Magnetically active pNIPAM nanosystems as temperature-sensitive biocompatible structures for controlled drug delivery

Area of Science:

• Biomaterials Science
• Nanotechnology
• Drug Delivery Systems

Background:

• Colon cancer treatment often involves chemotherapy with drugs like 5-fluorouracil (5FU) and oxaliplatin (OXA).
• Effective delivery of these chemotherapeutics is crucial for maximizing efficacy and minimizing side effects.
• Developing novel nanocarriers can enhance drug targeting and controlled release.

Purpose of the Study:

• To synthesize and investigate temperature-sensitive, magnetically responsive poly(N-isopropylacrylamide) (pNIPAM) nanosystems.
• To evaluate the controlled release of 5-fluorouracil (5FU) and oxaliplatin (OXA) using these nanosystems.
• To assess the biocompatibility and anti-cancer efficacy of the developed nanoformulations against colon cancer cells.

Main Methods:

• Synthesis of magnetic nanoparticles (@Fe3O4) via co-precipitation and functionalization.
• Free radical polymerization to grow thermo-responsive pNIPAM polymer chains.
• Characterization using Transmission Electron Microscopy (TEM), Dynamic Light Scattering (DLS), and Z-potential (ZP).
• Loading of 5FU and OXA, followed by drug release studies and cytotoxicity assays against T-84 colon cancer cells.

Main Results:

• Synthesized hybrid nanoparticles exhibited magnetic response and temperature sensitivity.
• pNIPAM nanoformulations demonstrated high biocompatibility with human blood and cultured cells.
• The pNIPAM@Fe3O4-3BA + 5FU formulation showed significant inhibition of T-84 cell proliferation (57%).
• pNIPAM-co-AL@Fe3O4-AA nanosystems facilitated cell migration under an external magnetic field.

Conclusions:

• The developed hybrid nanoparticles represent a promising biocompatible platform for colon cancer therapy.
• These nanosystems enable controlled delivery of 5FU and OXA, potentially improving treatment outcomes.
• Magnetic targeting offers a strategy for enhancing drug delivery efficiency in cancer treatment.