Binary Pluronics based mixed micellar systems: Effective solution for improved solubilization of Biochanin A

Area of Science:

• Materials Science
• Pharmaceutical Sciences
• Drug Delivery

Background:

• Biochanin A (BCA) is a natural hydrophobic drug with limited bioavailability due to poor solubility.
• Pluronic block copolymers form micelles that can encapsulate hydrophobic compounds, but their efficiency varies.
• Binary mixed micelles (MMs) may offer improved solubilization capabilities compared to pure Pluronic systems.

Purpose of the Study:

• To evaluate the solubilization efficiency of pure Pluronics (P84, P123, F127) and their binary mixed micelles for Biochanin A (BCA).
• To investigate the interaction between BCA and different Pluronic micellar systems.
• To assess the drug release profile of BCA from the developed formulations.

Main Methods:

• Solubilization studies using UV-visible spectrophotometry.
• Determination of critical micelle concentration (CMC) for pure and mixed micelles.
• Interaction analysis using Differential Pulse Voltammetry (DPV).
• Hydrodynamic diameter measurements using dynamic light scattering.
• In vitro drug release studies.

Main Results:

• Binary mixed micelles (P84-P123 and F127-P123) exhibited significantly lower CMCs than pure Pluronics.
• Enhanced BCA solubility was observed in P84-P123 (1:2) MMs (3.51 mg/mL) and F127-P123 (1:2) MMs (2.94 mg/mL) compared to pure Pluronics.
• P84-P123 (1:2) MMs showed superior binding affinity (Ka = 2.60 × 10^5 M^-1) for BCA compared to pure P84.
• BCA loading increased the hydrodynamic diameter of P84-P123 (1:2) micelles.
• MMs demonstrated a sustained release of BCA compared to pure Pluronics.

Conclusions:

• P84-P123 (1:2) mixed micelles are superior solubilizers for Biochanin A compared to pure Pluronics and other tested MMs.
• The enhanced solubilization and controlled release properties of these MMs hold significant potential for developing advanced drug delivery systems for hydrophobic drugs.
• This study validates the use of binary mixed micelles as an effective strategy for improving the delivery of poorly soluble pharmaceuticals.