phosphatidylethanol and Necrosis

Phospholipases generate important secondary messengers in several cellular processes, including cell death. Tumor necrosis factor (TNF) can induce two distinct modes of cell death, viz. necrosis and apoptosis. Here we demonstrate that phospholipase D (PLD) and cytosolic phospholipase A2 (cPLA2) are differentially activated during TNF-induced necrosis or apoptosis. Moreover, a comparative study using TNF and anti-Fas antibodies as cell death stimuli showed that PLD and cPLA2 are specifically activated by TNF. These results indicate that both the mode of cell death and the type of death stimulus determine the potential role of phospholipases as generators of secondary messengers.

Topics: Animals; Antibodies; Apoptosis; Arachidonic Acid; Calcimycin; Cell Cycle; Enzyme Activation; fas Receptor; Glycerophospholipids; Humans; Mice; Necrosis; Phospholipase D; Phospholipases; Phospholipases A; Phospholipases A2; Phosphorylation; Ploidies; Tetradecanoylphorbol Acetate; Tumor Cells, Cultured; Tumor Necrosis Factor-alpha