Clinical diagnostic utility of IP-10 and LAM antigen levels for the diagnosis of tuberculous pleural effusions in a high burden setting.

Clinical diagnostic utility of IP-10 and LAM antigen levels for the diagnosis of tuberculous pleural effusions in a high burden setting.
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IP-10和LAM抗原水平的临床诊断效用,用于在高负担设置下进行结核性胸腔积液。

DOI:
10.1371/journal.pone.0004689
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发表时间:
2009
期刊:
影响因子:
3.7
通讯作者:
Zumla A
Zumla A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Dheda K;Van-Zyl Smit RN;Sechi LA;Badri M;Meldau R;Symons G;Khalfey H;Carr I;Maredza A;Dawson R;Wainright H;Whitelaw A;Bateman ED;Zumla A

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目前诊断结核性胸腔积液的工具并不理想。有关新诊断技术价值的数据有限,特别是在高负担环境中。初步病例对照研究已确定 IFN-γ-诱导型 10kDa 蛋白 (IP-10) 是一种有前途的诊断标记物;然而,其在日常临床环境中的诊断效用尚不清楚。之前尚未在胸水中评估 LAM 抗原的检测。我们研究了现有技术(腺苷脱氨酶 [ADA])、最新技术(标准化核酸扩增测试 [NAAT])和新技术(标准化 LAM 分枝杆菌抗原检测测定和 IP-10 水平)在评估 78 名连续招募的南非结核病嫌疑人的胸腔积液方面的比较诊断效用。除非有禁忌或拒绝,所有同意的参与者都接受了胸膜活检。参考标准包括结核分枝杆菌培养阳性或提示结核病的组织学阳性。在 74 名可评估受试者中,分别有 48 名、7 名和 19 名患有确诊、可能和非结核病。结核病参与者的 IP-10 水平显着高于非结核病参与者 (p<0.0001)。不同诊断方式的各自结果[敏感性、特异性、PPV、NPV %] 为: ADA 为 30 IU/L 临界点 [96; 69; 90; 85],NAAT [6; 93; 67; 28],IP-10 处于 28,170 pg/ml ROC 衍生的临界点 [80; 82; 91; 64],以及 4035 pg/ml 临界点的 IP-10 [100; 53; 83; 100]。因此,IP-10 使用 ROC 派生的切点,漏诊了约 20% 的结核病例,误诊了约 20% 的非结核病例。相比之下,当使用较低的切点时,阴性测试可排除结核病。 NAAT 的敏感性较差,但特异性较高。 LAM 抗原检测在诊断上没有用处。尽管 IP-10 与 ADA 一样具有次优特异性,但它可能是临床上有用的结核性胸腔积液排除测试。现在需要更大规模的多中心研究来证实我们的发现。
Current tools for the diagnosis of tuberculosis pleural effusions are sub-optimal. Data about the value of new diagnostic technologies are limited, particularly, in high burden settings. Preliminary case control studies have identified IFN-γ-inducible-10kDa protein (IP-10) as a promising diagnostic marker; however, its diagnostic utility in a day-to-day clinical setting is unclear. Detection of LAM antigen has not previously been evaluated in pleural fluid. We investigated the comparative diagnostic utility of established (adenosine deaminase [ADA]), more recent (standardized nucleic-acid-amplification-test [NAAT]) and newer technologies (a standardized LAM mycobacterial antigen-detection assay and IP-10 levels) for the evaluation of pleural effusions in 78 consecutively recruited South African tuberculosis suspects. All consenting participants underwent pleural biopsy unless contra-indicated or refused. The reference standard comprised culture positivity for M. tuberculosis or histology suggestive of tuberculosis. Of 74 evaluable subjects 48, 7 and 19 had definite, probable and non-TB, respectively. IP-10 levels were significantly higher in TB vs non-TB participants (p<0.0001). The respective outcomes [sensitivity, specificity, PPV, NPV %] for the different diagnostic modalities were: ADA at the 30 IU/L cut-point [96; 69; 90; 85], NAAT [6; 93; 67; 28], IP-10 at the 28,170 pg/ml ROC-derived cut-point [80; 82; 91; 64], and IP-10 at the 4035 pg/ml cut-point [100; 53; 83; 100]. Thus IP-10, using the ROC-derived cut-point, missed ∼20% of TB cases and mis-diagnosed ∼20% of non-TB cases. By contrast, when a lower cut-point was used a negative test excluded TB. The NAAT had a poor sensitivity but high specificity. LAM antigen-detection was not diagnostically useful. Although IP-10, like ADA, has sub-optimal specificity, it may be a clinically useful rule-out test for tuberculous pleural effusions. Larger multi-centric studies are now required to confirm our findings.
人类肠上皮细胞系中IL-1BETA和IFN-GAMMA对CXCL10基因表达的NF-KAPPAB依赖性协同调节。
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