Differential IFN-Gamma (IFN-γ), Interleukin 10 (IL-10) and Cardiac Troponin I (cTnI) Responses in Natural Bovine Trypanosomosis in Nigeria

Trypanosomosis is major drawback to profitable livestock production in sub-Sahara African, including Nigeria. Knowledge of the cytokines production in the phase of natural infection may help to better diagnose, treat and prevent bovine trypanosomosis. The purpose of the this study was to determine the levels of interferon-gamma (IFN-γ), interleukin-10 (IL-10) and cardiac troponin–I (cTnI) in the sera of cattle naturally infected with T. brucei, T. congolense and T. vivax and correlate these levels with parasitaemia and PCV of the infected animals. Five milliliter of blood samples were collected via the jugular vein from 411 randomly selected cattle into EDTA and non-citrated bottle. PCV was determined manually using HCT. Trypansomes were detected and characterized by microscopy and PCR, respectively. Serum levels of IFN-γ, IL-10 and cTnI were determined using commercial ELISA kit. Data were summarized using descriptive statistic and significance of differences determined by ANOVA. Of the 62 samples positive for trypanosomes by microscopy, 50 samples were confirmed to species level by PCR. The sera levels of IFN-γ, IL-10 and cTnI of infected cattle were higher than non-infected cattle. The differences were not significant (p γ, IL-10 and cTnI in cattle with natural trypanosomosis. Further investigation is required to understand the specific effect of trypanosomes on myocardiac integrity and interaction between the two cytokines in natural trypanosomosis in cattle.

深静脉血栓形成患者下肢深静脉血栓密度、血清cTnI、Hcy水平与合并肺栓塞风险的关系研究

目的探讨深静脉血栓(DVT)形成患者下肢深静脉血栓密度、血清心肌肌钙蛋白I(cTnI)及同型半胱氨酸(Hcy)水平与合并肺栓塞风险的关系。方法回顾性分析2016年1月至2019年1月在秦皇岛市第一医院进行治疗的108例DVT患者,依据是否合并肺栓塞分为对照组(单纯DVT)68例,观察组(DVT合并肺栓塞)40例。收集两组基线资料[年龄、性别、高血压史、高血脂史、慢性肺部疾病、脑血管意外、下肢骨折、吸烟史、饮酒史、血栓受累肢体、受累静脉、下肢深静脉血栓密度比、wells评分、血小板计数(PLT)、中性粒细胞计数(NEUT)、C反应蛋白(CRP)、D二聚体(D-D)、cTnI及Hcy水平]并进行比较,分析DVT合并肺栓塞的影响因素。根据肺栓塞危险程度将DVT合并肺栓塞患者划分为高危组(n=10)、中危组(n=17)、低危组(n=13);比较不同危险程度肺栓塞间下肢深静脉血栓密度、血清cTnI、Hcy水平及wells评分间差异。分析下肢深静脉血栓密度、血清cTnI及Hcy水平与wells评分的关系。结果两组患者年龄、性别、高血压、高血脂、慢性肺部疾病、脑血管意外、下肢骨折、吸烟史、饮酒史、血栓受累肢体及受累静脉比较,差异均无统计学意义(P>0.05);观察组下肢深静脉血栓密度比、wells评分、PLT、NEUT、CRP、D-D、cTnI及Hcy水平分别为(52.37±12.19)%、(5.16±1.07)分、(284.63±90.72)×10^(9)/L、(71.22±10.16)%、(15.29±2.39)mg/L、(1051.27±271.19)ng/mL、(0.33±0.13)ng/mL、(21.27±2.16)μmol/L,均高于对照组[41.67±10.28)%、(3.28±0.94)分、(206.27±86.15)×10^(9)/L、(64.31±8.75)%、(10.33±1.71)mg/L、(739.52±206.34)ng/mL、(0.21±0.06)ng/mL、(10.19±1.75)μmol/L],差异均有统计学意义(P<0.05)。Logistic回归分析结果显示,下肢深静脉血栓密度比、wells评分、cTnI及Hcy为DVT合并肺栓塞的独立预测因子(P<0.05)。肺栓塞低危组下肢深静脉血栓密度比、cTnI、Hcy水平及wells评分均低于中危组、高危组,差异均有统计学意义(P<0.05)。经Spearman相关性分析,下肢深静脉血栓密度比、cTnI、Hcy水平与wells评分呈正相关(P<0.05)。结论DVT患者下肢深静脉血栓密度、血清cTnI、Hcy可有效预测合并肺栓塞,同时可判断患者肺栓塞严重程度。

