Kalonji – Nigella is a small black seed, grown on Kalonji bushes. This plant originated in Turkey and/or Italy and is widely grown throughout India.
Thymoquinone (TQ) is a compound extracted from Black Caraway seeds of Nigella Sativa and is active against various cancers. Cisplatin (CDDP) is the most active chemotherapeutic agent in Lung Cancer.
Here we report activity of TQ against non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC) cell lines alone and in combination with Cisplatin (CDDP).
Methods: For proliferation MTT assay, cell viability trypan blue assay and for apoptosis Annexin-V FITC assay were used in NCI-H460 and NCI-H146 cell lines. Inhibition of invasion by TQ was assessed using Matrigel assay and its affect on release of various cytokines was determined using RayBio Human Cytokine detection kit.
Mouse xenograft model using NCI-H460 was used to determine in vivo activity of TQ and CDDP. Inhibition of LPS induced NF-Kappa B expression by TQ was determined using transgenic mice expressing a luciferase reporter.
Results: TQ was able to inhibit cell proliferation, reduce cell viability and induce apoptosis.
TQ at 100 uM and CDDP at 5 uM inhibited cell proliferation by nearly 90% and the combination showed synergism. TQ was able to induced apoptosis in both NCI-H460 and NCI-H146 cell lines.
TQ also appears to affect the extracellular environment inhibiting invasion and reducing the production of two cytokines ENA-78 and Gro-alpha which are involved in neo-angiogenesis. Using a mouse xenograft model we were able to demonstrate that combination of TQ and CDDP was well tolerated and significantly reduced tumor volume and tumor weight without additional toxicity to the mice.
In the combination arms (TQ5mg/kg/Cis 2.5mg/kg) tumor volume was reduced by 59% and (TQ20mg/kg /Cis 2.5mg/kg) by 79% as compared to control which is consistent with in vitro data. TQ down regulated NF-Kappa-B expression which may explain its various cellular activities and this activity may prove useful in overcoming CDDP resistance from over expression of NF-Kappa-B.
Conclusion: Thus TQ and CDDP appear to be an active therapeutic combination in lung cancer.
Author: Syed JafriJonathan GlassRunhua ShiSonglin ZhangMisty PrinceHeather Kleiner-Hancock
Credits/Source: Journal of Experimental &Clinical Cancer Research 2010, 29:87
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