Cloning and Prokaryotic Expression of FnBP Ligand Binding Gene of Staphylococcus aureus

[Objective] The study aimed to clone the FnBP ligand binding gene of Staphylococcus aureus and run prokaryotic expression by constructing a prokaryotic expression vector. [Method] The gene encoding FnBP ligand binding gene was amplified from S.aureus chromosomal DNA by PCR technique. After T-A cloning, plasmid pMD18- FnBP was constructed. pMD18- FnBP and pET28a(+)were digested by BamH Ⅰ and EcoR Ⅰ double enzymes, then the purified FnBP ligand binding gene was subcloned into the expression vector pET28a(+), and the prokaryotic expression vector pET28a-FnBP was thus constructed. The constructed plasmid pET28a-FnBP was transformed into Escherichia coli BL21(DE3) competent cells. The bacterium was induced by IPTG and the expressed products were analyzed by SDS-PAGE and Western blot. [Result] The gene fragment with the length of 370 bp was amplified by PCR approach. One approximately 30 kD exogenous protein was observed in SDS-PAGE analysis. Western blot analysis indicates the protein has antigenicity of S.aureus. [Conclusion] The FnBP ligand binding gene of S.aureus was successfully cloned and expressed in prokaryotic cells.

In situ detection of tumor infiltrating lymphocytes expressing perforin and fas-ligand genes in human HCC

AIM To investigate the expression of perforin and fas ligand (fas L) of tumor infiltrating lymphocytes (TILs) in human hepatocellular carcinoma (HCC). METHODS By in situ hybridization and immunohistochemistry, the perforin and fas L gene expression of TILs was studied in 20 HCC cases. RESULTS Positive expression of perforin and fas L genes was detected in 16 HCC cases. One patient had expression of perforin and fas L genes in the majority of TILs and survived 1 5 years after tumor resection without HCC relapse. This seems that the presence of a large number of activated T cells might be beneficial for the antitumor immunity. In other cases, less than 10% of TILs were able to express perforin and fas L genes. CONCLUSION Although there were a number of T cells in HCC, only few of them were immunoactive and able to kill tumor cells. It seems important to promote further proliferation of these activated T cells in vitro or in vivo .

Association of gene and protein expression and genetic polymorphism of CC chemokine ligand 4 in colorectal cancer

BACKGROUND Leukocytes,such as T cells and macrophages,play an important role in tumorigenesis.CC chemokine ligand(CCL)4,which is produced by lymphocytes and macrophages,has been found to be expressed in the mucosa of the gastrointestinal tract and is a potent chemoattractant for various leukocytes.AIM To examine CCL4 expression and its genetic polymorphism rs10491121 in patients with colorectal cancer(CRC)and evaluate their prognostic significance.METHODS Luminex technology was used to determine CCL4 Levels in CRC tissue(n=98),compared with paired normal tissue,and in plasma from patients with CRC(n=103),compared with healthy controls(n=97).Included patients had undergone surgical resection for primary colorectal adenocarcinomas between 1996 and 2019 at the Department of Surgery,Ryhov County Hospital,Jönköping,Sweden.Reverse transcription quantitative PCR was used to investigate the CCL4 gene expression in CRC tissue(n=101).Paired normal tissue and TaqMan single nucleotide polymorphism assays were used for the CCL4 rs10491121 polymorphism in 610 CRC patients and 409 healthy controls.RESULTS The CCL4 protein and messenger RNA expression levels were higher in CRC tissue than in normal paired tissue(90%,P<0.001 and 45%,P<0.05,respectively).CRC tissue from patients with localized disease had 2.8-fold higher protein expression levels than that from patients with disseminated disease.Low CCL4 protein expression levels in CRC tissue were associated with a 30%lower cancer-specific survival rate in patients(P<0.01).The level of plasma CCL4 was 11%higher in CRC patients than in healthy controls(P<0.05)and was positively correlated(r=0.56,P<0.01)with the CCL4 protein level in CRC tissue.The analysis of CCL4 gene polymorphism rs10491121 showed a difference(P<0.05)between localized disease and disseminated disease in the right colon,with a dominance of allele A in localized disease.Moreover,the rate of the A allele was higher among CRC patients with mucinous cancer than among those with nonmucinous cancer.CONCLUSION The present study indicates that the CRC tissue levels of CCL4 and CCL4 gene polymorphism rs10491121,particularly in the right colon,are associated with clinical outcome in CRC patients.

