Abstract
Purpose
The study evaluates the use of new in vitro primary human cell-based organotypic small intestinal (SMI) microtissues for predicting intestinal drug absorption and drug-drug interaction.
Methods
The SMI microtissues were reconstructed using human intestinal fibroblasts and enterocytes cultured on a permeable support. To evaluate the suitability of the intestinal microtissues to model drug absorption, the permeability coefficients across the microtissues were determined for a panel of 11 benchmark drugs with known human absorption and Caco-2 permeability data. Drug-drug interactions were examined using efflux transporter substrates and inhibitors.
Results
The 3D–intestinal microtissues recapitulate the structural features and physiological barrier properties of the human small intestine. The microtissues also expressed drug transporters and metabolizing enzymes found on the intestinal wall. Functionally, the SMI microtissues were able to discriminate between low and high permeability drugs and correlated better with human absorption data (r2 = 0.91) compared to Caco-2 cells (r2 = 0.71). Finally, the functionality of efflux transporters was confirmed using efflux substrates and inhibitors which resulted in efflux ratios of >2.0 fold and by a decrease in efflux ratios following the addition of inhibitors.
Conclusion
The SMI microtissues appear to be a useful pre-clinical tool for predicting drug bioavailability of orally administered drugs.











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- Ω:
-
Ohm
- 2D:
-
Two dimensional
- 3D:
-
Three dimensional
- Ǻ:
-
Angstrom
- (A):
-
Apical
- ABCB1:
-
ATP binding cassette subfamily B member 1
- ABCC1:
-
ATP Binding Cassette Subfamily C Member 1
- ABCC2:
-
ATP Binding Cassette Subfamily C Member 2
- ABCG2:
-
ATP-binding cassette sub-family G member 2
- ADR:
-
Adverse drug reaction
- ALI:
-
Air–liquid interface
- (B):
-
Basolateral
- BCRP:
-
Breast cancer resistance protein
- BCS:
-
Biopharmaceutical Classification System
- CDCF:
-
5(6)-carboxy-2′,7′-dichlorofluorescein (CDCF)
- cDNA:
-
Complementary DNA
- CK:
-
Cytokeratin
- Cq:
-
PCR cycles
- Ct:
-
Threshold cycle
- CYP450:
-
Cytochrome P450
- DDI:
-
Drug-drug interaction
- FDA:
-
Food and Drug Administration
- FT:
-
Full-thickness
- GAPDH:
-
Glyceraldehyde-3-phosphate dehydrogenase
- GI:
-
Gastrointestinal
- HPLC:
-
High performance liquid chromatography
- H:
-
Hour
- IIAM:
-
International Institute for the Advancement of Medicine
- LC/MS:
-
Liquid chromatography–mass spectrometry
- LY:
-
Lucifer Yellow
- MDCK:
-
Madin-Darby canine kidney
- MDR1:
-
Multi-drug resistance gene (MDR)-1
- Met:
-
Metabolite
- Min:
-
Minutes
- MRP-1:
-
Multidrug-resistance associated protein-1
- MRP-2:
-
Multidrug-resistance associated protein-2
- MS MRM:
-
Mass spectroscopy multiple reaction monitoring
- MTT:
-
3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyl tetrazolium bromide
- OPO:
-
Organ Procurement Organization
- Papp :
-
Apparent permeability coefficient
- P-gp:
-
p-Glycoprotein
- PR:
-
Parental
- PT:
-
Partial thickness
- qPCR:
-
Quantitative polymerase chain reaction
- RFU:
-
Relative fluorescence unit
- RNA:
-
Ribonucleic acid
- RT:
-
Room temperature
- RT-PCR:
-
Reverse Transcription Polymerase Chain Reaction
- SEM:
-
Scanning electron microscopy
- SMI:
-
Small intestine
- TEER:
-
Transepithelial electrical resistance
- TEM:
-
Transmission electron microscopy
- TTT:
-
TEER of treated tissues
- TUT:
-
TEER of untreated tissues
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Ayehunie, S., Landry, T., Stevens, Z. et al. Human Primary Cell-Based Organotypic Microtissues for Modeling Small Intestinal Drug Absorption. Pharm Res 35, 72 (2018). https://doi.org/10.1007/s11095-018-2362-0
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DOI: https://doi.org/10.1007/s11095-018-2362-0