前列腺癌细胞株LNCaP和IA8中转移相关蛋白的差异表达及意义

目的:从粘附因素及细胞骨架蛋白角度初步探讨前列腺癌细胞骨转移潜能的分子机制。方法:用Western印迹法鉴定转移潜能不同的两个前列腺癌细胞株(LNCaP和IA8)中E钙粘素和波形蛋白的表达差异情况,并初步分析其在前列腺癌转移过程中所发挥的作用。结果:E钙粘素在低转移细胞株LNCaP中高表达、在高转移细胞株IA8中缺失;而波形蛋白在这两种细胞中的表达情况恰与E钙粘素相反。结论:人前列腺癌高、低转移株之间确实存在转移表型(E钙粘素和波形蛋白)的表达差异,而这两种表达差异蛋白可能在促进或抑制前列腺癌转移的过程中发挥重要作用。

Expression and Significance of Metastasis-associated Proteins in Prostate Cancer Cell Lines with Different Metastatic Potentials

Objective: To observe the expression profiles between two metastasis-associated proteins in different prostate cancer cell lines and explore the molecular mechanisms of bone metastatic potentials. Methods: Expressions of E-cadherin and vimentin in two prostate cancer cell lines (LNCaP and IA8) with different metastatic potentials were detected by Western blotting. Results: There was remarkable difference in the expressions of E-cadherin and vimentin between the highly metastatic cell line and the lowly one. As one of the adhesion associated proteins, E-cadherin was detected with high level of expression in LNCaP cell line, which was well known as low metastatic potential. However, E-cadherin did not expressed in IA8 with high metastatic potential. And as one of the cytoskeleton proteins, vimentin expression was high in IA8, but not in LNCaP. Conclusion: There is definitely difference in the metastatic phenotypes (E-cadherin and vimentin) among cell lines with different metastatic potentials. The expressions of E-cadherin and vimentin proteins may play important roles in promoting and inhibiting the metastasis of prostate cancer respectively, and may be considered to be valuable in evaluating the malignant degree, predictable metastasis and prognosis of prostate cancers.