Effects of Heterologously Overexpressing PIP5K-Family Genes in Arabidopsis on Inflorescence Development

Castor is one of the top 10 oil crops in the world and has extremely valuable uses.Castor inflorescences directly affect yield,so the study of inflorescence development is very important in increasing castor yield.Our previous studies have shown that the PIP5K gene family(PIP5Ks)is associated with inflorescence development.In this study,to determine the function of each PIP5K gene in castor,a female Lm-type castor line,aLmAB2,was used to determine the relative expression levels of the PIP5Ks in castor inflorescences.Six PIP5K genes were heterologously overexpressed in Arabidopsis thaliana,the relative expression of each gene and the effect on plants was determined in A.thaliana,and the relationships among the PIP5Ks in castor were inferred.The expression levels of the PIP5Ks in the female Lm-type castor line aLmAB2 were analyzed.The relative expression levels of the PIP5K9 and PIP5K11 genes were high(p<0.05)in isofemale inflorescences,and those of PIP5K1,PIP5K2,PIP5K6,and PIP5K8 were high(p<0.05)in female inflorescences but low(p<0.05)in bisexual inflorescences.The PIP5Ks were heterologously overexpressed in A.thaliana,and T3-generation plants with stable genetic resistance,i.e.,AT-PIP5K^(+)plants(AT-PIP5K1^(+),AT-PIP5K2^(+),AT-PIP5K6^(+),AT-PIP5K8^(+),AT-PIP5K9^(+),and ATPIP5K11^(+) plants),were obtained.Biological tests of the AT-PIP5K+plants showed that the growth of the main stem was significantly delayed in AT-PIP5K+plants compared with Columbia wild-type(WT)A.thaliana plants;the PIP5K1 and PIP5K2 genes promoted lateral stem growth and flower and silique development;and the PIP5K6,PIP5K8,PIP5K9 and PIP5K11 genes inhibited lateral stem growth and flower and silique development.The correlations among PIP5Ks in castor suggest that there may be a synergistic relationship among PIP5K1,PIP5K2,and PIP5K6 in castor inflorescences,and PIP5K8,PIP5K9,and PIP5K11 are complementary to the other three genes.

The Influence of Aerial Exposure on Sea Anemones Aulactinia veratra Mucin Genes Expression Using the RNA Sequencing

Mucin genes are the main component of mucus. The sea anemone species, Aulactinia veratra (Phylum Cnidaria) contains different types of mucin genes. In the intertidal zone, A. veratra is found to be exposed to air during the low tide and produces large quantities of mucus as an external covering. The relation between low tide and mucus secretion is still unclear, and what is the role of mucin during arial exposure is not yet investigated. This study hypothesised that the mucin genes in A. veratra would have significantly high expression in response to aerial exposure. Therefore, the aim of current study was to examine and analyses the response of A. veratra mucins in response to an experiment involving three hours of aerial exposure. To achieve this, aim the RNA-sequencing and bioinformatics analyses were used to examine the expression profile of A. veratra mucin genes in response to aerial exposure. The generated results have shown that, Mucin4-like and mucin5B-like were up-regulated in response to the three hours of aerial exposure in A. veratra. This finding shows a significant role of mucin5B-like and mucin4-like genes in response to air stress at low tide. The data generated from this study could be used in conjunction with future mucin gene studies of sea anemones and other cnidarians to compare A. veratra mucin gene expression results across time, and to extend our understanding of mucin stress response in this phylum.

Analysis of functional hub genes indicates DLGAP5 is linked to lung adenocarcinoma prognosis

