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Tsubakio-Yamamoto K, Ohama T, Inagaki M, Nakatani K, Sandoval J, Masuda D, Nakagawa-Toyama Y, Nishida M, Ishigami M, Yamashita S. Abstract: P862 SERUM OXYSTEROL LEVELS ARE ELEVATED IN A PATIENT WITH GIANT NECROTIC TENDON XANTHOMATOSIS AND CAROTID AND CORONARY ATHEROSCLEROSIS. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70983-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ohama T, Yamamoto K, Nakatani K, Inagaki M, Sandoval J, Masuda D, Toyama Y, Nishida M, Ishigami M, Yamashita S. Abstract: P430 ROLE OF ADIPONECTIN IN THE ATHEROPROTECTIVE SYSTEM VIA HDL-CHOLESTEROL. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70725-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Masuda D, Inagaki M, Nakatani K, Tsubakio-Yamamoto K, Ohama T, Nakagawa-Toyama Y, Nishida M, Ishigami M, Yamashita S. Abstract: P749 SERUM CONCENTRATIONS OF LINOLEIC ACIDS AND THEIR DERIVATIVES BY LIPID PEROXIDATION ARE INCREASED IN PATIENTS WITH CD36 DEFICIENCY. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70118-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Inagaki M, Masuda D, Nakatani K, Tsubakio-Yamamoto K, Ohama T, Nakagawa-Toyama Y, Nishida M, Ishigami M, Yamashita S. Abstract: P410 EZETIMIBE IMPROVES POSTPRANDIAL HYPERLIPIDEMIA IN PATIENTS WITH TYPE IIB HYPERLIPIDEMIA. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70705-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ishigami M, Taguchi M, Nishida M, Moriyama T, Yamashita S, Yamamura T. Abstract: P926 CLINICAL SIGNIFICANCE OF REMNANT LIPOPROTEIN CHOLESTEROL DETERMINATION IN METABOLIC SYNDROMESTUDIES WITH A NEWLY DEVELOPED HOMOGENOUS ASSAY-. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71047-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Koseki M, Tsubakio-Yamamoto K, Yuasa-Kawase M, Oku H, Sandoval J, Masuda D, Matsuura F, Nishida M, Ishigami M, Hirano K, Hattori H, Shimomura I, Hori M, Yamashita S. EZETIMIBE MARKEDLY REDUCED SERUM PLANT STEROLS IN JAPANESE PATIENTS WITH SITOSTEROLEMIA. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70744-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yamamoto K, Koseki M, Matsuura F, Oku H, Sandoval J, Kawase M, Masuda D, Nishida M, Ishigami M, Hirano K, Kihara S, Hori M, Shimomura I, Yamashita S. ADIPONECTIN ENHANCES APOA-1- AND HDL- MEDIATED CHOLESTEROL EFFLUX FROM HUMAN MONOCYTE-DERIVED MACROPHAGES. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70202-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chen JH, Jang C, Xiao S, Ishigami M, Fuhrer MS. Intrinsic and extrinsic performance limits of graphene devices on SiO2. NATURE NANOTECHNOLOGY 2008; 3:206-9. [PMID: 18654504 DOI: 10.1038/nnano.2008.58] [Citation(s) in RCA: 910] [Impact Index Per Article: 56.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2007] [Accepted: 02/19/2008] [Indexed: 05/23/2023]
Abstract
The linear dispersion relation in graphene gives rise to a surprising prediction: the resistivity due to isotropic scatterers, such as white-noise disorder or phonons, is independent of carrier density, n. Here we show that electron-acoustic phonon scattering is indeed independent of n, and contributes only 30 Omega to graphene's room-temperature resistivity. At a technologically relevant carrier density of 1 x1012 cm-2, we infer a mean free path for electron-acoustic phonon scattering of >2 microm and an intrinsic mobility limit of 2 x 105 cm2 V-1 s-1. If realized, this mobility would exceed that of InSb, the inorganic semiconductor with the highest known mobility ( approximately 7.7 x 104 cm2 V-1 s-1; ref. 9) and that of semiconducting carbon nanotubes ( approximately 1 x 105 cm2 V-1 s-1; ref. 10). A strongly temperature-dependent resistivity contribution is observed above approximately 200 K (ref. 8); its magnitude, temperature dependence and carrier-density dependence are consistent with extrinsic scattering by surface phonons at the SiO2 substrate and limit the room-temperature mobility to approximately 4 x 104 cm2 V-1 s-1, indicating the importance of substrate choice for graphene devices.
