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Prosaposin regulates coenzyme Q10 levels in HepG2 cells especially those in mitochondria

Research Project

Project/Area Number 24500872
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Applied health science
Research InstitutionTokyo University of Technology

Principal Investigator

KASHIBA Misato  東京工科大学, 教養学環, 講師 (80338186)

Co-Investigator(Kenkyū-buntansha) YAMAMOTO Yorihiro  東京工科大学, 応用生物学部, 教授 (60134475)
Co-Investigator(Renkei-kenkyūsha) KASAHARA Emiko  大阪市立大学, 医学部, 特任講師 (30468269)
KAGEYAMA Haruaki  桐生大学, 医療保健学部, 准教授 (00433839)
Research Collaborator YOSHIMURA Shinichi  東京工科大学, 非常勤講師
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
KeywordsコエンザイムQ10 / プロサポシン / ミトコンドリア / サポシンB / 活性酸素種 / サポシン / コエンザイムQ10
Outline of Final Research Achievements

Coenzyme Q10 (CoQ10) is a key component of the mitochondrial electron transfer chain and an important antioxidant. We previously reported that saposin B (SapB) binds CoQ10 in human cells. To elucidate the physiological role of this complex, we made stable transfectants (Tf) of HepG2 that express prosaposin (Psap), precursor of saposin B. We also established Psap knockdown strain (KD). CoQ10 contents decreased in the following order: Wt-Tf > parent > KD. CoQ10 contents in mitochondrial fraction also decreased in the same order.Since CoQ10 is a component of the mitochondrial electron transfer chain, rate of oxygen consumption is measured by using clark-type electrode. Rate of oxygen consumption increased in Tf. Reduced form of CoQ10 is a strong antioxidant. Cellular ROS levels are analyzed by using fluorescence probe DCFH-DA. DCF level was reduced in Tf. These data show that saposin B and/or its precursor Psap regulates cellular CoQ10 level and its effect in HepG2 cells.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (11 results)

All 2015 2014 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (10 results) (of which Invited: 1 results)

  • [Journal Article] Prosaposin regulates coenzyme Q10 levels in HepG2 cells, especially those in mitochondria2014

    • Author(s)
      Kashiba M, Oizumi M, Suzuki M, Sawamura Y, Nagashima K, Yoshimura S, Yamamoto Y.
    • Journal Title

      Journal of Clinical Biochemistry and Nutrition

      Volume: 55 Issue: 2 Pages: 85-89

    • DOI

      10.3164/jcbn.13-106

    • NAID

      130004466769

    • ISSN
      0912-0009, 1880-5086
    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] マクロファージはコエンザイムQ10結合タンパク質プロサポシンと貪食した組織中のコエンザイムQ9を細胞外に分泌する2015

    • Author(s)
      下岸雅憲,田中裕人,森内 寛,吉村眞一,加柴美里,山本順寛
    • Organizer
      日本コエンザイムQ 協会第12回研究会
    • Place of Presentation
      東京工科大学(東京都八王子市)
    • Year and Date
      2015-02-03
    • Related Report
      2014 Annual Research Report
  • [Presentation] コエンザイムQ10結合タンパク質プロサポシンによる細胞接着の制御2014

    • Author(s)
      根本 亘,加柴美里,鈴木 優,吉村眞一,山本順寛
    • Organizer
      第29 回日本酸化ストレス学会関東支部会
    • Place of Presentation
      筑波大学東京キャンパス文京校舎(東京都文京区)
    • Year and Date
      2014-12-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] コエンザイムQ10結合タンパク質プロサポシンによるCoQ酸化還元動態の制御2014

    • Author(s)
      加柴美里,大泉美希子,寺嶋政之,吉村眞一,山本順寛
    • Organizer
      第67回日本酸化ストレス学会学術集会
    • Place of Presentation
      同志社大学(京都府京都市)
    • Year and Date
      2014-09-04 – 2014-09-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] コエンザイムQ10(CoQ10)結合蛋白質プロサポシンは細胞内CoQ10量を制御する

    • Author(s)
      加柴美里,大泉美希子,鈴木 優,澤村佳美,長嶋康平,ジョン・チュンユン,森内 寛,吉村眞一,山本順寛
    • Organizer
      第66回日本酸化ストレス学会学術集会
    • Place of Presentation
      ウインクあいち。名古屋
    • Related Report
      2013 Research-status Report
  • [Presentation] Prosaposin regulates coenzyme Q10 levels in HepG2 cells especially those in mitochondria

    • Author(s)
      Misato Kashiba, Mikiko Oizumi, Masaru Suzuki, Yoshimi Sawamura, Tatsuya Sakemi, Kohei Nagashima, Hiroshi Moriuchi, Shinichi Yoshimura, Yorihiro Yamamoto
    • Organizer
      17th biennial meeting of society for free radical research international
    • Place of Presentation
      京都国際会議場、kyoto
    • Related Report
      2013 Research-status Report
  • [Presentation] The role of prosaposin and saposin B as the coenzyme Q10 binding and transfer protein

    • Author(s)
      Yorihiro Yamamoto, Makoto Hasegawa, Kazunari Takase, Mayuko Nishimura, Miyoshi Nagao, Yoshihiro Yamazaki, Yuki Kakizawa, Hiroshi Moriuchi, Junko Matsuda, Misato Kashiba, Shinichi Yoshimura
    • Organizer
      17 th Biennial Meeting of Society for Free Radical Research International
    • Place of Presentation
      京都国際会議場、Kyoto
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] ミクロ2次元電気泳動を用いたCoQ結合タンパク質サポシンBの定量法の開発

    • Author(s)
      野村剛,田中秀幸,加柴美里,森内寛,吉村眞一,山本順寛,藤沢章雄
    • Organizer
      第10回日本コエンザイムQ協会研究会
    • Place of Presentation
      東京(東京工科大学)
    • Related Report
      2012 Research-status Report
  • [Presentation] コエンザイムQ10結合タンパク質プロサポシンの血漿レベルとリポたんぱく質との相互作用

    • Author(s)
      宮内優樹,緋田哲也,永瀬 翠,森内 寛,加柴美里,吉村眞一,山本順寛
    • Organizer
      第10回日本コエンザイムQ協会研究会
    • Place of Presentation
      東京(東京工科大学)
    • Related Report
      2012 Research-status Report
  • [Presentation] CoQ10結合蛋白質プロサポシン発現量改変株の細胞内CoQ10量と活性酸素量の変動

    • Author(s)
      ジョン・チュンユン,長嶋康平,森内 寛,加柴美里,吉村眞一,山本順寛
    • Organizer
      第10回日本コエンザイムQ協会研究会
    • Place of Presentation
      東京(東京工科大学)
    • Related Report
      2012 Research-status Report
  • [Presentation] コエンザイムQ10 結合タンパク質プロサポシンの母乳中での役割

    • Author(s)
      宮内 優樹,関 学,宮前多佳子,石田 史彦,森内 寛,加柴 美里,横田 俊平,山本 順寛
    • Organizer
      第65回 日本酸化ストレス学会学術集会
    • Place of Presentation
      徳島(徳島県郷土文化会館)
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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