Pathogenesis of chronic enteropathy associated with the SLCO2A1 gene:Hypotheses and conundrums

Chronic enteropathy associated with the SLCO2A1 gene(CEAS)is a complex gastroenterological condition characterized by multiple ulcers in the small intestine with chronic bleeding and protein loss.This review explores the potential mechanisms underlying the pathogenesis of CEAS,focusing on the role of SLCO2A1-encoded prostaglandin transporter OATP2A1 and its impact on prostaglandin E2(PGE2)levels.Studies have suggested that elevated PGE2 levels contribute to mucosal damage,inflammation,and disruption of the intestinal barrier.The effects of PGE2 on macrophage activation and Maxi-Cl channel functionality,as well as its interaction with nonsteroidal anti-inflammatory drugs play crucial roles in the progression of CEAS.Understanding the balance between its protective and pro-inflammatory effects and the complex interactions within the gastrointestinal tract can shed light on potential therapeutic targets for CEAS and guide the development of novel,targeted therapies.

STING、ZEB1在老年宫颈癌患者中的表达及与HPV感染的相关性

目的探讨干扰素基因刺激因子(STING)、E盒锌指结合蛋白1(ZEB1)在老年宫颈癌(CCA)患者中的表达变化及与人乳头瘤病毒(HPV)感染的相关性。方法选取2021年1月至2022年9月于该院行病理检验的CCA患者62例为CCA组,宫颈上皮内瘤变(CIN)患者65例为CIN组,正常宫颈者63例为对照组,观察记录各组患者宫颈STING、ZEB1阳性表达率及高危HPV感染情况,并分析STING、ZEB1水平与CCA临床病理特征及高危HPV感染情况的相关性。结果CCA组STING、ZEB1阳性表达率高于CIN组及对照组,CIN组ZEB1水平高于对照组,差异均有统计学意义(P<0.05)。CCA组HPV16、18检出率高于CIN组及对照组,CIN组HPV16、18检出率高于对照组,差异均有统计学意义(P<0.05)。CCA患者浸润深度、国际妇产科联盟(FIGO)分期与STING、ZEB1阳性表达率有关(P<0.05),肿瘤分化程度、淋巴结转移与STING阳性表达率有关(P<0.05),CCA患者STING、ZEB1阳性表达率与HPV16、18感染率呈正相关(P<0.05)。结论CCA患者STING、ZEB1阳性表达较高其表达量与FIGO分期、宫颈癌浸润深度、HPV16、18感染有关。STING、ZEB1可能与HPV16、18共同作用于CCA的发生、发展。

不同临床病理特征卵巢浆液性肿瘤患者E-cadherin、BRCA1及P53的表达变化研究

目的:探究不同卵巢浆液性肿瘤中E-钙黏蛋白(E-cadherin)、乳腺癌易感基因1(BRCA1)、P53的表达变化情况。方法:选取2017年12月—2022年2月赣州市妇幼保健院的50例卵巢浆液性癌患者为A组,同时期的40例卵巢交界性浆液性肿瘤患者为B组,30例卵巢良性浆液性囊腺瘤患者为C组。检测及比较三组的组织E-cadherin、BRCA1、P53表达情况,并比较A组中不同年龄、淋巴结转移情况、FIGO分期及不同病理分级者的检测结果。结果:A组的E-cadherin及BRCA1阳性率显著均低于B组及C组,B组则显著均低于C组(P<0.05);A组P53阳性率显著高于B组及C组,B组则显著高于C组(P<0.05)。A组中低级别浆液性癌者E-cadherin和BRCA1阳性率均高于高级别浆液性癌者,低级别浆液性癌者P53阳性率显著低于高级别浆液性癌者,差异均有统计学意义(P<0.05)。A组中不同年龄及FIGO分期者的组织E-cadherin、BRCA1及P53阳性率比较,差异均无统计学意义(P>0.05)。A组有淋巴结转移者E-cadherin和BRCA1阳性率均低于无淋巴结转移者,有淋巴结转移者P53阳性率高于无淋巴结转移者,差异均有统计学意义(P<0.05)。结论:卵巢浆液性癌患者中E-cadherin及BRCA1呈低表达,而P53呈高表达,且不同临床病理情况者存在差异,因此在卵巢浆液性癌的早期筛查检测中有一定的参考价值。

Cytochrome P450 2E1 genetic polymorphism and gastric cancer in Changle,Fujian Province

