1
|
Shankar V, Shirakawa N, Ishihara D. Novel Computational Design of Polymer Micromachined Insect-Mimetic Wings for Flapping-Wing Nano Air Vehicles. Biomimetics (Basel) 2024; 9:133. [PMID: 38534818 DOI: 10.3390/biomimetics9030133] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 02/18/2024] [Accepted: 02/20/2024] [Indexed: 03/28/2024] Open
Abstract
The flapping wings of insects undergo large deformations caused by aerodynamic forces, resulting in cambering. Insect-mimetic micro wings for flapping-wing nano air vehicles mimic these characteristic deformations. In this study, a 2.5-dimensional insect-mimetic micro wing model for flapping-wing nano air vehicles is proposed to realize this type of wing. The proposed model includes a wing membrane, a leading edge, a center vein, and a root vein, all of which are modeled as shell elements. The proposed wing is a 2.5-dimensional structure and can thus be fabricated using polymer micromachining. We conducted a design window search to demonstrate the capabilities of the wing. The design windows, which are areas of desirable design solutions in the design parameter space, are iteratively searched using nonlinear finite-element analysis under quasi-steady aerodynamic modeling. Here, thickness is selected as a design parameter. The properties of real insects, polymer materials, and fabrication conditions are used to determine the other parameters. A fabricable design solution that generates sufficient camber is found from the design windows.
Collapse
Affiliation(s)
- Vinay Shankar
- Department of Intelligent and Control Systems, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 8208502, Fukuoka, Japan
| | - Nagi Shirakawa
- Department of Intelligent and Control Systems, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 8208502, Fukuoka, Japan
| | - Daisuke Ishihara
- Department of Intelligent and Control Systems, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 8208502, Fukuoka, Japan
| |
Collapse
|
2
|
Hatakeyama K, Kikushige Y, Ishihara D, Yamamoto S, Kawano G, Tochigi T, Miyamoto T, Sakoda T, Christoforou A, Kunisaki Y, Fukata M, Kato K, Ito T, Handa H, Akashi K. Thrombospondin-1 is an endogenous substrate of cereblon responsible for immunomodulatory drug-induced thromboembolism. Blood Adv 2024; 8:785-796. [PMID: 38163319 PMCID: PMC10847748 DOI: 10.1182/bloodadvances.2023010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 11/30/2023] [Accepted: 11/30/2023] [Indexed: 01/03/2024] Open
Abstract
ABSTRACT Immunomodulatory drugs (IMiDs) are key drugs for treating multiple myeloma and myelodysplastic syndrome with chromosome 5q deletion. IMiDs exert their pleiotropic effects through the interaction between cell-specific substrates and cereblon, a substrate receptor of the E3 ubiquitin ligase complex. Thus, identification of cell-specific substrates is important for understanding the effects of IMiDs. IMiDs increase the risk of thromboembolism, which sometimes results in fatal clinical outcomes. In this study, we sought to clarify the molecular mechanisms underlying IMiDs-induced thrombosis. We investigated cereblon substrates in human megakaryocytes using liquid chromatography-mass spectrometry and found that thrombospondin-1 (THBS-1), which is an inhibitor of a disintegrin-like and metalloproteinase with thrombospondin type 1 motifs 13, functions as an endogenous substrate in human megakaryocytes. IMiDs inhibited the proteasomal degradation of THBS-1 by impairing the recruitment of cereblon to THBS-1, leading to aberrant accumulation of THBS-1. We observed a significant increase in THBS-1 in peripheral blood mononuclear cells as well as larger von Willebrand factor multimers in the plasma of patients with myeloma, who were treated with IMiDs. These results collectively suggest that THBS-1 represents an endogenous substrate of cereblon. This pairing is disrupted by IMiDs, and the aberrant accumulation of THBS-1 plays an important role in the pathogenesis of IMiDs-induced thromboembolism.
