尾加压素ⅡmRNA在正常肾上腺髓质和嗜铬细胞瘤组织中的表达

Expression of urotensin II mRNA in normal adrenal medulla and pheochromocytoma tissues

目的 研究尾加压素Ⅱ (UrotensinⅡ ,UⅡ )mRNA在正常肾上腺髓质和嗜铬细胞瘤组织中的表达。方法 正常肾上腺髓质组织取自 9例意外死亡的中青年 ,嗜铬细胞瘤组织取自 19例患者手术切除标本 ,分别提取组织总RNA ,用逆转录 聚合酶链反应方法进行研究 ,以UⅡ和内参照GAPDH(甘油醛 3 三磷酸脱氢酶 )进行同管扩增 ,以扩增的目的条带灰度和内参照条带灰度比值UⅡ /GAPDH进行UⅡmRNA表达的半定量分析。结果 UⅡ的PCR扩增产物长度为 385bp ,测序结果与GeneBank所登记碱基序列相同率为 99.7%。正常肾上腺髓质和嗜铬细胞瘤组织UⅡ /GAPDH比值分别为 0 .6 9± 0 .2 9和 0 .2 2± 0 .18(P <0 .0 5 )。结论 UⅡmRNA在正常肾上腺髓质和嗜铬细胞瘤组织中均有表达 ,嗜铬细胞瘤组织中的表达低于正常肾上腺髓质组织。

Objective To investigat the expression of human urotensin II(UII)mRNA in normal adrenal medulla and pheochromocytoma tissues. Methods The total RNA of normal adrenal medulla from 9 males who died of accidents and the total RNA of pheochromocytoma tissues resected from 19 patients were extracted. The expression of UII mRNA was studied by reverse transcription-polymerase chain reaction (RT-PCR). UII and its internal control GAPDH were co-amplified in the same tube. Semi-quantitative analysis of the mRNA expression level of UII was carried out based on the ratios of the grey scale of the amplified target band to that of the control band (UII/GAPDH). Results The amplified product of UII is a 385 bp fragment and 99.7% of the bases were the same as the sequence registered in the GenBank. The UII/GAPDH in the normal adrenal medullae and pheochromocytomas were 0.69±0.29 (n=9) and 0.22±0.18 (n=19) respectively (P<0.05). Conclusion Both the normal adrenal medulla and pheochromocytoma express UII mRNA. The expression of UII mRNA is lower in pheochromocytoma than in normal adrenal medulla.