title: Quantitation of adenine nucleotides in equine colonic mucosal tissue using high performance liquid chromatography.
abstract: The objectives were to use high performance liquid chromatography (HPLC) to validate an established method for adenine nucleotide separation in equine colonic mucosal tissue, to determine the inherent variability in the tissue and extraction method, and to determine the stability of ATP, ADP, and AMP in the tissue with time. Equine colonic mucosal tissue obtained from a single horse was immediately submersed in liquid nitrogen, and stored at -70 degrees C. Samples were lyophilized, extracted, and separated by HPLC. The limit of quantitation was 0.05 microg/mL. The coefficient of variation for the instrument was less than 10% for all nucleotides measured. When the tissue was not homogenized prior to sampling, there were significant differences in adenine nucleotide content between samples. However, when the tissue was homogenized prior to analysis, these differences were no longer significant. There was no significant decrease in ATP, ADP, or AMP content over a 54-day analysis period.
authors.affiliation: Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803-8410, USA. jtetens@mail.vetmed.lsu.edu
authors.forename: J
authors.initials: J
authors.lastname: Tetens
authors.forename: S A
authors.initials: SA
authors.lastname: Barker
authors.forename: M
authors.initials: M
authors.lastname: Waguespack
authors.forename: G
authors.initials: G
authors.lastname: Hosgood
mesh_terms: D000227:Adenine Nucleotides / Q000032:analysis*; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods / Q000662:veterinary*; D003106:Colon; D006736:Horses; D007413:Intestinal Mucosa / Q000737:chemistry*; D015203:Reproducibility of Results; D013997:Time Factors
chemical_list: D000227:Adenine Nucleotides