SLC7A11-AS1调控miR-429对口腔鳞癌细胞CAL-27细胞增殖、凋亡及迁移的影响

目的 探讨SLC7A11-AS1对口腔鳞癌细胞CAL-27细胞增殖、 凋亡及迁移的影响及分子机制.方法 收集29例口腔鳞癌患者癌组织及癌旁组织;CAL-27细胞分为si-NC组、si-SLC7A11-AS1组、si-SLC7A11-AS1+anti-miR-NC组、si-SLC7A11-AS1+anti-miR-429...     

LncRNA SLC16A1-AS1 通过靶向 miR-15a-5p 负向调控子宫颈癌细胞的增殖和侵袭

目的探讨LncRNA SLC16A1-AS1通过靶向miR-15a-5p调控子宫颈癌细胞增殖和侵袭的作用机制。方法采用qRT-PCR法检测SLC16A1-AS1在子宫颈癌组织、癌旁组织、人正常子宫颈上皮细胞(H8)及子宫颈癌细胞株(HeLa、HCC94、SiHa、C33A)中的表达水平。选择SLC16A1-AS1表达最少的子宫颈癌细胞株,分别转染阴性质粒和SLC16A1-AS1过表达质粒,标记为NC组和SLC16A1-AS1组。应用MTT法和Transwell实验分别检测过表达SLC16A1-AS1对子宫颈癌细胞增殖和侵袭能力的影响。生物信息学网站预测及双荧光素酶报告基因实验,验证SLC16A1-AS1与靶基因的靶向关系。qRT-PCR和Western blot法检测靶基因及相关蛋白的表达。结果子宫颈癌组织中SLC16A1-AS1的表达水平显著低于癌旁组织(P0.01)。与H8细胞相比,HeLa、HCC94、SiHa、C33A细胞中SLC16A1-AS1的表达水平降低(P0.05)。与NC组相比,过表达SLC16A1-AS1的C33A细胞增殖能力降低(P0.05),过表达SLC16A1-AS1的C33A细胞侵袭数下降(P0.01)。生物信息学网站预测显示,SLC16A1-AS1可与miR-15a-5p有特异性结合位点。双荧光素酶报告基因实验结果证实SLC16A1-AS1可与miR-15a-5p直接结合(P0.01)。SLC16A1-AS1可负向调控miR-15a-5p的表达(P0.01)。与NC组相比,SLC16A1-AS1组细胞增殖表型蛋白(如PCNA、Ki-67)和细胞侵袭表型蛋白(如N-cadherin、Slug)表达均降低。结论 SLC16A1-AS1在子宫颈癌中低表达,SLC16A1-AS1通过靶向下调miR-15a-5p的表达,抑制子宫颈癌细胞C33A的增殖和侵袭。     

LncRNA SLC16A1-AS1靶向调控miR-182对乳腺癌BT549细胞增殖能力的影响

目的 探讨LncRNA SLC16A1-AS1对miR-182的靶向调控作用及对乳腺癌BT549细胞增殖能力的影响。方法 使用GEPIA2工具分析TCGA数据库中LncRNA SLC16A1-AS1在三阴型乳腺癌(triple negative breast cancer, TNBC)中的差异性表达，应用Kaplan-Meier Plotter数据库进行生存分析。利用RegRNA2和miRanda数据库预测LncRNA SLC16A1-AS1的潜在靶标miRNAs。用qRT-PCR检测LncRNA SLC16A1-AS1在TNBC组织及细胞系(BT549、BT20、MDA-MB-231及MDA-MB-468)中的表达。利用双荧光素酶活性测定及RNA免疫沉淀实验验证LncRNA SLC16A1-AS1与miR-182的结合力。用CCK-8及集落形成实验检测不同处理组BT549细胞增殖能力的变化。结果 生物信息学分析结果显示，TNBC组织中LncRNA SLC16A1-AS1的表达水平显著低于正常组织(P<0.001),与预后良好相关(P<0.001),LncRNA SLC16...     

