初诊活动性肺结核患者血浆IL-6，IL-17，IL-37及TIM-3水平表达及其临床意义

目的　探讨初诊肺结核患者血浆白细胞介素-6（IL-6）、白细胞介素-17（IL-17）、白细胞介素-37（IL-37）及T细胞免疫球蛋白黏蛋白分子-3(TIM-3)水平变化及其临床意义。方法　收集2018年1月～2020年10月百色市人民医院收治的活动性肺结核患者57例、肺炎患者50例和健康对照40例。57例肺结核患者中菌阳肺结核31例,菌阴肺结核26例。57例肺结核按病情轻重、病程长短及病变范围分为轻症组32例和重症组25例。采用酶联免疫吸附测定（ELISA）法检测各组血浆IL-6,IL-17,IL-37及TIM-3水平,并进行比较。结果　肺结核组血浆IL-6（41.37±13.50 pg/ml vs 26.28±9.16pg/ml,3.05±1.08 pg/ml）,IL-17（62.50±10.73pg/ml vs 30.47±7.18pg/ml,16.13±5.86pg/ml）,IL-37（14.63±4.18pg/ml vs 9.85±2.74pg/ml,4.10±1.02 pg/ml）及TIM-3（18.17±5.16ng/ml vs 11.80±3.52ng/ml,6.24±2.15 ng/ml）水平均明显高于肺炎组和对照组,差异均有统计学意义（t=7.338~13.273,均P＜0.001）。菌阳肺结核组血浆IL-6（52.60±15.71pg/ml vs 30.16±8.95 pg/ml）,IL-17（72.35±15.20 pg/ml vs 46.52±9.13 pg/ml）,IL-37（16.50±6.14 pg/ml vs 12.48±3.17 pg/ml）及TIM-3（21.70±7.93ng/ml vs 15.21±4.92 ng/ml）水平均明显高于菌阴肺结核组,差异具有统计学意义（t=8.472,10.161,6.925,9.106,均P＜0.001）。重症组血浆IL-6（56.38±17.26pg/ml vs 25.84±9.27pg/ml）,IL-17（79.50±16.38 pg/ml vs 48.20±8.74 pg/ml）,IL-37（18.48±6.20 pg/ml vs 10.82±3.26pg/ml）及TIM-3（23.26±8.15ng/ml vs 13.90±4.71ng/ml）水平明显高于轻症组,差异具有统计学意义（t=12.642,14.513,10.205,13.172,均P＜0.001）。结论　血浆IL-6,IL-17,IL-37及TIM-3水平在肺结核患者中明显升高,对判断肺结核严重程度有一定的价值。     

