Prostaglandin F(2)alpha enhances glucose consumption through neither adipocyte differentiation nor GLUT1 expression in 3T3-L1 cells.
Arachidonic acid (AA) at 0.2 mM enhances glucose uptake through increased levels of glucose transporter (GLUT) 1 protein in 3T3-L1 adipocytes. Since AA is a precursor of prostaglandins (PGs), we investigated the effect of PGs on glucose consumption in 3T3-L1 cells. Among several PGs, only prostaglandin F(2)alpha (PGF(2)alpha) enhanced glucose consumption in 3T3-L1 cells treated with dexamethasone (DEX), 3-isobutyl-1-methyl-xanthine (IBMX), and insulin. To study the mechanism of PGF(2)alpha-enhanced glucose consumption, we investigated the effect of PGF(2)alpha on glycerol-3-phosphate dehydrogenase (GPDH) activity, triglycerides (TGs) content, and the expression of GLUT1 protein. PGF(2)alpha suppressed GPDH activity and did not increase the expression of GLUT1 protein in 3T3-L1 cells treated with DEX, IBMX, and insulin. These results suggest that AA-stimulated glucose uptake is not through the effect of PGF(2)alpha. Our results indicate that PGF(2)alpha is a unique regulator of adipocyte differentiation (suppression) and glucose consumption (enhancement) in 3T3-L1 cells.
Kamon
J
J
Nissan Chemical Industries, Shiraoka Research Station of Biological Science, Saitama, Japan.
Naitoh
T
T
Kitahara
M
M
Tsuruzoe
N
N
D015056:1-Methyl-3-isobutylxanthine / Q000494:pharmacology; D016475:3T3 Cells; D017667:Adipocytes / Q000166:cytology* / Q000378:metabolism*; D000818:Animals; D015153:Blotting, Western; D002454:Cell Differentiation; D003907:Dexamethasone / Q000494:pharmacology; D015237:Dinoprost / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D005947:Glucose / Q000378:metabolism* / Q000493:pharmacokinetics*; D051272:Glucose Transporter Type 1; D005993:Glycerolphosphate Dehydrogenase / Q000378:metabolism; D007328:Insulin / Q000494:pharmacology; D051379:Mice; D009004:Monosaccharide Transport Proteins / Q000096:biosynthesis* / Q000378:metabolism; D014280:Triglycerides / Q000378:metabolism
D051272:Glucose Transporter Type 1; D007328:Insulin; D009004:Monosaccharide Transport Proteins; C495678:Slc2a1 protein, mouse; D014280:Triglycerides; D003907:Dexamethasone; D015237:Dinoprost; D005993:Glycerolphosphate Dehydrogenase; D005947:Glucose; D015056:1-Methyl-3-isobutylxanthine