title: Prevention of rat liver fibrosis and carcinogenesis by coffee and caffeine.
abstract: Coffee has been inversely related to the incidence of human liver disease; however, whether caffeine is the component responsible for the beneficial effects of coffee remains controversial. This study evaluated the beneficial effects of coffee or caffeine in a medium-term bioassay for rat liver fibrosis/carcinogenesis induced by diethylnitrosamine (DEN) and carbon tetrachloride (CCl4). One week after the DEN injection, the groups started to receive conventional coffee, instant coffee or 0.1% caffeine ad libitum for 24 weeks. The groups receiving conventional coffee or caffeine presented a significant reduction in collagen content and mRNA expression of collagen I. The groups receiving instant coffee or caffeine had a significant reduction in the size and area of pre-neoplastic lesions and in the mean number of neoplastic lesions. A significant increase in liver bax protein levels was observed in the groups receiving instant coffee or caffeine as compared to the control group. These data indicate that the most pronounced hepatoprotective effect against fibrosis was observed in the groups receiving conventional coffee and 0.1% caffeine, and the greatest effects against liver carcinogenesis were detected in the groups receiving instant coffee and 0.1% caffeine.
authors.affiliation: UNESP - Univ. Estadual Paulista, Department of Pathology, School of Medicine, Botucatu 18618-970, São Paulo, Brazil.
authors.forename: Kelly S
authors.initials: KS
authors.lastname: Furtado
authors.affiliation: UNESP - Univ. Estadual Paulista, Department of Pathology, School of Medicine, Botucatu 18618-970, São Paulo, Brazil.
authors.forename: Jossimara
authors.initials: J
authors.lastname: Polletini
authors.affiliation: UNESP - Univ. Estadual Paulista, Department of Pathology, School of Medicine, Botucatu 18618-970, São Paulo, Brazil.
authors.forename: Marcos C
authors.initials: MC
authors.lastname: Dias
authors.affiliation: UNESP - Univ. Estadual Paulista, Department of Pathology, School of Medicine, Botucatu 18618-970, São Paulo, Brazil.
authors.forename: Maria A M
authors.initials: MA
authors.lastname: Rodrigues
authors.affiliation: UNESP - Univ. Estadual Paulista, Department of Morphology, Institute of Biosciences, Botucatu 18618-970, São Paulo, Brazil. Electronic address: barbisan@ibb.unesp.br.
authors.forename: Luis F
authors.initials: LF
authors.lastname: Barbisan
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002110:Caffeine / Q000494:pharmacology*; D063646:Carcinogenesis / Q000187:drug effects*; D003069:Coffee; D003094:Collagen / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D008103:Liver Cirrhosis / Q000517:prevention & control*; D008114:Liver Neoplasms, Experimental / Q000201:enzymology / Q000517:prevention & control*; D008297:Male; D011230:Precancerous Conditions / Q000201:enzymology / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D060888:Real-Time Polymerase Chain Reaction
chemical_list: D003069:Coffee; D002110:Caffeine; D003094:Collagen; D005982:Glutathione Transferase
keywords: Caffeine; Coffee beverages; Liver fibrosis and carcinogenesis; Prevention