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.

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.

SULT1E1蛋白表达和性激素含量与子宫肌瘤发病的相关性研究

目的:探讨性激素及人雌激素硫酸基转移酶在子宫肌瘤发生、发展中的作用。方法:化学发光分析法测定30例子宫肌瘤患者和30例同年龄段健康女性血清及组织匀浆中E2、P、T含量。免疫组化染色法检测SULT1E1蛋白的表达。结果:肌瘤组血清E2含量明显低于健康女性组(P<0.05),其T含量则明显高于健康女性组(P<0.05),P含量各组无显著差异;肌瘤组织匀浆中E2含量显著高于肌瘤包膜外肌层组织(P<0.01),其P、T含量两组间无显著差异;肌瘤组织中SULT1E1蛋白表达与肌瘤包膜外肌层组织比较差异显著(P<0.05),肌瘤组织与肌瘤包膜外肌层组织中SULT1E1蛋白定量表达与相应组织匀浆中E2含量分别呈负相关(r=-0.533,r=-0.498,P<0.01)。结论:子宫肌瘤的发生、发展与子宫肌瘤组织局部SULT1E1酶活性降低有关。

SULT1E1、ERβ在子宫内膜腺癌组织中的表达及其相关性

目的:探讨SULT1E1及ERβ蛋白与子宫内膜腺癌的发生、发展之间的关系。方法:采用Western blot方法检测正常增生期子宫内膜组织、不典型增生子宫内膜组织及子宫内膜腺癌组织中SULT1E1和ERβ蛋白的表达含量。结果:SULT1E1和ERβ蛋白在正常增生期子宫内膜组织、不典型增生子宫内膜组织及子宫内膜腺癌组织中的表达含量逐渐降低,三者比较差异有统计学意义(P<0.05)。不典型增生子宫内膜组织及子宫内膜腺癌组织与正常增生期子宫内膜组织比较差异均有统计学意义(P<0.05)。SULT1E1和ERβ蛋白与子宫内膜腺癌组织学分级、肌层浸润深度、手术病理分期及淋巴结转移等无关(P>0.05)。在子宫内膜腺癌组织中,SULT1E1蛋白与ERβ蛋白表达呈明显正相关(r=0.66,P<0.01)。在正常增生期和不典型增生子宫内膜组织中,SULT1E1蛋白与ERβ蛋白表达无明显相关性(r=0.035,P>0.05;r=0.466,P>0.05)。结论:在子宫内膜腺癌的渐近演变过程中,SULT1E1、ERβ表达降低或缺失可能与子宫内膜癌的早期形成有一定的关系,ERβ蛋白含量越多,SULT1E1蛋白对雌激素的调节作用越强,但不能作为子宫内膜腺癌病情严重程度和预后进行评价的指标。

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.

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.

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.

<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.

Gene-viral vectors: a promising way to target tumor cells and express anticancer genes simultaneously

OBJECTIVE: To develop a new kind of vector system called gene-viral vector, which combines the advantages of gene and virus therapies. METHODS: Using recombinant technology, an anti-tumor gene was inserted into the genome of replicative virus specific for tumor cells. The cell killing effect, reporter gene expression of the green fluorescence protein, anti-tumor gene expression of mouse interleukin-12 (mIL-12) and replication of virus were observed by the methods of cell pathology, fluorescence microscopy, ELISA and electron microscopy, respectively. RESULTS: A new kind of gene-viral vector system of adenovirus, in which the E1b-55 kD gene was deleted but the E1a gene was preserved, was constructed. The vector system, like the replicative virus ONYX-015, replicated and proliferated in tumor cells but not in normal ones. Our vector had an advantage over ONYX-015 in that it carried different kinds of anti-tumor genes to enhance its therapeutic effect. The reporter gene expression of the green fluorescence protein in tumor cells was much better than the adenovirus vector employed in conventional gene the rapy, and the expression in our vector system was as low as or even less than that in the conventional adenovirus gene therapy system. Similar results were observed in experiments with this vector system carrying the anti-tumor gene mIL-12. Replication and proliferation of the virus carrying the mIL-12 gene in tumor cells were confirmed by electron microscopy. CONCLUSIONS: Gene-viral vectors are new vectors with an anti-tumor gene inserted into the genome of replicative virus specific for tumor cells. Because of the specific replication and proliferation of the virus in tumor cells, expression of the anti-tumor gene is increased hundreds to thousands of times. This approach takes full advantages of gene therapy and virus therapy to enhance the effect on the tumor. It overcomes the disadvantages of conventional gene therapy, such as low transfer rate, low gene expression, lack of target tropism, and low anti-tumor activity. We believe that this is a promising means for future tumor treatment.

