Investigating the effect of rubiadin cytotoxicity and expression of BAX and BCL2 genes on HepG2 liver cancer cell line

Background:Rubiadin is a type of anthraquinone compound that can be found in Rubiaceae plants,such as Ronas.Nonetheless,only limited research has been done to explore the potential anticancer properties of rubiadin on liver cancer cells.Thus,the objective of the present study is to examine how rubiadin affects the viability of liver cancer cells as well as normal cells.Methods:HepG2 and AGO cell lines were assigned into controls(not exposed to rubiadin)and groups with exposure to rubiadin with 12.5,6.25,3.125,1.56,0.78,and 0.39μg/mL concentrations.3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-diphenytetrazoliumromide and reverse transcription-polymerase chain reaction were used to measure cell viability,and one-way analysis of variance was used for data analysis.Results:The viability of liver cancer cells was significantly reduced when exposed to 12.5,6.25,3.125,and 1.56μg/mL concentrations(P<0.01).An IC50 of 44.73μg/mL was reported.Furthermore,the BAX gene’s relative expression(P<0.05)was significantly increased and the BCL2 gene expression(P<0.05)was significantly reduced.The average ratio of BAX gene expression to BCL2 increased significantly(P<0.01).Conclusion:This research showed that rubiadin decreases cell viability by increasing the ratio of BAX gene expression to BCL2.In addition rubiadin has no cytotoxic effect on normal cells.

Identification of hub genes associated with Helicobacter pylori infection and type 2 diabetes mellitus:A pilot bioinformatics study

BACKGROUND Helicobacter pylori(H.pylori)infection is related to various extragastric diseases including type 2 diabetes mellitus(T2DM).However,the possible mechanisms connecting H.pylori infection and T2DM remain unknown.AIM To explore potential molecular connections between H.pylori infection and T2DM.METHODS We extracted gene expression arrays from three online datasets(GSE60427,GSE27411 and GSE115601).Differentially expressed genes(DEGs)commonly present in patients with H.pylori infection and T2DM were identified.Hub genes were validated using human gastric biopsy samples.Correlations between hub genes and immune cell infiltration,miRNAs,and transcription factors(TFs)were further analyzed.RESULTS A total of 67 DEGs were commonly presented in patients with H.pylori infection and T2DM.Five significantly upregulated hub genes,including TLR4,ITGAM,C5AR1,FCER1G,and FCGR2A,were finally identified,all of which are closely related to immune cell infiltration.The gene-miRNA analysis detected 13 miRNAs with at least two gene cross-links.TF-gene interaction networks showed that TLR4 was coregulated by 26 TFs,the largest number of TFs among the 5 hub genes.CONCLUSION We identified five hub genes that may have molecular connections between H.pylori infection and T2DM.This study provides new insights into the pathogenesis of H.pylori-induced onset of T2DM.

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.

猪嵌合RNA BCL2L2-PABPN1剪接调控、表达与亚细胞定位分析

相邻基因间顺式剪接(cis-splicing of adjacent gene,cis-SAGe)产生的嵌合RNA在细胞生长、疾病发生等生理活动中发挥重要作用,为探究cis-SAGe剪接调控机制,研究在前期克隆BCL2L2-PABPN1(BP)基础上,利用minigene、定点突变、瞬时转染、半定量RT-PCR以及生物信息学分析等方法分析BP转录后剪接的调控元件,发现thyroid hormone receptor exon 9、gh-1 intron 3、srp40-exonic splicing enhancer、β-tropomyosin exon 6b等剪接增强子元件在嵌合子形成中发挥重要作用。同时比较分析BP与两个亲本基因组织表达以及亚细胞定位情况。研究结果将为进一步揭示BP转录后调控机制及功能提供基础。