微小RNA-142-3p在脓毒症患者血清中的表达及其临床意义

目的通过观察脓毒症患者血清中微小RNA-142-3p（miR-142-3p）的表达,探讨其与脓毒症的关系。 方法选取41例脓毒症患者作为研究对象,同期住院的非脓毒症患者20例作为对照组。采用实时荧光定量PCR检测血清中miR-142-3p的表达,酶联免疫吸附剂测定（ELISA）检测白细胞介素6（IL-6）和IL-10的表达。采用Spearman相关分析miR-142-3p与患者临床特点和实验室指标的相关性,受试者工作特征（ROC）曲线评价miR-142-3p、IL-6、IL-10、C反应蛋白（CRP）、前降钙素原（PCT）、白细胞计数和乳酸表达水平对脓毒症的预测价值。 结果脓毒症组患者的白细胞计数[（14.4 ± 7.8）× 10⁹/L vs.（8.4 ± 2.1）× 10⁹/L,t = 4.571,P < 0.001]、CRP [（127 ± 80）mg/L vs.（80 ± 45）mg/L,t = 2.436,P= 0.018]、乳酸[（2.3 ± 1.8）mmol/L vs.（1.5 ± 0.6）mmol/L,t = 2.421,P = 0.019]、PCT [5.70（1.49,26.37）μg/L vs. 0.25（0.10,0.63）μg/L,Z= 75.500,P < 0.001]、IL-6 [342.33（64.98,2 618.44）ng/L vs. 14.95（3.21,54.51）ng/L,Z = 84.000,P < 0.001]、IL-10 [23.16（6.19,85.56）ng/L vs. 2.75（1.39,5.36）ng/L,Z = 198.500,P = 0.001]和miR-142-3p [95.74（23.19,278.23）vs. 25.64（18.59,56.05）,Z = 222.000,P = 0.004]均显著高于对照组。miR-142-3p与乳酸、IL-6、PCT均呈正相关（r = 0.427、0.340、0.309,P = 0.005、0.030、0.049）。根据脓毒症患者28 d生存情况分为存活组（29例）和死亡组（12例）。存活组的急性病生理学与长期健康评价（APACHE）Ⅱ评分[（14 ± 6）分vs.（25 ± 6）分]、序贯性器官衰竭估计（SOFA）评分[（6.0 ± 2.8）分vs.（10.7 ± 3.5）分]和乳酸[（1.6 ± 1.0）mmol/L vs.（3.8 ± 2.6）mmol/L]水平均显著低于死亡组（t = 5.406、4.482、2.835,P均< 0.05）。ROC曲线分析结果显示,miR-142-3p [曲线下面积（AUC）= 0.729,95%CI（0.602,0.856）,P = 0.004]、IL-6 [AUC = 0.898,95%CI（0.820,0.975）,P < 0.001]、CRP [AUC = 0.698,95%CI（0.566,0.831）,P = 0.013]、PCT [AUC = 0.908,95%CI（0.835,0.981）,P < 0.001]、IL-10 [AUC = 0.758,95%CI（（0.631,0.885）,P = 0.001]和白细胞计数[AUC = 0.776,95%CI（0.659,0.893）,P = 0.001]对脓毒症均有预测价值。 结论脓毒症患者血清中miR-142-3p的表达升高,且与乳酸、IL-6、PCT呈正相关,其在脓毒症发生发展中可能发挥着重要作用。     

脓毒症患儿血浆miR-455-5p和miR-483-5p检测的临床应用

目的　分析脓毒症（Sepsis）患儿血浆微小核糖核酸（micro RNA,miR）-455-5p和 miR-483-5p检测及其临床价值。方法　选择 2019年 1月～ 2020年 12月三亚市人民医院收治的 108例脓毒症患儿,根据其病情严重程度分为脓毒症非休克组（ n=65）和脓毒症休克组（ n=43）;根据脓毒症患儿 28天的生存情况,将其分为存活组（ n=74）和死亡组（ n=34）,另选取 50例健康儿童作为对照组,检测各组血浆 miR-455-5p和 miR-483-5p表达水平。应用受试者工作特征曲线（ ROC）分析血浆 miR-455-5p,miR-483-5p及降钙素原（ procalcitonin,PCT）水平对脓毒症诊断及预后评估的价值。结果　脓毒症休克组血浆 miR-455-5p（4.06±1.35）,miR-483-5p（3.40±1.13 ）及 PCT（19.97±9.12μg/L）水平均明显高于脓毒症非休克组（ 1.95±0.81,1.38±0.57,5.73±2.36μg/L）和对照组（ 0.78±0.24,0.35±0.10,0.02±0.01μg/L）,差异均有统计学意义（ t=12.985～ 24.638,均 P＜ 0.01）。死亡组血浆 miR-455-5p（4.30±1.52）,miR-483-5p（3.61±1.24）及 PCT（21.35±9.58）水平均明显高于存活组（ 1.74±0.68,1.20±0.45,4.36±1.94μg/L）和对照组,差异均有统计学意义（ t =10.513～ 21.719,均 P＜ 0.01）。ROC曲线分析显示, miR-455-5p,miR-483-5p及 PCT联合诊断脓毒症的曲线下面积（ AUC）最大（ 0.904,95%CI:0.846～ 0.967）,其敏感度和特异度分别为 92.4%和 83.7%。miR-455-5p, miR-483-5p及 PCT联合预测脓毒症患儿死亡的 AUC最大（ 0.928,95%CI:0.870～ 0.984）,其敏感度和特异度分别为 94.7%和 86.5%。结论　脓毒症患儿血浆 miR-455-5p和 miR-483-5p表达水平明显升高,联合 PCT检测有助于提高儿童脓毒症的诊断及预后评估价值。     

