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Polyisoprenylated methylated protein methyl esterase overexpression and hyperactivity promotes lung cancer

Felix Amissah1, Randolph Duverna1, Byron J Aguilar1

  • 1College of Pharmacy and Pharmaceutical Sciences, Florida A&M University Tallahassee, Florida 32307, USA.

American Journal of Cancer Research
|March 25, 2014
PubMed

Insights

Polyisoprenylated methylated protein methyl esterase (PMPMEase) is overexpressed and highly active in lung cancer. Inhibiting PMPMEase with L-28 drug causes cancer cell death and reduces migration, suggesting its potential as a lung cancer biomarker and drug target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Hyperactive polyisoprenylated proteins are implicated in cancer development.
  • Polyisoprenylated methylated protein methyl esterase (PMPMEase) regulates polyisoprenylated protein function.
  • Targeting PMPMEase is a potential therapeutic strategy for cancers where it is overexpressed or hyperactive.

Purpose of the Study:

  • To investigate PMPMEase expression and activity in lung cancer.
  • To evaluate the efficacy of PMPMEase inhibition as a potential lung cancer treatment.
  • To explore PMPMEase as a potential diagnostic biomarker for lung cancer.

Main Methods:

  • PMPMEase activity assays in lung cancer cell lines (A549, H460) and normal lung fibroblasts.
  • Quantitative analysis of PMPMEase expression in lung cancer tissues using tissue microarrays.
  • In vitro treatment of lung cancer cells with a specific PMPMEase inhibitor (L-28).
  • Assessment of cell viability, migration, and gene transcription following PMPMEase inhibition.

Main Results:

  • PMPMEase was significantly overexpressed and more active in lung cancer cells and tissues compared to normal controls.
  • Treatment with L-28 induced concentration-dependent cell death in lung cancer cells.
  • PMPMEase inhibition disrupted actin assembly, reduced cell migration, and altered cancer-related gene expression.

Conclusions:

  • Elevated PMPMEase activity contributes to lung cancer cell growth and migration.
  • PMPMEase is a promising therapeutic target for lung cancer.
  • PMPMEase shows potential as a protein biomarker for lung cancer diagnosis and prognosis.
Keywords:
PolyisoprenylationRasesteraseisoprenylationlung cancermethylationmonomeric G-proteinsnanostring

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