What is new in the pathogenesis and treatment of IgA glomerulonephritis

Recently,new findings have been clarified concerning both pathogenesis and treatment of IgA nephritis.The four hits theory has been confirmed but several genetic wide association studies have allowed finding several genes connected with the pathogenesis of the disease.All these new genes apply to each of the four hits.Additionally,new discoveries concerning the microbiota and its connection with immune system and IgA generation have allowed finding out the role of the mucosa in IgA nephropathy pathogenesis.The IgA treatment is also changed included the future possibilities.The treatment of the chronic kidney disease,associated with the nephropathy,is mandatory,since the beginning of the disease.The classical immunosuppressive agents have poor effect.The corticosteroids remain an important cornerstone in any phase of the disease.More effect is related to the treatment of B cells and plasma cells.In particular,in very recent studies have been documented the efficacy of anti B cell-activating factor and anti A proliferation-inducing ligand agents.Most of these studies are to date in phase II/III.Finally,new agents targeting complement are arising.These agents also are still in randomized trials and act principally in hit 4 where the immunocomplexes in the mesangium activate the different pathways of the complement cascade.

Functional expression of a proliferation-related ligand in hepatocellular carcinoma and its implications for neovascularization

AIM： To detect the expression of a proliferation-related ligand on human hepatocellular carcinoma （HCC） cell lines （SK-Hepl, HLE and HepG2） and in culture medium. METHODS： APRIL expression was analyzed by Western blotting in HCC cell lines. Effects of APRIL to cell count and angiogenesis were analyzed, too. RESULTS： Recombinant human APRIL （rhAPRIL） increased cell viability of HepG2 cells and, in HUVEC, rhAPRIL provided slight tolerance to cell death from serum starvation. Soluble APRIL （sAPRIL） from HLE cells increased after serum starvation, but did not change in SK-Hepl or HepG2 cells. These cells showed down-regulation of VEGF after incubation with anti-APRIL antibody. Furthermore, culture medium from the HCC cells treated with anti-APRIL antibody treatment inhibited tube formation of HUVECs. CONCLUSION： Functional expression of APRIL might contribute to neovascularization via an upregulation of VEGF in HCC.

Anticancer actions of PPARγ ligands:Current state and future perspectives in human lung cancer

Peroxisome proliferator-activated receptors(PPARs) are ligand-dependent nuclear transcription factors and members of the nuclear receptor superfamily.Of the three PPARs identified to date(PPARγ,PPARβ/δ,and PPARα),PPARγ has been studied the most,in part because of the availability of PPARγagonists(also known as PPARγ ligands)and its significant effects on the management of several human diseases including type 2 diabetes,metabolic syndrome,cardiovascular disease and cancers.PPARγ is expressed in many tumors including lung cancer,and its function has been linked to the process of lung cancer development, progression and metastasis.Studies performed in gynogenic and xenograft models of lung cancer showed decreased tumor growth and metastasis in animals treated with PPARγ ligands.Furthermore,data are emerging from retrospective clinical studies that suggest a protective role for PPARγ ligands on the incidence of lung cancer.This review summarizes the research being conducted in this area and focuses on the mechanisms and potential therapeutic effects of PPARγ ligands as a novel anti-lung cancer treatment strategy.

Synthesis of a novel multivalent galactoside with high hepatocyte targeting for gene delivery

A novel bifunctional glycolipid which carded a cluster of thiogalactosides as the hepatocyte targeting ligand for gene delivery was prepared. Hexa-antennary alcohol 1 was used as the core scaffold to attach a cholesterol molecule by a poly（ethylene glycol） chain, while its remaining branches were linked with five acetylgalactosides, which would be deacetylated later to produce pentaantennary galactoside. Liposome containing the galactoside showed high affinity and transfection activity in hepatoma cells HepG2.

