دورية أكاديمية
Heterogenous expansion of polymorphonuclear myeloid-derived suppressor cells distinguishes high-risk sepsis immunophenotypes in Uganda.
| العنوان: | Heterogenous expansion of polymorphonuclear myeloid-derived suppressor cells distinguishes high-risk sepsis immunophenotypes in Uganda. |
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| المؤلفون: | Cummings MJ, Guichard V; Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA., Owor N; Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda., Ochar T; Tororo General Hospital, Ministry of Health, Tororo, Uganda., Kiwubeyi M; Tororo General Hospital, Ministry of Health, Tororo, Uganda., Nankwanga R; Tororo General Hospital, Ministry of Health, Tororo, Uganda., Kibisi R; Tororo General Hospital, Ministry of Health, Tororo, Uganda., Kassaja C; Tororo General Hospital, Ministry of Health, Tororo, Uganda., Ross JE; Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA., Postler TS; Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA., Kayiwa J; Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda., Reynolds SJ, Nakibuuka MC; Rakai Health Sciences Program, Kalisizo, Uganda., Nakaseegu J; Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda., Lutwama JJ; Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, Entebbe, Uganda., Lipkin WI, Ghosh S; Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA., Bakamutumaho B, O'Donnell MR |
| المصدر: | Shock (Augusta, Ga.) [Shock] 2024 May 30. Date of Electronic Publication: 2024 May 30. |
| Publication Model: | Ahead of Print |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 9421564 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1540-0514 (Electronic) Linking ISSN: 10732322 NLM ISO Abbreviation: Shock Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2002- : Philadelphia : Lippincott Williams & Wilkins Original Publication: Augusta, GA : BioMedical Press, [1994- |
| مستخلص: | Background: Understanding of immune cell phenotypes associated with inflammatory and immunosuppressive host responses in sepsis is imprecise, particularly in low- and middle-income countries (LMICs), where the global sepsis burden is concentrated. In these settings, elucidation of immunophenotypes with prognostic importance is necessary to determine the relevance of emerging therapeutics and refine mechanistic investigations of sepsis immunopathology. Methods: In a prospective cohort of adults hospitalized with suspected sepsis in Uganda (N = 43; median age 46 years [IQR 36-59], 24 [55.8%] living with HIV, 16 [37.2%] deceased at 60 days), we combined high-dimensional flow cytometry with unsupervised machine learning and manual gating to define peripheral immunophenotypes associated with increased risk of 60-day mortality. Results: Patients who died showed heterogenous expansion of polymorphonuclear myeloid-derived suppressor cells (PMN-MDSCs), with increased and decreased abundance of CD16negPD-L1dim and CD16brightPD-L1bright subsets, respectively, significantly associated with mortality. While differences between CD16negPD-L1dim cell abundance and mortality risk appeared consistent throughout the course of illness, those for the CD16brightPD-L1bright subset were more pronounced early after illness onset. Independent of HIV co-infection, depletion of CD4+ T cells, dendritic cells, and CD56-CD16bright NK cells were significantly associated with mortality risk, as was expansion of immature, CD56+CD16-CD11c+ NK cells. Abundance of T cells expressing inhibitory checkpoint proteins (PD-1, CTLA-4, LAG3) was similar between patients who died versus those who survived. Conclusions: This is the first study to define high risk immunophenotypes among adults with sepsis in sub-Saharan Africa, an immunologically distinct region where biologically informed treatment strategies are needed. More broadly, our findings highlight the clinical importance and complexity of MDSC expansion during sepsis and support emerging data that suggest a host-protective role for PD-L1 myeloid checkpoints in acute critical illness. (Copyright © 2024 by the Shock Society.) |
| تواريخ الأحداث: | Date Created: 20240716 Latest Revision: 20240716 |
| رمز التحديث: | 20240717 |
| DOI: | 10.1097/SHK.0000000000002403 |
| PMID: | 39012778 |
| قاعدة البيانات: | MEDLINE |
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