lncRNA FGD5-AS1调节miR-129-5p/SOX4轴对子宫内膜癌细胞恶性生物行为的影响

目的 探讨lncRNA FGD5-AS1调节miR-129-5p/SOX4轴对子宫内膜癌（EC）细胞恶性生物行为的影响。方法 qRT-PCR、Westernblot分别检测人EC细胞HEC-1A以及人子宫颈内膜细胞End1/E6E7中lncRNAFGD5-AS1、miR-129-5p、SOX4蛋白表达；将HEC-1A细胞分为NC组、si-NC组、si-FGD5-AS1组、si-FGD5-AS1+inhibitor NC组、si-FGD5-AS1+miR-129-5p inhibitor组。双萤光素酶报告基因实验检测lncRNA FGD5-AS1、miR-129-5p、SOX4的关系；qRT-PCR检测HEC-1A细胞中lncRNAFGD5-AS1、miR-129-5p表达；CCK-8法检测HEC-1A细胞增殖情况；流式细胞术检测HEC-1A细胞凋亡；Transwell检测HEC-1A细胞侵袭、迁移数量；Westernblot检测HEC-1A细胞SOX4、E-cadherin、Vimentin、N-cadherin蛋白水平。结果 与End1/E6E7细胞相比，HEC-1A细胞中lncRN...     

白果内酯调控LEF1-AS1/miR-23b-3p分子轴缓解肺炎链球菌诱导的肺泡上皮细胞损伤

目的探讨白果内酯对肺炎链球菌诱导的肺泡上皮细胞损伤的保护作用及其对lncRNA LEF1-AS1/miR-23b-3p分子轴的调控作用。方法用肺炎链球菌诱导肺泡上皮细胞建立细胞损伤模型(感染组);分别转染si-NC、si-LEF1-AS1后,用肺炎链球菌感染细胞(感染+si-NC组和感染+si-LEF1-AS1组);pcDNA、pcDNA-LEF1-AS1分别转染至肺泡上皮细胞后用白果内酯与肺炎链球菌共同处理细胞(感染+白果内酯+pcDNA组和感染+白果内酯+pcDNA-LEF1-AS1组)。ELISA法检测TNF-α、IL-1β、IL-6的水平;流式细胞术检测细胞凋亡率;q RT-PCR法检测LEF1-AS1、miR-23b-3p的表达量;双荧光素酶报告基因实验检测LEF1-AS1与miR-23b-3p的靶向关系;Western blot检测Bcl-2、Bax蛋白表达量。结果白果内酯能够降低肺炎链球菌诱导的肺泡上皮细胞中TNF-α、IL-1β、IL-6的水平和LEF1-AS1的表达量(P<0.05),并可降低凋亡率和Bax蛋白水平(P<0.05),还可促进miR-23b-...     

长链非编码RNA SLC25A25-AS1对胃癌细胞及对5-氟尿嘧啶耐药的作用

目的观察长链非编码RNA SLC25A25-AS1对胃癌(GC)细胞增殖、凋亡能力以及对5-氟尿嘧啶(5-Fu)化疗耐药的影响,并探讨其机制。方法采用实时荧光聚合酶链反应法(RT-PCR)检测正常胃黏膜(GSE-1)和GC细胞(SGC-7901,BGC-823)中SLC25A25-AS1和β-catenin的表达水平;在胃癌细胞SGC-7901和BGC-823中过表达SLC25A25-AS1后,通过RT-PCR检测β-catenin的表达水平;在胃癌细胞SGC-7901细胞中过表达SLC25A25-AS1后,再过表达β-catenin,应用CCK-8法检测转染后各组吸光值以评价增殖率,应用Annexin VAPC单染色流式细胞术检测各组转染48 h后的细胞凋亡率,在培养基中加入不同浓度的5-Fu检测各组细胞存活率。结果与正常胃黏膜细胞相比, GC细胞中SLC25A25-AS1低表达,β-catenin过表达(P0.05);过表达SLC25A25-AS1后胃癌细胞β-catenin表达下调(P0.05);胃癌SGC-7901细胞过表达SLC25A25-AS1后细胞增殖转移能力明显减弱(P0.05),凋亡增加(P0.05),化疗耐药减弱(P0.05);而过表达β-catenin后恶性表型明显恢复(P0.05)。结论 SLC25A25-AS1调节胃癌细胞增殖、凋亡和化疗耐药,参与GC的发生发展,与抑制β-catenin的表达相关。     

