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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Liao, Peng Liu, Wensen Li, Hongyang Gao, Hongwei Wang, Haiying Li, Nan Xu, Na Li, Jiping Wan, Jiayu Liu, Linna Sun, Yucheng |
| Description | Country affiliation: China Author Affiliation: Liao P ( College of Animal Science and Veterinary Medicine, Jilin University, Jilin, China.) |
| Abstract | The morphological changes of ricin-induced apoptosis in a human cervical cancer cell line were studied. To shed light on the mechanism of action of ricin toxin (RT) at the cellular level, we examined cell growth, apoptosis, changes of mitochondrial membrane potential (MMP) and cytochrome C translocation in HeLa cells by exposing these cells to RT for indicated times. The effect of RT on cell proliferation was measured by 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS), inner salt; MTS assay and apoptosis were measured using flow cytometry, fluorescence microscopy and electron microscopy. Changes in MMP were monitored using flow cytometry. Western blot analysis was used to evaluate the release of mitochondrial cytochrome C. RT noticeably inhibited the proliferation of HeLa cells, and the half maximal inhibitory concentration dose was about 100 ng/ml. HeLa cells treated with RT showed typical characteristics of apoptosis rather than necrosis, including phosphatidylserine exposed from the inner to the outer leaflet of the plasma membrane, abnormal cell morphology, chromatin condensation and nuclear fragmentation. In contrast, during the process of cellular apoptosis, the messenger RNA (mRNA) and protein expression of cytochrome C in treated and untreated Hela cells were not significantly changed (data not shown). However, when cells were treated with RT, the massive translocation of cytochrome C to the nucleus was evident. Our results indicate that RT-induced HeLa cell apoptosis, especially for cytochrome C translocation, may play an important role in apoptosis induced by RT. |
| File Format | HTM / HTML |
| ISSN | 07482337 |
| Issue Number | 5 |
| Volume Number | 28 |
| e-ISSN | 14770393 |
| Journal | Toxicology and Industrial Health |
| Language | English |
| Publisher | Sage Publications |
| Publisher Date | 2012-06-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Occupational Medicine Discipline Toxicology Apoptosis Drug Effects Ricin Toxicity Blotting, Western Cell Nucleus Chromatin Chemistry Metabolism Cytochromes c Flow Cytometry Hela Cells Humans Membrane Potential, Mitochondrial Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Public Health, Environmental and Occupational Health Toxicology |
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