P53、Myc、BCL2在弥漫大B细胞淋巴瘤中的表达及对预后的影响

目的:探讨P53、Myc、BCL2在弥漫大B细胞淋巴瘤中的表达及对预后的影响。方法:选取40例弥漫大B细胞淋巴瘤患者,收集患者的淋巴结组织制作成组织切片,按照二步法免疫组化检测弥漫大B细胞淋巴瘤组织中的P53、Myc、BCL2表达,予以CHOP或R-CHOP方案化疗6~8个周期,观察患者P53、Myc、BCL2的阳性表达率,并分析P53、Myc、BCL2表达与临床资料及疗效之间的关系,比较双表达与三表达患者的生存时间。结果:P53、Myc、BCL2的阳性表达率分别是37.50%(15/40)、42.50%(17/40)、47.50%(19/40)。P53、Myc、BCL2表达在性别、年龄、Hans分型、分化程度、临床分期方面无显著差异(P>0.05),在疗效、风险程度、2年无进展生存期(PFS)率及2年总生存(OS)率方面差异有统计学意义(P<0.05)。双表达的生存时间均短于非双表达组,三表达的生存时间均短于非三表达组,差异有统计学意义(P<0.05)。结论:P53、Myc、BCL2在弥漫大B细胞淋巴瘤中呈异常表达,初步认定其表达与疗效、预后存在一定关联。

miR-204-5p靶向调控BCL2L2促进急性肝衰竭大鼠肝细胞凋亡的研究

目的探讨miR-204-5p在急性肝衰竭大鼠肝组织中的表达情况及其促进肝细胞凋亡的的作用及潜在机制。方法根据随机数字表法将32只SD大鼠分为4组,即对照组(0h)、模型组(24、48、72h),每组8只。模型组腹腔注射D-氨基半乳糖联合脂多糖诱导急性肝衰竭,对照组为腹腔内注射等量的0.9%氯化钠溶液。分别取对照组及模型组造模完成后24、48、72h大鼠静脉血及肝组织,ELISA检测血清丙氨酸氨基转移酶(alanine aminotransferase,ALT)、天冬氨酸基转移酶(aspartate aminotransferase,AST)、总胆红素(total bilirubin,TBIL)的水平,通过HE、TUNEL染色法行肝组织病理学检查和肝细胞凋亡观察。生物信息学工具预测miR-204-5p的靶基因,采用双荧光素酶报告基因实验验证两者的靶向关系。RT-PCR和Western blot法检测肝组织中miR-204-5p、BCL2L2的表达情况。结果与对照组比较,模型组随着造模时间的延长,ALT、AST、TBIL值逐渐升高,肝组织坏死程度、炎性细胞浸润逐渐加重,肝细胞凋亡指数逐渐升高。RT-PCR结果显示,随着造模时间的延长,miR-204-5p基因的相对表达水平逐渐升高,而BCL2L2基因的相对表达水平逐渐降低;Western blot法检测结果亦显示,BCL2L2蛋白表达水平逐渐降低(P均<0.05)。miR-204-5p和BCL2L2之间存在靶向关系,miR-204-5p能够靶向调控BCL2L2表达。结论miR-204-5p可能通过靶向调控BCL2L2促进肝细胞凋亡,进而促进急性肝衰竭疾病的发生、发展。

miR-153-3p靶向结合BCL2基因调控鼻咽癌细胞增殖、凋亡和周期的实验研究

目的探讨miR-153-3p调控鼻咽癌细胞增殖、凋亡和周期的作用。方法利用生物信息学软件对miR-153-3p的候选靶基因进行预测。实时荧光定量PCR和Western blotting分别检测miR-153-3p对细胞内mRNA和蛋白表达的影响。用密理博MUSETM细胞检测仪对细胞周期和细胞凋亡情况进行检测。用CCK8法和克隆技术形成实验检测细胞增殖能力。结果生物信息学预测结果显示,miR-153-3p与BCL2分子之间存在一个高可信度的结合区。miR-153-3p mimic能上调miR-153-3p的表达,降低BCL2蛋白的表达。与对照组相比,过表达miR-153-3p的6-10B细胞的凋亡明显增加,增殖能力受到显著抑制。结论miR-153-3p通过下调BCL2的表达,能够促进鼻咽癌细胞凋亡,抑制其增殖。

