NAAA and colon carcinoma: This appears to be the case in intact human T84 colon carcinoma cells, where the hydrolysis of ≈0.1 μM PEA added to the medium is greatly reduced by URB597 (1 μM), but it is only modestly affected by the NAAA inhibitor pentadecylamine (30 μM) and not affected by the NAAA inhibitor diacylamine (10 μM) [34].