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Intestinal Lymphatic Transport Enhances the Post-Prandial Oral Bioavailability of a Novel Cannabinoid Receptor Agonist Via Avoidance of First-Pass Metabolism.
- Source :
-
Pharmaceutical Research . Jun2009, Vol. 26 Issue 6, p1486-1495. 10p. - Publication Year :
- 2009
-
Abstract
- Abstract Purpose  To examine the effect of food on the oral bioavailability of a highly lipophilic, cannabinoid receptor agonist (CRA13) and to explore the basis for the food effect in lymph-cannulated and non-cannulated dogs. Methods  Oral bioavailability was assessed in fasted and fed human volunteers and in lymph-cannulated dogs. In fasted dogs, the extent of absorption and oral bioavailability was also examined following administration of radiolabelled CRA13. Results  Food had a substantial positive effect on the oral bioavailability of CRA13 in human volunteers (4.3–4.9 fold increase in $${\text{AUC}}_{{\text{0 - }}\infty } $$) and in dogs. The absolute bioavailability of parent drug was low in fasted dogs (8–20%), in spite of good absorption (72–75% of radiolabelled CRA13 recovered in the systemic circulation). In post-prandial lymph-cannulated dogs, bioavailability increased to 47.5% and the majority (43.7%) of the dose was absorbed via the intestinal lymphatic system. Conclusions  The positive food effect for CRA13 does not appear to result from increased post-prandial absorption. Rather these data provide one of the first examples of a significant increase in bioavailability for a highly lipophilic drug, which is stimulated via almost complete post-prandial transport into the lymph, in turn resulting in a reduction in first-pass metabolism. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07248741
- Volume :
- 26
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Pharmaceutical Research
- Publication Type :
- Academic Journal
- Accession number :
- 39058582
- Full Text :
- https://doi.org/10.1007/s11095-009-9860-z