Role of p53 suppression in the pathogenesis of hepatocellular carcinoma

In the world,hepatocellular carcinoma(HCC)is among the top 10 most prevalent malignancies.HCC formation has indeed been linked to numerous etiological factors,including alcohol usage,hepatitis viruses and liver cirrhosis.Among the most prevalent defects in a wide range of tumours,notably HCC,is the silencing of the p53 tumour suppressor gene.The control of the cell cycle and the preservation of gene function are both critically important functions of p53.In order to pinpoint the core mechanisms of HCC and find more efficient treatments,molecular research employing HCC tissues has been the main focus.Stimulated p53 triggers necessary reactions that achieve cell cycle arrest,genetic stability,DNA repair and the elimination of DNA-damaged cells’responses to biological stressors(like oncogenes or DNA damage).To the contrary hand,the oncogene protein of the murine double minute 2(MDM2)is a significant biological inhibitor of p53.MDM2 causes p53 protein degradation,which in turn adversely controls p53 function.Despite carrying wt-p53,the majority of HCCs show abnormalities in the p53-expressed apoptotic pathway.High p53 in-vivo expression might have two clinical impacts on HCC:(1)Increased levels of exogenous p53 protein cause tumour cells to undergo apoptosis by preventing cell growth through a number of biological pathways;and(2)Exogenous p53 makes HCC susceptible to various anticancer drugs.This review describes the functions and primary mechanisms of p53 in pathological mechanism,chemoresistance and therapeutic mechanisms of HCC.

Detections of mefA, ermB, and mphA Macrolides Resistant Genes in Bacteria Isolated from Covid-19 Patients from Selected Health Facilities in Ibadan, Nigeria

Background: COVID-19 is a disease caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). Epidemiological data indicated that bacterial complications in COVID-19 would decrease clearance rate of the infecting agent and increase mortality rate. Macrolides such as Azithromycin are usually administered to COVID-19 patients as palliative treatments. Currently, a considerable number of bacterial strains have developed resistance to various antibiotics, especially macrolides. Resistance is reported to be due to possession of mefA, ermB, and mphA genes by Gram positive and Gram negative bacteria. Therefore, this study determined antibiotic resistance patterns and identify mefA, ermB and mphA macrolide-resistant genes in bacterial pathogens isolated from COVID-19 cases in Ibadan, Nigeria. Methods: 400 Nasopharyngeal samples were collected from symptomatic cases before antibiotic medication;structured questionnaires were administered to collect socio-demographic data of participants. Samples were cultured on Blood, Chocolate, MacConkey and Mannitol salt agar at 37°C for 48 hrs. Bacterial identification was performed using VITEK 2.0 ID cards and API 20E for Gram positive and negative bacteria respectively. Antibiotic Susceptibility Testing was performed using Kirby Bauer disc diffusion methods and VITEK 2.0 AST card kits. DNA of multidrug resistant bacterial isolates was extracted;resistant genes were determined using a polymerase chain reaction with specific primers. Amplified genes were detected using agarose gel electrophoresis. Results: 240 (60%) had bacterial growth and 97 (22.2%) yielded no growth. From the 240 bacterial isolates, 38 (15.83%) were multi-drug resistant including resistance to macrolides (Azithromycin) 20 (52.63%) of which were positive for either mefA or ermB, and none (0.0%) possess mphA gene;14 (36.8%) isolates had mefA gene, 10 (26.3%) isolates carried ermB gene. Conclusion: Multi-drug bacterial resistance including macrolides and quinolones was detected. Only mefA and ermB genes were detected in the bacterial isolates, especially in Gram positive organisms. The detection of mefA and ermB genes in the MDR bacterial isolates raised concern on the use of azithromycin as palliative treatment for COVID-19 symptomatic patients.

