AAV-delivered muscone-induced transgene system for treating chronic diseases in mice via inhalation

Nat Commun. 2024 Feb 6;15(1):1122. doi: 10.1038/s41467-024-45383-z.

Abstract

Gene therapies provide treatment options for many diseases, but the safe and long-term control of therapeutic transgene expression remains a primary issue for clinical applications. Here, we develop a muscone-induced transgene system packaged into adeno-associated virus (AAV) vectors (AAVMUSE) based on a G protein-coupled murine olfactory receptor (MOR215-1) and a synthetic cAMP-responsive promoter (PCRE). Upon exposure to the trigger, muscone binds to MOR215-1 and activates the cAMP signaling pathway to initiate transgene expression. AAVMUSE enables remote, muscone dose- and exposure-time-dependent control of luciferase expression in the livers or lungs of mice for at least 20 weeks. Moreover, we apply this AAVMUSE to treat two chronic inflammatory diseases: nonalcoholic fatty liver disease (NAFLD) and allergic asthma, showing that inhalation of muscone-after only one injection of AAVMUSE-can achieve long-term controllable expression of therapeutic proteins (ΔhFGF21 or ΔmIL-4). Our odorant-molecule-controlled system can advance gene-based precision therapies for human diseases.

MeSH terms

  • Alprostadil* / metabolism
  • Animals
  • Cycloparaffins* / metabolism
  • Dependovirus / genetics
  • Genetic Vectors
  • Humans
  • Mice
  • Odorants
  • Receptors, G-Protein-Coupled / metabolism
  • Transgenes

Substances

  • muscone
  • Alprostadil
  • Cycloparaffins
  • Receptors, G-Protein-Coupled