Search Results 1-20 of 157

  • Estimation of chemotaxis intensity of <i>Salmonella</i> cells by the capillary assay and biased random walk simulation

    Nakai Tonau , Yoshino Junpei , Goto Tomonobu

    … <p>Bacterial cells exhibit chemotaxis by repeating a straight swimming (run) and an abrupt change of the swimming direction (tumble). … As for the chemotaxis mechanism, a mathematical model has been proposed where the frequency of the tumble is correlated with the chemotaxis intensity. …

    Journal of Aero Aqua Bio-mechanisms 8(1), 63-68, 2019

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  • Exponential Attractor for One-Dimensional Self-Organizing Target-Detection Model

    Iwasaki Satoru

    … [8] utilized the Keller-Segel model for mobile bionanosensor networks for target tracking. … In this paper, we would like to study analytically their model. … We first construct a unique local solution for model equations. …

    Funkcialaj Ekvacioj 62(1), 75-93, 2019

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  • Signal regulatory protein alpha blockade potentiates tumoricidal effects of macrophages on gastroenterological neoplastic cells in syngeneic immunocompetent mice

    Abe Tomoyuki , Tanaka Yuka , Piao Jinlian , Tanimine Naoki , Oue Naohide , Hinoi Takao , Verjan Garcia Noel , Miyasaka Masayuki , Matozaki Takashi , Yasui Wataru , Ohdan Hideki

    … To investigate anti-SIRPα mAb therapy-induced inhibitory effects on sporadic colon cancer growth, we used a CDX2P9.5-NLS Cre;APC+/FLOX (CPC-APC) mouse model. … Anti‐CD47 mAb administration in vivo eliminated the phagocytosis‐promoting CD47 blockade effect, probably by inhibiting macrophage transmigration/chemotaxis. …

    Annals of Gastroenterological Surgery 2(6), 451-462, 2018-11

    IR 

  • Optimal mutual coupling between receptors in a model of chemotaxis in two-dimensional space  [in Japanese]

    Yoshii Reina , Kori Hiroshi

    Meeting Abstracts of the Physical Society of Japan 73.2(0), 2430-2430, 2018

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  • Optimal mutual coupling between receptors in a model of chemotaxis  [in Japanese]

    Yoshii Reina , Kori Hiroshi

    Meeting Abstracts of the Physical Society of Japan 73.1(0), 2652-2652, 2018

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  • Estimation of Chemotaxis Intensity of <i>Salmonella</i> Cells by a Mathematical Model and Observation  [in Japanese]

    NAKAI Tonau , YOSHINO Junpei , ANDO Taishi , GOTO Tomonobu

    … <p>Bacterial cells exhibit chemotaxis by repeating straight swimming (run) and an abrupt change of the swimming direction (tumble). … As for the chemotaxis mechanism, a mathematical model has been proposed where the frequency of the tumble is correlated with the chemotaxis intensity. … In this study, we observe the chemotaxis of bacterial cells to compare the measurement with the mathematical model. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2018(0), 2P1-G09, 2018

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  • Large Time Behavior in a Chemotaxis Model with Nonlinear General Diffusion for Tumor Invasion

    Fujie Kentarou , Ishida Sachiko , Ito Akio , Yokota Tomomi

    … This paper deals with a chemotaxis system modeling tumor invasion. …

    Funkcialaj Ekvacioj 61(1), 37-80, 2018

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  • Alzheimer's disease pathology in Nasu-Hakola disease brains

    Satoh Jun-ichi , Kino Yoshihiro , Yanaizu Motoaki , Saito Yuko

    … TREM2 transmits the signals involved in microglial survival, proliferation, chemotaxis, and phagocytosis. … A recent study indicated that a loss of TREM2 function causes greater amounts of amyloid-β(Aβ) deposition in the hippocampus of a mouse model of Alzheimer's disease (AD) owing to a dysfunctional response of microglia to amyloid plaques, suggesting that TREM2 facilitates Aβ clearance by microglia. …

    Intractable & Rare Diseases Research 7(1), 32-36, 2018

    J-STAGE  Ichushi Web 

  • Galectin-9 Changes Its Function to Maintain Homeostasis  [in Japanese]

    Hirashima Mitsuomi , Niki Toshiro , Masaki Tsutomu

    <p>Galectin-9(Gal9)/Ecalectinは細胞由来の好酸球遊走因子として同定された。Gal-9はアレルギーモデル動物やアレルギー患者の好酸球集積や活性化に置いて役割を示している。なぜならGal-9は<i>in vitro</i>および<i>in vivo</i>で遊走活性を示すとともに色々な局面で活性化の機能も示すと考え …

    Trends in Glycoscience and Glycotechnology 30(172), SJ55-SJ64, 2018

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  • Galectin-9 Changes Its Function to Maintain Homeostasis

    Hirashima Mitsuomi , Niki Toshiro , Masaki Tsutomu

    … Gal-9 was shown to induce eosinophil chemotaxis <i>in vitro</i> …

    Trends in Glycoscience and Glycotechnology 30(172), SE109-SE118, 2018

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  • Enzyme Chemotaxis on Paper-based Devices

    ILACAS Grenalynn C. , BASA Alexis , SEN Ayusmen , GOMEZ Frank A.

