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Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
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Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Published on: February 6, 2019

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ZY0511, a novel, potent and selective LSD1 inhibitor, exhibits anticancer activity against solid tumors via the

Yan Li1, Lei Tao1, Zeping Zuo1

  • 1State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, and Collaborative Innovation Center for Biotherapy, Sichuan University, Chengdu, 610041, China.

Cancer Letters
|April 13, 2019
PubMed

Insights

A novel drug, ZY0511, effectively inhibits lysine-specific demethylase 1 (LSD1) and cancer cell growth. It works by increasing DDIT4, a suppressor of mTORC1, showing therapeutic potential for solid tumors.

Area of Science:

  • Oncology
  • Molecular Biology
  • Epigenetics

Background:

  • Lysine-specific demethylase 1 (LSD1) is implicated in cancer development but its mechanisms are not fully understood.
  • There is a need for more effective LSD1 inhibitors for cancer therapy.
  • Understanding LSD1's role in oncogenesis is crucial for targeted treatment strategies.

Purpose of the Study:

  • To investigate the biological activity of a novel LSD1 inhibitor, ZY0511.
  • To elucidate the mechanism of action of ZY0511 in cancer cells.
  • To evaluate the therapeutic potential of ZY0511 in preclinical models.

Main Methods:

  • Assessed LSD1 inhibition and cancer cell proliferation in vitro.
  • Utilized ChIP-PCR to confirm DDIT4 as a direct downstream target of LSD1.
  • Investigated the effect of ZY0511 on histone methylation and mTORC1 activity.
  • Evaluated ZY0511 efficacy and toxicity in mouse xenograft models.

Main Results:

  • ZY0511 specifically inhibited LSD1 activity and proliferation in various cancer cells, notably HeLa and HCT116.
  • ZY0511 upregulated DDIT4 expression by altering histone H3K4 methylation at the DDIT4 promoter, suppressing mTORC1.
  • Knockdown of DDIT4 diminished ZY0511's anti-cancer effects.
  • ZY0511 treatment significantly inhibited tumor growth in xenograft models with no detectable toxicity.
  • DDIT4 expression correlated with sensitivity to chemotherapy.

Conclusions:

  • ZY0511 demonstrates significant therapeutic potential for solid tumors by inhibiting LSD1 and modulating the DDIT4/mTORC1 pathway.
  • The induction of DDIT4 by ZY0511 offers a potential predictive biomarker for LSD1 inhibitor efficacy.
  • Further research into ZY0511 and its downstream effects could lead to novel cancer treatments.
Keywords:
Cervical cancerChemotherapy sensitivityColorectal cancerH3K4 methylation

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