[Expressions of nm23, P53 and S100A4 proteins and their relationships with metastasis potential in gastric carcinoma].
OBJECTIVE
To investigate the expression levels of nm23, P53, and S100A4 in gastric carcinoma and their relationships with clinicopathologic parameters and metastasis potential.


METHODS
Pathological specimens from gastric carcinoma,matched para-tumor tissues, metastatic lymph node and distant metastatic tissues were examined for the expression levels of nm23, P53, and S100A4 proteins by tissue microarray technique and immunohistochemistry.


RESULTS
The expression levels of P53 and S100A4 were upregulated (P< 0.01), while the expression of nm23 downregulated (P< 0.05) in gastric carcinoma compared with non-tumor tissues. S100A4 expression was significantly higher in distant metastatic tissues, while nm23 lower in metastatic lymph nodes than those in cancer tissues. Upregulating expression levels of nm23, P53, and S100A4 were significantly correlated with some malignant behaviour of gastric cancer. The expression rates of nm23+/P53+, P53+/S100A4+, and nm23+/S100A4+ immunohistochemical phenotypes were 48/74 (64.9%), 50/74 (67.6%), and 39/74 (52.7%). P53+/S100A4+, nm23+/S100A4+, and nm23+/P53+/S100A4+ phenotypes were associated with high metastasis potential of gastric cancer.


CONCLUSIONS
Alteration of nm23, P53, and S100A4 expression may contribute to the development of gastric carcinoma. Nm23 and S100A4 proteins play a critical role in tumor metastasis. Co-detection of the expression of P53, nm23, and/or S100A4 can be used to evaluate high metastasis potential of gastric cancer.
Department of Oncology, Changzheng Hospital, The Second Military Medical University, Shanghai 200070, China.
Guan-zhen
GZ
Yu
Jie-jun
JJ
Wang
Ying
Y
Chen
Can-rong
CR
Ni
Ming-hua
MH
Zhu
D005260:Female; D015870:Gene Expression; D006801:Humans; D007150:Immunohistochemistry; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D054778:NM23 Nucleoside Diphosphate Kinases / Q000378:metabolism*; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D000071999:S100 Calcium-Binding Protein A4; D009418:S100 Proteins / Q000378:metabolism*; D013274:Stomach Neoplasms / Q000378:metabolism* / Q000473:pathology*; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
D054778:NM23 Nucleoside Diphosphate Kinases; D000071999:S100 Calcium-Binding Protein A4; D009418:S100 Proteins; D016159:Tumor Suppressor Protein p53; C077591:S100A4 protein, human