Preparation of solid dispersion systems for enhanced dissolution of poorly water soluble diacerein: In-vitro evaluation, optimization and physiologically based pharmacokinetic modeling

Diacerein (DCN), a BCS II compound, suffers from poor aqueous solubility and limited bioavailability. Solid dispersion systems (SD) of DCN were prepared by solvent evaporation, using hydrophilic polymers. In-vitro dissolution studies were performed and dissolution parameters were evaluated. I-Optima...

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Bibliographic Details
Published in:PloS one 2021-01, Vol.16 (1), p.e0245482-e0245482
Main Authors: Fouad, Shahinaze A, Malaak, Fady A, El-Nabarawi, Mohamed A, Abu Zeid, Khalid, Ghoneim, Amira M
Format: Article
Language:English
Subjects:
Absorption
Anthraquinones - chemistry
Anthraquinones - pharmacokinetics
Arthritis
Bioavailability
Bisphenol A
Chemical precipitation
Chemical properties
Computer and Information Sciences
Crystal structure
Crystallinity
Dispersion
Dissolution
Drug development
Drugs
Engineering and Technology
Fourier transforms
Freeze drying
Geriatrics
Medicine and Health Sciences
Metabolism
Middle age
Modelling
Models, Biological
Optimization
Osteoarthritis
Pharmaceutical research
Pharmaceutical sciences
Pharmacokinetics
Pharmacy
Physical Sciences
Plasma
Polyethylene glycol
Polymers
Production processes
Research and Analysis Methods
Solid dosage forms
Solubility
Spray drying
Variance analysis
Water - chemistry
Water-soluble polymers
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Summary:Diacerein (DCN), a BCS II compound, suffers from poor aqueous solubility and limited bioavailability. Solid dispersion systems (SD) of DCN were prepared by solvent evaporation, using hydrophilic polymers. In-vitro dissolution studies were performed and dissolution parameters were evaluated. I-Optimal factorial design was employed to study the effect of formulation variables (drug:polymer ratio and polymer type) on the measured responses including; drug content (DC) (%), dissolution efficiency at 15 min (DE (15 min)%) and 60 min (DE (60 min)%) and mean dissolution time (MDT) (min). The optimized SD was selected, prepared and evaluated, allowing 10.83 and 3.42 fold increase in DE (15 min)%, DE (60 min)%, respectively and 6.07 decrease in MDT, compared to plain drug. DSC, XRD analysis and SEM micrographs confirmed complete amorphization of DCN within the optimized SD. Physiologically based pharmacokinetic (PBPK) modeling was employed to predict PK parameters of DCN in middle aged healthy adults and geriatrics. Simcyp® software established in-vivo plasma concentration time curves of the optimized SD, compared to plain DCN. Relative bioavailability of the optimized SD compared to plain drug was 229.52% and 262.02% in healthy adults and geriatrics, respectively. Our study reports the utility of PBPK modeling for formulation development of BCS II APIs, via predicting their oral bio-performance.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0245482