Extracellular barriers in respiratory gene therapy

Area of Science:

• Pulmonary Medicine
• Gene Therapy
• Nanotechnology

Background:

• Gene therapy offers potential for treating diverse pulmonary disorders.
• Respiratory secretions, including mucus and alveolar fluid, present a significant barrier to effective gene delivery.
• Nucleic acid-containing nanoparticles (NANs) are a key modality for gene therapy, but their pulmonary delivery is impeded by physiological secretions.

Purpose of the Study:

• To elucidate the biophysical properties of respiratory secretions.
• To understand the mechanisms by which mucus and alveolar fluid impede gene transfer efficiency of NANs.
• To review current and novel strategies for overcoming the inhibitory effects of respiratory secretions on pulmonary gene delivery.

Main Methods:

• Review of existing literature on the biophysical properties of respiratory mucus and alveolar fluid.
• Analysis of studies investigating the interaction between NANs and respiratory secretions.
• Synthesis of research on strategies designed to enhance pulmonary gene delivery in the presence of physiological barriers.

Main Results:

• Respiratory secretions possess specific biophysical characteristics that hinder NANs' ability to reach target cells.
• Understanding these properties is crucial for designing effective gene therapy vectors.
• Various strategies have been developed to mitigate the barrier effects of respiratory secretions.

Conclusions:

• Overcoming the barrier posed by respiratory secretions is essential for successful pulmonary gene therapy.
• Further research into NANs and delivery strategies tailored to the lung environment is warranted.
• This review provides insights into current challenges and future directions for respiratory gene therapy.