title: The effects of the decaffeination of coffee samples on platelet aggregation in hyperlipidemic rats.
abstract: The effect of coffee on cardiovascular diseases is still controversial. It is known that the process of decaffeination may influence the chemical constitution and, therefore, the biological effects of coffee. This study thus evaluated the effects of decaffeination on the levels of total phenols and chlorogenic acids in Coffea arabica L. samples, as well as the effects of ingesting both integral and decaffeinated coffee on the lipid profile and hemostatic and hematological parameters in normal and hyperlipidemic rats. Samples of integral and decaffeinated lyophilized coffee (Coffea arabica L., planted in Brazil) were used for chemical analysis (total phenols, chlorogenic acid and caffeine contents). For the bioassays, coffee beverages were prepared with non-lyophilized samples (10% w/v) and were filtered and administered to animals by gavage (7.2 mL/kg/day) over 30 days. On the 31st day after beginning the treatment with coffee beverages, hyperlipidemia was induced to the animals by administering Triton WR-1339 (300 mg/kg body weight). On day 32, blood was taken to determine the lipid profile, platelet aggregation, prothrombin time, partially activated thromboplastin time and hemogram. The contents of both phenolic compounds and chlorogenic acid in the integral coffee beverage were significantly lower than those in the decaffeinated coffee beverage. The animals treated with Triton WR-1339 presented a mixed hyperlipidemia. Although the decaffeination process caused a relative increase in total phenols and chlorogenic acids, the coffee drinks were unable to change the lipid profile or the hemostatic and hematological parameters in the studied animals.
authors.affiliation: Departamento de Ciência dos Alimentos, Universidade Federal de Lavras, Lavras, MG, Brazil.
authors.forename: Alessandra dos Santos Danziger
authors.initials: Ados S
authors.lastname: Silvério
authors.forename: Rosemary Gualberto Fonseca Alvarenga
authors.initials: RG
authors.lastname: Pereira
authors.forename: Adriene Ribeiro
authors.initials: AR
authors.lastname: Lima
authors.forename: Fernanda Borges de Araújo
authors.initials: FB
authors.lastname: Paula
authors.forename: Maria Rita
authors.initials: MR
authors.lastname: Rodrigues
authors.forename: Lineu
authors.initials: L
authors.lastname: Baldissera
authors.forename: Stella Maris da Silveira
authors.initials: SM
authors.lastname: Duarte
mesh_terms: D000818:Animals; D001938:Brazil; D002110:Caffeine / Q000032:analysis*; D002726:Chlorogenic Acid / Q000008:administration & dosage / Q000032:analysis; D040503:Coffea / Q000737:chemistry; D003069:Coffee / Q000737:chemistry*; D005511:Food Handling / Q000379:methods; D006949:Hyperlipidemias / Q000097:blood* / Q000139:chemically induced; D008055:Lipids / Q000097:blood; D008297:Male; D010314:Partial Thromboplastin Time; D010636:Phenols / Q000008:administration & dosage / Q000032:analysis; D010974:Platelet Aggregation / Q000187:drug effects*; D011092:Polyethylene Glycols; D011517:Prothrombin Time; D051381:Rats; D017208:Rats, Wistar; D012639:Seeds / Q000737:chemistry
chemical_list: D003069:Coffee; D008055:Lipids; D010636:Phenols; D002726:Chlorogenic Acid; D002110:Caffeine; D011092:Polyethylene Glycols; C016811:tyloxapol