Collapse
Affiliation(s)
- Kiwamu Hatakeyama
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
| | - Yoshikane Kikushige
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Daisuke Ishihara
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Shunsuke Yamamoto
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Gentaro Kawano
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Taro Tochigi
- Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Japan
| | - Toshihiro Miyamoto
- Haematology/Respiratory Medicine, Faculty of Medicine, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University Hospital, Ishikawa, Japan
| | - Teppei Sakoda
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | | | - Yuya Kunisaki
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Mitsuhiro Fukata
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
| | - Koji Kato
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
| | - Takumi Ito
- Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
| | - Hiroshi Handa
- Center for Future Medical Research Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
| | - Koichi Akashi
- Department of Medicine and Biosystemic Sciences, Kyushu University Graduate School of Medicine, Fukuoka, Japan
| |
Collapse
|
3
|
Ishihara D, Onishi M, Sugikawa K. Vein-Membrane Interaction in Cambering of Flapping Insect Wings. Biomimetics (Basel) 2023; 8:571. [PMID: 38132510 PMCID: PMC10741490 DOI: 10.3390/biomimetics8080571] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/20/2023] [Accepted: 11/24/2023] [Indexed: 12/23/2023] Open
Abstract
It is still unclear how elastic deformation of flapping insect wings caused by the aerodynamic pressure results in their significant cambering. In this study, we present that a vein-membrane interaction (VMI) can clarify this mechanical process. In order to investigate the VMI, we propose a numerical method that consists of (a) a shape simplification model wing that consists of a few beams and a rectangular shell structure as the structural essence of flapping insect wings for the VMI, and (b) a monolithic solution procedure for strongly coupled beam and shell structures with large deformation and large rotation to analyze the shape simplification model wing. We incorporate data from actual insects into the proposed numerical method for the VMI. In the numerical analysis, we demonstrate that the model wing can generate a camber equivalent to that of the actual insects. Hence, the VMI will be a mechanical basis of the cambering of flapping insect wings. Furthermore, we present the mechanical roles of the veins in cambering. The intermediate veins increase the out-of-plane deflection of the wing membrane due to the aerodynamic pressure in the central area of the wing, while they decrease it in the vicinity of the trailing edge. As a result, these veins create the significant camber. The torsional flexibility of the leading-edge veins increases the magnitude of cambering.
Collapse
Affiliation(s)
- Daisuke Ishihara
- Department of Intelligent and Control Systems, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 820-8502, Fukuoka, Japan; (M.O.); (K.S.)
| | | | | |
Collapse
|
4
|
Vaynerman A, Coombs L, Nickols H, LaRocca R, Sinicrope K, Ishihara D, Spalding A, Sun D. SURG-06. MANAGEMENT OF HYDROCEPHALUS IN ADULT PATIENTS WITH BRAIN METASTASES. Neuro Oncol 2020. [DOI: 10.1093/neuonc/noaa215.853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
BACKGROUND
Traditionally patients presenting with hydrocephalus in the setting of brain metastases were associated with poor outcomes. However, in the area of improved systemic therapies, the prognosis of brain metastases has improved, warranting investigation into the management of concomitant hydrocephalus.
METHODS
We conducted a retrospective review of 12 consecutive patients with brain metastases presenting with hydrocephalus treated with either endoscopic third ventriculostomy (ETV) or ventriculoperitoneal shunt (VPS) from June 2013 to December 2018. We then compared our outcomes to 77 historical controls from the literature to test the hypothesis that management of hydrocephalus in patients who respond to systemic therapy is associated with improved outcomes.
RESULTS
The medial overall survival in our cohort was 182 days compared with 91 days in the reported previous studies, with an odds ratio of 0.5 (95% CI 0.24-1.04). In the 5 patients who underwent ETV, the median survival was 182 days versus 77 days reported in the literature, an odds ratio of 0.42 (95% CI 1.28-1.40). Patients with one brain metastasis did not reach median survival with 4 of 5 patients alive at last follow up, while only 3 of 7 patients with at least two metastases were alive at follow up with a median survival of 182 days. Patients who had immunotherapy were associated with improved survival, while leptomeningeal carcinomatosis still was associated with a negative outcome.
CONCLUSIONS
Patients with brain metastases and hydrocephalus who underwent neurosurgical CSF diversion had improved survival compared with historical controls, particularly in patients with one metastasis or who received immunotherapy. This study supports initial interdisciplinary evaluation of patients with brain metastases by medical and radiation oncology together with neurosurgery to facilitate immediate systemic therapy after relief of hydrocephalus.
Collapse
Affiliation(s)
- A Vaynerman
- Norton Cancer Institute, Louisville, KY, USA
| | - L Coombs
- Norton Cancer Institute, Louisville, KY, USA
| | - H Nickols
- Norton Cancer Institute, Louisville, KY, USA
| | - R LaRocca
- Norton Cancer Institute, Louisville, KY, USA
| | - K Sinicrope
- Norton Cancer Institute, Louisville, KY, USA
| | - D Ishihara
- Norton Cancer Institute, Louisville, KY, USA
| | - A Spalding
- Norton Cancer Institute, Louisville, KY, USA
| | - D Sun
- Norton Cancer Institute, Louisville, KY, USA
| |
Collapse
|
5
|
Suzuki T, Eguchi S, Ishihara D. 6120Anatomical investigation of the sinus node artery and the radiofrequency application sites for catheter ablation of atrial fibrillation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0146] [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
Circumferential pulmonary vein isolation is an established therapy for selected patients with atrial fibrillation (AF). Three-dimensional imaging modalities can be useful to establish the mechanism of a procedure-related complication.
