Phospholipase A2 activity in vitro cultured cells--influence of ascorbate supplementation.
Non-malignant LLCMK cells and malignant B16 cells were supplemented with ascorbate, over the concentration range 0-100 micrograms/ml ascorbate. The effects of ascorbate supplementation on cell growth and phospholipase A2 activity of the membrane fractions of the respective cell lines were determined. Increasing ascorbate supplementation had a significant inhibitory effect on the growth of the B16 cells. Phospholipase A2 activity in the control B16 cells was lower than that detected in the control LLCMK cells. Phospholipase A2 activity decreased significantly in the B16 cells upon increasing ascorbate supplementation, while the supplementation of ascorbate to the LLCMK cells did not have any significant effect on phospholipase A2 activity in these cells.
Stoll
K E
KE
Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, South Africa.
Duncan
J R
JR
D000818:Animals; D001205:Ascorbic Acid / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D004305:Dose-Response Relationship, Drug; D051379:Mice; D010741:Phospholipases A / Q000378:metabolism*; D054467:Phospholipases A2; D014407:Tumor Cells, Cultured
D010741:Phospholipases A; D054467:Phospholipases A2; D001205:Ascorbic Acid