Abstract
Background: The recent trend of herbal drug delivery has been focused on developing
novel drug delivery carriers to address problems related to solubility, oral bioavailability, skin permeation
and stability. The phyto-phospholipid complex (phytosomes®) technology has been used to
overcome the problems associated with many conventional herbal extracts.
Aim: The present work aimed to formulate phospholipid-complex of the flavanoid Hesperidin to
enhance its dissolution leading to enhanced oral bioavailability.
Method: The complex was prepared by refluxing various molar ratios of hesperidin and PC followed
by solvent evaporation. The prepared complexes were evaluated for saturation solubility,
partition co-efficient and drug content. The free drug and phospholipid complexes were analyzed in
DSC. Surface morphology of the prepared complexes was viewed using SEM images. Selected
formulations were subjected to in vitro drug release study. Antioxidant effect was examined by free
radical scavenging method.
Results: Solubility and partition coefficient of the prepared complexes were improved in comparison
to free drug. Based on the results of solubility, partition coefficient and drug content, formulation
F2 was selected as an optimized batch. DSC thermograms confirmed the formation of phospholipid
complex. Free Hesperidin and Hesperidin-phospholipid complex (F2) showed 46.9 % and
78.20 % of drug release, respectively, at seven hours phosphate buffer (pH 7.4). The optimized
formulation showed concentration-dependent anti-oxidant property.
Conclusion: Results of the present study suggested that the phospholipid complex of Hesperidin
possesses the antioxidant potential and may be of potential use for improving the dissolution of
hesperidin and hence oral bioavailability.
Keywords:
Hesperidin, phospholipid complex, phytosomes, herbosomes, solubility, antioxidant.
Graphical Abstract
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