[QUOTE="drj077"][QUOTE="AirGuitarist87"] I've never heard that before. I know it is a pain-killer that many cancer patients use, but I've never heard it can kill cancer. In fact, it's got a higher likelihood of causing cancer than tobacco smoke.xxDustmanxx
Cannabis is an immuno-modulator and a cancer preventative in the lungs it seems. Unfortunately, the impurities in the rest of the marijuana inhaled can overpower those effects. However, in breast cancer, the substance actually increases tumor growth and metastasis.
Thats wierd, i read somewhere that cannibinoids inhibit certain brain tumors as well as breast cancer.J Immunol. 2005 Mar 15;174(6):3281-9.
Delta-9-tetrahydrocannabinol enhances breast cancer growth and metastasis by suppression of the antitumor immune response.
McKallip RJ, Nagarkatti M, Nagarkatti PS. Department of Microbiology and Immunology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA 23298, USA. rjmckall@hsc.vcu.edu
In the current study, we tested the central hypothesis that exposure to Delta-9-tetrahydrocannabinol (Delta9-THC), the major psychoactive component in marijuana, can lead to enhanced growth of tumors that express low to undetectable levels of cannabinoid receptors by specifically suppressing the antitumor immune response. We demonstrated that the human breast cancer cell lines MCF-7 and MDA-MB-231 and the mouse mammary carcinoma 4T1 express low to undetectable levels of cannabinoid receptors, CB1 and CB2, and that these cells are resistant to Delta9-THC-induced cytotoxicity. Furthermore, exposure of mice to Delta9-THC led to significantly elevated 4T1 tumor growth and metastasis due to inhibition of the specific antitumor immune response in vivo. The suppression of the antitumor immune response was mediated primarily through CB2 as opposed to CB1. Furthermore, exposure to Delta9-THC led to increased production of IL-4 and IL-10, suggesting that Delta9-THC exposure may specifically suppress the cell-mediated Th1 response by enhancing Th2-associated cytokines. This possibility was further supported by microarray data demonstrating the up-regulation of a number of Th2-related genes and the down-regulation of a number of Th1-related genes following exposure to Delta9-THC. Finally, injection of anti-IL-4 and anti-IL-10 mAbs led to a partial reversal of the Delta9-THC-induced suppression of the immune response to 4T1. Such findings suggest that marijuana exposure either recreationally or medicinally may increase the susceptibility to and/or incidence of breast cancer as well as other cancers that do not express cannabinoid receptors and are resistant to Delta9-THC-induced apoptosis.
It also seems to depend on the receptor response and the dosage. High doses of THC like that which would be required in cancer treatment is incredibly psychotropic.
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