[Caco 2 cell culture as intestinal epithelium model for hexose transport studying].
Distribution of SGLT1 and GLUT2 hexose transporters as well as that of fibrillar actin and tight junction proteins in cultured Caco2 cells incubated in medium with different hexose concentrations has been considered. Glucose absorption by the cells from incubation medium has been determined. Fibrillar actin was concentrated in the microvilli and closely to tight junction. The actin distribution was not dependent on the glucose concentration. There was no SGLT1 association with brush border actin and the transporter localization was not dependent on the concentration of hexose. GLUT2 was localized in the basal part of Caco2 cells after low concentration hexose load (2.5 mM). The transporter was colocalized with microvilli actin in the apical part of the cells after high concentration hexose load (25 mM). The tight junction proteins, occludin and claudin 1, 3, 4 were not dependent on glucose concentration. Claudin 2 was not detected in Caco2 cells. Caco2 cell culture can be used as a model for studying of hexose transport in small intestine epithelium.
N M
NM
Grefner
L V
LV
Gromova
A A
AA
Gruzdkov
Ia Iu
IaIu
Komissarchik
D000199:Actins / Q000378:metabolism; D001692:Biological Transport; D018938:Caco-2 Cells; D057167:Claudins / Q000378:metabolism; D015870:Gene Expression / Q000187:drug effects; D005947:Glucose / Q000378:metabolism* / Q000494:pharmacology*; D051273:Glucose Transporter Type 2 / Q000235:genetics / Q000378:metabolism; D006801:Humans; D066298:In Vitro Techniques; D007413:Intestinal Mucosa / Q000166:cytology* / Q000378:metabolism*; D008565:Membrane Proteins / Q000378:metabolism; D008871:Microvilli / Q000378:metabolism*; D062793:Occludin; D051269:Sodium-Glucose Transporter 1 / Q000235:genetics / Q000378:metabolism; D019108:Tight Junctions / Q000378:metabolism
D000199:Actins; D057167:Claudins; D051273:Glucose Transporter Type 2; D008565:Membrane Proteins; C568985:OCLN protein, human; D062793:Occludin; C495680:SLC2A2 protein, human; C495674:SLC5A1 protein, human; D051269:Sodium-Glucose Transporter 1; D005947:Glucose