长链非编码RNA AGAP2-AS1对肾细胞癌侵袭转移能力的影响

目的观察长链非编码RNAAGAP2-AS1(lnc RNAAGAP2-AS1)对肾细胞癌(renalcell carcinoma, RCC)细胞侵袭转移能力的影响,及其可能机制。方法采用实时荧光聚合酶链反应法(RT-PCR)检测近端肾小管上皮细胞(HK-2)和RCC细胞(A498、ACHN)中lnc RNA AGAP2-AS1和EZH2的表达水平,在肾癌细胞A498中敲除AGAP2-AS1后,通过RT-PCR检测EZH2的表达水平。在肾癌细胞A498中敲降AGAP2-AS1后,再过表达EZH2,应用划痕实验与Transwell实验检测肾癌细胞侵袭转移能力的改变。结果与肾小管上皮细胞相比,RCC细胞中EZH2和lnc RNA AGAP2-AS1的表达水平均明显升高(P0.05);抑制AGAP2-AS1表达后肾癌细胞中EZH2表达下调;肾癌A498细胞敲降AGAP2-AS1后细胞侵袭转移能力明显减弱(P0.05),而过表达EZH2后侵袭与转移能力明显恢复(P0.05)。结论 lnc RNA AGAP2-AS1促进RCC细胞的侵袭和转移,与上调EZH2的表达水平相关。     

lncRNA FGD5-AS1靶向miR-15a-5p调控LPS诱导的脓毒症细胞损伤

目的:探讨长链非编码RNA FGD5-AS1(lncRNA FGD5-AS1)对LPS诱导的脓毒症细胞损伤的影响及分子机制。方法:500 ng/ml脂多糖(LPS)诱导THP-1细胞损伤。THP-1细胞分为对照组、LPS组、pcDNA组、pcDNA-FGD5-AS1组、anti-miR-NC组、anti-miR-15a-5p组、pcDNA-FGD5-AS1+miR-NC组、pcDNA-FGD5-AS1+miR-15a-5p组。RT-qPCR检测lncRNA FGD5-AS1和miR-15a-5p表达;流式细胞术检测细胞凋亡;Western blot法检测蛋白表达;ELISA检测IL-6、IL-1β、TNF-α水平。双荧光素酶报告实验检测lncRNA FGD5-AS1和miR-15a-5p的靶向关系。结果:与对照组相比,经LPS诱导的THP-1细胞中,lncRNA FGD5-AS1表达降低,miR-15a-5p表达升高(P<0.05)。过表达lncRNA FGD5-AS1和下调miR-15a-5p均能够显著降低细胞凋亡以及炎症细胞因子IL-6、IL-1β、TNF-α表达(P<...     

唐山市甲型H1N1流感病毒血凝素基因序列分析

目的 分析2010—2016年唐山市甲型H1N1流感病毒血凝素(hemagglutinin,HA)基因序列进化特征.方法 选取唐山市3家哨点医院流感样病例分离到的24株甲型H1N1病毒,通过RT-PCR和测序方法获得HA基因的全长序列,运用分子生物学软件和统计学软件对序列进行拼接、比对和分析.结果 同源进化分析显示,24株甲型H1N1流感病毒HA基因与疫苗株A/California/7/2009的核苷酸和氨基酸的同源性分别为97.0%~99.0%和97.0%~98.5%.进化分析显示,2010—2016年唐山地区流行的甲型H1N1流感病毒属于1、7、6三个基因分支,其中6分支毒株分为6C、6B、6B.1和6B.2亚支.氨基酸位点分析显示,不同毒株与疫苗株比较存在8~16处氨基酸位点改变,其中7个变异涉及3个抗原表位:H138Q/Y和S203T突变位于Ca区,N125S、K153E、S162N、K163T/Q突变位于Sa区,S185T突变位于Sb区同时也位于受体结合部位;2015—2016流行季6B.1分支毒株抗原位点S162N突变增加了新的潜在糖基化位点.结论 与疫苗株比较,随着时间推移唐山地区甲型H1N1流感病毒发生了抗原漂变,未来仍应关注6B分支流行株的变化.     

