1
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Tsujisaka Y, Yamashita Y, Morimoto T, Takase T, Hiramori S, Kim K, Oi M, Akao M, Kobayashi Y, Chen PM, Murata K, Tsuyuki Y, Nishimoto Y, Sakamoto J, Togi K, Mabuchi H, Takabayashi K, Kato T, Ono K, Kimura T. Application of the RIETE score to identify low-risk patients with pulmonary embolism: From the COMMAND VTE Registry. Thromb Res 2023; 232:35-42. [PMID: 37922657 DOI: 10.1016/j.thromres.2023.10.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 09/18/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND The RIETE score could be specifically useful for identification of low-risk pulmonary embolism (PE) patients for home treatment. However, the external validation of the RIETE score has been limited. METHODS The COMMAND VTE Registry is a multicenter registry enrolling consecutive patients with acute symptomatic venous thromboembolism (VTE). The current study population consisted of 1479 patients with acute PE, who were divided into 2 groups; RIETE scores of 0 (N = 260) and ≥ 1 (N = 1219). RESULTS The cumulative 10-day and 30-day incidences of a composite endpoint of all-cause death, recurrent PE, or major bleeding were lower in patients with the RIETE score of 0 than in those with the RIETE score of ≥1 (10-day: 0.4 % vs. 6.7 %, P < 0.001, and 30-day: 0.4 % vs. 10.0 %, P < 0.001). The area under the receiver-operating characteristic curve (AUC) in the RIETE score for the 10-day composite endpoint showed numerically better predictive ability than that in the sPESI score (0.77 vs. 0.73, P = 0.07), and the AUC in the RIETE score for the 30-day composite endpoint showed significantly better predictive ability than that in the sPESI score (0.77 vs. 0.71, P = 0.003). CONCLUSIONS The RIETE score was well validated in the current large real-world registry. The RIETE score of 0 could identify patients with reasonably low risks of the 10-day and 30-day composite endpoint of all-cause death, recurrent PE, or major bleeding.
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Affiliation(s)
- Yuta Tsujisaka
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yugo Yamashita
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Takeshi Morimoto
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Toru Takase
- Department of Cardiology, Kinki University Hospital, Osaka, Japan
| | - Seiichi Hiramori
- Department of Cardiology, Kokura Memorial Hospital, Kokura, Japan
| | - Kitae Kim
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Maki Oi
- Department of Cardiology, Japanese Red Cross Otsu Hospital, Otsu, Japan
| | - Masaharu Akao
- Department of Cardiology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Yohei Kobayashi
- Department of Cardiovascular Center, Osaka Red Cross Hospital, Osaka, Japan
| | - Po-Min Chen
- Department of Cardiology, Osaka Saiseikai Noe Hospital, Osaka, Japan
| | - Koichiro Murata
- Department of Cardiology, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - Yoshiaki Tsuyuki
- Division of Cardiology, Shimada Municipal Hospital, Shimada, Japan
| | - Yuji Nishimoto
- Department of Cardiology, Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Japan
| | - Jiro Sakamoto
- Department of Cardiology, Tenri Hospital, Tenri, Japan
| | - Kiyonori Togi
- Division of Cardiology, Nara Hospital, Kinki University Faculty of Medicine, Ikoma, Japan
| | - Hiroshi Mabuchi
- Department of Cardiology, Koto Memorial Hospital, Higashiomi, Japan
| | | | - Takao Kato
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Koh Ono
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takeshi Kimura
- Department of Cardiology, Hirakata Kohsai Hospital, Hirakata, Japan
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2
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Kasamoto M, Funakoshi S, Hatani T, Okubo C, Nishi Y, Tsujisaka Y, Nishikawa M, Narita M, Ohta A, Kimura T, Yoshida Y. Am80, a retinoic acid receptor agonist, activates the cardiomyocyte cell cycle and enhances engraftment in the heart. Stem Cell Reports 2023; 18:1672-1685. [PMID: 37451261 PMCID: PMC10444569 DOI: 10.1016/j.stemcr.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 07/18/2023] Open
Abstract
Human induced pluripotent stem cell-derived (hiPSC) cardiomyocytes are a promising source for regenerative therapy. To realize this therapy, however, their engraftment potential after their injection into the host heart should be improved. Here, we established an efficient method to analyze the cell cycle activity of hiPSC cardiomyocytes using a fluorescence ubiquitination-based cell cycle indicator (FUCCI) system. In vitro high-throughput screening using FUCCI identified a retinoic acid receptor (RAR) agonist, Am80, as an effective cell cycle activator in hiPSC cardiomyocytes. The transplantation of hiPSC cardiomyocytes treated with Am80 before the injection significantly enhanced the engraftment in damaged mouse heart for 6 months. Finally, we revealed that the activation of endogenous Wnt pathways through both RARA and RARB underlies the Am80-mediated cell cycle activation. Collectively, this study highlights an efficient method to activate cell cycle in hiPSC cardiomyocytes by Am80 as a means to increase the graft size after cell transplantation into a damaged heart.
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Affiliation(s)
- Manabu Kasamoto
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Department of Cardiovascular Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Shunsuke Funakoshi
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Takeda-CiRA Joint program (T-CiRA), Fujisawa, Japan.
| | - Takeshi Hatani
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Chikako Okubo
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Yohei Nishi
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Yuta Tsujisaka
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Department of Cardiovascular Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Misato Nishikawa
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Megumi Narita
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Akira Ohta
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Yoshinori Yoshida
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Takeda-CiRA Joint program (T-CiRA), Fujisawa, Japan.
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3
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Tian Y, Tsujisaka Y, Li VY, Tani K, Lucena-Cacace A, Yoshida Y. Immunosuppressants Tacrolimus and Sirolimus revert the cardiac antifibrotic properties of p38-MAPK inhibition in 3D-multicellular human iPSC-heart organoids. Front Cell Dev Biol 2022; 10:1001453. [PMID: 36438566 PMCID: PMC9692097 DOI: 10.3389/fcell.2022.1001453] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 10/27/2022] [Indexed: 11/15/2023] Open
Abstract
Cardiac reactive fibrosis is a fibroblast-derived maladaptive process to tissue injury that exacerbates an uncontrolled deposition of large amounts of extracellular matrix (ECM) around cardiomyocytes and vascular cells, being recognized as a pathological entity of morbidity and mortality. Cardiac fibrosis is partially controlled through the sustained activation of TGF-β1 through IL-11 in fibroblasts. Yet, preclinical studies on fibrosis treatment require human physiological approaches due to the multicellular crosstalk between cells and tissues in the heart. Here, we leveraged an iPSC-derived multi-lineage human heart organoid (hHO) platform composed of different cardiac cell types to set the basis of a preclinical model for evaluating drug cardiotoxicity and assessing cardiac fibrosis phenotypes. We found that the inhibition of the p38-MAPK pathway significantly reduces COL1A1 depositions. Yet, concomitant treatment with organ-rejection immunosuppressant drugs Tacrolimus or Sirolimus reverts this effect, opening new questions on the clinical considerations of combined therapies in reducing fibrosis after organ transplantation.
