Tyrosine phosphorylation of a 58 kDa protein induced by morphine in SK-N-SH cells.
A 58 kDa protein which was phosphorylated on tyrosine residues with morphine was found in human neuroblastoma cells (SK-N-SH cells) by immunoblot with monoclonal anti-phosphotyrosine antibody. The tyrosine phosphorylation was induced by morphine in 5 min in a dose-dependent manner and the increment was completely inhibited by naloxone. A Delta (d) agonist, [D-Pen2,Pen5]-enkephalin (DPDPE), but not a m agonist, [D-Ala2,N-Me-Phe,Gly5-ol]-enkephalin (DAGO), stimulated the phosphorylation and treatment of the cells with pertussis toxin inhibited the phosphorylation by morphine. These data suggest that d receptor-stimulation increases tyrosine phosphorylation of the 58 kDa protein through Gi protein in SK-N-SH cells.
Nakano
K
K
Department of Pharmacology, Osaka University School of Medicine, Japan.
Osugi
T
T
Kuo
C H
CH
Higuchi
H
H
Miki
N
N
D002460:Cell Line; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; D020881:Enkephalin, D-Penicillamine (2,5)-; D004745:Enkephalins / Q000494:pharmacology; D019204:GTP-Binding Proteins / Q000378:metabolism; D006801:Humans; D007700:Kinetics; D008970:Molecular Weight; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D009419:Nerve Tissue Proteins / Q000737:chemistry / Q000378:metabolism*; D037342:Pertussis Toxin; D010766:Phosphorylation / Q000187:drug effects; D017465:Receptors, Opioid, delta / Q000187:drug effects / Q000378:metabolism; D017450:Receptors, Opioid, mu / Q000187:drug effects / Q000378:metabolism; D015398:Signal Transduction; D014443:Tyrosine / Q000378:metabolism*; D010566:Virulence Factors, Bordetella / Q000494:pharmacology
D004745:Enkephalins; D009419:Nerve Tissue Proteins; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu; D010566:Virulence Factors, Bordetella; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; D009270:Naloxone; D014443:Tyrosine; D009020:Morphine; D020881:Enkephalin, D-Penicillamine (2,5)-; D037342:Pertussis Toxin; D019204:GTP-Binding Proteins