LRIG1 expression and colorectal cancer prognosis

Abstract Background Make the right treatment decisions about colorectal cancer (CRC) patients need reliable predictive and prognostic data. However, in many cases this data is not enough. Some studies suggest that LRIG1 gene (leucine-rich repeats and immunoglobulin-like domains1) has prognostic implications in different kinds of cancers. Methods One hundred and two patients with colorectal cancer were retrospectively analyzed for LRIG1 expression at both mRNA and protein levels. SYBR Green Real-Time RT-PCR technique was used for mRNA expression analyses and Glyceraldehyde-3-Phosphate Dehydrogenase gene (GAPDH) was considered as a reference gene for data normalization. LRIG1 protein expression was analyzed using IHC. Additionally, appropriate statistical analyses were used to assess the expression of LRIG1 in test and control groups. The prognostic significance of LRIG1 expression was analyzed using the univariate and multivariate analyses. Results The data revealed the expression of LRIG1 in both mRNA and protein levels was dawn regulated in colorectal tumor tissues (P < 0.01) but is not clinically relevant prognostic indicator in CRC. Conclusions Therefore, it is suggested that LRIG1 expression analyses may not be considered as an important issue when making informed and individualized clinical decisions regarding the management of colorectal cancer patients.