硫酸基转移酶SULT1E1、SULT1A1基因多态性与子宫平滑肌瘤易感性的关联研究

目的:探讨硫酸基转移酶SULT1E1、SULT1A1基因多态性对子宫平滑肌瘤易感性的影响。方法:采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)分析法检测子宫平滑肌瘤组和对照组SULT1E1基因rs3736599位点、SULT1A1基因rs9282861位点的多态性情况。结果:①病例组和对照组SULT1E1 rs3736599位点基因型分布差异有统计学意义(P=0.032),携带突变A等位基因(基因型为A/A和A/G)女性发生子宫平滑肌瘤的风险是野生型纯合子G/G女性的3.497倍(P=0.034,OR=3.497,95%CI:1.12～10.91)。②病例组和对照组SULT1A1 rs9282861位点基因型分布差异无统计学意义。结论:硫酸基转移酶SULT1E1基因rs3736599多态性可能与子宫平滑肌瘤易感性相关,携带突变A等位基因可能是子宫平滑肌瘤的危险因素。

乳腺癌组织SULT1E1蛋白表达与临床病理学特征及预后相关性的研究

目的:探讨乳腺癌组织SULT1E1的表达,并分析其与临床病理学特征及预后因素的相关性。方法:采用免疫组织化学二步法检测129例乳腺癌组织和癌旁正常组织SULT1E1的表达情况,应用Kaplan-Meier法行单因素生存分析SULT1E1的表达与临床病理学特征及预后的关系。结果:乳腺癌组织中SULT1E1的阳性表达率(25.6%)明显低于癌旁组织(45.0%),差异有统计学意义,P<0.05;SULT1E1的表达与乳腺癌患者年龄、肿瘤大小、淋巴结转移和病理类型以及是否有远处转移等无明显相关性,P>0.05。Kaplan-Meier生存分析曲线显示,SULT1E1阳性表达患者的术后无复发生存率较阴性表达患者明显增高,χ2=4.943,P<0.05。结论:乳腺癌组织SULT1E1低表达者提示预后不佳,SULT1E1检测有可能成为判断乳腺癌分期和预后的重要分子标志,并成为重要的预后因素。

Expression of cyclin genes in human gastric cancer and in first degree relatives

OBJECTIVE: To clarify the role of these cyclins in human gastric cancer. METHODS: 38 gastric cancer patients, 29 first degree relatives of gastric cancer patients, as well as 18 healthy subjects were included. The mRNA expression of cyclins D1, D2, D3 and E in gastric biopsies was evaluated by RT-PCR analysis using specific primers. Histomorphological features such as intestinal metaplasia, atrophy, H. pylori infection and severity of gastritis were determined by the updated Sydney System. RESULTS: Significant mRNA overexpression was found for cyclins D2, D3 and E compared with healthy normal specimen, but cyclin D1 expression was not different between tumor and normal tissues. In addition, cyclin D2 and D3 overexpression was significantly more frequent in first degree relatives than in healthy controls (P