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Affiliation(s)
- Yu Tian
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
- Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yuta Tsujisaka
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Vanessa Y. Li
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
- Wellesley College, Wellesley, MA, United States
| | - Kanae Tani
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
- Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | | | - Yoshinori Yoshida
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
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4
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Tsujisaka Y, Hatani T, Okubo C, Ito R, Kimura A, Narita M, Chonabayashi K, Funakoshi S, Lucena-Cacace A, Toyoda T, Osafune K, Kimura T, Saito H, Yoshida Y. Purification of human iPSC-derived cells at large scale using microRNA switch and magnetic-activated cell sorting. Stem Cell Reports 2022; 17:1772-1785. [PMID: 35688152 PMCID: PMC9287667 DOI: 10.1016/j.stemcr.2022.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 11/26/2022] Open
Abstract
For regenerative cell therapies using pluripotent stem cell (PSC)-derived cells, large quantities of purified cells are required. Magnetic-activated cell sorting (MACS) is a powerful approach to collect target antigen-positive cells; however, it remains a challenge to purify various cell types efficiently at large scale without using antibodies specific to the desired cell type. Here we develop a technology that combines microRNA (miRNA)-responsive mRNA switch (miR-switch) with MACS (miR-switch-MACS) to purify large amounts of PSC-derived cells rapidly and effectively. We designed miR-switches that detect specific miRNAs expressed in target cells and controlled the translation of a CD4-coding transgene as a selection marker for MACS. For the large-scale purification of induced PSC-derived cardiomyocytes (iPSC-CMs), we transferred miR-208a-CD4 switch-MACS and obtained purified iPSC-CMs efficiently. Moreover, miR-375-CD4 switch-MACS highly purified pancreatic insulin-producing cells and their progenitors expressing Chromogranin A. Overall, the miR-switch-MACS method can efficiently purify target PSC-derived cells for cell replacement therapy. MiR-208a-CD4 switch-MACS can purify a large amount of iPSC-CMs in a short time MiR-208a switch can purify iPSC-CMs in each subtype-specific protocol MiR-375-CD4 switch-MACS can be applied to pancreatic endocrine precursor cells MiR-switch-MACS method can be efficient for large-scale target cell purification
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Affiliation(s)
- Yuta Tsujisaka
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan; Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Takeshi Hatani
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan; Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Chikako Okubo
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Ryo Ito
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Azuma Kimura
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Megumi Narita
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Kazuhisa Chonabayashi
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan; Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Shunsuke Funakoshi
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan; Takeda-CiRA Joint Program (T-CiRA), Fujisawa 251-0012, Japan
| | - Antonio Lucena-Cacace
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Taro Toyoda
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Kenji Osafune
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hirohide Saito
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan.
| | - Yoshinori Yoshida
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan; Takeda-CiRA Joint Program (T-CiRA), Fujisawa 251-0012, Japan.
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5
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Tsujisaka Y, Kaji S, Kim K, Pak M, Sasaki Y, Kitai T, Kobori A, Furukawa Y. Mechanism of improvement in atrial functional mitral regurgitation after catheter ablation for atrial fibrillation: Three-dimensional analysis using multislice computed tomography. J Card Surg 2021; 37:314-321. [PMID: 34734658 DOI: 10.1111/jocs.16120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 07/17/2021] [Revised: 10/17/2021] [Accepted: 10/18/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Several factors associated with atrial functional mitral regurgitation development have been reported; however, geometric changes in the mitral apparatus after catheter ablation for atrial fibrillation have not been sufficiently investigated. This study aimed to clarify what determines improvements in atrial functional mitral regurgitation after sinus rhythm restoration in patients who underwent catheter ablation for atrial fibrillation by using multislice computed tomography. METHODS We analysed volumetric multislice computed tomography images of 44 atrial fibrillation patients with significant atrial functional mitral regurgitation (moderate or worse) before and after catheter ablation. We measured the three-dimensional geometry of the mitral apparatus including the mitral annular area and interpapillary muscle distance. We calculated the differences before and after catheter ablation (Δmitral annular area, Δinterpapillary muscle distance) and assessed mitral regurgitation severity based on the mitral regurgitant jet area and its changes before and after catheter ablation (Δjet area) using transthoracic echocardiography. RESULTS After catheter ablation, the jet area was significantly decreased. The left ventricular ejection fraction was significantly increased and the left ventricular volume had a decreasing trend. The Δjet area was significantly correlated with the Δinterpapillary muscle distance (r = .43; p = .004). The Δinterpapillary muscle distance was the strongest determinant of improvements in atrial functional mitral regurgitation severity (p = .026). CONCLUSIONS Decreased interpapillary muscle distance was strongly associated with improvements in atrial functional mitral regurgitation. Amelioration of left ventricular dysfunction by sinus rhythm restoration might be related to improvements in atrial functional mitral regurgitation after catheter ablation.
