RT Journal Article SR Electronic T1 The protective association of endogenous immunoglobulins against sepsis mortality is restricted to patients with moderate organ failure JF bioRxiv FD Cold Spring Harbor Laboratory SP 116665 DO 10.1101/116665 A1 Ignacio Martin-Loeches A1 Arturo Muriel-Bombín A1 Ricard Ferrer A1 Antonio Artigas A1 Jordi Sole-Violan A1 Leonardo Lorente A1 David Andaluz-Ojeda A1 Adriele Prina-Mello A1 Ruben Herrán-Monge A1 Borja Suberviola A1 Ana Rodriguez-Fernandez A1 Pedro Merino A1 Ana M Loza A1 Pablo Garcia-Olivares A1 Eduardo Anton A1 Eduardo Tamayo A1 Wysali Trapiello A1 Jesús Blanco A1 Jesús F Bermejo-Martin A1 GRECIA Group YR 2017 UL http://biorxiv.org/content/early/2017/03/14/116665.abstract AB Background pre-evaluation of endogenous immunoglobulin levels is a potential strategy to improve the results of intravenous immunoglobulins in sepsis, but more work has to be done to identify those patients who could benefit the most from this treatment. The objective of this study was to evaluate the impact of endogenous immunoglobulins on the mortality risk in sepsis depending on disease severity.Methods this was a retrospective observational study including 278 patients admitted to the ICU with sepsis fulfilling the SEPSIS-3 criteria, coming from the Spanish GRECIA and ABISS-EDUSEPSIS cohorts. Patients were distributed into two groups depending on their Sequential Organ Failure Assessment score al ICU admission (SOFA < 8, n = 122 and SOFA ≥ 8, n = 156) and the association between immunoglobulin levels at ICU admission with mortality was studied in each group by Kaplan Meier and multivariate logistic regression analysis.Results ICU / hospital mortality in the SOFA < 8 group was 14.8% / 23.0%, compared to 30.1 % / 35.3% in the SOFA ≥ 8 group. In the group with SOFA < 8, the simultaneous presence of total IgG <407 mg/dl, IgM < 43 mg/dl and IgA < 219 mg/dl was associated to a reduction in the survival mean time of 6.6 days in the first 28 days, and was a robust predictor of mortality risk either during the acute and the post-acute phase of the disease (OR for ICU mortality: 13.79; OR for hospital mortality: 7.98). This predictive ability remained in the absence of prior immunosupression (OR for ICU mortality: 17.53; OR for hospital mortality: 5.63). Total IgG <407 mg/dl or IgG1 < 332 mg/dl was also an independent predictor of ICU mortality in this group. In contrast, in the SOFA ≥ 8 group, we found no immunoglobulin thresholds associated to neither ICU nor to hospital mortality.Conclusions endogenous immunoglobulin levels may have a different impact on the mortality risk of sepsis patients based on their severity. In patients with moderate organ failure, the simultaneous presence of low levels of IgG, IgA and IgM was a consistent predictor of both acute and post-acute mortality.ABISS-EdusepsisAntiBiotic Intervention in Severe SepsisAPACHE-IIAcute Physiology and Chronic Health Evaluation II scoreGRECIAGrupo de Estudios y Análisis en Cuidados Intensivos.IVIGintravenous immunoglobulinISC IgGAMimmunoscore combining IgG, IgA, IgMISC IgGMimmunoscore combining IgG, IgMISC IgGAimmunoscore combining IgG, IgAISC IgMAimmunoscore combining IgM, IgA.SBITsScore-based immunoglobulin G therapy of patients with sepsisSOFASequential Organ Failure Assessment score