title: Regulation of nervous system-specific S-100 protein and enolase levels in adipose tissue by catecholamines.
abstract: The effect of catecholamines on the levels of S-100 protein and nervous system-specific enolase (NSE) in epididymal adipose tissue of Wistar rats in vivo was examined by sensitive enzyme immunoassay methods. Soluble S-100 protein levels in the adipose tissue of 9-12-week-old rats (1.46 +/- 0.19 microgram/mg protein) were decreased to less than 50% of those of controls by serial injection (for 4-7 days) of epinephrine (0.1 mg/day) or norepinephrine (0.15 mg) with, however, little effect on the levels of membrane-bound (pentanol-extractable) S-100 protein. A significant decrease in the soluble S-100 protein levels was observed at 2 h after a single injection of epinephrine (1.04 +/- 0.13 microgram/mg protein). On the other hand, levels of NSE subunit (gamma subunit or 14-3-2 protein) in adipose tissue (0.51 +/- 0.03 gamma gamma-equivalent pmol/mg protein) were increased to 170% of control by serial injection (for 7 days) of epinephrine or norepinephrine with little change of the level of enolase alpha subunit on a mg protein basis. Isoproterenol had no apparent effect on the levels of soluble S-100 protein and NSE subunit. These results suggest that the levels of S-100 protein and NSE in adipose tissue are regulated by catecholamines.
mesh_terms: D000273:Adipose Tissue / Q000187:drug effects / Q000378:metabolism*; D000818:Animals; D002395:Catecholamines / Q000494:pharmacology*; D004837:Epinephrine / Q000494:pharmacology; D007124:Immunoenzyme Techniques; D007527:Isoenzymes / Q000378:metabolism; D007545:Isoproterenol / Q000494:pharmacology; D008297:Male; D009638:Norepinephrine / Q000494:pharmacology; D010751:Phosphopyruvate Hydratase / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D009418:S100 Proteins / Q000378:metabolism*
chemical_list: D002395:Catecholamines; D007527:Isoenzymes; D009418:S100 Proteins; D010751:Phosphopyruvate Hydratase; D007545:Isoproterenol; D009638:Norepinephrine; D004837:Epinephrine