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Affiliation(s)
- Yuta Tsujisaka
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Shuichiro Kaji
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Kitae Kim
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Misun Pak
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Yasuhiro Sasaki
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Takeshi Kitai
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Atsushi Kobori
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Yutaka Furukawa
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
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6
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Hata R, Yamashita Y, Morimoto T, Kadota K, Amano H, Murai R, Osakada K, Sano A, Takase T, Hiramori S, Kim K, Oi M, Akao M, Doi K, Kobayashi Y, Toyofuku M, Izumi T, Tada T, Chen PM, Murata K, Tsuyuki Y, Saga S, Nishimoto Y, Sasa T, Sakamoto J, Kinoshita M, Togi K, Mabuchi H, Takabayashi K, Tsujisaka Y, Seko Y, Matsushita K, Yoneda F, Kato T, Ono K, Kimura T. Periprocedural management and clinical outcomes of invasive procedures after venous thromboembolism: from the COMMAND VTE registry. J Thromb Thrombolysis 2021; 53:540-549. [PMID: 34524599 DOI: 10.1007/s11239-021-02564-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/31/2021] [Indexed: 02/02/2023]
Abstract
Anticoagulation therapy is prescribed for the prevention of recurrence in patients with venous thromboembolism, which could be temporarily interrupted during invasive procedures. The COMMAND VTE Registry is a multicenter registry enrolling 3027 consecutive patients with acute symptomatic VTE in Japan between January 2010 and August 2014. We identified patients who underwent invasive procedures during the entire follow-up period and evaluated periprocedural managements and clinical outcomes at 30 days after invasive procedures. During a median follow-up period of 1213 (IQR: 847-1764) days, 518 patients underwent invasive procedures with the cumulative incidences of 5.8% at 3 months, 11.1% at 1 year, and 24.0% at 5 years. Among 382 patients in high bleeding-risk category of invasive procedures, anticoagulation therapy had been discontinued already in 62 patients (16%) and interrupted temporarily in 288 patients (75%) during the invasive procedures with bridging anticoagulation therapy with heparin in 214 patients (56%). Among 80 patients in low bleeding-risk category, anticoagulation therapy had been already discontinued in 15 patients (19%) and interrupted temporarily in 31 patients (39%) during invasive procedure with bridging anticoagulation therapy with heparin in 17 patients (21%). At 30 days after the invasive procedures, 14 patients (2.7%) experienced recurrent VTE, while 28 patients (5.4%) had major bleeding. This study elucidated the real-world features of peri-procedural management and prognosis in patients with VTE who underwent invasive procedures during follow-up in the large multicenter VTE registry. The 30-day incidence rates of recurrent VTE and major bleeding events were 2.7% and 5.4%.
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Affiliation(s)
- Reo Hata
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.,Department of Cardiovascular Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Yugo Yamashita
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Takeshi Morimoto
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Kazushige Kadota
- Department of Cardiovascular Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Hidewo Amano
- Department of Cardiovascular Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Ryosuke Murai
- Department of Cardiovascular Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Kohei Osakada
- Department of Cardiovascular Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Arata Sano
- Department of Cardiovascular Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Toru Takase
- Department of Cardiology, Kinki University Hospital, Osaka, Japan
| | - Seiichi Hiramori
- Department of Cardiology, Kokura Memorial Hospital, Kokura, Japan
| | - Kitae Kim
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Maki Oi
- Department of Cardiology, Japanese Red Cross Otsu Hospital, Otsu, Japan
| | - Masaharu Akao
- Department of Cardiology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Kosuke Doi
- Department of Cardiology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Yohei Kobayashi
- Department of Cardiovascular Center, Osaka Red Cross Hospital, Osaka, Japan
| | - Mamoru Toyofuku
- Department of Cardiology, Japanese Red Cross Wakayama Medical Center, Wakayama, Japan
| | - Toshiaki Izumi
- Cardiovascular Center, The Tazuke Kofukai Medical Research Institute, Kitano Hospital, Osaka, Japan
| | - Tomohisa Tada
- Department of Cardiology, Shizuoka General Hospital, Shizuoka, Japan
| | - Po-Min Chen
- Department of Cardiology, Osaka Saiseikai Noe Hospital, Osaka, Japan
| | - Koichiro Murata
- Department of Cardiology, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - Yoshiaki Tsuyuki
- Division of Cardiology, Shimada Municipal Hospital, Shimada, Japan
| | - Syunsuke Saga
- Department of Cardiology, Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Japan
| | - Yuji Nishimoto
- Department of Cardiology, Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Japan
| | - Tomoki Sasa
- Department of Cardiology, Kishiwada City Hospital, Kishiwada, Japan
| | - Jiro Sakamoto
- Department of Cardiology, Tenri Hospital, Tenri, Japan
| | | | - Kiyonori Togi
- Division of Cardiology, Faculty of Medicine, Nara Hospital, Kinki University, Ikoma, Japan
| | - Hiroshi Mabuchi
- Department of Cardiology, Koto Memorial Hospital, Higashiomi, Japan
| | | | - Yuta Tsujisaka
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Yuta Seko
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Kazuki Matsushita
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Fumiya Yoneda
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Takao Kato
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Koh Ono
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.
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7
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Aizawa N, Konishi M, Kitai T, Tsujisaka Y, Kawase Y, Shimada N, Tamura K, Kimura K, Ohya Y. Infrequent use of nighttime dialysis for emergency admission due to worsening heart failure in patients on maintenance hemodialysis. Ther Apher Dial 2021; 26:85-93. [PMID: 33686756 DOI: 10.1111/1744-9987.13644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/22/2021] [Accepted: 03/06/2021] [Indexed: 11/30/2022]
Abstract
In the emergency admission due to worsening heart failure (HF) in patients on maintenance hemodialysis, emergent dialysis may be indicated, which increases personnel expenses. To clarify the characteristics and in-hospital management of the patients, we conducted a multicenter retrospective study including 142 patients on maintenance hemodialysis emergently admitted for worsening HF (71.6 ± 9.2 years, 69.0% male, 44.4% HF with preserved [≥50%] ejection fraction). The interval between last hemodialysis and admission was long (median 55 h), suggesting that fluid accumulation triggered HF events. Although most patients (73.9%) were admitted in the nighttime (5 p.m. to 9 a.m.), only 17.9% of them needed nighttime dialysis and were managed medically until the first in-hospital dialysis, with the use of noninvasive positive pressure ventilation in 45.1% and oxygen supplementation in 95.8%. While patients on hemodialysis with worsening HF were frequently admitted in the nighttime, nighttime dialysis was indicated in a limited population.