Purpose
The purpose of this study was to investigate the course of the sinus node artery (SNA) and the coronary arterial injury during catheter ablation of AF.
Methods
In the 254 consecutive patients, the courses of the SNA were recorded using multislice computed tomography.
Results
The visualization rate was 96.9% (246/254). Of 246 patients, 287 SNAs were detected among which 114 (44.9%) originated from the right coronary artery, 91 (35.9%) from the left circumflex (Cx) artery, and 41 (16.1%) from both the right and Cx artery. Only SNAs originated from the Cx artery coursed along the left atrium. Only in 2 patients, SNAs coursed endocardial surface of the left atrium. In one of these 2 patients, sinus node dysfunction developed just after the ablation of the right superior pulmonary vein ostium, requiring a permanent pacemaker implantation. The SNA originated from the distal Cx artery, and precisely coursed endocardial surface at the radiofrequency application site. Coronary angiography revealed the occlusion of the SNA at that site, and the SNA occlusion was presumed the cause of the sinus node dysfunction in this patient.
Conclusion
The recognition of the course of the SNA is important in minimizing the risk of sinus node dysfunction during catheter ablation of AF.
Collapse
Affiliation(s)
- T Suzuki
- Inazawa Municipal Hospital, Department of Cardiology, Inazawa, Japan
| | - S Eguchi
- Inazawa Municipal Hospital, Department of Cardiology, Inazawa, Japan
| | - D Ishihara
- Inazawa Municipal Hospital, Department of Cardiology, Inazawa, Japan
| |
Collapse
|
6
|
Aoki T, Kamimura T, Yoshida S, Mori Y, Kadowaki M, Kohno K, Ishihara D, Urata S, Sugio T, Kamezaki K, Kato K, Ito Y, Eto T, Akashi K, Miyamoto T. Safety and Seropositivity after Live Attenuated Vaccine in Adult Patients Receiving Hematopoietic Stem Cell Transplantation. Biol Blood Marrow Transplant 2019; 25:1576-1585. [DOI: 10.1016/j.bbmt.2019.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 03/25/2019] [Accepted: 04/01/2019] [Indexed: 10/27/2022]
|
7
|
Minami M, Matsushima T, Mori Y, Ishihara D, Jinnnouchi F, Takenaka K, Henzan T, Yoshimoto G, Numata A, Kato K, Maeda T, Miyamoto T, Akashi K. Successful rescue transplantation with desensitization procedure after primary graft failure due to donor-specific antibody. Bone Marrow Transplant 2019; 54:1374-1376. [PMID: 30804490 DOI: 10.1038/s41409-019-0486-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/27/2019] [Accepted: 02/01/2019] [Indexed: 01/15/2023]
Affiliation(s)
- Mariko Minami
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Takumi Matsushima
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Yasuo Mori
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan.
| | - Daisuke Ishihara
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Fumiaki Jinnnouchi
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Katsuto Takenaka
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Tomoko Henzan
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Goichi Yoshimoto
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Akihiko Numata
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Koji Kato
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Takahiro Maeda
- Center for Cellular and Molecular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Toshihiro Miyamoto
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| | - Koichi Akashi
- Department of Medicine and Biosystemic Science, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan
| |
Collapse
|
8
|
Aoki T, Urata S, Ishihara D, Umeno T, Kamimura T. [Recurring Sweet syndrome in a patient with Philadelphia chromosome-positive acute lymphoblastic leukemia]. Rinsho Ketsueki 2019; 60:565-569. [PMID: 31281145 DOI: 10.11406/rinketsu.60.565] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Sweet syndrome is a rare inflammatory disease with rapid onset of painful, edematous skin eruptions, and neutrophilia. Concerning hematological disorders, Sweet syndrome often presents in patients with myeloid diseases, but it is rarely observed in patients with lymphoid diseases. Here we describe a 72-year-old male with Philadelphia chromosome-positive acute lymphoblastic leukemia who suffered recurring Sweet syndrome. Following induction chemotherapy, granulocyte colony-stimulating factors (G-CSFs) were administered due to febrile neutropenia. A few weeks thereafter, skin eruption emerged on the palmar and dorsal surfaces of his hands, and skin biopsy confirmed Sweet syndrome. His symptoms improved with the short-term use of prednisolone. After recovering from the neutropenia, the patient received percutaneous coronary intervention (PCI) due to unstable angina that developed after the induction chemotherapy. During PCI, coronary artery dissection caused cardiopulmonary arrest. The patient recovered with intensive care. However, blood tests on the following day revealed marked neutrophilia. The skin eruption re-emerged on both hands, which was consistent with Sweet syndrome. Sweet syndrome repeatedly occurred after the recovery of neutropenia due to chemotherapy. We suggest that the intrinsic increase in G-CSF in response to inflammation might have caused recurring Sweet syndrome in this patient.