Identification and Expression Analysis of Abscisic Acid Signal Transduction Genes in Hemp Seeds

Abscisic acid(ABA)is involved in regulating diverse biological processes,but its signal transduction genes and roles in hemp seed germination are not well known.Here,the ABA signaling pathway members,PYL,PP2C and SnRK2 gene families,were identified from the hemp reference genome,including 7 CsPYL(pyrab-actin resistance1-like,ABA receptor),8 CsPP2CA(group A protein phosphatase 2c),and 7 CsSnRK2(sucrose nonfermenting1-related protein kinase 2).The content of ABA in hemp seeds in germination stage is lower than that in non-germination stage.Exogenous ABA(1 or 10μM)treatment had a significant regulatory effect on the selected PYL,PP2C,SnRK2 gene families.CsAHG3 and CsHAI1 were most significantly affected by exogenous ABA treatment.Yeast two-hybrid experiments were performed to reveal that CsPYL5,CsSnRK2.2,and CsSnRK2.3 could interact with CsPP2CA7 and demonstrate that this interaction was ABA-independent.Our results indicated that CsPYL5,CsSnRK2.2,CsSnRK2.3 and CsPP2CA7 might involve in the ABA signaling transduction pathway of hemp seeds during the hemp seed germination stages.This study suggested that novel genetic views can be brought into investigation of ABA signaling pathway in hemp seeds and lay the foundation for further exploration of the mechanism of hemp seed germination.

Study of pathogenic genes in a pedigree with familial dilated cardiomyopathy

BACKGROUND Dilated cardiomyopathy(DCM)is a genetically heterogeneous cardiac disorder characterized by left ventricular dilation and contractile dysfunction.The substantial genetic heterogeneity evident in patients with DCM contributes to variable disease severity and complicates overall prognosis,which can be very poor.AIM To identify pathogenic genes in DCM through pedigree analysis.METHODS Our research team identified a patient with DCM in the clinic.Through invest-igation,we found that the family of this patient has a typical DCM pedigree.High-throughput sequencing technology,next-generation sequencing,was used to sequence the whole exomes of seven samples in the pedigree.RESULTS A novel and potentially pathogenic gene mutation-ANK2p.F3067L-was discovered.The mutation was completely consistent with the clinical information for this DCM pedigree.Sanger sequencing was used to further verify the locus of the mutation in pedigree samples.These results were consistent with those of high-throughput sequencing.CONCLUSIONS ANK2p.F3067L is considered a novel and potentially pathogenic gene mutation in DCM.

Trifunctional Cu-Mesh/Cu_(2)O@FeO Nanoarrays for Highly Efficient Degradation of Antibiotic, Inactivation of Antibiotic-Resistant Bacteria, and Damage of Antibiotics Resistance Genes

Trifunctional Cu-mesh/Cu_(2)O@FeO nanoarrays heterostructure is designed and fabricated by integrating CuCu_(2)O@FeO nanoarrays onto Cu-mesh(CM)via an in situ growth and phase transformation process.It is successfully applied to efficiently mitigate the antibiotic pollution,including degradation of antibiotics,inactivation of antibiotic-resistant bacteria(ARB),and damage of antibiotics resistance genes(ARGs).Under visible-light irradiation,CM/CuCu_(2)O@FeO nanoarrays exhibit a superior degradation efficiency on antibiotics(e.g.,up to 99%in 25 min for tetracycline hydrochloride,TC),due to the generated reactive oxygen species(ROS),especially the dominant·O^(2−).It can fully inactivate E.coli(HB101)with initial number of~108 CFU mL^(−1) in 10 min,which is mainly attributed to the synergistic effects of 1D nanostructure,dissolved metal ions,and generated ROS.Meanwhile,it is able to damage ARGs after 180 min of photodegradation,including tetA(vs TC)of 3.3 log 10,aphA(vs kanamycin sulfate,KAN)of 3.4 log 10,and tnpA(vs ampicillin,AMP)of 4.4 log 10,respectively.This work explores a green way for treating antibiotic pollution under visible light.