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Affiliation(s)
- Naoki Aizawa
- Department of Cardiovascular Medicine, Nephrology and Neurology, University of the Ryukyus School of Medicine, Okinawa, Japan
| | - Masaaki Konishi
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Takeshi Kitai
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Yuta Tsujisaka
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Yuichi Kawase
- Department of Cardiovascular Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Noriaki Shimada
- Department of Nephrology, Kurashiki Central Hospital, Kurashiki, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Kazuo Kimura
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Yusuke Ohya
- Department of Cardiovascular Medicine, Nephrology and Neurology, University of the Ryukyus School of Medicine, Okinawa, Japan
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8
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Tsujisaka Y, Kitai T, Kaji S, Kinoshita M, Nakamura K, Koyama T, Furukawa Y. Sole Obstruction of the Inferior Mesenteric Artery With Acute Aortic Dissection Causing Critical Mesenteric Ischemia. JACC Case Rep 2020; 2:2465-2469. [PMID: 34317195 PMCID: PMC8304554 DOI: 10.1016/j.jaccas.2020.07.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 06/08/2020] [Accepted: 07/16/2020] [Indexed: 01/16/2023]
Abstract
Inferior mesenteric artery obstruction rarely causes critical mesenteric ischemia, because of the good collateral blood supply. We report a rare case of critical mesenteric ischemia due to sole inferior mesenteric artery obstruction accompanied by acute aortic dissection. Early diagnosis and treatment of mesenteric ischemia are important. (Level of Difficulty: Advanced.)
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Affiliation(s)
- Yuta Tsujisaka
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Takeshi Kitai
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
- Address for correspondence: Dr. Takeshi Kitai, Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, 2-1-1 Minatojima-minamimachi, Chuo-ku, Kobe 6500047, Japan.
| | - Shuichiro Kaji
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Makoto Kinoshita
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Ken Nakamura
- Department of Cardiovascular Surgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Tadaaki Koyama
- Department of Cardiovascular Surgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Yutaka Furukawa
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
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9
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Nishiura N, Kitai T, Masumoto A, Miyawaki N, Miyoshi Y, Tsujisaka Y, Kono H, Paku M, Toyoda T, Sasaki Y, Kim K, Ehara N, Kobori A, Kinoshita M, Kaji S, Furukawa Y. LONG-TERM CLINICAL OUTCOMES OF SEVERE TRICUSPID REGURGITATION WITHOUT LEFT-SIDE VALVE DISEASE. J Am Coll Cardiol 2020. [DOI: 10.1016/s0735-1097(20)32781-9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Chaen H, Nishimoto T, Nakada T, Fukuda S, Kurimoto M, Tsujisaka Y. Enzymatic synthesis of kojioligosaccharides using kojibiose phosphorylase. J Biosci Bioeng 2005; 92:177-82. [PMID: 16233080 DOI: 10.1263/jbb.92.177] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2001] [Accepted: 05/24/2001] [Indexed: 11/17/2022]
Abstract
We have attempted to synthesize kojioligosaccharides (oligosaccharides having the alpha-1,2 glycosidic linkage at the nonreducing end) using two methods. In the first, mixtures of various proportions of glucose and beta-D-glucose-1-phosphate (beta-G1P) were allowed to react in the presence of kojibiose phosphorylase (KPase). In the second, maltose was allowed to react with KPase and maltose phosphorylase (MPase) simultaneously. In the former method, kojioligosaccharides having only the alpha-1,2 glucosidic linkage were synthesized and the average degree of polymerization (D.P.) of oligosaccharides increased with decreasing proportions of glucose. In the second method, kojioligosaccharides were obtained at approximately 70% yields under optimum conditions. 4-alpha-D-Kojibiosyl-glucose, kojitriose and kojitetraose, the principal kojioligosaccharides synthesized, were not hydrolyzed by salivary amylase, artificial gastric juice, pancreatic amylase, or small intestinal enzymes.
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Affiliation(s)
- H Chaen
- Hayashibara Biochemical Laboratories Inc., 7-7 Amase-minami machi, Okayama 700-0834, Japan.
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11
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Chaen H, Nishimoto T, Nakada T, Fukuda S, Kurimoto M, Tsujisaka Y. Enzymatic Synthesis of Novel Oligosaccharides from L-Sorbose, Maltose, and Sucrose Using Kojibiose Phosphorylase. J Biosci Bioeng 2001; 92:173-6. [PMID: 16233079 DOI: 10.1263/jbb.92.173] [Citation(s) in RCA: 6] [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] [Received: 04/05/2001] [Accepted: 05/24/2001] [Indexed: 11/17/2022]
Abstract
Glucosyl-L-sorbose, -maltose, and -sucrose were synthesized using kojibiose phosphorylase (KPase) from Thermoanaerobacter brockii ATCC35047 with beta-D-glucose-1-phosphate (beta-G1P) as a glucosyl donor. One disaccharide and two trisaccharides thus synthesized were isolated by Toyopearl HW-40S column chromatography. The results of KPase digestion, methylation analysis, and 13C-NMR studies indicated that these oligosaccharides were alpha-D-glucopyranosyl-(1-->5)-alpha-L-sorbopyranose, alpha-D-glucopyranosyl-(1-->2)-alpha-D-glucopyranosyl-(1-->4)-D-glucopyranose (4-alpha-D-kojibiosyl-glucose), and alpha-D-glucopyranosyl-(1-->2)-alpha-D-glucopyranosyl-(1-->2)-beta-D-fructofuranoside, which are all novel oligosaccharides. Glucosyl-L-sorbose was partially hydrolyzed to glucose and L-sorbose by alpha-glucosidases, while glucosyl-sucrose and glucosyl-maltose were not hydrolyzed by glucoamylase, alpha-glucosidases, or CGTase.
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Affiliation(s)
- H Chaen
- Hayashibara Biochemical Laboratories Inc., 7-7 Amase-minami machi, Okayama 700-0834, Japan.
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12
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Kurimoto M, Tsusaki K, Kubota M, Fukuda S, Tsujisaka Y. Cloning and sequencing of the beta-fructofuranosidase gene from Bacillus sp. V230. Biosci Biotechnol Biochem 1999; 63:1107-11. [PMID: 10427700 DOI: 10.1271/bbb.63.1107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The beta-fructofuranosidase gene (bff) from Bacillus sp. V230 has been cloned in Escherichia coli and its nucleotide sequence has been analyzed. The product of bff consists of a signal sequence of 32 amino acid (a.a.) residues for secretion and 455 a.a. residues of the extracellular beta-fructofuranosidase. The a.a. sequence of the bff product has similarities with those of the Bacillus subtilis levanscrase (63.7% identity), the Streptococcus mutans fructosyltransferase (33.7%), and the Zymomonas mobilis levanscrase and beta-fructofuranosidase (15%).
