [PMID: 11549279 DOI: 10.1006/bbrc.2001.5573] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Expression of the insulin gene is highly specific to pancreatic beta cells and is upregulated mainly by PDX-1 and BETA2/NeuroD depending on the extracellular glucose concentration. However, its downregulation has not been well studied. Reporter gene analyses using pancreatic HIT-T15 cells revealed that the glucose-dependent insulin promoter activity was blocked by glucocorticoids, dexamethasone (DEX) and hydrocortisone, in a dose-dependent manner. After the addition of DEX (20 nM) to HIT-T15 cells, a decrease of insulin mRNA was observed at 12-24 h, followed by a decline of insulin protein at 48 h. Expressions of PDX-1 and BETA2/NeuroD decreased within 2 h. HES-1, a potent negative regulator of bHLH-type transcription factors, was found to be expressed in HIT-T15 cells, and its expression was increased 6 h after the addition of DEX. Overexpression of HES-1 suppressed the insulin promoter activity in a dose-dependent manner. These results suggest that glucocorticoids impair insulin synthesis in HIT-T15 cells by decreasing PDX-1 and BETA2/NeuroD and that enhancement of HES-1 expression is involved in this regulation.
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Affiliation(s)
- Y Shinozuka
- Department of Biology, Faculty of Science, Ochanomizu University, 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
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Douchi T, Oki T, Yamasaki H, Kuwahata R, Nakae M, Nagata Y. Relationship of androgens to muscle size and bone mineral density in women with polycystic ovary syndrome. Obstet Gynecol 2001; 98:445-9. [PMID: 11530127 DOI: 10.1016/s0029-7844(01)01450-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To investigate the relationship of androgens to regional muscle size and bone mineral density (BMD) in women with polycystic ovary syndrome (PCOS). METHODS Seventy-one amenorrheic and right-side dominant women with PCOS (mean age +/- standard deviation 28.1 +/- 6.7 years) were enrolled. Baseline characteristics included age, height, weight, and body mass index (BMI). Regional BMD and lean mass were measured by whole-body scanning with dual-energy x-ray absorptiometry. Serum levels of testosterone, dehydroepiandrosterone sulfate (DHEAS), and androstenedione were measured by radioimmunoassay. Correlations between regional BMD and variables were investigated using a Pearson correlation test and multiple regression analysis. RESULTS Serum testosterone levels correlated significantly with lean mass of the left arm, right arm, trunk, left leg, and right leg (r =.34, P <.05 to r =.50, P <.01). Regional lean mass correlated significantly with respective regional BMD (r =.30, P <.05 to r =.68, P <.001). These relationships remained significant after adjusting for age, height, and weight. Serum testosterone levels were not correlated with BMD of the bilateral arms and lumbar spine. Although serum testosterone levels correlated with leg BMD (r =.34, P <.05 to r =.45, P <.01), significance did not persist after adjusting for respective regional lean mass. CONCLUSION Testosterone influences regional BMD through increasing regional muscle mass in women with polycystic ovary syndrome.
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Affiliation(s)
- T Douchi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
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Fujii N, Oki T, Sakurai A, Suye S, Sakakibara M. Ethanol production from starch by immobilized Aspergillus awamori and Saccharomyces pastorianus using cellulose carriers. J Ind Microbiol Biotechnol 2001; 27:52-7. [PMID: 11598811 DOI: 10.1038/sj.jim.7000162] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2000] [Accepted: 06/02/2001] [Indexed: 11/09/2022]
Abstract
A simultaneous saccharification and fermentation (SSF) process was investigated to produce ethanol using two kinds of cellulose carriers that were respectively suitable for immobilization of Aspergillus awamori and Saccharomyces pastorianus. The maximum ethanol concentration attained by the batch operation was 25.5 g l(-1). Under suitable conditions, both cellulose carriers with immobilized cells could be reused efficiently for three cycles. The total amount of ethanol production was 66.0 g (per 1 l working volume) after the repeated operation. Ethanol productivity mainly depends on a saccharification process. There is a limit in durability in the repeated batch operation, and it is important to maintain high activity of the fungus in order to produce ethanol efficiently.
