BackgroundChemoprevention, which includes the use of synthetic or natural agents (alone or in combination) to block the development of cancer in human beings, is an extremely promising strategy for cancer prevention. Cinnamon is one of the most widely used herbal medicines with diverse biological activities including anti-tumor activity. In the present study, we have reported the anti-neoplastic activity of cinnamon in cervical cancer cell line, SiHa.MethodsThe aqueous cinnamon extract (ACE-c) was analyzed for its cinnamaldehyde content by HPTLC analysis. The polyphenol content of ACE-c was measured by Folin-Ciocalteau method. Cytotoxicity analysis was performed by MTT assay. We studied the effect of cinnamon on growth kinetics by performing growth curve, colony formation and soft agar assays. The cells treated with ACE-c were analyzed for wound healing assay as well as for matrix metalloproteinase-2 (MMP-2) expression at mRNA and protein level by RT-PCR and zymography, respectively. Her-2 protein expression was analyzed in the control and ACE-c treated samples by immunoblotting as well as confocal microscopy. Apoptosis studies and calcium signaling assays were analyzed by FACS. Loss of mitochondrial membrane potential (Δψm) in cinnamon treated cells was studied by JC-1 staining and analyzed by confocal microscopy as well as FACS.ResultsCinnamon alters the growth kinetics of SiHa cells in a dose-dependent manner. Cells treated with ACE-c exhibited reduced number of colonies compared to the control cells. The treated cells exhibited reduced migration potential that could be explained due to downregulation of MMP-2 expression. Interestingly, the expression of Her-2 oncoprotein was significantly reduced in the presence of ACE-c. Cinnamon extract induced apoptosis in the cervical cancer cells through increase in intracellular calcium signaling as well as loss of mitochondrial membrane potential.ConclusionCinnamon could be used as a potent chemopreventive drug in cervical cancer.
Natural products are being extensively explored for their potential to prevent as well as treat cancer due to their ability to target multiple molecular pathways. Ficus religiosa has been shown to exert diverse biological activities including apoptosis in breast cancer cell lines. In the present study, we report the anti-neoplastic potential of aqueous extract of F. religiosa (FRaq) bark in human cervical cancer cell lines, SiHa and HeLa. FRaq altered the growth kinetics of SiHa (HPV-16 positive) and HeLa (HPV-18 positive) cells in a dose-dependent manner. It blocked the cell cycle progression at G1/S phase in SiHa that was characterized by an increase in the expression of p53, p21 and pRb proteins with a simultaneous decrease in the expression of phospho Rb (ppRb) protein. On the other hand, in HeLa, FRaq induced apoptosis through an increase in intracellular Ca2+ leading to loss of mitochondrial membrane potential, release of cytochrome-c and increase in the expression of caspase-3. Moreover, FRaq reduced the migration as well as invasion capability of both the cervical cancer cell lines accompanied with downregulation of MMP-2 and Her-2 expression. Interestingly, FRaq reduced the expression of viral oncoproteins E6 and E7 in both the cervical cancer cell lines. All these data suggest that F. religiosa could be explored for its chemopreventive potential in cervical cancer.
Introduction: The present study aims to standardize a polyherbal formulation (HC9) that was previously shown to exhibit excellent antioxidant and cytotoxic activity in breast cancer cells. Here, we have compared the cytotoxic activity of HC9 with its individual components in breast cancer and non-cancerous cells. Methods: Physico-chemical and phytochemical evaluation of HC9 was performed. Qualitative and quantitative HPTLC analysis of component herbs and HC9 was done by using specific markers. The cytotoxic activity of HC9 with its individual components was evaluated in breast cancer (MCF-7 and MDA MB-231) and non-cancerous cell lines (HEK-293, HaCaT and MCF-10A) by MTT dye uptake. Results: Physico-chemical results revealed that HC9 contained 7.24% total ash content, 9.52% of alcohol-soluble extractive, 0.801 specific gravity, 0.50g/ml bulk density and exhibited 7.18% loss on drying. Phytochemical results revealed the presence of alkaloids, carbohydrates, flavanoids, saponins, tannins and phenolic compounds, and absence of terpenoids. The individual herbs of HC9 and the formulation showed the presence of marker compounds such as picroside-I, nootkatone, 6-gingerol, matairesinol, swertiamarin, berberine, connesine and 2-hydroxy-4-methoxybenzaldehyde. At 160µg/ml concentration, HC9 exhibited cytotoxicity in both MCF7 and MDA MB231 with no cytotoxicity in MCF-10A, HaCaT and HEK-293. In contrast, at this concentration, the individual herbs of HC9 exhibited cytotoxicity not only in cancerous cells, but also in non-cancerous cells. Conclusion: These results suggest that the standardized HC9 formulation was safe to non-cancerous cells and exhibited significant antineoplastic potential in breast cancer cells. Thus, HC9 could be a potential drug candidate in breast cancer.
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