In the current study we observed that DSS induces NPY expression and up regulation of nNOS.
We observed that DSS had a direct effect on the inner mucus layer and that this allowed bacteria to penetrate this layer before any signs of inflammation could be observed.
Interestingly, prior to AOM-DSS we observed significantly reduced numbers of BrdU+ cells (Figure 4A) with significantly increased numbers of TUNEL+ cells (Figure 4B) per crypt in the proximal and distal colons of TLR2−/− mice compared to WT mice.
However, it was within the p16-positive OPSCC subset that we observed significantly better 2-year DSS and OS with APF-C compared to TPF-C (DSS: 100% vs. 74.6%, P = 0.0019 and OS: 94.1% vs. 74.6%, P = 0.013, respectively).
Thus, the increased sensitivity of IFNAR1−/− mice to DSS may, in effect, be mimicked in the La-IFN-β pretreated mice as a result of decreased receptor expression, which we observed both before and after DSS treatment.
Similarly, during DSS-induced colitis, we observed a much greater expansion of Enterococcus spp. in the lumen and mucosa of Il22ra1−/− mice (∼2 log-fold relative to WT littermates).
Consistent with previous studies in acute inflammatory models, 2 8 we observed that netrin-1-mediated protection during DSS-colitis involves adenosine receptors.
We observed a significant decrease in the body weight of DSS-treated TC-PTP+/− mice compared to DSS-treated TC-PTP+/+ mice (*p<0.001).
In agreement with this, we observed a significant increase in MMP13 gene expression after DSS treatment (Fig 6B).
However, in non-DSS cases in which distal screws only were used, we observed a VT correction loss of after early mobilization in AO type C3 fractures compared with the DSS group.
As expected, we observed that MMP13−/− mice were less sensitive to DSS-induced colitis than MMP13+/+ mice and that this was correlated with reduced bioactive TNF levels.
