A nuclease that mediates cell death induced by DNA damage and poly(ADP-ribose) polymerase-1

Science. 2016 Oct 7;354(6308):aad6872. doi: 10.1126/science.aad6872.

Abstract

Inhibition or genetic deletion of poly(ADP-ribose) (PAR) polymerase-1 (PARP-1) is protective against toxic insults in many organ systems. The molecular mechanisms underlying PARP-1-dependent cell death involve release of mitochondrial apoptosis-inducing factor (AIF) and its translocation to the nucleus, which results in chromatinolysis. We identified macrophage migration inhibitory factor (MIF) as a PARP-1-dependent AIF-associated nuclease (PAAN). AIF was required for recruitment of MIF to the nucleus, where MIF cleaves genomic DNA into large fragments. Depletion of MIF, disruption of the AIF-MIF interaction, or mutation of glutamic acid at position 22 in the catalytic nuclease domain blocked MIF nuclease activity and inhibited chromatinolysis, cell death induced by glutamate excitotoxicity, and focal stroke. Inhibition of MIF's nuclease activity is a potential therapeutic target for diseases caused by excessive PARP-1 activation.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Active Transport, Cell Nucleus
  • Amino Acid Sequence
  • Animals
  • Apoptosis Inducing Factor / genetics
  • Apoptosis Inducing Factor / metabolism*
  • Apoptosis* / genetics
  • Base Sequence
  • Catalytic Domain
  • Cell Nucleus / enzymology
  • Chromatin / metabolism
  • DNA Cleavage*
  • DNA Damage* / genetics
  • DNA Fragmentation
  • DNA, Single-Stranded / metabolism*
  • Deoxyribonucleases / chemistry
  • Deoxyribonucleases / genetics
  • Deoxyribonucleases / metabolism*
  • Glutamic Acid / chemistry
  • Glutamic Acid / genetics
  • Glutamic Acid / toxicity
  • HeLa Cells
  • Humans
  • Intramolecular Oxidoreductases / chemistry
  • Intramolecular Oxidoreductases / genetics
  • Intramolecular Oxidoreductases / metabolism*
  • Macrophage Migration-Inhibitory Factors / chemistry
  • Macrophage Migration-Inhibitory Factors / genetics
  • Macrophage Migration-Inhibitory Factors / metabolism*
  • Mice
  • Mice, Knockout
  • Mitochondria / enzymology
  • Mutation
  • Neurons / enzymology
  • Nucleic Acid Conformation
  • Oxidative Stress
  • Poly (ADP-Ribose) Polymerase-1 / metabolism*
  • Stroke / enzymology
  • Stroke / genetics

Substances

  • Apoptosis Inducing Factor
  • Chromatin
  • DNA, Single-Stranded
  • Macrophage Migration-Inhibitory Factors
  • Glutamic Acid
  • Poly (ADP-Ribose) Polymerase-1
  • Deoxyribonucleases
  • Intramolecular Oxidoreductases
  • MIF protein, human