超声心动图联合血清cTnI、GDF-15检测对老年乳腺癌患者术后化疗心脏损伤的评估价值

目的探究超声心动图联合血清心肌肌钙蛋白I(cTnI)、生长分化因子-15(GDF-15)对老年乳腺癌(BC)患者术后化疗心脏损伤的评估价值。方法选取北京市大兴区人民医院2019年9月至2022年8月收治的112例老年BC术后应用表柔比星为主的化疗患者为研究对象,按照是否发生心脏损伤将其分为:心脏损伤组(40例)和心脏未损伤组(72例)。评估超声心动图对老年BC患者术后化疗心脏损伤的诊断价值;采用酶联免疫吸附法检测两组血清cTnI、GDF-15水平;采用受试者工作特征曲线评估血清cTnI、GDF-15对老年BC患者术后化疗心脏损伤的诊断价值;以心脏损伤判定标准为金标准,评价超声心动图、血清cTnI、GDF-15及三者联合对老年BC患者术后化疗心脏损伤的诊断价值。结果超声心动图诊断老年BC患者术后化疗心脏损伤的灵敏度、特异度、准确度分别为77.50%、88.89%、84.82%;心脏损伤组患者血清cTnI、GDF-15水平均明显高于心脏未损伤组(P<0.05);血清cTnI、GDF-15诊断老年BC患者术后化疗心脏损伤的曲线下面积分别为0.864、0.834,截断值分别为221.88 ng/L、8.06 ng/L,灵敏度分别为75.00%、80.00%,特异度分别为94.44%、87.50%,准确度分别为87.50%、84.82%;超声心动图联合血清cTnI、GDF-15诊断老年BC患者术后化疗心脏损伤的灵敏度、特异度、准确度分别为97.50%、86.11%、90.18%,优于单独诊断。结论超声心动图联合血清cTnI、GDF-15对老年BC患者术后化疗致心脏损伤有较高诊断价值,可有效提高灵敏度、准确度,具有较高特异度。

老年慢性心衰患者血清cTnI、CK-MB水平与心电图QRS波的相关性研究

目的:分析老年慢性心力衰竭(CHF)患者血清心肌肌钙蛋白I(cTnI)、肌酸激酶同工酶MB(CK-MB)与心电图QRS波的相关性。方法:选取2020年9月至2023年10月六安市中医院接收的100例老年CHF患者,将其纳入观察组,另选同期于本院进行体检的100名老年健康者纳入健康对照组。所有受检者均接受血清cTnI、CK-MB检查及心电图检查,比较两组受检者的QRS波时限、血清cTnI、CK-MB水平。100例观察组患者再根据心电图QRS波时限是否异常分为两个亚组,即QRS异常组(52例,QRS波时限≥120 ms)和QRS正常组(48例,QRS波时限<120 ms);比较两个亚组患者一般资料,血清cTnI、CK-MB水平;分析老年CHF患者血清c Tn I、CK-MB水平与心电图QRS波的相关性。结果:与健康对照组比较,观察组血清c Tn I(1.912±0.401 vs. 0.861±0.173)μg/L、CK-MB(23.272±4.801 vs. 10.573±2.332)U/L水平更高,QRS波时限更长(126.761±17.452 vs. 104.475±13.351)μg/L,两组比较差异有统计学意义(t=24.159、23.802、10.145,P<0.05)。观察组患者经心电图检查发现,有52例患者出现心电图QRS波时限异常,QRS波时限平均为(141.641±12.581)ms;48例患者心电图QRS波时限正常,QRS波时限平均为(110.652±10.751)ms。QRS波时限异常组患者的血清c Tn I、CK-MB水平均高于QRS正常组患者,差异有统计学意义(t=7.534、10.362,P<0.05);经一般线性双变量Pearson检验结果显示,c Tn I、CK-MB两项血清指标与QRS波时限均呈正相关(r=0.395、0.453,P<0.05)。经logistic回归分析结果显示,血清c Tn I、CK-MB水平与心电图QRS波时限有关,过表达可能是心电图QRS波时限异常的风险因子(OR=4.444、1.445,P<0.05)。结论:老年CHF患者血清c Tn I、CK-MB水平异常升高,二者过表达与心电图QRS波时限异常有关,可能是QRS波时限异常的风险因子。

A MXene-functionalized paper-based electrochemical immunosensor for label-free detection of cardiac troponin I

Convenient,rapid,and accurate detection of cardiac troponin I(cTnI)is crucial in early diagnosis of acute myocardial infarction(AMI).A paper-based electrochemical immunosensor is a promising choice in this field,because of the flexibility,porosity,and cost-efficacy of the paper.However,paper is poor in electronic conductivity and surface functionality.Herein,we report a paper-based electrochemical immunosensor for the label-free detection of cTnI with the working electrode modified by MXene(Ti_(3)C_(2))nanosheets.In order to immobilize the bio-receptor(anti-cTnI)on the MXene-modified working electrode,the MXene nanosheets were functionalized by aminosilane,and the functionalized MXene was immobilized onto the surface of the working electrode through Nafion.The large surface area of the MXene nanosheets facilitates the immobilization of antibodies,and the excellent conductivity facilitates the electron transfer between the electrochemical species and the underlying electrode surface.As a result,the paper-based immunosensor could detect cTnI within a wide range of 5-100 ng/mL with a detection limit of 0.58 ng/mL.The immunosensor also shows outstanding selectivity and good repeatability.Our MXene-modified paper-based electrochemical immunosensor enables fast and sensitive detection of cTnI,which may be used in real-time and cost-efficient monitoring of AMI diseases in clinics.

