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The Phenoxyphenol Compound 4-HPPP Selectively Induces Antiproliferation Effects and Apoptosis in Human Lung Cancer

Wangta Liu1,2, Chang-Yi Wu1,3, Mei-Jei Lu1

  • 1Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 807, Taiwan.

Oxidative Medicine and Cellular Longevity
|February 25, 2020
PubMed

Insights

This study shows that 4-[4-(4-hydroxyphenoxy)phenoxy]phenol (4-HPPP) selectively kills non-small-cell lung cancer (NSCLC) cells by increasing reactive oxygen species (ROS) and DNA damage. 4-HPPP may be a potential new treatment for NSCLC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Non-small-cell lung cancer (NSCLC) is a major cause of cancer mortality with poor patient survival rates.
  • 4-[4-(4-hydroxyphenoxy)phenoxy]phenol (4-HPPP), a phenoxyphenol, has previously demonstrated anti-cancer effects in liver cancer cells.

Purpose of the Study:

  • To investigate the anti-cancer effects of 4-HPPP and its analogs on NSCLC cells.
  • To elucidate the mechanisms underlying 4-HPPP's action in NSCLC.

Main Methods:

  • Colony formation assays and *in vivo* zebrafish xenograft models were used to assess cytotoxicity, proliferation, and migration.
  • Flow cytometry (DCF-DA) and Western blotting were employed to analyze reactive oxygen species (ROS) levels and related enzyme expression.
  • Analysis of DNA damage markers, including aneuploidization, *γ*H2AX, and double-strand break (DSB) pathway activation (ATR).

Main Results:

  • 4-HPPP exhibited selective cytotoxicity against NSCLC H1299 cells, inhibiting proliferation and migration.
  • 4-HPPP induced ROS production in NSCLC cells, with increased superoxide dismutases (SODs) 1/2 and decreased peroxidase (PRX).
  • 4-HPPP caused DNA damage, evidenced by aneuploidization, *γ*H2AX accumulation, and activation of the ATR pathway.

Conclusions:

  • The antiproliferative effects of 4-HPPP in NSCLC are linked to its phenoxyphenol structure.
  • 4-HPPP demonstrates potential as a therapeutic candidate for NSCLC by modulating ROS and promoting polyploidy-specific cell death.

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