(I-3,II-3)-Biacacetin-mediated cell death involves mitochondria.
Jyotsna Nambiar1, Gayathri Vijayakumar1, G Drishya1
1Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amrita University, Amritapuri, Clappana P.O, Kollam, Kerala, 690525, India.
Molecular and Cellular Biochemistry
|July 4, 2018
Summary
The biflavonoid biacacetin effectively induces cancer cell death through apoptosis, a process dependent on mitochondria. This compound shows promise as a novel anti-cancer therapeutic agent, sparing normal cells.
Area of Science:
- Biochemistry
- Molecular Biology
- Pharmacology
Background:
- Cancer arises from disrupted cell proliferation and death.
- Biflavonoids exhibit anti-proliferative effects on cancer cells.
Purpose of the Study:
- Investigate the anti-cancer mechanism of the biflavonoid biacacetin on MDA-MB-231 cells.
- Determine if biacacetin-induced cell death is mitochondria-dependent.
Main Methods:
- Dose-dependent cell death assays on MDA-MB-231 cells.
- Mitochondria-deficient cell viability tests.
- Fluorescence microscopy for apoptosis markers.
- Western blot analysis of apoptosis-related proteins (Caspase 3, p53, Bax, PARP-1).
- Assays on normal macrophage (RAW) and other cancer cell lines (OVISE, HT1080).
- 3D tumor spheroid cell death assessment.
Main Results:
- Biacacetin induced dose-dependent cell death in MDA-MB-231 cells, increasing sub-G1 population.
- Cell death was mitochondria-dependent.
- Apoptosis was confirmed by nuclear changes, apoptotic bodies, and regulation of Caspase 3, p53, Bax, and PARP-1.
- Biacacetin showed selectivity, not affecting normal RAW cells.
- It induced apoptosis in chemo-resistant OVISE and fibrosarcoma HT1080 cells.
- Significant cell death observed in 3D tumor spheroids.
Conclusions:
- Biacacetin triggers apoptosis in cancer cells via a mitochondria-dependent pathway.
- It demonstrates anti-cancer activity across various cancer types, including chemo-resistant lines.
- Biacacetin is a potential template for developing novel anti-cancer therapeutics.
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