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Kawase M, Masuda D, Hirano K, Ikegami C, Oku H, Sandoval J, Yamamoto K, Takada M, Ishikawa Y, Kirino M, Koseki M, Matsuura F, Yamane M, Nishida M, Ishigami M, Shimomura I, Yamashita S. PO18-513 CD36 DEFICIENCY IS ASSOCIATED WITH PHENOTYPES OF THE METABOLIC SYNDROME AND ENHANCED ATHEROSCLEROTIC CARDIOVASCULAR DISEASES. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71523-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Masuda D, Hirano K, Tochino Y, Ikegami C, Oku H, Sandoval J, Kawase M, Yamamoto K, Koseki M, Matsuura F, Nishida M, Ishigami M, Shimomura I, Yamashita S. PO2-36 POSTPRANDIAL HYPERTRIGLYCERIDEMIA IN CD36 DEFICIENCY IS CAUSED BY AN ACCELERATED LIPOPROTEIN SYNTHESIS IN THE SMALL INTESTINES. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71046-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ishigami M, Chen JH, Cullen WG, Fuhrer MS, Williams ED. Atomic structure of graphene on SiO2. NANO LETTERS 2007; 7:1643-8. [PMID: 17497819 DOI: 10.1021/nl070613a] [Citation(s) in RCA: 550] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We employ scanning probe microscopy to reveal atomic structures and nanoscale morphology of graphene-based electronic devices (i.e., a graphene sheet supported by an insulating silicon dioxide substrate) for the first time. Atomic resolution scanning tunneling microscopy images reveal the presence of a strong spatially dependent perturbation, which breaks the hexagonal lattice symmetry of the graphitic lattice. Structural corrugations of the graphene sheet partially conform to the underlying silicon oxide substrate. These effects are obscured or modified on graphene devices processed with normal lithographic methods, as they are covered with a layer of photoresist residue. We enable our experiments by a novel cleaning process to produce atomically clean graphene sheets.
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Matsuura F, Koseki M, Oku Y, Ikegami C, Kawase M, Yamamoto K, Masuda D, Nishida M, Ishigami M, Hirano K, Kihara S, Shimomura I, Yamashita S. PO1-4 ADIPONECTIN ACCELERATES REVERSE CHOLESTEROL TRANSPORT BY INCREASING HDL ASSEMBLY THROUGH UPREGULATION OF ABCA1 PATHWAY AND APOA-I SYNTHESIS IN THE LIVER. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71014-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ishigami M, Sau JD, Aloni S, Cohen ML, Zettl A. Symmetry breaking in boron nitride nanotubes. PHYSICAL REVIEW LETTERS 2006; 97:176804. [PMID: 17155494 DOI: 10.1103/physrevlett.97.176804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2006] [Indexed: 05/12/2023]
Abstract
We have imaged boron nitride nanotubes with atomic scale resolution using scanning tunneling microscopy. While some nanotubes show the expected triangular lattice pattern, the majority of the nanotubes show unusual stripe patterns which break the underlying symmetry of the boron nitride lattice. We identify the origin of the symmetry breaking and demonstrate that conventional STM imaging analysis is inadequate for boron nitride nanotubes.
