Abstract | BACKGROUND: METHODS: Uptake of TAT- BID protein by cells was studied by quantitative Western blot analysis of cells extracts. Cells viability was monitored by MTT test. Apoptosis was detected by flow cytometry and cytochrome c release assay. RESULTS: TAT-BID was delivered to all cancer cells in amounts depending on time, dose and the cell line. Recombinant BID sensitized PC3 cells to TRAIL or, to lesser extent, to camptothecin. Out of remaining cells, TAT-BID sensitized A549, and only slightly HeLa cells to TRAIL. None of the latter cell lines were sensitized to camptothecin. In all cases the mutant not phosphorylable by CK2 (TAT-BIDT59AS76A) was similarly efficient in sensitization as the wild type TAT-BID. CONCLUSIONS: TAT-BID may be delivered to cancer cells in controlled manner and efficiently sensitizes PC3 and A549 cells to TRAIL. Therefore, it may be considered as a potential therapeutic agent that enhances the efficacy of TRAIL for the treatment of prostate and non-small human lung cancer.
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Authors | Emilia Joanna Orzechowska, Ewa Kozlowska, Alicja Czubaty, Piotr Kozlowski, Krzysztof Staron, Joanna Trzcinska-Danielewicz |
Journal | BMC cancer
(BMC Cancer)
Vol. 14
Pg. 771
(Oct 18 2014)
ISSN: 1471-2407 [Electronic] England |
PMID | 25326334
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- BH3 Interacting Domain Death Agonist Protein
- Peptide Fragments
- Recombinant Fusion Proteins
- TNF-Related Apoptosis-Inducing Ligand
- tat Gene Products, Human Immunodeficiency Virus
- Cytochromes c
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Topics |
- Apoptosis
(drug effects, genetics)
- BH3 Interacting Domain Death Agonist Protein
(genetics)
- Cell Line, Tumor
- Cell Survival
(drug effects)
- Cytochromes c
(metabolism)
- Dose-Response Relationship, Drug
- Humans
- Mitochondria
(drug effects, metabolism)
- Peptide Fragments
(genetics)
- Recombinant Fusion Proteins
(genetics, pharmacology)
- TNF-Related Apoptosis-Inducing Ligand
(pharmacology)
- Time Factors
- tat Gene Products, Human Immunodeficiency Virus
(genetics)
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