维生素D受体基因多态性与铅的肾脏毒性

血铅水平的变化,除了环境等接触因素外,机体的易感性也是铅毒性作用的重要因素,现已发现,在铅负荷、对铅毒性的敏感性等方面均存在着种族差异,提示对铅毒性易感性的不同可能是由于某些遗传因素所致。肾脏在铅代谢、排泄及解毒过程中起着重要的作用,也更易受到损伤。鉴于以上两点,与肾脏有着密切关系的维生素D受体(vitam in D receptor,VDR)基因多态性近年来成为铅毒性作用的研究焦点之一,本文拟就此作一综述。1 VDR与VDR基因多态性1·1 VDR的结构与功能人的VDR是由427个氨基酸组成的酸性蛋白,相对分子质量50 000~60 000,从氨基端到羧…     

儿童维生素D受体基因酶切位点多态性

目的：了解成都地区汉族人群VDR多态性分布情况,为进一步观察其与VDR遗传易感性疾病的相关性打下基础.方法：采用血清学方法,利用限制性内切酶TaqⅠ、ApaⅠ,应用聚合酶链反应（PCR）、限制性片段长度多态性（RFLP）分析、基因测序等技术,测定成都地区正常汉族儿童VDR基因多态性.结果：518名正常汉族儿童中TT、Tt、tt基因型分布频率分别为90.7%、9.1%、0.2%,T、t等位基因频率分别为95.3%、4.7%;AA、Aa、aa基因型分布频率分别为10.8%、36.7%、52.5%,A、a等位基因频率分别为29.2%、70.8%.结论：成都地区汉族儿童VDRTaqⅠ、ApaⅠ酶切位点多态性分布情况,与同属于蒙古人种的其它亚洲国家正常人群的分布频率相似;而与属于高加索人种的分布频率不同.     

维生素D受体基因多态性及维生素D水平与神经发育障碍关系的研究进展

维生素D及其受体在人体不同区域有广泛表达,后者介导活性维生素D的所有分子功能,其基因多态性已被证实与多种发育障碍类疾病易感性相关。现对维生素D受体基因多态性及维生素D水平与神经发育障碍关系的研究进行综述,以期为患儿临床早期预防、干预和治疗提供理论参考。     

维生素D受体基因多态性与食管癌易感性关系

目的探讨维生素D受体基因的多态性与食管癌易感性的关系。方法收集92例食管癌患者及115名对照，用聚合酶链反应-限制性片段长度多态性方法（PCR—RFLR），在维生素D受体基因的3’端分析限制性酶切位点TaqⅠ的多态分布。结果TaqI位点等位基因在2组间分布差异有统计学意义。与TT基因型者相比，Tt、tt基因型者患食管癌的危险性明显下降。结论维生素D受体基因的多态性与食管癌有关，Tt、tt基因型降低食管癌的易感性。     

维生素D受体基因多态性肿瘤易感性研究进展

随着遗传学、分子生物学等领域的不断发展．对肿瘤病因学的研究达到了分子基因水平。基因的多态性是指某一基因位点上存在着两个或两个以上不同的等位基因的现象，是造成个体对肿瘤易感性差异的重要因素。维生素D受体(vitaminiDreceptor，VDR)是介导1，25(OH)2D3发挥生物效应的核内生物大分子，为类固醇激素／甲状腺激素受体超家族的成员。1，25(OH)2D3是维生素D的活性形式，它除了具有经典的钙磷代谢调节作用外，还能调节多种正常或肿瘤组织细胞的生长和分化。本文针对近年来VDR基因多态性与肿瘤易感性的研究进展作一综述。     

上海市人群维生素D受体基因多态性频率分布调查

1 .材料与方法 :(1)标本来源 :选择本院体检或骨质疏松门诊的无亲缘关系的上海地区汉族居民 835人 ,男性 2 81人 ,女性 5 5 4人 ,年龄 4 2～ 93岁。(2 )白细胞ＤＮＡ提取 :取 1ｍｌ新鲜全血 (ＥＤＴＡ抗凝 ) ,加入 3ｍｌ溶血剂 (15 5ｍｍｏｌ ＬＮＨ4 Ｃｌ,10ｍｍｏｌ ＬＫＨＣＯ3,0 .1ｍｍｏｌ ＬＥＤＴＡ) ,10 %ＳＤＳ 10 0 μｌ及 10 μｌ蛋白酶Ｋ (2 0ｍｇ ｍｌ) ,置 5 6℃水浴过夜。随后 ,饱和酚 ,酚∶氯仿 (1∶1)和氯仿各抽提一次 ,最后水相中加入 2倍体积无水乙醇 ,0 .1倍体积 3ｍｏｌ ＬＮａＡｃ ,- 2 0℃ 2 0ｍｉｎ ,离心后 70 %乙…     