新型冠状病毒肺炎患者血浆CRP，PCT和IL-6水平检测的临床诊断价值

目的　评估单独及联合检测新型冠状病毒肺炎(coronavirus disease-2019,COVID-19)患者血浆C反应蛋白（C reactive protein,CRP）、降钙素原（procalcitonin,PCT）和白介素-6(interleukin-6,IL-6)水平的临床诊断价值。方法　选取2020年1 月1日~2月2日期间武汉大学人民医院COVID-19确诊患者96例,其中普通型41例,重型45例和危重型10例,另选40例健康者作为对照组,收集96例患者的CRP,PCT和IL-6以及40例健康者的CRP和PCT检测结果并绘制ROC曲线。结果　与对照组相比,COVID-19组患者的CRP[0.40（0.40~0.57）mg/L vs 60.35（21.00~108.48mg/L）]和PCT[0.05（0.04~0.07）ng/ml vs 0.09（0.05~0.20）ng/ml]水平显著增高,差异有统计学意义（Z=-4.662和-9.202,均P<0.001）。在COVID-19患者中,普通型患者的CRP[36.80（10.20~67.40）mg/L vs 84.90（49.25~134.65）mg/L,94.10（122.18~198.05）mg/L],PCT[0.06（0.04~0.09）ng/ml vs 0.12（0.07~0.27）ng/ml,0.22（0.05~0.47）ng/ml]水平明显低于重型、危重型患者,差异有统计学意义（Z=-4.576~-2.48, 均P<0.05）。普通型患者的IL-6[8.42（1.73~20.59）pg/ml vs 73.65（18.03~311.39）pg/ml]水平低于危重型,差异均有统计学意义 (Z=3.118,P<0.05);ROC曲线显示PCT和CRP诊断COVID-19价值较高,诊断重型和危重型COVID-19患者,CRP的价值最高,且三个指标联合检测可以提高诊断效能;诊断危重型COVID-19患者,IL-6有较高的预测价值。结论　血浆CRP,PCT和IL-6水平可能是诊断COVID-19的潜在生物标志物,并且其血浆水平可以评估COVID-19的严重程度,三指标联合检测可以提高评估效能,对COVID-19的临床诊断和治疗具有重要的参考价值。     

脓毒症患者血清生存素和沉默信息调节因子2 相关酶1 水平与其他血清炎症因子以及预后的关系研究

目的 研究脓毒症患者血清生存素（survivin）、沉默信息调节因子2 相关酶1（silent mating-type informationregulation 2 homologue 1,SIRT1）水平与其他血清炎症因子以及预后的关系。方法 纳入2018 年9 月～ 2021 年2 月东部战区总医院收治的脓毒症患者130 例（脓毒症组）,另选取同期体检的健康志愿者65 例（对照组）。比较两组血清survivin,SIRT1,白细胞介素-1β（interleukin-1β,IL-1β）、白细胞介素-6（interleukin 6,IL-6）、肿瘤坏死因子-α（tumor necrosis factor-α,TNF-α）、C 反应蛋白（C-reactive protein ,CRP）和降钙素原（procalcitonin ,PCT）水平。根据住院期间预后分为生存组（n=92）、死亡组（n=38）,分析血清survivin 和SIRT1 与炎症因子及急性生理和慢性健康状况评分系统Ⅱ（acute physiology and chronic health evaluation Ⅱ,APACHE Ⅱ）、序贯器官功能衰竭（sequentialorgan failure assessment ,SOFA）评分的相关性,绘制受试者工作特征曲线（receiver operating characteristic curve ,ROC）分析血清survivin 和SIRT1 评估预后的曲线下面积（area under the curve ,AUC）。结果 脓毒症组血清survivin（423.04±98.65pg/ml） 和SIRT1（0.59±0.11ng/ml） 水平低于对照组（876.43±124.71 pg/ml,1.95±0.43ng/ml）, 血清IL-1β（13.55±3.21pg/ml）,IL-6（71.56±18.67 pg/ml）,TNF-α（121.18±23.75 pg/ml）,CRP（19.23±2.36mg/dl）和PCT（6.72±1.29ng/ml）水平高于对照组（3.41±0.86pg/ml, 5.32±1.22 pg/ml, 5.93±1.18 pg/ml,4.25±0.99 mg/dl,2.31±0.25 ng/ml）,差异均有统计学意义（t=25.092 ～ 62.243,均P =0.000）。脓毒症患者生存组血清survivin（435.66±49.75pg/ml）和SIRT1（0.63±0.12ng/ml）水平高于死亡组（392.47±53.35 pg/ml, 10.48±0.10ng/ml）,而血清IL-1β（12.14±2.10pg/ml）,IL-6（69.63±10.07 pg/ml）,TNF-α（116.20±9.13 pg/ml）,CRP（18.69±1.82 mg/dl）和PCT（6.33±0.68 ng/ml）水平及APACHEⅡ（13.25±2.64 分）和SOFA评分（5.42±1.20 分）低于死亡组（16.98±1.02pg/ml,76.23±7.64pg/ml,133.23±8.95pg/ml,20.54±1.05mg/dl,7.65±0.36ng/ml,15.88±2.69 分,6.77±1.16 分）,差异均有统计学意义（t=3.629 ～ 17.636,均P=0.000）。Pearson 线性相关分析显示血清survivin 和SIRT1 与血清IL-1β,IL-6,TNF-α,CRP 和PCT 水平及APACHE Ⅱ,SOFA 评分呈负相关（r =-0.584 ～ -0.347,均P ＜ 0.05）。血清survivin 和SIRT1 单独与联合评估脓毒症患者预后的AUC（0.95CI）分别为0.710（0.95CI 0.466 ～ 0.957）,0.756（0.95CI0.540 ～ 0.965）和0.833（0.95CI 0.740 ～ 0.927）。结论 脓毒症患者血清survivin 和SIRT1 水平降低,二者与促炎因子呈负相关,有望成为预测预后的指标。     

