Apoptotic effect of Semecarpus anacardium nut extract on T47D breast cancer cell line
Panneerselvam Mathivadhani1, Palanivelu Shanthi, Panchanatham Sachdanandam
1Department of Medical Biochemistry, Dr. A.L. Mudaliar Post-Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai 600 113, India.
Abstract:
There is an increasing interest in identifying potent cancer-preventive and therapeutic agents against breast cancer. A great number of reports have in recent years dealt with anticancer characteristics of Semecarpus anacardium nut extract (SA). The majority of these studies has been targeted on the protective effect rendered to the living system rather than the preventive effect on cancer cells. SA was tested for its inhibitory effect on human breast cancer cells (T47D). Cytotoxicity analyses suggested that these cells had become apoptotic. SA was discovered to induce rapid Ca(2+) mobilization from intracellular stores of T47D cell line, and its cytotoxicity against T47D was well correlated with altered mitochondrial transmembrane potential. At the molecular level, these changes are accompanied by decrease in bcl(2) and increase in bax, cytochrome c, caspases and PARP cleavage, and ultimately by internucleosomal DNA fragmentation. Taken together, our results provide unprecedented evidence that SA triggers apoptotic signals in T47D cells.
Insights
Semecarpus anacardium nut extract (SA) induces programmed cell death (apoptosis) in human breast cancer cells. This natural compound triggers key molecular events leading to cancer cell demise.
Area of Science:
- Phytochemistry
- Molecular Biology
- Oncology
Background:
- Increasing interest in natural compounds for breast cancer prevention and therapy.
- Semecarpus anacardium nut extract (SA) shows known anticancer properties.
- Previous studies focused on systemic protection rather than direct cancer cell effects.
Purpose of the Study:
- To investigate the direct inhibitory effect of SA on human breast cancer cells (T47D).
- To elucidate the molecular mechanisms underlying SA's cytotoxicity in breast cancer.
Main Methods:
- In vitro testing of SA on T47D human breast cancer cell line.
- Cytotoxicity assays to assess cell death.
- Analysis of intracellular calcium (Ca2+) mobilization.
- Mitochondrial transmembrane potential assessment.
- Western blotting for apoptosis-related proteins (bcl-2, bax, cytochrome c, caspases, PARP).
- DNA fragmentation assays.
Main Results:
- SA induced apoptosis in T47D cells.
- SA triggered rapid Ca2+ release from intracellular stores.
- Cytotoxicity correlated with altered mitochondrial membrane potential.
- Molecular analysis revealed decreased bcl-2, increased bax, cytochrome c release, caspase activation, PARP cleavage, and DNA fragmentation.
Conclusions:
- SA effectively triggers apoptotic signaling pathways in T47D human breast cancer cells.
- SA demonstrates potential as a therapeutic agent by inducing programmed cell death in breast cancer.
- The study provides evidence for SA's mechanism of action at the molecular level.