维生素D受体基因多态性与儿童相关疾病的研究进展

<正>维生素D是一种固醇类衍生物,依赖维生素D受体(VDR)在人体中发挥广泛的生理功能。VDR能在多种组织和细胞中表达,由VDR基因编码。研究表明VDR与呼吸系统、免疫系统、心血管系统、血液系统、内分泌系统、神经系统及肿瘤等疾病的发生密切相关。VDR基因在人群中存在多态性分布,本文就VDR基因多态性与儿童相关疾病的研究做一综述。     

维生素D及其受体基因多态性与儿童疾病的相关性

人体内的维生素D源于肠道吸收及皮肤合成,属于脂溶性维生素,它不仅参与机体钙磷代谢的调节,还与内分泌、免疫、呼吸等多系统代谢调节相关。而维生素D受体及其基因多态性是维生素D在人体内发挥生物学效应的重要组成部分。本文就近些年来国内外关于血清维生素D水平、维生素D受体基因多态性与儿童呼吸、免疫等系统以及儿童生长发育、代谢等相关疾病的研究进行综述,为维生素D及其受体基因多态性在儿童疾病方面的研究及疾病的预防、治疗起到积极作用。     

我国维吾尔族维生素D受体基因多态性分布的研究

目的研究我国乌鲁木齐维吾尔族妇女维生素D受体(VDR)基因多态性分布,探讨不同地区、不同民族之间基因型频率分布.为从VDR基因水平研究与骨质疏松的关系提供依据.方法采用聚合酶链反应(PCR)限制性片段长度多态性技术,对55例维吾尔族、179例汉族健康妇女进行VDR基因检测.结果维吾尔族55例中bb型40例(72.72%),Bb型12例(21.81%),BB型3例(5.45%),汉族179例,bb型162例(90.50%),Bb型17例(9.50%),未见BB型.结论中国维吾尔族VDR基因多态性分布与中国汉族比较,差异有显著性意义(P＜0.05).     

淄博市汉族育龄女性维生素D受体基因多态性分布

目的 针对淄博市汉族育龄女性开展分子流行病学调查,探讨维生素D受体(VDR)的基因多态性分布,获取淄博市的群体遗传学特征。方法 以2018年7月—2020年1月到淄博市中医医院进行围孕期检查的352名汉族健康女性为研究对象,采集口腔黏膜上皮脱落细胞,抽提基因组DNA,使用荧光定量PCR方法检测VDR Bsm I和Taq I位点基因多态性,进行统计分析。结果 (1)入组对象的基因多态性分布符合遗传平衡。(2)VDR Bsm I位点GG、GA及AA的基因型频率分别为89.2%、10.8%、0%,G、A等位基因频率分别为94.6%、5.4%。VDR Taq I位点TT、TC及CC的基因型频率分别为87.5%、12.5%及0.0%,T、C等位基因频率分别为93.8%、6.3%。(3)VDR Bsm I和Taq I两位点连锁有4种组合,频率从高到低依次是GG/TT(86.6%)、GA/TC(9.94%)、GG/TC(2.56%)及GA/TT(0.85%)。两位点间存在高度连锁不平衡(D’=0.915,r²=0.716)。结论 获取淄博市汉族女性VDR Bsm I、Taq I...     

维生素D受体基因多态性对儿童营养性佝偻病骨代谢的影响

目的探讨维生素D受体（VDR）基因多态性对营养性佝偻病患儿骨代谢影响。方法用聚合酶链反应限制性内切酶Bsm I酶切技术检测了92例营养性佝偻病患儿VDR基因型,同时测定骨代谢指标,并分析两者间的关系。结果 92例营养型佝偻病患儿VDR基因Bsm I多态性频率分别为bb 93.48%,Bb 4.35%,BB 2.17%;bb基因型组患儿血清骨钙素水平明显高于Bb基因组及BB基因型组患儿（P均〈0.05）。3组间血清钙、磷、碱性磷酸酶、降钙素差异均无统计学意义。结论营养性佝偻病Bsm I酶切位点VDR基因多态性与骨钙素有一定关联。     

维生素D受体基因FokI位点多态性与儿童1型糖尿病相关性分析

目的探讨维生素D受体(VDR)基因FokI位点多态性与儿童1型糖尿病(T1DM)的相关性。方法检索PubMed、中国学术期刊全文数据库(CNKI)、中国生物医学文献数据库(CBM)、万方数据库,收集维生素D受体基因FokI位点多态性与儿童T1DM相关性的文献。利用Meta分析的方法分析VDR基因FokI位点的Ff、ff、Ff+ff基因型在儿童T1DM组与对照组中的分布是否有差异。检索时间截至于2011年9月。结果共纳入符合条件的文献6篇,其中T1DM 734例,对照组788例。根据FokI位点的Ff、ff、Ff+ff基因型的异质性检验结果,分别利用随机效应模型、固定效应模型、随机效应模型对VDR基因FokI位点的Ff、ff、Ff+ff基因型与T1DM相关性进行Meta分析,结果提示VDR基因FokI位点的Ff、ff、Ff+ff基因型的合并OR值(95%CI)分别为1.16(0.74～1.82)、1.03(0.75～1.42)、1.03(0.63～1.66)。结论 VDR基因FokI位点的Ff、ff、Ff+ff基因型均与儿童T1DM的发生无关。     

