Correlation study of Bcl-2, B7-H1, EGFR, VEGF and colorectal cancer.
OBJECTIVE
To analyze the expressions of Bcl-2, B7-H1, EGFR and VEGF in colorectal cancer for the further investigation of their correlations with the clinical pathological features of colorectal cancer.


METHODS
Fresh colorectal cancer tissues and the expressions of Bcl-2, B7-H1, VEGF and EGFR in paraneoplastic normal mucosal tissues of 57 cases were tested by immunohistochemisty method, and the results were analyzed by SPSS10.0.


RESULTS
1. Compared with paraneoplastic normal tissues, the expressions of Bcl-2 and B7-H1 in colorectal cancer tissues increased significantly with significant difference (P<0.05), while the expression of EGFR and VEGF in colorectal cancer tissues showed no significant difference with those in paraneoplastic normal tissue (P>0.05); 2. The correlation with clinical pathological features: there was significant difference of expression rates of EGFR between different genders (P<0.05); the expressions of BCL-2 and B7-H1 in colorectal cancer of the high- and medium- differentiated groups were significantly higher than those of the low-differentiated group, and the difference was significant (P<0.01); compared with the colorectal cancer patients without lymph node metastasis (Dukes stage A+B), the expression of B7-H1 in patients with lymph node metastasis (Dukes stage C+D) was significantly higher (P<0.05); 3. Within the high- and medium- differentiated colorectal cancer tissues, Bcl-2 expression rate in B7-H1 negative group was higher than the positive group with significant difference (P<0.01).


CONCLUSIONS
In colorectal carcinoma, Bcl-2, B7-H1, EGFR and VEGF were all expressed, independent from age and depth of invasion. However, the expression level of Bcl-2 and B7-H1 correlated with tissue differentiation, and the latter also had correlation with tumor staging. Meanwhile, the short-term follow-up showed that high expression of Bcl-2/B7-H1 existed in death cases. Therefore, the expression detection of Bcl-2, B7-H1 might provide a clear understanding of the biological behavior of colorectal cancer, and was important for the diagnosis, treatment and prognosis judgment of colorectal cancer.
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Xiao-Feng
XF
Li
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Xian-Feng
XF
Liu
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Yong-Yan
YY
Yang
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Ai-Yong
AY
Liu
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Mei-Yun
MY
Zhang
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Xue-Feng
XF
Bai
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Hui
H
Gao
Department of Internal Medicine, Baotou Tumor Hospital No. 18 Tuanjie Street, Qingshan District, Baotou 014030, Neimeng Province, People's Republic of China.
Xiao-Guang
XG
Guo
B7-H1; Bcl-2; colorectal cancer; lymph node metastasis; pathologic staging