Recent advances in cannabis study have led to the identification of the cannabinoid receptors, the endogenous ligands, and a number of synthetic agonists and antagonists. Much interest currently exists in the search for other possible endogenous ligands as well as other types of cannabinoid agonists and antagonists. Previous pharmacokinetics and metabolism studies have focused on the classical cannabinoids, and existing analytical methods either require lengthy clean-up and derivatization steps, or are inadequate in sensitivity and selectivity. The metabolism of several novel cannabinoid agonists/antagonists has not been studied in detail. Based on our current knowledge that several metabolites of delta9- tetrahydrocannabinol are potent cannabimimetic compounds, we hypothesize that certain metabolites of the recently found agonists and antagonists may also inhibit cannabimimetic properties. TO test that hypothesis, we propose to first develop a hyphenated tandem mass spectrometric (MS/MS) method based upon high performance liquid chromatography coupled to MS/MS through soft ionization techniques. Next, we will identify the in vitro and in vivo metabolites of representative cannabimimetic compounds using Sprague-Dawley rats. Major metabolites from each agonist or antagonist will then be isolated and purified. Receptor binding assays will be carried out to evaluate binding affinities of the metabolites for the central cannabinoid receptor. The proposed research will yield valuable information on the phase I and phase II metabolic profiles of the cannabinoid agonists and antagonists, as well as information on the potential in vivo cannabimimetic properties of the metabolites. Implementation of this project will greatly help the P.I. and the co-investigator to obtain valuable results, to minority students in research , and to seek additional funding for extending the cannabinoid research.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Minority Biomedical Research Support - MBRS (S06)
Project #
5S06GM008008-30
Application #
6450670
Study Section
Minority Programs Review Committee (MPRC)
Project Start
2001-04-01
Project End
2002-03-31
Budget Start
Budget End
Support Year
30
Fiscal Year
2001
Total Cost
$38,454
Indirect Cost
Name
Xavier University of Louisiana
Department
Type
DUNS #
020857876
City
New Orleans
State
LA
Country
United States
Zip Code
70125
Shimada, Tsutomu; Takenaka, Shigeo; Kakimoto, Kensaku et al. (2016) Structure-Function Studies of Naphthalene, Phenanthrene, Biphenyl, and Their Derivatives in Interaction with and Oxidation by Cytochromes P450 2A13 and 2A6. Chem Res Toxicol 29:1029-40
Shimada, Tsutomu; Takenaka, Shigeo; Murayama, Norie et al. (2016) Oxidation of pyrene, 1-hydroxypyrene, 1-nitropyrene and 1-acetylpyrene by human cytochrome P450 2A13. Xenobiotica 46:211-24
Liu, Jiawang; Pham, Peter T; Skripnikova, Elena V et al. (2015) A Ligand-Based Drug Design. Discovery of 4-Trifluoromethyl-7,8-pyranocoumarin as a Selective Inhibitor of Human Cytochrome P450 1A2. J Med Chem 58:6481-93
Goyal, Navneet; Liu, Jiawang; Lovings, La'Nese et al. (2014) Ethynylflavones, highly potent, and selective inhibitors of cytochrome P450 1A1. Chem Res Toxicol 27:1431-9
Liu, Jiawang; Taylor, Shannon F; Dupart, Patrick S et al. (2013) Pyranoflavones: a group of small-molecule probes for exploring the active site cavities of cytochrome P450 enzymes 1A1, 1A2, and 1B1. J Med Chem 56:4082-92
Foroozesh, Maryam; Jiang, Quan; Sridhar, Jayalakshmi et al. (2013) DESIGN, SYNTHESIS, AND EVALUATION OF CARBAZOLE ANALOGS AS POTENTIAL CYTOCHROME P450 INHIBITORS. J Undergrad Chem Res 12:92-95
Foroozesh, Maryam; Jiang, Quan; Sridhar, Jayalakshmi et al. (2013) DESIGN, SYNTHESIS, AND EVALUATION OF A FAMILY OF PROPARGYL PYRIDINYL ETHERS AS POTENTIAL CYTOCHROME P450 INHIBITORS. J Undergrad Chem Res 12:91-94
Shimada, Tsutomu; Kim, Donghak; Murayama, Norie et al. (2013) Binding of diverse environmental chemicals with human cytochromes P450 2A13, 2A6, and 1B1 and enzyme inhibition. Chem Res Toxicol 26:517-28
Liu, Jiawang; Sridhar, Jayalakshmi; Foroozesh, Maryam (2013) Cytochrome P450 family 1 inhibitors and structure-activity relationships. Molecules 18:14470-95
Liu, Jiawang; Nguyen, Thong T; Dupart, Patrick S et al. (2012) 7-Ethynylcoumarins: selective inhibitors of human cytochrome P450s 1A1 and 1A2. Chem Res Toxicol 25:1047-57

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