Collapse
|
9
|
Suzuki T, Kobayashi H, Ishihara D, Kobayashi S. P1810Premature ventricular contractions originating from the left ventricle underneath the membranous septum: new insights into the electrophysiological characteristics and mechanisms. Europace 2017. [DOI: 10.1093/ehjci/eux161.119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
10
|
Abstract
The high torsional flexibility of insect wings allows for elastic recoil after the rotation of the wing during stroke reversal. However, the underlying mechanism of this recoil remains unclear because of the dynamic process of transitioning from the wing rotation during stroke reversal to the maintenance of a high angle of attack during the middle of each half-stroke, when the inertial, elastic, and aerodynamic effects all have a significant impact. Therefore, the interaction between the flapping wing and the surrounding air was directly simulated by simultaneously solving the incompressible Navier-Stokes equations, the equation of motion for an elastic body, and the fluid-structure interface conditions using the three-dimensional finite element method. This direct numerical simulation controlling the aerodynamic effect revealed that the recoil is the residual of the free pitch vibration induced by the flapping acceleration during stroke reversal in the transient response very close to critical damping due to the dynamic pressure resistance of the surrounding air. This understanding will enable the control of the leading-edge vortex and lift generation, the reduction of the work performed by flapping wings, and the interpretation of the underlying necessity for the kinematic characteristics of the flapping motion.
Collapse
|
11
|
Ishihara D, Louder K, Akter M, Ahn C, Margulis V, Arriaga Y, Courtney K, Timmerman R, Brugarolas J, Hannan R. Phase 2 Trial of High-Dose Interleukin-2 (IL-2) and Stereotactic Ablative Radiation Therapy (SABR) for Metastatic Clear Cell Renal Cell Carcinoma (mRCC)—Interim Analysis of i-SAbR IL-2 Trial. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.241] [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: 11/30/2022]
|
12
|
Tsujimoto Y, Saito R, Furuya H, Ishihara D, Sahara T, Kimura N, Nishino T, Tsuruoka N, Shigeri Y, Watanabe K. Caenibacillus caldisaponilyticus gen. nov., sp. nov., a thermophilic, spore-forming and phospholipid-degrading bacterium isolated from acidulocompost. Int J Syst Evol Microbiol 2016; 66:2684-2690. [PMID: 27117268 DOI: 10.1099/ijsem.0.001108] [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] [Indexed: 11/18/2022] Open
Abstract
A thermophilic and phospholipid-degrading bacterium, designated strain B157T, was isolated from acidulocompost, a garbage compost processed under acidic conditions at moderately high temperature. The organism was Gram-stain-positive, aerobic, spore-forming and rod-shaped. Growth was observed to occur at 40-65 °C and pH 4.8-8.1 (optimum growth: 50-60 °C, pH 6.2). The strain was catalase- and oxidase-positive. The cell wall contained meso-diaminopimelic acid, alanine, glutamic acid and galactose. The predominant respiratory quinone was menaquinone-7 (MK-7) and the major fatty acids were anteiso-C17 : 0 and iso-C17 : 0. Comparative 16S rRNA gene sequence analysis showed that strain B157T was related most closely to Tuberibacillus calidus 607T (94.8 % identity), and the phylogenetic analysis revealed that it belonged to the family Sporolactobacillaceae. The DNA G+C content was determined as 51.8 mol%. In spite of many similarities with the type strains of members of the family Sporolactobacillaceae, genotypic analyses suggest that strain B157T represents a novel species of a new genus, Caenibacilluscaldisaponilyticus gen. nov., sp. nov. The type strain of Caenibacilluscaldisaponilyticus is B157T (=NBRC 111400T=DSM 101100T).