SYNTAX积分联合血清NT-pro BNP、CK-MB、cTnI水平对急性心肌梗死患者PCI术预后的评估价值

目的探讨SYNTAX积分联合血清N末端钠尿肽前体(NT-pro BNP)、肌酸激酶同工酶(CK-MB)、心肌钙蛋白(cTnI)水平评估急性心肌梗死(AMI)患者经皮冠状动脉介入治疗(PCI)术预后的价值。方法选取2020年1月—2022年11月我院85例行PCI术的AMI患者为研究对象,根据患者术后是否存在主要不良心脑血管事件(MACCE)分为预后良好组(n=63)和预后不良组(n=22),术前均行冠脉造影,采用SYNTAX积分评估患者冠脉变程度,住院期间常规测定患者血清NT-pro BNP、CK-MB、cTnI水平,术后随访半年。比较两组一般临床资料、SYNTAX积分及血清NT-pro BNP、CK-MB、cTnI水平,采用多因素Logistic回归分析法分析影响AMI患者PCI术预后的危险因素,采用受试者工作曲线分析SYNTAX积分联合血清NT-pro BNP、CK-MB、cTnI水平对AMI患者PCI术预后的评估价值。结果两组性别、年龄、BMI、合并高血压、糖尿病、血清TC、TG、HDL-C、LDL-C、Scr、LVEF、LVEDD比较,差异无统计学意义(P>0.05),Killip分级、病变支数分布、支架置入数、介入治疗时间、住院时间比较,差异均有统计学意义(P<0.05);预后不良组SYNTAX积分、血清NT-pro BNP、CK-MB、cTnI水平均显著高于预后良好组(P<0.05);多因素Logistic回归分析显示,病变支数、支架置入数、SYNTAX积分、血清NT-pro BNP、CK-MB、cTnI水平是影响AMI患者PCI术预后的危险因素(P<0.05);ROC曲线显示,SYNTAX积分、NT-pro BNP、CK-MB、cTnI单独及联合预测AMI患者PCI术预后的AUC分别为0.747、0.754、0.752、0.881、0.952。结论SYNTAX积分、血清NT-pro BNP、CK-MB、cTnI水平单独或联合检测均可有效预测AMI患者PCI术后MACCE的发生,联合检测预测效能显著提升。

High-sensitivity cardiac troponins in everyday clinical practice

High-sensitivity cardiac troponin(hs-cTn) assays are increasingly being used in many countries worldwide,however,a generally accepted definition of high-sen-sitivity is still pending.These assays enable cTn mea-surement with a high degree of analytical sensitivity with a low analytical imprecision at the low measuring range of cTn assays(coefficient of variation of < 10% at the 99th percentile upper reference limit).One of the most important advantages of these new assays is that they allow novel,more rapid approaches to rule in or rule out acute coronary syndromes(ACSs) than with previous cTn assay generations which are still more commonly used in practice worldwide.hs-cTn is also more sensitive for the detection of myocardial damage unrelated to acute myocardial ischemia.Therefore,the increase in early diagnostic sensitivity of hs-cTn assays for ACS comes at the cost of a reduced ACS specificity,because more patients with other causes of acute or chronic myocardial injury without overt myocardial isch-emia are detected than with previous cTn assays.As hs-cTn assays are increasingly being adopted in clinical practice and more hs-cTn assays are being developed,this review attempts to synthesize the available clinical data to make recommendations for their everyday clini-cal routine use.

Comparison of plasma microRNA-1 and cardiac troponin T in early diagnosis of patients with acute myocardial infarction

