摘要
目的 探讨类固醇生成因子1（SF-1）和DAX-1在肾上腺皮质肿瘤中的表达及其临床意义.方法 应用实时荧光定量PCR检测39例肾上腺皮质肿瘤：包括对血管紧张素Ⅱ无反应的醛固酮瘤（AⅡ-U-APA）12例、有反应的醛固酮瘤（AⅡ-R-APA）5例、分泌醛固酮的肾上腺皮质癌2例、皮质醇瘤10例、肾上腺无功能瘤10例及8例正常肾上腺皮质的SF-1、DAX-1、ACTH受体和内参β3-actin mRNA的表达.应用Western印迹检测SF-1和DAX-1蛋白在上述组织中的表达,比较不同组织中SF-1、DAX-1mRNA及蛋白表达的差异.对SF-1和DAX-1在肾上腺皮质肿瘤中的表达差异与患者的临床资料行相关性分析.结果 SF-1和DAX-1 mRNA及蛋白在正常肾上腺皮质、AⅡ-U-APA、AⅡ-R-APA、肾上腺皮质醛固酮癌、皮质醇瘤和无功能瘤中的表达存在差异[ SF-1 mRNA相对值：24.58±2.45、23.89±3.17、21.59±3.00、（38.75,44.16）、14.17±2.80和36.38±3.50; DAX-1 mRNA：0.57 ±0.06、0.37±0.05、0.43±0.05、（1.52,1.21）、0.39±0.04和0.83 ±0.08：SF-1蛋白：0.76±0.11、0.76±0.10、0.73±0.07、（1.24,1.40）、0.55±0.04和0.98±0.10：DAX-1蛋白：0.65±0.14、0.39±0.13、0.43±0.14、（1.18,1.02）、0.56±0.04和1.03±0.13;均P＜0.05或P＜0.01];AⅡ-U-APA组织中SF-1正常、DAX-1表达减低、SF-1/DAX-1比值增高且与醛固酮瘤的大小呈明显负相关；SF-1在皮质醇瘤中明显低表达,且与皮质醇瘤大小呈正相关；SF-1和DAX-1 mRNA及蛋白在肾上腺无功能皮质瘤中高表达、在肾上腺醛固酮分泌癌中表达有明显高于其他各组的趋势、而在嗜铬细胞瘤中无表达.结论 SF-1和DAX-1在不同肾上腺皮质肿瘤中表达各异,提示他们可能参与肾上腺皮质肿瘤的生长和激素分泌.
Objective To detect mRNA and protein expression of steroidogenic factor-1 （ SF-1 ） and DAX-1 in human adrenocortical tumors and normal adrenal cortex,and to investigate the effect of SF-1 and DAX-1 on the steroidogenesis and development of adrenocortical tumors.Methods Total RNA and protein was extracted from angiotensin Ⅱ unresponsive aldoterone-producing adenomas （ A Ⅱ -U-APA,n =12 ）,angiotensin Ⅱ responsive aldoterone-producing adenomas （ AⅡ -R-APA,n =5 ）,cortisol-producing adenomas （ CPA,n =10 ）,adrenal nonfunctional adenomas （ NFA,n =10 ）,aldosterone-producing carcinoma （ APC,n =2 ） and normal adrenal cortex （ NAC,n =8）.To analyze gene expression of SF-1,DAX-1,ACTH receptor（ACTHR）,and β-actin by real-time quantitative PCR in different tissues.The protein expression of SF-1,DAX-1,and β-actin in the same tissues by Western blot.To study the relationship of ACTHR,SF-1,and DAX-1 with clinical data in adrenocortical tumors.Results The expression of SF-1,DAX-1 mRNA and protein was different in NAC,AⅡ -U-APA,A Ⅱ -R- APA,APC,CPA,and NFA tissues [ relative expression of SF-1 mRNA：24.58±2.45,23.89±3.17,21.59±3.00,（38.75,44.16）,14.17±2.80,and 36.38±3.50; DAX-1 mRNA：0.57±0.06,0.37±0.05,0.43±0.05,（ 1.52,1.21 ）,0.39 ±0.04,and 0.83 ±0.08 ; SF-1 protein：0.76 ±0.11,0.76 ±0.10,0.73 ±0.07,（1.24,1.40）,0.55±0.04,and0.98±0.10; DAX-1 protein：0.65±0.14,0.39±0.13,0.43±0.14,（1.18,1.02）,0.56±0.04,and 1.03±0.13 ; all P〈0.05 or P〈0.01 ].There was negative correlation by higher SF-1/DAX-1 ratio and tumor size in AⅡ -U-APA tissues.The mRNA and protein expression of SF-1 was lower in CPA and there was the positive correlation with tumor size.Conclusion SF-1 and DAX-1 might play a key role in the development of the adrenocortical tumorigenesis and steroidogenic tissues.
出处
《中华内分泌代谢杂志》
CAS
CSCD
北大核心
2012年第2期103-107,共5页
Chinese Journal of Endocrinology and Metabolism
基金
高等学校博士学科点专项科研基金（20091106110013）