Collapse
Affiliation(s)
- Yoshiyuki Tsujimoto
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522, Japan
| | - Ryo Saito
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522, Japan
| | - Hiroto Furuya
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522, Japan
| | - Daisuke Ishihara
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522, Japan
| | - Takehiko Sahara
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Nobutada Kimura
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Tokuzo Nishino
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Aramaki, Aoba, Sendai, Miyagi 980-8579, Japan
| | - Naoki Tsuruoka
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Yasushi Shigeri
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan
| | - Kunihiko Watanabe
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522, Japan
| |
Collapse
|
13
|
Ishihara D, Sun J, Li J, Wei Q, Tsubaki N. Expanding Small Pore Size of the Bimodal Catalyst with Surfactant and Its Application in Slurry-phase Fischer-Tropsch Synthesis. ChemistrySelect 2016. [DOI: 10.1002/slct.201600199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Daisuke Ishihara
- R&D - Core Technology; Material Science Research, Kao Co., Ltd.; 1334 Minato, Wakayama-shi Wakayama 640-8580 Japan
| | - Jian Sun
- Dalian National Laboratory for Clean Energy (DNL); Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023 P.R. China
| | - Jie Li
- Department of Applied Chemistry, School of Engineering; University of Toyama; Gofuku 3190 Toyama Japan
| | - Qinhong Wei
- Department of Applied Chemistry, School of Engineering; University of Toyama; Gofuku 3190 Toyama Japan
| | - Noritatsu Tsubaki
- Department of Applied Chemistry, School of Engineering; University of Toyama; Gofuku 3190 Toyama Japan
| |
Collapse
|
14
|
Ishihara D, Horie T, Niho T. An experimental and three-dimensional computational study on the aerodynamic contribution to the passive pitching motion of flapping wings in hovering flies. Bioinspir Biomim 2014; 9:046009. [PMID: 25378268 DOI: 10.1088/1748-3182/9/4/046009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The relative importance of the wing's inertial and aerodynamic forces is the key to revealing how the kinematical characteristics of the passive pitching motion of insect flapping wings are generated, which is still unclear irrespective of its importance in the design of insect-like micro air vehicles. Therefore, we investigate three species of flies in order to reveal this, using a novel fluid-structure interaction analysis that consists of a dynamically scaled experiment and a three-dimensional finite element analysis. In the experiment, the dynamic similarity between the lumped torsional flexibility model as a first approximation of the dipteran wing and the actual insect is measured by the Reynolds number Re, the Strouhal number St, the mass ratio M, and the Cauchy number Ch. In the computation, the three-dimension is important in order to simulate the stable leading edge vortex and lift force in the present Re regime over 254. The drawback of the present experiment is the difficulty in satisfying the condition of M due to the limitation of available solid materials. The novelty of the present analysis is to complement this drawback using the computation. We analyze the following two cases: (a) The equilibrium between the wing's elastic and fluid forces is dynamically similar to that of the actual insect, while the wing's inertial force can be ignored. (b) All forces are dynamically similar to those of the actual insect. From the comparison between the results of cases (a) and (b), we evaluate the contributions of the equilibrium between the aerodynamic and the wing's elastic forces and the wing's inertial force to the passive pitching motion as 80-90% and 10-20%, respectively. It follows from these results that the dipteran passive pitching motion will be based on the equilibrium between the wing's elastic and aerodynamic forces, while it will be enhanced by the wing's inertial force.
Collapse
Affiliation(s)
- D Ishihara
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka, Japan
| | | | | |
Collapse
|
15
|
Nishida H, Ishihara D, Ishii M, Kaneko T, Kawahigashi H, Akashi Y, Saisho D, Tanaka K, Handa H, Takeda K, Kato K. Phytochrome C is a key factor controlling long-day flowering in barley. Plant Physiol 2013; 163:804-14. [PMID: 24014575 PMCID: PMC3793059 DOI: 10.1104/pp.113.222570] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 09/02/2013] [Indexed: 05/18/2023]
Abstract
The spring-type near isogenic line (NIL) of the winter-type barley (Hordeum vulgare ssp. vulgare) var. Hayakiso 2 (HK2) was developed by introducing VERNALIZATION-H1 (Vrn-H1) for spring growth habit from the spring-type var. Indo Omugi. Contrary to expectations, the spring-type NIL flowered later than winter-type HK2. This phenotypic difference was controlled by a single gene, which cosegregated only with phytochrome C (HvPhyC) among three candidates around the Vrn-H1 region (Vrn-H1, HvPhyC, and CASEIN KINASE IIα), indicating that HvPhyC was the most likely candidate gene. Compared with the late-flowering allele HvPhyC-l from the NIL, the early-flowering allele HvPhyC-e from HK2 had a single nucleotide polymorphism T1139C in exon 1, which caused a nonsynonymous amino acid substitution of phenylalanine at position 380 by serine in the functionally essential GAF (3', 5'-cyclic-GMP phosphodiesterase, adenylate cyclase, formate hydrogen lyase activator protein) domain. Functional assay using a rice (Oryza sativa) phyA phyC double mutant line showed that both of the HvPhyC alleles are functional, but HvPhyC-e may have a hyperfunction. Expression analysis using NILs carrying HvPhyC-e and HvPhyC-l (NIL [HvPhyC-e] and NIL [HvPhyC-l], respectively) showed that HvPhyC-e up-regulated only the flowering promoter FLOWERING LOCUS T1 by bypassing the circadian clock genes and flowering integrator CONSTANS1 under a long photoperiod. Consistent with the up-regulation, NIL (HvPhyC-e) flowered earlier than NIL (HvPhyC-l) under long photoperiods. These results implied that HvPhyC is a key factor to control long-day flowering directly.
