Expression of PI3Kp110α and PI3Kp110β in the colorectal conventional adenoma, serrated lesions and adenoma with canceration and their significance.

AIMS: To evaluate the expression and clinical significance of PI3Kp110α and PI3Kp110β in colorectal conventional adenoma, serrated lesions and adenoma with canceration.

METHODS AND RESULTS: Immunohistochemistry and Western blot analysis were conducted to detect the expression of p110α and p110β in normal colorectal tissues, conventional adenoma, serrated lesions and adenoma canceration. Results revealed that the expression of P110α and P110β in the adenoma canceration was significantly higher than that in normal tissues, tubular adenoma (low grade) and tubular-villous adenoma (low grade) of conventional adenoma, hyperplastic polyps of serrated lesions (P<0.05). But there was no significant difference between the adenoma canceration and the high grade adenoma of conventional adenoma, all grade of villous adenoma and serrated adenoma (P>0.05). The expression of p110α and p110β was correlated with different clinicopathologic factors in conventional adenoma, serrated adenoma and adenoma canceration (P<0.05).

CONCLUSIONS: p110α and p110β were highly expressed in villous adenoma, serrated adenoma and adenoma with canceration. Its high expression may be the risk factor of the progress of adenoma to adenocarcinoma, and may be an important cause of what canceration rate of villous adenoma and serrated adenoma was higher than that of other adenomas. Combined detection of p110α and p110β is helpful to determine the canceration potential of colorectal villous adenoma and serrated adenoma.