Figure 5From: Toxicity of oxidized phospholipids in cultured macrophagesApoptotic effects of oxPL in RAW264.7 cells and BMM. Cells were incubated with the indicated concentrations of oxPLs in media under low serum conditions (0,1% FCS) for 4 h and analyzed by flow cytometry (see materials and methods). The fraction of apoptotic cells was determined from Annexin V staining of externalized phosphatidylserine. Control cells were incubated with 1% v/v Ethanol (EtOH). 2,5 mM H2O2 or 1 Ī¼M staurosporin (STS) in the incubation media, which were used as reference agents inducing necrosis or apoptosis, respectively. Panel A: 50 Ī¼M POVPC and PGPC induce apoptosis in RAW264.7 macrophages. PGPC is a more potent inducer of cell death than POVPC under these conditions. Results are means of 6 replicates out of three independent experiments. Panel B: 50 Ī¼M PGPC and POVPC induce apoptosis in BMM, which are slightly more sensitive to the oxPL compared with RAW264.7 macrophages. Results are means from one representative experiment of 4 replicates of one pooled sample (BMM isolated and pooled from femurs and tibias of 5 mice, see materials and methods). Panel C: 50 Ī¼M 1-O-alkyl ether analogs of PGPC and POVPC (E-PGPC and E-POVPC, respectively) induce apoptosis in RAW264.7 macrophages. Panel D: Representative histogram of RAW264.7 cells after exposure to 1% v/v Ethanol (EtOH), 1 Ī¼M staurosporin (STS), POVPC or PGPC. Experimental conditions as described under Panel A. All Results are expressed as means +/ā SD. Significance was determined by Studentās t-test (two tailed, unpaired). ** pāā¤ā0,01, *** pāā¤ā0,005.Back to article page