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Affiliation(s)
- N Fujii
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Fukui University, Fukui 910-8507, Japan
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Oki T, Yamada S, Tohma A, Kimura R. Muscarinic receptor binding characteristics in rat tissues after oral administration of oxybutynin and propiverine. Biol Pharm Bull 2001; 24:491-5. [PMID: 11379767 DOI: 10.1248/bpb.24.491] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ex vivo muscarinic receptor binding of oxybutynin and propiverine, the most commonly used anticholinergic agents for the treatment in patients with urinary incontinence, was investigated in rat tissues. The oral administration of oxybutynin (50.8 and 127 micromol/kg) caused a significant increase in the apparent dissociation constant (Kd) for specific (-)-[3H]QNB binding in the rat bladder, prostate, submaxillary gland, heart and cerebral cortex, compared with each of the control values. Also, in the submaxillary gland of these rats, there was a reduction in the maximal number of binding sites (Bmax) for (-)-[3H]QNB binding. Similarly, oral administration of propiverine at doses of 74.3-297 micromol/kg brought about a significant increase in the Kd values for (-)-[3H]QNB binding in rat tissues including the bladder, and greater increase in Kd values was seen in the rat prostate, heart and submaxillary gland. On the other hand, oral administration of propiverine, unlike oxybutynin, resulted in very little reduction in the Bmax valules for (-)-[3H]QNB binding in the submaxillary gland. In conclusion, the present study has shown that oxybutynin and propiverine, after oral administration, bind significantly to muscarinic receptors in tissues such as the bladder, which is the target organ for the treatment of urinary incontinence, and that oxybutynin appears to exhibit long-term binding to muscarinic receptors in the salivary gland.
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Affiliation(s)
- T Oki
- Department of Biopharmacy, School of Pharmaceutical Sciences, University of Shizuoka, Yada, Japan
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Ino M, Yoshinaga T, Wakamori M, Miyamoto N, Takahashi E, Sonoda J, Kagaya T, Oki T, Nagasu T, Nishizawa Y, Tanaka I, Imoto K, Aizawa S, Koch S, Schwartz A, Niidome T, Sawada K, Mori Y. Functional disorders of the sympathetic nervous system in mice lacking the alpha 1B subunit (Cav 2.2) of N-type calcium channels. Proc Natl Acad Sci U S A 2001; 98:5323-8. [PMID: 11296258 PMCID: PMC33208 DOI: 10.1073/pnas.081089398] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
N-type voltage-dependent Ca(2+) channels (VDCCs), predominantly localized in the nervous system, have been considered to play an essential role in a variety of neuronal functions, including neurotransmitter release at sympathetic nerve terminals. As a direct approach to elucidating the physiological significance of N-type VDCCs, we have generated mice genetically deficient in the alpha(1B) subunit (Ca(v) 2.2). The alpha(1B)-deficient null mice, surprisingly, have a normal life span and are free from apparent behavioral defects. A complete and selective elimination of N-type currents, sensitive to omega-conotoxin GVIA, was observed without significant changes in the activity of other VDCC types in neuronal preparations of mutant mice. The baroreflex response, mediated by the sympathetic nervous system, was markedly reduced after bilateral carotid occlusion. In isolated left atria prepared from N-type-deficient mice, the positive inotropic responses to electrical sympathetic neuronal stimulation were dramatically decreased compared with those of normal mice. In contrast, parasympathetic nervous activity in the mutant mice was nearly identical to that of wild-type mice. Interestingly, the mutant mice showed sustained elevation of heart rate and blood pressure. These results provide direct evidence that N-type VDCCs are indispensable for the function of the sympathetic nervous system in circulatory regulation and indicate that N-type VDCC-deficient mice will be a useful model for studying disorders attributable to sympathetic nerve dysfunction.
