Smart Carriers for Controlled Drug Delivery: Thermosensitive Polymers Embedded in Ordered Mesoporous Carbon

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Developing efficient drug delivery systems is crucial for targeted and controlled therapeutic interventions.
• Ordered mesoporous carbon (CMK3) offers a high surface area for drug loading.
• Thermosensitive polymers, like poly(N-isopropylacrylamide) (PNIPAAm), enable stimulus-responsive drug release.

Purpose of the Study:

• To synthesize and characterize a novel composite drug carrier combining CMK3 and PNIPAAm.
• To evaluate the drug loading and release characteristics of the composite material.
• To investigate the influence of polymer chain length on drug delivery performance.

Main Methods:

• Synthesis of CMK3-PNIPAAm composite materials with varying PNIPAAm chain lengths (PNIPAAm-100n and PNIPAAm-400n).
• Characterization using nitrogen adsorption isotherm and scanning electron microscopy.
• Drug loading and release studies using doxorubicin as a model drug.
• Evaluation of thermosensitivity and cytotoxicity.

Main Results:

• Uniform embedding of PNIPAAm-100n, nonuniform embedding of PNIPAAm-400n.
• Reduced ultimate drug loading capacity but significantly improved loading rates and release capacities.
• Thermosensitive drug release observed, with higher release at 37°C compared to 4°C.
• Demonstrated biocompatibility through cytotoxicity tests.

Conclusions:

• The synthesized CMK3-PNIPAAm composite is an efficient carrier for drug loading and release.
• Drug loading and release profiles can be effectively controlled by tailoring the PNIPAAm polymer chain length.
• This composite material shows promise for future biological and therapeutic applications.