Introduction:The difficulty in treating lung adenocarcinoma(LUAD)is caused by a shortage of knowledge about the biological mechanisms and a lack of treatment choices.Objectives:The aim of this study was to identify a valuable molecular target for the treatment of LUAD.Methods:Using multiple databases,we screened for hub genes in LUAD using Cytoscape and explored the expression and prognosis of DLG associated protein 5(DLGAP5)in LUAD.We investigated the genetic variation,functional enrichment,and epigenetic activity of DLGAP5.Furthermore,we evaluated the relationship between the tumor microenvironment(TME)and DLGAP5.Results:Our study identified 10 hub genes in LUAD:CDC45,KIAA0101,DLGAP5,CDT1,NCAPG,CCNB1,CDCA5,CDC20,KIF11,and AURKA.We discovered that DLGAP5 was overexpressed and associated with poor prognosis in LUAD.DLGAP5 exhibited an overall genetic variation frequency of 2%,and its DNA promoter was hypomethylated in LUAD(p<0.05).The expression of DLGAP5 in LUAD showed a positive correlation with the majority of N6-methyladenosine(m6A)-methylation genes.Additionally,DLGAP5 was primarily associated with the cell cycle in LUAD.Notably,there was a significant favorable association between DLGAP5 and CD274,CTLA4,HAVCR2,and LAG3 in LUAD.Conclusion:DLGAP5 may be a therapeutic target for LUAD,as it affects cancer cells proliferation and development through the regulation of cell-cycle checkpoints and modulation of immune cell infiltration and immune checkpoints in the TME.

Spacer Length Variation in Rice 5SrRNA Genes Revealed by Polymerase Chain Reaction

Polymerase chain reaction(PCR) was used to amplify 5S rRNA spacer from wild rice(Oryza rufipogon and O.nivara) and cultivated rice(indica and japonica varieties of O.sativa L).The results show that there is spacer length variation within and between species,and the typical indica and japonica varieties have their unique banding patterns of amplified 5S rRNA spacers,whereas intermediate showed no specific amplification profile of spacer regions.The 5S rRNA genes in intermediate are either identical with that of indica variety or that of japonica variety.These data suggest that the spacer length polymorphisms can be used to distinguish between closely ralated species and subspecies.

Effects of Chronotherapy of Benazepril on the Diurnal Profile of RAAS and Clock Genes in the Kidney of 5/6 Nephrectomy Rats

Summary： This study investigated the effects of benazepril administered in the morning or evening on the diurnal variation of renin-angiotensin-aldosterone system （RAAS） and clock genes in the kidney. The male Wistar rat models of 5/6 subtotal nephrectomy （STNx） were established. Animals were ran- domly divided into 4 groups： sham STNx group （control）, STNx group, morning benazepril group （MB） and evening benazepril group （EB）. Benazepril was intragastfically administered at a dose of 10 mg/kg/day at 07：00 and 19：00 in the MB group and EB group respectively for 12 weeks. All the animals were synchronized to the light：dark cycle of 12：12 for 12 weeks. Systolic blood pressure （SBP）, 24-h urinary protein excretion and renal function were measured at 11 weeks. Blood samples and kidneys were collected every 4 h throughout a day to detect the expression pattern of renin activity （RA）, angio- tensin Ⅱ （Ang Ⅱ ） and aldosterone （Aid） by radioimmunoassay （RIA） and the mRNA expression profile of clock genes （bmall, dbp and per2） by real-time PCR at 12 weeks. Our results showed that no signifi- cant differences were noted in the SBP, 24-h urine protein excretion and renal function between the MB and EB groups. There were no significant differences in average Aid and RA content of a day between the MB group and EB group. The expression peak of bmall mRNA was phase-delayed by 4 to 8 h, and the diurnal variation of per2 and dbp mRNA diminished in the MB and EB groups compared with the control and STNx groups. It was concluded when the similar SBP reduction, RAAS inhibition and clock gene profile were achieved with optimal dose of benazepril, morning versus evening dosing of benazepril has the same renoprotection effects.

Reference genes for quantitative real-time PCR analysis and quantitative expression of P5CS in Agropyron mongolicum under drought stress

Reference genes, stably expressing in different tissues and cells, are commonly used as the references in expression analysis. Selecting the optimum reference gene is crucial to the success of experiments. In this study, the expression stabilities of nine common reference genes, including ACT2, 18 S r RNA, APRT, EF-1α, RNA POL II, TUBα, TUBβ, GAPDH and TLF of Agropyron mongolicum, were studied under drought condition. Among them, 18 S r RNA was found to be the most optimum reference gene under drought stress by the analyzing of ge Norm and Norm Finder software. Quantitative expression levels of P5 CS using 18 S r RNA as the reference gene, and proline contents under drought stress in A. mongolicum were further operated, and we found the expression level of P5 CS gene and proline content had a significantly positive relationship（R^2=0.7763, P〈0.05）. This study established and validated 18 S r RNA as the reference genes in A. mongolicum under drought stress, providing a powerful tool for the quantitative expression analysis of drought genes in A. mongolicum.