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Affiliation(s)
- M Ino
- Tsukuba Research Laboratories, Eisai Co., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
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Matsui T, Ueda T, Oki T, Sugita K, Terahara N, Matsumoto K. alpha-Glucosidase inhibitory action of natural acylated anthocyanins. 1. Survey of natural pigments with potent inhibitory activity. J Agric Food Chem 2001; 49:1948-51. [PMID: 11308351 DOI: 10.1021/jf001251u] [Citation(s) in RCA: 252] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
alpha-Glucosidase (AGH) inhibitory study by natural anthocyanin extracts was done. As the result of a free AGH assay system, 12 anthocyanin extracts were found to have a potent AGH inhibitory activity; in particular, Pharbitis nil (SOA) extract showed the strongest maltase inhibitory activity, with an IC(50) value of 0.35 mg/mL, as great as that of Ipomoea batatas (YGM) extract (IC(50) = 0.36 mg/mL). Interestingly, neither extract inhibited the sucrase activity at all. For the immobilized assay system, which may reflect the pharmacokinetics of AGH at the small intestine, SOA and YGM extracts gave more potent maltase inhibitory activities than those of the free AGH assay, with IC(50) values of 0.17 and 0.26 mg/mL, respectively. Both extracts also inhibited alpha-amylase action, indicating that anthocyanins would have a potential function to suppress the increase in postprandial glucose level from starch.
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Affiliation(s)
- T Matsui
- Department of Bioscience and Biotechnology, Division of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
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Matsui T, Ueda T, Oki T, Sugita K, Terahara N, Matsumoto K. alpha-Glucosidase inhibitory action of natural acylated anthocyanins. 2. alpha-Glucosidase inhibition by isolated acylated anthocyanins. J Agric Food Chem 2001; 49:1952-6. [PMID: 11308352 DOI: 10.1021/jf0012502] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Four diacylated pelargonidin (Pg: SOA-4 and SOA-6), cyanidin (Cy: YGM-3), and peonidin (Pn: YGM-6) 3-sophoroside-5-glucosides isolated from the red flowers of the morning glory, Pharbitis nil cv. Scarlett O'Hara (SOA), and the storage roots of purple sweet potato, Ipomoea batatas cv. Ayamurasaki (YGM), were subjected to an alpha-glucosidase (AGH) inhibitory assay, in which the assay was performed with the immobilized AGH (iAGH) system to mimic the membrane-bound AGH at the small intestine. As a result, the acylated anthocyanins showed strong maltase inhibitory activities with IC(50) values of <200 microM, whereas no sucrase inhibition was observed. Of these, SOA-4 [Pg 3-O-(2-O-(6-O-(E-3-O-(beta-D-glucopyranosyl)caffeyl)-beta-D-glucopyranosyl)-6-O-E-caffeyl-beta-D-glucopyranoside)-5-O-beta-D-glucopyranoside] possessed the most potent maltase inhibitory activity (IC(50) = 60 microM). As a result of a marked reduction of iAGH inhibitory activity by deacylating the anthocyanins, that is, Pg (or Cy or Pn) sophoroside-5-glucoside, acylation of anthocyanin with caffeic (Caf) or ferulic (Fer) acid was found to be important in the expression of iAGH (maltase) inhibition. In addition, the result that Pg-based anthocyanins showed the most potent maltase inhibition, with an IC(50) value of 4.6 mM, and the effect being in the descending order of potency of Pg > Pn/Cy strongly suggested that no replacement at the 3'(5')-position of the aglycon B-ring may be essential for inhibiting iAGH action.
