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1991 Fiscal Year Final Research Report Summary

Anti-tumor activity in relation to the effect on the energy transducting systems of the nucleophilic cyclopentendione derivatives.

Research Project

Project/Area Number 02671000
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Biological pharmacy
Research InstitutionThe University of Tokushima

Principal Investigator

TERADA Hiroshi  Faculty of Pharmaceutical Sciences, Professor, 薬学部, 教授 (00035544)

Co-Investigator(Kenkyū-buntansha) HORI Hitoshi  Faculty of Engineering, Associate Professor, 工学部, 助教授 (90119008)
Project Period (FY) 1990 – 1991
KeywordsCyclopentendione derivatives / Bioenergy / Anti-tumor activity / Mitochondria / Anti-tumor agents
Research Abstract

For development of new types of anti-tumor agents, it is important to search for chemical compounds that recognize a "specific state" of tumor cells that is markedly different from that of normal cells. Energy transducing-membrane systems such as mitochondria are good models to use in examining this possibility, because the state of the membrane changes according to their energy state. We have already found that cyclopentendiones are potent and specific inhibitors of the transport of inorganic phosphate that is indispensable for ATP synthesis. Thus, we used mitochondria from normal rat liver cells, and tumor cells that both produce ATP to study what changes took place on their membranes under various conditions, and the effects of nucleophilic cyclopentendiones on them. We analyzed the mechanisms and the effects of the inhibitors of energy transduction on mitochondria from normal and tumor cells. The results were as follows.
1)We succeeded in preparation of highly intact mitochondria from the tumor cell line AH130.
2)We developed a new type of TPP^+-selective electrode of small size which showed high sensitivity for TPP^+. Using this electrode for analysis of the energy state of mitochondria, we succeeded in finding several analogs of cyclopentendiones that inhibited energy transduction in tumor cells.
3)Furthermore, we found that some analogs of cyclopentendione inhibited phosphate transporter protein more efficiently in the tumor mitochondria than in normal mitochondria.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] H.Koike: "Why is Inorganic Phosphate Nessessary for Uncoupling of Oxidative Phosphorylation by Ca^<2+> in Rat Liver Mitochondria ?" Biochim.Biophys.Acta. 1060. 75-81 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Shinohara: "Remarkable Enhanced Expression of the Type II Hexokinase in Rat Hepatoma Cell Line AH130." FEBS Lett.291. 55-57 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Satake: "A Coated Wire Electrode Sensitive to Tetraphenylphosphonium Ion for Measurement of the Mitochondrial Membrane Potential." Anal.Lett.24. 295-304 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Terada: "Simple and Rapid Preparation of Intact Mitochondria from AH-130 Cells by N_2-Cavitation Method." Anal.Biochem.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Koike: "Ag^+ Causes Unique Uncoupling of Oxidative Phosphorylation in Rat Liver Mitochondria." FEBS Lett.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Terada: "The ADP/ATP Translocator Affects the Pi-Transport via the Pi/H^+ Symporter under Uncouple Conditions Induced by Cd^<2+>" J.Biol.Chem.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H. Koike et al.: "Why is inorganic phosphate necessary for the uncoupling of oxidative phosphorylation by Cd^<2+> in rat liver mitochondria" Biochim. Biophys. Acta. 1060. 75-81 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Shinohara et al.: "Remarkably enhanced expression of the type II hexokinase in rat hepatoma cell line AH130." FEBS LETT.291. 55-57 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Satake et al.: "A coated wire electrode sensitive to tetraphenylphosphonium ion for measurement of the mitochondrial membrane potential." Anal. Lett.24. 295-304 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Terada et al.: "Simple and rapid preparation of intact mitochondria from AH130 cells by N_2-cavitation method." Anal. Biochem. submi.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Koike et al.: "Ag^+ causes unique uncoupling of oxidative phosphorylation in rat liver mitochondria." FEBS Lett.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Terada et al.: "The ADP/ATP translocator affects the Pi-transport via the Pi/H^+ symporter under uncouple conditions induced by Cd^<2+>." J. Biol. Chem.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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