Abstract
Recently, a mutant rat strain was described with a genetic defect for the biliary excretion of organic anions (TR− rats). To determine the possible heterogeneity of the transport systems in liver, intestine and kidney we investigated the transport of the anion 1-naphthol-β- d-glucuronide (1-NG) in isolated vascularly perfused organ preparations of the rat liver, intestine and kidney of both Wistar rats and TR− rats. 1-NG was administered as such (liver and kidney experiments) or formed intracellularly from 1-naphthol (1-N) (liver and gut experiments). Independent of the type of exposure to 1-NG, the biliary excretion was considerably impaired in TR− rats. In the intestine the total appearance and the vascular/luminal distribution pattern of 1-NG were not significantly different from the values in control rats. Furthermore, no significant disturbance was found with respect to the renal clearance of 1-NG in the TR− rat when compared with the Wistar rat. Thus, the genetic defect in the TR− rat is restricted to an impaired hepatobiliary excretion of 1-NG and does not affect the excretory systems of the intestine and kidney. These results suggest that the excretion of 1-NG by the liver, intestine and kidney involves distinct organ-specific transport systems.
Original language | English |
---|---|
Pages (from-to) | 588-592 |
Number of pages | 5 |
Journal | Naunyn-Schmiedeberg's Archives of Pharmacology |
Volume | 340 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 Jan 1989 |
Keywords
- 1-Naphthol-β- d-glucuronide
- Intestine
- Kidney
- Liver
- Mutant rats