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Affiliation(s)
- T Matsui
- Department of Bioscience and Biotechnology, Division of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
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Onose Y, Oki T, Yamada H, Manabe K, Kageji Y, Matsuoka M, Yamamoto T, Tabata T, Wakatsuki T, Ito S. Effect of cilnidipine on left ventricular diastolic function in hypertensive patients as assessed by pulsed Doppler echocardiography and pulsed tissue Doppler imaging. Jpn Circ J 2001; 65:305-9. [PMID: 11316128 DOI: 10.1253/jcj.65.305] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The purpose of the present study was to examine the mechanisms of improvement in left ventricular (LV) diastolic function in hypertensive patients treated with cilnidipine, a new and unique calcium antagonist that has both L-type and N-type voltage-dependent calcium channel blocking actions, using pulsed Doppler echocardiography and pulsed tissue Doppler imaging. The study comprised 35 untreated patients with essential hypertension (19 men and 16 women; mean age 65+/-10 years). The peak early diastolic and atrial systolic transmitral flow velocities (E and A, respectively) and their ratio (E/A), and the peak early diastolic and atrial systolic motion velocities (Ew and Aw, respectively) of the LV posterior wall and their ratio (Ew/Aw) were determined in all patients before and after 1, 3 and 6 months on cilnidipine (10 mg/day). One month: Systolic and diastolic blood pressures were significantly decreased. E and E/A were significantly increased, whereas there were no significant changes in Ew and Ew/Aw. Three months: Ew and Ew/Aw were significantly increased compared to those before and 1 month after cilnidipine. Six months: E and E/A were significantly increased compared with before and 3 months after cilnidipine, and Ew and Ew/Aw were significantly increased compared with before cilnidipine. Moreover, the LV mass index was significantly decreased compared to that before cilnidipine. In summary, changes in LV diastolic performance in patients with essential hypertension following cilnidipine treatment were biphasic with an initial increase in early diastolic transmitral flow velocity and a later increase in early diastolic LV wall motion velocity. The initial and later changes can be related to an acute change in afterload and a later improvement in LV relaxation.
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MESH Headings
- Aged
- Antihypertensive Agents/pharmacology
- Antihypertensive Agents/therapeutic use
- Blood Pressure/drug effects
- Calcium Channel Blockers/pharmacology
- Calcium Channel Blockers/therapeutic use
- Calcium Channels, L-Type/drug effects
- Calcium Channels, N-Type/drug effects
- Diastole/drug effects
- Dihydropyridines/pharmacology
- Dihydropyridines/therapeutic use
- Echocardiography, Doppler, Pulsed
- Female
- Humans
- Hypertension/complications
- Hypertension/diagnostic imaging
- Hypertension/drug therapy
- Hypertension/physiopathology
- Hypertrophy, Left Ventricular/diagnostic imaging
- Hypertrophy, Left Ventricular/drug therapy
- Hypertrophy, Left Ventricular/etiology
- Hypertrophy, Left Ventricular/physiopathology
- Male
- Middle Aged
- Systole/drug effects
- Treatment Outcome
- Ventricular Dysfunction, Left/drug therapy
- Ventricular Dysfunction, Left/etiology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Function, Left/drug effects
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Affiliation(s)
- Y Onose
- Second Department of Internal Medicine, School of Medicine, University of Tokushima, Japan
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Douchi T, Nakae M, Yamamoto S, Iwamoto I, Oki T, Nagata Y. A woman with isolated prolactin deficiency. Acta Obstet Gynecol Scand 2001; 80:368-70. [PMID: 11264615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- T Douchi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
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41
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Sekine N, Motokura T, Oki T, Umeda Y, Sasaki N, Hayashi M, Sato H, Fujita T, Kaneko T, Asano Y, Kikuchi K. Rapid loss of insulin secretion in a patient with fulminant type 1 diabetes mellitus and carbamazepine hypersensitivity syndrome. JAMA 2001; 285:1153-4. [PMID: 11231743 DOI: 10.1001/jama.285.9.1153] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
MESH Headings
- Aged
- Analgesics, Non-Narcotic/adverse effects
- Anemia, Hemolytic/complications
- Anemia, Hemolytic/etiology
- Anemia, Hemolytic, Autoimmune/complications
- Anemia, Hemolytic, Autoimmune/etiology
- C-Peptide/blood
- Carbamazepine/adverse effects
- Diabetes Mellitus, Type 1/complications
