Severe sepsis: Low expression of the renin-angiotensin system is associated with poor prognosis

Zhang,Wei; Chen,Xiaowei; Huang,Ling; Lu,Ning; Zhou,Lei; Wu,Guojie; Chen,Yuguo

doi:10.3892/etm.2014.1566

Severe sepsis: Low expression of the renin-angiotensin system is associated with poor prognosis

Authors:
- Wei Zhang
- Xiaowei Chen
- Ling Huang
- Ning Lu
- Lei Zhou
- Guojie Wu
- Yuguo Chen
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Affiliations: Department of Emergency, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China, Intensive Care Unit, Yantaishan Hospital, Yantai, Shandong 264001, P.R. China
Published online on: February 20, 2014 https://doi.org/10.3892/etm.2014.1566
Pages: 1342-1348

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Abstract

Severe sepsis has a high fatality rate, but no clinical indices for prognosis have been established. In recent years, the renin-angiotensin system (RAS) has received considerable attention. However, clinical data on RAS are inconsistent. Therefore, the aim of the present study was to assess the significance of RAS in the prognosis of sepsis. Blood samples were collected from patients, who met the diagnostic criteria of severe sepsis, on day 1 (D1) and 3 (D3). For each sample, the levels of angiotensin II (AngII), angiotensin‑converting enzyme (ACE) and additional indices were measured. Patients were monitored for 28 days. On the D1 of inclusion, the average Acute Physiology and Chronic Health Evaluation II (APACHE II) score was 22.2 and the Sepsis-related Organ Failure Assessment (SOFA) score was 6.1. Logistic regression analysis revealed that mortality‑associated variables included the APACHE II score on D1, the SOFA score on D1, high lactic acid levels on D3 and low AngII and ACE levels on D1 and D3. AngII levels (<86.1 ng/ml) on D1 had a sensitivity of 88.2% and specificity of 77.3% for predicting mortality. ACE levels (<39.2 ng/ml) on D1 had a sensitivity of 88.2% and specificity of 72.7% for predicting mortality. These two indices were better than the APACHE II and SOFA scores. Therefore, low expression levels of AngII and ACE are valuable in predicting the mortality of patients with severe sepsis.

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