Cdc42 was also found to interact directly with both full-length APC and a truncation mutant APC1 1638, which is implicated in colon cancer.
PGE2 is a metabolite of COX-2 and an important downstream target of PGE2 is the epidermal growth factor receptor (EGFR) pathway that has also been implicated in colon carcinogenesis [30].
Recently, in mice Csnk1a1 or CKIα expression has been implicated in colon cancer invasiveness and cell transformation in the gut [ 3].
The Casein kinase 1 delta (CSNK1D) has been implicated in colon, pancreatic and breast cancer and reduced CSNK1D activity impairs mammary tumorigenesis in vivo [ 49, 50].
Assays targeting CpG islands of LINE-1, MLH1 and MGMT were chosen since aberrant methylation of this retro-transposon and these genes is implicated in colon cancers.
It thus plays an important role in conditions such as Parkinson's disease, eating disorders, psychosis, drug addiction, pain and has also been implicated in colon cancer.
These molecular pathways have been implicated in colon cancer development and progression (Khandwala et al, 2000; Wactawski-Wende et al, 2006).
Lee et al.[ 31] observed hypermethylated genes, including MGMT, in early stages of colorectal adenoma, and MGMT promoter methylation has been implicated in colon cancer progression (in the adenoma-carcinoma sequence) [ 31, 32].
The region also contains several tumor suppressors including BID (a cell death activator that has been implicated in colon cancer), BCL2L13 (an apoptosis facilitator implicated in the progression of leukemia), and AIFM3 (apoptosis-inducing factor associated with mitochondrial function).
In addition, induction of CHOP/GADD153, one of the components of the ER stress-mediated apoptosis pathway, was shown to be implicated in RES-induced apoptosis in colon cancer cells [ 17].
