着丝粒蛋白H在肾上腺皮质癌的表达及对肾上腺皮质癌细胞活力和迁移的影响

Expression of centromere protein-H in adrenocortical carcinoma and its impact on viability and migration of adrenocortical carcinoma cells

目的:研究着丝粒蛋白H(CENP-H)在肾上腺皮质癌(ACC)的表达,分析其与疾病进展和预后的关系;探索敲减CENP-H表达对ACC细胞活力和迁移的影响。方法:应用GEPIA2数据库分析CENP-H在76例ACC患者和128例健康对照中的mRNA表达,并分析其在不同肿瘤分期的表达及与预后的相关性;运用UALCAN数据库进一步分析CENP-H在ACC不同肿瘤分期的mRNA表达及与预后的相关性;采用免疫组织化学染色检测CENP-H蛋白在ACC和正常肾上腺石蜡切片的表达。构建敲减CENP-H表达的siRNA(siCENP-H),将人ACC细胞系H295R分为siCENP-H组和siNC组;CCK-8实验检测细胞活力的变化,划痕实验检测细胞迁移能力的变化,Western blot实验检测CENP-H、p-ERK1/2、t-ERK1/2、p-P38、t-P38、p-JNK1/2和t-JNK1/2蛋白水平。结果:CENP-H在ACC中表达较健康对照显著升高,且与肿瘤分期和预后显著相关;CENP-H蛋白在ACC组织中的表达水平显著高于正常肾上腺;敲减CENP-H后,H295R细胞活力和迁移能力较对照组显著降低,p-P38和p-JNK1/2蛋白水平显著降低,以p-JNK1/2的降低尤为显著。结论:CENP-H在ACC中高表达;敲减CENP-H表达能抑制ACC细胞活力和迁移,其机制可能与抑制P38和JNK信号通路的活化有关。

AIM:To investigate the expression of centromere protein-H(CENP-H)in adrenocortical carcinoma(ACC)and its relationship with disease progression and prognosis,and to explore the impact of CENP-H gene knockdown on the viability and migration of ACC cells.METHODS:The mRNA expression level of CENP-H in 76 ACC patients and 128 healthy controls,and its correlations with tumor stages and prognosis were analyzed by GEPIA2 database.The mRNA expression of CENP-H in different stages of ACC and its correlation with disease prognosis were further analyzed by ULCAN database.The protein expression of CENP-H was examined by immunohistochemical staining of paraffinembedded ACC and normal adrenal gland specimens.Knockdown of CENP-H by siRNA(siCENP-H)was performed in human ACC cell line H295R.The viabilty of H295R cells transfected with siCENP-H or siNC was measured by CCK-8 assay,the cell migration was detected by wound-healing assay,and the protein levels of CENP-H,p-ERK1/2,t-ERK1/2,pP38,t-P38,p-JNK1/2 and t-JNK1/2 were detected by Western blot.RESULTS:The mRNA level of CENP-H was significantly higher in ACC than that in normal controls,and was correlated with tumor stages and prognosis.The protein level of CENP-H was significantly higher in ACC specimens than that in normal adrenal gland.Knockdown of CENP-H in H295R cells resulted in decreased cell viability and migration.The protein levels of p-P38 and p-JNK1/2 were decreased in siCENP-H group.CONCLUSION:CENP-H is highly expressed in ACC,and is correlated with tumor stages and poor prognosis.Knockdown of CENP-H can inhibit the viability and migration of ACC cells,and its mechanism may related to inactivation of P38 and JNK signaling pathways.