AIM: Genetic polymorphism in enzymes of carcinogen metabolism has been found to have the influence on the susceptibility to cancer. Cytochrome P450 2E1 (CYP2E1) is considered to play an important role in the metabolic activation of procarcinogens such as N-nitrosoamines and low molecular weight organic compounds. The purpose of this study is to determine whether CYP450 2E1 polymorphisms are associated with risks of gastric cancer. METHODS: We conducted a population based case-control study in Changle county, Fujian Province, a high-risk region of gastric cancer in China. Ninety-one incident gastric cancer patients and ninety-four healthy controls were included in our study. Datas including demographic characteristics, diet intake, and alcohol and tobacco consumption of individuals in our study were completed by a standardized questionnaire.PCR-RFLP revealed three genotypes:heterozygote (C1/C2) and two homozygotes (C1/C1 and C2/C2) in CYP2E1. RESULTS: The frequency of variant genotypes (C1/C2 and C2/C2) in gastric cancer cases and controls was 36.3% and 24.5%, respectively. The rare homozygous C2/C2 genotype was found in 6 individuals in gastric cancer group(6.6%), whereas there was only one in the control group (1.1%). However, there was no statistically significant difference between the two groups (two-tailed Fisher's exact test P=0.066). Individuals in gastric cancer group were more likely to carry genotype C1/C2 (odds ratio, OR=1.50) and C2/C2 (OR=7.34) than individuals in control group (chi(2) =4.597, for trend P=0.032). The frequencies of genotypes with the C2 allele (C1/C2 and C2/C2 genotypes) were compared with those of genotypes without C2 allele (C1/C1 genotype) among individuals in gastric cancer group and control group according to the pattern of gastric cancer risk factors. The results show that individuals who exposed to these gastric cancer risk factors and carry the C2 allele seemed to have a higher risk of developing gastric cancer. CONCLUSION: Polymorphism of CYP2E1 gene may have some effect in the development of gastric cancer in Changle county, Fujian Province.

微小RNA-146a保护脑出血大鼠神经的调控机制

目的探讨微小RNA-146a(miR-146a)靶向调控E盒锌指蛋白1基因(ZEB1)表达及其在脑出血大鼠模型中参与神经保护和抑制细胞自噬的相关分子机制。方法将8周龄雄性SD大鼠40只随机分为4组,分别为假手术组、模型组、miR-146a过表达组和miR-146a低表达组,每组10只。除了假手术组,其他3组采用Ⅶ型胶原酶诱导法建立动脉瘤性自发性脑出血大鼠模型。4组大鼠均基于高盐饮食饲养6周,继续饲养20周后处死。比较4组大鼠的神经功能[改良神经严重程度评分(mNSS)]、脑含水量。采用FJC染色检测退变神经元数量;采用TUNEL染色检测细胞凋亡;采用苏木精-伊红(HE)染色观察脑组织病理变化;采用实时荧光定量聚合酶链反应(qRT-PCR)检测miR-146a和ZEB1 mRNA表达;采用蛋白质印迹(Western blot)检测ZEB1、自噬相关蛋白人重组自噬效应蛋白(Beclin 1)和微管相关蛋白1轻链3(LC3)表达。结果与假手术组比较,模型组的mNSS评分、脑含水量、退变神经元数量和细胞凋亡率增加,miR-146a表达量降低,ZEB1 mRNA以及ZEB1、Beclin 1和LC3蛋白表达升高,差异有统计学意义(P<0.05)。与模型组比较,miR-146a过表达组的mNSS评分、脑含水量、退变神经元数量和细胞凋亡率下降,miR-146a表达量升高,ZEB1 mRNA以及ZEB1、Beclin 1和LC3蛋白表达降低,差异有统计学意义(P<0.05)。与模型组比较,miR-146a低表达组的mNSS评分、脑含水量、退变神经元数量和细胞凋亡率增加,而miR-146a表达量降低,ZEB1 mRNA以及ZEB1、Beclin 1和LC3蛋白表达升高,差异有统计学意义(P<0.05)。结论上调miR-146a可通过靶向抑制ZEB1基因及其蛋白表达,以及调控细胞自噬活性,进而发挥神经保护作用。

Lack of association between cellular repressor of E1A-stimulated genes(GREG)polymorphisms and coronary artery disease in the Han population of North China