BACKGROUND:Early reperfusion can effectively treat acute myocardial infarction(AMI) and reduce the mortality signif icantly. This study aimed to compare the role of plasma microRNA-1(miR-1) and cardiac troponin T(cTnT) in early diagnosis of AMI patients.METHODS:From May 2011 to May 2012,plasma samples were collected from 56 AMI patients and 28 non-AMI controls. The expression of plasma miR-1 was measured by quantitative reverse transcription-polymerase chain reaction(qRT-PCR),and the level of plasma cTnT was measured using electrochemiluminescence-based methods on an Elecsys 2010 Immunoassay Analyzer. SPSS 16.0 was used for the statistical analysis of the results. Data were expressed as mean±standard deviation unless otherwise described. The differences about clinical characteristics between the AMI patients and controls were tested using Student's t test or Fisher's exact test. The Mann-Whitney U test was conducted to compare the expression of microRNAs between the AMI patients and controls. MicroRNAs expression between different intervals of the AMI patients was compared using Wilcoxon's signed-rank test. The receiver operating characteristic(ROC) curve was established to discriminate the AMI patients from the controls.RESULTS:In the present study,the expression of plasma miR-1 was signifi cantly increased in the AMI patients compared with the healthy controls(P<0.01). The plasma miR-1 in the AMI patients decreased to the normal level at 14 days(P>0.05). The expression of plasma miR-1 was not related to the clinical characteristics of the study population(P>0.05). ROC curve analyses demonstrated that miR-1 was specifi c and sensitive for the early diagnosis of AMI,but not superior to cTnT.CONCLUSION:Plasma miR-1 could be used in the early diagnosis of AMI,but it is similar to cTnT.

The combination of creatine kinase-myocardial band isoenzyme and point-of-care cardiac troponin/contemporary cardiac troponin for the early diagnosis of acute myocardial infarction

BACKGROUND:The early diagnosis of acute myocardial infarction(AMI)remains challenging,especially for institutions without the high-sensitive cardiac troponin(hs-c Tn)assay.Herein,we aim to assess the value of creatine kinase-myocardial band isoenzyme(CK-MB)combined with different cardiac troponin(c Tn)assays in AMI diagnosis.METHODS:This multicenter,observational study included 3,706 patients with acute chest pain from September 1,2015,to September 30,2017.We classified the participants into three groups according to the c Tn assays:the point-of-care c Tn(POC-c Tn)group,the contemporary c Tn(c-c Tn)group,and hs-c Tn group.The diagnostic value was quantified using sensitivity and the area under the curve(AUC).RESULTS:Compared to the single POC-c Tn/c-c Tn assays,combining CK-MB and POC-c Tn/c-c Tn increased the diagnostic sensitivity of AMI(56.1%vs.63.9%,P<0.001;82.7%vs.84.3%,P=0.025).In contrast,combining CK-MB and hs-c Tn did not change the sensitivity compared with hs-c Tn alone(95.0%vs.95.0%,P>0.999).In the subgroup analysis,the sensitivity of combining CKMB and c-c Tn increased with time from symptom onset<6 h compared with c-c Tn alone(72.8%vs.75.0%,P=0.046),while the sensitivity did not increase with time from symptom onset>6 h(97.5%vs.98.3%,P=0.317).The AUC of the combination of CK-MB and POC-c Tn significantly increased compared to the single POC-c Tn assay(0.776 vs.0.750,P=0.002).The AUC of the combined CKMB and c-c Tn/hs-c Tn assays did not significantly decrease compared with that of the single c-c Tn/hs-c Tn assays within 6 h.CONCLUSIONS:The combination of CK-MB and POC-c Tn or c-c Tn may be valuable for the early diagnosis of AMI,especially when hs-c Tn is not available.

Characteristics of elevated cardiac troponin I in patients with acute ischemic stroke

Objective To study prognostic characteristics of cardiac troponin I （cTnI） elevation in acute ischemic stroke. Methods We retrospectively studied patients （n = 248） with acute ischemic stroke, acute ST-segment elevation myocardial infarction, and acute non-ST-elevation myocardial infarction who were treated between January 2013 and October 2015. Baseline demographic data and changes in cTnI levels among these three groups were compared. Patients with acute ischemic stroke were assigned to either the cTnI elevation group （cTnI 〉 0.034 ng/mL） or the no cTnI elevation group （cTnI ≤ 0.034 ng/mL）. Logistic regression analysis was used to identify risk factors associated with elevated serum cTnI in patients with acute ischemic stroke. Moreover, the duration of hospital stay and incidence of major cardiovascular outcomes were compared in patients with acute ischemic stroke, with or without elevated cTnI. Results In this study population of patients with acute ischemic stroke （n = 178）, acute ST-segment elevation myocardial infarction （n = 35）, and acute non-ST-elevation myocardial infarction （n = 35）, patients with acute ischemic stroke with elevated cTnI comprised 18.54% of subjects. Patients with elevated cTnI were older and more likely to have a history of hypertension. In addition, these patients had higher levels of inflammatory markers, reduced renal functions, increased D-dimer levels, higher NIH stroke scores, and lower left ventricular ejection fractions. Logistic regression analysis showed that both percentage of neutrophil and NIH stroke scores were elevated; estimated glomerular filtration rate and left ventricular ejection fraction were decreased in patients with acute ischemic stroke who had elevated cTnI, and they had more frequent major cardiovascular events during hospital stay. Conclusion Elevated cTnI detected in patients with acute ischemic stroke, indicated a greater likelihood of poor short-term prognosis during hospital stay.

