Exposing a macrophage-like murine cell line to copper-oxidised low-density lipoprotein led to DNA fragmentation which was inhibited by the putative Ca2+/Mg2+ endonuclease inhibitor, zinc sulphate. DNA fragmentation preceded loss of membrane impermeability. These results suggest that apoptosis may be a mechanism of macrophage foam cell death in atherosclerotic lesions in the arterial wall.
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Reid et al. (1993) studied this question.
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