Objectives Phenotypic switching of smooth muscle cells(SMCs) plays a critical role in the pathogenesis of atherosclerotic lesions such as coronary artery disease (CAD).Accumulating evidence demonstrates(hat a cellular repressor of E1A-stimulated genes(CREG) plays a role in the maintenance of the mature phenotype of vascular SMCs. The purpose of the present study was to assess the possible association between CREG and CAD in the Han population of North China.Methods The promoter region of CREG by direct sequencing was conducted in 48 subjects.Then SNP rs2995073 and another 4 tagSNPs(rs4657669,rs3767443, rsl6859185,rs3753921) were selected for the association study.All five selected SNPs were determined in 1161 patients with angiographically proven CAD and 960 controls with normal coronary angiograms to investigate the possible involvement of CREG in CAD.Results Genotype frequencies of the five examined polymorphisms were similarly distributed between CAD group and controls(P】0.05).Further haplotype analysis also found no significant differences in the distributions between CAD group and controls(P】0.05). Conclusions This study did not show an association between common variants of CREG and CAD in the northern Chinese Han population.

<i>Escherichia coli</i>Harbouring Resistance Genes, Virulence Genes and Integron 1 Isolated from Athi River in Kenya

Rivers can act as reservoirs of highly resistant strains and facilitate the dissemination of resistance, virulence and integron 1 genes. A cross-sectional study was carried out where 318 water samples were collected (53 from each site) and from the samples, 318 E. coli isolates were analysed for resistance genes, virulence genes and integron 1 using Polymerase Chain Reaction. 22% of the isolates had blaTEM, 33% had blaCTX-M and 28% had blaCMY. Prevalence of typical Enteropathogenic E. coli strains (carrying both eae and bfp genes) was 5% while the prevalence of atypical Enteropathogenic E. coli (carying only eae) was 1.8%. The prevalence of Enteroaggregative E. coli carrying the aggr genes was 11%. The prevalence of Enterotoxigenic E. coli encoding only lt toxin was 16 (5%) and while those carrying only st toxin was 6.9%. The prevalence of Enteroinvasive E. coli strains encoding as IpaH was 5% while that of strains, adherent invasive E. coli, carrying adherent invasive gene inv was 8.7%. 36% isolates were positive for class 1 integrons which were mostly isolated near the sewage effluent from waste treatment plant. Anthropogenic activities and close proximity to sewage treatment plant were found to play a key role in pollution of water body and accumulation of resistance and virulence genes. These results suggest that waste treatment plant may act as reservoir of resistance, virulence and integron 1 genes and is a potential risk to human and animal health in the region.

Role of CYP2E1 gene polymorphisms association with hepatitis risk in Northeast India

AIM:To investigate hepatitis virus, genetic and environmental factors, and their interactions in predisposing patients to liver diseases in Northeast India. METHODS:A total of 104 jaundice patients and 124 community controls were included. Serological analysis was performed by routine enzyme-linked immunosorbent assay, and nucleic acid testing for hepatitis viruses was done by polymerase chain reaction (PCR), followed by PCR direct sequencing for viral genotyping. Cytochrome P450 2E1 (CYP2E1) polymorphism was studied by PCR-restriction fragment length polymorphism. Nitrite and volatile nitrosamines in indigenous foods consumed routinely by the Northeast Indian ethnic population were estimated by Griess’s reagent and GC-MS, respectively.RESULTS: Hepatitis A virus (HAV) infection was predominantly prevalent (36.5%) in our cohort, followed by hepatitis B virus (HBV), hepatitis E virus (HEV) andhepatitis C virus. HBV genotype D and HEV genotype 1 were the most dominant. CYP2E1 c1/c2 genotype frequency was comparatively higher in alcoholic (P<0.0001,OR =30.5) and cryptogenic (P=0.014, OR=8.714) patients, and was associated with significantly higher hepatitis risk (P=0.0.007,OR=6.489). Mutant C allele of Cyp2E1 DraⅠ frequency was comparatively higher in HAV (P=0.006), alcoholic (P =0.003) and cryptogenic (P=0.014) cases, and was associated with overall hepatitis risk (P=0.026, OR=5.083). Indigenous foods, Gundruk, Kharoli, betel leaf and nuts were found to have the highest nitrite content. CONCLUSION: Apart from viral factors, CYP2E1 polymorphism might be associated with increased risk of liver diseases in Northeast India. Indigenous foods that contain nitrite and nitrosamine might be an associated risk factor.