Prognostic value of high-sensitivity cardiac troponin T in patients with en-domyocardial-biopsy proven cardiac amyloidosis

Objective To investigate prognostic predictors of long-term survival of patients with cardiac amyloidosis （CA）, and to determine predictive value of high-sensitivity cardiac troponin T （hs-cTnT） in CA patients. Methods We recruited 102 consecutive CA cases and followed these patients for 5 years. We described their clinical characteristics at presentation and used a new, high-sensitivity assay to determine the concentration of cTnT in plasma samples from these patients. Results The patients with poor prognosis showed older age （56 ±12 years vs. 50 ±15 years, P=0.022）, higher incidences of heart failure （36.92%vs. 16.22%, P=0.041）, pericardial effusion （60.00%vs. 35.14%, P=0.023）, greater thickness of interventricular septum （IVS） （15 ±4 mm vs. 13 ±4 mm, P=0.034）, higher level of hs-cTnT （0.186 ±0.249 ng/mL vs. 0.044 ±0.055 ng/mL, P=0.001） and higher NT-proBNP （N-terminal pro-B-type natriuretic pep-tide） levels （11,742 ± 10,464 pg/mL vs. 6,031 ± 7,458 pg/mL, P=0.006）. At multivariate Cox regression analysis, heart failure （HR：1.78, 95%CI：1.09-2.92, P=0.021）, greater wall thickness of IVS （HR：1.44, 95%CI：1.04-3.01, P=0.0375） and higher hs-cTnT level （HR：6.16, 95%CI：2.20-17.24, P=0.001） at enrollment emerged as independent predictors of all-cause mortality. Conclusions We showed that hs-cTnT is associated with a very ominous prognosis, and it is also the strongest predictor of all-cause mortality in multivariate analysis. Examination of hs-cTnT concentrations provides valuable prognostic information concerning long-term outcomes.

Prognostic value of N-terminal pro B-type natriuretic peptide and troponin Ⅰ in children with dengue shock syndrome

Objective:To investigate the contribution of N-terminal pro B-type natriuretic peptide(NT-pro BNP)and troponin Ⅰ to mortality in children with dengue shock syndrome.Methods:A longitudinal study was conducted on children with dengue shock syndrome in a hospital in southern Vietnam.Detailed clinical histories,physical examinations,and laboratory parameters,including NT-pro BNP and troponin Ⅰ,were recorded.A comparison between survival and non-survival was carried out to identify factors influencing mortality.Results:A total of 107 patients with a median age of 9 years were included in the study.Among them,63.6%(68/107)presented with compensated shock,36.4%(39/107)had hypotensive shock,23.4%(25/107)required mechanical ventilation,and 12.1%(13/107)died.The NT-pro BNP levels were 3.9 pmol/L(IQR:1.9,10.3)and 15.2 pmol/L(5.8,46.3),while the median high sensitivity troponin Ⅰ levels were 20 pg/L(6,95)and 62 pg/L(12,325)at the first and second measurements,respectively.The mortality group exhibited higher rates of hypotensive shock,prolonged shock,lactate levels,liver damage,NT-pro BNP,and troponin Ⅰ levels.Hypotensive shock(OR 12.96,95%CI 2.70-62.30,P=0.004),prolonged shock(OR 39.40,95%CI 6.68-232.70,P<0.001),AST>1000 IU/L(OR 9.50,95%CI 2.63-34.34,P=0.041),and NT-pro BNP>7 pmol/L(OR 44.40,95%CI 5.44-362.20,P=0.001)were identified as predictive factors for mortality in dengue shock syndrome.Conclusions:The NT-pro BNP level could serve as a potential biomarker for predicting mortality in children with dengue shock syndrome.

术前cTnI、NT-proBNP及D-二聚体水平对急性冠状动脉综合征患者PCI术中无复流的预测价值

目的探讨术前肌钙蛋白I(cTnI)、N末端脑钠肽前体(NT-proBNP)及D-二聚体水平对急性冠状动脉综合征患者经皮冠状动脉介入治疗(PCI)术中无复流的预测价值。方法选取郑州颐和医院于2021年1月至2023年1月收治的急性冠状动脉综合征患者120例,均在发病12 h内给予PCI,根据术中心肌梗死溶栓治疗血流情况将其分为正常血流组(98例)及无复流组(22例),比较两组患者术前血清cTnI、NT-proBNP及D-二聚体水平,临床资料,多因素分析影响患者PCI术中无复流的影响因素,绘制受试者工作曲线(ROC)分析术前血清cTnI、NT-proBNP及D-二聚体水平对PCI术中无复流的预测价值。结果无复流组术前血清cTnI、NT-proBNP及D-二聚体水平均高于正常血流组(P<0.05);无复流组年龄高于正常血流组(P<0.05),高血压患者多于正常血流组(P<0.05);回归结果显示,血清cTnI、NT-proBNP及D-二聚体高水平均是急性冠状动脉综合征患者在PCI术中发生无复流的危险因素(P<0.05);ROC结果显示,cTnI(AUC=0.873,95%CI:0.791~0.956,P<0.001)、NT-proBNP(AUC=0.921,95%CI:0.864~0.978,P<0.001)及D-二聚体(AUC=0.827,95%CI:0.727~0.927,P<0.001)对急性冠状动脉综合征患者PCI术中发生无复流诊断价值较高。结论急性冠状动脉综合征患者术前cTnI、NT-proBNP及D-二聚体高水平是患者PCI术中发生无复流的危险因素,三者对术中发生无复流均具有一定预测价值,NT-proBNP预测价值相对较高。

