Discovery of dual inhibitors of the immune cell PI3Ks p110delta and p110gamma: a prototype for new anti-inflammatory drugs

Chem Biol. 2010 Feb 26;17(2):123-34. doi: 10.1016/j.chembiol.2010.01.010.


PI3Kdelta and PI3Kgamma regulate immune cell signaling, while the related PI3Kalpha and PI3Kbeta regulate cell survival and metabolism. Selective inhibitors of PI3Kdelta/gamma represent a potential class of anti-inflammatory agents lacking the antiproliferative effects associated with PI3Kalpha/beta inhibition. Here we report the discovery of PI3Kdelta/gamma inhibitors that display up to 1000-fold selectivity over PI3Kalpha/beta and evaluate these compounds in a high-content inflammation assay using mixtures of primary human cells. We find selective inhibition of only PI3Kdelta is weakly anti-inflammatory, but PI3Kdelta/gamma inhibitors show superior inflammatory marker suppression through suppression of lipopolysaccharide-induced TNFalpha production and T cell activation. Moreover, PI3Kdelta/gamma inhibition yields an anti-inflammatory signature distinct from pan-PI3K inhibition and known anti-inflammatory drugs, yet bears striking similarities to glucocorticoid receptor agonists. These results highlight the potential of selectively designing drugs that target kinases with shared biological function.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Anti-Inflammatory Agents / chemical synthesis
  • Anti-Inflammatory Agents / chemistry*
  • Anti-Inflammatory Agents / pharmacology
  • Cells, Cultured
  • Class I Phosphatidylinositol 3-Kinases
  • Class Ib Phosphatidylinositol 3-Kinase
  • Drug Discovery
  • Enzyme Inhibitors / chemical synthesis
  • Enzyme Inhibitors / chemistry*
  • Enzyme Inhibitors / pharmacology
  • Humans
  • Isoenzymes / antagonists & inhibitors
  • Isoenzymes / metabolism
  • Lipopolysaccharides / toxicity
  • Lymphocyte Activation
  • Phosphatidylinositol 3-Kinases / metabolism
  • Phosphoinositide-3 Kinase Inhibitors*
  • Quinazolinones / chemical synthesis
  • Quinazolinones / chemistry
  • Quinazolinones / pharmacology
  • Signal Transduction
  • Tumor Necrosis Factor-alpha / metabolism


  • Anti-Inflammatory Agents
  • Enzyme Inhibitors
  • Isoenzymes
  • Lipopolysaccharides
  • Phosphoinositide-3 Kinase Inhibitors
  • Quinazolinones
  • Tumor Necrosis Factor-alpha
  • Class I Phosphatidylinositol 3-Kinases
  • Class Ib Phosphatidylinositol 3-Kinase
  • PIK3CD protein, human
  • PIK3CG protein, human