原因不明子宫内膜薄雌激素受体α基因多态性及其表达

旨在探讨原因不明子宫内膜薄雌激素受体α(estrogen receptor alpha,ERα)基因多态性及其与表达的关系。选择120名原因不明子宫内膜薄患者为试验组,120名子宫内膜正常人群作为对照组。应用分子生物学的方法分析ERα基因PvuⅡ,XbaⅠ限制性片段长度多态性。通过逆转录-多聚酶链反应(RT-PCR)和Western印迹法分析ERα表达。结果显示,P基因型频率试验组为47.1%,对照组为30.0%,OR值:2.076。试验组X基因型频率为20.8%,对照组为30.4%,OR值:0.602。Pvu II和Xba I限制性片段长度多态性在两组中均呈多态性分布。试验组ERα的mRNA和蛋白质表达均比对照组降低(P0.05)。由此得出,ERα基因多态性与原因不明子宫内膜薄有关,P等位基因可能是其危险因素,X等位基因可能是其保护因素。ERα在子宫内膜中原因不明子宫内膜薄中的表达低于子宫内膜厚度正常子宫内膜。     

原因不明月经过少子宫内膜雌激素受体β基因多态性及其表达

目的:探讨原因不明月经过少子宫内膜雌激素受体β(ERβ)基因多态性及其与表达的关系。方法:从2组人群中分别选取原因不明月经过少子宫内膜组织40例、月经量正常子宫内膜组织40例,通过逆转录-多聚酶链反应(RT-PCR)和Western印迹检测ERβ的表达;分析实验组与对照组ERβmRNA及蛋白质的表达情况,将ERβ基因的各基因型、等位基因型与子宫内膜ERβmRNA及蛋白质的表达之间分别进行比较。结果:实验组ERβmRNA表达量为0.6457±0.2957,对照组为0.9637±0.3621,实验组比对照组表达下调,差异有统计学意义(t=-6.589,P0.001);实验组ERβ蛋白质表达量为347.37±30.35,对照组为445.21±45.67,实验组比对照组表达下调,差异有统计学意义(t=-4.353,P0.001);2组RsaⅠ基因型、AluⅠ基因型、CA重复序列基因型ERβ表达差异均无统计学意义。结论:原因不明月经过少患者ERβmRNA及蛋白质在子宫内膜中的表达低于月经量正常子宫内膜,可能与月经量减少有关;2组人群ERβ基因RsaⅠ、AluⅠ、CA重复序列基因型及等位基因型子宫内膜表达无差异。     

原因不明子宫内膜薄雌激素受体β基因RsaⅠ、AluⅠ多态性

旨在探讨重庆地区雌激素受体β基因RsaⅠ、AluⅠ多态性与原因不明子宫内膜薄的关系.选择重庆地区120名原因不明子宫内膜薄患者为试验组,120名正常子宫内膜作为对照组.应用聚合酶链反应-限制性片段长度多态性的方法分析ERβ基因RsaⅠ、AluⅠ多态性.观察ER β基因多态性在试验组与对照组中的分布,分析各基因型、等位基因型及单倍体型特征.结果显示,两组ER β基因RsaⅠ基因型比较差异有显著性,R等位基因型频率试验组为37.1%,对照组为48.3%,OR值为0.630(95%CI=0.438～0.907),P=0.013;两组ER β基因AluⅠ基因型比较差异没有显著性.试验组和对照组ER β基因RsaI和AluI单倍体型D′分别=0.1138、0.0680,其连锁不平衡性不强.ER β基因多态性与原因不明子宫内膜薄有关,R等位基因可能是其保护因素.     

