Polymeric Engineering of Nanoparticles for Highly Efficient Multifunctional Drug Delivery Systems.

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Materials Science

Background:

• Anticancer drug delivery systems (DDSs) often fail due to entrapment in cellular vesicles, limiting drug bioavailability.
• Overcoming endosomal entrapment is critical for enhancing DDS therapeutic performance and enabling lower drug doses.

Purpose of the Study:

• To develop a multifunctional DDS with enhanced cancer cell targeting and endosomal escape capabilities.
• To improve the therapeutic efficacy of anticancer drugs by overcoming intracellular delivery barriers.

Main Methods:

• Mesoporous silica nanoparticles loaded with doxorubicin were functionalized with polyethylenimine (PEI) and hyaluronic acid (HA).
• HA provided CD44 receptor targeting for cancer cells, while PEI facilitated endosomal escape.
• The DDS's ability to escape the endosomal pathway and its cytotoxicity were evaluated.

Main Results:

• The developed multifunctional DDS demonstrated effective escape from the endosomal pathway.
• The combination of HA and PEI resulted in superior endosomal escape efficiency compared to PEI alone.
• The engineered DDS exhibited high specificity towards cancer cells and cytotoxicity comparable to free doxorubicin.

Conclusions:

• Polymeric functionalization of DDSs can overcome endosomal entrapment, a major limitation in drug delivery.
• This multifunctional DDS offers enhanced anticancer therapeutic potential with improved specificity and efficacy at low drug doses.