Chemoprevention would be a desirable strategy to avoid duodenectomy in patients with
familial adenomatous polyposis (FAP) suffering from duodenal adenomatosis. We investigated the in vitro effects on cell proliferation, apoptosis, and COX-2 expression of the potential chemopreventives
celecoxib and tauro-
ursodeoxycholic acid (UDCA). HT-29
colon cancer cells and LT97 colorectal micro-
adenoma cells derived from a patient with FAP, were exposed to low dose
celecoxib and UDCA alone or in combination with tauro-
cholic acid (CA) and tauro-
chenodeoxycholic acid (CDCA), mimicking bile of FAP patients treated with UDCA. In HT-29 cells, co-treatment with low dose
celecoxib and UDCA resulted in a decreased cell growth (14-17%, p<0.01). A more pronounced decrease (23-27%, p<0.01) was observed in LT97 cells. Cell growth of HT-29 cells exposed to 'artificial bile' enriched with UDCA, was decreased (p<0.001), either in the absence or presence of
celecoxib. In LT97 cells incubated with 'artificial bile' enriched with UDCA, cell growth was decreased only in the presence of
celecoxib (p<0.05). No clear evidence was found for involvement of
proliferating cell nuclear antigen,
caspase-3, or COX-2 in the cellular processes leading to the observed changes in cell growth. In conclusion, co-treatment with low dose
celecoxib and UDCA has growth inhibitory effects on colorectal
adenoma cells derived from a patient with FAP, and further research on this combination as promising chemopreventive strategy is desired.