Transcriptomic analyses reveal new genes and networks response to H5N1 influenza viruses in duck(Anas platyrhynchos)

H5N1 influenza represents one of the great challenges to public health.Some H5N1 viruses(i.e.,A/goose/Hubei/65/05,GS/65) are weakly pathogenic,while the others(i.e.,A/duck/Hubei/49/05,DK/49) are highly pathogenic to their natural hosts.Here,we performed brain and spleen transcriptomic analyses of control ducks and ones infected by the DK/49 or the GS/65 H5N1 virus.We demonstrated that,compared to the GS/65 virus,the DK/49 virus infection changed more numerous immune genes’ expression and caused continuous increasing of immune pathways(i.e.,RIG-I and MDA5) in ducks.We found that both H5N1 virus strains might escape or subvert host immune response through affecting alternative translation of immune genes,while the DK/49 virus seemed to induce alternative translation of more immune genes than the GS/65 virus.We also identified five co-expressional modules associated with H5N1 virus replication through the weight correlation network analysis(WGCNA).Moreover,we first demonstrated that the duck BCL2 L15 and DCSTAMP in one of these five modules inhibited both the highly pathogenic and weakly pathogenic H5N1 virus replication efficiently.These analyses,in combination with our comprehensive transcriptomic data,provided global view of the molecular architecture for the interaction between host and H5N1 viruses.

Role of CARD15,DLG5 and OCTN genes polymorphisms in children with inflammatory bowel diseases

AIM: To investigate the contribution of variants of CARD15, OCTN1/2 and DLG5 genes in disease predispo- sition and phenotypes in a large Italian cohort of pediatric patients with inflammatory bowel diseases (IBD). METHODS: Two hundred patients with Crohn’s disease (CD), 186 ulcerative colitis (UC) patients, 434 par- ents (217 trios), and 347 healthy controls (HC) were studied. Polymorphisms of the three major variants of CARD15, 1672C/T and -207G/C SNPs for OCTN genes, IGR2096a_1 and IGR2198a_1 SNPs for the IBD5 locus, and 113G/A variant of the DLG5 gene were evaluated. Potential correlations with clinical sub-phenotypes were investigated. RESULTS: Polymorphisms of CARD15 were significantly associated with CD, and at least one variant was found in 38% of patients (15% in HC, OR = 2.7, P < 0.001). Homozygosis for both OCTN1/2 variants was more com- mon in CD patients (1672TT 24%, -207CC 29%) than in HC (16% and 21%, respectively; P = 0.03), with an in- creased frequency of the TC haplotype (44.8% vs 38.3% in HC, P = 0.04). No association with the DLG5 variant was found. CD carriers of OCTN1/2 and DLG5 variants more frequently had penetrating disease (P = 0.04 and P = 0.01), while carriers of CARD15 more frequently had ileal localization (P = 0.03). No gene-gene interaction was found. In UC patients, the TC haplotype was morefrequent (45.4%, P = 0.03), but no genotype/phenotype correlation was observed. CONCLUSION: Polymorphisms of CARD15 and OCTN genes, but not DLG5 are associated with pediatric on- set of CD. Polymorphisms of CARD15, OCTN, and DLG5 genes exert a weak influence on CD phenotype.

Analysis of Testicular Tissue Specific Expression of Mouse Novel Genes Dnajc5b and Cymg1

