Christian Krautz1, Sarah L Maier2, Maximilian Brunner1, Melanie Langheinrich1, Evangelos J Giamarellos-Bourboulis3, Charalambos Gogos4, Apostolos Armaganidis5, Frank Kunath6, Robert Grützmann1, Georg F Weber7. 1. Department of Surgery, Universitätsklinikum Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany. 2. Clinic of Pediatric Oncology and Hematology, Division of Pediatric Stem Cell Transplantation and Immunology, University Medical Centre Hamburg-Eppendorf, Germany. 3. 4th Department of Internal Medicine, University of Athens, Medical School, Greece; Hellenic Sepsis Study Group, University of Patras, Medical School, Greece. 4. Hellenic Sepsis Study Group, University of Patras, Medical School, Greece; Department of Internal Medicine, University of Patras, Medical School, Greece. 5. Hellenic Sepsis Study Group, University of Patras, Medical School, Greece; 2nd Department of Critical Care Medicine, University of Athens, Medical School, Greece. 6. Department of Urology, University Hospital Erlangen, Erlangen, Germany; UroEvidence@Deutsche Gesellschaft für Urologie, Berlin, Germany. 7. Department of Surgery, Universitätsklinikum Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany. Electronic address: georg.weber@uk-erlangen.de.
Abstract
BACKGROUND: B cell function and antibody production are crucial factors in host protection during inflammation. We aimed to synthesize the available evidence on the association between the reduction of circulating B cells and plasma immunoglobulin (IgM) levels and decreased survival during sepsis. METHODS: We performed a systematic search in PubMed, Embase, ISI Web of Knowledge, Cochrane Central Register of Controlled Trials, BioMed Central, and Science Direct. We selected studies with data on circulating B cells and plasma IgM levels within the initial 24 h after sepsis onset. RESULTS: In total nine studies (n = 992 patients) were identified. Circulating B cells were reduced in septic patients as compared to non-septic patients (mean difference [MD] -88.2 cells/μl; 95% confidence interval [CI] -148.6--27.9). Sepsis non-survivors showed a significant reduction of circulating B cells and IgM levels compared to sepsis survivors (MD -77.1 cells/μl; 95% CI -111.4--42.7 and MD -20.9 mg/dl; 95% CI -33.8--8.0, respectively). CONCLUSIONS: Our results suggest that a reduction of circulating B cells and IgM levels at sepsis onset are associated with decreased sepsis survival. However, due to methodological limitations and the risk of bias, we need further prospective studies to confirm this association. REGISTRATION: The protocol was registered (PROSPERO 2016:CRD42016053184).
BACKGROUND: B cell function and antibody production are crucial factors in host protection during inflammation. We aimed to synthesize the available evidence on the association between the reduction of circulating B cells and plasma immunoglobulin (IgM) levels and decreased survival during sepsis. METHODS: We performed a systematic search in PubMed, Embase, ISI Web of Knowledge, Cochrane Central Register of Controlled Trials, BioMed Central, and Science Direct. We selected studies with data on circulating B cells and plasma IgM levels within the initial 24 h after sepsis onset. RESULTS: In total nine studies (n = 992 patients) were identified. Circulating B cells were reduced in septic patients as compared to non-septic patients (mean difference [MD] -88.2 cells/μl; 95% confidence interval [CI] -148.6--27.9). Sepsis non-survivors showed a significant reduction of circulating B cells and IgM levels compared to sepsis survivors (MD -77.1 cells/μl; 95% CI -111.4--42.7 and MD -20.9 mg/dl; 95% CI -33.8--8.0, respectively). CONCLUSIONS: Our results suggest that a reduction of circulating B cells and IgM levels at sepsis onset are associated with decreased sepsis survival. However, due to methodological limitations and the risk of bias, we need further prospective studies to confirm this association. REGISTRATION: The protocol was registered (PROSPERO 2016:CRD42016053184).
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