创伤性脑损伤患者血清PCT，sTREM-1水平检测联合GCS评分对临床预后评估的价值

目的　探讨创伤性脑损伤（traumatic brain injury,TBI）患者血清降钙素原（procalcitonin,PCT）、可溶性髓样细胞触发受体-1（soluble triggering re ceptor-1,sTREM-1）水平检测联合格拉斯哥昏迷评分（Glasgow comd scale,GCS）对临床预后评估的价值。方法　选取2018年1月～2020年5月涿州市医院收治的TBI患者142例,根据28天预后情况分成存活组（n=110）和死亡组（n=32）。采用格拉斯哥昏迷评分（GCS）分为轻度组（n=10,13~15分）、中度组（n=79,9~12分）和重度组（n=53,3~8分）。比较各组血清PCT及sTREM-1水平,绘制受试者工作特征（ROC）曲线分析PCT,sTREM-1及GCS评分预测TBI患者死亡的价值。结果　死亡组血清PCT（1.91±1.06ng/ml vs 0.48±0.30ng/ml）及sTREM-1（60.28±9.74pg/ml vs 36.50±6.83pg/ml）水平均明显高于存活组,差异均有统计学意义（t=8.284, 8.117,均P<0.01）。重度组血清PCT（1.74±0.95ng/ml vs 0.63±0.38ng/ml）及sTREM-1（53.90±8.32pg/ml vs 42.70±7.26pg/ml）水平均明显高于轻中度组,差异具有统计学意义（t=7.506, 6.974,均P＜0.01）。ROC曲线分析显示,PCT,sTREM-1及GCS评分三项联合预测TBI患者死亡的曲线下面积（0.928,95%CI :0.870～0.991）最大,其敏感度和特异度分别为94.8%和87.0%。结论　血清PCT及sTREM-1水平升高与TBI患者的病情严重程度相关,联合GCS评分对TBI患者预后评估有较好的价值。     