原因不明月经过少子宫内膜雌激素受体β表达

探讨原因不明月经过少子宫内膜雌激素受体β（estrogen receptorβ,ERβ）表达。从两组人群中分别选取原因不明月经过少子宫内膜组织40例,月经量正常子宫内膜组织40例。通过逆转录-多聚酶链反应（RT-PCR）和Western印迹法检测ERβ表达。分析实验组与对照组ERβ-mRNA及蛋白质的表达情况,将不同年龄、人流次数子宫内膜ERβ-mRNA及蛋白质的表达进行比较。实验组ERβ-mRNA表达量为0.6457±0.2957,对照组为0.9637±0.3621,实验组ERβ-mRNA比对照组表达下调,差异有统计学意义（t=-6.589,P〈0.001）。实验组ERβ蛋白质表达量为347.37±30.35,对照组为445.21±45.67,实验组ERβ蛋白质比对照组表达下调,差异有统计学意义（t=-4.353,P〈0.001）。两组人群不同年龄、人流次数ERβ表达比较,差别无统计学意义。原因不明月经过少患者ERβmRNA及蛋白质在子宫内膜中的表达低于月经量正常子宫内膜,其可能与月经量减少有关。原因不明月经过少患者子宫内膜ERβ的表达与年龄、人流次数无关。     

自然发情与诱导发情小鼠子宫内膜中雌激素受体α表达的比较

目的从雌激素受体α(ERα)的角度探讨自然发情小鼠与诱导发情小鼠的子宫内膜上,雌激素受体α表达是否受内源雌激素的特异诱导而变化,两者之间是否存在差异。方法27只同日龄母鼠,根据处理方式的不同随机分为3个组:自然发情假孕组(对照组)、诱导发情处理假孕组和自然发情假孕第1天摘除卵巢组,3个组的小鼠在见栓后第4、6、8天分别取样后,采用免疫组织化学法观察小鼠子宫内膜中雌激素受体α的表达情况。结果免疫组化结果显示,3个处理组的小鼠子宫内膜上皮细胞核、胞质都有ERα存在,且主要表达在腺上皮;见栓第4、6、8天时,诱导发情处理组小鼠子宫内膜的ERα阳性率均显著高于自然发情组和自然发情第1天摘除卵巢组(P0.05);见栓第8天时,自然发情处理组小鼠子宫内膜中的ERα阳性率与自然发情第1天摘除卵巢组差异不显著(P0.05),但见栓第4、6天时两者阳性率差异显著,自然发情处理组小鼠子宫内膜中的ERα阳性率显著高于自然发情第1天摘除卵巢组(P0.05)。结论诱导发情处理的小鼠子宫内膜,其表面雌激素受体α表达显著高于自然发情小鼠,且两者都受其内源性雌激素的特异诱导而变化。     

雌激素受体α在小鼠海马中的表达研究

雌激素在生殖系统、认知记忆系统、骨骼和神经的发育及其功能维持等多种生理功能中扮演了重要的作用。雌激素可以通过结合到核雌激素受体Erα、Erβ来完成其生理功能。最近通过ER敲除鼠和选择性的抑制剂研究表明Erα在海马中具有重要作用。Erα在海马中的表达是否具有年龄和性别差异的研究较少,该文研究了Erα在不同年龄、不同性别的小鼠海马中的表达,并进一步比较了Erα在卵巢去除小鼠和对照小鼠中的表达差异。研究结果揭示了Erα在海马中的表达具有年龄和性别差异,暗示了Erα的表达受到外周雌激素水平的调控。这些结果为进一步研究雌激素和Erα在海马组织中基因表达的调控过程以及相关疾病的临床治疗提供参考。     

雌激素β受体的基因多态性可能与帕金森病的发病年龄有关

雌激素通过拮抗细胞凋亡、氧化应激和神经营养等方式对中脑多巴胺能神经元产生影响 ,从而能预防或延迟帕金森病 (PD)的发生、缓解PD的症状 ,其机制至今尚不清楚。研究发现 ,黑质纹状体的多巴胺能神经元主要表达雌激素 β受体 (ER β) ,而雌激素α受体的表达很低甚至缺如 ,提示E     

雌激素受体基因多态性与乳腺癌易感性研究进展

雌激素受体(ER)是雌激素发挥作用的关键,雌激素受体基因存在遗传多态性,目前已对雌激素受体基因多态性与乳腺癌易感性进行了多项研究.本文就雌激素受体基因的多态性及其与乳腺癌发生的关系进行了综述.     

