Nanoformulated ABT-199 to effectively target Bcl-2 at mitochondrial membrane alleviates airway inflammation by inducing apoptosis

Biomaterials. 2019 Feb:192:429-439. doi: 10.1016/j.biomaterials.2018.06.020. Epub 2018 Jun 18.

Abstract

Elimination of airway inflammatory cells is essential for asthma control. As Bcl-2 protein is highly expressed on the mitochondrial outer membrane in inflammatory cells, we chose a Bcl-2 inhibitor, ABT-199, which can inhibit airway inflammation and airway hyperresponsiveness by inducing inflammatory cell apoptosis. Herein, we synthesized a pH-sensitive nanoformulated Bcl-2 inhibitor (Nf-ABT-199) that could specifically deliver ABT-199 to the mitochondria of bronchial inflammatory cells. The proof-of-concept study of an inflammatory cell mitochondria-targeted therapy using Nf-ABT-199 was validated in a mouse model of allergic asthma. Nf-ABT-199 was proven to significantly alleviate airway inflammation by effectively inducing eosinophil apoptosis and inhibiting both inflammatory cell infiltration and mucus hypersecretion. In addition, the nanocarrier or Nf-ABT-199 showed no obvious influence on cell viability, airway epithelial barrier and liver function, implying excellent biocompatibility and with non-toxic effect. The nanoformulated Bcl-2 inhibitor Nf-ABT-199 accumulates in the mitochondria of inflammatory cells and efficiently alleviates allergic asthma.

Keywords: ABT-199; Allergic airway inflammation; Bcl-2; Mitochondria; Nanotechnology; Targeted drug delivery.

Publication types

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

MeSH terms

  • Animals
  • Apoptosis / drug effects*
  • Asthma / drug therapy*
  • Bridged Bicyclo Compounds, Heterocyclic / administration & dosage*
  • Bridged Bicyclo Compounds, Heterocyclic / therapeutic use
  • Cell Line
  • Drug Delivery Systems*
  • Hypersensitivity / drug therapy
  • Inflammation / drug therapy*
  • Mice
  • Mitochondrial Membranes / drug effects
  • Proto-Oncogene Proteins c-bcl-2 / antagonists & inhibitors*
  • Sulfonamides / administration & dosage*
  • Sulfonamides / therapeutic use

Substances

  • Bridged Bicyclo Compounds, Heterocyclic
  • Proto-Oncogene Proteins c-bcl-2
  • Sulfonamides
  • venetoclax