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Affiliation(s)
- M Kurimoto
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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13
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Kurimoto M, Tabuchi A, Mandai T, Shibuya T, Chaen H, Fukuda S, Sugimoto T, Tsujisaka Y. Synthesis of glycosyl-trehaloses by cyclomaltodextrin glucanotransferase through the transglycosylation reaction. Biosci Biotechnol Biochem 1997; 61:1146-9. [PMID: 9255978 DOI: 10.1271/bbb.61.1146] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Cyclomaltodextrin glucanotransferase from Bacillus stearothermophilus produced a series of glycosyl-trehaloses through the transglycosylation reaction with cyclomaltohexaose as the glycosyl donor and trehalose as its acceptor. After beta-amylase treatment, five species of glycosyl-trehaloses were isolated by column chromatography. After chemical and enzymatic analyses, it was concluded that these oligosaccharides were alpha-maltosyl alpha-D-glucopyranoside, alpha-maltotriosyl alpha-D-glucopyranoside, alpha-maltosyl alpha-maltoside, alpha-maltotriosyl alpha-maltoside, and alpha-maltotriosyl alpha-maltotrioside. These were not hydrolyzed by salivary amylase, artificial gastric juice, or pancreatic amylase, however they were hydrolyzed by enzymes of the small intestine.
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Affiliation(s)
- M Kurimoto
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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14
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Kurimoto M, Nishimoto T, Nakada T, Chaen H, Fukuda S, Tsujisaka Y. Synthesis by an alpha-glucosidase of glycosyl-trehaloses with an isomaltosyl residue. Biosci Biotechnol Biochem 1997; 61:699-703. [PMID: 9145529 DOI: 10.1271/bbb.61.699] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Glycosyl-trehaloses with an isomaltosyl residue were synthesized by alpha-glucosidase from Aspergillus niger by using maltotetraose as a glucosyl donor and trehalose as the acceptor. The one trisaccharide and two tetrasaccharides formed were isolated by successive column chromatography. The results of an enzymatic digestion, methylation analysis, and 13C-NMR studies indicated that these oligosaccharides were alpha-isomaltosyl alpha-glucoside, alpha-isomaltotriosyl alpha-glucoside and alpha-isomaltoside. These oligosaccharides were not fermented to an acid by Streptococcus mutans, and they effectively inhibited water-insoluble glucan synthesis from sucrose by glucosyltransferase. In an in vitro utilization test with human intestinal bacteria, these oligosaccharides were predominantly utilized by Bifidobacteria.
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Affiliation(s)
- M Kurimoto
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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15
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Nishimoto T, Nakano M, Nakada T, Chaen H, Fukuda S, Sugimoto T, Kurimoto M, Tsujisaka Y. Purification and properties of a novel enzyme, trehalose synthase, from Pimelobacter sp. R48. Biosci Biotechnol Biochem 1996; 60:640-4. [PMID: 8829531 DOI: 10.1271/bbb.60.640] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A novel enzyme, trehalose synthase, was purified from a cell-free extract of Pimelobacter sp. R48 to an electrophoretically homogeneous state by successive chromatographies on DEAE-Toyopearl 650, Butyl-Toyopearl 650, and Mono Q HR5/5 columns. The molecular weight of the enzyme was estimated to be 62,000 by SDS-polyacrylamide gel electrophoresis, and the enzyme had a pI of 4.6 by gel isoelectrofocusing. The enzyme catalyzed the conversion of maltose into trehalose by intramolecular transglucosylation. The enzyme also converted into maltose but was inactive on other saccharides. The N-terminal amino acid of the enzyme was serine. The optimum pH and temperature were pH7.5 and 20 degrees C, respectively. The enzyme was stable in the range of pH 6.0-9.0 and up to 30 degrees C for 60 min. The rate of conversion of maltose into trehalose was independent of the maltose concentration. The maximum yield of trehalose from maltose were 81.8%, 80.9%, and 76.7% at 5, 15, and 25 degrees C, respectively. The activity was inhibited by Cu2+, Hg2+, Ni2+, Zn2+, and Tris.
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Affiliation(s)
- T Nishimoto
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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Nakada T, Ikegami S, Chaen H, Kubota M, Fukuda S, Sugimoto T, Kurimoto M, Tsujisaka Y. Purification and characterization of thermostable maltooligosyl trehalose synthase from the thermoacidophilic archaebacterium Sulfolobus acidocaldarius. Biosci Biotechnol Biochem 1996; 60:263-6. [PMID: 9063973 DOI: 10.1271/bbb.60.263] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [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: 02/03/2023]
Abstract
A thermostable maltooligosyl trehalose synthase was purified from a cell-free extract of the thermoacidophilic archaebacterium Sulfolobus acidocaldarius ATCC 33909 to an electrophoretically homogeneous state by successive column chromatography on Sepabeads FP-DA13, Butyl-Toyopearl 650M, DEAE-Toyopearl 650S, Ultrogel AcA44, and Mono Q. The enzyme had a molecular mass of 74,000 by SDS-polyacrylamide gel electrophoresis and a pI of 5.9 by gel isoelectrofocusing. The N-terminal amino acid of the enzyme was methionine. The enzyme showed the highest activity from pH 5.0 to 5.5 and at 75 degrees C, and was stable from pH 4.5 to 9.5 and up to 85 degrees C. The enzyme activity was inhibited by Hg2+ and Cu2+. The Kms of the enzyme for maltotetraose, maltopentaose, maltohexaose, maltoheptaose, and short chain amylose (DP 18) were 41.5 mM, 7.1 mM, 5.7 mM, 1.4 mM, and 0.6 mM, respectively.
