Transcriptional pathways of terminal differentiation in high- and low-density blood granulocytes in sepsis [research data]
Background - Trauma and infection induce emergency granulopoiesis. Counts of immature granulocytes and transcriptional pathways of terminal granulocytic differentiation in blood are elevated in sepsis but correlate with disease severity. This limits their performance as sepsis biomarkers in critical...
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| Main Authors: | , , , , , , , , |
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| Format: | Database Research Data |
| Language: | English |
| Published: |
Heidelberg
Universität
2024-10-17
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| DOI: | 10.11588/data/JRWPFV |
| Subjects: | |
| Online Access: | Resolving-System, kostenfrei, Volltext: https://doi.org/10.11588/data/JRWPFV Verlag, kostenfrei, Volltext: https://heidata.uni-heidelberg.de/dataset.xhtml?persistentId=doi:10.11588/data/JRWPFV 
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| Author Notes: | Holger A. Lindner, Tobias Günther, Anna Coulibaly, Sonia Y. Velásquez, Jutta Schulte, Tanja Fuderer, Timo Sturm, Bianka Hahn, Manfred Thiel |
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| 245 | 1 | 0 | |a Transcriptional pathways of terminal differentiation in high- and low-density blood granulocytes in sepsis [research data] |c Holger A. Lindner, Tobias Günther, Anna Coulibaly, Sonia Y. Velásquez, Jutta Schulte, Tanja Fuderer, Timo Sturm, Bianka Hahn, Manfred Thiel |
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| 520 | |a Background - Trauma and infection induce emergency granulopoiesis. Counts of immature granulocytes and transcriptional pathways of terminal granulocytic differentiation in blood are elevated in sepsis but correlate with disease severity. This limits their performance as sepsis biomarkers in critically ill patients. We hypothesized that activation of these pathways in sepsis is attributable to immature low-density (LD) rather than mature high-density (HD) granulocytes. Methods - We included patients with sepsis and systemic inflammatory response syndrome (SIRS) of comparable disease severity, and additionally septic shock, on intensive or intermediate care unit admission. Blood granulocyte isolation by CD15 MicroBeads was followed by density-gradient centrifugation. Flow cytometry was used to determine counts of developmental stages in blood and their relative abundancies in total, HD, and LD granulocytes. Five degranulation markers were quantified in plasma by multiplex immunoassays. A set of 135 genes mapping granulocyte differentiation was assayed by QuantiGeneTM Plex. CEACAM4, PLAC8, and CD63 were analyzed by qRT-PCR. Nonparametric statistical tests were applied. Results - Precursor counts appeared higher in sepsis than SIRS but did not correlate with disease severity for early immature and mature granulocytes. Precursor subpopulations were enriched at least ten-fold in LD over HD granulocytes without sepsis-SIRS differences. Degranulation markers in blood were comparable in sepsis and SIRS. Higher expression of early developmental genes in sepsis than SIRS was more pronounced in LD and less in HD than total granulocytes. Only the cell membrane proteins CXCR2 and CEACAM4 were more highly expressed in SIRS than sepsis. By qRT-PCR, the azurophilic granule genes CD63 and PLAC8 showed higher sepsis than SIRS levels in LD granulocytes and PLAC8 also in total granulocytes where its discriminatory performance resembled C-reactive protein (CRP). Conclusions - Transcriptional programs of early terminal granulocytic differentiation distinguish sepsis from SIRS due to both higher counts of immature granulocytes and elevated activity of early developmental genes in sepsis. The sustained activity of PLAC8 in mature granulocytes likely accounts for its selection in the whole blood SeptiCyteTM LAB test. Total granulocyte PLAC8 rivals CRP as sepsis biomarker. However, infection-specific transcriptional pathways, that differentiate sepsis from sterile stress-induced granulocytosis more reliably than CRP, remain to be identified. (2024-09-08) | ||
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