Wnt signalling in colon cancer

ABSTRACT: Hypothesis and proof of concept: Our hypothesis is that increase in cellular iron import proteins (TfR1, DMT1) occur early in the adenoma-carcinoma sequence through mutations in APC and lead to cellular iron loading. As demonstrated in our previous work the effects of this iron loading is to mediate increased Wnt signalling resulting in c-myc induction. This in turn serves to increase the expression of iron import proteins (TfR1, DMT1) and decrease the expression of iron export (ferroportin [FPN]) and storage (ferritin) proteins. Such a hypothesis explains how Wnt signalling controls iron metabolism and ensures that there is adequate cellular iron for ATP generation and cellular proliferation. Experimental design: To test such a hypothesis we aim to prospectively collect the following colorectal tissue from patients attending for colonoscopy: 1. Normal colonic mucosa in patients with no colorectal pathology (n = 30) 2. Polyps and matched normal colon (n = 30) 3. Colorectal cancers and matched normal colon (n = 30) We also intend to collect serum and urine from the following patient groups: 4. Normal colonoscopy (n = 30) 5. Colorectal adenomas (n = 30) 6. Colorectal cancers (n = 30) Primary outcome(s): Measured at baseline, using the expression of proteins in the tissue and serum to detect the cellular and systemic iron transport proteins. The techniques used will include mass spectrometry, western blotting, real time PCR and immunohistochemistry.

DISEASE(S): Colorectal Cancer,Colon

PROVIDER: 2416626 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR