Previous studies found that the WTH3 gene was down regulated in MDR cell lines, and by introducing it back into those lines caused down regulation of MDR1 gene expression that reversed their MDR phenotypes to various anti-cancer drugs [ 9, 15].
Several years ago, while enjoying a delicious "Jimmy Johns" hoagie at a Denver restaurant, Down's assistant remarked, "How could a person possibly improve upon this?" The question caused Down to start thinking.
As demonstrated in Fig. 1, soluble EA1-Fc treatment caused down-regulation of EphA2 and elevation of phosphorylation level of tyrosine, which both indicate activation of EphA2 kinase.
At T51, treatment with ACTH caused down-regulation (P < 0.001) of genes involved in "immune response" (IFNG and IL2) and up-regulation (P < 0.001) of NF-κB1 and TP53.
At T3, treatment with ACTH caused down-regulation of transcripts (P < 0.001) involved in "response to stress" (GADD45A, GADD45B, WRNIP1, and XRCC6) and in "innate immune response" (MAPK3 and NFkBIB).
By administering Compound C to tenocytes in the LG condition, we confirmed that inhibition of AMPK signaling suppressed expression of Egr1 and thus caused down-regulation of those tendon-related genes.
Additionally, TBT caused down-regulation of the thyroid peroxidase and thyroglobulin genes, which correlated with the decrease in T3 and T4, while boosting the thyroid stimulating hormone (TSH) levels.
We further showed that SOD2 expression caused down-regulation of ROS-sensitive AP-1 activity, raising the possibility that the TGFβ signaling was actually modulated by cellular redox status (Bataller et al., 2003; Fleckenstein et al., 2007; Roy et al., 2011).
DSS treatment caused down-regulation of DNA repair genes involved in different DNA repair pathways.
Interestingly, stabilization of β-catenin rapidly caused down-regulation of the expression of Wnt1 itself, suggesting a negative feedback loop.
Consistently, the knockdown of Wnt4a by Wnt4a-MO injection caused down-regulation of both eaf1 and eaf2/u19 (Fig. 1C and 1D, two columns at the left).