Mouse Dnajc5b and Cymg1 genes are new genes that we cloned specifically in mouse testis.Dnajc5b is a homolog of DNAJ(HSP40),subfamily C,and the second of member 5,so named Dnajc5b,which is located on chromosome 3 of mouse and contains five exons with a total length of 947 bp.The reading frame is 597 bp and encodes a total of 199 amino acids.Dnajc5b was specifically expressed in mouse testis as shown by multi-tissue RT-PCR.Dnajc5b was weakly expressed in the first week and the second week after the mice were born,and the expression was enhanced in the third week.The greatest expression was in the eighth week of sexual maturity.At the same time,in situ hybridization results showed that Dnajc5b gene was specifically expressed in mouse spermatogonia,and its expression was positively correlated with testicular development.Cymg1(GenBank accession No.AY600990),which has a full length of 0.78 kb,and contains four exons and three introns,was cloned from a mouse testis cDNA library.The gene is located in the 2G3 area of chromosome 2.The full cDNA encompasses the entire open reading frame,encoding 141 amino acid residues.CYMG1 has a 44%(48/108)identity with mouse CRES and 30%(42/140)identity with mouse cystatin C.Northern blot analysis showed that the Cymg1 is specifically expressed in adult mouse testes.Immunohistochemistry revealed that the CYMG1 protein was expressed in mouse testes spermatogonium,spermatocytes,round spermatids,elongating spermatids and spermatozoa.RT-PCR results also showed that Cymg1 was expressed in mouse testes and spermatogonium.The Cymg1 expression level varied in different developmental stages.The Cymg1 expression level in the testes over different developmental stages correlates with the mouse spermatogenesis and sexual maturation process.

Variation and evolution of NP genes of human avian H_5N_1 virus strains

In order to reveal variation and revolution of NP genes of human avian H5 N1 influenza virus strains, the NP gene of a human avian H5 N1 influenza virus strain in Guangdong was sequenced and the global NP genes of strains were retrieved. The sequences were analyzed by DNAStar 5.0, and the evolutionary speed was studied with reference to the epidemiological data. It was found that NP genes of 45 strains during 1997-2006 were homologically classified into three groups： strains in 1997-1998, strains in 2004-2005 and strains from 2003 to 2006. There were 35 substitutions in NPs in all strains accounting for a ratio of 7.03% （35/498）. An additional glycoprotein domain （NGT430-432） was found in NP genes in the strains of 2003-2006, the mutation of N370S in GD-01-06 resulted in occurrence of one more glycoprotein domain （NES368-370）. In the synonymous variation, Ks values in NP were 2.03 × 10^-5-2.55 × 10^-5 Nt/d and K. values in NP were 1.58 × 10^-6-3.10 × 10^-6 Nt/d. There didn＇t exist obviously selective pressure. An additional glycoprotein domain in every strain of 2003-2006 and one more in strain GD-01-06 might change the antigenicity of human avian H5 N1 influenza virus. The variation on human avian H5 N1 influenza strains occurred frequently in the natural world, which would result in high probability of human-human transmission along with the natural evolution of the virus.

ABI5–FLZ13 module transcriptionally represses growth-related genes to delay seed germination in response to ABA

The bZIP transcription factor ABSCISIC ACID INSENSITIVE5(ABI5)is a master regulator of seed germination and post-germinative growth in response to abscisic acid(ABA),but the detailed molecularmechanism by which it represses plant growth remains unclear.In this study,we used proximity labeling to map the neighboring proteome of ABI5 and identified FCS-LIKE ZINC FINGER PROTEIN 13(FLZ13)as a novel ABI5 interaction partner.Phenotypic analysis of flz13 mutants and FLZ13-overexpressing lines demonstrated that FLZ13 acts as a positive regulator of ABA signaling.Transcriptomic analysis revealed that both FLZ13 and ABI5 downregulate the expression of ABA-repressed and growth-related genes involved in chlorophyll biosynthesis,photosynthesis,and cell wall organization,thereby repressing seed germination and seedling establishment in response to ABA.Further genetic analysis showed that FLZ13 and ABI5 function together to regulate seed germination.Collectively,our findings reveal a previously uncharacterized transcriptional regulatorymechanismby which ABA mediates inhibition of seed germination and seedling establishment.

