Pro-Apoptotic Effect of Grape Seed Extract on MCF-7 Involves Transient Increase of Gap Junction Intercellular Communication and Cx43 Up-Regulation: A Mechanism of Chemoprevention
Abstract
:1. Introduction
2. Results
2.1. GSE Extraction, Characterization and Antioxidant Activity
2.2. Effect on Cell Viability
Apoptosis
2.3. Effect on GJIC
2.3.1. GJIC Functionality
2.3.2. Western blot Analysis of Cx43 Protein
2.3.3. Cx43 Localization
2.3.4. Cx43 mRNA Expression
3. Discussion
4. Materials and Methods
4.1. Source of Material
4.2. Extraction
4.3. Total Phenols
4.4. HPLC Analysis
4.5. Antioxidant Activity
4.6. Cell Cultures
4.7. Cell Viability and Treatments
4.8. Apoptosis
4.9. Estimation of GJIC by Scrape-Loading/Dye-Transfer (SL/DT) Assay
4.10. Western Blot Analisys of Connexin 43
4.11. Immunohistochemistry and Confocal Microscopy
4.12. Extraction of mRNA from MCF-7 Cells Treated with GSE
4.13. Quantitative Real-Time PCR
4.14. Statistical Analysis
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
Abbreviations
GJIC | Gap-junction-intercellular communications |
Cx43 | Connexin-43 protein |
cx43 | Connexin-43 gene |
TEAC | Trolox Equivalent Antioxidant Capacity |
SL/DT | Scrape-Loading/Dye-Transfer assay |
GSE | Grape seeds extracts |
GAE | Gallic Acid Equivalents |
ROS | Reactive oxygen species |
TE | Trolox Equivalents |
GS | Grape Seeds |
GJ | Gap junction |
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GSE Samples | Total Phenols | Antioxidant Activity | |
---|---|---|---|
g of GAE/100 g GS ± DS | mol TE/GAE ± DS | mol TE/100 g GS ± DS | |
GSE methanol:water (80:20) | 1.64 ± 0.04 | 7.07 ± 0.54 | 11.6 ± 0.5 |
GSE ethanol:water (80:20) | 0.55 ± 0.02 | 5.87 ± 0.70 | 3.3 ± 0.1 |
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Leone, A.; Longo, C.; Gerardi, C.; Trosko, J.E. Pro-Apoptotic Effect of Grape Seed Extract on MCF-7 Involves Transient Increase of Gap Junction Intercellular Communication and Cx43 Up-Regulation: A Mechanism of Chemoprevention. Int. J. Mol. Sci. 2019, 20, 3244. https://doi.org/10.3390/ijms20133244
Leone A, Longo C, Gerardi C, Trosko JE. Pro-Apoptotic Effect of Grape Seed Extract on MCF-7 Involves Transient Increase of Gap Junction Intercellular Communication and Cx43 Up-Regulation: A Mechanism of Chemoprevention. International Journal of Molecular Sciences. 2019; 20(13):3244. https://doi.org/10.3390/ijms20133244
Chicago/Turabian StyleLeone, Antonella, Cristiano Longo, Carmela Gerardi, and James E. Trosko. 2019. "Pro-Apoptotic Effect of Grape Seed Extract on MCF-7 Involves Transient Increase of Gap Junction Intercellular Communication and Cx43 Up-Regulation: A Mechanism of Chemoprevention" International Journal of Molecular Sciences 20, no. 13: 3244. https://doi.org/10.3390/ijms20133244