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Biorelevant drug solubility enhancement modeled by a linear solvation energy relationship

Autor/Autorin
Niederquell, Andreas
Kuentz, Martin
Datum
2017
Metadata
Zur Langanzeige
Type
01 - Zeitschriftenartikel, Journalartikel oder Magazin
Zusammenfassung
It is for the pharmaceutical sciences of vital importance to understand how drugs are solubilized in biorelevant media. However, the complexity of fasted state simulated intestinal fluid (FaSSIF) has so far hampered adequate solubility modeling. The present study focuses on apparently neutral compounds at physiological pH and a linear free energy relationship is introduced for biorelevant drug solubilization. Based on literature data of 40 compounds, the Abraham solvation descriptors were calculated from chemical structure to then predict the ratio of solubility enhancement log(SE) in FaSSIF compared to aqueous buffer solubility at pH 6.5. A suitable model was obtained with R2 of 0.810 and notable were especially the positive effect of McGowan's characteristic volume and the negative effect of drug basicity. A negative influence on log(SE) was further evidenced for dipolarity/polarizability and for the excess molar refraction descriptor. A positive solubilization effect was obtained for drug acidity and hence the tendency for proton donation, which was likely due to the different proton-accepting moieties of taurocholic acid and lecithin that are both present in the mixed colloids of FaSSIF. Overall, an improved understanding was achieved regarding the molecular features that are driving drug solubilization in biorelevant media.
URI
http://hdl.handle.net/11654/25769
DOI der Originalausgabe
https://doi.org/10.1016/j.xphs.2017.08.017
Übergeordnetes Werk
Journal of Pharmaceutical Sciences
Jahrgang
107
Ausgabe
1
Seiten
503-506
Zitation

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