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HSP27 regulates viability and migration of cancer cell lines following irradiation

Benjamin Philipp Ernst1, Nadine Wiesmann1, Rita Gieringer1

  • 1Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany.

Journal of Proteomics
|July 5, 2020
PubMed

Insights

Combining radiotherapy with targeted therapies, specifically inhibiting heat shock protein 27 (HSP27) phosphorylation, shows promise in overcoming cancer treatment resistance and reducing cell viability and migration.

Area of Science:

  • Oncology
  • Molecular Biology
  • Radiotherapy

Background:

  • Cancer treatment resistance limits radiotherapy efficacy.
  • Targeted therapies combined with irradiation present a promising strategy.
  • Heat shock protein 27 (HSP27) is identified as a potential therapeutic target.

Purpose of the Study:

  • To investigate the role of HSP27 in lung and head and neck cancer.
  • To evaluate the combined effect of radiotherapy and HSP27 inhibition on cancer cells.
  • To assess the impact on cell viability and migration.

Main Methods:

  • Proteomic screening of lung and head and neck cancer cell lines.
  • Treatment with irradiation and a heat shock protein 27 (HSP27) phosphorylation inhibitor (MKII).
  • Assessment of cell viability, migration, and HSP27 phosphorylation levels.
  • HSP27 knockdown experiments.

Main Results:

  • Irradiation and MKII inhibition significantly reduced viability in both cell lines.
  • MKII inhibition reduced migration in both cell lines, while irradiation only affected one.
  • HSP27 knockdown compromised viability only in A549 cells.
  • MKII inhibition counteracted radiation-induced HSP27 phosphorylation, leading to additive toxicity and reduced migration in HNSCCUM-02T cells.

Conclusions:

  • Combined inhibition of HSP27 expression/phosphorylation with radiotherapy may overcome treatment resistance.
  • Targeting HSP27 offers a potential strategy to enhance radiotherapy outcomes.
  • Further research into HSP27 as a therapeutic target in combined cancer treatment is warranted.

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