- Diabetes Mellitus, Type 1/etiology
- Diabetes Mellitus, Type 1/metabolism
- Diabetic Ketoacidosis/etiology
- Diabetic Ketoacidosis/metabolism
- Drug Eruptions/complications
- Drug Eruptions/etiology
- Female
- Herpesviridae Infections/complications
- Herpesvirus 6, Human
- Humans
- Insulin/metabolism
- Insulin Secretion
- Syndrome
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Abstract
OBJECTIVE To identify the effects of GnRH agonist therapy on body composition (lean and fat mass components) and body fat distribution. METHODS Fifteen women with uterine leiomyomas were given a GnRH agonist (leuprorelin acetate, 3.75 mg) monthly for 4 months. Weight, height, and body mass index (BMI, weight/height) were recorded. Regional and total body composition, trunk-leg fat ratio, bone mineral density of the lumbar spine (L2-L4), and total body were assessed by whole-body scanning with dual-energy x-ray absorptiometry before and after treatment. Uterine volume was measured by transabdominal ultrasonography. RESULTS The mean (+/- standard deviation [SD]) lean mass of total body, trunk, and leg decreased significantly (36.3 +/- 4.9 to 35.4 +/- 4.4 kg, P <.01; 18.8 +/- 2.8 to 18.1 +/- 2.8 kg, P <.05; and 11.4 +/- 1.8 to 11.1 +/- 1.6 kg, P <.05; respectively), whereas body fat mass, percentage of body fat, and trunk fat mass increased significantly (20.8 +/- 4.8 to 21.8 +/- 4.6 kg, P <.01; 34.9 +/- 5.9 to 36.5 +/- 5.2%, P <.01; and 8.6 +/- 3.0 to 9.3 +/- 3.0 kg, P <.01; respectively). Trunk-leg fat ratio increased significantly (1.03 +/- 0.32 to 1.12 +/- 0.33, P <.05). Weight, BMI, arm tissue composition (lean and fat mass components), and leg fat mass did not change during 4 months of GnRH agonist therapy. Bone mineral density and uterine volume decreased significantly. CONCLUSION Hypogonadism by GnRH agonist therapy induces lean mass loss, increased adiposity overall, and upper body fat accumulation.
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Affiliation(s)
- H Yamasaki
- Department of Obstetrics and Gynecology, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
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Ito S, Asahina M, Asahina M, Oki T, Hattori T. [Severe chronic pain with allodynia in Parkinson's disease: a case report]. Rinsho Shinkeigaku 2001; 41:147-9. [PMID: 11481860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
We report a 61-year-old man with Parkinson's disease, who had a 3-year history of severe chronic pain with allodynia in the lower extremities prior to motor symptoms. He always had tingling pain around the ankles, and tactile sensation induced severe burning pain expanding to the toes and thighs, so his pain was considered to be allodynia. Pain and motor symptoms were ameliorated by L-dopa therapy and exacerbated by withdrawal of L-dopa. Pain is known to occur in Parkinson's disease, but severe pain rarely occurs. To our knowledge, allodynia, which is usually recognized in causalgia or reflex sympathetic dystrophy, has never been reported in Parkinson's disease. Patients with Parkinson's disease may complain severe causalgia-like pain as an initial symptom.
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Affiliation(s)
- S Ito
- Department of Neurology, Chiba University School of Medicine, Chiba
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Abstract
Glutamine:fructose-6-phosphate amidotransferase (GFAT) is the first and rate-limiting enzyme of the hexosamine biosynthesis pathway, which plays an important role in glucose toxicity and cellular insulin resistance. Thus, the mechanisms by which GFAT expression is regulated under physiological and pathological conditions are of interest in connection with diabetes. In this study, we cloned the 5'-flanking region of the mouse GFAT2 gene and characterized its promoter activity. Sequence analysis revealed several putative regulatory elements Sp1, a CCAAT box, AP-1 and AP-2, but no TATA box. Transfection experiments showed that the 5'-flanking region between -2462 to +38 relative to the transcription start site of the GFAT2 gene drives transcription in NIH3T3 cells and that the fragment from -141 to -9 has the highest transcription activity. Reporter assays using deletion and mutant variants suggested that the Sp1 sites at positions -83 to -78 and -22 to -17 both play an important role in the basal promoter activity of the mouse GFAT2 gene. Electrophoretic mobility shift assay showed DNA-protein binding at both Sp1 sites. We also compared the promoter activities of mouse GFAT1 and GFAT2 in several cell lines.
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Affiliation(s)
- K Yamazaki
- Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3, Tokodai, Tsukuba, 300-2635, Ibaraki, Japan.