lncRNA LEF1-AS1通过miR-212-5p影响IL-1β诱导的软骨细胞凋亡及炎性因子分泌

为探讨长链非编码RNA(long non-coding RNA,lncRNA)淋巴增强因子1反义RNA 1(lymphatic enhancer factor 1 antisense RNA 1,LEF1-AS1)靶向miR-212-5p对IL-1β诱导的软骨细胞凋亡和炎性因子分泌的影响，采用qRT-PCR分析骨关节炎(osteoarthritis, OA)患者软骨细胞中LEF1-AS1和miR-212-5p的表达。用10 ng/mL的IL-1β处理人正常软骨细胞建立体外OA细胞模型。运用FACS分析软骨细胞凋亡率；ELISA检测培养上清液中IL-6、TNF-α、IFN-γ水平；qRT-PCR检测LEF1-AS1和miR-212-5p表达水平。同时，将LEF1-AS1小干扰RNA、miR-212-5p模拟物转染软骨细胞，并检测抑制LEF1-AS1或过表达miR-212-5p对IL-1β诱导的软骨细胞凋亡及炎性因子分泌的影响。qRT-PCR和双荧光素酶报告基因试验分析LEF1-AS1与miR-212-5p的靶向关系。结果显示，IL-1β处理显著增加软骨细胞的凋亡率(P<0.05),...     

COL1A1 and COL1A2 variants in Ehlers-Danlos syndrome phenotypes and COL1-related overlap disorder

Pathogenic variants in COL1A1 and COL1A2 are involved in osteogenesis imperfecta (OI) and, rarely, Ehlers-Danlos syndrome (EDS) subtypes and OI-EDS overlap syndromes (OIEDS1 and OIEDS2, respectively). Here we describe a cohort of 34 individuals with likely pathogenic and pathogenic variants in COL1A1 and COL1A2, 15 of whom have potential OIEDS1 (n = 5) or OIEDS2 (n = 10). A predominant OI phenotype and COL1A1 frameshift variants are present in 4/5 cases with potential OIEDS1. On the other hand, 9/10 potential OIEDS2 cases have a predominant EDS phenotype, including four with an initial diagnosis of hypermobile EDS (hEDS). An additional case with a predominant EDS phenotype had a COL1A1 arginine-to-cysteine variant that was originally misclassified as a variant of uncertain significance despite this type of variant being associated with classical EDS with vascular fragility. Vascular/arterial fragility was observed in 4/15 individuals (including one individual with an original diagnosis of hEDS), which underscores the unique clinical surveillance and management needs in these patients. In comparison to previously described OIEDS1/2, we observed differentiating features that should be considered to refine currently proposed criteria for genetic testing in OIEDS, which will be beneficial for diagnosis and management. Additionally, these results highlight the importance of gene-specific knowledge for informed variant classification and point to a potential genetic resolution (COL1A2) for some cases of clinically diagnosed hEDS.     

DETECTION OF A1A2 AND A2AAm1 HETEROZYGOTES AMONG HUMAN A BLOOD GROUP PHENOTYPES

From the variations of α-N-acetylgalactosaminyltransferases activities with the pH, evidence was obtained for the recognition of A₁A₂ heterozygotes in normal A blood group sera. Besides, unusual transferase properties associated with two A₂ sera from individuals out of A^A_m1 siblings, lead to the identification of the very infrequent A₂A^A_m1 genotypes. These results strongly support the simultaneous coexistence of both A₁ and A₂ transferases in heterozygotes' sera, and bring some new information on the genetical background of the A_m phenotype. The meaning of transferase properties directly determined on whole sera is briefly discussed.     

