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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Jayasooriya, Rajapaksha Gedara Prasad Tharanga Moon, Dong-Oh Park, Sang Rul Choi, Yung Hyun Asami, Yukihiro Kim, Mun-Ock Jang, Jae-Hyuk Kim, Bo Yeon Ahn, Jong Seog Kim, Gi-Young |
| Description | Author Affiliation: Jayasooriya RG ( Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Ara-1 dong, Jeju 690-756, Republic of Korea.) |
| Abstract | Verrucarin A (VA) is a member of the family of macrocyclic trichothecenes, which exhibit anti-cancer and immune-modulating activities. However, VA has not yet been demonstrated to be involved in the sensitization of tumor necrosis factor-alpha (TNF- )-mediated apoptosis. In the present study, we found that VA triggers TNF- -induced apoptosis in human breast cancer MDA-MB-231 and MCF-7 cells. In particular, activation of caspas-3 and caspase-8 as well as release of cytochrome c were significantly enhanced in response to the combined treatment with VA and TNF- (VA/TNF- ) and the pan-caspase inhibitor z-VAD-fmk completely reversed the apoptosis, suggesting that caspases are the main effector molecules in VA/TNF- -induced apoptosis via the intrinsic and extrinsic pathway. Moreover, we confirmed that enhanced Fas expression plays a critical role, because the Fas-blocking antibody partially inhibited VA/TNF- -induced apoptosis. VA also increased specific DNA-binding activity of nuclear factor-kappaB (NF-κB) via nuclear translocation of p50 and p65. In addition, pretreatment with the NF-κB inhibitor MG132 blocked VA/TNF- -induced apoptosis by suppression of NF-κB-dependent Fas expression. These results indicated that VA enhances TNF- -induced apoptosis via NF-κB-dependent Fas overexpression. |
| File Format | HTM / HTML |
| ISSN | 13826689 |
| Issue Number | 2 |
| Volume Number | 36 |
| e-ISSN | 18727077 |
| Journal | Environmental Toxicology and Pharmacology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-09-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Health Discipline Pharmacology Antigens, Cd95 Metabolism Antineoplastic Combined Chemotherapy Protocols Pharmacology Apoptosis Drug Effects Breast Neoplasms Nf-kappa B Active Transport, Cell Nucleus Antibodies Antagonists & Inhibitors Pathology Caspase 3 Caspase 8 Caspase Inhibitors Cytochromes c Dose-response Relationship, Drug Female Humans Mcf-7 Cells Nf-kappa B P50 Subunit Signal Transduction Time Factors Transcription Factor Rela Trichothecenes Tumor Necrosis Factor-alpha Up-regulation Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Medicine Toxicology Pharmacology |
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