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Li C, Ture SK, Nieves-Lopez B, Blick-Nitko SK, Maurya P, Livada AC, Stahl TJ, Kim M, Pietropaoli AP, Morrell CN. Thrombocytopenia Independently Leads to Changes in Monocyte Immune Function. Circ Res 2024; 134:970-986. [PMID: 38456277 PMCID: PMC11069346 DOI: 10.1161/circresaha.123.323662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 02/26/2024] [Indexed: 03/09/2024]
Abstract
BACKGROUND While platelets have well-studied hemostatic functions, platelets are immune cells that circulate at the interface between the vascular wall and white blood cells. The physiological implications of these constant transient interactions are poorly understood. Activated platelets induce and amplify immune responses, but platelets may also maintain immune homeostasis in healthy conditions, including maintaining vascular integrity and T helper cell differentiation, meaning that platelets are central to both immune responses and immune quiescence. Clinical data have shown an association between low platelet counts (thrombocytopenia) and immune dysfunction in patients with sepsis and extracorporeal membrane oxygenation, further implicating platelets as more holistic immune regulators, but studies of platelet immune functions in nondisease contexts have had limited study. METHODS We used in vivo models of thrombocytopenia and in vitro models of platelet and monocyte interactions, as well as RNA-seq and ATAC-seq (assay for transposase-accessible chromatin with sequencing), to mechanistically determine how resting platelet and monocyte interactions immune program monocytes. RESULTS Circulating platelets and monocytes interact in a CD47-dependent manner to regulate monocyte metabolism, histone methylation, and gene expression. Resting platelet-monocyte interactions limit TLR (toll-like receptor) signaling responses in healthy conditions in an innate immune training-like manner. In both human patients with sepsis and mouse sepsis models, thrombocytopenia exacerbated monocyte immune dysfunction, including increased cytokine production. CONCLUSIONS Thrombocytopenia immune programs monocytes in a manner that may lead to immune dysfunction in the context of sepsis. This is the first demonstration that sterile, endogenous cell interactions between resting platelets and monocytes regulate monocyte metabolism and pathogen responses, demonstrating platelets to be immune rheostats in both health and disease.
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Affiliation(s)
- Chen Li
- Aab Cardiovascular Research Institute (C.L., S.K.T., B.N.-L., S.K.B.-N., P.M., A.C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Sara K Ture
- Aab Cardiovascular Research Institute (C.L., S.K.T., B.N.-L., S.K.B.-N., P.M., A.C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Benjamin Nieves-Lopez
- Aab Cardiovascular Research Institute (C.L., S.K.T., B.N.-L., S.K.B.-N., P.M., A.C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- University of Puerto Rico, Medical Sciences Campus, San Juan (B.N.-L.)
| | - Sara K Blick-Nitko
- Aab Cardiovascular Research Institute (C.L., S.K.T., B.N.-L., S.K.B.-N., P.M., A.C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Preeti Maurya
- Aab Cardiovascular Research Institute (C.L., S.K.T., B.N.-L., S.K.B.-N., P.M., A.C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Alison C Livada
- Aab Cardiovascular Research Institute (C.L., S.K.T., B.N.-L., S.K.B.-N., P.M., A.C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Tyler J Stahl
- Genomics Research Center (T.J.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Minsoo Kim
- Department of Microbiology and Immunology (M.K., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Anthony P Pietropaoli
- Department of Medicine (A.P.P., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Craig N Morrell
- Aab Cardiovascular Research Institute (C.L., S.K.T., B.N.-L., S.K.B.-N., P.M., A.C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- Department of Microbiology and Immunology (M.K., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- Department of Medicine (A.P.P., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- Department of Pathology and Laboratory Medicine (C.N.M.), University of Rochester School of Medicine and Dentistry, NY
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Li C, Ture SK, Nieves-Lopez B, Blick-Nitko SK, Maurya P, Livada AC, Stahl TJ, Kim M, Pietropaoli AP, Morrell CN. Thrombocytopenia Independently Leads to Monocyte Immune Dysfunction. bioRxiv 2023:2023.05.10.540214. [PMID: 37214993 PMCID: PMC10197656 DOI: 10.1101/2023.05.10.540214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In addition to their well-studied hemostatic functions, platelets are immune cells. Platelets circulate at the interface between the vascular wall and leukocytes, and transient platelet-leukocyte complexes are found in both healthy and disease states, positioning platelets to provide physiologic cues of vascular health and injury. Roles for activated platelets in inducing and amplifying immune responses have received an increasing amount of research attention, but our past studies also showed that normal platelet counts are needed in healthy conditions to maintain immune homeostasis. We have now found that thrombocytopenia (a low