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Drug Delivery Letters


ISSN (Print): 2210-3031
ISSN (Online): 2210-304X

Research Article

Effects of Transport Medium Composition on In vitro Drug Permeation Across Excised Pig Intestinal Tissue

Author(s): Bianca Peterson*, Henrico Heystek, Josias H. Hamman and Johan D. Steyn

Volume 11, Issue 1, 2021

Published on: 05 October, 2020

Page: [62 - 70] Pages: 9

DOI: 10.2174/2210303110999201005214114

Price: $65


Background: Knowledge of the permeation characteristics of new chemical entities across biological membranes is essential to drug research and development. Transport medium composition may affect the absorption of compounds during in vitro drug transport testing. To preserve the predictive values of screening tests, the possible influence of transport media on the solubility of model drugs and on the activities of tight junctions and efflux transporter proteins (e.g., Pglycoprotein) must be known.

Objective: The aim of this study was to compare the impact of different transport media on the bidirectional transport of standard compounds, selected from the four classes of the Biopharmaceutical Classification System (BCS), across excised pig intestinal tissue.

Methods: The Sweetana-Grass diffusion apparatus was used for transport studies. Krebs-Ringer bicarbonate (KRB) buffer and simulated intestinal fluids in the fed (FeSSIF) and fasted (FaSSIF) states were used as the three transport media, while the chosen compounds were abacavir (BCS class 1), dapsone (BCS class 2), lamivudine (BCS class 3) and furosemide (BCS class 4).

Results: Abacavir exhibited lower permeability in both the simulated intestinal fluids than in the KRB buffer. Dapsone showed similar permeability in all media. Lamivudine exhibited lower permeability in FaSSIF than in the other two media. Furosemide exhibited improved transport with pronounced efflux in FaSSIF.

Conclusion: Different permeation behaviors were observed for the selected drugs in the respective media, which may have resulted from their different physico-chemical properties, as well as from the effects that dissimilar transport media components had on excised pig intestinal tissue.

Keywords: Buffer, drug transport studies, in vitro model, simulated intestinal fluid, Sweetana-Grass diffusion chamber apparatus, transport medium.

Graphical Abstract
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