FAAH and lung cancer: Studies have also shown that FAAH inhibitors URB597 and AA-5HT as well as FAAH substrates such as AEA, PEA, OEA, and 2-arachidonic glycerol can inhibit the invasive and metastatic properties of lung cancer cell line A549 in nude athymic mice, in one case even reducing the development of precancerous lesions in mouse colon [53–58].