Genetic polymorphisms predict response to anti-tumor necrosis factor treatment in Crohn's disease

To investigate genetic factors that might help define which Crohn’s disease (CD) patients are likely to benefit from anti-tumor necrosis factor (TNF) therapy. METHODSThis was a prospective cohort study. Patients were recruited from a university digestive disease practice database. We included CD patients who received anti-TNF therapy, had available medical records (with information on treatment duration and efficacy) and who consented to participation. Patients with allergic reactions were excluded. Patients were grouped as ever-responders or non-responders. Genomic DNA was extracted from peripheral blood, and 7 single nucleotide polymorphisms (SNPs) were assessed. The main outcome measure (following exposure to the drug) was response to therapy. The patient genotypes were assessed as the predictors of outcome. Possible confounders and effect modifiers included age, gender, race, and socioeconomic status disease, as well as disease characteristics (such as Montreal criteria). RESULTS121 patients were included. Twenty-one were non-responders, and 100 were ever-responders. Fas ligand SNP (rs763110) genotype frequencies, TNF gene -308 SNP (rs1800629) genotype frequencies, and their combination, were significantly different between groups on multivariable analysis controlling for Montreal disease behavior and perianal disease. The odds of a patient with a Fas ligand CC genotype being a non-responder were four-fold higher as compared to a TC or TT genotype (P = 0.009, OR = 4.30, 95%CI: 1.45-12.80). The presence of the A (minor) TNF gene -308 allele correlated with three-fold higher odds of being a non-responder (P = 0.049, OR = 2.88, 95%CI: 1.01-8.22). Patients with the combination of the Fas ligand CC genotype and the TNF -308 A allele had nearly five-fold higher odds of being a non-responder (P = 0.015, OR = 4.76, 95%CI: 1.35-16.77). No difference was seen for the remaining SNPs. CONCLUSIONThe Fas-ligand SNP and TNF gene -308 SNP are associated with anti-TNF treatment response in CD and may help select patients likely to benefit from therapy.

The effect of FasL gene transfer to islet cells on pancreatic islet allografts

OBJECTIVE: To investigate the effect of FasL gene transfer to islet cells on pancreatic islet allografts. METHODS: A recombinant and replication-deficient type-5 adenovirus encoding murine FasL (AdV- FasL) was constructed by the method of calcium phosphate precipitation. Pancreatic islets were infected with the recombinant adenovirus AdV-FasL, and transplanted into diabetic recipients. FasL expression was detected by RT-PCR and immunohistochemistry. The survival of allografts and the apoptosis of gene transferred islet allografts were analyzed. RESULTS: All animals receiving islet allograft alone returned to a diabetic state by several days (mean survival time 6.3±0.6 days). Compared with the control group, no delayed rejection and prolonged survival of allografts were observed in the group of FasL gene transfer. The rejection was accelerated and the allograft survival was shortened to 3.4±0.2 days (P<0.05). Pancreatic islets infected with AdV- FasL demonstrated positive staining of FasL at 24 h, with an increased intensity at 48 h, but not in AdV-5 infected or uninfected islets. TUNEL labeling of pancreatic islet allografts at 24, 48 h revealed apoptosis that was not in AdV-5 infected allografts. CONCLUSIONS: Though co-transplantation of FasL-expressing testicular cells can induce privilege of islet allografts and prolong allograft survival, direct expression of FasL on islet allografts infected with AdV-FasL may accelerate islets rejection by islet apoptosis and granulocyte infiltration.

