Small leucine-rich proteoglycans expression in colorectal cancer: Differences by primary tumor location.

721Background: SLRP are present in normal and tumor colorectal tissue, with different patterns of expression, being predominant in L CRC. However, due to the small sample the differences observed in survival were no statistically significative. These alterations could be related to interactions at the extracellular matrix level. Further prospective and larger analysis are needed for a better comprehension of tumor microenvironment. Aims: To describe SLRP expression pattern by PTL and survival rate. Methods: 32 tumor specimens and their respective healthy tissue (fresh frozen tissue) from primary tumor surgery from the local biobank: 12 right-sided (R) & 20 left-sided (L) CRC. Transcriptomic approach to analyze SLRP core protein transcriptions using RT-PCR in Those with significative differences were confirmed by immunohistochemistry. Survival analysis was performed using Kaplan-Meier curves and log rank test. Results: Both sides showed BGN 2-fold overexpression (R p = 0.015, L p = 0.001) and OGN decreased...