The hypermorphic PLCγ2 S707Y variant dysregulates microglial cell function – Insight into PLCγ2 activation in brain health and disease, and opportunities for therapeutic modulation

Dec 7, 2023Biochimica et biophysica acta. Molecular basis of disease

The overactive PLCγ2 S707Y variant disrupts brain immune cell function and suggests ways to affect brain health and disease

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Abstract

PLCγ2 S707Y expressing human microglia show diminished functionality for key processes despite increased enzymatic activity.

  • Hypermorphic PLCγ2 S707Y variant leads to increased enzymatic activity in microglia compared to wild type.
  • Functional impairments are noted in essential processes such as phagocytosis and cytokine secretion during inflammation.
  • RNA sequencing shows downregulation of genes associated with innate immunity and inflammatory responses.
  • Chronic activation of PLCγ2 may contribute to negative effects on central nervous system functions.
  • Therapeutic strategies targeting PLCγ2 should aim to replicate the beneficial effects of the PLCγ2 P522R variant.

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