Micro RNA-133a(mi RNA-133a) and cardiac troponin I(c Tn I) are different-type crucial biomarkers of acute myocardial infarction(AMI), whose levels are great significance for AMI diagnosis and treatment. Herein,a novel...Micro RNA-133a(mi RNA-133a) and cardiac troponin I(c Tn I) are different-type crucial biomarkers of acute myocardial infarction(AMI), whose levels are great significance for AMI diagnosis and treatment. Herein,a novel photoelectrochemical-electrochemical(PEC-EC) dual-mode biosensing platform for dual-target assays of mi RNA-133a and c Tn I was developed. In which, a PEC-EC dual-mode sensing platform for mi RNA-133a was constructed based on the changes of the photocurrent inhibition effect and the electrochemical signal of Fc on the Fc-hairpin DNA probe(Fc-HP)/Zn Cd S-quantum dots(QDs)/ITO electrode. Furthermore, under magnetic separation and the specific interaction between c Tn I and its aptamer, the N-doped porous carbon-Zn O polyhedra(NPC-Zn O)-hemin-capture DNA probe hybrid(NH-CP) was obtained and introduced to the Fc-HP/Zn Cd S-QDs/ITO electrode via hybridization between NH-CP and Fc-HP. The hemin molecules encapsulated in NH-CP could effectively induce the photocurrent-polarity-switching of the FcHP/Zn Cd S-QDs/ITO electrode and generate a new electrochemical signal originating from hemin. Thus,c Tn I was assayed sensitively and selectively by the PEC-EC dual-mode biosensing platform. Here, Fc and hemin not only serve as the electrochemical indicators, but also respectively inhibit the photocurrent and switch the photocurrent polarity of Zn Cd S-QDs. Furthermore, the proposed biosensing platform could be easily expanded to the detection of other multiplex-type biomarkers via the change of the sequences of the related DNA probes, implying its significant potential in clinical diagnosis and biological analysis.展开更多
AIM To investigate the role of the miR-133a-UCP2 pathway in the pathogenesis of inflammatory bowel disease (IBD) and to explore the potential downstream mechanisms with respect to inflammation, oxidative stress and en...AIM To investigate the role of the miR-133a-UCP2 pathway in the pathogenesis of inflammatory bowel disease (IBD) and to explore the potential downstream mechanisms with respect to inflammation, oxidative stress and energy metabolism. METHODS C57BL/6 mice were fed dextran sulfate sodium (DSS) liquid for 7 consecutive days, followed by the administration of saline to the DSS group, UCP2 siRNA to the UCP2 group and a miR-133a mimic to the miR-133a group on days 8 and 11. Body weight, stool consistency and rectal bleeding were recorded daily, and these composed the disease activity index (DAI) score for the assessment of disease severity. After cervical dislocation was performed on day 14, the length of the colon in each mouse was measured, and colonic tissue was collected for further study, which included the following: haematoxylin and eosin staining, UCP2 and miR-133a detection by immunohistochemical staining, western blot and quantitative real-time PCR, measurement of apoptosis by TUNEL assay, and the assessment of inflammation (TNF-alpha, IL-1 beta, IL-6 and MCP1), oxidative stress (H2O2 and MDA) and metabolic parameters (ATP) by ELISA and colorimetric methods. RESULTS An animal model of IBD was successfully established, as shown by an increased DAI score, shortened colon length and specific pathologic changes, along with significantly increased UCP2 and decreased miR-133a levels. Compared with the DSS group, the severity of IBD was alleviated in the UCP2 and the miR-133a groups after successful UCP2 knockdown and miR-133a overexpression. The extent of apoptosis, as well as the levels of TNF-alpha, IL-1 beta, MDA and ATP, were significantly increased in both the UCP2 and miR-133a groups compared with the DSS group. CONCLUSION The miR-133a-UCP2 pathway participates in IBD by altering downstream inflammation, oxidative stress and markers of energy metabolism, which provides novel clues and potential therapeutic targets for IBD.展开更多
