Clinicopathologic significance of BAG1 and TIMP3 expression in colon carcinoma.
OBJECTIVE
To explore the expression of BAG1 and tissue inhibitor of metalloproteinase 3 (TIMP3) in colon carcinoma and their correlation and clinicopathologic significance.


METHODS
SABC immunohistochemistry was used to detect the expression of BAG1 and TIMP3 in 80 colon carcinoma tissues and 20 normal colonic mucosa.


RESULTS
Positive rate of BAG1 in colon carcinoma tissue (80%) was notably higher compared to normal colonic mucosa (10%) (P < 0.05). However, no significant difference was observed in positive rate of TIMP3 in colon carcinoma tissue (43.75%) as compared with normal colonic mucosa (60%) (P > 0.05). Expression of BAG1 and TIMP3 was strongly associated with colon carcinoma differentiation, Duke's staging, lymph node metastasis and survival rate (P < 0.05), but not associated with gender and age. Moreover, BAG1 expression was not correlated with TIMP3.


CONCLUSIONS
Our results suggest that over-expression of BAG1 or attenuated expression of TIMP3 may play an important role in genesis and development of colon carcinoma. The protein expression levels of BAG1 and TIMP3 are related to the malignant degree, infiltration and metastasis of colon carcinoma. BAG1 and TIMP3 might be new biological parameters in predicting invasion and metastasis of colon carcinoma.
Department of Medicine, Affiliated Tumor Hospital of Harbin Medical University, Harbin 150086, Heilongjiang Province, China. bai_yuxian@126.com
Yu-Xian
YX
Bai
Ji-Lin
JL
Yi
Jian-Feng
JF
Li
Hong
H
Sui
D000230:Adenocarcinoma / Q000175:diagnosis / Q000378:metabolism*; D002471:Cell Transformation, Neoplastic / Q000378:metabolism*; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000378:metabolism*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D019717:Tissue Inhibitor of Metalloproteinase-3 / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*
C091732:BCL2-associated athanogene 1 protein; D004268:DNA-Binding Proteins; C088390:TIMP3 protein, human; D019717:Tissue Inhibitor of Metalloproteinase-3; D014157:Transcription Factors