BPOZ-2 directly binds to eEF1A1 to promote eEF1A1 ubiquitylation and degradation and prevent translation

Bood POZ containing gene type 2 (BPOZ-2), which contains ankyrin repeats, NLS, BTB/POZ domains and LXXLL motifs, is an adaptor protein for the E3 ubiquitin ligase scaffold protein CUL3. We isolated a cDNA encoding eukaryotic elongation factor 1A1 (eEF1A1) as a BPOZ-2 binding protein by screening a human thymus cDNA library using a yeast two-hybrid system. eEF1A1 is essential for translation and is also involved in the 26S proteasome-dependent degradation of misfolded or unfolded proteins. The binding between BPOZ-2 and eEF1A1 was confirmed by pull-down and immunoprecipitation assays in vitro and in vivo , respectively. BPOZ-2 binds to eEF1A1 through the ankyrin repeats and both BTB/POZ domains in BPOZ-2 and Domains I and III in eEF1A1. BPOZ-2 and eEF1A1 over-expressed in HEK 293T cells co-localized as speckles within the cytoplasm. BPOZ-2 promoted eEF1A1 ubiquitylation and degradation, suggesting that eEF1A1 is a substrate of BPOZ-2. BPOZ-2 inhibited GTP binding to eEF1A1 and prevented translation in in vitro translation assay using rabbit reticulocytes.     

Prevalence of uridine glucuronosyl transferase 1A1 (UGT1A1) mutations in Malay neonates with severe jaundice

A number of genetic risk factors have been implicated in the development of neonatal severe hyperbilirubinaemia. This includes mutations in the uridine glucoronosyl transferase 1A1 (UGT1A1) gene which is responsible for unconjugated hyperbilirubinemia in Gilbert's Syndrome. We studied the prevalence of UGT1A1 gene mutations in a group of Malay neonates to determine whether they are risk factors to severe neonatal jaundice. One hundred and twenty-five Malay neonates with severe hyperbilirubinemia were studied. Ninety-eight infants without severe hyperbilirubinaemia were randomly selected from healthy Malay term infants (controls). DNA from EDTA cord blood samples were examined for UGT1A1 mutations nt211G > A and nt247T > C using established Taqman SNP genotyping assays and the UGT1A1*28 variant was detected by the Agilent 2100 bioanalyzer. All samples were also screened for common Malay G6PD variants using established techniques. The frequency of UGT1A1 211G > A mutation is significantly higher in the severely hyperbilirubinemic group (13%) than the control group (4%; p = 0.015) and all the positive cases were heterozygous for the mutation. There was no significant difference in the frequency of UGT1A1*28 mutation between the severely hyperbilirubinemic (3.5%) and the control group (0.01%; p = 0.09). None of the neonates in both groups carried the nt247 T > C mutation. The prevalence of G6PD mutation was significantly higher in the severely jaundiced group than control (9% vs 4%; p = 0.04). In conclusion, nt 211 G > A alleles constitute at least 12% of UGT1A1 mutations underlying unconjugated hyperbilirubinemia and appears to be a significant independent risk factor associated with severe neonatal hyperbilirubinemia in the Malay newborns.     

Detection of A1A2 and A2AAm1 heterozygotes among human A blood group phenotypes.

From the variations of alpha-N-acetylgalactosaminyltransferases activities with the pH, evidence was obtained for the recognition of A1A2 heterozygotes in normal A blood group sera. Besides, unusual transferase properties associated with two A2 sera from individuals out of AAm1 siblings, lead to the identification of the very infrequent A2AAm1 genotypes. These results strongly support the simultaneous coexistence of both A1 and A2 transferases in heterozygotes' sera, and bring some new information on the genetical background of the Am phenotype. The meaning of transferase properties directly determined on whole sera is briefly discussed.