title: Angiotensin converting enzyme inhibitory activity of amino acid esters of carbohydrates.
abstract: L-alanyl-D-glucose, L-valyl-D-glucose, L-phenylalanyl-D-glucose and L-phenylalanyl-lactose esters were synthesized enzymatically using two lipases viz., Rhizomucor miehei lipase (RML) and porcine pancreas lipase (PPL) and tested for their potential as inhibitors of angiotensin converting enzyme (ACE) in vitro. The esters exhibited concentration related ACE inhibitory activity. The potency of the various esters measured in terms of IC50 values were as follows: L-phenylalanyl-D-glucose, IC50-0.121 mM (mixture of five diastereomeric esters: 6-O-24.1%; 3-O-23.3%; 2-O-19.2%; 2,6-di-O-16.6% and 3,6-di-O-16.8% from the total yield of 92.4%); L-phenylalanyl-lactose, IC50-0.229 mM (mixture of three diastereomeric esters: 6-O-42.1%; 6'-O-30.9%; and 6,6'-di-O-27.0% from the total yield of 50.58%); alanyl-D-glucose, IC50-0.23 mM (mixture of five diastereomeric esters: 6-O-46.7%; 3-O-11.5%; 2-O-19.9%; 2,6-di-O-6.6% and 3,6-di-O-15.3% from the total yield of 26.5%) and L-valyl-D-glucose, IC50-0.396 mM (mixture of five diastereomeric esters: 6-O-32.4%; 3-O-26.5%; 2-O-26.4%; 2,6-di-O-8.8% and 3,6-di-O-5.9% from the total yield of 68.2%). These in vitro data suggest a potential therapeutic role for the aminoesters of carbohydrates as inhibibitors of ACE.
authors.affiliation: Food Protectants and Infestation Control Department, Central Food Technological Research Institute, Mysore 570 020, India.
authors.forename: Vasudeva
authors.initials: V
authors.lastname: Kamath
authors.forename: P S
authors.initials: PS
authors.lastname: Rajini
authors.forename: K
authors.initials: K
authors.lastname: Lohith
authors.forename: B R
authors.initials: BR
authors.lastname: Somashekar
authors.forename: S
authors.initials: S
authors.lastname: Divakar
mesh_terms: D000409:Alanine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D002175:Candida / Q000201:enzymology; D004353:Drug Evaluation, Preclinical; D004951:Esterification; D005960:Glucosides / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D007703:Peptidyl-Dipeptidase A / Q000187:drug effects*; D010649:Phenylalanine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D020103:Rhizomucor / Q000201:enzymology; D014633:Valine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D005960:Glucosides; C512749:alanylglucose; C512751:phenylalanylglucose; C512752:phenylalanyllactose; C512750:valylglucose; D010649:Phenylalanine; D007703:Peptidyl-Dipeptidase A; D014633:Valine; D000409:Alanine