Tissue expression and immunolocalization of cellular repressor of E1A-stimulated gene in postinfarction dysfunctional myocardium

Background Cellular Repressor of E1A-stimu-lated gene(CREG) is widely expressed in adult tissues such as the brain,heart,lung,liver,intestine and kidney in mice.It is not known whether tissue CREG is decreased in the common setting of myocardial infarction which may lead to heart failure.We studied the expression and protein localization of CREG and its main receptor(IFR2R) in a mouse model of myocardial infarction.Methods Male mice were randomized to proximal left anterior descending ligation.The animals were killed on day 1,3,7,14,and 28 after ligation to examine gene expression and protein production of CREG and IGF2R from the infarct,peri-infarct,and contralateral zones of infarcted heart.Results There was decreased CREG mRNA production throughout the myocardium at dav 1,and the expression gradually increased at day 28 after myocardial infarction.The decreased expression of this glycoprotein was not confined strictly to the infarct or peri-infarct zones but also expressed by cardiac myocytes within the myocardium in the contralateral normal zone.Levels of CREG protein in the infarct and peri-infarct zones declined to 1/3- to 1/2-fold of normal levels and declined to 1/2- to 2/3- fold in the contralateral zone.Finally,the expression of the IGF2R mRNA transcripts was downregulated at day 3 and 7 after ligation in the infarct and peri-infarct zones,suggesting that the signal transduction pathways necessary for CREG in the heart remain intact as CREG biosynthesis decreases. Conclusions CREG is constantly present in a model of large myocardial infarction and is decreased at the early stage within the myocardium.The decreased expression of this glycoprotein is not only confined strictly to the infarct or periinfarct zone but also is expressed by cardiac myocytes within the myocardium contralateral to the infarct.Therefore CREG production decreased due to myocardial stress response to injury.

Cloning and Sequence Analysis of Envelope Glycoprotein E1 Gene of Rubella Virus, JR23 Strain

To construct an expression vector containing the E1 glycoprotein gene of rubella virus for the study on the effect of mutation of the E1 gene glycoprotein and the analysis of phylogenetic differences of sequences, the gene encoding the E1 envelope glycoprotein was amplified from rubella virus, Jinan strain JR23, by RT-PCR and ligated into PMD-18T vector. The clones that carried the E1 gene were identified after amp r selection and analysis of restriction enzyme digestion. After sequencing this gene was analyzed by Danstar and Winstar programs, and the map of phylogenetic tree was drawn. The clone of E1 glycoprotein was thus constructed. It was found that the sequence differences between JR23 strain and the TCRB strain from Japan and those between JR23 strain and Thomas strain of England were rather small with difference values of 0.9% and 1.2% respectively. Yet those between JR23 strain and BRD2 strain from Beijing and those between JR23 strain and XG379 strain from Hong Kong were comparatively larger with difference values of 7.6% and 7.3% respectively. The sequence of JR23 strain with other strains was less than 3% except the NC strain (3.7%). It concludes that the construction of E1 glycoprotein gene offers an approach to study the relationship between structures and functions of E1 gene and its gene products. In the phylogenetic tree, it shows that there are significant differences in the sequences of rubella virus isolated in China, and this might be helpful to develop an effective subunit vaccine.

前列腺素E_1抑制血管平滑肌细胞增殖的作用

目的 从细胞周期蛋白和凋亡相关基因探讨前列腺素E1(PGE1)对血管平滑肌细胞 (VSMC)增殖的调控作用。方法 采用培养的新生牛主动脉VSMC ,以胎牛血清及白介素 1(IL 1)分别作为促增殖剂 ,测定不同浓度PGE1对VSMC增殖、细胞内周期蛋白d1mRNA表达、p5 3及Bcl 2基因表达和培养液内NO含量的影响。结果 PGE1浓度依赖性抑制胎牛血清促VSMC增殖作用 ;显著减少细胞周期蛋白d1mRNA含量 ;浓度依赖性诱导IL 1孵育下VSMC产生大量NO ,同时抑制VSMC增殖 ;并促进p5 3基因表达 ,下调bcl 2基因 ,诱导细胞凋亡。结论 PGE1具有抑制VSMC增殖的作用 ,其机制可能与其阻滞VSMC生长有关 ;在炎性因子存在情况下 ,PGE1可诱导VSMC内大量产生NO ,抑制VSMC增殖 ,并加速VSMC凋亡。

