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[Expression of candidate tumor suppressor gene N-Myc downstream-regulated gene 2 in colon cancer]
Da-Ke Chu1, Jian Zhang, Hai Shi
1Department of Gastrointestinal Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China.
Objective:
To analyze the expression level of candidate tumor suppressor gene N-Myc downstream-regulated gene 2 (NDRG2) in human colon cancer.
Methods:
Thirty samples of colon cancer tissues with matched normal colon tissues were collected. The NDRG2 mRNA level was detected by semi-quantitive RT-PCR and the NDRG2 protein level was examined by Western blot and immunohistochemistry.
Results:
Twelve samples of colon cancer tissues had low NDRG2 mRNA level and low protein level. The positive rates of NDRG2 in normal tissues and the tumorous colon tissues were 90.0%(27/30) and 53.3%(16/30) by immunohistochemistry respectively. There was a significant difference between two groups (P<0.05). The NDRG2 expression was not correlated with age, sex, metastasis of lymph node, depth of infiltration, as well as the Dukes staging(P>0.05), while it was correlated to the histology grading. The positive rate of NDRG2 in the well- and moderate-differentiation group was higher than that in the poor-differentiation group(P<0.05).
Conclusion:
The expression of NDRG2 is low in some colon cancer tissues, which indicates that the low level of NDRG2 expression may be engaged in the development of colon cancer.
Insights
The expression of N-Myc downstream-regulated gene 2 (NDRG2) is often low in colon cancer tissues. This reduced NDRG2 expression may play a role in the development of colon cancer.
Area of Science:
- Oncology
- Molecular Biology
- Gene Expression Analysis
Context:
- Colon cancer is a significant global health concern.
- N-Myc downstream-regulated gene 2 (NDRG2) is a candidate tumor suppressor gene.
- Understanding NDRG2's role in colon cancer is crucial for developing new therapeutic strategies.
Purpose:
- To investigate the expression levels of NDRG2 in human colon cancer tissues.
- To correlate NDRG2 expression with clinicopathological features of colon cancer.
Summary:
- NDRG2 mRNA and protein levels were analyzed in 30 pairs of colon cancer and normal tissues using RT-PCR, Western blot, and immunohistochemistry.
- A significant decrease in NDRG2 expression was observed in colon cancer tissues compared to normal tissues (90.0% vs 53.3% positive rate).
- Low NDRG2 expression was associated with poor histology grading but not with other clinicopathological factors.
Impact:
- The findings suggest that reduced NDRG2 expression is implicated in colon cancer development.
- NDRG2 may serve as a potential biomarker for colon cancer prognosis.
- Further research into NDRG2's functional role could lead to novel therapeutic targets.
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