    Chemotaxis is the movement of materials, particularly biological species, in response to the influence of chemical stimulation. … Herein, we describe, for the first time, chemotactic behavior on a microfluidic paper-based analytical device (μPAD) to afford a distribution of products not obtainable under other (non-μPAD) experimental conditions using as a model enzyme-substrate system glucose oxidase (GOx) and glucose. …

    Analytical Sciences 34(1), 115-119, 2018

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  • Optimal Estimation Method of Temporal Odor Concentration Profile for Plume Tracking in Dynamic Turbulent Environment

    Muhtadi Muis , Nakamoto Takamichi

    … A dynamic turbulent environment model with an odor source was modeled using Computational Fluid Dynamics (CFD) software, and the resulting data were used for a plume tracking simulation. … Each method was embedded into a chemotaxis-anemotaxis based plume tracking strategy to localize the source. …

    IEEJ Transactions on Sensors and Micromachines 138(1), 15-22, 2018

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  • Revisiting chemoaffinity theory: Chemotactic implementation of topographic axonal projection

    Naoki Honda

    … How growth cone chemotaxis builds the macroscopic structure of the neural circuit is a fundamental question in neuroscience. … To identify the chemotactic mechanism of topographic mapping, I developed a mathematical model of intracellular signaling in the growth cone that focuses on the growth cone's unique chemotactic property of being attracted or repelled by the same guidance cues in different biological situations. …

    PLOS Computational Biology 13(8), 2017-08-08

    IR 

  • Numerical analysis on the traveling pulse in a kinetic chemotaxis model (Mathematical Analysis in Fluid and Gas Dynamics)

    Yasuda Shugo

    … A kinetic transport equation for chemotactic bacteria, i.e., a kinetic chemotaxis equation, coupled with reaction-diffusion equations for chemoattractants is considered. … The Keller-Segel type equation for the population density of bacteria is derived by the asymptotic analysis of the kinetic chemotaxis equation in the continuum limit, where the ratio of the mean run length of bacteria to the characteristic length of the system, i.e., the Knudsen number, vanishes. …

    数理解析研究所講究録 (2038), 130-139, 2017-07

    IR 

  • Mathematical differentiation and integration of odor information for decision-making in worms  [in Japanese]

    木村 幸太郎 , 谷本 悠生

    Aroma research = アロマリサーチ : journal of aroma science technology and safety 18(3), 266-271, 2017

  • mathematical model of chemotaxis based on mutual inhibition between receptors  [in Japanese]

    Yoshii Reina , Kori Hiroshi

    Meeting Abstracts of the Physical Society of Japan 72.2(0), 2636-2636, 2017

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  • Trade-off between sensory capacity and information-thermodynamics efficiency in the model of E.coli chemotaxis  [in Japanese]

    Matsumoto T. , Sagawa T.

    <p>大腸菌は周りの化学物質の濃度勾配を読み取り、それに応じて方向性を持った運動を行う「化学走性」と呼ばれる能力をもつ。その機構は二変数の線形ランジュバン系で有効に記述されることが明らかになっている。我々はまず、情報熱力学の観点からメモリーに対して定義されるセンサー容量(sensory capacity)と情報熱力学効率の間に存在するトレードオフを導出した。そして実際の大腸菌においては …

    Meeting Abstracts of the Physical Society of Japan 72.1(0), 2919-2919, 2017

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  • Measurement and Simulation on the Distribution of Salmonella Cells around a Chemical Attractant  [in Japanese]

    YOSHINO Junpei , KAJITANI Mami , MITSUI Hiroki , NAKAI Tonau , GOTO Tomonobu

    … <p>Bacteria exhibit chemotaxis accumulating in higher concentration places by reducing frequency of tumbles (changes of the swimming direction) when they approach an attractant. … This process of the chemotaxis has been ever simulated by using the biased random walk model. … In this study, we verify the simulation model by measuring the time variation of the distribution of <i>Salmonella typhimurium</i> …

    The Proceedings of Mechanical Engineering Congress, Japan 2017(0), G0200102, 2017

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  • Building a complete image of genome regulation in the model organism <i>Escherichia coli</i>

    Ishihama Akira

    … <p>The model organism, <i>Escherichia coli</i>, contains a total of more than 4,500 genes, but the total number of RNA polymerase (RNAP) core enzyme or the transcriptase is only about 2,000 molecules per genome. … This review summarizes the findings by this group, first focusing on three sigma factors, the stationary-phase sigma RpoS, the heat-shock sigma RpoH, and the flagellar-chemotaxis sigma RpoF, as examples. …

    The Journal of General and Applied Microbiology 63(6), 311-324, 2017

    J-STAGE 

  • Study on transporting nanomaterial by C. elegans chemotaxis  [in Japanese]

    CHIMBE Kosuke , KIMURA Koutaro , UESUGI Kaoru , MORISHIMA Keisuke

    … elegans is widely used as a model organism because it is easy to observe by having a transparent body with a body length of about 1 mm and it is easy to cultivate in large quantity. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2017(0), 2P2-N05, 2017

    J-STAGE 

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