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Yorifuji S, Iwatani Y, Kawano S, Inagaki S, Sugiyama H, Matsuura N, Yamanura T, Yamamoto Y, Higashi T, Horio M, Oji Y, Yamaguchi H, Watanabe M, Kawaguchi N, Ohoka Y, Hirata M, Ishigami M, Eguchi H, Hamada Y. [Extensive educational program for high performance medical technologists]. RINSHO BYORI. THE JAPANESE JOURNAL OF CLINICAL PATHOLOGY 2006; 54:295-8. [PMID: 16637580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The education system for medical technologists has recently been revolutionized, their educational periods vary from 2 to 9 years, and some already have doctoral degrees. In such a new situation, our faculty thinks that the most important point for new medical technologists is the ability to have a broad view of the clinical fields, especially the view of patients. Special training in bed-side education and a stint in several divisions, such as the surgical operation room, rehabilitation. radiological examination room, pharmacy, central storage room of medical records, and medical informatics, and so on, of the hospital is a powerful tool to obtain a broad view of the various clinical fields and can be essential for developing high performance medical technologists. As nine years have passed since starting this education, we evaluated this practice through systematic personal communication. As a result, it was found to be extremely effective for many reasons such as having a continuous image of the patient when they examine the blood sample in the hospital laboratory, showing advanced laboratory performance, and having no mental barrier to visiting the wards and so on. The abilities of our alumni are praised highly by many large scale hospitals around the country and 50% of them are working in the clinical laboratory division of these hospitals. About 40% are working in the division of research and development in various companies. We express sincere thanks to the director and all cooperative individuals for this course in the Osaka University Hospital.
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Ishigami M, Yamashita S, Sakai N, Miyauchi K, Yamamura T. Th-P15:79 New assay for remnant lipoprotein cholesterol using selective detergents and phospholipase D-clinical significance in postprandial hyperlipidemia. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82039-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yoshioka K, Ito H, Watanabe K, Yano M, Ishigami M, Mizutani T, Sasaki Y, Goto H. Interferon sensitivity-determining region of nonstructural region 5A of hepatitis C virus genotype 1b correlates with serum alanine aminotransferase levels in chronic infection. J Viral Hepat 2005; 12:139-45. [PMID: 15720528 DOI: 10.1111/j.1365-2893.2005.00561.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The mutations in the interferon (IFN) sensitivity-determining region (ISDR) of nonstructural region 5A (NS5A) of hepatitis C virus (HCV) have been correlated with response to IFN therapy. NS5A appears to disrupt a host antiviral pathway that plays a role in suppressing virus replication and protects hepatocytes from apoptosis. We assessed whether ISDR correlates with viral load and serum alanine aminotransferase (ALT) levels. Serum viral load and ALT levels were prospectively measured bimonthly by HCV core protein assay and monthly, respectively, for 22 months in 87 patients chronically infected with HCV genotype 1b. ISDR of HCV was directly sequenced from the products of reverse transcription and polymerase chain reaction of HCV RNA. Five patients had four or more substitutions (mutant type), 33 had 1-3 (intermediate type), and 49 had no substitutions (wild type) in ISDR. The numbers of substitutions in ISDR were inversely correlated with mean viral load over a 22-month period (r = 0.292, P = 0.0060) and directly with mean serum ALT levels (r = 0.360, P = 0.0006). The numbers of substitutions in ISDR was significantly larger in the patients with changes of viral load more than fivefold during the 22 months (1.4 +/- 2.4) than in those without changes (0.6 +/- 0.8) (P = 0.0188). The present study demonstrates that the patients with more substitutions in ISDR had significantly higher serum ALT levels and smaller viral load. These results suggest that NS5A with more substitutions in ISDR may lose the ability to block host antiviral pathways and to protect hepatocytes from apoptosis.
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Ishigami M, Sau JD, Aloni S, Cohen ML, Zettl A. Observation of the giant stark effect in boron-nitride nanotubes. PHYSICAL REVIEW LETTERS 2005; 94:056804. [PMID: 15783676 DOI: 10.1103/physrevlett.94.056804] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2004] [Indexed: 05/24/2023]
Abstract
Bias dependent scanning tunneling microscopy and scanning tunneling spectroscopy have been used to characterize the influence of transverse electric fields on the electronic properties of boron-nitride nanotubes (BNNTs). We find experimental evidence for the theoretically predicted giant Stark effect. The observed giant Stark effect significantly reduces the band gap of BNNTs and thus greatly enhances the utility of BNNTs for nanoscale electronic, electromechanical, and optoelectronic applications.
