Functional expression of P-glycoprotein in primary cultures of human cytotrophoblasts and BeWo cells
Issue Date
2000Author
Utoguchi, Naoki
Chandorkar, Gurudatt A.
Avery, Michael
Audus, Kenneth L.
Publisher
Elsevier
Type
Article
Article Version
Scholarly/refereed, author accepted manuscript
Metadata
Show full item recordAbstract
The objective of this study was to investigate the functional expression of the efflux transporter, P-glycoprotein (P-gp), in primary cultures of human cytotrophoblasts and BeWo cell monolayers. Uptake studies with primary cultures of human cytotrophoblasts or BeWo cells were conducted with calcein-AM and vinblastine (P-gp markers) or fluorescein (MRP marker) in the presence of specific P-gp or MRP inhibitors. Results showed that the accumulation of P-gp substrates calcein-AM and vinblastine by BeWo cells or primary cultures of human cytotrophoblasts was significantly enhanced in the presence of a typical P-gp inhibitor, cyclosporin-A, or other inhibitors such as quinidine, verapamil and dipyridamole. MRP inhibitors had no effect on the accumulation of calcein or fluorescein by BeWo cells. Western blots confirmed the presence of multidrug resistant gene product 1 (MDR1) in both, primary cultures of human cytotrophoblasts and BeWo cells. This study demonstrates functional P-gp in term human trophoblasts and further supports the use of primary cultures of human cytotrophoblasts and BeWo cells as in vitro models of the trophoblast to investigate mechanisms regulating drug distribution across the placenta.
Collections
- Pharmacy Scholarly Works [293]
Citation
Utoguchi, N., Chandorkar, G.A., Avery, M., and Audus, K.L. (2000) Functional expression of P-glycoprotein in primary cultures of human cytotrophoblasts and BeWo cells. Reprod. Toxicol. 14, 217-224. PMID: 10838122 http://dx.doi.org/10.1016/S0890-6238(00)00071-X
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