Association between Vitamin D Receptor Polymorphism and Serum Vitamin D Levels in Children with Low-Energy Fractures

Objective: Fractures of bones, especially forearm fractures, are very common in children and their number is increasing. This study was designed to determine the impact of vitamin D serum levels and vitamin D receptor (VDR) polymorphisms on the occurrence of low-energy fractures in children.

Methods: The study group consisted of 100 children with clinically relevant bone fractures and a control group consisted of 127 children without fractures. Total vitamin D [25(OH)D3 plus 25(OH)D2] serum concentrations were evaluated in every patient. Genotypes for 4 restriction fragment length polymorphisms of the vitamin D receptor gene (FokI, ApaI, TaqI, and BsmI) were determined by standard polymerase chain reaction–restriction fragment length polymorphism (PCR-RFLP) techniques.

Results: Differences in concentrations of vitamin D were observed between the group with bone fractures (median = 12 ng/ml) and the control group (median = 16 ng/ml; p = 0.000044).

Higher levels of vitamin D reduced the risk of fracture by 1.06 times (p = 0.0005). No impact of particular VDR polymorphism on the occurrence of low-energy fractures in children was detected. However, there were significant differences in the prevalence of FokI polymorphism genotypes between the fracture and control groups (p = 0.05). Furthermore, the recessive “aa” genotype of ApaI polymorphism and the dominant “TT” genotype of TaqI polymorphism were associated with higher levels of vitamin D (p = 0.005 and p = 0.036, respectively).

Conclusions: Vitamin D deficiency is an independent risk factor for fractures in children. ApaI polymorphism recessive “aa” and TaqI polymorphism dominant “TT” genotypes are associated with higher levels of vitamin D in serum.     

基因多态性与铅中毒关系的研究

就3种多态性基因是否会使某些个体对铅暴露的敏感性增强这一问题进行了讨论。这3种基因包括：δ-氨基酮戊酸脱氢酶（ALAD）基因，维生素D受体（VDR）基因和血色病基因。ALAD基因的多态性与人动物血液、骨骼和体内器官中的蓄积和分布有关。VDR基因能控制血清中的钙三醇含量，从而控制钙的吸收，并反过来影响骨骼中铅的蓄积。血色病基因可引起铁的过量蓄积而致病，也会影响到铅的吸收。     

Role of Vitamin D and Vitamin D Receptor in Oral Lichen Planus: A Systematic Review

BackgroundOral lichen planus (OLP) is known to be a chronic inflammatory disease associated with various other systemic disorders. Studies have shown that vitamin D deficiency can be involved in the pathogenesis of lichen planus. The aim of this study was to investigate the role of vitamin D and vitamin D receptor in OLPMethodsIn this review study, all English and Persian articles were searched by relevant keywords from the Google scholar, PubMed, science direct, Cochrane, Scopus and Sid databases until January 2020.ResultsFrom the 16 articles obtained after reviewing the abstracts, finally 14 appropriate articles were included in this study.ConclusionAccording to the results of the studies, vitamin D deficiency may be associated with an increased risk of OLP lesions.     

我国汉族妇女维生素D 受体基因多态性和骨质疏松关系的研究

旨在探讨维生素D受体 (VDR)基因多态性与骨质疏松的关系 ,采用聚合酶链反应限制性片段长度多态性技术对 162例健康汉族中老年妇女和 17例骨质疏松患者的VDR基因进行分型 ,并计算其基因频率分布。结果 :正常对照组VDR基因bb、Bb、BB基因型分别为 91.36%、8.64%、0 % ;骨质疏松组分别为 82 .35%、17.65%、0 % ,两组各型均无显著性差异。VDR基因多态性具有种族差异性 ,就目前调查例数而言 ,我国汉族人骨质疏松与BB基因型无明显相关性。     

Vitamin D Receptor (VDR) Gene Polymorphism in Patients Diagnosed with Colorectal Cancer