Identification of key genes and biological pathways in lung adenocarcinoma by integrated bioinformatics analysis

BACKGROUND The objectives of this study were to identify hub genes and biological pathways involved in lung adenocarcinoma(LUAD)via bioinformatics analysis,and investigate potential therapeutic targets.AIM To determine reliable prognostic biomarkers for early diagnosis and treatment of LUAD.METHODS To identify potential therapeutic targets for LUAD,two microarray datasets derived from the Gene Expression Omnibus(GEO)database were analyzed,GSE3116959 and GSE118370.Differentially expressed genes(DEGs)in LUAD and normal tissues were identified using the GEO2R tool.The Hiplot database was then used to generate a volcanic map of the DEGs.Weighted gene co-expression network analysis was conducted to cluster the genes in GSE116959 and GSE-118370 into different modules,and identify immune genes shared between them.A protein-protein interaction network was established using the Search Tool for the Retrieval of Interacting Genes database,then the CytoNCA and CytoHubba components of Cytoscape software were used to visualize the genes.Hub genes with high scores and co-expression were identified,and the Database for Annotation,Visualization and Integrated Discovery was used to perform enrichment analysis of these genes.The diagnostic and prognostic values of the hub genes were calculated using receiver operating characteristic curves and Kaplan-Meier survival analysis,and gene-set enrichment analysis was conducted.The University of Alabama at Birmingham Cancer data analysis portal was used to analyze relationships between the hub genes and normal specimens,as well as their expression during tumor progression.Lastly,validation of protein expression was conducted on the identified hub genes via the Human Protein Atlas database.RESULTS Three hub genes with high connectivity were identified;cellular retinoic acid binding protein 2(CRABP2),matrix metallopeptidase 12(MMP12),and DNA topoisomerase II alpha(TOP2A).High expression of these genes was associated with a poor LUAD prognosis,and the genes exhibited high diagnostic value.CONCLUSION Expression levels of CRABP2,MMP12,and TOP2A in LUAD were higher than those in normal lung tissue.This observation has diagnostic value,and is linked to poor LUAD prognosis.These genes may be biomarkers and therapeutic targets in LUAD,but further research is warranted to investigate their usefulness in these respects.

电针对骶上脊髓损伤后神经源性膀胱大鼠尿流动力学及脊髓组织ERK/CREB/Bcl-2通路表达的影响

目的观察电针“次髎”“中极”“三阴交”“大椎”对骶上脊髓损伤后神经源性膀胱大鼠尿流动力学及脊髓组织ERK/CREB/Bcl-2通路表达的影响。方法60只雌性SD大鼠随机选取24只分为空白组和假手术组各12只,其余36只采用脊髓横断法造模,将成模大鼠随机分为模型组和电针组,每组12只。电针组取单侧“次髎”“中极”“三阴交”“大椎”进行电针刺激,每次30 min,1次/d,连续7 d。干预结束后行尿流动力学检测,HE染色观察大鼠膀胱逼尿肌组织形态,TUNEL法检测脊髓组织细胞凋亡情况,Western blot测定脊髓组织p-ERK1/2、p-CREB、p-p90Rsk、CRE、Bcl-2、Bax蛋白表达。结果与假手术组比较,模型组大鼠膀胱基础压力、最大压力及漏尿点压明显增加(P<0.01),膀胱最大容量及顺应性明显降低(P<0.01);膀胱平滑肌细胞结构严重破坏、排列紊乱,伴大量炎性细胞浸润;脊髓组织细胞凋亡率明显升高(P<0.01),脊髓组织p-ERK1/2、p-p90Rsk、p-CREB、CRE、Bcl-2蛋白表达明显降低,Bax蛋白表达明显升高(P<0.01)。与模型组比较,电针组大鼠膀胱基础压力、最大压力及漏尿点压均明显降低(P<0.05),膀胱最大容量及顺应性明显增加(P<0.05,P<0.01);膀胱平滑肌细胞完整性增强,细胞水肿程度降低,炎性细胞浸润减轻;脊髓组织细胞凋亡率明显降低(P<0.05),脊髓组织p-ERK1/2、p-p90Rsk、p-CREB、CRE、Bcl-2蛋白表达明显升高,Bax蛋白表达明显降低(P<0.05,P<0.01)。结论电针可促进骶上脊髓损伤后神经源性膀胱大鼠膀胱逼尿肌组织修复,增加膀胱最大容量及顺应性,缓解膀胱内高压状态,其机制与激活ERK/CREB/Bcl-2通路、减少受损神经元继发性凋亡、改善膀胱的神经支配、保护膀胱功能有关。

