Date on Master's Thesis/Doctoral Dissertation


Document Type

Master's Thesis

Degree Name



Pharmacology and Toxicology

Committee Chair

Song, Zhao-Hui

Author's Keywords

Cannabinoid; Diabetes; Screening; HTRF; GPR119; GPCR


Ligands; Cell receptors


A cell-based, Homogenous Time Resolved Fluorescence (HTRF) method was optimized and used to test a library of 60 putative endocannabinoids for activity towards CB1 or CB2, and to test cannabinoid ligands and fatty acid amides for GPRl19 by measuring cAMP levels in this study. The Z' factors for the assay were greater than 0.5 for all three receptors and the assay was able to can tolerate up to 1% DMSO demonstrating a robust and suitable technology for screening. The known cannabinoid and GPRl19 agonists exhibited the rank order of potency expected for CB1/CB2/GPRl19. Our data demonstrate that none of the amides, N-acyl amino acids (glycine and alanine) Acyl-dopamines, and Acyl-GABAs was able to activate either CB1 or CB2. However the ethanoamides Dihomo-gamma-linolenoyl ethanolamide (DLEA) and DTEA Docosatetra-7Z,1 OZ, 13Z, 16Z-enoyl ethanolamide (DTEA) were found to activate CB1 and CB2. Our data provide direct evidence to support the hypothesis that unsaturation in the acyl chain of fatty acid ethanolamides affects the ability of these compounds to activate GPRl19. Our results suggested that GPRl19 activation requires certain structural requirements for the charged head groups of the fatty acid amides.