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( Takamasa Ishii ),( Masaki Miyazawa ),( Phil S. Hartman ),( Naoaki Ishii ) 생화학분자생물학회(구 한국생화학분자생물학회) 2011 BMB Reports Vol.44 No.5
Most intracellular reactive oxygen species (ROS), especially superoxide anion (O2·-) that is converted from oxygen, are overproduced by excessive electron leakage from the mitochondrial respiratory chain. Intracellular oxidative stress that damages cellular components can contribute to lifestyle-related diseases such as diabetes and arteriosclerosis, and age-related diseases such as cancer and neuronal degenerative diseases. We have previously demonstrated that the excessive mitochondrial O2·- production caused by SDHC mutations (G71E in C. elegans, I71E in Drosophila and V69E in mouse) results in premature death in C. elegans and Drosophila, cancer in mouse embryonic fibroblast cells and infertility in transgenic mice. SDHC is a subunit of mitochondrial complex II. In humans, it has been reported that mutations in SDHB, SDHC or SDHD often result in inherited head and neck paragangliomas (PGLs). Recently, we established Tet-mev-1 conditional transgenic mice using our uniquely developed Tet-On/Off system, which equilibrates transgene expression to endogenous levels. These mice experienced mitochondrial respiratory chain dysfunction that resulted in O2·- overproduction. The mitochondrial oxidative stress caused excessive apoptosis leading to low birth weight and growth retardation in the neonatal developmental phase in Tet-mev-1 mice. Here, we briefly describe the relationships between mitochondrial O2·- and aging phenomena in mev-1 animal models. [BMB reports 2011; 44(5): 298-305]
Taeko Ishii,Masaru Ishii,Yutaka Shimazu,Junichi Kikuta 한국분자세포생물학회 2011 Molecules and cells Vol.31 No.5
Sphingosine-1-phosphate (S1P), a biologically active lysophospholipid that is enriched in blood, controls the trafficking of osteoclast precursors between the circula-tion and bone marrow cavities via G protein-coupled receptors, S1PRs. While S1PR1 mediates chemoattraction toward S1P in bone marrow, where S1P concentration is low, S1PR2 mediates chemorepulsion in blood, where the S1P concentration is high. The regulation of precursor recruitment may represent a novel therapeutic strategy for controlling osteoclast-dependent bone remodeling. Through intravital multiphoton imaging of bone tissues, we reveal that the bidirectional function of S1P temporospatially regulates the migration of osteoclast precursors within intact bone tissues. Imaging technologies have enabled in situ visualization of the behaviors of several players in intact tissues. In addition, intravital microscopy has the potential to be more widely applied to functional analysis and intervention.
Changes in species diversity of ground beetle assemblages in riverbanks of the Yamato River, Japan
Cheol-min Lee,Ishii Minoru 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.10
We investigated ground beetles in riverbank of the Yamato River in Nara and Osaka Prefectures,to elucidate changes in the species diversity and assemblage structure.Ground beetles were collected with unbaited pitfall traps once a week from April to December 2006 at five sites; sandy and grassy riverbanks in Ikaruga (Site 1) and Sangoh Towns, Nara Prefecture (Site 2),a gravelly riverbed in a valley in Kashiwara City (Site 3),and sandy and grassy riverbanks with willow trees in Fujiidera (Site 4) and Matsubara Cities,Osaka Prefecture (Site 5). A total of 4,319 individuals belonging to 53 species from two families were captured at the 5 sites. Species richness was the highest at Site 4 (40 spp.), higher at Sites 2, 5 and 1 (31, 30 and 29 spp. respectively), and the lowest at Site 3 (19 spp.). Compared with results in 1988 (Ishii etal., 1996), species richness of both small-and middle-sized specie sand both temperate and northern species increased, and 2 southern species and 2 species endemic to Japan were newly recorded. It should be noted that large numbers of Bembidion lissonotum and Nobria lewisi, "gravel riverspecialists", were caught at Site3. Our results demonstrate that ground-beetle fauna was well maintained in riverbank of the Yamato River in last 18 years.
Ishii, Kosei 동국대학교 전자불전연구소 2001 전자불전 Vol.3 No.-
In the case where there are a number of variant editions extant for a single document, our first task must be that of gaining an accurate grasp of the distinctive characteristics of those variant texts. Thus, in this presentation, I would like to take up the example of the variant editions of Liang Wudi’s Bodhidharma Inscription, along with the texts are derived from this document, and analyze them through a variety of processes to clarify their genealogies. Once these kinds of processing methods are developed, they may be used broadly for purposes other than the construction of genealogy tables for variant editions.
Biquandle (co)homology and handlebody-links
Ishii, Atsushi,Iwakiri, Masahide,Kamada, Seiichi,Kim, Jieon,Matsuzaki, Shosaku,Oshiro, Kanako World Scientific Publishing Company 2018 Journal of knot theory and its ramifications Vol.27 No.11
<P>In this paper, we introduce the (co)homology group of a multiple conjugation biquandle. It is the (co)homology group of the prismatic chain complex, which is related to the homology of foams introduced by J. S. Carter, modulo a certain subchain complex. We construct invariants for <TEX>$ S^{1}$</TEX>-oriented handlebody-links using <TEX>$ 2$</TEX>-cocycles. When a multiple conjugation biquandle <TEX>$ X \times \mathbb{Z}_{type {X_{Y}}}$</TEX> is obtained from a biquandle <TEX>$ X$</TEX> using <TEX>$ n$</TEX>-parallel operations, we provide a <TEX>$ 2$</TEX>-cocycle (or <TEX>$ 3$</TEX>-cocycle) of the multiple conjugation biquandle <TEX>$ X \times \mathbb{Z}_{type {X_{Y}}}$</TEX> from a <TEX>$ 2$</TEX>-cocycle (or <TEX>$ 3$</TEX>-cocycle) of the biquandle <TEX>$ X$</TEX> equipped with an <TEX>$ X$</TEX>-set <TEX>$ Y$</TEX>.</P>
The Leading Finite Type Coefficients of the Links-Gould Polynomial of a Link
Ishii, Atsushi Department of Mathematics 2010 Kyungpook mathematical journal Vol.50 No.1
We show that the Links-Gould polynomial of a link has finite type coefficients in a multivariate series expansion, and express the leading coefficients in terms of the linking numbers of a link.
Microsurgical Training using Reusable Human Vessels from Discarded Tissues in Lymph Node Dissection
Ishii, Naohiro,Kiuchi, Tomoki,Oji, Tomito,Kishi, Kazuo Korean Society of Plastic and Reconstructive Surge 2016 Archives of Plastic Surgery Vol.43 No.6
The use of human vessels at the beginning of microsurgery training is highly recommended. But vessels with the appropriate length for training are not often obtained. Whether these vessels may be reused for training has not been reported. Accordingly, we harvested vessels from discarded tissues in lymph node dissection and demonstrated that vascular anastomosis training using the same human vessels several times is possible by placing the vessels in a freezer and defrosting them with hot water. Vascular walls can be stored for microsurgical training until about 4 years after harvest, as shown in the gross appearance and histologic findings of our preserved vessels. We recommend the technique presented here for the long-term reuse of human vessels for microsurgery training that closely resembles real procedures.