利咽启闭方对脑卒中大鼠吞咽功能及皮质吞咽中枢神经细胞凋亡的影响

背景:中药复方利咽启闭方治疗脑卒中吞咽障碍取得了良好疗效。外周血清5-羟色胺及中枢孤束核神经递质与吞咽密切相关,因此该研究利用分子生物学等现代医学实验方法,探索中药利咽启闭方对外周血清及吞咽中枢孤束核神经递质的调控作用,为其机制的探索开拓新思路。目的:验证利咽启闭方对脑卒中吞咽障碍的治疗作用,并探究其作用机制。方法:将38只SD大鼠随机分为模型组14只、治疗组14只和假手术组10只,模型组和治疗组采用线栓法短暂脑缺血90 min后再灌注进行造模,造模6 h后进行神经功能评分,选取评分为2分的大鼠进入后续实验;造模后第2天开始治疗组给予中药复方利咽启闭方灌胃治疗,其余两组给予生理盐水灌胃;造模后第2,7,14,30天记录各组大鼠的体质量及24 h进食、进水量;造模后第14,30天采用生物信号采集器及张力换能器检测大鼠吞咽启动反应时间及吞咽次数;吞咽功能检测后取材,采用TTC染色测定每组大鼠的脑缺血面积,采用免疫组化法检测延髓吞咽中枢孤束核5-羟色胺表达,采用RT-PCR、Western blot法检测各组大鼠岛叶、前运动皮质、扣带皮质、丘脑处BCL-2、BAX的mRNA及蛋白表达水平。结果与结论:①与假手术组相比,治疗组和模型组在灌胃第14天时的体质量、24 h进食量、进水量均减少,吞咽启动反应时间均延长,吞咽次数均减少(P<0.05);在灌胃第30天时,与模型组相比,治疗组大鼠体质量、24 h进食量、进水量均增加(P<0.05),但仍低于假手术组(P<0.05);②与模型组相比,治疗组大鼠的吞咽启动反应时间缩短、吞咽次数增加,但吞咽次数仍较假手术组减少,差异均有显著性意义(P<0.05);③治疗组大鼠脑缺血面积较模型组减小,治疗组延髓孤束核5-羟色胺阳性表达较模型组增加,但仍低于假手术组,差异有显著性意义(P<0.05);④与模型组相比,治疗组大鼠岛叶、扣带皮质、丘脑BCL-2 mRNA及蛋白表达均升高,BAX mRNA及蛋白表达均下降,BCL-2/BAX比值均增加,差异有显著性意义(P<0.05);⑤结果表明:中药复方利咽启闭方可以改善脑卒中吞咽障碍大鼠的吞咽次数及吞咽启动反应时间以及24 h进食进水量、体质量等吞咽功能相关指标,其作用机制可能是通过改善脑缺血面积,抑制大鼠岛叶、扣带皮质、丘脑的神经细胞凋亡,进而改善高级中枢对延髓吞咽中枢的调控,以及调节孤束核内的神经递质5-羟色胺水平来实现的。