目的探究脊柱骨折并发脊髓损伤(spinal cord injury,SCI)患者血清微小RNA(microRNA,miR)-133a和核苷酸结合寡聚化结构域样受体蛋白3(nucleotide-binding oligomerization domain-like receptors protein 3,NLRP3)表达水平及其与预后的...目的探究脊柱骨折并发脊髓损伤(spinal cord injury,SCI)患者血清微小RNA(microRNA,miR)-133a和核苷酸结合寡聚化结构域样受体蛋白3(nucleotide-binding oligomerization domain-like receptors protein 3,NLRP3)表达水平及其与预后的关系。方法选取2019年1月~2022年3月在贵州省骨科医院治疗的90例脊柱骨折并发SCI患者作为并发SCI组,统计手术后3个月患者预后情况,并依据预后分为预后良好组和预后不良组;另以同期单纯脊柱骨折患者90例作为对照组,记录患者一般资料。采用酶联免疫吸附试验(enzyme-linked immunosorbent assay,ELISA)检测脊柱骨折患者血清NLRP3水平,采用实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)法检测miR-133a水平;受试者工作特征(receiver operating characteristic,ROC)曲线分析血清miR-133a和NLRP3水平预测脊柱骨折并发SCI患者预后的价值;采用多因素Logistic回归分析脊柱骨折并发SCI患者预后不良的影响因素。结果与对照组比较,并发SCI组血清miR-133a水平(0.68±0.19 vs 1.01±0.24)降低,NLRP3水平(136.42±32.78 pg/ml vs 86.35±15.95 pg/ml)升高,差异具有统计学意义(t=10.227,13.030,均P<0.001)。与预后良好组比较,预后不良组椎管侵占率≥50%比例(64.71%vs 23.21%)、受伤至激素类药物使用时间≥8 h比例(70.59%vs 25.00%)、Frankel分级A级比例(41.18%vs 1.79%)和血清NLRP3水平(162.11±46.74 pg/ml vs 120.82±29.75 pg/ml)升高,miR-133a水平(0.58±0.14 vs 0.74±0.18)降低,差异均具有统计学意义(t=4.430~45.267,均P<0.001)。ROC分析显示,血清miR-133a,NLRP3及二者联合预测脊柱骨折并发SCI患者预后不良的曲线下面积(area under the curve,AUC)为0.779(95%CI:0.681~0.877),0.770(95%CI:0.673~0.868)和0.834(95%CI:0.750~0.918)。Logistic回归结果显示,miR-133a[OR(95%CI)=0.824(0.727~0.934)]、NLRP3[OR(95%CI)=2.673(1.359~5.256)]、椎管侵占率≥50%[OR(95%CI)=1.562(1.146~2.129)]和受伤至激素类药物使用时间≥8h[OR(95%CI)=1.305(1.009~1.687)]均是脊柱骨折并发SCI患者发生预后不良的独立影响因素(均P<0.05)。结论脊柱骨折并发SCI患者血清NLRP3水平较高,miR-133a水平较低,与预后密切相关,两者联合对脊柱骨折并发SCI患者预后有较高预测效能。展开更多
基金financially supported by National Natural Science Foundation of China (Nos. 22074033, 22374035)。
文摘Micro RNA-133a(mi RNA-133a) and cardiac troponin I(c Tn I) are different-type crucial biomarkers of acute myocardial infarction(AMI), whose levels are great significance for AMI diagnosis and treatment. Herein,a novel photoelectrochemical-electrochemical(PEC-EC) dual-mode biosensing platform for dual-target assays of mi RNA-133a and c Tn I was developed. In which, a PEC-EC dual-mode sensing platform for mi RNA-133a was constructed based on the changes of the photocurrent inhibition effect and the electrochemical signal of Fc on the Fc-hairpin DNA probe(Fc-HP)/Zn Cd S-quantum dots(QDs)/ITO electrode. Furthermore, under magnetic separation and the specific interaction between c Tn I and its aptamer, the N-doped porous carbon-Zn O polyhedra(NPC-Zn O)-hemin-capture DNA probe hybrid(NH-CP) was obtained and introduced to the Fc-HP/Zn Cd S-QDs/ITO electrode via hybridization between NH-CP and Fc-HP. The hemin molecules encapsulated in NH-CP could effectively induce the photocurrent-polarity-switching of the FcHP/Zn Cd S-QDs/ITO electrode and generate a new electrochemical signal originating from hemin. Thus,c Tn I was assayed sensitively and selectively by the PEC-EC dual-mode biosensing platform. Here, Fc and hemin not only serve as the electrochemical indicators, but also respectively inhibit the photocurrent and switch the photocurrent polarity of Zn Cd S-QDs. Furthermore, the proposed biosensing platform could be easily expanded to the detection of other multiplex-type biomarkers via the change of the sequences of the related DNA probes, implying its significant potential in clinical diagnosis and biological analysis.