胃癌组织中MTA1,PTEN,E-cadherin的表达及其相互关系

目的:观察MTA1,PTEN,E-cadherin蛋白在胃癌和正常胃黏膜组织中的表达,探讨其与胃癌浸润、转移和生物学行为的关系．方法:应用免疫组织化学方法检测54例胃癌手术切除标本和15例正常胃黏膜组织中MTA1,PTEN,E-cadherin的表达．各指标之间相关因素的差异性比较采用x2检验,相关性研究采用Spearman相关分析:结果:与正常胃组织相比,MTA1蛋白在胃癌组织中高表达(46．3％vs6．7％,P<0．01),PTEN和E-cadherin蛋白在胃癌组织中表达下调或缺失(51．9％vs 100％,42．6％vs 100％,均P<0．01)．MTA1和PTEN的阳性表达率与肿瘤浸润深度(P=0．003,P=0．001)、病理分期(P=0．004, P=0．008)、淋巴转移(P=0．000,P=0．001)、远隔转移(P=0．004,P=0．006)、临床分期有关(P=0．001,P=0．000);E-cadherin的正常表达率与肿瘤浸润深度(P=0．027)、病理分化程度(P=0．006)、淋巴转移(P=0．044)、临床分期有关(P=0．000)．Spearman相关分析显MTA1与PTEN蛋白、MTA1与E-cadherin蛋白的表达呈负相关(r=-0．518,r=-0．424,均P<0．05)．PTEN蛋白与E-cadherin蛋白的表达呈正相关(r=0．53,P<0．05)．结论:MTA1蛋白水平高表达和PTEN, E-cadherin蛋白水平低表达可能与胃癌浸润和转移有关,且联合检测可以用于判断胃癌的生物学行为．

猪乙脑病毒分离株BSF．ZZ-1和BSF．ZZ-3在BHK-21细胞上的传代培养及E基因序列稳定性分析

为研究猪乙脑病毒(JEV)分离株遗传基因的稳定性,将JEV分离株BSF.ZZ-1和BSF.ZZ-3在BHK-21细胞上进行连续传代培养,并对其E基因的遗传稳定性进行了研究。结果表明,经连续传代60次后病毒E基因趋于稳定,BSF.ZZ-1毒株E蛋白氨基酸位点E21(A→V)、E200(T→A)、E244(G→E)、E279(M→K)和E426(G→D),以及BSF.ZZ-3毒株的E244(G→E)、E255(F→L)、E285(M→L)、E368(L→S)和E497(N→S)传代后发生稳定点突变。与JEV毒力相关的部分位点如E107、E138、E176、E177和E315遗传稳定性较高,经连续传代后均未发生突变,与疫苗株SA14-14-2相应位点完全一致。但是,另外一些位点的遗传稳定性较差,如BSF.ZZ-3的E279(M→K→M)出现反复突变。这些突变是否与JEV的宿主细胞适应性及毒力变化相关有待进一步研究。

BCSC-1基因异位表达致鼻咽癌细胞CNE-2L2黏附性增强及细胞周期阻滞

目的探讨BCSC-1基因异位表达导致人鼻咽癌细胞CNE-2L2恶性行为减弱的机制。方法采用碘化丙啶染色DNA,流式细胞法检测细胞周期;Hoechest33258染色分析细胞分裂情况;细胞聚集实验检测细胞的黏附性;Western印迹分别检测E-钙黏蛋白、α-catenin和p53的表达。结果细胞周期分析显示异位表达BCSC-1的CNE-2L2细胞、野生型CNE-2L2细胞和转染空载体的CNE-2L2细胞分别有55.1%、43.4%和39.4%处于G0/G1期,分别有25.2%、28.7%和30.9%处于S期,分别有19.7%、27.9%和29.7%处于G2/M期。野生型CNE-2L2细胞和转染空载体的CNE-2L2细胞有较多细胞处于有丝分裂相,异位表达BCSC-1的CNE-2L2细胞几乎见不到有丝分裂相。异位表达BCSC-1的CNE-2L2细胞的黏附性和E-钙黏蛋白、α-catenin及p53的表达水平均高于野生型CNE-2L2细胞和转染空载体的CNE-2L2细胞。结论异位表达BCSC-1的CNE-2L2细胞的黏附性增强可能与E-钙黏蛋白和α-catenin表达增强相关;异位表达BCSC-1的CNE-2L2细胞阻滞于G1期可能与p53表达增加相关。这些变化可能在细胞恶性行为减弱中发挥作用。