小儿脑性瘫痪与ATG5多态性的关联性及危险因素分析

目的分析自噬相关基因5(ATG5)多态性与小儿脑性瘫痪(CP)的关联性,探究影响CP发生的危险因素。方法选择2022年1月—2024年1月我院收治的118例CP患儿为研究对象,纳入研究组;选择同期收治的200例非CP小儿纳入对照组。应用聚合酶链式反应-限制性酶切片段长度多态性(PCR-RFLP)技术检测ATG5基因单核苷酸多态性(SNP)位点rs510432、rs573775、rs2299863、rs3804338、rs6568431多态性,采用酶联免疫吸附试验(ELISA)法检测2组儿童血浆ATG5水平,采用logistic回归分析ATG5基因多态性与小儿CP易感性的关系。结果研究组和对照组ATG5基因rs6568431位点AA、AC、CC基因型频率分别为25.42%、40.68%、33.90%和8.00%、40.00%、52.00%,差异有统计学意义(P<0.05),2组儿童rs510432、rs573775、rs2299863、rs3804338位点各基因型频率比较,差异均无统计学意义(P>0.05)。研究组和对照组儿童ATG5基因rs6568431位点A、C等位基因频率分别为45.76%、54.24%和28.00%、72.00%,差异有统计学意义(P<0.05),rs510432、rs573775、rs2299863、rs3804338位点各等位基因频率比较,差异均无统计学意义(P>0.05)。研究组儿童血浆ATG5水平为(8.42±0.95)ng/mL,明显低于对照组的(10.67±0.99)ng/mL,差异有统计学意义(t=19.872,P<0.05),且携带AA基因型儿童的血浆ATG5水平明显低于携带AC+CC基因型儿童,差异有统计学意义(P<0.05)。单因素分析结果显示,2组儿童母亲既往不良孕产史、母亲妊娠期高血压、母亲孕期羊水异常、宫内窘迫、病理性黄疸以及缺血缺氧性脑病情况的差异均有统计学意义(P<0.05)。多因素logistic回归分析结果显示,母亲有既往不良孕产史、母亲孕期羊水异常、宫内窘迫、病理性黄疸、缺血缺氧性脑病以及ATG5基因rs6568431位点多态性是CP发生的影响因素,差异均有统计学意义(P<0.05)。结论ATG5基因rs6568431位点多态性与小儿CP易感性存在关联性,且携带AA基因型可能增加小儿CP发生风险。此外,小儿CP的发生还与母亲既往不良孕产史、母亲孕期羊水异常、宫内窘迫、病理性黄疸以及缺血缺氧性脑病等多种因素有关,故针对高危因素进行积极预防,有助于减少小儿CP的发生。

血清抗黑色素瘤分化相关基因5阳性皮肌炎胸部CT特征定性及定量分析

目的 定性及定量分析血清抗黑色素瘤分化相关基因5(MDA-5)抗体阳性的皮肌炎患者胸部CT特征及其与短期预后的关系。资料与方法 回顾性纳入2017年1月—2018年12月中日友好医院收治的67例MDA-5阳性的皮肌炎患者,分析胸部CT特征与短期不良预后的关系。结果 9例患者1年内死亡。死亡组与存活组间质性肺疾病(ILD)影像学类型(χ^(2)=9.964,P=0.025)和肺动脉直径/主动脉直径比值(U=103.0,P=0.004)差异有统计学意义。抗MDA-5抗体阳性的皮肌炎患者合并ILD影像学类型主要为机化性肺炎。弥漫性肺泡损伤的患者死亡率显著高于其他几种类型。Logistic回归分析显示,肺动脉直径/主动脉直径比值(OR 4.208,P=0.002)是抗MDA-5抗体阳性的皮肌炎合并ILD患者发生死亡的强独立危险因素。结论 MDA-5阳性皮肌炎患者大部分伴ILD,其中以机化性肺炎为主要特征。1年内不良预后患者ILD类型不同,但肺动脉直径/主动脉直径比值是MDA-5阳性皮肌炎合并ILD患者发生死亡的独立危险因素。

乳腺癌组织miR-1247-5p表达及其靶基因生物信息学预测研究

目的:探讨微小核糖核酸-1247-5p(miR-1247-5p)在乳腺癌组织中的表达,并对其预测的靶基因进行生物信息学分析。方法:收集2019年6月至2020年12月本院手术治疗的104例乳腺癌患者癌组织及其癌旁组织。RT-PCR检测标本中miR-1247-5p的相对表达量;比较不同临床病理特征患者癌组织miR-1247-5p表达;预测miR-1247-5p的靶基因;采用DAVID数据库对miR-1247-5p靶基因进行功能和通路富集分析;String数据库对miR-1247-5p靶基因进行互作分析。结果:miR-1247-5p在乳腺癌组织中的表达水平较癌旁组织下调(P<0.05)。miR-1247-5p潜在靶基因38个,其靶基因功能主要富集于RNA聚合酶Ⅱ启动子的转录调控、基因表达/转录调控、质膜部分、突触小体、蛋白质结合、poly(A)RNA结合等;参与的通路主要富集于癌症通路、细胞因子与细胞因子受体的相互作用、磷脂酰肌醇3激酶(PI3K)-蛋白激酶B(Akt)信号通路等。磷酸酯酶与张力蛋白同源物(PTEN)、上皮生长因子受体(EGFR)、假尿苷酸合酶1(PUS1)的编码蛋白质在miR-1247-5p基因靶基因蛋白质互作网络(PPI)中关键节点位置。结论:miR-1247-5p在乳腺癌组织中的表达下调,其靶基因富集于多个生物学过程及与肿瘤相关的信号转导通路上,miR-1247-5p可能通过调控其靶基因的表达参与乳腺癌的发生发展过程。

