1. The apoptotic effects of mitomycin C on human endometrial cell cultures and reversal of its effects by beta-carotene and folic acid
- Author
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Atac Fb, Zerrin Yilmaz, Take G, Oktem M, Sahin Fi, and Karabay G
- Subjects
Stromal cell ,Mitomycin ,Cell ,Apoptosis ,Biology ,Antioxidants ,Endometrium ,Folic Acid ,Microscopy, Electron, Transmission ,beta-Carotene ,Physiology (medical) ,medicine ,Humans ,Cells, Cultured ,Antibiotics, Antineoplastic ,Mitomycin C ,General Medicine ,beta Carotene ,medicine.anatomical_structure ,Biochemistry ,Folic acid ,Vitamin B Complex ,Cancer research ,Ultrastructure ,DNA fragmentation ,Female - Abstract
Apoptosis is a complex process involving a variety of mechanisms and it has been shown to be a response of cells to various chemical agents including chemotherapeutic ones. We aimed to induce DNA breaks and apoptosis in cultured endometrial stromal cells by mitomycin C (MMC), a chemotherapeutic agent, and also we aimed to observe the effects of beta-carotene and folic acid on MMC-induced apoptosis. Cultured endometrial stromal cells were exposed to MMC for 48 and 72 hours and in order to reverse MMC effects, we added beta-carotene and folic acid to the cultures. DNA fragmentation was observed in all cells. Apoptotic cell ratios and caspase-3 activity were observed to be dependent on exposure time. Ultrastructural examinations revealed positive effects of beta-carotene and folic acid, however they were not sufficient enough to prevent apoptosis in all cells. Beta-carotene profoundy reduced caspase-3 activity whereas folic acid did not seem to have a similar effect. As apoptosis involves several mechanisms, in a cell in which all these mechanisms are triggered, we think that antioxidants and DNA repair agents alone are not enough to reverse all of them.
- Published
- 2006