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Otani T, Yoshida KI, Kubota H, Kawai S, Ito S, Hori H, Ishiyama T, Oki T. Novel triene-beta-lactone antibiotics, oxazolomycin derivative and its isomer, produced by Streptomyces sp. KSM-2690. J Antibiot (Tokyo) 2000; 53:1397-400. [PMID: 11217805 DOI: 10.7164/antibiotics.53.1397] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- T Otani
- Research Institute, Tamagawa University, Machida, Tokyo, Japan
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Mishiro Y, Oki T, Yamada H, Onose Y, Matsuoka M, Tabata T, Wakatsuki T, Ito S. Use of angiotensin II stress pulsed tissue Doppler imaging to evaluate regional left ventricular contractility in patients with hypertrophic cardiomyopathy. J Am Soc Echocardiogr 2000; 13:1065-73. [PMID: 11119273 DOI: 10.1067/mje.2000.111010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
There is controversy concerning whether contract-ility in the nonhypertrophied region of the left ventricular (LV) wall is impaired or normal in patients with hypertrophic cardiomyopathy (HCM). Global LV systolic function decreases with increases in afterload in this disease. This study was performed to identify abnormalities in regional LV contractility along the long and short axes in the setting of HCM with the use of angiotensin II (AT-II) stress pulsed tissue Doppler imaging (PTDI). Angiotensin II was administered intravenously to patients with asymmetric septal hypertrophy (HCM group, n = 21) and age-matched normal volunteers (N group, n = 12). We then measured the percent LV fractional shortening (%FS) and end-systolic circumferential LV wall stress by M-mode echocardiography, LV ejection fraction (LVEF) by 2-dimensional echocardiography, and time-velocity integral (TVI) of LV outflow velocity by pulsed Doppler echocardiography. The peak first and second systolic LV wall motion velocities along the long (L-Sw(1) and L-Sw(2)) and short (S-Sw(1) and S-Sw(2)) axes were measured in the LV posterior wall and ventricular septum with the use of PTDI. The end-systolic circumferential LV wall stress at baseline was significantly lower in the HCM group. The L-Sw(1) and L-Sw(2) for the posterior wall were significantly lower in the HCM group, but the S-Sw(1) and S-Sw(2) for the posterior wall and ventricular septum were similar in the two groups. The %FS, LVEF, TVI, and systolic PTDI variables along both axes for the posterior wall decreased significantly, and end-systolic circumferential LV wall stress increased significantly at AT-II doses of 0.005 or 0.010 microg/kg per minute in the HCM group. No significant changes were found in either group in the systolic PTDI variables (except for L-Sw(1)) for the ventricular septum with AT-II infusion. Contractility along the long and short axes of the nonhypertrophied LV wall is easily impaired with increases in afterload in patients with HCM, resulting in a decrease in global LV systolic function. We found AT-II stress PTDI to be a safe and useful technique for evaluating the regional LV systolic function in this disease.
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Affiliation(s)
- Y Mishiro
- Second Department of Internal Medicine, School of Medicine, The University of Tokushima, Japan
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Yamada H, Oki T, Tabata T, Manabe K, Fukuda K, Abe M, Iuchi A, Ito S. Differences in transmitral flow velocity pattern during increase in preload in patients with abnormal left ventricular relaxation. Cardiology 2000; 89:152-8. [PMID: 9524018 DOI: 10.1159/000006772] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Changes in transmitral flow (TMF) and pulmonary venous flow (PVF) velocities during increases in preload were compared in patients with a higher peak atrial systolic velocity than peak early diastolic velocity (A/E > 1) for the TMF velocity to determine differences in hemodynamic response. Fifteen patients with dilated hearts, 22 with hypertrophied hearts and 15 control patients were studied. TMF and PVF velocities were recorded by transesophageal pulsed Doppler echocardiography before and during application of lower body positive pressure. The value for peak early diastolic velocity increased, while the isovolumic relaxation time decreased with increases in preload in all groups. The value for peak atrial systolic velocity decreased in the dilated-heart group, but increased in the hypertrophied-heart and control groups. The peak second systolic and early diastolic PVF velocities increased in the dilated- and hypertrophied-heart groups, but did not change in the control group. The peak atrial systolic PVF velocity and the difference in duration of the atrial systolic PVF and TMF velocities increased in the dilated- and hypertrophied-heart groups, and its changing rate was highest in the group with dilated hearts. These results suggest that both peak early diastolic and atrial systolic TMF velocities increase during increases in preload through the Frank-Starling mechanism in hypertrophied hearts. Furthermore, the left ventricular functional reserve was lower in the dilated-heart group. Thus, TMF and PVF velocities respond differently during increases in preload, depending on the underlying heart disease.
