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G-protein Coupled Estrogen Receptor Expression in Growth Hormone Secreting and Non-Functioning Adenomas
Experimental and Clinical Endocrinology & Diabetes ( IF 1.6 ) Pub Date : 2020-10-22 , DOI: 10.1055/a-1274-1330
Hande Mefkure Ozkaya 1 , Muge Sayitoglu 2 , Nil Comunoglu 3 , Eda Sun 2 , Fatma Ela Keskin 4 , Duygu Ozata 5 , Rabia Hacer Hocaoglu 5 , Khusan Khodzaev 2 , Sinem Firtina 2 , Necmettin Tanriover 6, 7 , Nurperi Gazioglu 8 , Buge Oz 3 , Pinar Kadioglu 1, 7
Affiliation  

Purpose To evaluate the expression of G-protein coupled estrogen receptor (GPER1), aromatase, estrogen receptor α (ERα), estrogen receptor β (ERβ), pituitary tumor transforming gene (PTTG), and fibroblast growth factor 2 (FGF2) in GH-secreting and non-functioning adenomas (NFA). Methods Thirty patients with acromegaly and 27 patients with NFA were included. Gene expression was determined via quantitative reverse transcription polymerase chain reaction (QRT-PCR). Protein expression was determined via immunohistochemistry. Results There was no difference, in terms of gene expression of aromatase, ERα, PTTG, and FGF2 between the two groups (p>0.05 for all). ERβ gene expression was higher and GPER1 gene expression was lower in GH-secreting adenomas than NFAs (p<0.05 for all). Aromatase and ERβ protein expression was higher in GH-secreting adenomas than NFAs (p=0.01). None of the tumors expressed ERα. GPER1 expression was detected in 62.2% of the GH-secreting adenomas and 45% of NFAs. There was no difference in terms of GPER1, PTTG, FGF2 H scores between the two groups (p>0.05 for all). GPER1 gene expression was positively correlated to ERα, ERβ, PTTG, and FGF2 gene expression (p<0.05 for all). There was a positive correlation between aromatase and GPER1 protein expression (r=0.31; p=0.04). Conclusions GPER1 is expressed at both gene and protein level in a substantial portion of GH-secreting adenomas and NFAs. The finding of a positive correlation between GPER1 and ERα, ERβ, PTTG, and FGF2 gene expression and aromatase and GPER1 protein expression suggests GPER1 along with aromatase and classical ERs might mediate the effects of estrogen through upregulation of PTTG and FGF2.

中文翻译:

G 蛋白偶联雌激素受体在生长激素分泌和无功能腺瘤中的表达

目的评价G蛋白偶联雌激素受体(GPER1)、芳香化酶、雌激素受体α(ERα)、雌激素受体β(ERβ)、垂体瘤转化基因(PTTG)和成纤维细胞生长因子2(FGF2)在GH中的表达。 -分泌和无功能的腺瘤(NFA)。方法 肢端肥大症患者30例,NFA患者27例。通过定量逆转录聚合酶链反应(QRT-PCR)确定基因表达。通过免疫组织化学测定蛋白质表达。结果两组间芳香化酶、ERα、PTTG、FGF2基因表达差异无统计学意义(均p>0.05)。与 NFA 相比,分泌 GH 的腺瘤中 ERβ 基因表达更高,GPER1 基因表达更低(所有 p<0.05)。GH 分泌腺瘤中的芳香酶和 ERβ 蛋白表达高于 NFA(p=0.01)。没有一个肿瘤表达ERα。在 62.2% 的 GH 分泌腺瘤和 45% 的 NFA 中检测到 GPER1 表达。两组GPER1、PTTG、FGF2 H评分无差异(均p>0.05)。GPER1 基因表达与 ERα、ERβ、PTTG 和 FGF2 基因表达呈正相关(p<0.05)。芳香化酶与 GPER1 蛋白表达呈正相关(r=0.31;p=0.04)。结论 GPER1 在大部分 GH 分泌腺瘤和 NFA 中均在基因和蛋白质水平上表达。发现 GPER1 与 ERα、ERβ、PTTG、
更新日期:2020-10-27
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