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Sunderland Repository records the research produced by the University of Sunderland including practice-based research and theses.

Preparation and in vivo evaluation of insulin-loaded biodegradable nanoparticles prepared from diblock copolymers of PLGA and PEG

Haggag, Yusuf, Abdel-Wahab, Yasser, Ojo, Opeolu, Osman, Mohamed, El-Gizawy, Sanaa, El-Tanani, Mohamed, Faheem, Ahmed and McCarron, Paul (2016) Preparation and in vivo evaluation of insulin-loaded biodegradable nanoparticles prepared from diblock copolymers of PLGA and PEG. International Journal of Pharmaceutics, 499 (1-2). pp. 236-246. ISSN 0378-5173

Item Type: Article


The aim of this study was to design a controlled release vehicle for insulin to preserve its stability and biological activity during fabrication and release. A modified, double emulsion, solvent evaporation, technique using homogenisation force optimised entrapment efficiency of insulin into biodegradable nanoparticles (NP) prepared from poly (dl-lactic-co-glycolic acid) (PLGA) and its PEGylated diblock copolymers. Formulation parameters (type of polymer and its concentration, stabiliser concentration and volume of internal aqueous phase) and physicochemical characteristics (size, zeta potential, encapsulation efficiency, in vitro release profiles and in vitro stability) were investigated. In vivo insulin sensitivity was tested by diet-induced type II diabetic mice. Bioactivity of insulin was studied using Swiss TO mice with streptozotocin-induced type I diabetic profile. Insulin-loaded NP were spherical and negatively charged with an average diameter of 200–400 nm. Insulin encapsulation efficiency increased significantly with increasing ratio of co-polymeric PEG. The internal aqueous phase volume had a significant impact on encapsulation efficiency, initial burst release and NP size. Optimised insulin NP formulated from 10% PEG–PLGA retained insulin integrity in vitro, insulin sensitivity in vivo and induced a sustained hypoglycaemic effect from 3 h to 6 days in type I diabetic mice.

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Depositing User: Barry Hall


Item ID: 6768
Identification Number:
ISSN: 0378-5173
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Catalogue record

Date Deposited: 31 Oct 2016 15:32
Last Modified: 30 Sep 2020 10:45


Author: Yusuf Haggag
Author: Yasser Abdel-Wahab
Author: Opeolu Ojo
Author: Mohamed Osman
Author: Sanaa El-Gizawy
Author: Mohamed El-Tanani
Author: Ahmed Faheem
Author: Paul McCarron

University Divisions

Faculty of Health Sciences and Wellbeing
Faculty of Health Sciences and Wellbeing > School of Pharmacy and Pharmaceutical Sciences


Sciences > Pharmacy and Pharmacology

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