脓毒症心功能障碍患者Scr、cTnI与超声心动图指标及预后的关系

目的探讨脓毒症心功能障碍患者血肌酐(Scr)、心肌肌钙蛋白I(cTnI)与超声心动图指标及其预后的关系。方法回顾性选择2019年8月至2022年1月绍兴第二医院收治的脓毒症患者164例,均于入院24 h内行Scr、cTnI水平检测和超声心动图检查。超声心动图指标包括左心室舒张末期内径(LVEDd)、左心室收缩末期内径(LVESd)、左心房内径(LAD)、左心室射血分数(LVEF)、每搏输出量(SV)、二尖瓣舒张早期充盈峰E峰流速与舒张晚期充盈峰A峰流速比值(E/A)、舒张早期二尖瓣峰流速与二尖瓣环运动速度比值(E/e')。采用Pearson相关分析Scr、cTnI水平与超声心动图各指标间的相关性。采用多因素logistic回归分析脓毒症心功能障碍患者28 d死亡的影响因素。采用ROC曲线分析Scr、cTnI水平单独及联合检测对预后预测的价值。结果收缩功能障碍者46例,舒张功能障碍者38例,心功能正常者80例。Pearson相关性分析显示,Scr、cTnI水平与脓毒症心功能障碍患者的LVEDd、LVESd、LAD、E/e'呈正相关(均P<0.05),与LVEF、SV、E/A呈负相关(均P<0.05)。随访28 d,84例心功能障碍患者中死亡49例(58.33%)。死亡组的Scr、cTnI水平及LVEDd、LVESd、LAD、E/e'高于存活组,LVEF、SV、E/A低于存活组,差异均有统计学意义(均P<0.05)。多因素logistic回归分析结果显示,年龄、LVEDd、LVESd、LAD、LVEF、SV、E/A、E/e'及Scr、cTnI水平均是心功能障碍患者28d死亡的影响因素(均P<0.05)。ROC曲线结果显示,Scr、cTnI联合评估心功能障碍患者28 d死亡的AUC高于各单独检测(均P<0.05)。结论脓毒症心功能障碍患者Scr、cTnI水平与超声心动图参数及近期预后相关。

An electrochemiluminescent magneto-immunosensor for ultrasensitive detection of hs-cTnI on a microfluidic chip

Sensitive detection and precise quantitation of trace-level crucial biomarkers in a complex sample matrix has become an important area of research.For example,the detection of high-sensitivity cardiac troponin I (hs-cTnI) is strongly recommended in clinical guidelines for early diagnosis of acute myocardial infarction.Based on the use of an electrode modified by single-walled carbon nanotubes (SWCNTs) and a Ru(bpy)32+-doped silica nanoparticle (Ru@SiO2)/tripropylamine (TPA) system,a novel type of electrochemiluminescent (ECL) magnetoimmunosensor is developed for ultrasensitive detection of hs-cTnI.In this approach,a large amount of[Ru(bpy)3]2+is loaded in SiO2(silica nanoparticles) as luminophores with high luminescent efficiency and SWCNTs as electrode surface modification material with excellent electrooxidation ability for TPA.Subsequently,a hierarchical micropillar array of microstructures is fabricated with a magnet placed at each end to efficiently confine a single layer of immunomagnetic microbeads on the surface of the electrode and enable 7.5-fold signal enhancement In particular,the use of transparent SWCNTs to modify a transparent ITO electrode provides a two-order-of-magnitude ECL signal amplification.A good linear calibration curve is developed for hs-cTnI concentrations over a wide range from 10 fg/ml to 10 ng/ml,with the limit of detection calculated as 8.720 fg/ml (S/N=3).This ultrasensitive immunosensor exhibits superior detection performance with remarkable stability,reproducibility,and selectivity.Satisfactory recoveries are obtained in the detection of hs-cTnI in human serum,providing a potentia analysis protocol for clinical applications.

