Biochemistry (Moscow)

, 76:1164

Methylglyoxal induces mitochondria-dependent apoptosis in sarcoma

Authors

  • A. Ghosh
    • Department of Biological ChemistryIndian Association for the Cultivation of Science
  • S. Bera
    • Department of Biological ChemistryIndian Association for the Cultivation of Science
  • S. Ray
  • T. Banerjee
    • Department of Biological ChemistryIndian Association for the Cultivation of Science
    • Department of Biological ChemistryIndian Association for the Cultivation of Science
Article

DOI: 10.1134/S0006297911100105

Cite this article as:
Ghosh, A., Bera, S., Ray, S. et al. Biochemistry Moscow (2011) 76: 1164. doi:10.1134/S0006297911100105

Abstract

In the preceding paper (A. Ghosh et al. (2011) Biochemistry (Moscow), 76, 1051–1060), using several comparable tissue materials, it has been convincingly demonstrated that methylglyoxal, a normal metabolite, inhibits mitochondrial complex I of specifically malignant cells. This suggests a distinct alteration of complex I, a highly important enzyme for energy (ATP) production, in malignancy. The present paper shows that as a consequence of this inhibition mitochondrial membrane potential is drastically reduced in sarcoma tissue but not in normal skeletal muscle. This was estimated spectrofluorimetrically using the dye rhodamine 123. As a consequence, cytochrome c was released from the sarcoma mitochondria as evidenced by Western blot analysis. Moreover, on treatment with methylglyoxal membrane potential collapse of sarcoma 180 cells was also indicated by fluorescence-activated cell sorter analysis. Atomic force microscopic study demonstrated gross structural alteration specifically of tumor mitochondria on methylglyoxal treatment. All these studies suggest that methylglyoxal might initiate an apoptotic event in malignant cells.

Key words

sarcomamethylglyoxalmembrane potentialatomic force microscopycytochrome

Abbreviations

AFM

atomic force microscopy

FACS

fluorescence-activated cell sorter

JC-1

5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethyl benzimidazolyl carbocyanine iodide

3MC

3-methyl cholanthrene

Copyright information

© Pleiades Publishing, Ltd. 2011