ZNF278 siRNA抑制胃癌细胞株AGS增殖的实验研究

背景：ZNF278属C2H2型锌指蛋白,为参与生长发育的重要转录因子,其异常表达可能参与肿瘤发生。目的：研究ZNF278siRNA对胃癌细胞株AGS增殖和周期的影响。方法：以蛋白质印迹法检测正常胃上皮细胞株GES-1和胃癌细胞株AGS中ZNF278表达。构建ZNF278siRNA片段,并转染胃癌AGS细胞,转染阴性对照siRNA和RPMll640分别作为阴性对照组和空白对照组。以定量RT-PCR和蛋白质印迹法分别检测ZNF278mRNA和蛋白表达,利用MTT和细胞计数法检测细胞增殖情况,流式细胞术检测细胞周期变化。结果：胃癌AGS细胞中ZNF278表达明显高于正常胃上皮细胞GES-1。ZNF278siRNA转染胃癌ACTS细胞后,ZNF278mRNA和蛋白表达均明显下调,而阴性对照组与空白对照组无明显差异。MTT法示ZNF278siRNA组AGS细胞增殖率显著低于阴性对照组（0．64±0．03对0．81±0．03,P〈0．01）,细胞计数法示细胞数量亦显著降低[（4．11±0．35）×10^5对（5．78±0．50）×10^5,P〈0．01],流式细胞术显示ZNF278siRNA组G0／G1期细胞明显增加而s期细胞明显减少（P〈0．05）。结论：转染ZNF278siRNA可抑制胃癌AGS细胞增殖,细胞周期阻滞于G0／G1期。     

Small molecular anticancer agent SKLB703 induces apoptosis in human hepatocellular carcinoma cells via the mitochondrial apoptotic pathway invitro and inhibits tumor growth invivo

Inducing apoptosis is a promising therapeutic approach to overcome cancer. Here we described that a novel synthesized compound, 3-amino-N-(4-chlorobenzyl)-6-(3-methoxyphenyl)thieno[2,3-b]pyridine-2-carboxamide (SKLB703), exhibits antitumor activity via inducing apoptosis both invitro and invivo. Our results showed that SKLB703 inhibited the proliferation of a panel of human cancer cell lines, and human hepatocellular carcinoma cell line HepG2 was the most sensitive. The proliferation inhibitory effect of SKLB703 was associated with its apoptosis-inducing effect by activating caspase-3 and caspase-9 rather than caspase 8. Exposure of HepG2 to SKLB703 also resulted in Bax upregulation, Bcl-2 downregulation, cytochrome c release and mitochondrial transmembrane potential change in mitochondrial apoptotic pathway. Moreover, the decrease of phosphorylated p 44/42 mitogen-activated protein kinase and phosphorylated Akt was observed. SKLB703 suppressed the growth of established tumors in xenograft models in mice, whereas no toxicity was exhibited. TUNAL analysis showed that SKLB703 induced HepG2 tumor apoptosis. Taken together, the present study demonstrates that SKLB730 exhibits its antitumor activity through inducing apoptosis via mitochondrial apoptotic pathway. Its potential to be a candidate of anticancer agent is worth being further investigated.     

ZNF488对电离辐射诱发的鼻咽癌细胞CNE1侵袭迁移能力的影响

[目的]研究ZNF488 siRNA对电离辐射诱发的鼻咽癌CNE1侵袭迁移能力的影响.[方法]采用qRT-PCR和Western blot检测ZNF488 siRNA转染效率.采用划痕实验和Transwell侵袭实验检测电离辐射对鼻咽癌CNE1细胞侵袭迁移能力的影响.采用划痕实验和Transwell侵袭实验检测沉默ZNF488后,电离辐射诱发的CNE1细胞侵袭迁移能力是否改变.[结果]在mRNA和蛋白水平,实验组(siZNF488组)表达量均明显低于对照组(siRNA-Ctrl 组),其中实验组ZNF488 mRNA水平为对照组的(0.54±0.12)倍(P=0.023).划痕实验证明电离辐射明显增强鼻咽癌CNE1细胞迁移能力;Traoswell侵袭实验检测到0Gy组侵袭细胞数为302.67± 18.77,4Gy组侵袭细胞数为371.67± 15.63,4Gy组侵袭细胞数为0Gy组(1.23±0.03)倍(P=0.006).沉默ZNF488后,电离辐射诱发的CNE1细胞侵袭迁移能力明显减弱,这一功能的实现与上皮间质转化(EMT)进程的逆转息息相关.[结论]ZNF488 siRNA通过逆转EMT进程抑制鼻咽癌细胞CNE1电离辐射诱发的侵袭迁移能力.     

