Selective activation of PFKL suppresses the phagocytic oxidative burst

Cell. 2021 Aug 19;184(17):4480-4494.e15. doi: 10.1016/j.cell.2021.07.004. Epub 2021 Jul 27.

Abstract

In neutrophils, nicotinamide adenine dinucleotide phosphate (NADPH) generated via the pentose phosphate pathway fuels NADPH oxidase NOX2 to produce reactive oxygen species for killing invading pathogens. However, excessive NOX2 activity can exacerbate inflammation, as in acute respiratory distress syndrome (ARDS). Here, we use two unbiased chemical proteomic strategies to show that small-molecule LDC7559, or a more potent designed analog NA-11, inhibits the NOX2-dependent oxidative burst in neutrophils by activating the glycolytic enzyme phosphofructokinase-1 liver type (PFKL) and dampening flux through the pentose phosphate pathway. Accordingly, neutrophils treated with NA-11 had reduced NOX2-dependent outputs, including neutrophil cell death (NETosis) and tissue damage. A high-resolution structure of PFKL confirmed binding of NA-11 to the AMP/ADP allosteric activation site and explained why NA-11 failed to agonize phosphofructokinase-1 platelet type (PFKP) or muscle type (PFKM). Thus, NA-11 represents a tool for selective activation of PFKL, the main phosphofructokinase-1 isoform expressed in immune cells.

Keywords: LDC7559; NA-11; NADPH; NETosis; NOX2; PFKL; ROS; neutrophils.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine Diphosphate / metabolism
  • Adenosine Monophosphate / metabolism
  • Allosteric Regulation / drug effects
  • Enzyme Activation / drug effects
  • Epithelial Cells / drug effects
  • Epithelial Cells / metabolism
  • Glycolysis / drug effects
  • Humans
  • Intracellular Signaling Peptides and Proteins / metabolism
  • Kinetics
  • Microbial Viability / drug effects
  • Models, Molecular
  • NADPH Oxidases / metabolism
  • Neutrophils / drug effects
  • Neutrophils / metabolism
  • Phagocytosis* / drug effects
  • Phosphate-Binding Proteins / metabolism
  • Phosphofructokinase-1, Liver Type / antagonists & inhibitors
  • Phosphofructokinase-1, Liver Type / metabolism*
  • Phosphofructokinase-1, Liver Type / ultrastructure
  • Protein Kinase Inhibitors / chemistry
  • Protein Kinase Inhibitors / pharmacology
  • Recombinant Proteins / isolation & purification
  • Respiratory Burst* / drug effects
  • Tetradecanoylphorbol Acetate / pharmacology

Substances

  • GSDMD protein, human
  • Intracellular Signaling Peptides and Proteins
  • Phosphate-Binding Proteins
  • Protein Kinase Inhibitors
  • Recombinant Proteins
  • Adenosine Monophosphate
  • Adenosine Diphosphate
  • NADPH Oxidases
  • Phosphofructokinase-1, Liver Type
  • Tetradecanoylphorbol Acetate