原发性醛固酮增多症肾上腺皮质病变中两种来源的血管内皮生长因子的表达及意义

Expressions and significance of two kinds of vascular endothelial growth factors of different origin in adrenocortical lesions of primary aldosteronism

目的 检测内分泌腺源性血管内皮生长因子（EG-VEGF）和血管内皮生长因子（VEGF）在原发性醛固酮增多症（原醛症）肾上腺皮质病变中的表达及其关系.方法 采用免疫组化和实时荧光定量PCR法检测24例原醛症肾上腺皮质病变和8例正常肾上腺皮质组织EG-VEGF、VEGF的表达,并采集临床资料,分析其表达水平与原醛症临床病理特征之间的关系.结果 醛固酮瘤EG-VEGF、VEGF mRNA和蛋白表达高于原醛症皮质增生及正常肾上腺皮质（均P＜0.05）,后两组差异无统计学意义（P＞0.05）.在原醛症肾上腺皮质病变,EG-VEGF、VEGF的蛋白表达与血浆醛固酮水平相关（P＜0.05）,EG-VEGF与VEGF之间的表达相关（P＜0.01）.结论 EG-VEGF和VEGF对原醛症皮质肿瘤的形成、发展可能起重要作用.

Abstract：Objective To investigate the expression and significance of the endocrine gland-derived vascular endothelial growth factor （EG-VEGF） and vascular endothelial growth factor（VEGF） in adrenocortical lesions of primary aldosteronism. Methods The expressions of EG-VEGF, and VEGF were detected by immunohistochemistry and real-time fluorescence quantitative PCR in samples of 18 cases of adrenocortical adenoma, 6 adrenocortical hyperplasia, and 8 normal adrenal cortex. The correlation between the expressions of EG-VEGF, VEGF, and clinicopathological parameters was analyzed. Results The expression of EG-VEGF or VEGF in adrenocortical adenomas was higher than that in adrenocortical hyperplasia or normal adrenal cortex （ all P〈0. 05 ）, and the expression of EG-VEGF or VEGF between adrenocortical hyperplasia samples and normal adrenal cortex samples was indistinctive. There was no statistically significant correlation between EG-VEGF or VEGF expression and sex, age, blood pressure, serum potassium, plasma renin activity, except in case of serum aldosterone（ P〈0.05 ）. A positive correlation between EG-VEGF and VEGF （ P〈0. 01 ） was found. Conclusions EG-VEGF and VEGF may play a significant role in the formation and development of adrenocortical tumors in primary aldosteronism.