2A and 2B) as reported [7] and [12], suggesting specificity of reagent (antibody) and demonstrating a major difference in the levels of BPDE-DNA adducts between exposed and non-exposed animals/tissues. Levels of BPDE-DNA adducts were measured in a similar area of tissue sections (mm2) and
number of cells (∼800 cells/section/animal) in terms of total adduct intensity as well as nuclei containing a percentage of high, medium and low intensity CDK inhibitor due to BPDE-DNA adducts. It was observed that with passage of time, mice on the control diet for 24, 72 and 120 h [subgroups BP(+48h), BP(+96h), BP(+144h)] showed a time-related significant decrease in total adduct(s) intensity (levels) in the liver and lungs compared to BP(+24h) and subgroup of preceding time point (Figure 2 and Figure 3). Interestingly, mice that were shifted to 0.05% curcumin diet and killed at 24, 72 and 120 h [subgroups BP(+48h) + C 24 h, BP(+96h) + C KU-60019 concentration 72 h, BP(+144h) + C 120 h] showed significantly higher decrease in the levels of adducts (intensity) in the liver and lungs compared to BP(+24h) and respective time-matched controls [subgroups BP(+48h), BP(+96h), BP(+144h)] (Figure 2 and Figure 3). This decrease was also evident when a comparison
of percentage intensity of nuclei containing high, medium and low Ribonucleotide reductase levels of adducts was made between curcumin-treated and respective time-matched controls. In the liver, the observed decrease in total adduct intensity in B(a)P [BP(+48h), BP(+96h), BP(+144h)] and B(a)P + curcumin [BP(+48h) + C 24 h, BP(+96h) + C 72 h, BP(+144h) + C 120 h]-treated subgroups
appears to be attributed to the reduction in percentage intensity of nuclei containing high and medium levels of adducts. In the lungs, it was due to decrease in nuclei containing high levels of adducts both in B(a)P [BP(+48h), BP(+96h), BP(+144h)] and B(a)P + curcumin [BP(+48h) + C 24 h, BP(+96h) + C 72 h, BP(+144h) + C 120 h]-treated subgroups (Figs. 2A and 2B). Notably, the percentage intensity of nuclei containing low levels of adducts remained similar in all the subgroups i.e. animals given B(a)P [BP(+24h), BP(+48h), BP(+96h), BP(+144h)] and B(a)P + curcumin [BP(+48h) + C 24 h, BP(+96h) + C 72 h, BP(+144h) + C 120 h]-treated subgroups (Figs. 2A and 2B). Together, results suggest that dietary curcumin led to enhancement of decrease in nuclei containing high and medium levels of adducts in the liver whereas in the lungs a curcumin-mediated enhanced decrease was mainly observed in nuclei containing high levels of adduct(s).