platelet count) leads to monocyte dysfunction, independent of the cause of thrombocytopenia, in a manner that is dependent on direct platelet-monocyte CD47 interactions that regulate monocyte immunometabolism and gene expression. Compared to monocytes from mice with normal platelet counts, monocytes from thrombocytopenic mice had increased toll-like receptor (TLR) responses, including increased IL-6 production. Furthermore, ex vivo co-incubation of resting platelets with platelet naïve bone marrow monocytes, induced monocyte metabolic programming and durable changes in TLR agonist responses. Assay for transposase-accessible chromatin with high-throughput sequencing (ATAC-Seq) on monocytes from thrombocytopenic mice showed persistently open chromatin at LPS response genes and resting platelet interactions with monocytes induced histone methylation in a CD47 dependent manner. Using mouse models of thrombocytopenia and sepsis, normal platelet numbers were needed to limit monocyte immune dysregulation and IL6 expression in monocytes from human patients with sepsis also inversely correlated with patient platelet counts. Our studies demonstrate that in healthy conditions, resting platelets maintain monocyte immune tolerance by regulating monocyte immunometabolic processes that lead to epigenetic changes in TLR-related genes. This is also the first demonstration of sterile cell interactions that regulate of innate immune-metabolism and monocyte pathogen responses.
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Pinney JJ, Blick-Nitko SK, Baran AM, Peterson DR, Whitehead HE, Izumi R, Munugalavadla V, Van DerMeid KR, Barr PM, Zent CS, Elliott MR, Chu CC. The highly selective Bruton tyrosine kinase inhibitor acalabrutinib leaves macrophage phagocytosis intact. Haematologica 2022; 107:1460-1465. [PMID: 35172559 PMCID: PMC9152969 DOI: 10.3324/haematol.2021.279560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Indexed: 11/09/2022] Open
Abstract
Not available.
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Affiliation(s)
- Jonathan J Pinney
- Center for Vaccine Biology and Immunology; Department of Microbiology and Immunology, University of Rochester, Rochester, NY
| | - Sara K Blick-Nitko
- Department of Pathology and Laboratory Medicine, University of Rochester, Rochester, NY
| | - Andrea M Baran
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY
| | - Derick R Peterson
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY
| | - Hannah E Whitehead
- Center for Vaccine Biology and Immunology; Department of Microbiology and Immunology, University of Rochester, Rochester, NY
| | - Raquel Izumi
- Acerta Pharma, a member of the AstraZeneca Group, South San Francisco, CA
| | | | - Karl R Van DerMeid
- Department of Medicine; Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY
| | - Paul M Barr
- Department of Medicine; Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY
| | - Clive S Zent
- Department of Medicine; Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY
| | - Michael R Elliott
- Center for Vaccine Biology and Immunology; Department of Microbiology and Immunology, University of Rochester, Rochester, NY, USA; Center for Cell Clearance and the Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA.
| | - Charles C Chu
- Department of Medicine; Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY.
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Pariser DN, Hilt ZT, Ture SK, Blick-Nitko SK, Looney MR, Cleary SJ, Roman-Pagan E, Saunders J, Georas SN, Veazey J, Madere F, Santos LT, Arne A, Huynh NP, Livada AC, Guerrero-Martin SM, Lyons C, Metcalf-Pate KA, McGrath KE, Palis J, Morrell CN. Lung megakaryocytes are immune modulatory cells. J Clin Invest 2021; 131:137377. [PMID: 33079726 DOI: 10.1172/jci137377] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 10/14/2020] [Indexed: 02/06/2023] Open
Abstract
Although platelets are the cellular mediators of thrombosis, they are also immune cells. Platelets interact both directly and indirectly with immune cells, impacting their activation and differentiation, as well as all phases of the immune response. Megakaryocytes (Mks) are the cell source of circulating platelets, and until recently Mks were typically only considered bone marrow-resident (BM-resident) cells. However, platelet-producing Mks also reside in the lung, and lung Mks express greater levels of immune molecules compared with BM Mks. We therefore sought to define the immune functions of lung Mks. Using single-cell RNA sequencing of BM and lung myeloid-enriched cells, we found that lung Mks, which we term MkL, had gene expression patterns that are similar to antigen-presenting cells. This was confirmed using imaging and conventional flow cytometry. The immune phenotype of Mks was plastic and driven by the tissue immune environment, as evidenced by BM Mks having an MkL-like phenotype under the influence of pathogen receptor challenge and lung-associated immune molecules, such as IL-33. Our in vitro and in vivo assays demonstrated that MkL internalized and processed both antigenic proteins and bacterial pathogens. Furthermore, MkL induced CD4+ T cell activation in an MHC II-dependent manner both in vitro and in vivo. These data indicated that MkL had key immune regulatory roles dictated in part by the tissue environment.