二恶英对雌激素受体的干扰作用

核受体相关的肿瘤,如乳腺癌和前列腺癌的发生、发展主要依赖于性激素的分泌。环境内分泌干扰物如Ⅲ二恶英,可作为雌激素受体的诱导配体,直接或间接地与转录因子相互作用,从而干扰基因的转录。此外,二恶英还能使雌激素受体发生泛素化修饰,促进它的降解,并使雌激素依赖性的基因转录受到抑制,成为内分泌干扰因子。本文综述了二恶英的类雌激素效应、致癌性以及激素信号干扰的最新研究进展。     

多巴胺D4受体基因启动子区多态性与精神分裂症的相关性

目的:探讨多巴胺D4受体(Dopaminc D4 receptor,DRD4)基因启动子区的3个功能多态性与精神分裂症是否存在相关性.方法:严格按照诊断标准,选取无亲缘关系的精神分裂症患者220例,健康对照组200例提取基因组DNA,采用聚合酶链反应及等位基因特异性扩增技术检测DRD4基因启动子区-521C/T、-616C/G和-1240L/S 3个功能位点的基因型,采用HaploView4.0及SPSS11.5软件分析各位点基因型、等位基因频率及组间差异.结果:DRD4基因-1240L/S的基因型及等位基因频率分布在精神分裂症与正常对照组存在显著性差异(p<0.05).DRIM基因启动子区-521C/T和-616C/G位点的基因型及等位基因频率分布在精神分裂症组与正常对照组无统计学差异(p>0.05).结论:DRD4基因-1240L/S多态性与精神分裂症相关联,携带有-1240L/S多态性住点L等住基因的个体可能更容易患精神分裂症.     

Estrogen Receptor 1 Gene Expression and Its Combination with Estrogen Receptor 2 or Aromatase Expression Predicts Survival in Non-Small Cell Lung Cancer

The biological roles of estrogen receptor 1 (ERS1), estrogen receptor 2 (ERS2), and aromatase (CYP19A1) genes in the development of non-small cell lung cancer (NSCLC) is unclear, as is the use of their expression as a prognostic factor. The aim of this study was to investigate the prognostic value of estrogen receptors and aromatase mRNA expression, along with aromatase protein concentration, in resected NSCLC patients. Tumor and non-tumor lung tissue samples were analyzed for the mRNA expression of ERS1, ERS2 and CYP19A1 by RT-PCR. Aromatase concentration was measured with an ELISA. A total of 96 patients were included. ERS1 expression was significantly higher in non-tumor tissue than in tumor samples. Two gene expression categories were created for each gene (and protein): high and low. ERS1 high category showed increased overall survival (OS) when compared to the low expression category. Aromatase protein concentration was significantly higher in tumor samples. Higher ERS1 expression in tumor tissues was related to longer overall survival. The analysis of gene expression combinations provides evidence for longer OS when both ERS1 and ERS2 are highly expressed. ESR1, alone or in combination with ERS2 or CYP19A1, is the most determining prognostic factor within the analyzed 3 genes. It seems that ERS1 can play a role in NSCLC prognosis, alone or in combination with other genes such as ERS2 or Cyp19a1. ERS2 in combination with aromatase concentration could have a similar function.     

Quantitative Immunohistochemical Analysis Reveals Association between Sodium Iodide Symporter and Estrogen Receptor Expression in Breast Cancer

Background

Human sodium iodide symporter (hNIS) gene over-expression is under active consideration worldwide as an alternative target molecule for breast cancer (BC) diagnosis and targeted radio-iodine treatment. However, the field demands better stratified analysis of endogenous hNIS expression across major BC subtypes. Therefore, we have analyzed subtype-specific variation of hNIS overexpression in breast tumor tissue samples by immunohistochemistry (IHC) and also report the development of a homogeneous, quantitative analysis method of digital IHC images.

Methods

hNIS expression was analyzed from 108 BC tissue samples by IHC. Sub-cellular localization of hNIS protein was analyzed by dual immunofluorescence (IF) staining method using hNIS and HER2 antibodies. An ImageJ based two-step digital analysis method was developed and applied for the bias-free analysis of the images.

