11
Apr
Tumors fromPpar/-null mice from all treatment groups had a higher level ofIl6mRNA (2 to 20-fold) andTnfmRNA (2 to 3-fold) compared to that of similarly treated wild-type mice (Figs. samples demonstrate that these effects were due to modulation of terminal differentiation, attenuation of inflammatory signaling and induction of apoptosis, through both PPAR/-dependent and PPAR/-impartial mechanisms. Increased levels and activity of PPAR/ by nimesulide was also observed. These studies support the hypothesis that combining ligand activation of PPAR/ with inhibition of COX2 activity increases the efficacy of preventing chemically-induced skin tumorigenesis as compared to either approach alone. Keywords:peroxisome proliferator-activated receptor-/, skin cancer,…