Functional nanosome for enhanced mitochondria-targeted gene delivery and expression

Area of Science:

• Biomedical Engineering
• Cell Biology
• Nanotechnology

Background:

• Mitochondrial dysfunction is implicated in numerous human diseases.
• Effective therapeutic strategies necessitate advanced delivery systems capable of targeting mitochondria.
• Current delivery vectors often lack specificity and efficient mitochondrial penetration.

Purpose of the Study:

• To develop and evaluate a novel nanosome, DQA80s (dequalinium-DOTAP-DOPE), as a mitochondria-targeting delivery vector.
• To assess the efficacy of DQA80s in delivering genetic material to mitochondria in living cells.
• To investigate the potential of DQA80s for therapeutic applications in mitochondrial diseases.

Main Methods:

• Synthesis and characterization of DQA80s nanosomes.
• Transfection efficiency assays in HeLa cells and dermal fibroblasts.
• Endosomal escape studies.
• Mitochondrial delivery confirmation using flow cytometry, confocal microscopy, and TME imaging.
• Assessment of mitochondrial membrane potential using specific probes.

Main Results:

• DQA80s demonstrated superior transfection efficiency compared to control DQAsomes.
• DQA80s/pDNA complexes facilitated rapid endosomal escape into the cytosol.
• Successful delivery of pDNA to mitochondria was confirmed in living cells.
• DQAsomes and DQA80s induced mitochondrial dysfunction via membrane potential depolarization.

Conclusions:

• DQA80s represent a promising nanosome-based delivery system for mitochondria.
• The enhanced transfection and mitochondrial targeting capabilities of DQA80s offer potential for treating mitochondrial disorders.
• Further in vivo studies are warranted to validate the therapeutic potential of DQA80s.