Extracts of Koelreuteria henryi Dummer induce apoptosis and autophagy by inhibiting dihydrodiol dehydrogenase, thus enhancing anticancer effects

Yung Yen Chiang, Shu Li Wang, Cheng Lin Yang, Hui Yu Yang, Hsiu Ching Yang, J. N. Sudhakar, Ching Kuo Lee, Hsiu Wen Huang, Chien Min Chen, Shiow Her Chiou, Shu Fen Chiang, Hsin Yuan Fang, Chih Yi Chen, Shwn Huey Shieh, Kuan Chih Chow

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7 Citations (Scopus)

Abstract

Dihydrodiol dehydrogenase (DDH) is frequently detected in cancer cells, and its overexpression correlates with drug resistance, the downregulation of DNA repair mechanisms, increased frequency of tumor recurrence, cancer cell metastasis and poor prognosis. The silencing of DDH expression using siRNA, on the other hand, reduces drug resistance and cancer cell mobility. These data suggest that DDH may be an oncogene-related protein. However, no specific DDH inhibitor has been identified to date. Thus, in this study, we used DDH as a target enzyme in a live-cell enzyme-linked immunosorbent assay to screen Chinese medicinal herb extracts (CMHEs) with the aim of identifying a DDH inhibitor. Using this method, we found 49 among 796 CMHEs that inhibited DDH expression. We selected three potential extracts, which had the highest activity against DDH, for further fractionation using high-performance liquid chromatography. The active ingredient was identified by immunoblot analysis. The function of the active ingredient was characterized by cell function analysis. Our results revealed that the CMHE-purified compounds targeted DDH, inducing autophagy and reducing DNA repair, which in turn enhanced the cytotoxic effects of the anticancer drugs and irradiation.

Original languageEnglish
Pages (from-to)577-584
Number of pages8
JournalInternational Journal of Molecular Medicine
Volume32
Issue number3
DOIs
Publication statusPublished - Sep 2013

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Keywords

  • Autophagy
  • Dihydrodiol dehydrogenase
  • Drug detoxification
  • Lipid flow
  • Oncogene

ASJC Scopus subject areas

  • Genetics

Cite this

Chiang, Y. Y., Wang, S. L., Yang, C. L., Yang, H. Y., Yang, H. C., Sudhakar, J. N., Lee, C. K., Huang, H. W., Chen, C. M., Chiou, S. H., Chiang, S. F., Fang, H. Y., Chen, C. Y., Shieh, S. H., & Chow, K. C. (2013). Extracts of Koelreuteria henryi Dummer induce apoptosis and autophagy by inhibiting dihydrodiol dehydrogenase, thus enhancing anticancer effects. International Journal of Molecular Medicine, 32(3), 577-584. https://doi.org/10.3892/ijmm.2013.1441