Collapse
Affiliation(s)
- Hidetaka Nishida
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Daisuke Ishihara
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Makoto Ishii
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Takuma Kaneko
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Hiroyuki Kawahigashi
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Yukari Akashi
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Daisuke Saisho
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Katsunori Tanaka
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Hirokazu Handa
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | - Kazuyoshi Takeda
- Graduate School of Environmental and Life Science, Okayama University, Okayama 700–8530, Japan (H.N., D.I., T.K., Y.A., K.K.)
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710–0046, Japan (M.I., D.S., K.Tak.)
- National Institute of Agrobiological Sciences, Tsukuba 305–8602, Japan (H.K., H.H.); and
- Faculty of Humanities, Hirosaki University, Hirosaki 036–8560, Japan (K.Tan.)
| | | |
Collapse
|
16
|
Mourad W, Shourbaji R, Ishihara D, Lin W, Hu K, Harrison L. The Impact of Computed Tomography on Early Glottic Cancer Outcomes. Pract Radiat Oncol 2013; 3:S33. [DOI: 10.1016/j.prro.2013.01.111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
17
|
Maetani S, Fukuyama T, Suzuki N, Ishihara D, Ryu I. Iron-catalyzed decarbonylation reaction of aliphatic carboxylic acids leading to α-olefins. Chem Commun (Camb) 2012; 48:2552-4. [DOI: 10.1039/c2cc18093f] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Kaneda H, Onaka T, Sakon I, Ishihara D, Mouri A, Yamagishi M, Yasuda A. PAH evolution in the harsh environment of the ISM. ACTA ACUST UNITED AC 2011. [DOI: 10.1051/eas/1146017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
19
|
Maetani S, Fukuyama T, Suzuki N, Ishihara D, Ryu I. Efficient Iridium-Catalyzed Decarbonylation Reaction of Aliphatic Carboxylic Acids Leading to Internal or Terminal Alkenes. Organometallics 2011. [DOI: 10.1021/om1009268] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shinji Maetani
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahide Fukuyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | | | - Daisuke Ishihara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Kao Corporation, Wakayama, Wakayama 640-8580, Japan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| |
Collapse
|
20
|
Matsubara H, Ryu I, Tsukida M, Ishihara D, Kuniyoshi K. A Photoirradiative Phase-Vanishing Method: Efficient Generation of HBr from Alkanes and Molecular Bromine and Its Use for Subsequent Radical Addition to Terminal Alkenes. Synlett 2010. [DOI: 10.1055/s-0030-1258482] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
21
|
Ishihara D, Yamashita Y, Horie T, Yoshida S, Niho T. Passive maintenance of high angle of attack and its lift generation during flapping translation in crane fly wing. J Exp Biol 2009; 212:3882-91. [DOI: 10.1242/jeb.030684] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARYWe have studied the passive maintenance of high angle of attack and its lift generation during the crane fly's flapping translation using a dynamically scaled model. Since the wing and the surrounding fluid interact with each other, the dynamic similarity between the model flight and actual insect flight was measured using not only the non-dimensional numbers for the fluid (the Reynolds and Strouhal numbers) but also those for the fluid—structure interaction (the mass and Cauchy numbers). A difference was observed between the mass number of the model and that of the actual insect because of the limitation of available solid materials. However, the dynamic similarity during the flapping translation was not much affected by the mass number since the inertial force during the flapping translation is not dominant because of the small acceleration. In our model flight, a high angle of attack of the wing was maintained passively during the flapping translation and the wing generated sufficient lift force to support the insect weight. The mechanism of the maintenance is the equilibrium between the elastic reaction force resulting from the wing torsion and the fluid dynamic pressure. Our model wing rotated quickly at the stroke reversal in spite of the reduced inertial effect of the wing mass compared with that of the actual insect. This result could be explained by the added mass from the surrounding fluid. Our results suggest that the pitching motion can be passive in the crane fly's flapping flight.
