Inhibition of amyloidogenesis by nonsteroidal anti-inflammatory drugs and their hybrid nitrates

J Med Chem. 2011 Apr 14;54(7):2293-306. doi: 10.1021/jm101450p. Epub 2011 Mar 15.

Abstract

Poor blood-brain barrier penetration of nonsteroidal anti-inflammatory drugs (NSAIDs) has been blamed for the failure of the selective amyloid lowering agent (SALA) R-flurbiprofen in phase 3 clinical trials for Alzheimer's disease (AD). NO-donor NSAIDs (NO-NSAIDs) provide an alternative, gastric-sparing approach to NSAID SALAs, which may improve bioavailability. NSAID analogues were studied for anti-inflammatory activity and for SALA activity in N2a neuronal cells transfected with human amyloid precursor protein (APP). Flurbiprofen (1) analogues were obtained with enhanced anti-inflammatory and antiamyloidogenic properties compared to 1, however, esterification led to elevated Aβ(1-42) levels. Hybrid nitrate prodrugs possessed superior anti-inflammatory activity and reduced toxicity relative to the parent NSAIDs, including clinical candidate CHF5074. Although hybrid nitrates elevated Aβ(1-42) at higher concentration, SALA activity was observed at low concentrations (≤1 μM): both Aβ(1-42) and the ratio of Aβ(1-42)/Aβ(1-40) were lowered. This biphasic SALA activity was attributed to the intact nitrate drug. For several compounds, the selective modulation of amyloidogenesis was tested using an immunoprecipitation MALDI-TOF approach. These data support the development of NO-NSAIDs as an alternative approach toward a clinically useful SALA.

Publication types

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

MeSH terms

  • Amyloid beta-Peptides / chemistry
  • Amyloid beta-Peptides / metabolism*
  • Amyloidosis / drug therapy
  • Animals
  • Anti-Inflammatory Agents / chemical synthesis
  • Anti-Inflammatory Agents / chemistry
  • Anti-Inflammatory Agents / pharmacology
  • Anti-Inflammatory Agents / toxicity
  • Anti-Inflammatory Agents, Non-Steroidal / chemical synthesis
  • Anti-Inflammatory Agents, Non-Steroidal / chemistry*
  • Anti-Inflammatory Agents, Non-Steroidal / pharmacology*
  • Anti-Inflammatory Agents, Non-Steroidal / toxicity
  • Cell Line, Tumor
  • Humans
  • Mice
  • Neurons / drug effects
  • Neurons / metabolism
  • Nitrates / chemistry*
  • Small Molecule Libraries / chemical synthesis
  • Small Molecule Libraries / chemistry
  • Small Molecule Libraries / pharmacology
  • Small Molecule Libraries / toxicity

Substances

  • Amyloid beta-Peptides
  • Anti-Inflammatory Agents
  • Anti-Inflammatory Agents, Non-Steroidal
  • Nitrates
  • Small Molecule Libraries