[Differential expression of guanylin in colorectal cancer].

To investigate the expression of guanylin in colorectal cancer. The expression of guanylin was examined by RT-PCR and semiquantitative analysis in 20 cases of colorectal cancer, and its relationship with clinical characteristics was analyzed. The positive expression of guanylin in normal tissue (80%, 16/20) was significantly higher than that in tumor tissue (35%, 7/20) (P<0.01). The same result was found in the semiquantitative analysis of 14 cases with differential expression. Differential expression of guanylin in colorectal cancer was associate with TNM stage (P<0.05), not with sex, Borrmann type and degree of differentiation (all P>0.05). There is differential expression of guanylin in colorectal cancer, and this kind of differential expression is associated with tumor TNM stage.