Related Experiment Videos
[Expression and significance of integrin alpha5, beta1 and E-CD in patients with non-small cell lung carcinoma]
Qi-Sen Guo1, Hui Jia, Ming-Yong Han
1Department of Internal Medicine II, Shandong Tumor Hospital, Jinan 250117, China. guoqss@163.com
Objective:
To investigate the relationship between the expressions of integrin alpha5 beta1 and E-CD, and clinicopathological characteristics and prognosis of patients with non-small cell lung carcinoma (NSCLC).
Methods:
The expression of integrin alpha5 beta1 and E-CD were analyzed in 53 NSCLC and 12 control specimens by immunohistochemical assay.
Results:
The expression of integrin alpha5 beta1 was significantly higher in NSCLC (58.5%) than that in normal lung tissue (16.7%), and also positively related with pathological characteristics (P = 0.021), lymph node metastasis (P = 0.006), and clinical stage (P = 0.002). The 3-year survival rate in NSCLC group was significantly lower than that in control group (22.3% vs 40.6% , P = 0.041). The positive expression of E-CD in NSCLC and control group was 32.1% and 91.7%, respectively, and negatively correlated with pathological characteristics (P = 0.010) and lymph node metastasis (P = 0.002). The 3-year survival rate in control group was 19.9%, lower than that in NSCLC group (41.2%, P > 0.05), but the difference is not significant.
Conclusion:
The overexpression of integrin alpha5 beta1 may contribute to lymph node metastasis and play an inverse role, while E-CD may be a beneficial prognostic factor in patients with NSCLC.
Related Concept Videos
Intracellular Signaling Affects Focal Adhesions
Some...
Activation of Integrins
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
Integrins
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...