基金National Natural Science Foundation of China,No.81370008 and No.81000169Natural Science Foundation of Zhejiang Province,No.R2110159,No.LY15H030006 and No.LY16H030003
文摘AIM To investigate the role of the miR-133a-UCP2 pathway in the pathogenesis of inflammatory bowel disease (IBD) and to explore the potential downstream mechanisms with respect to inflammation, oxidative stress and energy metabolism. METHODS C57BL/6 mice were fed dextran sulfate sodium (DSS) liquid for 7 consecutive days, followed by the administration of saline to the DSS group, UCP2 siRNA to the UCP2 group and a miR-133a mimic to the miR-133a group on days 8 and 11. Body weight, stool consistency and rectal bleeding were recorded daily, and these composed the disease activity index (DAI) score for the assessment of disease severity. After cervical dislocation was performed on day 14, the length of the colon in each mouse was measured, and colonic tissue was collected for further study, which included the following: haematoxylin and eosin staining, UCP2 and miR-133a detection by immunohistochemical staining, western blot and quantitative real-time PCR, measurement of apoptosis by TUNEL assay, and the assessment of inflammation (TNF-alpha, IL-1 beta, IL-6 and MCP1), oxidative stress (H2O2 and MDA) and metabolic parameters (ATP) by ELISA and colorimetric methods. RESULTS An animal model of IBD was successfully established, as shown by an increased DAI score, shortened colon length and specific pathologic changes, along with significantly increased UCP2 and decreased miR-133a levels. Compared with the DSS group, the severity of IBD was alleviated in the UCP2 and the miR-133a groups after successful UCP2 knockdown and miR-133a overexpression. The extent of apoptosis, as well as the levels of TNF-alpha, IL-1 beta, MDA and ATP, were significantly increased in both the UCP2 and miR-133a groups compared with the DSS group. CONCLUSION The miR-133a-UCP2 pathway participates in IBD by altering downstream inflammation, oxidative stress and markers of energy metabolism, which provides novel clues and potential therapeutic targets for IBD.
文摘目的探究脊柱骨折并发脊髓损伤(spinal cord injury,SCI)患者血清微小RNA(microRNA,miR)-133a和核苷酸结合寡聚化结构域样受体蛋白3(nucleotide-binding oligomerization domain-like receptors protein 3,NLRP3)表达水平及其与预后的关系。方法选取2019年1月~2022年3月在贵州省骨科医院治疗的90例脊柱骨折并发SCI患者作为并发SCI组,统计手术后3个月患者预后情况,并依据预后分为预后良好组和预后不良组;另以同期单纯脊柱骨折患者90例作为对照组,记录患者一般资料。采用酶联免疫吸附试验(enzyme-linked immunosorbent assay,ELISA)检测脊柱骨折患者血清NLRP3水平,采用实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)法检测miR-133a水平;受试者工作特征(receiver operating characteristic,ROC)曲线分析血清miR-133a和NLRP3水平预测脊柱骨折并发SCI患者预后的价值;采用多因素Logistic回归分析脊柱骨折并发SCI患者预后不良的影响因素。结果与对照组比较,并发SCI组血清miR-133a水平(0.68±0.19 vs 1.01±0.24)降低,NLRP3水平(136.42±32.78 pg/ml vs 86.35±15.95 pg/ml)升高,差异具有统计学意义(t=10.227,13.030,均P<0.001)。与预后良好组比较,预后不良组椎管侵占率≥50%比例(64.71%vs 23.21%)、受伤至激素类药物使用时间≥8 h比例(70.59%vs 25.00%)、Frankel分级A级比例(41.18%vs 1.79%)和血清NLRP3水平(162.11±46.74 pg/ml vs 120.82±29.75 pg/ml)升高,miR-133a水平(0.58±0.14 vs 0.74±0.18)降低,差异均具有统计学意义(t=4.430~45.267,均P<0.001)。ROC分析显示,血清miR-133a,NLRP3及二者联合预测脊柱骨折并发SCI患者预后不良的曲线下面积(area under the curve,AUC)为0.779(95%CI:0.681~0.877),0.770(95%CI:0.673~0.868)和0.834(95%CI:0.750~0.918)。Logistic回归结果显示,miR-133a[OR(95%CI)=0.824(0.727~0.934)]、NLRP3[OR(95%CI)=2.673(1.359~5.256)]、椎管侵占率≥50%[OR(95%CI)=1.562(1.146~2.129)]和受伤至激素类药物使用时间≥8h[OR(95%CI)=1.305(1.009~1.687)]均是脊柱骨折并发SCI患者发生预后不良的独立影响因素(均P<0.05)。结论脊柱骨折并发SCI患者血清NLRP3水平较高,miR-133a水平较低,与预后密切相关,两者联合对脊柱骨折并发SCI患者预后有较高预测效能。