抗MDA5抗体阳性幼年皮肌炎临床特点及治疗转归分析

目的分析抗黑色素瘤分化相关基因5(MDA5)抗体阳性幼年皮肌炎(JDM)的临床特点及治疗转归。方法收集首都医科大学附属北京儿童医院风湿科2015年6月至2022年2月收治的487例JDM患儿的临床资料,其中41例(8.42%)为抗MDA5抗体阳性者。对其临床特点、疾病评估、治疗药物及疾病转归进行总结分析。结果41例抗MDA5抗体阳性JDM患儿中,最常见的临床表现是皮肤和黏膜异常,其次为肌无力,发热和关节炎也较为常见,部分患儿出现呼吸系统症状和皮肤溃疡。皮肤评估工具(CAT)评分以3~5分占大多数。儿童肌炎评估量表(CMAS)评分为(33.88±9.57)分。间质性肺疾病(ILD)的发病率为87.80%,12.20%的患儿发展为快速进展型ILD(RP-ILD)。5例(12.20%)在病程中出现皮下钙化。90.24%的抗MDA5抗体阳性JDM患儿有高危病征。静脉注射甲基泼尼松龙(IVMP)(63.41%)、静脉注射免疫球蛋白(IVIG)(68.29%)和口服环孢素A(65.85%)是治疗的主要方法。9例(21.95%)患儿口服托法替布。75.61%的患儿表现为单一病程,19.51%的患儿为复发性病程,4.88%的患儿为持续的活动性病程。1年、2年、3年和4年的完全临床应答率分别为65.79%(25/38)、65.38%(17/26)、63.64%(14/22)和70.59%(12/17)。5年完全临床缓解率为14.29%(2/14),2年疾病复发率为19.23%(5/26)。在2年的随访中,95.00%(19/20)的患儿肺部病变完全吸收。随访3个月、6个月、9个月和12个月时,泼尼松的中位剂量分别为1.40 mg/kg、1.00 mg/kg、0.71 mg/kg和0.60 mg/kg,糖皮质激素停用的中位时间为69个月。截至2022年2月,41例患儿中有15例(36.59%)停用糖皮质激素,9例(21.95%)停用所有药物。结论抗MDA5抗体阳性JDM是一种特殊类型的JDM,主要表现为特征性皮疹、肌无力、发热和关节炎,ILD是主要危害。该病完全临床缓解率仍然较低,复发率相对较高。

ExosomalmicroRNA let-7c-5p enhances cell malignant characteristics by inhibiting TAGLN in oral cancer

Background:Oral cancer,a malignancy that is prevalent worldwide,is often diagnosed at an advanced stage.MicroRNAs(miRNAs)in circulating exosomes have emerged as promising cancer biomarkers.The role of miRNA let-7c-5p in oral cancer remains underexplored,and its potential involvement in tumorigenesis warrants comprehensive investigation.Methods:Serum samples from 30 patients with oral cancer and 20 healthy controls were used to isolate exosomes and quantify their RNA content.Isolation of the exosomes was confirmed through transmission electron microscopy.Quantitative PCR was used to assess the miRNA profiles.The effects of let-7c-5p and TAGLN overexpression on oral cancer cell viability,migration,and invasion were analyzed via CCK-8 and Transwell assays.Moreover,we conducted mRNA sequencing of exosomal RNA from exosomes overexpressing let-7c-5p to delineate the gene expression profile and identify potential let-7c-5p target genes.Results:let-7c-5p was upregulated in serumderived exosomes of patients with oral cancer.Overexpression of let-7c-5p in the TCA8113 and CAL-27 cell lines enhanced their proliferative,migratory,and invasive capacities,and overexpression of let-7c-5p cell-derived exosomes promoted oral cancer cell invasiveness.Exosomal mRNA sequencing revealed 2,551 differentially expressed genes between control cell-derived exosomes and overexpressed let-7c-5p cell-derived exosomes.We further identified TAGLN as a direct target of let-7c-5p,which has been implicated in modulating the oncogenic potential of oral cancer cells.Overexpression of TAGLN reverses the promoting role of let-7c-5p on oral cancer cells.Conclusion:Our findings highlight the role of exosomal let-7c-5p in enhancing oral cancer cell aggressiveness by downregulating TAGLN expression,highlighting its potential as a diagnostic and therapeutic strategy.