Bovine Endometrial Cells Mount Innate Immune Response to the Intracellular Ligands CL097 and Poly(dA:dT) Indicating Roles against Uterine Viruses

Uterine infection and endometritis cause infertility and economic losses in the cattle industry. The innate immune response of the endometrium is critical in the elimination of pathogenic organisms that invade the uterus in postpartum cows. This study investigated the response of bovine endometrium to synthetic intracellular ligands which activate innate immunity by stimulating similar receptors to those used to recognise the presence of some viruses. Mixed primary epithelial and stromal cell cultures were treated with 5 μg/ml of CL097 (a TLR7/8 ligand) or 2 μg/ml of poly(dA:dT) (a DNA analogue) for either 6 h or 24 h. Cellular responses were assessed by the mRNA expression of 18 immune-related genes and 3 endogenous reference genes by conventional PCR followed by qRT-PCR from four replicate experiments. Bovine endometrial cells expressed the cytosolic pattern recognition receptors (PRRs) DDX58 (RIG-I), IFIH1 (MDA5) and LRRFIP1 which act as intracellular nucleic acid sensors. Neither ligand altered the expression of the extra-cytosolic pattern recognition receptors (PRRs) TLR3, TLR4, TLR7 or TLR8 whereas poly(dA:dT) treatment increased the expression of IFIH1 and DDX58. Treated cells also responded to CL097 or poly(dA:dT) with a differential up-regulation of genes involved in innate immune response including type I interferon/antiviral response (MX1, IFNAR1), antimicrobial activity (MUC1, SLPI) and cytokine activity (TNF, IL1B, IL8). Bovine endometrial cells therefore express both cytosolic and extra-cytosolic intracellular PRRs and are able to mount an innate immune response upon stimulation with intracellular ligands. This suggests an important role for these cells in the defence against viruses that may be present in the uterus in postpartum cows.

Radioprotective effects of the expression of FLT3 ligand regulated by Egr-1 regulated element on radiation injury of SCID mice

Objective: In order to explore the radioprotective effects of the expression of hematopoietic growth factors regulated by radio-inducible promoter on radiation injury. Methods:The human FL (Flt3 ligand) cDNA and EGFP (enhanced green fluorescent protein) cDNA were linked together with IRES and then inserted into the eukaryotic expression vector pCI-Egr, which was constructed by substituting CMV promoter in pCIneo with the Egr-1 promoter (Egr-EF). The vector was transferred into human bone marrow stromal ...

乳腺癌患者病理特征与Bcl-2、CXCL13、PAX8表达情况的关系分析

目的分析乳腺癌患者病理特征与B细胞淋巴瘤/白血病-2基因(Bcl-2)、趋化因子配体13(CXCL13)、配对盒基因8抗体(PAX8)表达情况的关系。方法收集2021年1月至2023年1月该院收治的160例乳腺癌患者临床资料。采用免疫组化法对其癌组织与癌旁组织Bcl-2、CXCL13、PAX8表达情况进行检测,并分析3项指标与患者病理特征的关系。结果与癌旁组织比较,癌组织Bcl-2、CXCL13、PAX8阳性率更高,差异有统计学意义(P<0.05)。与雌激素受体(ER)阴性、肿瘤最大径≥3 cm、孕激素受体(PR)阴性患者比较,ER阳性、肿瘤最大径<3 cm、PR阳性患者中Bcl-2高表达占比更高,差异有统计学意义(P<0.05);与无淋巴结转移、Ⅰ~Ⅱ期患者比较,淋巴结转移、Ⅲ~Ⅳ期患者中CXCL13高表达占比更高,差异有统计学意义(P<0.05);与Ⅰ~Ⅱ期、高/中分化、无淋巴结转移患者比较,Ⅲ~Ⅳ期、低分化、有淋巴结转移患者中PAX8高表达占比更高,差异有统计学意义(P<0.05)。ER、PR表达情况与Bcl-2表达情况呈正相关(P<0.05),肿瘤最大径与Bcl-2表达情况呈负相关(P<0.05);临床分期、淋巴结转移情况与CXCL13、PAX8表达情况呈正相关(P<0.05);分化程度与PAX8表达情况呈负相关(P<0.05)。结论乳腺癌患者Bcl-2、CXCL13、PAX8表达情况对疾病的发生和发展具有明显影响,有望成为评估乳腺癌患者病情严重程度的标志物。