华蟾素对肝癌患者介入术后外周血Bcl-2和cyclinD1蛋白表达水平的影响

目的观察华蟾素对肝癌患者介入术后外周血Bcl-2和细胞周期蛋白(cyclinD1)表达水平的影响。方法本次研究对象在2020年5月—2021年5月于医院进行介入术治疗的肝癌患者中选择100例,随机分为两组,50例患者给予患者常规介入治疗(常规介入组),50例患者在常规化疗的基础上加用华蟾素治疗(华蟾素组)。检测患者的Bax、Bcl-2、cyclinD1水平及肝功能指标[甲胎蛋白(AFP)、谷丙转氨酶(ALT)、总胆红素(TBIL)、谷草转氨酶(AST)]、免疫功能指标[免疫球蛋白G(IgG)、自然杀伤(NK)细胞、T淋巴细胞亚群(CD_(4)^(+)、CD_(4)^(+)/CD_(8)^(+))],比较两组卡氏(KPS)评分、肝功能分级标准(Child-Pugh)评分,评价疗效,观察两组不良反应发生情况。结果华蟾素组患者治疗后的Bax水平高于常规介入组(P<0.05),Bcl-2、cyclinD1水平低于常规介入组(P<0.05);华蟾素组患者治疗后的AFP、TBIL、AST水平低于常规介入组(P<0.05),ALT水平高于常规介入组(P<0.05);华蟾素组患者治疗后的IgG、NK细胞、CD_(4)^(+)水平高于常规介入组(P<0.05),CD_(4)^(+)/CD_(8)^(+)水平低于常规介入组(P<0.05);华蟾素组患者治疗后的KPS评分高于常规介入组(P<0.05),Child-Pugh评分低于常规介入组(P<0.05);华蟾素组患者治疗有效率为92.00%,高于常规介入组的74.00%(P<0.05);华蟾素组患者的不良反应发生率为20.00%,低于常规介入组的44.00%(P<0.05)。结论华蟾素可以下调肝癌患者介入术后外周血Bcl-2和cyclinD1蛋白表达水平,上调Bax水平,促进肿瘤细胞凋亡;同时可以增强患者的肝功能和免疫功能,提高生活质量,改善预后;还能提高肝癌介入治疗疗效,降低发生不良反应的风险。

腺苷脱氨酶2缺乏症临床特征与基因型分析

目的总结3例腺苷脱氨酶2(ADA 2)缺乏症患儿的临床特征及基因型特点,提高对该病的认识。方法回顾性分析3例ADA2缺乏症患儿的临床特点并利用全外显子测序进行遗传学分析。利用试剂盒测定患儿血浆中ADA2酶的活性。总结该病的临床及基因型特征。结果本组3例患儿均存在ADA2基因变异,例1以反复发热、皮疹、惊厥为主要临床表现,合并脑卒中,伴炎症指标明显升高,ADA2基因存在复合杂合变异:c.139G>T和c.484T>C突变。例2以反复发热、皮疹为主要临床表现,病程中合并消化道穿孔、脑卒中,炎症指标明显升高。WES检测发现ADA2基因存在c.916C>T及c.1069G>A复合杂合突变。例3以反复发热、咳嗽为主要临床表现,合并心肌炎,伴免疫功能明显下降;WES检测发现患者ADA2基因存在c.849T>G纯合突变。血浆ADA2酶活性测定发现例1和2酶活性显著降低。结论ADA2缺乏症国内罕见,临床特征多变,掌握其临床特征及基因特点,有助于提高诊断水平。

