Abstract
Skin is usually exposed to adverse environmental conditions that may cause pathological cell proliferation and malignant transformation. Antioxidants are able to affect these processes and eliminate transformed cells. The purpose of this work was to investigate the effect of α-lipoic acid (ALA) on human epidermoid carcinoma cell line A431. It was found that 100, 200, 300, 500 μM ALA added for 24, 48, 72 h inhibited cell proliferation and stimulated apoptosis. Most dying cells have abnormal nuclei (micronuclei, giant nuclei, nuclei with buds). Electron microscopy showed that cells with normal nuclear phenotypes after treatment with 200 μM ALA for 48 h had ultrastructural organizations typical for control cells. Thus, α-ALA not only triggers the apoptosis of carcinoma cells, but it may also activate the mechanism for eliminating cells with abnormal numbers of chromosomes.
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