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Affiliation(s)
- T Nakada
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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Nakada T, Ikegami S, Chaen H, Kubota M, Fukuda S, Sugimoto T, Kurimoto M, Tsujisaka Y. Purification and characterization of thermostable maltooligosyl trehalose trehalohydrolase from the thermoacidophilic archaebacterium Sulfolobus acidocaldarius. Biosci Biotechnol Biochem 1996; 60:267-70. [PMID: 9063974 DOI: 10.1271/bbb.60.267] [Citation(s) in RCA: 31] [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: 02/03/2023]
Abstract
A thermostable maltooligosyl trehalose trehalohydrolase from the thermoacidophilic archaebacterium Sulfolobus acidocaldarius ATCC 33909 was purified from a cell-free extract to an electrophoretically pure state by successive column chromatographies on Sepabeads FP-DA13, Butyl-Toyopearl 650M, DEAE-Toyopearl 650S, Toyopearl HW-55S and Ultrogel AcA44. The enzyme had a molecular mass of 59,000 by SDS-polyacrylamide gel electrophoresis and a pI of 6.1 by gel isoelectrofocusing. The N-terminal amino acid of the enzyme was methionine. The enzyme showed the highest activity from pH 5.5 to 6.0 and at 75 degrees C, and was stable from pH 5.5 to 9.5 and up to 85 degrees C. The activity was inhibited by Hg2+, Cu2+, Fe2+, Pb2+, and Zn2+. The Km values of the enzyme for maltosyl trehalose, maltotriosyl trehalose, maltotetraosyl trehalose, and maltopentaosyl trehalose were 16.7 mM, 2.7 mM, 3.7 mM, and 4.9 mM, respectively.
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Affiliation(s)
- T Nakada
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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18
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Nakada T, Maruta K, Tsusaki K, Kubota M, Chaen H, Sugimoto T, Kurimoto M, Tsujisaka Y. Purification and properties of a novel enzyme, maltooligosyl trehalose synthase, from Arthrobacter sp. Q36. Biosci Biotechnol Biochem 1995; 59:2210-4. [PMID: 8611744 DOI: 10.1271/bbb.59.2210] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Arthrobacter sp. Q36 produces a novel enzyme, maltooligosyl trehalose synthase, which catalyzes the conversion of maltooligosaccharide into the non-reducing saccharide, maltooligosyl trehalose (alpha-maltooligosyl alpha-D-glucoside) by intramolecular transglycosylation. The enzyme was purified from a cell-free extract to an electrophoretically homogeneous state by successive column chromatography on Sepabeads FP-DA13, DEAE-Sephadex A-50, Ultrogel AcA44, and Butyl-Toyopearl 650M. The enzyme was specific for maltooligosaccharides except maltose, and catalyzed the conversion to form maltooligosyl trehalose. The Km of the enzyme for maltotetraose, maltopentaose, maltohexaose, and maltoheptaose were 22.9 mM, 8.7 mM, 1.4 mM, and 0.9 mM, respectively. The enzyme had a molecular mass of 81,000 by SDS-polyacrylamide gel electrophoresis and a pI of 4.1 by gel isoelectrofocusing. The N-terminal and C-terminal amino acids of the enzyme were methionine and serine, respectively. The enzyme showed the highest activity at pH 7.0 and 40 degrees C, and was stable from pH 6.0 to 9.5 and up to 40 degrees C. The enzyme activity was inhibited by Hg2+ and Cu2+.
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Affiliation(s)
- T Nakada
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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Nakada T, Maruta K, Mitsuzumi H, Kubota M, Chaen H, Sugimoto T, Kurimoto M, Tsujisaka Y. Purification and characterization of a novel enzyme, maltooligosyl trehalose trehalohydrolase, from Arthrobacter sp. Q36. Biosci Biotechnol Biochem 1995; 59:2215-8. [PMID: 8611745 DOI: 10.1271/bbb.59.2215] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A novel enzyme, maltooligosyl trehalose trehalohydrolase from Arthrobacter sp. Q36 was purified from a cell-free extract to an electrophoretically pure state by successive column chromatography on Sepabeads FP-DA13, Butyl-Toyopearl 650M, DEAE-Toyopearl 650S, and Toyopearl HW-55S. The enzyme specifically catalyzed the hydrolysis of the alpha-1,4-glucosidic linkage that bound the maltooligosyl and trehalose moieties of maltooligosyl trehalose. The Km of the enzyme for maltosyl trehalose, maltotriosyl trehalose, maltotetraosyl trehalose, and maltopentaosyl trehalose was 5.5 mM, 4.6 mM, 7.0 mM, and 4.2 mM, respectively. The enzyme had a molecular mass of 62,000 by SDS-polyacrylamide gel electrophoresis and a pI of 4.1 by gel isoelectrofocusing. The N-terminal amino acid of the enzyme was threonine. The enzyme showed the highest activity at pH 6.5 and 45 degrees C, and was stable from pH 5.0 to 10.0 and up to 45 degrees C. The activity was inhibited by Hg2+, Cu2+, Fe2+, and Zn2+.
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Affiliation(s)
- T Nakada
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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20
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Maruta K, Nakada T, Kubota M, Chaen H, Sugimoto T, Kurimoto M, Tsujisaka Y. Formation of trehalose from maltooligosaccharides by a novel enzymatic system. Biosci Biotechnol Biochem 1995; 59:1829-34. [PMID: 8534970 DOI: 10.1271/bbb.59.1829] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- K Maruta
- Hayashibara Biochemical Laboratories, Inc., 7-7 Amase-minamimachi, Okayama 700, Japan
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21
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Nakada T, Kubota M, Sakai S, Tsujisaka Y. Purification and characterization of two forms of maltotetraose-forming amylase from Pseudomonas stutzeri. Agric Biol Chem 1990; 54:737-43. [PMID: 1368535] [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: 03/25/2023]
Abstract
Pseudomonas stutzeri MO-19 produced two active forms of extracellular maltotetraose-forming amylase. Both forms, G4-1 and G4-2, were purified to electrophoretic homogeneity. The molecular masses of G4(-1) and G4(-2) were 57 kd and 46 kd by SDS-polyacrylamide gel electrophoresis, respectively. An identical N-terminal sequence up to 20 amino acid residues and similar amino acid compositions were obtained from both forms, but different C-terminal amino acids, leucine from G4(-1) and alanine from G4(-2), were released by carboxypeptidase Y. By in vitro incubation with a culture supernatant containing protease activity, G4(-1) was converted into G4(-2) without any loss of the amylase activity. It was concluded that G4(-2) was a product derived by the limited proteolysis of G4(-1), and that the proteolysis occurred in the C-terminal region of G4-1. G4-2 was more thermostable than G4(-1), and had a 20-fold higher Michaelis constant value for glycogen, which was 50 mg/ml against 2.3 mg/ml of G4(-1). G4(-1) adsorbed onto raw starch granules while G4(-2) did not.
