Significance of the Expression of Rho-GDP Dissociation Inhibitor β,γ in Lung Squamous Cell Carcinoma and Adenocarcinoma

Objective:To study the expression of Rho-GDP dissociation inhibitor β,γ(Rho-GDIβ,Rho-GDIγ)in lung squamous cell carcinoma and adenocarcinoma and its relationship with the expression of RhoC(Ras homologus oncogenes C)and clinicopathologic parameters.Methods:Western blot assay was employed for Rho-GDIβ,Rho-GDIγ and RhoC in lung squamous cell carcinoma and adenocarcinoma and non-neoplastic lung tissues of 37 cases with fresh specimens.Results:The study showed that Rho-GDIβ,Rho-GDIγ and RhoC were expressed in lung cancer and non-neoplastic lung tissues,the level in lung cancer tissue was much higher than that in non-neoplastic tissues(P<0.001).In lung cancer,the expression of Rho-GDIβ was much higher in patients with lymph node metastasis(P=0.021),and the expression of Rho-GDIγ was much higher in poorly differentiated tumor than in well-differentiated and moderately differentiated tumor,but both of them were not correlated with other clinicopathologic parameters.The expressions of Rho-GDIβ and Rho-GDIγ were not correlated with the expression of RhoC.Conclusion:In lung cancer,Rho-GDIβ and Rho-GDIγ may play a role in the tumorigenesis,Rho-GDIβ may promote metastasis,and Rho-GDIγ may have some relationship with differentiation.