表达SFTSV Gn基因的重组5型腺病毒的构建与鉴定

为了构建出表达新布尼亚病毒(SFTSV)Gn基因的重组5型腺病毒,试验根据GenBank上发表的SFTSV Gn基因序列(登录号为ADZ04482.1)设计合成引物,采用特异性PCR方法在Gn基因前添加了KOZAK序列和tPA信号肽序列;然后通过酶切、连接等方法构建重组穿梭质粒PGA-KOZAK-tPA-Gn,与腺病毒骨架质粒pAd5-ΔE1ΔE3-5E4在BJ5183感受态细胞中进行同源重组,得到重组腺病毒质粒rAd5-KOZAK-tPA-Gn,用PacⅠ酶酶切重组腺病毒质粒,并将线性化的质粒转染至HEK 293细胞中进行病毒包装、扩繁和纯化;采用PCR扩增、Western-blot等技术检测病毒基因的表达情况,并测定重组腺病毒效价。结果表明:通过PCR扩增获得了1 546 bp的KOZAK-tPA-Gn基因,并成功构建了重组穿梭质粒;SFTSV Gn基因在重组腺病毒传代过程中稳定存在;重组腺病毒在HEK 293细胞中表达出分子量约为61 ku的SFTSV Gn蛋白;测得重组腺病毒效价为1×10^(-7.63)/0.1 mL TCID_(50)。说明试验成功构建出表达SFTSV Gn基因的重组5型腺病毒。

抗黑素瘤分化相关基因5抗体阳性皮肌炎合并快速进展性间质性肺病的临床特征及危险因素

目的:通过分析抗黑素瘤分化相关基因5抗体(MDA5)阳性皮肌炎(DM)患者合并快速进展性间质性肺病(RPILD)和非RPILD的临床特点差异,探讨合并RPILD发生的危险因素。方法:回顾性分析南京医科大学炎性肌病及结缔组织病相关间质性肺病专病联盟组织收集的251例抗MDA5抗体阳性皮肌炎(MDA5+DM)患者临床资料,将其根据有无合并RPILD进行分组,采用t检验、U检验、χ^(2)检验及Logistic回归分析合并RPILD患者的临床特点,探讨RPILD发生的危险因素。结果:将251例患者分为RPILD组(89例)和非RPILD组(162例),2组患者性别、年龄、病程、红细胞沉降率(ESR)、C反应蛋白(CRP)、抗Ro-52抗体阳性、铁蛋白(SF)、抗MDA5抗体滴度比较,差异均有统计学意义(P<0.05)。单因素Logistic回归分析显示年龄、ESR、抗MDA5抗体滴度、性别(男性)、CRP、抗Ro-52抗体均有统计学意义(OR>1,P<0.05);多因素Logistic回归分析显示性别(男性)、CRP、抗Ro-52抗体有统计学意义(OR>1,P<0.05)。结论:年龄、ESR、抗MDA5抗体滴度可能增加MDA5+DM患者发生RPILD的风险,但不是独立危险因素;性别(男性)、CRP升高、抗Ro-52抗体阳性可能是MDA5+DM患者合并RPILD的独立危险因素,均与RPILD的发生呈正相关。