血清PCT，IL-6，SAA，hs-CRP水平联合检测对快速筛查早期血流感染的价值

目的　探讨血清降钙素原（PCT）、 白细胞介素-6（IL-6）、血清淀粉样蛋白A（SAA）及超敏-C反应蛋白（hs-CRP）在快速鉴别早期血流感染中的应用价值。 方法 选取2018年3月～2020年8月血培养阳性患者119例,其中革兰阳性菌感染45例，革兰阴性菌感染72例，选取同时期44例健康体检者作为对照组。收集患者血培养当天的血清标本-80℃冻存备用，检测血清中PCT, IL-6 ,SAA及 hs-CRP水平。用统计分析比较血培养阳性组及健康体检组中四个感染指标水平差异，用受试者工作曲线（ROC）分析四个感染指标在早期血流感染中的诊断价值。结果　血培养阳性组患者血清PCT， IL-6，SAA及hs-CRP水平高于对照组[1.10（0.29，8.27）ng/ml vs 0.01（0.01，0.01）ng/ml, 75.20（33.30, 359.80）pg/ml vs2.00（2.00, 2.00）pg/ml, 148.10（77.15, 200.00）mg/L vs 5.00（5.00, 6.56）mg/L和[93.20(44.23, 158.07)mg/L vs 0.63（0.34,1.32）mg/L]，差异均有统计学意义（Z =-9.213～-9.472，均P<0.001）。ROC曲线分析，PCT, IL-6，SAA及 hs-CRP在诊断血流感染中的曲线下面积（AUC）分别为0.975，0.981，0.965和0.982（P<0.001）。数据分析发现血清PCT及SAA水平在革兰阴性菌组高于革兰阳性菌组[2.04（0.38, 21.60）ng/ml vs 0.60（0.17，2.75）ng/ml, 186.24（90.61，200.00）mg/L vs 104.49(44.94，200.00) mg/L]，差异均有统计学意义（Z = -3.107，-2.688，均P<0.05）。PCT，SAA及PCT联合SAA在鉴别革兰阴性菌与革兰阳性菌感染中的ROC曲线下面积为0.663, 0.644和0.708（均P<0.05）。结论　血清PCT, IL-6，SAA及hs-CRP可以为快速鉴别早期血流感染提供较好的实验依据，尤其PCT与SAA联合在鉴别革兰阴性菌与革兰阳性菌感染中有一定的诊断价值。     

新生儿急性呼吸窘迫综合征患者血清miR-183-5p的表达及与IL-1β，IL-6和TNF-α水平的相关性

目的　探讨新生儿急性呼吸窘迫综合征（acute respiratory distress syndrome, ARDS）患者血清miR-183-5p的表达及其与白细胞介素-1β(IL-1β)、白细胞介素-6（IL-6）及肿瘤坏死因子-α（TNF-α）的相关性。方法　选取保定市第二中心医院收治的87例ARDS新生儿为研究对象。根据ARDS患儿出院时生存情况分为生存组（n=68）和死亡组（n=24）,按照新生儿危重评分结果分为非危重组（n=53,>90 分）、危重组（n=24, 70～90 分）、极危重组（n=15, <70 分）,比较各组血清miR-183-5p,IL-1β,IL-6及TNF-α水平差异。ARDS患儿miR-183-5p与IL-1β,IL-6及TNF-α的相关性采用Pearson相关分析。结果　与生存组比较,死亡组血清miR-183-5p（2.15±0.94 vs 0.96±0.38）,IL-1β（168.20±30.62 vs 110.25±19.30,pg/mL）,IL-6（217.28±44.27 vs 151.30±32.46,pg/mL）及TNF-α（81.16±19.24 vs 48.27±14.30,pg/mL）水平均明显升高（P<0.001）。随着病情加重ARDS患儿血清miR-183-5p,IL-1β,IL-6及TNF-α水平逐渐升高,极危重组>危重组>非危重组（P<0.001）。相关分析显示,ARDS患儿血清miR-183-5p表达水平与IL-1β,IL-6及TNF-α均呈正相关（P<0.001）。结论　ARDS患儿血清miR-183-5p高表达与IL-1β,IL-6,TNF-α水平及病情严重程度相关,可能是预测ARDS患儿病情严重程度的生物学指标。     

脓毒症并发急性肾损伤患儿血清miR-452-3p的水平表达及其临床意义

目的　探讨miR-452-3p在脓毒症并发急性肾损伤（acute kidney injury, AKI）患儿中的表达及其临床意义。方法　选取2018年1月～2020年12月海口市妇幼保健院收治的脓毒症并发AKI患儿106例,根据生存情况分为生存组（n=71）和死亡组（n=35）,检测两组血清miR-452-3p,中性粒细胞明胶酶相关脂质运载蛋白（NGAL）及肾损伤分子-1（KIM-1）水平。应用多因素Logistic回归分析AKI患儿发生死亡的危险因素。绘制ROC曲线分析miR-452-3p,NGAL及KIM-1预测AKI患儿死亡的价值。结果　死亡组血清miR-452-3p（3.92±1.61 vs 2.17±0.95）,NGAL（562.38±53.62mg/L vs 287.46±31.70 mg/ L）及KIM-1（29.15±6.28μg/ L vs 15.96±3.20μg/ L）水平明显高于生存组,差异均有统计学意义（t=18.245,15.117,11.613,均P＜0.001）。多因素Logistic回归分析显示,miR-452-3p（OR=2.583, 95%CI : 1.690~5.374）,NGAL（OR=2.792, 95%CI:1.835~6.153）及KIM-1（OR=1.950, 95%CI:1.274~3.902）水平升高是AKI患儿发生死亡的独立危险因素（P＜0.001）。ROC曲线分析显示,miR-452-3p,NGAL及KIM-1三项联合预测AKI患儿死亡的曲线下面积（0.947,95%CI:0.886~0.991）最大,其敏感度和特异度分别为96.2%和89.5%。结论　miR-452-3p在脓毒症并发AKI患儿中明显升高,联合NGAL及KIM-1预测AKI患儿死亡具有更高的价值。     