Results

Staining of the tumor samples show 70% cases are hNIS positive indicating high incidence of hNIS positive cases in BC. More importantly, a subtype specific analysis done for the first time shows that hNIS expression is overly dominated in estrogen receptor (ER) positive cases than the receptor negative cases. Further, 56% of the ER+ve, PgR+ve, HER2-ve and 36% of ER+ve, PgR+ve, HER2+ve cases show highest intensity staining equivalent to the thyroid tissue. A significant positive correlation is also observed between hNIS and estrogen receptor expression (p = 0.0033, CI = 95%) suggesting hNIS mediated targeted radio-iodine therapy procedures may benefit both ER+ve, PgR+ve, HER2–ve as well as HER2+ve cases. Further, in a few cases, hNIS and HER2 protein localization is demonstrated by overlapping membrane co-expression. ImageJ based image analysis method shows over 70% match with manual pathological scoring method.

Conclusion

The study indicates a positive link between hNIS and ER expression in BC. The quantitative IHC image analysis method reported here will further help in patient stratification and potentially benefit global clinical assessment where hNIS mediated targeted ¹³¹I radio-ablative therapy is aimed.     

雌激素受体a基因多态性与原发性肝癌的相关性研究

目的探讨西南地区雌激素受体a(estrogen receptor a,ERa)基因多态性与原发性肝癌关系.方法选择西南地区100名原发性肝癌患者为实验组,100名非肝病人群作为正常对照组.应用分子生物学的方法分析ERa基因1号内含子内切酶PvuⅡ,XbaⅠ限制性片段长度多态性(restriction fragment length polymorph-ism,RFLP),观察ERa基因多态性基因型在实验组与对照组中的基因型分布.RFLP用PP、Pp、pp(PvuⅡ)和XX、Xx、xx(XbaⅠ)来表示.结果 P基因型频率实验组为32%,对照组为49%,OR值:0.490.X基因型频率实验组为33.5%,对照组为20.5%,OR值:1.954;PvuⅡ和XbaⅠ限制性片段长度多态性在两组中均呈多态性分布.结论 ERa基因多态性与原发性肝癌有关,P等位基因可能是其保护因素;X等位基因可能是其危险因素.     

Eight Functional Polymorphisms in the Estrogen Receptor 1 Gene and Endometrial Cancer Risk: A Meta-Analysis

Background and Objective

Emerging evidence indicates that common functional polymorphisms in the estrogen receptor 1 (ESR1) gene may have an impact on an individual’s susceptibility to endometrial cancer, but individually published results are inconclusive. The aim of this meta-analysis is to derive a more precise estimation of the associations between eight polymorphisms in the ESR1 gene and endometrial cancer risk.

Methods

A literature search of PubMed, Embase, Web of Science and China Biology Medicine (CBM) databases was conducted on publications published before November 1^st, 2012. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated. Statistical analyses were performed using the STATA 12.0 software.

Results

Thirteen case-control studies were included with a total of 7,649 endometrial cancer cases and 16,855 healthy controls. When all the eligible studies were pooled into the meta-analysis, the results indicated that PvuII (C>T) polymorphism was associated with an increased risk of endometrial cancer, especially among Caucasian populations. There were also significant associations between rs3020314 (C>T) polymorphism and an increased risk of endometrial cancer. Furthermore, rs2234670 (S/L) polymorphism may decrease the risk of endometrial cancer. However, no statistically significant associations were found in XbaI (A>G), Codon 325 (C>G), Codon 243 (C>T), VNTR (S/L) and rs2046210 (G>A) polymorphisms.

Conclusion

The current meta-analysis suggests that PvuII (C>T) and rs3020314 (C>T) polymorphisms may be risk factors for endometrial cancer, especially among Caucasian populations.     

多巴胺D4受体基因启动子区功能多态性与海洛因依赖的相关性研究

目的:探讨多巴胺D4受体(DRD4)基因启动子区的3个功能多态性位点与海洛因依赖的相关性.方法:严格按照诊断标准,选取无亲缘关系的海洛因依赖患者212例及健康对照组200例提取基因组DNA,采用聚合酶链反应及等位基因特异性扩增技术检测DRD4基因启动子区-521C/T、-616C/G、及-1240L/S 3个功能多态性位点的基因型,采用HaploView及SPSS11.5软件分析各位点基因型、等位基因频率及组间差异.结果:DRD4基因-521C/T的基因型及等位基因频率分布在海洛因依赖组与正常对照组存在显著性差异(p＜0.05).结论:多巴胺D4受体(DRD4)基因-521C/T多态性与海洛因依赖相关联,T等位基因可能是海洛因依赖的风险因子.     