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Affiliation(s)
- T Nakada
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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Fujita M, Torigoe K, Nakada T, Tsusaki K, Kubota M, Sakai S, Tsujisaka Y. Cloning and nucleotide sequence of the gene (amyP) for maltotetraose-forming amylase from Pseudomonas stutzeri MO-19. J Bacteriol 1989; 171:1333-9. [PMID: 2646279 PMCID: PMC209750 DOI: 10.1128/jb.171.3.1333-1339.1989] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The gene (amyP) coding for maltotetraose-forming amylase (exo-maltotetraohydrolase) of Pseudomonas stutzeri MO-19 was cloned. Its nucleotide sequence contained an open reading frame coding for a precursor (547 amino acid residues) of secreted amylase. The precursor had a signal peptide of 21 amino acid residues at its amino terminus. An extract of Escherichia coli carrying the cloned amyP had amylolytic activity with the same mode of action as the extracellular exo-maltotetraohydrolase obtained from P. stutzeri MO-19. A region in the primary structure of this amylase showed homology with those of other amylases of both procaryotic and eucaryotic origins. The minimum 5' noncoding region necessary for the expression of amyP in E. coli was determined, and the sequence of this region was compared with those of Pseudomonas promoters.
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Affiliation(s)
- M Fujita
- Hayashibara Biochemical Laboratories, Inc., Okayama, Japan
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Kubota M, Mikami B, Tsujisaka Y, Morita Y. Crystallization of and preliminary crystallographic data for Bacillus stearothermophilus cyclodextrin glucanotransferase. J Biochem 1988; 104:12-3. [PMID: 2975653 DOI: 10.1093/oxfordjournals.jbchem.a122406] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Cyclodextrin glucanotransferase from Bacillus stearothermophilus TC-91 has been crystallized from an ammonium sulfate solution by the dialysis equilibrium method. The crystals belong to the orthorhombic system, space group P2(1)2(1)2(1), with cell dimensions of a = 125.5 A, b = 88.1 A, and c = 81.5 A. The crystals appear to be suitable for X-ray structure analysis, diffracting to at least 2.1 A and being resistant to radiation damage.
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Affiliation(s)
- M Kubota
- Research Institute for Food Science, Kyoto University
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24
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Shimada Y, Tominaga Y, Iwai M, Tsujisaka Y. Increase in the activity of Rhizopus delemar lipase on water-soluble esters by its binding with phosphatidylcholine. J Biochem 1983; 93:1655-60. [PMID: 6885742 DOI: 10.1093/oxfordjournals.jbchem.a134305] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Rhizopus (Rh.) delemar (ATCC 34612) C-lipase was found to exhibit a slight activity towards water-soluble esters. The hydrolytic reaction of this lipase on alpha-naphthyl acetate was competitively inhibited by the presence of olive oil or Tween 80. This finding showed that both substrates, insoluble triglyceride and water-soluble ester, were hydrolyzed at the same site on the enzyme. The activities on water-soluble esters (alpha-naphthyl acetate, beta-naphthyl acetate, methyl acetylsalicylate and Tween 80) increased on binding of lipase with phosphatidylcholine (PC), although the activity on olive oil did not change. The increase in activity on water-soluble esters was due to the increase in the Vmax for its hydrolysis. It appears that local structural change of the catalytic site on lipase occurred on binding of PC to the lipase molecule and resulted in an increase in the activity on water-soluble esters. The temperature dependence of the hydrolysis of water-soluble esters demonstrated that the activation energy was lowered on binding of PC to the lipase molecule, and this resulted in an increase in the activity.
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Abstract
Lipase from Geotrichum (Geo.) candidum was rapidly inactivated by incubation with water-soluble carbodiimide, 1-ethyl-3-dimethylaminopropyl carbodiimide (EDC), or 1-cyclohexyl-3-(2-morpholinyl-(4)-ethyl) carbodiimide metho-p-toluenesulfonate (CMC), at pH 4.8. The pH dependence of the rate of inactivation was consistent with the modification of carboxyl groups in the lipase. Reaction of the lipase with EDC in the presence of the nucleophile taurine showed that about 9 carboxyl groups per molecule of enzyme were modified with concomitant total loss of activity. This number was reduced to 4 when CMC was used as a carbodiimide instead of EDC. The modification had no effect on the CD spectrum in the ultraviolet region. Kinetic analysis of the effect of CMC on the lipase indicated that at least 1 CMC molecule bound to the enzyme during inactivation.
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Abstract
Rhizopus (Rh.) delemar (ATCC 34612) lipase is modified by its binding with phosphatidylcholine (PC); such binding enhances the lipoprotein lipase (LPL) activity, shifts the isoelectric point (pI) to the acidic side and decreases its alpha-helical content ((1980) J. Biochem. 88, 533-538). The results of density gradient ultracentrifugation proved that PC binding to lipase molecule was depleted by the treatment of PC-bound lipase with 0.3% Triton X-100 and 0.1 M NaCl. By this treatment, LPL activity was decreased almost to the original activity. At the same time, alpha-helical content recovered to that of the original lipase and the isoelectric point recovered from pI 6.5 to nearly the pI of the original lipase. These data indicate that the modification of Rh. lipase by PC is reversible. Furthermore, the results of an experiment with 2-[1(-14) C]oleoyl PC showed that lipase having high LPL activity contained about 5 mol of PC per mol of lipase.
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Abstract
Rhizopus delemar (ATCC 34612) lipase was modified by phospholipid (PL)-treatment so as to enhance its activity on lipoprotein. In order to detect change in lipase conformation in the modified state, a preliminary experiment was performed to remove PL from the PL-treated lipase solution which included PL nonessential to enhancement of lipoprotein lipase (LPL) activity. It was found that treatment with a mixture of isopropyl ether: n-butanol (3 : 1) was suitable for this purpose because of the stability of the enzyme. Changes in isoelectric point and alpha-helical content of lipase caused by PL-treatment were studied by means of isoelectric focusing and circular dichroism spectrum. The isoelectric point of lipase was found to shift to the acidic side on its binding with phosphatidylcholine (PC) or cardiolipin (CL). The circular dichroism spectra of the original lipase and PL-treated lipases indicated that the alpha-helical content of lipase decreased on its binding with PL. In CL-bound lipase, which was more greatly enhanced as to LPL activity than was PC-bound lipase, alpha-helical content was decreased to a larger extent than that of PC-treated lipase.