急性脑梗死患者血清CCR5 和miR-211-5p 表达水平及其临床意义

目的 探究急性脑梗死（acute cerebral infarction）患者血清CC 趋化因子细胞受体5（chemokine C-C motifreceptor type 5,CCR5）和微小核糖核酸（microRNA,miR）-211-5p 表达水平及其临床意义。方法 选取2019 年2 月~2021 年2 月石家庄平安医院收治的130 例急性脑梗死患者（观察组）,另选同期130 例健康体检者作为对照（对照组）。实时荧光定量PCR 检测血清中CCR5 信使RNA（messengerRNA,mRNA）和miR-211-5p 相对表达水平;酶联免疫吸附试验（enzyme-linked immunosorbent assay,ELISA）法检测血清中CCR5 水平;Pearson 法分析CCR5 mRNA和miR-211-5p 表达水平与美国国立卫生研究院卒中量表（the National Institutes of Health Stroke Scale,NIHSS）评分相关性;分析CCR5 mRNA 和miR-211-5p 表达水平与急性脑梗死患者临床病理特征关系;受试者工作特征（receiveroperating characteristic,ROC）曲线分析CCR5 mRNA 和miR-211-5p 表达水平对急性脑梗死的诊断价值;Kaplan-Meier生存曲线分析CCR5 mRNA 和miR-211-5p 表达水平与急性脑梗死预后生存的关系。结果 与对照组相比,观察组患者血清中CCR5 mRNA 表达（1.49±0.29 vs 1.03±0.24）和蛋白含量水平（290.96±10.35ng/ml vs 152.37±8.97ng/ml）显著增高,miR-211-5p 相对表达水平（0.59±0.18 vs 0.96±0.22）显著降低,差异均有统计学意义（t=13.933,115.374,14.841,均P ＜ 0.001） ;轻度组、中度组、重度组CCR5 mRNA（1.26±0.21,1.58±0.22,1.77±0.24）和蛋白含量水平（257.34±7.26ng/ml,289.31±9.36ng/ml,357.31±8.12ng/ml）依次增加,miR-211-5p 相对表达水平（0.74±0.17,0.61±0.1,0.28±0.18）依次降低,差异均有统计学意义（F=57.145,1 396.953,73.759,均P ＜ 0.001）。急性脑梗死患者CCR5 mRNA 表达水平与miR-211-5p 表达水平呈负相关性（r=-0.341,P<0.001）,与NIHSS 评分呈正相关性（r=0.315,P<0.001）;miR-211-5p 表达水平与NIHSS 评分具有显著的负相关性（r=-0.475,P<0.001）。CCR5 mRNA和miR-211-5p 表达水平与急性脑梗死患者脑梗死体积、OCSP 分型及血脂异常有关（P ＜ 0.05）,与性别、梗死部位无关（P>0.05）。CCR5 mRNA 和miR-211-5p 诊断急性脑梗死的曲线下面积为0.834,0.868,二者联合诊断的曲线下面积为0.921。CCR5 mRNA 高表达患者的90 天生存率显著低于低表达患者（61.97% vs 81.36%）,miR-211-5p 高表达患者的90 天生存率显著高于低表达患者（80.65% vs 61.76%）,差异均有统计学意义（χ2=5.853,5.589,均P ＜ 0.05）。结论 急性脑梗死患者血清CCR5 mRNA 和蛋白表达水平增高,miR-211-5p 表达水平降低,均与患者的病情程度有关,对急性脑梗死有一定诊断价值。     

Discrimination of sepsis and systemic inflammatory response syndrome by determination of circulating plasma concentrations of procalcitonin, protein complement 3a, and interleukin-6

