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PLA2R1: expression and function in cancer

David Bernard1, David Vindrieux1

  • 1INSERM U1052, Centre de Recherche en Cancérologie de Lyon, Lyon F-69373, France; CNRS UMR 5286, Lyon F-69373, France; Centre Léon Bérard, Lyon F-69373, France; Université de Lyon, Lyon F-69373, France.

Biochimica Et Biophysica Acta
|March 27, 2014
PubMed

Insights

The phospholipase A2 receptor 1 (PLA2R1) unexpectedly acts as a tumor suppressor. Its reduced expression in cancers suggests a novel role in inhibiting tumor growth through senescence and apoptosis.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Phospholipase A2 receptor 1 (PLA2R1) was initially identified for binding secretory phospholipase A2 (sPLA2) proteins.
  • Its role was primarily confined to regulating sPLA2 activities, with limited exploration in other biological contexts.

Purpose of the Study:

  • To investigate the novel functions of PLA2R1 in cancer biology.
  • To highlight its emerging role as a tumor suppressor.

Main Methods:

  • In vitro and in vivo gain and loss of function experiments.
  • Analysis of PLA2R1 expression levels in various cancer types.
  • Investigation of epigenetic regulation (promoter methylation) and oncogene-driven repression.
  • Exploration of downstream signaling pathways, including JAK2 activation and reactive oxygen species (ROS) generation.

Main Results:

  • PLA2R1 promotes tumor suppressive responses such as senescence, apoptosis, and inhibition of cellular transformation.
  • PLA2R1 expression is downregulated in numerous cancers.
  • Oncogenes like HIF2α and c-MYC repress PLA2R1 expression.
  • PLA2R1 promoter methylation is observed in leukemia, kidney, and breast cancers.
  • PLA2R1 activates JAK2 kinase towards a tumor-suppressive function and induces ROS accumulation.

Conclusions:

  • PLA2R1 exhibits a significant, previously unrecognized tumor suppressive role in cancer.
  • Further research is needed to fully elucidate the mechanisms and therapeutic potential of PLA2R1 in oncology.
Keywords:
ApoptosisCancerMethylationPLA2R1Senescencec-MYC

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