鉴别猪圆环病毒2型和3型双重TaqMan MGB探针FQ-PCR检测方法研究

建立一种快速、特异鉴别检测猪圆环病毒2型(PCV2)和猪圆环病毒3型(PCV3)的双重TaqMan MGB探针FQ-PCR方法,本研究以PCV2的Rep蛋白和PCV3的Cap蛋白基因作为靶基因,各设计1对特异性引物和1条TaqMan MGB探针,经优化各反应条件和进行敏感性、特异性、重复性和干扰性试验,建立鉴别检测PCV2/PCV3的双重FQ-PCR方法。结果显示:该方法可特异性扩增PCV2、PCV3核酸,与猪伪狂犬病病毒(PRV)等8种病原及阴性对照无交叉反应,特异性较强;对PCV2和PCV3阳性质粒标准品的最低检出限均可达10 copies/μL,敏感性较高;PCV2/PCV3批内/批间重复试验变异系数(CV)值均在3%以下,表明方法稳定性、重复性较好;干扰性试验表明在两种病毒阳性质粒起始模板相差较大时该方法不会影响对其中任一病毒核酸的检出和准确定量。对42份临床疑似PCV感染样品检测结果与PCV2、PCV3基因测序结果符合率100%。本研究建立的双重FQ-PCR方法具有敏感性高达10 copies/μL、特异性强、在同一反应体系中能同时快速鉴别检测PCV2、PCV3等优点,可用于临床PCV2/PCV3感染的快速鉴别检测。

基于Caspase-3/Bcl-2/Bax信号通路探究加味旋覆代赭汤治疗食管癌前病变的作用机制

目的:探究加味旋覆代赭汤对食管癌前病变大鼠Caspase-3/Bcl-2/Bax信号通路的调控作用机制。方法:将48只雄性SD大鼠随机分为4组,空白组、模型组、中药组、西药组,每组各12只。除空白组外均采用复合造模法制作食管癌前病变大鼠模型,造模成功后,分别进行药物灌胃干预,空白组、模型组用生理盐水灌胃,中药组和西药组分别给予加味旋覆代赭汤、西药(雷贝拉唑+莫沙必利)灌胃,给药8周取材。利用光学显微镜观察食管上皮组织的形态学变化;分别应用蛋白质印迹法(Western-blot)及聚合酶链式反应(PCR)检测食管上皮组织Caspase-3、Bcl-2及Bax的表达水平。结果:与空白组比较,模型组大鼠食管上皮病理积分升高(P<0.01);与模型组比较,中药组、西药组大鼠食管上皮病理积分均降低(P<0.01)。PCR及Western-blot检测结果显示,与空白组比较,模型组大鼠Caspase-3、Bax mRNA、蛋白表达均降低(P<0.01);与模型组比较,中药、西药组大鼠Caspase-3、Bax mRNA、蛋白表达均增高(P<0.05)。与空白组比较,模型组大鼠食管组织中Bcl-2 m RNA及蛋白表达水平均升高(P<0.05);与模型组比较,中药组和西药组Bcl-2 mRNA及蛋白表达水平均降低(P<0.05)。结论:加味旋覆代赭汤可能通过下调Bcl-2/Bax比值,增加线粒体外膜通透性,释放凋亡因子,激活Caspase-3,使病变组织发生凋亡,扭转食管上皮异型增生,从而起到治疗食管癌前病变的作用。

白藜芦醇在小鼠溃疡性结肠炎相关结直肠癌中发挥的作用

目的 探讨白藜芦醇在小鼠溃疡性结肠炎相关结直肠癌中发挥的作用和可能的分子机制。方法 将30只雄性C57BL/6小鼠随机分为对照组和观察组两组,每组各15只。用氧化偶氮甲烷/葡聚糖硫酸钠(AOM/DSS)建立小鼠UC结肠癌模型。观察组小鼠通过管饲法接受150 mg/kg白藜芦醇,1次/d。对照组同步用等量的无菌生理盐水灌胃。第71天处死小鼠,观察两组小鼠结肠组织病理形态,分析比较两组小鼠结肠组织中长非编码RNA H19(lncRNA H19)、Bcl-2、生存素(Survivin)和信号传导转录激活因子3(STAT3)mRNA的表达情况。结果 观察组小鼠结肠组织中lncRNA H19、Bcl-2、Survivin和STAT3 mRNA表达水平低于对照组,差异有统计学意义(P<0.05)。观察组小鼠结肠组织中Survivin和pSTAT3蛋白表达水平低于对照组,且差异有统计学意义(P<0.05)。结论 在CAC小鼠发病过程中,白藜芦醇可以抑制UC小鼠肿瘤的生成,其作用机制可能与抑制Bcl-2、Survivin和STAT3的表达有关。