Delivery of amitriptyline by intravenous and intraperitoneal administration compared in the same animal by whole-body mass spectrometry imaging of a stable isotope labelled drug substance in mice.

Abstract:

BACKGROUND:The distribution and metabolism of a drug in the organism are dependent on the administration route as well as on the drug formulation. It is important to be able to assess which impact the administration route or formulation of a drug has for its distribution and metabolism. METHODS:The antidepressant drug amitriptyline was intravenously (IV) dosed to a mouse and immediately after, a similar amount of a deuterium-labeled version of the drug was intraperitoneally (IP) dosed to the same animal. Whole-body cryo-sections were made at t = 5, 15, 30, and 60 min post-dosing, and the two drug substances and metabolites were imaged by DESI-MS/MS. RESULTS:After 5 min, the IV dosed drug was detected throughout the animal, while the IP dosed drug was primarily found in the abdominal cavity. At later times, the differences between the two administration routes became less pronounced. Two administration routes provided highly similar metabolite distributions, also at early time points. CONCLUSION:The method provides a unique way to compare delivery and metabolism of a drug by different administration routes or formulations in the very same animal, eliminating uncertainties caused by animal-to-animal variation and avoiding the use of radioactive labeling.

journal_name

Expert Opin Drug Deliv

authors

Morineau L,Jacobsen SC,Kleberg K,Hansen HS,Janfelt C

doi

10.1080/17425247.2018.1541084

subject

Has Abstract

pub_date

2018-12-01 00:00:00

pages

1157-1163

issue

12

eissn

1742-5247

issn

1744-7593

journal_volume

15

pub_type

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