title: Pharmacokinetics of oral and intravenous administration of digoxin after intestinal ischemia-reperfusion.
abstract: Intestinal ischemia-reperfusion (I/R) causes gut dysfunction characterized by decreased basement membrane integrity and decreased barrier function. Indeed, it has been reported that the absorption of several drugs is altered after intestinal I/R. Intestinal I/R also promotes multi-organ failure (MOF). The liver and kidney can be affected by MOF after intestinal I/R. However, little is known about the alteration of pharmacokinetics after intravenous administration in intestinal I/R injury. In the present study, we investigated pharmacokinetics of digoxin after oral administration and intravenous administration in intestinal I/R injury. Plasma digoxin concentration in I/R rats after oral administration was not significantly altered at any time compared with that in sham-operated rats. Plasma digoxin concentration in rats reperfused for 1 h after intravenous administration was significantly higher than that in sham-operated rats. Plasma digoxin concentrations in rats reperfused for 6 and 24 h were the same as those in sham-operated rats. The area under the concentration.time curve after intravenous administraion (AUC(i.v.)) and total clearance (CL(tot)) in rats reperfused for 1 h was 1.89- and 0.57-fold higher than that in sham-operated rats. However, elimination rate (k(e)) and half-life (t(1/2)) in rats reperfused for 1 h were not altered. Distribution volume (V(d)) in rats reperfused for 1 h was decreased than that in sham-operated rats, but there was not statistical difference. These results suggest that intestinal I/R affected the V(d) of digoxin, and plasma concentration of digoxin was increased. The present study suggests that understanding pharmacokinetics of drug after intravenous administration in intestinal I/R injury is important to provide valuable information for safe drug therapy for intestinal I/R patients.
authors.affiliation: Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12-jo, Nishi-6-chome, Kita-ku, Sapporo 060-0812, Japan.
authors.forename: Jiro
authors.initials: J
authors.lastname: Ogura
authors.forename: Hajime
authors.initials: H
authors.lastname: Maruyama
authors.forename: Masaki
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Shirou
authors.initials: S
authors.lastname: Itagaki
authors.forename: Ken
authors.initials: K
authors.lastname: Iseki
mesh_terms: D000284:Administration, Oral; D000818:Animals; D019540:Area Under Curve; D004077:Digoxin / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D007262:Infusions, Intravenous; D007413:Intestinal Mucosa / Q000378:metabolism*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D015427:Reperfusion Injury / Q000378:metabolism*
chemical_list: D004077:Digoxin