OBJECTIVE: To evaluate whether plasma concentrations of procalcitonin (PCT), interleukin-6 (IL-6), protein complement 3a (C3a), leukocyte elastase (elastase), and the C-reactive protein (CRP) determined directly after the clinical onset of sepsis or systemic inflammatory response syndrome (SIRS) discriminate between patients suffering from sepsis or SIRS and predict the outcome of these patients. DESIGN: Prospective study. SETTING: Medical intensive care unit at a university hospital. PATIENTS: Twenty-two patients with sepsis and 11 patients with SIRS. MEASUREMENTS AND MAIN RESULTS: The plasma concentrations of PCT, C3a, and IL-6 obtained < or =8 hrs after clinical onset of sepsis or SIRS but not those of elastase or CRP were significantly higher in septic patients (PCT: median, 16.8 ng/mL, range, 0.9-351.2 ng/mL, p = .003; C3a: median, 807 ng/mL, range, 422-4788 ng/mL, p < .001; IL-6: median, 382 pg/mL, range, 5-1004 pg/mL, p = .009, all Mann-Whitney rank sum test) compared with patients suffering from SIRS (PCT: median, 3.0 ng/mL, range, 0.7-29.5 ng/mL; C3a: median, 409 ng/mL, range, 279566 ng/mL; IL-6: median, 98 pg/mL, range, 23-586 pg/mL). The power of PCT, C3a, and IL-6 to discriminate between septic and SIRS patients was determined in a receiver operating characteristic analysis. C3a was the best variable to differentiate between both populations with a maximal sensitivity of 86% and a specificity of 80%. An even better discrimination (i.e., a maximal sensitivity of 91% and a specificity of 80%) was achieved when PCT and C3a were combined in a "sepsis score." C3a concentrations also helped to predict the outcome of patients. Based on the sepsis score, a logistic regression model was developed that allows a convenient and reliable determination of the probability of an individual patient to suffer from sepsis or SIRS. CONCLUSIONS: Our data show that the determination of PCT, IL-6, and C3a is more reliable to differentiate between septic and SIRS patients than the variables CRP and elastase, routinely used at the intensive care unit. The determination of PCT and C3a plasma concentrations appears to be helpful for an early assessment of septic and SIRS patients in intensive care.     

外周血炎症因子联合检测在儿童社区获得性肺炎诊断中的临床应用

目的:探讨外周血炎性因子降钙素原(PCT)、C-反应蛋白(CRP)、白介素-6(IL-6)、白细胞(WBC)联合检测在儿童社区获得性肺炎(CAP)诊断中的临床应用价值。方法:选取我院儿科病房收治的103例儿童CAP(病例组)及同期健康体检儿童50例(对照组)为研究对象,电化学发光法检测血清PCT、IL-6、CRP,全自动血液分析仪检测WBC的水平,Pearson相关分析PCT和IL-6与传统炎症指标CRP和WBC的相关性,绘制PCT、IL-6、CRP、WBC“受试者工作特征”(Receiver OperatingCharacteristic)曲线,回顾性统计分析各炎症指标联合检测对儿童CAP的诊断价值。结果:儿童CAP组PCT、CRP、IL-6、WBC水平分别为[(1.371.24)ng/ml、(43.81±15.31)mg/L、(67.87±22.41)pg/ml、(11.253.33)10⁹/L]明显高于健康对照组[(0.33±0.18)ng/ml、(12.06±3.46)mg/L、(8.59±2.89)pg/ml、(7.85±2.99)10⁹/L],均P<0.01;Pearson相关分析PCT、IL-6与CRP和WBC呈明显正相关(r=0.836、0.689、0.686、0.539),均P<0.01;ROC曲线求取PCT、CRP、IL-6和WBC诊断儿童CAP最佳截断值分别为0.50 ng/ml、8.56 mg/L、8.70pg/ml、和8.60×10⁹/L,PCT、CRP、IL-6和WBC诊断儿童CAP敏感性分别为73.79%、98.60%、89.32%和82.52%,特异性86.00%、44.00%、62.00%和60.60%,四项指标联合检测诊断儿童CAP的ROC曲线面积最大(0.917),敏感性、特异性分别为82.52%、84.00%。结论:PCT和IL-6诊断儿童CAP价值优于CRP和WBC,但多指标联合检测可以做到相互补充、相互印证,提高诊断儿童CAP准确度。     

