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Choi J, Schmerk CL, Mele TS, Rudak PT, Wardell CM, Deng G, Pavri FR, Kim K, Cepinskas G, He W, Haeryfar SM. Longitudinal analysis of mucosa-associated invariant T cells in sepsis reveals their early numerical decline with prognostic implications and a progressive loss of antimicrobial functions. Immunol Cell Biol 2023; 101:249-261. [PMID: 36604951 DOI: 10.1111/imcb.12619] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 11/24/2022] [Accepted: 01/03/2023] [Indexed: 01/07/2023]
Abstract
Sepsis-elicited immunosuppression elevates the risk of secondary infections. We used a clinically relevant mouse model and serial peripheral blood samples from patients to assess the antimicrobial activities of mucosa-associated invariant T (MAIT) cells in sepsis. Hepatic and splenic MAIT cells from B6-MAITCAST mice displayed increased CD69 expression and a robust interferon-γ (IFNγ) production capacity shortly after sublethal cecal ligation and puncture, but not at a late timepoint. Peripheral blood MAIT cell frequencies were reduced in septic patients at the time of intensive care unit (ICU) admission, and more dramatically so among nonsurvivors, suggesting the predictive usefulness of early MAIT cell enumeration. In addition, at ICU admission, MAIT cells from sepsis survivors launched stronger IFNγ responses to several bacterial species compared with those from patients who subsequently died of sepsis. Of note, while low human leukocyte antigen (HLA)-DR+ monocyte frequencies, widely regarded as a surrogate indicator of sepsis-induced immunosuppression, were gradually corrected, the numerical insufficiency of MAIT cells was not resolved over time, and their CD69 expression continued to decline. MAIT cell responses to bacterial pathogens, a major histocompatibility complex-related protein 1 (MR1) ligand, and interleukin (IL)-12 and IL-18 were also progressively lost during sepsis and did not recover by the time of ICU/hospital discharge. We propose that MAIT cell dysfunctions contribute to post-sepsis immunosuppression.
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Affiliation(s)
- Joshua Choi
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Crystal L Schmerk
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Tina S Mele
- Division of Critical Care Medicine, Department of Medicine, Western University, London, Ontario, Canada.,Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
| | - Patrick T Rudak
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Christine M Wardell
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Gansen Deng
- Department of Statistical and Actuarial Sciences, Western University, London, Ontario, Canada
| | - Farzan R Pavri
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Kyoungok Kim
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Gediminas Cepinskas
- Centre for Critical Illness Research, Lawson Health Research Institute, London, Ontario, Canada.,Department of Medical Biophysics, Western University, London, Ontario, Canada
| | - Wenqing He
- Department of Statistical and Actuarial Sciences, Western University, London, Ontario, Canada
| | - Sm Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada.,Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada.,Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Ontario, Canada
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Haeryfar SMM. Finding a Mentor While "Storm" Chasing with Howard Young. J Interferon Cytokine Res 2022; 42:658-661. [PMID: 36070592 DOI: 10.1089/jir.2022.0157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Canada.,Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Canada.,Division of General Surgery, Department of Surgery, Western University, London, Canada.,Lawson Health Research Institute, London, Canada
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Li YQ, Yan C, Wang XF, Xian MY, Zou GQ, Gao XF, Luo R, Liu Z. A New iNKT-Cell Agonist-Adjuvanted SARS-CoV-2 Subunit Vaccine Elicits Robust Neutralizing Antibody Responses. ACS Infect Dis 2022; 8:2161-2170. [PMID: 36043698 DOI: 10.1021/acsinfecdis.2c00296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Adjuvants are essential components of vaccines. Invariant natural killer T (iNKT) cells are a distinct subset of T cells that function to bridge the innate and adaptive immunities and are capable of mediating strong and rapid responses to a range of diseases, including cancer and infectious disease. An increasing amount of evidence suggests that iNKT cells can help fight viral infection. In particular, iNKT-secreting IL-4 is a key mediator of humoral immunity and has a positive correlation with the levels of neutralizing antibodies. As iNKT cell agonists, αGC glycolipid (α-galactosylceramide, or KRN7000) and its analogues as vaccine adjuvants have begun to provide vaccinologists with a new toolset. Herein we found that a new iNKT-cell agonist αGC-CPOEt elicited a strong cytokine response with increased IL-4 production. Remarkably, after three immunizations, SARS-CoV-2 RBD-Fc adjuvanted by αGC-CPOEt evoked robust neutralizing antibody responses that were about 5.5-fold more than those induced by αGC/RBD-Fc and 25-fold greater than those induced by unadjuvanted RBD-Fc. These findings imply that αGC-CPOEt could be investigated further as a new COVID-19 vaccine adjuvant to prevent current and future infectious disease outbreaks.
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Affiliation(s)
- Ya-Qian Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Cheng Yan
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, PR China
| | - Xi-Feng Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, PR China
| | - Mao-Ying Xian
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, PR China
| | - Guo-Qing Zou
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, PR China
| | - Xiao-Fei Gao
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang, Jiangxi 330013, PR China
| | - Rui Luo
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Zheng Liu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, PR China
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