Skip to Content
Merck
CN
Biomedical reports (2021-08-19)
Atcharaporn Ontawong, Acharaporn Duangjai, Chutima Srimaroeng
ABSTRACT

The major constituents of Coffea arabica (coffee), including caffeine, chlorogenic acid and caffeic acid, exhibit antihyperglycemic properties in in vitro and in vivo models. However, whether Coffea arabica bean extract (CBE) regulates glucose uptake activity and the underlying mechanisms involved remain unclear. The aim of the present study was to examine the effects of CBE on glucose absorption and identify the mechanisms involved using an in vitro model. The uptake of a fluorescent glucose analog into Caco-2 colorectal adenocarcinoma cells was determined. The expression levels of sodium glucose co-transporter 1 (SGLT1) and glucose transporter 2 (GLUT2) were evaluated. In addition, glycoside hydrolase enzyme activity was investigated. It was observed that CBE inhibited disaccharidase enzyme activity. Furthermore, CBE exerted an inhibitory effect on intestinal glucose absorption by downregulating SGLT1- and GLUT2-mediated 5' AMP-activated protein kinase phosphorylation and suppressing hepatocyte nuclear factor 1α expression. These data suggest that CBE may attenuate glucose absorption and may have potentially beneficial antihyperglycemic effects in the body; however, the mechanisms underlying the effects of CBE must be elucidated through further investigation.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Anti-GLUT-2, from rabbit, purified by affinity chromatography
Sigma-Aldrich
Goat Anti-Rabbit IgG Antibody, Peroxidase Conjugated, 1 mg/mL (after reconstitution), Chemicon®
Sigma-Aldrich
Anti-SGLT-1 (Sodium Glucose Co-transporter-1) Antibody, serum, from rabbit
Sigma-Aldrich
Anti-AMPK α2 Antibody, Upstate®, from rabbit