ZNF365基因多态性与儿童支气管哮喘的相关性

目的 探讨我国中部湖北地区儿童ZNF365基因的两个SNP位点(rs2393903和rs10995251)的多态性与支气管哮喘及其临床特点的关系。方法 采用病例-对照的研究方法,选取湖北地区221例支气管哮喘患儿和243例同时期体检正常的儿童作为研究对象,利用限制性片段长度多态性分析的方法检测两个SNP位点的多态性分布。结果 哮喘患儿中SNP rs2393903位点的3种基因型(GG、GA、AA)分布及等位基因频率与正常对照组相比差异均无统计学意义;而SNP rs10995251位点的基因型(CC、CT、TT)以及等位基因频率与正常对照组相比差异有统计学意义(P< 0.05),C等位基因为风险因子(OR=1.380)。在哮喘患儿中SNP rs10995251位点CC基因型患儿血清免疫球蛋白E(IgE)的水平高于TT基因型患儿(P< 0.05)。结论 ZNF365基因SNP rs10995251位点的多态性与我国中部湖北地区儿童支气管哮喘的易感性相关;且该位点的多态性可能影响患儿血清IgE水平。     

ZNF671 DNA methylation as a molecular predictor for the early recurrence of serous ovarian cancer

Serous ovarian cancer is the most frequent type of epithelial ovarian cancer. Despite the use of surgery and platinum‐based chemotherapy, many patients suffer from recurrence within 6 months, termed platinum resistance. Currently, the lack of relevant molecular biomarkers for the prediction of the early recurrence of serous ovarian cancers is linked to the poor prognosis. To identify an effective biomarker for early recurrence, we analyzed the genome‐wide DNA methylation status characteristic of early recurrence after treatment. The patients in The Cancer Genome Atlas (TCGA) dataset who showed a complete response after the first therapy were categorized into 2 groups: early recurrence serous ovarian cancer (ERS, recurrence ≤12 months, n = 51) and late recurrence serous ovarian cancer (LRS, recurrence >12 months, n = 158). Among the 12 differently methylated probes identified between the 2 groups, we found that ZNF671 was the most significantly methylated gene in the early recurrence group. A validation cohort of 78 serous ovarian cancers showed that patients with ZNF671 DNA methylation had a worse prognosis (P < .05). The multivariate analysis revealed that the methylation status of ZNF671 was an independent factor for predicting the recurrence of serous ovarian cancer patients both in the TCGA dataset and our cohort (P = .049 and P = .021, respectively). Functional analysis revealed that the depletion of ZNF671 expression conferred a more migratory and invasive phenotype to the ovarian cancer cells. Our data indicate that ZNF671 functions as a tumor suppressor in ovarian cancer and that the DNA methylation status of ZNF671 might be an effective biomarker for the recurrence of serous ovarian cancer after platinum‐based adjuvant chemotherapy.     

Functional and structural evaluation of the meibomian gland using a LipiView interferometer in thyroid eye disease

Objective

The purpose of this study was to evaluate the structure and function of the meibomian gland and the incomplete blinking rate to understand the pathophysiology of dry eye in thyroid eye disease (TED) patients.

The schizophrenia susceptibility gene ZNF804A confers risk of major mood disorders

Objectives: Genome-wide association studies (GWAS) followed by independent replications suggest that ZNF804A is a risk gene for schizophrenia (SCZ), considering the substantial genetic overlap between SCZ and major mood disorders (e.g., bipolar disorder (BPD) and major depressive disorder (MDD)).

Methods: We collected the data of two ZNF804A single-nucleotide polymorphisms (SNPs rs1344706 and rs7597593) from European and Asian populations to perform systematic meta-analyses with major mood disorders in a total of 65,240 subjects.

Results: Meta-analysis showed that rs1344706 and rs7597593 were both associated with major mood disorders as well as diagnosis of either BPD or MDD, although neither of the analyses achieved a genome-wide level of statistical significance.

Conclusions: Our data provide evidence for the genetic involvement of ZNF804A SNPs in the susceptibility of major mood disorders, but further replication analyses in larger samples are necessary.     

A functional variant of the tryptophan hydroxylase 2 gene impacts working memory: a genetic imaging study

Imaging studies have demonstrated that prefrontal and parietal regions are activated during working memory (WM) tasks. Recently some molecular genetic studies reported associations between a functional promoter polymorphism of the tryptophan hydroxylase 2 gene (TPH2), that regulates the synthesis of serotonin, and attention. In 49 healthy Caucasian subjects the role of the TPH2 -703 G/T polymorphism for WM was tested by means of an imaging genomics approach in an n-back task. fMRI data showed an increased activation for the 2-back as compared to the 0-back condition for a large network in prefrontal and parietal areas. Although behavioural data showed no performance differences between the genotype groups of the -703 G/T a significantly stronger activation of the TT genotype carriers in BA 6, BA 46, and BA 40 was visible in contrast to the GT and GG groups. Present findings in congruence with previous findings support the hypothesis that TT carriers compensate deficits in executive control functions by increased brain activity.