Colorectal cancer (CRC) is one of the most commonly occurring neoplasias in humans. The prevalence of CRC rates is still rising. Although the exact background of the disease still remains unknown, it is believed that CRC may not only be a result of environmental factors, but also genetic ones. One of the mechanisms underlying CRC might be the vitamin D pathway, as CRC is the most closely linked neoplasia to vitamin D deficiency. This study shows a possible association of the vitamin D receptor (VDR) polymorphisms FokI, BsmI, ApaI, and TaqI with CRC susceptibility. A total of 103 patients diagnosed with CRC (61 men and 42 women, aged 57–82 years) and 109 healthy people (50 men and 59 women, aged 47–68 years) were genotyped using PCR-RFLP for FokI, BsmI, ApaI, and TaqI. None of the single nucleotide polymorphisms (SNPs) individually increased or decreased the risk of CRC. The evaluation of haplotypes revealed two that might enhance the likelihood of CRC development: taB (OR = 30.22; 95% CI 2.81–325.31; p = 0.01) and tAb (OR = 3.84; 95% CI 1.29–11.38; p = 0.01). In conclusion, genotyping is an easy and robust procedure that needs to be performed only once in a lifetime. A creation of a relevant SNP’s panel might contribute to the identification of the groups that are at the greatest risk of CRC.     

维生素D缺乏与女性生殖关系的研究进展

维生素D在体内不止作为维生素，也可以作为激素发挥作用。它是一种可以调节钙磷代谢的固醇类衍生物，在心血管疾病、免疫调节、抗炎、癌症、生殖等各方面都能发挥一定的生物学作用。该生物学作用通常通过可溶性蛋白维生素D受体（VDR）来实现。VDR是一种位于靶细胞核内的转录因子，分布在人类各种系统组织中，包括女性生殖系统。近年有关维生素D与女性生殖系统的关系引起人们关注。维生素D一定程度上影响卵巢生理功能及女性生育力，同时与一些女性生殖系统疾病有关，如多囊卵巢综合征、子痫前期、子宫内膜异位症、妊娠期糖尿病等。现就维生素D缺乏与女性生殖系统关系的相关研究进行综述。     

铅作业工人血铅和氧化应激酶变化的研究

目的研究职业性铅接触者的氧化损伤,探讨血铅和氧化应激酶之间的变化关系,以探讨铅中毒的作用机制。方法采用火焰原子吸收分光光度法测定空气中的铅含量,用石墨炉原子吸收分光光度法测定血铅浓度,选择超氧化物歧化酶（SOD）和丙二醛脱氢酶（MDA）作为氧化应激损伤的效应指标,分析血铅与氧化效应指标的变化。结果共采集了车间内5个工作点的空气样品。接触组血铅浓度（244．274±124．59）μg／L,显著高于对照组（P〈0．01）;接触组SOD活性（61．27±6．97）KU／L,与对照组比较无统计学差异（P〉0．05）;接触组MDA含量（9．42±3．89）mmol／L,显著高于对照组（P〈0．01）;血清MDA含量与血铅之间存在正相关关系（r=0．3,P〈0．01）;吸烟、饮酒对SOD活性和MDA含量影响无统计学差异。结论职业性铅接触引起人体血铅升高,作业场所空气中铅浓度与血铅含量变化不一致,血铅是近期铅接触者的敏感内接触指标,且血铅浓度越高,SOD活性代偿性升高;MDA含量越高,氧化损伤越明显。     

Vitamin D Receptor and Vitamin D Binding Protein Gene Polymorphisms Are Associated with Renal Allograft Outcome

Vitamin D deficiency has adverse effects on renal allograft outcomes, and polymorphisms of genes encoding vitamin D-binding protein (VDBP) and vitamin D receptor (VDR) are defined to play a role in these conditions. The goal of the current investigation was to evaluate the connection between those polymorphisms with acute rejection, viral infection history, and recipients’ vitamin D status. In this study, 115 kidney transplant recipients and 100 healthy individuals were included. VDR polymorphisms including FokI (rs2228570), Apal (rs7975232), BsmI (rs1544410), as well as VDBP (rs7040) polymorphisms were studied using high resolution melting (PCR-HRM) analysis among the studied groups. The frequency of G allele in Apal rs7975232 polymorphism in the kidney transplant recipients was 0.63 times lower than healthy individuals (p = 0.026). Further, the G allele frequency in VDBP rs7040 polymorphism was significantly lower in patients with allograft rejection (p = 0.002). Considering the incidence of viral infection, significant differences were identified between the frequencies of VDR FokI (OR = 2.035; 95% CI 1.06–2.89, p = 0.030) and VDBP rs7040 (OR = 0.40; 95% CI 0.24–0.67, p < 0.001) T alleles in the studied groups. Moreover, the VDBP rs7040 GG genotype distribution was low in the recipients with a history of viral infection (p = 0.004). VDR (FokI) and VDBP (rs7040) alleles and their genotype distribution are significantly associated with allograft outcomes including allograft rejection and viral infection in the studied population.