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Abstract
A lipolytic enzyme which hydrolyzed monoacylglycerols more easily than triacylglycerols was found in the culture broth of Penicillium cyclopium M1. The enzyme was purified to homogeneity and its properties were investigated. Among various substrates used, monoacylglycerols, especially those of medium chain fatty acids, were hydrolyzed very rapidly. Although the rate was low, the enzyme hydrolyzed methyl esters of fatty acids, Span or triacylglycerols of medium chain fatty acids. Based on its substrate specificity, the enzyme was regarded as a partial glyceride hydrolase. When the partial glyceride hydrolase was used in conjunction with lipase on triacylglycerol, the degree of hydrolysis of triacylglycerol became extremely high.
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Hata Y, Matsuura Y, Tanaka N, Kakudo M, Sugihara A, Iwai M, Tsujisaka Y. Low resolution crystal structure of lipase from Geotrichum candidum (ATCC34614). J Biochem 1979; 86:1821-7. [PMID: 575138 DOI: 10.1093/oxfordjournals.jbchem.a132704] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Lipase from Geotrichum candidum (ATCC34614) is a glycerol ester hydrolase which has a molecular weight of 55,000 with about 7% carbohydrate, displaying a high affinity for triolein. The enzyme was crystallized from more than 2% protein solution without using any salt or organic solvent. The crystals were cross-linked by soaking in 0.37% glutaraldehyde solution (0.1 M acetate buffer solution, pH 5.6). The structure was determined by X-ray diffraction using the isomorphous replacement technique. Two heavy-atom derivatives [K2PtCl4 and UO2(CH3COO)2] were obtained by the soaking method. The electron density map calculated at 5 A resolution clearly showed the molecular boundary. A balsa wood model was made on the basis of the 6 A electron density map. The molecular has an ellipsoidal shape with dimensions of 70 A X 50 A X 50 A. Several columns of density corresponding to alpha-helix and a few clefts were found in the molecule. The active site is presumably located in the vicinity of one of the Pt sites in the Pt-derivative crystal, judging from the inactivation of the enzyme by K2PtCl4.
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Okumura S, Iwai M, Tsujisaka Y. Synthesis of various kinds of esters by four microbial lipases. Biochim Biophys Acta 1979; 575:156-65. [PMID: 508776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ester synthesis by microbial lipases, using homogeneous enzyme preparations, were investigated. The amount of synthesized ester was estimated by alkalimetry, and products were identified by thin-layer chromatography and infrared spectroscopy. Lipases from Aspergillus niger, Rhizopus delemar, Geotrichum candidum and Penicillium cyclopium synthesized esters from oleic acid and various primary alcohols. Only Geotrichum candidum lipase synthesized esters of secondary alcohols. Esters of tertiary alcohols, phenols or sugar alcohols were not synthesized by any lipase. Rather high concentrations of alcohol were required to synthesize the esters of ethylene glycol, propylene glycol or trimethylene glycol. Lipases from Aspergillus niger and Rhizopus delemar synthesized oleyl esters of various fatty acids and some dibasic acids. In contrast, lipases from Geotrichum candidum and Penicillium cyclopium synthesized oleyl esters only from medium or long chain fatty acids.
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Tsujisaka Y. [Nursing report. Observation on the family relationship as part of nursing actions]. Kango Tenbo 1979; 4:137-43. [PMID: 253845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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33
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Tsujisaka Y, Okumura S, Iwai M. Glyceride synthesis by four kinds of microbial lipase. Biochim Biophys Acta 1977; 489:415-22. [PMID: 563245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Apart from their usual mechanism of action, lipases from Aspergillus niger and Rhizopus delemar also catalyzed the synthesis of glycerides from oleic acid and glycerol. Lipases from Geotrichum candidum and Penicillium cyclopium were inactivated by oleic acid, but were stable in the presence of casein, albumin or buffer of appropriate pH. Lipases from Aspergillus niger and Rhizopus delemar synthesized glycerides from, not only fatty acid, but dibasic acids and aromatic acids, making ester bonds only at position 1 and 3 of glycerol. In contrast, lipases from Geotricum candidum and Penicillium cyclopium synthesized glycerides only from long chain fatty acids, and made ester bonds at all three available positions of the glycerol molecule.
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Watanabe Y, Hamada N, Morita M, Tsujisaka Y. Purification and properties of a polyvinyl alcohol-degrading enzyme produced by a strain of Pseudomonas. Arch Biochem Biophys 1976; 174:575-81. [PMID: 820265 DOI: 10.1016/0003-9861(76)90386-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Sugihara A, Tsujisaka Y, Iwai M, Tominaga Y, Okumura S, Matsuura Y, Tanaka N, Kakudo M. Crystallographic data and circular dichroism spectrum of lipase from Geotrichum candidum link. J Mol Biol 1975; 99:807-8. [PMID: 1240147 DOI: 10.1016/s0022-2836(75)80186-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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36
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Tominaga Y, Tsujisaka Y. Purification and some enzymatic properties of the chitosanase from Bacillus R-4 which lyses Rhizopus cell walls. Biochim Biophys Acta 1975; 410:145-55. [PMID: 69 DOI: 10.1016/0005-2744(75)90215-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A strain of Bacillus sp (Bacillus R-4) produces a protease and a carbohydrolase both of which have the ability to lyse Rhizopus cell walls. Of the enzymes, the carbohydrolase has been purified to an ultracentrifugally and electrophoretically homogeneous state, and identified as a chitosanase. The enzyme was active on glycol chitosan as well as chitosan. Molecular weight of the purified enzyme was estimated as 31 000 and isoelectric point as pH 8.30. The enzyme was most active at pH 5.6 and at 40 degrees C with either Rhizopus cell wall or glycol chitosan as substrate, and was stable over a range of pH 4.5 to 7.5 at 40 degrees C for 3 h. The activity was lost by sulfhydryl reagents and restored by either reduced glutathione of L-cysteine. An abrupt decrease in viscosity of the reaction mixture suggested an endowise cleavage of chitosan by this enzyme.
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Takenishi S, Tsujisaka Y, Fukumoto J. Studies on hemicellulases. IV. Purification and properties of the -xylosidase produced by Aspergillus niger van Tieghem. J Biochem 1973; 73:335-43. [PMID: 4709621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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