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Ishigami M, Choi HJ, Aloni S, Louie SG, Cohen ML, Zettl A. Identifying defects in nanoscale materials. PHYSICAL REVIEW LETTERS 2004; 93:196803. [PMID: 15600863 DOI: 10.1103/physrevlett.93.196803] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2004] [Indexed: 05/24/2023]
Abstract
We have developed a novel iterative experimental-theoretical technique which can identify the atomic structure of defects in many-atom nanoscale materials from scanning tunneling microscopy and spectroscopy data. A given model for a defect structure is iteratively improved until calculated microscopy and spectroscopy data based on the model converge on the experimental results. We use the technique to identify a defect responsible for the electronic properties of a carbon nanotube intramolecular junction. Our technique can be extended for analysis of defect structures in nanoscale materials in general.
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Matsuyama A, Sakai N, Ishigami M, Kashine S, Hirata A, Nakamura T, Hiraoka H, Yamashita S. M.584 Matrix metalloproteinases as novel disease markers in takayasu arteritis. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90582-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Matsuyama A, Sakai N, Ishigami M, Kashine S, Hirata A, Nakamura T, Hiraoka H, Yamashita S. M.585 Minocycline has a steroid-sparing effect in treatment of Takayasu arteritis. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90583-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Saika Y, Sakai N, Takahashi M, Maruyama T, Kihara S, Ouchi N, Ishigami M, Hiraoka H, Nakamura T, Yamashita S, Matsuzawa Y. Novel LPL mutation (L303F) found in a patient associated with coronary artery disease and severe systemic atherosclerosis. Eur J Clin Invest 2003; 33:216-22. [PMID: 12641539 DOI: 10.1046/j.1365-2362.2003.01129.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Patients with lipoprotein lipase (LPL) deficiency had been generally thought to be spared accelerated atherosclerosis in spite of a marked elevation of plasma triglyceride levels. However, it has been recently reported that some heterozygous and homozygous LPL-deficient patients are associated with premature atherosclerosis. In this paper, we report a 55-year-old type I hyperlipidaemic patient with a novel missense mutation in the LPL gene. PATIENT AND RESULTS The patient had suffered from coronary artery disease, abdominal aortic aneurysm, and stenoses of the bilateral renal arteries and superficial femoral arteries. Sequencing of the genomic DNA revealed that the patient was a homozygote for the mutation, a G to C transition at nucleotide position 1069 in the exon 6, resulting in an amino acid substitution of Phe for Leu303 (L303F). Approximately 6% and approximately 40% of normal LPL activity and LPL mass, respectively, were detected in the patient's postheparin plasma. An in vitro expression study demonstrated that COS7 cells transfected with L303F mutant cDNA produced a 40% amount of LPL protein in cell lysates compared with normal cDNA, but no protein was detected in the media. Lipoprotein lipase activity was completely absent in both lysates and media of the cells transfected with the mutant cDNA, suggesting that this mutation in the LPL gene results in the production of a functionally inactive protein. CONCLUSION This case suggests that the LPL missense mutation (L303F), which impairs lipolysis but preserves the LPL mass, is proatherogenic.
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Koseki M, Matsuyama A, Ishigami M, Hirano K, Sakai N, Hiraoka H, Nakamura T, Hattori H, Nagano M, Egashira T, Yamashita S, Matsuzawa Y. 2P-0450 Identification of a novel mutation in the ATP-binding cassette transporter G5 (ABCG5) in a Japanese patient with sitosterolemia. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90592-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ohama T, Hirano K, Zhang Z, Tsujii K, Nakagawa-Toyoma Y, Matsuyama A, Ishigami M, Sakai N, Hiraoka H, Ueda K, Yamashita S, Matsuzawa Y. 2P-0441 Dominant expression of ATP binding cassette transporter A1 on basolateral surface of human intestinal epithelium. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90583-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ishigami M, Yamashita S, Sakai N, Hirano K, Hiraoka H, Nakamura T, Matsuzawa Y. 2P-0556 Effects of atorvastatin on remnant lipoprotein metabolism in type III hyperlipoproteinemia - comparison with fenofibrate. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90695-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kuwasako T, Hirano KI, Sakai N, Ishigami M, Hiraoka H, Yamashita S, Matsuzawa Y. 3P-0751 Postprandial hyperlipidemia and increased remnant lipoproteins in human genetic CD36 deficiency. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90969-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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