Effect of polyamines on mesangial cell ecto-5'-nucleotidase and ecto-ATPase activity.
Polyamines were found to modulate the activity of several membrane-bound enzymes, participating in cell growth and differentiation. We have studied the effect of polyamines (spermidine, spermine and putrescine) on rat mesangial cell ectoenzymes: 5'-nucleotidase, Mg(2+)-ATPase and Ca(2+)-ATPase. Ecto-5'-nucleotidase activity was significantly increased after 48 h treatment with spermine and spermidine. Mg(2+)-ATPase was increased only after treatment with spermidine; however, Ca(2+)-ATPase was significantly increased after both spermine and spermidine treatment of mesangial cells. Culture of mesangial cells with putrescine did not change the activity of these ectoenzymes. Increased expression of mesangial cell ecto-ATPase and ecto-5'-nucleotidase after spermine and spermidine treatment could result in an increased production of adenosine, a powerful autacoid interesting with respect to a role of mesangial cells in inflammatory processes.
Institute of Nephrology and Hemodialysis, Faculty of Medicine, Nis, Yugoslavia. stefan@ni.ac.yu
Vladisav
V
Stefanović
Marina
M
Mitić-Zlatković
Vojin
V
Savić
Predrag
P
Vlahović
D015720:5'-Nucleotidase / Q000378:metabolism*; D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D002478:Cells, Cultured; D004789:Enzyme Activation / Q000187:drug effects; D005920:Glomerular Mesangium / Q000166:cytology / Q000201:enzymology*; D011073:Polyamines / Q000494:pharmacology*; D051381:Rats
D011073:Polyamines; D015720:5'-Nucleotidase; D000251:Adenosine Triphosphatases; C027201:ectoATPase