In vitro evaluation of water-insoluble silicates and polyvinylpyrrolidone-vinyl acetate as oral carriers for amorphous ritonavir. dissolution enhancement and the role of phosphatidylcholine
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Autor:in (Körperschaft)
Publikationsdatum
2026
Typ der Arbeit
Studiengang
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
International Journal of Pharmaceutics
Themenheft
DOI der Originalpublikation
Link
Zugehörige Forschungsdaten
Reihe / Serie
Reihennummer
Jahrgang / Band
704
Ausgabe / Nummer
Seiten / Dauer
127399
Patentnummer
Verlag / Herausgebende Institution
Elsevier
Verlagsort / Veranstaltungsort
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
Porous silicates have been investigated as drug carriers to promote the solubility and in vitro dissolution of poorly water-soluble drugs, owing to their potential to adsorb drug molecules in the amorphous form within their structural cavities. This study aimed to evaluate the efficiency of bentonite (BT), Aeroperl 300 Pharma (AP), and Florite PS-200 (FR) as water-insoluble silicate drug carriers, and the polymer polyvinylpyrrolidone-vinyl acetate (PVPVA) in improving the dissolution of ritonavir (RTV). The effect of phosphatidylcholine (PC) as a water-insoluble excipient on drug dissolution was also investigated. Multiple linear regression analysis of the dissolution data was performed to identify the factors influencing dissolution, complemented by mechanistic simulations of the best-performing carrier. The in vitro dissolution rank order of carriers with a 30% drug load (DL) based on % dissolved 300min was AP = FR > PVPVA = BT in the absence of PC, and AP > FR > PVPVA > BT with PC. The extent of dissolution for all formulations increased in the presence of PC, with the AP and FR formulations exceeding that of marketed formulations. High drug load did not significantly affect the dissolution profile of silicate formulations, but it reduced dissolution from PVPVA solid dispersion. In silico results showed that silicate pore size governed RTV release, with open pores forming fewer hydrogen bonds, allowing more facile RTV release. The significant improvement in RTV dissolution with AP and FR supports the use of these carriers for poorly soluble drugs as alternatives to traditional polymers, especially for formulations with high drug loads.
Schlagwörter
Fachgebiet (DDC)
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
0378-5173
1873-3476
1873-3476
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Ja
Zukunftsfelder FHNW
Publikationsstatus
Veröffentlicht
Begutachtung
peer-reviewed
Open Access-Status
Hybrid
Lizenz
Zitation
Dhumal, G., Savoy, A., Kuentz, M., & Polli, J. E. (2026). In vitro evaluation of water-insoluble silicates and polyvinylpyrrolidone-vinyl acetate as oral carriers for amorphous ritonavir. dissolution enhancement and the role of phosphatidylcholine. International Journal of Pharmaceutics, 704, 127399. https://doi.org/10.1016/j.ijpharm.2026.127399