泛癌分析揭示SREK1在低级别胶质瘤中促进CD274表达

目的剪接调节谷氨酸和富赖氨酸的蛋白质1(SREK1)在多种肿瘤中的泛癌分析,揭示SREK1在泛癌中的作用。方法利用在线数据库GEPIA 2、TIMER 2.0、TISIDB和cBioPortal分析SREK1表达对肿瘤患者预后的影响、在低级别胶质瘤(LGG)肿瘤组织中的表达、遗传变异的特征及其表达对肿瘤组织中免疫细胞的浸润和免疫—肿瘤靶基因的相关性分析。结果LGG肿瘤组织中,SREK1表达与记忆B细胞、活化的CD4+T细胞、Th2细胞、中性粒细胞、NKT细胞以及单核细胞和CD56dimNK细胞的浸润存在相关性(P均<0.05)。SREK1与免疫—肿瘤靶基因如信号传导及转录激活蛋白3(STAT3)、Ⅰ型干扰素受体1(IFNAR1)、核受体亚家族3C组成员1(NR3C1)和表皮生长因子受体(EGFR)、表面抗原分化簇274(CD274)等表达在LGG中均呈正相关(P均<0.05)。结论SREK1是LGG患者的危险因子之一,可能通过促进CD274的表达来加剧LGG的进展。

卵巢子宫内膜异位囊肿患者血清APRIL与NDRG1的水平表达及其临床价值研究

目的观察血清增殖诱导配体(a proliferation inducing ligand,APRIL),N-myc下游调节基因1(N-myc downstream regulated gene 1,NDRG1)水平变化,并分析其对卵巢子宫内膜异位囊肿(ovarian endometriomas,OEM)的诊断价值。方法选取2021年7月~2022年7月在自贡市第一人民医院就诊的132例OEM患者作为观察组,并进行定期随访,根据患者预后病情有无复发分为复发组(n=50)和未复发组(n=82)。同期在该院体检的健康者78例为对照组。采用酶联免疫吸附法(enzyme linked immunosorbent assay,ELISA)检测血清中APRIL和NDRG1水平;并对复发组和未复发组的一般资料进行比较;采用Logistic回归分析影响OEM预后的相关因素;用Pearson法分析OEM患者血清APRIL与NDRG1表达相关性;绘制受试者工作特征(receiver operating characteristic,ROC)曲线分析血清APRIL和NDRG1对OEM的诊断价值。结果与对照组相比,APRIL水平(35.28±6.81ng/ml vs 26.37±3.19ng/ml)和NDRG1水平(124.39±15.67μg/L vs 9.67±10.82μg/L)升高,差异具有统计学意义(t=10.864,17.278,均P<0.05)。与未复发组比较,复发组血清APRIL(40.38±7.88ng/ml vs 32.16±6.18ng/ml)和NDRG1(132.04±19.83μg/L vs 119.73±13.16μg/L)水平升高,差异具有统计学意义(t=6.668,4.287,均P<0.05)。Logistic回归分析显示,血清APRIL和NDRG1水平是影响OEM患者预后的危险因素(Waldχ^(2)=11.839,28.437,均P<0.001)。Pearson法分析结果显示,OEM患者血清APRIL水平与NDRG1水平呈正相关(r=0.439,P<0.001)。血清APRIL,NDRG1水平联合诊断OEM的曲线下面积(AUC)为0.849,灵敏度和特异度分别为73.95%,85.37%,优于APRIL和NDRG1单独预测(Z=2.644,2.094,P=0.008,0.036)。结论子宫内膜异位囊肿患者血清APRIL和NDRG1水平升高,二者联合对子宫内膜异位囊肿诊断具有较高的临床价值,且与子宫内膜异位囊肿患者的预后密切相关。