Collapse
Affiliation(s)
- D. Ishihara
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka, Japan
| | - Y. Yamashita
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka, Japan
| | - T. Horie
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka, Japan
| | - S. Yoshida
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka, Japan
| | - T. Niho
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka, Japan
| |
Collapse
|
22
|
Ishihara D, Horie T, Denda M. A two-dimensional computational study on the fluid–structure interaction cause of wing pitch changes in dipteran flapping flight. J Exp Biol 2009; 212:1-10. [DOI: 10.1242/jeb.020404] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARYIn this study, the passive pitching due to wing torsional flexibility and its lift generation in dipteran flight were investigated using (a) the non-linear finite element method for the fluid–structure interaction,which analyzes the precise motions of the passive pitching of the wing interacting with the surrounding fluid flow, (b) the fluid–structure interaction similarity law, which characterizes insect flight, (c) the lumped torsional flexibility model as a simplified dipteran wing, and (d) the analytical wing model, which explains the characteristics of the passive pitching motion in the simulation. Given sinusoidal flapping with a frequency below the natural frequency of the wing torsion, the resulting passive pitching in the steady state, under fluid damping, is approximately sinusoidal with the advanced phase shift. We demonstrate that the generated lift can support the weight of some Diptera.
Collapse
Affiliation(s)
- Daisuke Ishihara
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka 8208502,Japan
| | - T. Horie
- Kyushu Institute of Technology, 680-4 Kawazu, Iizuka, Fukuoka 8208502,Japan
| | - Mitsunori Denda
- Rutgers University, 98 Brett Road, Piscataway, NJ 08854-8058, USA
| |
Collapse
|
23
|
Guha SK, Obora Y, Ishihara D, Matsubara H, Ryu I, Ishii Y. Aerobic Oxidation of Cyclohexane usingN-Hydroxyphthalimide Bearing Fluoroalkyl Chains. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800057] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
24
|
Sawada T, Hirai M, Akahoshi M, Inden Y, Yoshida Y, Ishihara D, Yamada K, Takada Y, Tanaka T, Takada Y, Kondo T, Murohara T. Ventricular activation and recovery measured in electrocardiographic limb leads correlate with measurements from specific areas in body surface mapping. Europace 2002; 4:401-10. [PMID: 12408260 DOI: 10.1053/eupc.2002.0255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIMS Dispersion of ventricular depolarization-repolarization in 12-lead electrocardiograms (ECGs) has been reported to provide noninvasive information on arrhythmogenicity. However, there are two methods to calculate the dispersion from ECGs including and excluding limb leads. The aim of this study was to examine whether temporal parameters from limb leads represent activation and repolarization of a particular part of the body surface. METHODS AND RESULTS We compared the temporal parameters of activation time (AT), activation-recovery interval (ARI), and recovery time (RT) from limb leads of ECGs with those from an 87-lead body surface maps. The study population consisted of 50 normal subjects (25 men and 25 women, 19.4 +/- 1.6 years). The temporal parameters in leads I, II, and III were highly (r > 0.9) correlated with those in unipolar leads over the left lateral, left lower, and right lower chest, respectively. The temporal parameters in leads aVR, aVL, and aVF showed a significant correlation (r > 0.8) with those in unipolar leads over the right upper, left upper, and lower anterior chest, respectively. The mean AT, ARI, and RT from each limb lead of ECG were almost the same as those of unipolar leads over the corresponding areas of the body surface. CONCLUSIONS These findings suggest that ATs, ARIs, and RTs from limb leads may represent those from unipolar leads of particular areas over the body surface in normal subjects. The temporal parameters from limb leads of ECGs may provide information on activation and repolarization as well as the precordial leads of ECGs.
