Accessing Intracellular Targets through Nanocarrier-Mediated Cytosolic Protein Delivery

Area of Science:

• Biotechnology
• Cell Biology
• Drug Delivery

Background:

• Protein therapeutics offer high specificity, potency, and low toxicity.
• Intracellular protein applications necessitate cytosol access, which is hindered by cell membrane impermeability.
• Current strategies often rely on endocytic uptake, facing challenges with endosomal escape and cargo degradation.

Purpose of the Study:

• To review existing endosomal escape strategies for intracellular protein delivery.
• To highlight cell membrane fusion as a novel and effective method for direct cytoplasmic protein delivery.

Main Methods:

• Review of current literature on protein delivery strategies.
• Analysis of cell membrane fusion as a direct protein delivery mechanism.

Main Results:

• Endosomal escape strategies often suffer from low efficiency and cargo degradation.
• Cell membrane fusion provides a direct route for proteins into the cytoplasm, bypassing endosomal compartments.

Conclusions:

• Cell membrane fusion represents a significant advancement in overcoming barriers to intracellular protein delivery.
• This strategy holds potential for improving the efficacy of protein-based therapeutics.