Anticarcinogen

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Overview

An anticarcinogen is any chemical which reduces the occurrence of cancers, reduces the severity of cancers that do occur, or acts against cancers that do occur, based on evidence from in vitro studies, animal models, epidemiological studies and/or clinical studies.

Preventative anticarcinogens act by enhancing an organism's natural defenses against cancer, by deactivating carcinogens or by blocking the mechanisms by which carcinogens act (such as free radical damage to DNA).

Anticarcinoma agents participate in the selective destruction of cancer cells, or inhibit the growth and proliferation of cancer cells.

Interest in preventative anticarcinogens is motivated primarily by the principle that it is preferable to prevent disease where possible, and that positive actions can be effective as well as negative ones (such as reducing exposure to known carcinogens). Anticarcinoma agents that do not have significant negative side effects have a similar potential role, by reducing the seriousness of any cancers that do occur.

Known anticarcinogens

There is epidemiological evidence that a diet rich in antioxidant vitamins and flavonoids is anticarcinogenic. Interest in many popular nutritional supplements, including essential antioxidant nutrients such as selenium compounds and hormones such as melatonin and DHEA, is partly motivated by evidence that these have significant anticarcinogenic effects in appropriate quantities. The major psychoactive component in marijuana, tetrahydrocannabinol, has been shown to have anticarcinogenic activity.[1] The other major component of cannabis - cannabidiol, has also been shown to inhibit cancer cell growth, with low potency in non-cancer cells. Although the inhibitory mechanism is not yet fully understood, Ligresti et al suggest that "cannabidiol exerts its effects on these cells through a combination of mechanisms that include either direct or indirect activation of CB2 and TRPV1 receptors, and induction of oxidative stress, all contributing to induce apoptosis."[2]

References

  1. Chan PC, Sills RC, Braun AG, Haseman JK, Bucher JR (1996). "Toxicity and carcinogenicity of delta 9-tetrahydrocannabinol in Fischer rats and B6C3F1 mice". Fundamental and applied toxicology : official journal of the Society of Toxicology. 30 (1): 109–17. PMID 8812248.
  2. Ligresti, Alessia (2006-05-25). "Anti-tumor activity of plant cannabinoids with emphasis on the effect of cannabidiol on human breast carcinoma". Journal of Pharmacology and Experimental Therapeutics. American Society of Pharmacology and Experimental Therapeutics. Fast Forward (May 2006): 50. doi:10.1124 Check |doi= value (help). jpet.106.105247. Retrieved 2007-05-03. Unknown parameter |coauthors= ignored (help); line feed character in |title= at position 47 (help)

See also

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