瘦素受体在肾上腺皮髓质及其肿瘤中的表达及与血浆瘦素的关系  被引量:3

Relationship between plasma level of leptin and the expression of leptin receptor in human adrenal tissues and tumors

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作  者:陈适[1] 曾正陪[1] 李汉忠[2] 童安莉[1] 卢琳[1] 宋爱羚[1] 李明[1] 梁伟[1] 满娜[1] 曹彩霞[1] 

机构地区:[1]中国医学科学院北京协和医学院北京协和医院内分泌科卫生部内分泌重点实验室,100730 [2]中国医学科学院北京协和医学院北京协和医院内分泌科泌尿外科,100730

出  处:《中华医学杂志》2010年第38期2667-2670,共4页National Medical Journal of China

基  金:国家科技十五攻关计划课题(2004BA720A29)

摘  要:目的 观察长型瘦素受体(Ob-Rb)在正常肾上腺皮、髓质及其肿瘤中的mRNA和蛋白表达;并观察原发性醛固酮增多症(PA)、皮质醇分泌瘤(CS)和嗜铬细胞瘤(PHEO)患者的血浆瘦素水平.方法 提取6名健康者肾上腺皮质和髓质和10例CS、14例醛固酮分泌瘤(APA)、20例PHEO患者的组织总RNA和蛋白,用反转录-聚合酶链反应(RT-PCR)和Western印迹法检测不同组织中Ob-Rb mRNA和蛋白表达.ELISA方法测定29例PA、11例CS、15例PHEO患者和20名年龄匹配的血压健康者血浆瘦素水平.结果 在肾上腺皮、髓质及其肿瘤中存在Ob-Rb的mRNA和蛋白表达.在正常肾上腺皮质中,Ob-Rb mRNA(0.32±0.12)和蛋白(1.31±0.26)表达明显均高于其余各组(均P<0.05).Ob-Rb mRNA在APA(0.15±0.10)中的表达明显高于CS(0.05±0.02,P<0.05).APA中Ob-Rb mRNA表达与立位血浆醛固酮水平正相关(r=0.670,P=0.024),而CS患者瘤内Ob-RbmRNA水平与其24 h尿UFC水平正相关(r=0.870,P=0.005).CS患者血浆瘦素水平明显高于非皮质醇瘤患者(P=0.001).结论 肾上腺皮髓质及其肿瘤广泛表达长型瘦素受体,且其表达之间存在差异,瘦素与肾上腺间的关系还需进一步研究.Objective To compare the mRNA, protein expression of long leptin receptor (Ob-Rb)in human adrenal tissues and tumors and observe the plasma level of leptin in primary aldosteronism (PA),cortisol-secreting tumors (CS) and pheochromacytomas (PHEO). Methods Total RNA and protein were extracted from 6 normal human adrenal glands, 10 CS, 20 PHEO; and 14 aldosterone-producing adenomas (APA) (RNA), 10 APA (protein); plasma samples were drawn from 20 controls, 15 PHEO, 29 PA and 11 CS. Results The mRNA and protein of Ob-Rb were widely expressed in human adrenal glands and tumors. The mRNA (0. 32 ±0. 12) and protein (1.31 ±0. 26) expressions of Ob-Rb were higher in normal human adrenal cortex (C) than all other tissues (P 〈0. 05) while the mRNA expression of Ob-Rb in APA (0. 15 ± 0. 10) was higher than CS (0. 05 ± 0. 02) (P 〈 0. 05). The mRNA expression of Ob-Rb in APA was positively correlated with plasma supine aldosterone level (r= 0. 670, P= 0. 024). The mRNA expression of Ob-Rb in CS was positively correlated with 24-hour urinary free cortisol level(r=0. 870, P=0. 005). The plasma level of leptin was higher in CS than in non-CS groups (P= 0. 001). Conclusions Ob-Rb is widely expressed in adrenal tissues and tumors. There is a differential expression in various tissues. Further studies are warranted to understand the relationship between leptin and adrenal gland.

关 键 词:肾上腺肿瘤 瘦素 瘦素受体 

分 类 号:R686[医药卫生—骨科学]

 

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