alexa Comparative in-vitro Intrinsic Clearance of Imipramine in Multiple Species Liver Microsomes: Human, Rat, Mouse and Dog
ISSN: 2157-7609

Journal of Drug Metabolism & Toxicology
Open Access

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Research Article

Comparative in-vitro Intrinsic Clearance of Imipramine in Multiple Species Liver Microsomes: Human, Rat, Mouse and Dog

Jitendra Kumar Singh1*, Anant Solanki2 and Vikas S. Shirsath2

1In vitro Pharmacology Laboratory, Gujarat, India

2Oxygen Healthcare Research Pvt. Ltd., Plot-35, Pancharatna Industrial Estate, Sarkhej Bawla Highway, Changodar, Ahmadabad, Gujarat-382213, India.

*Corresponding Author:
Jitendra Kumar Singh
In vitro Pharmacology Laboratory, Gujarat, India
Tel: +91-2717656415
Fax: +91-2717250262
E-mail: [email protected]

Received Date: April 17, 2012; Accepted Date: May 29, 2012; Published Date: May 31, 2012

Citation: Singh JK, Solanki A, Shirsath VS (2012) Comparative in-vitro Intrinsic Clearance of Imipramine in Multiple Species Liver Microsomes: Human, Rat, Mouse and Dog. J Drug Metab Toxicol 3:126. doi:10.4172/2157-7609.1000126

Copyright: © 2012 Singh JK, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Imipramine is a renowned tricyclic anti-depressant molecule. It is known to be highly potent and efficient as compared to any other antidepressants available. There are numerous literature reports which elucidate the metabolic pathways of Imipramine. There are also various reports showing the effect of substrate and time on metabolism of Imipramine. Most of analytical methods used in these studies were of HPLC and /or of LC-MS. These studies have also been extended to identification of specific isoforms of cytochrome P450 family responsible for the metabolism of Imipramine as is outlined. Further, LC-MS based studies have also been reported on the metabolism of Imipramine in in-vitro systems including human liver microsomes and its extrapolation on human oral bioavailability data. However, till date, there has been no published report on the systematic metabolic stability of this molecule in pooled mouse and dog liver microsomes. The present study was undertaken with the aim to understand the metabolic stability of imipramine in liver microsomes of different species including human, wistar rat, CD1 mouse and male beagle dog. We have also attempted to outline the differences between the metabolic stability in these four species. The reaction samples were scanned for specific m/z values corresponding to reported metabolites, which in turn confirms microsomal metabolism.

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