Automatic positioning of a microinjector in mouse ES cells and rice protoplasts

Hideaki Matsuoka, Soichiro Shimoda, Yoshiyuki Miwa, Mikako Saito

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    A 2-channel (2C) microinjector was prepared by pulling a glass capillary with a θ-shaped cross section. One channel was used as a potential measuring electrode (MeaE) and the other was used as an electrophoretic introduction electrode (IntE). The 2C microinjector was propelled by an oil pressure manipulator driven by a pulse motor, while the MeaE output was recorded continuously. When the 2C microinjector penetrated the cell membrane of a mouse ES cell or a rice protoplast, the output potential changed sharply. The differential of this potential change was used as a stop signal for the pulse motor. Thus, the microinjector was correctly positioned in the cell without losing cell viability. Its success rate was 73% and 84% for ES cells and rice protoplasts, respectively. After the positioning of the microinjector in the cell, Lucifer yellow (LY) was introduced via IntE. Under these conditions, the rate of viable cells was 16% and 62% for ES cells and rice protoplasts, respectively.

    Original languageEnglish
    Pages (from-to)187-192
    Number of pages6
    JournalBioelectrochemistry
    Volume69
    Issue number2
    DOIs
    Publication statusPublished - 2006 Oct

    Fingerprint

    protoplasts
    Protoplasts
    rice
    positioning
    mice
    Stepping motors
    Electrodes
    cells
    electrodes
    Pulse
    Cell membranes
    Manipulators
    Oils
    output
    Cells
    pulling
    pulses
    viability
    Glass
    Oryza

    Keywords

    • Automatic positioning
    • ES cell
    • Intracellular potential
    • Microinjector
    • Rice protoplast

    ASJC Scopus subject areas

    • Biophysics
    • Electrochemistry
    • Physical and Theoretical Chemistry

    Cite this

    Automatic positioning of a microinjector in mouse ES cells and rice protoplasts. / Matsuoka, Hideaki; Shimoda, Soichiro; Miwa, Yoshiyuki; Saito, Mikako.

    In: Bioelectrochemistry, Vol. 69, No. 2, 10.2006, p. 187-192.

    Research output: Contribution to journalArticle

    Matsuoka, Hideaki ; Shimoda, Soichiro ; Miwa, Yoshiyuki ; Saito, Mikako. / Automatic positioning of a microinjector in mouse ES cells and rice protoplasts. In: Bioelectrochemistry. 2006 ; Vol. 69, No. 2. pp. 187-192.
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