• Bharathi Sambandam Centre for Nanoscience and Technology Anna University Chennai
  • Sathesh Kumar S Department of Pharmaceutics School of Pharmaceutical Sciences VELS University, Chennai.
  • Arivarasan Ayyaswamy Centre for Nanoscience and Technology Anna University Chennai
  • Nagarjuna Yadav B V Department of Pharmaceutics School of Pharmaceutical Sciences VELS University, Chennai.
  • Devasena Thiyagarajan Centre for Nanoscience and Technology Anna University Chennai


Quercetin, Nanoprecipitation, PLA nanoparticles, Antioxidant


Objectives: Synthesis and optimization of Poly D-L Lactide (PLA) nanoparticles for the delivery of an antioxidant molecule quercetin.

Methods: The quercetin was encapsulated by PLA nanoparticles by nanoprecipitation method. The average particle size and the electric charge for different formulations were measured by particle size and zeta potential analyzer. The quercetin loaded PLA nanoparticles (Q-PLAN) was characterized by differential scanning calorimetry & Fourier transform-Infra red spectroscopy, Scanning electron microscopy and Atomic force microscopy. The average drug content, encapsulation efficiency and drug release studies were carried out for different formulations of Q-PLAN. The antioxidant activity of the formulated Q-PLAN nanoparticles was tested using DPPH assay.

Results: The formulation F3 (Quercetin 75 mg: PLA 200 mg) was found to be optimized formulation based on particle size analysis, Zeta potential, drug content, encapsulation efficiency and drug release studies. The mean diameter and zeta potential of optimized Q-PLAN and PLA nanoparticles were found to be 242±20 nm, 185±10 nm and-22.5±1.5 mV,-20.5±1.0 mV. The F3 formulation showed encapsulation efficiency of 73.3% and 5.5±0.06 mg/ml of actual drug loading. The F3 formulations showed 99.7% of drug release. The optimized Q-PLAN showed better scavenging effects when compared to the free quercetin.

Conclusions: The poor aqueous solubility and stability of the antioxidant molecule quercetin have been improved by entrapping the quercetin molecules into the PLA nanoparticles.



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Author Biographies

Bharathi Sambandam, Centre for Nanoscience and Technology Anna University Chennai

Centre for Nanoscience and Technology

Sathesh Kumar S, Department of Pharmaceutics School of Pharmaceutical Sciences VELS University, Chennai.

Department of Pharmaceutics

Arivarasan Ayyaswamy, Centre for Nanoscience and Technology Anna University Chennai

Centre for Nanoscience and Technology

Nagarjuna Yadav B V, Department of Pharmaceutics School of Pharmaceutical Sciences VELS University, Chennai.

Department of Pharmaceutics

Devasena Thiyagarajan, Centre for Nanoscience and Technology Anna University Chennai

Centre for Nanoscience and Technology


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How to Cite

Sambandam, B., S. K. S, A. Ayyaswamy, N. Y. B V, and D. Thiyagarajan. “SYNTHESIS AND CHARACTERIZATION OF POLY D-L LACTIDE (PLA) NANOPARTICLES FOR THE DELIVERY OF QUERCETIN”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 7, no. 5, May 2015, pp. 42-49,



Original Article(s)