Have any preclinical (laboratory or animal) studies been conducted usingCannabis or cannabinoids?

Preclinical studies of cannabinoids have investigated the following activities:

Antitumor activity

  • Studies in mice and rats have shown that cannabinoids may inhibit tumor growth by causing cell death, blocking cell growth, and blocking the development of blood vessels needed by tumors to grow. Laboratory andanimal studies have shown that cannabinoids may be able to kill cancer cells while protecting normal cells.
  • A study in mice showed that cannabinoids may protect against inflammation of the colon and may have potential in reducing the risk of colon cancer, and possibly in its treatment.
  • A laboratory study of delta-9-THC in hepatocellular carcinoma (liver cancer) cells showed that it damaged or killed the cancer cells. The same study of delta-9-THC in mouse models of liver cancer showed that it had antitumoreffects. Delta-9-THC has been shown to cause these effects by acting on molecules that may also be found in non-small cell lung cancer cells and breast cancer cells.
  • A laboratory study of cannabidiol (CBD) in estrogen receptor positive andestrogen receptor negative breast cancer cells showed that it caused cancer cell death while having little effect on normal breast cells. Studies in mouse models of metastatic breast cancer showed that cannabinoids may lessen the growth, number, and spread of tumors.

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