Pancreatic stone protein as an early biomarker predicting mortality in a prospective cohort of patients with sepsis requiring ICU management

ABSTRACT: INTRODUCTION: Biomarkers, such as C-reactive protein [CRP] and procalcitonin [PCT], are insufficiently sensitive or specific to stratify patients with sepsis. We investigate the prognostic value of pancreatic stone protein/regenerating protein (PSP/reg) concentration in patients with severe infections. METHODS: PSP/reg, CRP, PCT, tumor necrosis factor-alpha (TNF-α), interleukin 1 beta (IL1-β), IL-6 and IL-8 were prospectively measured in cohort of patients ≥ 18 years of age with severe sepsis or septic shock within 24 hours of admission in a medico-surgical intensive care unit (ICU) of a community and referral university hospital, and the ability to predict in-hospital mortality was determined. RESULTS: We evaluated 107 patients, 33 with severe sepsis and 74 with septic shock, with in-hospital mortality rates of 6% (2/33) and 25% (17/74), respectively. Plasma concentrations of PSP/reg (343.5 vs. 73.5 ng/ml, P < 0.001), PCT (39.3 vs. 12.0 ng/ml, P < 0.001), IL-8 (682 vs. 184 ng/ml, P < 0.001) and IL-6 (1955 vs. 544 pg/ml, P < 0.01) were significantly higher in patients with septic shock than with severe sepsis. Of note, median PSP/reg was 13.0 ng/ml (IQR: 4.8) in 20 severely burned patients without infection. The area under the ROC curve for PSP/reg (0.65 [95% CI: 0.51 to 0.80]) was higher than for CRP (0.44 [0.29 to 0.60]), PCT 0.46 [0.29 to 0.61]), IL-8 (0.61 [0.43 to 0.77]) or IL-6 (0.59 [0.44 to 0.75]) in predicting in-hospital mortality. In patients with septic shock, PSP/reg was the only biomarker associated with in-hospital mortality (P = 0.049). Risk of mortality increased continuously for each ascending quartile of PSP/reg. CONCLUSIONS: Measurement of PSP/reg concentration within 24 hours of ICU admission may predict in-hospital mortality in patients with septic shock, identifying patients who may benefit most from tailored ICU management.     

Procalcitonin: a valuable indicator of infection in a medical ICU?

OBJECTIVE: To assess the use of procalcitonin (PCT) for the diagnosis of infection in a medical ICU. DESIGN: Prospective, observational study. PATIENTS: Seventy-seven infected patients and 24 patients with systemic inflammatory response syndrome (SIRS) due to other causes. Seventy-five patients could be classified into sepsis (n = 24), severe sepsis (n = 27) and septic shock (n = 24), and 20 SIRS patients remained free from infection during the study. Plasma PCT and C-reactive protein (CRP) levels were evaluated within 48 h of admission (day 0), at day 2 and day 4. RESULTS: As compared with SIRS, PCT and CRP levels at day 0 were higher in infected patients, regardless of the severity of sepsis (25.2 +/- 54.2 ng/ml vs 4.8 +/- 8.7 ng/ml; 159 +/- 92 mg/l vs 71 +/- 58 mg/l, respectively). At cut-off values of 2 ng/ml (PCT) and 100 mg/l (CRP), sensitivity and specificity were 65% and 70% (PCT), 74% and 74% (CRP). PCT and CRP levels were significantly more elevated in septic shock (38.5 +/- 59.1 ng/ml and 173 +/- 98 mg/l) than in SIRS (3.8 +/- 6.9 ng/ml and 70 +/- 48 mg/l), sepsis (1.3 +/- 2.7 ng/ml and 98 +/- 76 mg/l) and severe sepsis (9.1 +/- 18. 2 ng/ml and 145 +/- 70 mg/l) (all p = 0.005). CRP, but not PCT, levels were more elevated in severe sepsis than in SIRS (p<0.0001). Higher PCT levels in the patients with four dysfunctional organs and higher PCT and CRP levels in nonsurvivors may only reflect the marked inflammatory response to septic shock. CONCLUSION: In this study, PCT and CRP had poor sensitivity and specificity for the diagnosis of infection. PCT did not clearly discriminate SIRS from sepsis or severe sepsis.