不同NYHA分级慢性心力衰竭患者血清cTnI、NT-proBNP、UA水平变化及其与预后转归的关系

目的探讨不同纽约心脏病协会(NYHA)分级慢性心力衰竭(CHF)患者血清肌钙蛋白I(cTnI)、氨基末端B型利钠肽前体(NT-proBNP)、尿酸(UA)水平的变化,并分析其与预后转归的关系。方法收集2020年1月—2022年1月本院收治的95例CHF患者临床资料,采用NYHA分级分为Ⅱ级29例(Ⅱ级组),Ⅲ级38例(Ⅲ级组),Ⅳ级28例(Ⅳ级组),比较3组血清cTnI、NT-proBNP、UA水平,分析CHF患者心功能与血清cTnI、NT-proBNP、UA水平的相关性;评估CHF患者出院后1个月复查时血清cTnI、NT-proBNP、UA水平变化情况,比较血清cTnI、NT-proBNP、UA短期(出院后1个月)升高与未升高者出院12个月心血管终点事件发生情况。结果3组患者性别、年龄、患病史等基线资料比较,差异无统计学意义(P>0.05);Ⅱ级组、Ⅲ级组与Ⅳ级组左心室舒张末期内径(LVEDD)及血清cTnI、NT-proBNP、UA水平依次明显升高,左心室射血分数(LVEF)则依次明显下降,且两两比较差异均有统计学意义(P<0.05)。Pearson相关系数分析显示,CHF患者血清cTnI、NT-proBNP、UA水平均与LVEDD呈显著正相关(P<0.05),均与LVEF呈显著负相关(P<0.05)。出院后1个月,3组患者血清cTnI、NT-proBNP、UA水平均较入院次日显著降低(P<0.05),但cTnI、NT-proBNP、UA升高>20%者分别有4.21%、7.37%、30.53%。95例CHF患者中有72例获得出院后12个月随访,有心血管终点事件31例(43.06%)。血清cTnI、NT-proBNP短期升高与未升高者出院后12个月心血管终点事件发生率比较,差异无统计学意义(P>0.05);血清UA短期升高者出院后12个月心血管终点事件发生率明显高于未升高者(P<0.05),无心血管终点事件发生的生存时间明显低于未升高者(P<0.05)。结论入院时血清cTnI、NT-proBNP、UA水平与CHF患者心功能分级有关,血清UA短期升高者心血管终点事件发生风险更高。

注射用重组人脑利钠肽联合左西孟旦治疗心力衰竭的效果及对MMP-2、cTnI的影响

目的:探析注射用重组人脑利钠肽(新活素)联合左西孟旦治疗心力衰竭的效果及对基质金属蛋白酶2(MMP-2)、心肌肌钙蛋白I(cTnI)的影响。方法:选取2021年2月-2023年7月黑龙江远东心脑血管医院收治的90例心力衰竭患者作为研究对象。根据住院号随机抽取的方式将其划分为对照组和治疗组,各45例。对照组给予左西孟旦治疗,治疗组在对照组基础上给予新活素治疗。比较两组临床疗效,治疗前后心功能指标、相关实验室指标。结果:治疗组治疗总有效率为93.33%,高于对照组的77.78%,差异有统计学意义(P<0.05)。治疗后,治疗组N末端脑钠肽前体(NT-proBNP)、左室舒张末期内径(LVEDD)水平均低于对照组,左室舒张早期/晚期峰值速率比值(E/A)、左室射血分数(LVEF)水平均高于对照组,差异有统计学意义(P<0.05)。治疗后,治疗组MMP-2、cTnI水平均低于对照组,差异有统计学意义(P<0.05)。结论:对心力衰竭患者应用新活素与左西孟旦联合给药的方案可获得确切的效果,能有效地减轻心肌损伤,较好地改善心脏的功能。

产前血清BNP、cTnI及D-二聚体联合检测预测孕产妇发生肺栓塞价值

目的:探究孕妇产前血清脑钠肽(BNP)、肌钙蛋白(cTnI)及D-二聚体联合检测对孕产妇发生肺栓塞的预测价值。方法:收集2018年9月-2023年9月在本院和通用技术宝石花医疗吉林市化工医院产前检查且发生肺栓塞的孕产妇35例(观察组)、分娩未发生肺栓塞的孕产妇50例(对照组)临床资料。比较两组血清中BNP、cTnI及D-二聚体水平;多因素logistic回归分析孕产妇发生肺栓塞的影响因素;受试者工作特征(ROC)曲线分析产前血清BNP、cTnI及D-二聚体水平对孕产妇发生肺栓塞的预测价值。结果:观察组血清BNP(110.36±14.52 pg/ml)、cTnI(0.73±0.29 ng/ml)及D-二聚体(2.81±0.29μg/ml)均高于对照组(89.72±11.87 pg/ml、0.44±0.07 ng/ml、2.46±0.25μg/ml),血清BNP、cTnI及D-二聚体水平异常升高均为孕产妇发生肺栓塞的独立危险因素;产前血清BNP、cTnI、D-二聚体及3项联合预测孕产妇发生肺栓塞的曲线下面积分别为0.857、0.851、0.858、0.921,3项联合预测效能最高(均P<0.05)。结论:发生肺栓塞的孕产妇产前血清BNP、cTnI及D-二聚体水平均上调,且异常升高均为发生肺栓塞独立危险因素,3项联合对孕产妇发生肺栓塞有较高的预测价值。