卵巢癌中基因损伤和PD-L1表达之间的关系研究

目的本研究拟证明卵巢癌细胞基因修复功能损伤的程度和程序性死亡配体-1(Programmed death ligand-1,PD-L1)之间的关系,为PD-L1治疗卵巢癌提供依据。方法采用卵巢癌组织芯片(tissue microarray,TMA)样本,非小细胞肺癌TMA为对照。采用辅助损伤修复检测(repair assisted damage detection,RADD)法和改良的RADD法检测DNA损伤及修复功能缺陷水平。应用免疫组化方法观察卵巢肿瘤细胞中DNA损伤和PD-L1蛋白表达,采用激光共聚焦显微镜对TMAs内的每个组织核芯进行成像并行图像采集。记录每个核芯的荧光强度,绘制图像并计算二者的相关性。结果RADD法和改良RADD法都能有效的检测出肿瘤组织中的DNA损伤水平,其中改良的RADD(mRADD)法检出水平更高。卵巢肿瘤中DNA氧化损伤的发生率很高。随着DNA氧化损伤水平增加,PD-L1在肿瘤中的表达也随之增加。与正常组织相比,高级别浆液性腺癌和子宫内膜样腺癌的DNA损伤水平差异最明显。而且PD-L1表达和DNA损伤水平有很好的相关性。相关性分析发现,采用改良RADD法检测高级别浆液性癌和子宫内膜样腺癌的DNA损伤水平与PD-L1之间都具有良好的相关性。卵巢粘液性腺癌中的DNA损伤水平与PD-L1表达的相关性最高。结论卵巢癌DNA氧化损伤或其与PD-L1协同表达关系可能是改善PD-L1阻断治疗有效性分类筛选中的一个潜在生物标志物。

宫颈癌与TRAIL基因多态性及其肿瘤标志物的相关性研究

目的探讨TRAIL基因多态性及其血清水平与宫颈癌发生及肿瘤标志物的相关性。方法收集宫颈癌患者92例为宫颈癌组,健康者90例为对照组,提取两组全血基因组DNA,用PCR-RFLP和测序法分析TRAIL基因第5外显子3′-UTR 1525G/A、1588G/A、1595C/T基因多态性;用ELISA法检测血清sTARIL水平。结果两组1525G/A、1588G/A、1595C/T基因型分布有统计学意义(P<0.05);宫颈癌组1525G、1588G、1595C等位基因频率明显高于对照组(P<0.05),血清sTRAIL水平明显低于对照组(P<0.05),血清sTRAIL水平与血清CEA、CA125、SCC水平没有相关性。结论宫颈癌存在TRAIL易感基因,其血清TRAIL水平降低。