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Affiliation(s)
- Daphne N Pariser
- Aab Cardiovascular Research Institute and.,Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | | | | | | | - Mark R Looney
- Department of Medicine, UCSF, San Francisco, California, USA
| | - Simon J Cleary
- Department of Medicine, UCSF, San Francisco, California, USA
| | | | - Jerry Saunders
- Center for Pediatric Biomedical Research, Department of Pediatrics, and
| | - Steve N Georas
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA.,Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Janelle Veazey
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Ferralita Madere
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Laura Tesoro Santos
- Cardiovascular Research Department, University Hospital Ramón y Cajal Biotechnology, Medicine and Health Sciences PhD Program, University Francisco de Vitoria, Madrid, Spain
| | | | - Nguyen Pt Huynh
- Genomics Research Center, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA.,Center for Translational Neuromedicine, University of Copenhagen, Copenhagen, Denmark
| | - Alison C Livada
- Aab Cardiovascular Research Institute and.,Department of Pathology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Selena M Guerrero-Martin
- Department of Molecular and Comparative Pathobiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Claire Lyons
- Department of Molecular and Comparative Pathobiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kelly A Metcalf-Pate
- Department of Molecular and Comparative Pathobiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | - James Palis
- Center for Pediatric Biomedical Research, Department of Pediatrics, and
| | - Craig N Morrell
- Aab Cardiovascular Research Institute and.,Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA.,Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA.,Department of Pathology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
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Blick-Nitko SK, Morrell C, Livada AC, Maurya P, Ture S, Munger J, Schafer X. Abstract 124: The Immunometabolic Role Of Platelets In Uncomplicated Malaria Infection. Arterioscler Thromb Vasc Biol 2021. [DOI: 10.1161/atvb.41.suppl_1.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The malaria causing
Plasmodium
parasite is a major public health threat.
Plasmodium vivax (P vivax)
is the cause of uncomplicated malaria (UCM). Platelets are the cellular mediators of thrombosis and are also the most numerous immune cells in the blood, and a first responder to infections. Thrombocytopenia is a frequent complication of malaria, and a decrease in platelet count is a negative predictor of disease outcome. Malaria infection elicits a strong interferon gamma (IFNγ) response. IFNγ is a potent inducer of indoleamine 2,3-dioxygenase (IDO1) the rate-limiting enzyme that catalyzes the first step in Tryptophan (Trp) metabolism in the kynurenine (Kyn) pathway, shunting Trp away from serotonin production. Trp metabolism may be altered in malaria infection as a means to regulate immunometabolic responses, but the mechanisms remain unknown. Our platelet RNA-sequencing data from
P vivax
infected humans and from
P yoelii
infected mice showed increased expression of genes related to Trp metabolism, including
IDO1
. The role for platelets in metabolic pathway regulation is poorly explored in general, but particularly in infectious diseases. We introduce a novel idea that platelets participate in immunometabolism to infection. Using complementary experimental approaches such as liquid chromatography-mass spectrometry, ELISA, PCR, western blot, and flow cytometry, we test the hypothesis that platelets are a source of IDO1 in UCM malaria, and thrombocytopenia results in IDO1 depletion and immune dysregulation. We have discovered a role for platelets in Trp metabolic pathway regulation and that platelet regulated immune responses to malaria infection are in part dependent on the Trp metabolic pathways. During
P yoelii
infection there is a depletion of Trp, and increased Kyn metabolites, as well as decreased plasma serotonin. Platelet transfusions to infected mice can increase Kyn. Understanding the interplay between platelets and immunometabolic pathways may provide a better understanding of the impact of thrombocytopenia in diseases beyond malaria, and provide a means to improve malaria infection responses as well as improved platelet-directed therapeutics in many hematological, metabolic, and immune diseases
.
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