AMI合并HF患者血清cTnI、MYO、CK-MB与心力衰竭分级、心室重塑及预后关系

目的 分析急性心肌梗死(AMI)合并心力衰竭(HF)患者血清心肌钙蛋白(cTnI)、肌红蛋白(MYO)、肌酸激酶同工酶(CK-MB)水平变化及与心力衰竭分级、心室重塑及预后关系。方法 前瞻性随机选取2022年3月—2023年12月淮南东方医院集团总医院71例AMI合并HF患者(AMI合并HF组)及同期46例单纯AMI患者(单纯AMI组),对比两组基线资料及血清cTnI、MYO、CK-MB水平差异,将AMI合并HF患者根据Killip心力衰竭分级评估法分为Ⅱ级10例、Ⅲ级42例、Ⅳ级19例,比较不同心力衰竭分级患者血清cTnI、MYO、CK-MB水平及心室重塑指标[左心室舒张末内径(LVEDD)、舒张末左心室后壁厚度(PWT)、舒张末期室间隔厚度(IVSD)、左室射血分数(LVEF)、左心室质量分数(LVMI)];采用Pearson相关分析法探究血清cTnI、MYO、CKMB水平与心室重塑指标相关性;绘制受试者工作特征曲线(ROC)探究血清cTnI、MYO、CK-MB对出院后1年内心血管终点事件预测价值。结果 AMI合并HF组与单纯AMI组基线资料比较差异均无统计学意义(P>0.05);AMI合并HF组血清cTnI、MYO、CK-MB水平均较单纯AMI组明显升高(P<0.05);不同心力衰竭分级AMI合并HF患者血清cTnI、MYO、CK-MB水平及LVEDD、IVSD、LVEF、LVMI水平比较差异均有统计学意义(P<0.05),其中cTnI、CK-MB、IVSD、LVMI均表现为Ⅳ级>Ⅲ级>Ⅱ级(P<0.05),MYO在Ⅳ级中较Ⅲ级、Ⅱ级明显升高(P<0.05),LVEDD在Ⅳ级、Ⅲ级中较Ⅱ级明显升高(P<0.05),LVEF表现为Ⅳ级<Ⅲ级<Ⅱ级(P<0.05)。Pearson相关性分析显示,血清cTnI、MYO、CK-MB均与LVEDD、IVSD、LVMI呈正相关(P<0.05),与LVEF呈负相关(P<0.05)。随访1年内,32例(45.07%)发生心血管终点事件,其中事件组血清cTnI、CK-MB水平明显高于非事件组(P<0.05)。血清cTnI、CK-MB水平预测心血管终点事件的ROC曲线下面积分别为0.848、0.886(P<0.05)。结论 AMI后HF患者血清cTnI、MYO、CK-MB水平明显升高,且与心功能、心室重塑相关,其中cTnI、CK-MB对心血管终点事件有一定预测价值。

联合检测血清Hcy、CTnI、TG/HDL-C、Lp(a)在冠心病中的诊断价值分析

目的:分析血清同型半胱氨酸(Hcy)、心肌肌钙蛋白I (CTnI)、甘油三酯/高密度脂蛋白胆固醇(TG/HDL-C)、脂蛋白(a)[LP (a)]联合检测诊断冠心病的效能。方法:选取2021年5月—2022年5月郑州市第九人民医院收治的63例冠心病患者纳入观察组,另将同期于医院体检的54例健康人群纳入对照组。采集两组受试者静脉血,检测对比其Hcy、CTnI、TG/HDL-C、Lp (a)的差异。另绘制受试者ROC曲线,分析Hcy、CTnI、TG/HDL-C、Lp (a)单独或联合检测诊断冠心病的效能。结果:观察组患者Hcy、CTnI、TG/HDL-C、LP (a)高于对照组,差异有统计学意义(t=21.556、35.837、11.090、45.618,P<0.05);ROC结果显示,Hcy、CTnI、TG/HDL-C、Lp (a)联合检测的曲线下面积(AUC)为0.916,高于单独检测的0.807、0.869、0.846、0.810。结论:Hcy、CTnI、TG/HDL-C、Lp (a)在冠心病患者机体内呈异常表达,联合检测可于早期诊断出冠心病。