[Relationship between E-CD and Snail expressions and tumor invasion, metastasis and prognosis in colorectal cancer].
OBJECTIVE
To study the E-CD and Snail expressions in colorectal cancer and their relationship with colorectal cancer invasion, metastasis and prognosis.


METHODS
Immunohistochemical staining (EnVision) was used to detect the E-CD and Snail expressions in 30 normal colorectal mucosa, 30 colorectal adenoma and 142 colorectal cancer tissues.


RESULTS
E-CD in the normal colorectal mucosa was strongly positive expressed (90.0%), significantly higher than that in colorectal adenomas (63.3%) and colorectal cancer tissues (41.5%). E-CD expression was significantly related to tumor differentiation, invasion depth, vascular invasion, lymph node metastasis and Dukes' stage (P < 0.05), but not to the patients' age, gender, tumor size and tumor histological type (P > 0.05). The 1-, 3- and 5-year survival rates of the E-CD positive patients with colorectal cancer were significantly higher than that in E-CD negative patients. The positive expression rate of Snail in colorectal cancer tissues (52.1%) was significantly higher than that in normal colorectal mucosa (6.7%) and colorectal adenomas (26.7%, P < 0.05). The snail expression was significantly correlated to tumor histological type, differentiation, invasion depth, vascular invasion, lymph node metastasis and Duke's stage (P < 0.05), but not to patients' age, sex and tumor size (P > 0.05). The 1-, 3- and 5-year survival rates of Snail negative patients with colorectal cancer was significantly higher than that in patients with positive expression (P < 0.05). The expressions of E-CD and Snail in colorectal cancer tissues were inversely correlated (P < 0.05). Cox multivariate analysis showed that E-CD and Snail can be used as independent prognostic indicators (P < 0.05).


CONCLUSIONS
E-CD and Snail expressions in colorectal cancer are related to the tumor invasion, metastasis and prognosis. Low expression of E-CD and high expression of Snail are related to the advanced stage, and poor prognosis in colorectal cancer patients. E-CD and Snail can be used as independent prognostic indicators.
Zheng
Bo-an
BA
Department of Coloproctologic Surgery, Zhejiang Provincial People's Hospital, Hangzhou, China. zhengboan0224@yahoo.com.cn
Deng
Gao-li
GL
Dong
Quan-jin
QJ
Zhao
Zhong-sheng
ZS
Deng
Yong-chuan
YC
D000230:Adenocarcinoma / Q000378:metabolism / Q000473:pathology; D002288:Adenocarcinoma, Mucinous / Q000378:metabolism / Q000473:pathology; D000231:Adenocarcinoma, Papillary / Q000378:metabolism / Q000473:pathology; D000236:Adenoma / Q000378:metabolism; D000293:Adolescent; D000328:Adult; D000368:Aged; D015820:Cadherins / Q000378:metabolism*; D015179:Colorectal Neoplasms / Q000378:metabolism* / Q000473:pathology*; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000378:metabolism / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D011379:Prognosis; D016016:Proportional Hazards Models; D000071250:Snail Family Transcription Factors; D015996:Survival Rate; D014157:Transcription Factors / Q000378:metabolism*; D055815:Young Adult
D015820:Cadherins; D000071250:Snail Family Transcription Factors; D014157:Transcription Factors