Possible Intestinal Absorption Enhancers from Citrus hystrix
Bioavailability of orally administered drugs is regulated by P-gp, a member of the ATP binding cassette transporter families. It expresses at the apical surface of epithelial cells and effluxs out several clinically important drugs resulting in decreased absorption and bioavailability. In recent yea...
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Published in | E3S web of conferences Vol. 141; p. 2003 |
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Format | Journal Article |
Language | English |
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EDP Sciences
01.01.2020
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Abstract | Bioavailability of orally administered drugs is regulated by P-gp, a member of the ATP binding cassette transporter families. It expresses at the apical surface of epithelial cells and effluxs out several clinically important drugs resulting in decreased absorption and bioavailability. In recent years, the utilization of bioenhancer to increase the bioavailability of drugs has extensively studied. The objective of this study was to evaluate the potential of the compounds found in
Citrus hystrix
as a bioenhancer for orally administered drugs by modulation of P-gp function. The modulation effects of fruit extracts and isolated pure compounds on P-gp were investigated by uptake assay of the P-gp substrate calcein-AM in Caco-2, LLC-PK1 and LLC-GA5-COL300 cell lines. The results show that the extract from the flavedo part remarkably increased calcein-AM uptake in Caco-2 and LLC-GA5-COL300 cell lines. Among five furanocoumarins identified, 6’,7’-epoxybergamottin, 6’,7’-dihydroxybergamottin and oxypeucedanin significantly enhanced calcein-AM uptake in LLC-GA5-COL300 in a concentration-dependent manner, indicating strongly inhibition effects on P-gp function. Taken together, 6’,7’-epoxybergamottin, 6’,7’-dihydroxybergamottin and oxypeucedanin could be employed as the potential intestinal bioenhancer to improve the bioavailability of P-gp substrate drugs. However, further studies including
in vivo
studies should be performed to confirm these findings. |
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AbstractList | Bioavailability of orally administered drugs is regulated by P-gp, a member of the ATP binding cassette transporter families. It expresses at the apical surface of epithelial cells and effluxs out several clinically important drugs resulting in decreased absorption and bioavailability. In recent years, the utilization of bioenhancer to increase the bioavailability of drugs has extensively studied. The objective of this study was to evaluate the potential of the compounds found in Citrus hystrix as a bioenhancer for orally administered drugs by modulation of P-gp function. The modulation effects of fruit extracts and isolated pure compounds on P-gp were investigated by uptake assay of the P-gp substrate calcein-AM in Caco-2, LLC-PK1 and LLC-GA5-COL300 cell lines. The results show that the extract from the flavedo part remarkably increased calcein-AM uptake in Caco-2 and LLC-GA5-COL300 cell lines. Among five furanocoumarins identified, 6’,7’-epoxybergamottin, 6’,7’-dihydroxybergamottin and oxypeucedanin significantly enhanced calcein-AM uptake in LLC-GA5-COL300 in a concentration-dependent manner, indicating strongly inhibition effects on P-gp function. Taken together, 6’,7’-epoxybergamottin, 6’,7’-dihydroxybergamottin and oxypeucedanin could be employed as the potential intestinal bioenhancer to improve the bioavailability of P-gp substrate drugs. However, further studies including in vivo studies should be performed to confirm these findings. Bioavailability of orally administered drugs is regulated by P-gp, a member of the ATP binding cassette transporter families. It expresses at the apical surface of epithelial cells and effluxs out several clinically important drugs resulting in decreased absorption and bioavailability. In recent years, the utilization of bioenhancer to increase the bioavailability of drugs has extensively studied. The objective of this study was to evaluate the potential of the compounds found in Citrus hystrix as a bioenhancer for orally administered drugs by modulation of P-gp function. The modulation effects of fruit extracts and isolated pure compounds on P-gp were investigated by uptake assay of the P-gp substrate calcein-AM in Caco-2, LLC-PK1 and LLC-GA5-COL300 cell lines. The results show that the extract from the flavedo part remarkably increased calcein-AM uptake in Caco-2 and LLC-GA5-COL300 cell lines. Among five furanocoumarins identified, 6’,7’-epoxybergamottin, 6’,7’-dihydroxybergamottin and oxypeucedanin significantly enhanced calcein-AM uptake in LLC-GA5-COL300 in a concentration-dependent manner, indicating strongly inhibition effects on P-gp function. Taken together, 6’,7’-epoxybergamottin, 6’,7’-dihydroxybergamottin and oxypeucedanin could be employed as the potential intestinal bioenhancer to improve the bioavailability of P-gp substrate drugs. However, further studies including in vivo studies should be performed to confirm these findings. |
Author | Thein Maw, May Phyu Sukonpan, Chanokporn Phattanawasin, Panadda Piyapolrungroj, Nusara |
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