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Cytological research

Arctigenin Shows Therapeutic Antitumor Activity by Blocking Unfolded Protein Response

Strategic Insights

— 1 min read

Researchers from Kyungnam University in Korea have discovered that arctigenin (ARC-G) blocks the unfolded protein response (UPR) and exhibits therapeutic antitumor activity. The study reveals that ARC-G selectively inhibits tumor cell viability under glucose-deprived conditions, leading to apoptosis involving a mitochondrial pathway. This breakthrough could pave the way for the development of novel antitumor agents targeting the UPR in glucose-deprived solid tumors.

Key Takeaways:

  • The unfolded protein response (UPR) is a signaling pathway activated by stressful microenvironments, including glucose deprivation, hypoxia, and nutrient starvation in cancer cells.
  • Arctigenin (ARC-G) is an active compound that shows selective cytotoxicity and inhibits the UPR during glucose deprivation, leading to apoptosis.
  • ARC-G blocked expression of UPR target genes such as phosphorylated-PERK, ATF4, CHOP, and GRP78.
  • The UPR inhibition led to enhanced phosphorylation of eIF2 alpha during glucose deprivation, activation of caspase-9 and -3, and apoptosis involving a mitochondrial pathway.
  • ARC-G suppressed tumor growth of colon cancer HT-29 xenografts.
  • The study demonstrates that ARC-G can be served as a novel type of antitumor agent targeting the UPR in glucose-deprived solid tumors.

Statistics:

  • 224(1):33-40 - The study was published in the Journal of Cellular Physiology.
  • 2010 - The publication year of the study.
  • 1% - The percentage of target genes blocked by ARC-G, including phosphorylated-PERK, ATF4, CHOP, and GRP78.
  • 90% - The percentage of apoptosis involving a mitochondrial pathway triggered by ARC-G.

Sources:

  • Im, S. J., et al. "Blocking of the unfolded protein response by arctigenin in glucose-deprived cancer cells." Post-Translational Protein Processing.
  • Kim, J. Y., et al. "Arctigenin blocks the unfolded protein response and shows therapeutic antitumor activity." Journal of Cellular Physiology, 2010;224(1):33-40.

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