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Affiliation(s)
- H Yamada
- Second Department of Internal Medicine, Tokushima University School of Medicine, Japan
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Abstract
BACKGROUND Authors of recent studies have reported that there is a relationship between level of adhesion molecules and atherosclerosis. In an animal study it was demonstrated that there is an interaction between adhesion molecules and leukocytes in atherosclerotic tissue. OBJECTIVE To study the relationships between coronary-artery atherosclerosis and both differential blood-leukocyte count and concentrations of soluble adhesion molecules in patients with and without coronary artery disease (CAD). METHODS Our subjects were 168 patients who underwent diagnostic coronary angiography. Forty-eight patients had normal coronary angiograms (control group), and 120 patients had significant coronary-artery stenoses (diameter stenosis > 70%) in at least one major coronary-artery branch (CAD group). Total and differential blood-leukocyte counts, and concentrations of soluble intercellular adhesion molecule-1 (sICAM-1) and vascular cell adhesion molecule-1 (sVCAM-1) were assayed prior to angiography. RESULTS Monocyte counts for patients in the CAD group were significantly greater than those for patients in the control group (366 +/- 99 versus 258 +/- 44/microl, P < 0.0001), as were the sICAM-1 concentrations (272 +/- 52 versus 203 +/- 24 ng/ml, P < 0.0001). The mean concentrations of sVCAM-1 in members of the two groups were the same (671 +/- 138 versus 668 +/- 97 ng/ml, P=0.4). There was a higher incidence of significant coronary-artery stenosis among patients with both a high monocyte count and a high concentration of sICAM-1 (> or = mean + SD) than there was among patients with a low monocyte count and a low concentration of sICAM-1 (> or = mean - SD; 100 versus 25%, P < 0.0001). CONCLUSIONS Higher levels both of monocyte counts and of serum concentrations of ICAM-1 may serve as markers for coronary atherosclerosis.
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Affiliation(s)
- J Ikata
- The Second Department of Internal Medicine, School of Medicine, The University of Tokushima, Japan.
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Abstract
A new antifungal antibiotic xanthoepocin was isolated from the culture broth of Penicillium simplicissimum IFO5762. Xanthoepocin was obtained from the culture fluid by solvent extraction and chromatographic purification. It showed antibiotic activity against Gram-positive bacteria and yeasts.
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Affiliation(s)
- Y Igarashi
- Biotechnology Research Center, Toyama Prefectural University, Kosugi, Japan
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Abstract
The inhibitory effects of natural and synthetic inhibitors on the intestinal membrane-bound hydrolase, alpha-glucosidase (AGH), were evaluated by using an immobilized cyanogen bromide-activated Sepharose 4B support. Immobilized AGH (iAGH) inhibition study by synthetic inhibitors (acarbose and voglibose) revealed that the magnitude of inhibition differed from that in the free AGH (fAGH) study: IC50 value of acarbose in iAGH-maltase assay system, 340-430 nM; fAGH, 11 nM. iAGH-maltase inhibition by both inhibitors was influenced by blocking reagents with different functional groups (COOH, OH, CH3, and NH2 groups). On the other hand, significant iAGH-sucrase inhibitory activity was observed only when using the negatively charged support induced by 0.1 M beta-alanine. The Km values obtained in the iAGH assay system were similar to those from the fAGH method. With natural inhibitors, the iAGH-sucrase inhibitory activity of D-Xylose, with in vivo glucose suppression, increased twice compared to that in fAGH. Green tea extract gave almost the same inhibition for both AGH assay systems.
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Affiliation(s)
- T Oki
- Division of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School Kyushu University, Fukuoka, Japan
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