1-Trans-[delta.sup.9]-tetrahydrocannabinol (THC THC tetrahydrocannabinol.
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THC
n.
Tetrahydrocannabinol; a compound that is obtained from cannabis or is made synthetically; it is the primary intoxicant in marijuana and hashish. ), the main active component of marijuana, has been shown to exhibit anticancer activity (1,2). Galve-Roperh et al. (1) reported that intratumoral administration of THC induces apoptosis of transformed neural cells in culture, and also induces a considerable regression of malignant gliomas in Wistar rats and in mice deficient in recombination activating geneThe recombination activating genes encode enzymes that play an important role in the rearrangement and recombination of the genes of immunoglobulin and T cell receptor molecules during the process of VDJ recombination.
..... Click the link for more information. 2. These authors suggest that their "results may provide the basis for a new therapeutic approach for the treatment of malignant gliomas." Regarding this interesting finding, we believe it is important to highlight the previous National Toxicology Program's long-term in vivo bioassay Bioassay

A method for the quantitation of the effects on a biological system by its exposure to a substance, as well as the quantitation of the concentration of a substance by some observable effect on a biological system. results that showed definite antitumor an·ti·tu·mor also an·ti·tu·mor·al
adj.
Counteracting or preventing the formation of malignant tumors; anticancer.

Adj. 1. activity of THC (3,4). This also appears relevant to the current controversy, at least in the United States, regarding the use of marijuana in clinical medicine. more
http://www.thefreelibrary.com/Antitumor+Effects+of+THC-a068148345