Association of Dental Fluorosis with Polymorphisms of Estrogen Receptor Gene in Chinese Children

Dental fluorosis (DF) is one of the important performances of endemic fluorosis. Some studies indicated that estrogen receptor (ESR) gene polymorphisms were associated with bone metabolism-related diseases. Therefore, it is possible that the variation in ESR genotypes will be associated with DF status. A case?Ccontrol study was conducted among children aged 8?C12 years with (n?=?75) or without (n?=?165) DF in China to investigate the relationship between ESR gene polymorphisms and DF. Gene polymorphisms were genotyped using the PCR-RFLP procedure. Children carrying R allele of ER RsaI had significantly increased risk of DF (Odds ratio (OR)?=?1.821; 95% confidence interval (CI), 1.013?C3.274) compared to children carrying r allele of ER RsaI in endemic fluorosis villages. For children with high-loaded fluoride status, carrying X allele of ESR?? XbaI had a significantly decreased risk of DF (OR?=?0.542; 95% CI, 0.314?C0.936) compared to carrying x allele. This study provides the first evidence of an association between polymorphisms in the ESR gene with DF in high-fluoride-exposed populations. Further studies are needed to confirm the association.     

多巴胺D2受体基因TaqIB多态性与酒依赖的关系

目的:探讨汉族人群中多巴胺D2受体(DRD2)基因TaqIB多态性与酒依赖的相关性.方法:采用聚合酶链式反应-限制性片断长度多态性(PCR-RFLP)技术,检测酒依赖组(80例)和对照组(95例)的DRD2基因TaqIB多态性的基因型和等位基因频率.结果:酒依赖组和时照组的DRD2基因TaqIB多态性的基因型和等位基因频率有显著性差异,等位基因B2的携带者显著降低其嗜酒的发生率(OR:1.636,P＜0.05).结论:本研究提示,在汉族人群中DRD2基因TaqIB多态性与酒依赖存在相关性,TaqIB2等位基因可能是降低酒依赖发病的影响因子.     

Association between BMP15 Gene Polymorphism and Reproduction Traits and Its Tissues Expression Characteristics in Chicken

BMP15 (Bone morphogenetic protein 15) is an oocyte-secreted growth factor required for ovarian follicle development and ovulation in mammals, but its effects on reproduction in chickens are unclear. In this study, the association between BMP15 polymorphisms and reproduction traits were analyzed, and its expression characteristics in different tissues were explored in LaiWu Black chickens. Three single nucleotide polymorphisms (SNPs) were identified in four hundred LaiWu Black chickens. One SNP (NC_006091.3:g.1773T>C) located in exon 2 which was significantly associated with egg weight at first egg (EWFE) (P = 0.0389), was novel. Diplotypes based on the three SNPs were found to be significantly associated with egg weight at age of 43W (EW43) (P = 0.0058). The chickens with H3H3 diplotype had their first egg 0.57 days later than chickens with H5H5 diplotype and 1.21 days-3.96 days earlier than the other five diplotype chickens. The egg production at age of 43W (E43), egg production at age of 46W (E46) and egg production at age of 48W (E48) for chickens with H3H3 diplotype were the highest among all the chickens, and the E48 of chickens with H3H3 diplotype had 11.83 eggs higher than chickens with H1H5 diplotype. RT-qPCR results showed that the expression level of BMP15 gene in ovarian follicle was in the order of 4 mm>6 mm -8 mm> 15 mm -19 mm> 23 mm -29 mm > 33 mm -34 mm in diameter. The mRNA level in follicles of 4 mm and 6–8 mm in diameter were significantly higher than that in the other follicles (P<0.01). In the same week, the highest mRNA level was found in the ovary, and it was significantly different from that found in the liver and oviduct (P<0.01). Our results indicate that BMP15 plays a vital role in the development of ovary and follicles, especially in the development of primary follicles. H3H3 may be an potential advantageous molecular marker for improving reproduction traits in chickens.