Collapse
Affiliation(s)
- T Sawada
- First Department of Internal Medicine, Nagoya University, School of Medicine, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Sato N, Okamoto S, Mori T, Watanabe R, Hamano Y, Kawamura J, Ishihara D, Ikeda Y. Recurrent acute myositis after allogeneic bone marrow transplantation for myelodysplasia. Hematology 2002; 7:109-12. [PMID: 12186701 DOI: 10.1080/10245330290022115] [Citation(s) in RCA: 14] [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: 10/28/2022] Open
Abstract
A 54-year-old woman developed polymyositis 6 months after allogeneic bone marrow transplantation (BMT) for acute myelogenous leukemia transformed from myelodysplasia. At the onset of myositis, the patient had oral dryness, and the histology of oral mucosa was compatible with chronic graft-versus-host disease (GVHD). Muscle biopsy revealed focal muscle necrosis with massive lymphocytic infiltration. She was diagnosed with polymyositis, and the dose of cyclosporine was increased. Three months later, a complete resolution of myositis had been obtained, and the cyclosporine was tapered off. However, 51 months after the first episode of myositis, she again noted severe myalgia and was diagnosed with a recurrence of polymyositis based on high serum creatinine kinase (CK) and the findings of magnetic resonance imaging (MRI). At that time, chronic GVHD in other organs was not present. She achieved a second remission of polymyositis with cyclosporine, and has remained in remission for 4 years. The pathogenesis of myositis can be attributed to the immunologic imbalance characteristic of the post-allogeneic BMT setting.
Collapse
Affiliation(s)
- N Sato
- Keio Bone Marrow Transplant Program, Division of Hematology, Department of Medicine, School of Medicine, Keio University, 35-Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Suzuki Y, Ishihara D, Sasaki M, Nakagawa H, Hata H, Tsunoda T, Watanabe M, Komatsu T, Ota T, Isogai T, Suyama A, Sugano S. Statistical analysis of the 5' untranslated region of human mRNA using "Oligo-Capped" cDNA libraries. Genomics 2000; 64:286-97. [PMID: 10756096 DOI: 10.1006/geno.2000.6076] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.7] [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: 11/22/2022]
Abstract
We constructed 34 types of human "full-length enriched" and "5'-end enriched" cDNA libraries based on the "Oligo-Capping" method. We randomly picked and sequenced 10,000 clones from these libraries. BLAST analysis showed that about 50% of the cDNAs were identical to known genes. Among them, we selected 954 species of cDNA that should represent the entire sequence from the mRNA start sites. Compared with previously reported sequences, they were on average 45 bp longer in the 5'-end. Using these cDNA data, we statistically analyzed the sequence features of the 5'UTR. The average length of the 5'UTR was 125 bp, and there was little correlation with the corresponding mRNA length (correlation coefficient = 0.26). Of the 954 species of 5'UTR, 459 contained no in-frame terminator codon, which is against the common belief. Two hundred seventy-eight species contained at least one ATG codon upstream of the initiator ATG codon. We identified 569 upstream ATGs, in total, 63% of which adequately satisfied Kozak's criteria. These findings are contrary to the typical translation initiation model, which states that translation is initiated from the "first" ATG codon.
Collapse
Affiliation(s)
- Y Suzuki
- Department of Virology, Institute of Medical Science, University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Matsumoto A, Ishihara D, Nishizawa K, Aota H, Takayama Y, Kameyama A, Nakanishi T. Specific Polymerization Behavior of Triallyl Isocyanurate. Accumulation of Radicals before Gelation. Polym J 2000. [DOI: 10.1295/polymj.32.79] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
28
|
Hiramine Y, Ichinose Y, Torii Y, Yonemaru M, Toyama K, Ishihara D, Takasugi T, Kawashiro T. [Chronic respiratory failure--survival for nine years with home mechanical ventilation]. Nihon Kyobu Shikkan Gakkai Zasshi 1995; 33:1265-9. [PMID: 8583719] [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: 01/31/2023]
Abstract
We report the case of a woman, now 58 years old, with chronic respiratory failure due to spinal progressive muscular atrophy. She first noticed gradual progressive muscular weakness in her extremities in 1973. She started to complain of dyspnea on exertion in 1978. Chronic respiratory failure due to spinal progressive muscle atrophy was diagnosed in 1983. Home oxygen therapy was begun, but CO2 narcosis and exacerbation of chronic respiratory failure occurred at the end of that year. A tracheotomy was done and mechanical ventilation was begun. As her general condition improved and she could breathe without the ventilator for a few hours each day, home mechanical ventilation was begun. Seven years later, her general condition is still good and she can live without any life-threatening distress. There are few reports of patients in Japan who have survived for long periods of time with home mechanical ventilation. We believe that improvement in her respiratory care and in her social situation contributed to her long standing clinical course.
Collapse
Affiliation(s)
- Y Hiramine
- First Department of Internal Medicine, Tokyo Medical College
| | | | | | | | | | | | | | | |
Collapse
|