肺部感染并发脓毒症患者血清PD-L1、LAG-3与炎症因子的表达及临床意义

目的 探讨肺部感染并发脓毒症患者血清中程序性死亡受体配体1(PD-L1)、淋巴细胞激活基因3(LAG-3)与炎症因子的表达水平及临床意义。方法 回顾性选取2021年6月~2023年7月洪湖市中医医院收治的96例肺部感染并发脓毒症患者为观察组,根据其预后生存情况分为生存组68例、死亡组28例,以同期体检的110名健康人员为健康对照组。观察两组受检者在入院第1、3、5和7天查血清PD-L1、LAG-3,白细胞介素(IL)-6、IL-8、IL-10、降钙素原(PCT)、C反应蛋白(CRP)等炎症因子水平,并使用急性生理学、慢性健康状况Ⅱ(APACHEⅡ)评分和序贯性器官功能衰竭(SOFA)评分对各组肺部感染并发脓毒症患者进行评分;肺部感染并发脓毒症患者的PD-L1、LAG-3和炎症因子与APACHEⅡ、SOFA评分的相关性采用Spearman法进行分析;影响肺部感染并发脓毒症患者预后的因素使用logistic回归曲线进行分析;血清PD-L1、LAG-3与炎症因子对肺部感染并发脓毒症患者预后预测价值采用受试者工作特征(ROC)曲线进行分析。结果 观察组血清PD-L1、LAG-3与IL-6、IL-8、PCT、CRP等炎症因子水平和APACHEⅡ、SOFA评分均显著高于健康对照组,差异有统计学意义(t=18.878、31.675、47.256、17.007、36.931、46.249、25.472、35.589,P<0.05);肺部感染并发脓毒症患者血清PD-L1、IL-6、IL-8、CRP水平和APACHEⅡ、SOFA评分在入院第3天开始上升,第5天降低,在入院第7天时与第1天差异有显著性统计学意义(F=45.102、291.957、38.741、51.782、23.215、100.872,P<0.05)。观察组患者血清PD-L1、LAG-3、IL-6、IL-8、IL-10、PCT、CRP水平与APACHEⅡ、SOFA评分均呈正相关(r=0.557、0.316、0.428、0.501、0.168、0.382、0.517,0.383、0.531、0.405、0.392、0.344、0.582、0.446,P<0.05)。生存组患者血清PD-L1、IL-6、IL-8、PCT、CRP水平和APACHEⅡ、SOFA评均显著低于死亡组(t=5.234、7.944、9.405、34.105、4.625、5.806、3.745,P<0.05)。PD-L1、IL-8、CRP水平和APACHEⅡ和SOFA评分是肺部感染并发脓毒症患者预后的独立危险因素(OR=2.017、2.058、0.319、2.331、2.252,P<0.05)。PD-L1、IL-8、CRP三者联合预测(0.987)高于单独预测(0.882、0.897、0.874),具有更高的预测价值。结论 肺部感染并发脓毒症患者血清PD-L1、LAG-3和IL-6、IL-8、PCT、CRP等炎症因子均高表达,与APACHEⅡ、SOFA评分具有正相关性,PD-L1、IL-8、CRP三者联合对肺部感染并发脓毒症患者预后具有更高预测价值。

稳定型冠心病患者血清SAA、sST2、sCD40L变化及其对不良心血管事件的预测价值

目的分析稳定型冠心病(SCAD)患者血清淀粉样蛋白A(SAA)、可溶性生长刺激表达基因2蛋白(sST2)、可溶性白细胞分化抗原40配体(sCD40L)变化,探讨其对不良心血管事件的预测价值。方法选取2020年1月至2023年6月西安凤城医院收治的284例SCAD患者作为研究对象,根据Gensini积分将患者分为轻度组(Gensini评分≤26分,n=93)、中度组(Gensini评分27~40分,n=158)、重度组(Gensini评分>40分,n=33),比较三组血清SAA、sST2、sCD40L水平,并分析血清SAA、sST2、sCD40L对主要不良心血管事件(MACE)的预测价值。结果血清SAA、sST2、sCD40L水平:重度组>中度组>轻度组(P<0.05);MACE组血清SAA、sST2、sCD40L水平高于非MACE组(P<0.05);Logistic回归分析显示,患有糖尿病、低密度脂蛋白胆固醇(LDL)升高、SAA升高、sST2升高、sCD40L升高均为影响SCAD患者发生MACE的独立危险因素(P<0.05);ROC曲线分析显示,血清SAA、sST2、sCD40L联合预测SCAD患者MACE的AUC为0.837,高于三指标单独检测(P<0.05)。结论SCAD患者血清SAA、sST2、sCD40L水平与冠脉病变程度相关,三者对MACE的预测价值较高,可作为临床预测预后的潜在途径。

长期使用地西泮对神经活性配体受体相互作用信号通路的影响

研究长期使用地西泮对小鼠神经活性配体受体相互作用信号通路的影响。通过长期且逐量递增的方式给小鼠连续灌胃地西泮60 d,提取小鼠全脑总mRNA,进行小鼠全基因组芯片检测,运用生物信息学方法筛选出差异表达基因,并通过《京都基因与基因组百科全书》(KEGG)的基因功能通路数据库分析神经活性配体受体相互作用信号通路的变化。结果发现,与正常组比较,地西泮组的神经活性配体受体相互作用信号通路上的16个基因表达发生了显著性变化,其中表达上调的基因有9个,表达下调的有7个。实验结果表明,长期使用地西泮对神经活性配体受体相互作用信号通路具有显著的影响,可能和长期使用地西泮导致机体所产生的不良反应密切相关。