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Updated: Nov 10, 2025
Flash NanoPrecipitation for the Encapsulation of Hydrophobic and Hydrophilic Compounds in Polymeric Nanoparticles
Published on: January 7, 2019
Anti-Aβ-scFv-loaded polymeric nano-micelles with enhanced plasma stability
Farnaz Sotoudegan1, Farzaneh Sotoudegan2, Yeganeh Talebkhan Garoosi1
1Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.
Objectives:
Immunotherapy using recombinant monoclonal antibodies specifically Anti-amyloid-beta (Anti-Aβ) scFv is envisaged as an appropriate therapeutic for Alzheimer through reduction of amyloid-beta aggregation. The solubilization of therapeutics using polymeric micelles facilitates an improved bioavailability and extended blood half-life. In this study, the optimum production condition for Anti-amyloid-beta (Anti-Aβ) scFv was obtained. To increase the stability of plasma, Anti-Aβ-loaded polymeric micelles were synthesized.
Methods:
Escherichia coli SHuffle expression strain was used and purified by Ni-NTA. Pluronics P85 and F127 micelles were used for the Anti-Aβ delivery and were characterized in terms of morphology, drug loading and drug release in phosphate buffer and artificial cerebrospinal fluid. The stability profile was quantified at 4°C over a 30 days storage period. The stability in human plasma was also evaluated.
Key Findings:
Proteins expressed in SHuffle resulted in increased levels of protein expression and solubility. Low critical micelle concentration value and high micelle encapsulation efficiency (<200 nm) achieved via direct dissolution method. Anti-Aβ-loaded micelles were around 2.2-fold more stable than Anti-Aβ in plasma solution. A sustained in-vitro release of Anti-Aβ from micelles was observed.
Conclusions:
Results confirmed that Pluronic-micelles pose benefits as a nano-carrier to increase the stability of Anti-Aβ scFvin in the plasma.