Caveolin-1在载脂蛋白E基因敲除小鼠动脉粥样硬化形成中的变化

目的 :探讨caveolin 1在apoE基因敲除小鼠动脉粥样硬化形成过程中的变化。方法 :取正常和apoE基因敲除小鼠 (品系均为C5 7BL 6J)作为研究对象 ,分别观察不同周龄apoE基因敲除小鼠血清甘油三酯、总胆固醇、低密度脂蛋白、高密度脂蛋白的含量及主动脉横断面积、斑块面积的变化。免疫组织化学染色法对caveolin 1进行半定量及定位分析 ,Western blotting检测caveolin 1在主动脉的表达。结果 :apoE基因敲除小鼠的血清甘油三酯、总胆固醇、低密度脂蛋白水平与对照组比较显著升高 ,并随小鼠周龄增加而升高 ;斑块面积及斑块面积与主动脉面积的比值也随小鼠周龄增加而增大。免疫组织化学染色法显示 ,caveolin 1在实验组血管内膜表达呈阳性减弱 ,其程度随周龄增加有减少趋势。免疫印迹检测显示实验组caveolin 1的表达与对照组比较有所减弱 ,并与小鼠周龄呈负相关。结论 :apoE基因敲除小鼠主动脉内皮细胞caveolin 1表达下调 ,可能与其动脉粥样硬化形成有关。

食管癌患者病理组织AEG-1及E-cad表达情况及相关性

目的探究食管癌患者病理组织AEG-1及E-cad表达情况及相关性。方法选取食管癌患者64例,分别取患者食管癌组织和癌旁组织为食管癌组织组(n=64)和癌旁组织组(n=64)。采用免疫组化分析AEG-1及E-cad在2组病理组织中的表达及两者的相关性。结果食管癌组织组AEG-1的阳性表达率显著高于癌旁组织组(P<0.01),E-cad的阳性表达率显著低于癌旁组织组(P<0.01);AEG-1及E-cad在食管癌组织中的表达呈明显负相关性(P<0.01)。癌细胞分化程度、浸润程度和淋巴转移是AEG-1在食管癌组织中阳性表达的影响因素(P<0.01);癌细胞分化程度、浸润程度、临床分期和淋巴转移是E-cad在食管癌组织中阳性表达的影响因素(P<0.01)。结论食管癌组织中AEG-1呈阳性表达,E-cad呈阴性表达,且AEG-1及E-cad在食管癌组织中的表达呈明显负相关性。

肾细胞癌NDRG-1和E-cadherin表达及其与临床病理因素、MVD及预后的关系

目的:研究N-myc下游调节基因(NDRG-1)和上皮型钙粘素(E-cadherin)在肾细胞癌组织中的表达,探讨其与肾细胞癌临床病理因素、微血管密度(MVD)及预后的关系。方法:应用免疫组织化学SP法检测49例肾细胞癌组织及相对应的癌旁肾脏组织中NDRG-1、E-cadherin表达情况。结果:NDRG-1和E-cadherin在正常肾组织表达均高于肾细胞癌组织,差异有显著性(P<0.01);二者随肾细胞癌肿瘤组织学分级、临床分期增高表达减弱,有肾门淋巴结转移者表达低于无淋巴结转移者,E-cadherin表达降低还与肾盂浸润、肾静脉癌栓相关,差异均有显著性(P<0.05);NDRG-1和E-cadherin表达均与肾细胞癌MVD呈负相关性(P<0.05);NDRG-1和E-cadherin表达阴性病例术后存活时间均显著短于阳性病例(P=0.001);肾细胞癌组织中NDRG-1和E-cadherin表达无相关性(r=-0.253,P=0.086)。结论:NDRG-1和E-cadherin表达降低与肾细胞癌的浸润、转移及血管生成和生存时间密切相关,检测NDRG-1和E-cadherin可作为预测肾细胞癌浸润转移及预后有意义的指标。