血清SIRT1、Fibulin-5、Bcl-2/Bax与颈动脉粥样硬化斑块破裂所致脑梗死的关系及联合检测价值

目的 探讨血清沉默信息调节蛋白1 (SIRT1)、衰老关键蛋白抗原-5 (Fibulin-5)、B淋巴细胞瘤基因-2(Bcl-2)/B淋巴细胞瘤基因-2相关X蛋白(Bax)与颈动脉粥样硬化(CAS)斑块破裂所致脑梗死(ACI)的关系及联合检测价值。方法 选取新疆维吾尔自治区人民医院2021年1月至2023年2月CAS斑块破裂所致ACI患者98例作为研究组,另选取同期CAS斑块未破裂患者98例作为对照组,比较两组血清SIRT1、Fibulin-5、Bcl-2、Bax水平,分析各血清指标对CAS斑块破裂所致ACI风险的影响及与病情的关系,并评价各血清学指标单独及联合预测CAS斑块破裂所致ACI的价值。结果 研究组血清SIRT1、Bcl-2水平低于对照组,Fibulin-5、Bax水平高于对照组(P<0.05);大面积梗死(MCI)患者血清SIRT1、Bcl-2水平<小面积梗死患者<腔隙性梗死(LI)患者,Fibulin-5、Bax水平>小面积梗死患者> LI患者(P<0.05);重度神经功能缺损患者血清SIRT1、Bcl-2水平<中度神经功能缺损患者<轻度神经功能缺损患者,Fibulin-5、Bax水平>中度神经功能缺损患者>轻度神经功能缺损患者(P<0.05);血清SIRT1、Bcl-2低水平患者CAS斑块破裂所致ACI风险是高水平患者的2.311倍、2.921倍,Fibulin-5、Bax高水平患者CAS斑块破裂所致ACI风险是低水平患者的3.470倍、3.184倍(P<0.05);血清SIRT1、Bcl-2与梗死面积、神经功能缺损程度呈负相关,Fibulin-5、Bax与梗死面积、神经功能缺损程度呈正相关(P<0.05);血清SIRT1、Fibulin-5、Bcl-2、Bax预测CAS斑块破裂所致ACI的AUC分别为0.716 (95%CI:0.648~0.778)、0.796 (95%CI:0.733~0.850)、0.728 (95%CI:0.660~0.789)、0.763 (95%CI:0.698~0.821),联合预测CAS斑块破裂所致ACI的AUC为0.909 (95%CI:0.860~0.945),优于各血清指标单独预测。结论 血清SIRT1、Fibulin-5、Bcl-2/Bax与CAS斑块破裂所致ACI及其病情程度密切相关,联合预测价值可靠,对临床开展防治工作具有指导意义。

MBD5基因变异相关癫痫的临床表型及遗传学特点

目的总结MBD5基因变异相关癫痫患儿的临床表型及基因变异特点。方法回顾性分析2016年7月至2021年9月在北京大学第一医院儿科门诊就诊的9例MBD5基因变异癫痫患儿的病例资料,对其癫痫发作表现、脑电图、基因检测结果等进行分析。结果9例患儿中男6例、女3例,癫痫起病年龄范围为5~89月龄。癫痫发作类型多样,其中全面强直阵挛发作7例、肌阵挛发作和局灶性发作各5例、不典型失神发作3例、失张力发作2例,肌阵挛失神发作、痉挛发作、强直发作各1例,有8例患儿有2~6种发作类型。丛集性发作特点5例,热敏感特点2例。2例患儿有癫痫持续状态史。癫痫起病前均有发育迟缓,均有明显语言障碍,6例有孤独症样表现。患儿脑电图背景活动异常5例,9例发作间期有癫痫样放电。头颅磁共振成像均未见明显异常。发现MBD5基因点变异5例(c.300C>A/p.C100X、c.1775delA/p.N592Tfs*29、c.1759C>T/p.Q587X、c.150_151del/p.Lys51Asnfs*6、c.113+1G>C),MBD5基因整体杂合缺失1例,包括MBD5基因在内的大片段缺失3例,9例均为新发变异。末次随访年龄为2岁9月龄至11岁11月龄,末次随访时2例癫痫发作已缓解11个月至4年6个月,7例尝试多种抗癫痫发作药物仍有发作。结论MBD5基因变异患儿癫痫发作多在婴幼儿期发病,多数患儿有多种发作类型,发作可有丛集性及热敏感特点。多有发育迟缓、语言障碍和孤独症样行为。MBD5基因变异包括点变异和片段缺失。多为药物难治性癫痫。