Colorectal cancer (CRC) is a major public health problem in France and worldwide. CRC is the third most common cancer in incidence and mortality in France. The vast majority of these cancers are adenocarcinomas that arise sporadically and develop from precursor lesions: adenoma. All CCR with the same disease stage do not have the same prognosis. Various parameters have been identified as factors influencing the prognosis and allows adjustment of the treatment. The poor histoprognostic factors are vessels and nerves invasion by the tumor or the mucinous adenocarcinoma subtype. At the molecular level, the presence of microsatellite instability (MSI) improves the prognosis, while the presence of a BRAF mutation is an independent poor prognostic factor. LRP-1 is a multifunctional endocytic receptor that belongs to the family of LDL receptors. It is involved in the clearance of matrix proteases. A loss of expression or a decrease of the LRP-1 activity is correlated with an increase of aggressiveness of cancer cells. This effect was demonstrated in vitro in vesicular thyroid carcinomas after LRP-1 blocking. The decrease in the immunohistochemical expression and LRP-1 genomic in hepatocellular carcinomas and lung adenocarcinomas was correlated with a decrease in the overall survival. In CRC, only one immunohistochemical expression study of LRP-1 in colonic adenocarcinoma has been published to date. This study shows that tumor cells express LRP-1, but in nearly half the cases, weaker than in normal colonic cells. The clinical and prognostic impact of LRP-1 expression in colon cancer and its association with a particular molecular or morphological profile has not been studied to date. In this work, the investigators will study the immunohistochemical and genic expression of LRP-1 in a series of colorectal cancers.
Nov 30,2015
All
18 Years
N/A
18 Years
N/A
100