PEAR1、ApoE基因多态性与AMI患者易感性及临床特征的相关性分析

目的:探讨血小板内皮聚集受体-1(PEAR1)、载脂蛋白E(ApoE)基因多态性与急性心肌梗死(AMI)患者易感性及临床特征的相关性。方法:选取2019年1月—2021年2月心内科收治的AMI患者183例(病例组),选取无AMI病史的中老年志愿者92名(对照组)。采用实时荧光PCR法检测PEAR1和ApoE基因多态性。收集患者性别、年龄、肥胖、吸烟史、高血压、糖尿病、高脂血症、高同型半胱氨酸(Hcy)血症、冠心病家族史等临床资料。比较两组的临床资料以及PEAR1和ApoE基因型的频率分布,分析PEAR1和ApoE基因型分布与性别、年龄、肥胖、吸烟史、高血压、糖尿病、高脂血症、高同型半胱氨酸(Hcy)血症、冠心病家族史的相关性。结果:与对照组相比,病例组肥胖、吸烟史、高血压、糖尿病、高脂血症、高Hcy血症的比例升高(χ^(2)=7.857,P=0.005;χ^(2)=4.787,P=0.029;χ^(2)=34.790,P<0.001;χ^(2)=12.089,P=0.001;χ^(2)=13.355,P<0.001;χ^(2)=11.911,P=0.001)。与对照组相比,病例组GG基因型频率降低,AA基因型频率升高(χ^(2)=13.673,P=0.001)。与对照组相比,病例组G等位基因频率降低,A等位基因频率升高(χ^(2)=13.560,P<0.001)。与对照组相比,病例组ε3/ε3基因型频率降低,ε2/ε2、ε2/ε3、ε3/ε4、ε4/ε4基因型频率升高(χ^(2)=33.003,P<0.001)。与对照组相比,病例组ε3等位基因频率降低,ε2、ε4等位基因频率升高(χ^(2)=36.673,P<0.001)。PEAR1和ApoE基因型与性别、年龄、肥胖、吸烟史、高血压、糖尿病、高Hcy血症、冠心病家族史均无关联(均P>0.05)。ApoE基因型与高脂血症有关联,ε3/ε3基因型患者中高脂血症的比例低于ε2/ε4、ε2/ε2、ε2/ε3、ε3/ε4、ε4/ε4基因型患者(χ^(2)=24.571,P<0.001)。结论:PEAR1、ApoE基因多态性与AMI易感性有一定关联。

RGC-32和ZEB1在胃癌组织中的表达

目的探讨补体反应基因-32(RGC-32)与锌指E盒结合蛋白(ZEB1)在胃癌组织中的表达及意义。方法应用免疫组化S-P法分别检测60例胃癌、,60例癌前病变、20例正常胃黏膜组织中RGC-32和ZEB1蛋白的表达情况。结果 RGC-32在胃癌、癌前病变及正常胃黏膜组织中的阳性表达率依次降低,分别为78.3%、41.7%、40.0%(P<0.05)。ZEB1在胃癌、癌前病变及正常胃黏膜组织中的阳性表达率亦依次降低,分别为88.3%、50.0%、20.0%(P<0.05)。胃癌组织中RGC-32和ZEB1的表达与胃癌的病理分化程度、TNM分期和淋巴结转移有关(P<0.05)。胃癌组织、癌前病变组织中的RGC-32与ZEB1表达均呈正相关关系(r=0.568、0.452,P<0.05)。结论 RGC-32、ZEB1的异常表达可能促进胃癌的发生、发展和浸润转移,两者可能作为胃癌诊断和预后判断的指标,有可能成为胃癌治疗的新靶点。

PPAR-γC161T和CYPⅡE1基因多态性与脂肪肝中医证型的关系

目的探讨PPARγC161-T、CYPⅡE1基因多态性与脂肪肝中医证型的关系。方法将183例脂肪肝患者辨证分为瘀证组、痰证组和无证可辨组,检测183例患者及40例健康者的身体质量指数(BMI)、腰围、血压、肝肾功能、血脂、空腹血糖(FBG)、HOMA–IR(稳态胰岛素抵抗指数),检测其PPARγC161-T、CYPⅡE1的基因多态性及等位基因频率。结果瘀证组和痰证组总甘油三脂(TG)(P<0.01)、总胆固醇(TC)(P<0.05)、低密度脂蛋白(LDL-C)(P<0.05)均高于无证可辨组。PPAR-γC161-T基因型频率及等位基因频率在脂肪肝各证型组与对照组中无统计学差异(P>0.05)。CYPⅡE1基因型频率及等位基因频率在脂肪肝各证型组与对照组中有统计学差异(P<0.05)。结论脂质代谢紊乱及相关改变与脂肪肝痰、瘀证密切相关。CYPⅡE1基因多态性可能在脂肪肝痰瘀证的形成以及转化中起着决定性的作用。