Artificial Lipid Membrane Permeability Method for Predicting Intestinal Drug Transport: Probing the Determining Step in the Oral Absorption of Sulfadiazine; Influence of the Formation of Binary and Ternary Complexes with Cyclodextrins

DELRIVO A.; ALOISIO CAROLINA; LONGHI M.; GRANERO G.

AAPS PHARMSCITECH

SPRINGER

Lugar: Berlin; Año: 2018

1530-9932

e propose an in vitro permeability assay by using a modified lipid membrane to predict the in vivo intestinal passive permeability of drugs. Two conditions were tested, one with a gradient pH (pH 5.5 donor/pH 7.4 receptor) and the other with an iso-pH 7.4. The predictability of the method was established by correlating the obtained apparent intestinal permeability coefficients (P ) and the oral dose fraction absorbed in humans (f ) of 16 drugs with different absorption properties. The P values correlated well with the absorption rates under the two conditions, and the method showed high predictability and good reproducibility.On the other hand, with this method, we successfully predicted the transport characteristics of oral sulfadiazine (SDZ). Also, the tradeoff between the increase in the solubility of SDZ by its complex formation with cyclodextrins and/or aminoacids and its oral permeability was assessed. Results suggest that SDZ is transported through the gastrointestinal epitheli