SULT1E1基因SNP位点在子宫内膜癌中意义的研究

目的 调查SULT1E1基因rs3736599位点在中国北方汉族健康女性人群及子宫内膜癌患者群体中的频率分布数据,分析SULT1E1基因rs3736599位点多态性与子宫内膜癌发病的相关性。方法 采用PCR-RFLP技术筛选不同分型并将其归类,运用全自动DNA测序技术确定单倍型中的突变位点。结果 SULT1E1基因rs3736599位点基因型分布在病例组和对照组差异有统计学意义,χ~2=9.616,P=0.006,用Fisher确切概率法处理得到确切P值（0.006）仍显示有统计学差异;该位点等位基因分布频率在病例组和对照组差异有统计学意义（χ~2=31.736,P=0.000,OR=2.38,95%CI：1.24~4.56）,携带A等位基因患子宫内膜癌的风险是野生型纯合子的2.38倍。结论 硫酸基转移酶SULT1E1基因的rs3736599位点的多态性可能对子宫内膜癌的发病风险有一定影响,并且A等位基因可能对子宫内膜癌的发生和发展产生重影响。

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。

Exploring the structural and functional effect of pRB by significant nsSNP in the coding region of RB1 gene causing retinoblastoma

In this study,we identified the most deleterious nsSNP in RB1 gene through structural and functional properties of its protein (pRB) and investigated its binding affinity with E2F-2.Out of 956 SNPs,we investigated 12 nsSNPs in coding region in which three of them (SNPids rs3092895,rs3092903 and rs3092905) are commonly found to be damaged by I-Mutant 2.0,SIFT and PolyPhen programs.With this effort,we modeled the mutant pRB proteins based on these deleterious nsSNPs.From a comparison of total energy,stabilizing residues and RMSD of these three mutant proteins with native pRB protein,we identified that the major mutation is from Glutamic acid to Glycine at the residue position of 746 of pRB.Further,we compared the binding efficiency of both native and mutant pRB (E746G) with E2F-2.We found that mutant pRB has less binding affinity with E2F-2 as compared to native type.This is due to sixteen hydrogen bonding and two salt bridges that exist between native type and E2F-2,whereas mutant type makes only thirteen hydrogen bonds and one salt bridge with E2F-2.Based on our investigation,we propose that the SNP with an id rs3092905 could be the most deleterious nsSNP in RB1 gene causing retinoblastoma.

Cloning and analysis of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate reductase genes HsHDR1 and HsHDR2 in Huperzia serrate

We cloned and analyzed the two genes of the 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate reductase(HDR) gene family from Huperzia serrate.The two transcripts coding HDR,named Hs HDR1 and Hs HDR2,were discovered in the transcriptome dataset of H.serrate and were cloned by reverse transcription-polymerase chain reaction(RT-PCR).The physicochemical properties,protein domains,protein secondary structure,and 3D structure of the putative Hs HDR1 and Hs HDR2 proteins were analyzed.The full-length c DNA of the Hs HDR1 gene contained 1431 bp encoding a putative protein with 476 amino acids,whereas the Hs HDR2 gene contained 1428 bp encoding a putative protein of 475 amino acids.These two proteins contained the conserved domain of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate reductase(PF02401),but without the transmembrane region and signal peptide.The most abundant expression of Hs HDR1 and Hs HDR2 was detected in H.serrate roots,followed by the stems and leaves.Our results provide a foundation for exploring the function of Hs HDR1 and Hs HDR2 in terpenoid and sterol biosynthesis in Huperziaceae plants.

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。

Comparison between homologies of E2/NS1 gene from genotype Ⅲ Chinese isolates of hepatitis C virus and that from reported isolates

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内皮系统基因及多态性与高血压的相关性研究进展

高血压是常见的慢性病,是以动脉血压持续升高为特征的心血管综合征,是我国心脑血管病死亡的重要原因。目前高血压已成为一个严峻的公共卫生问题。高血压发病机制复杂多样,随着对发病机制的不断探索,发现遗传因素在高血压的发生发展中起着重要作用。其中内皮系统基因及其动态性在高血压中发挥的作用已逐渐成为研究热点。现就几个内皮系统基因及其多态性与高血压的关系展开论述,以期为临床高血压的诊断和治疗提供新的思路。