While the majority of the differentially expressed probes in the set1Δ mutant corresponded to increased expression, loss of clr3 resulted in 792 probes changing significantly in comparison with wild-type, with approximately equal numbers corresponding to upregulated and downregulated transcripts.
Changes in regulation of protein expression, loss of function of a cell, or even uncontrollable division can occur if mutations in cellular DNA go uncorrected.
Mutations in PIK3CA and PTEN protein expression loss have also been suggested as biomarkers of anti-EGFR moAbs resistance.
Notably, while tumor cells from Ink4a-deficient mice acquired loss of Arf or p53 expression, loss of p16(Ink4a) was observed in only 3 of 6 MMs from Arf mice.
Recent work identified several genes required for the BRAFV600E-induced senescence and showed that in the context of BRAF mutation, expression loss of one of them, IGFBP7, is critical in promoting the progression to melanoma [23].
However in 8/11 (73%) patients with loss of ABO allelic expression, the ABO promoter was methylated compared with 2/10 (20%) of patients with no ABO allelic expression loss (P = 0.03).
The effect of skin CD44 expression loss on epidermal hyperplasia induced by topically-applied RAL was addressed by comparing the histology of retinoid-treated skin areas of CD44−/− and normal littermates.
PMS2 expression loss was reported in a variety of human.
LCIS is characterized by e-cadherin expression loss [ 16], an EMT hallmark.
However, only one (3.1%) of the 32 adenomas showed Mlh1 expression loss.
PTEN expression loss was found in 18 patients (31.6%, Figure 2a).
