Title:Evaluation of Extended-release of Piroxicam-loaded Pectin-zein Hydrogel
Microspheres: In vitro, Ex vivo, and In vivo Studies
Volume: 19
Issue: 10
Author(s): Jamshed Bobokalonov*, Zayniddin Muhidinov, Abubakr Nasriddinov, Abduvaly Jomnurodov, Farangis Khojaeva, Gulnora Komilova, Salomudin Yusufi and LinShu Liu
Affiliation:
- V.I. Nikitin Chemistry Institute of Tajikistan National Academy of Sciences, Dushanbe, Tajikistan
- Avicenna Tajik
State Medical University, Dushanbe, Tajikistan
Keywords:
Pectin, zein, piroxicam, extended-release, IVIVC, ex vivo-in vivo correlation.
Abstract:
Objective: This study evaluated drug delivery systems based on Pectin (P) and Zein (Z) hydrogel
microspheres. Piroxicam (Px) loaded P/Z hydrogel microspheres (P/Z HM) were developed, and
their extended-release pharmacokinetic properties were evaluated.
Methods: Experiments were executed under three different conditions: in vitro, ex vivo, and in vivo.
Then, the in vitro-in vivo correlations (IVIVC) and ex vivo-in vivo correlations (EVIVC) were examined.
Results: Analysis of drug release mechanisms were evaluated by fitting the in vitro data into the Ritger-
Peppas equation, showing the contribution of both polymers’ relaxation and drug diffusion from the
hydrogel microspheres. The fraction absorbed in vivo was determined by the deconvolution of plasma
concentration data using the Loo-Riegelman method. After oral single-dose administration of the two
formulations, their basic independent model parameters were calculated.
Conclusion: P/Z HM had different drug release behaviors in in vitro and in vivo conditions. However,
the ex vivo and in vivo characteristics were similar (R² = 0.99). It seemed reasonable to use the ex vivo
method to predict the in vivo drug absorption behavior during the polymeric drug delivery system developmental
studies. The P/Z HM formulation maintained the drug dose at the colon site for a long
duration and could be applied for delivery of active pharmaceutical and food ingredients to the colon
site.