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- Title
Thrifty, Rapid Intestinal Monolayers (TRIM) Using Caco-2 Epithelial Cells for Oral Drug Delivery Experiments.
- Authors
Lamson, Nicholas G.; Ball, Rebecca L.; Fein, Katherine C.; Whitehead, Kathryn A.
- Abstract
Purpose: Caco-2 monolayers are the most common model of the intestinal epithelium and are critical to the development of oral drug delivery strategies and gastrointestinal disease treatments. However, current monolayer systems are cost- and/or time-intensive, hampering progress. This study evaluates two separate methods to reduce resource input: FB Essence as a fetal bovine serum (FBS) alternative and a new, 3-day Caco-2 system deemed "thrifty, rapid intestinal monolayers" (TRIM). Methods: Caco-2 cells were cultured with FB Essence and compared to cells in 10% FBS for proliferation and monolayer formation. TRIM were compared to commonly-used 21-day and Corning® HTS monolayer systems, as well as mouse intestines, for permeability behavior, epithelial gene expression, and tight junction arrangement. Results: No amount of FB Essence maintained Caco-2 cells beyond 10 passages. In contrast, TRIM compared favorably in permeability and gene expression to intestinal tissues. Furthermore, TRIM cost $109 and required 1.3 h of time per 24-well plate, compared to $164 and 3.7 h for 21-day monolayers, and $340 plus 1.0 h for the HTS system. Conclusions: TRIM offer a new approach to generating Caco-2 monolayers that resemble the intestinal epithelium. They are anticipated to accelerate the pace of in vitro intestinal experiments while easing financial burden.
- Subjects
EPITHELIAL cells; MONOMOLECULAR films; GASTROINTESTINAL diseases; DRUG development; GENE expression; TIGHT junctions
- Publication
Pharmaceutical Research, 2019, Vol 36, Issue 12, pN.PAG
- ISSN
0724-8741
- Publication type
Article
- DOI
10.1007/s11095-019-2712-6