Spontaneous temperature-sensitive Pluronic(®) based niosomes: Triggered drug release using mild hyperthermia.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Drug Delivery Systems

Background:

• Thermo-sensitive carriers are crucial for hyperthermia-induced drug release in tumor therapy.
• Existing thermo-sensitive carriers often face premature clearance from circulation.
• Novel materials are needed to overcome limitations of current drug delivery systems.

Purpose of the Study:

• To develop multifunctional niosomes with spontaneous stealth and thermo-sensitive properties.
• To utilize L64 Pluronic® and its derivative for creating biocompatible and efficient drug carriers.
• To investigate the drug release characteristics of these niosomes at different temperatures.

Main Methods:

• Synthesis of niosomes using L64 Pluronic® and L64ox, with or without cholesterol.
• Characterization of niosome size, stability, and surface charge (Z-potential).
• In vitro drug release studies of Calcein and 5-FU at 25°C, 37°C, and 42°C.

Main Results:

• Niosomes exhibited diameters ranging from 400 to 750nm and demonstrated long-term stability.
• Calcein and 5-FU showed high affinity for the PEO-rich niosomal matrices.
• Drug release was significantly more pronounced at 42°C compared to 25°C and 37°C, indicating thermo-sensitivity.

Conclusions:

• L64-based niosomes possess inherent thermo-sensitive properties, releasing drugs more effectively at mild hyperthermia temperatures.
• These niosomes offer spontaneous stealth characteristics, potentially improving circulation time.
• The developed multifunctional niosomes represent a promising advancement for targeted and efficient pharmacological therapy.