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Satpathy S, Thomas BE, Pilcher WJ, Bakhtiari M, Ponder LA, Pacholczyk R, Prahalad S, Bhasin SS, Munn DH, Bhasin MK. The Simple prEservatioN of Single cElls method for cryopreservation enables the generation of single-cell immune profiles from whole blood. Front Immunol 2023; 14:1271800. [PMID: 38090590 PMCID: PMC10713715 DOI: 10.3389/fimmu.2023.1271800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 11/06/2023] [Indexed: 12/18/2023] Open
Abstract
Introduction Current multistep methods utilized for preparing and cryopreserving single-cell suspensions from blood samples for single-cell RNA sequencing (scRNA-seq) are time-consuming, requiring trained personnel and special equipment, so limiting their clinical adoption. We developed a method, Simple prEservatioN of Single cElls (SENSE), for single-step cryopreservation of whole blood (WB) along with granulocyte depletion during single-cell assay, to generate high quality single-cell profiles (SCP). Methods WB was cryopreserved using the SENSE method and peripheral blood mononuclear cells (PBMCs) were isolated and cryopreserved using the traditional density-gradient method (PBMC method) from the same blood sample (n=6). The SCPs obtained from both methods were processed using a similar pipeline and quality control parameters. Further, entropy calculation, differential gene expression, and cellular communication analysis were performed to compare cell types and subtypes from both methods. Results Highly viable (86.3 ± 1.51%) single-cell suspensions (22,353 cells) were obtained from the six WB samples cryopreserved using the SENSE method. In-depth characterization of the scRNA-seq datasets from the samples processed with the SENSE method yielded high-quality profiles of lymphoid and myeloid cell types which were in concordance with the profiles obtained with classical multistep PBMC method processed samples. Additionally, the SENSE method cryopreserved samples exhibited significantly higher T-cell enrichment, enabling deeper characterization of T-cell subtypes. Overall, the SENSE and PBMC methods processed samples exhibited transcriptional, and cellular communication network level similarities across cell types with no batch effect except in myeloid lineage cells. Discussion Comparative analysis of scRNA-seq datasets obtained with the two cryopreservation methods i.e., SENSE and PBMC methods, yielded similar cellular and molecular profiles, confirming the suitability of the former method's incorporation in clinics/labs for cryopreserving and obtaining high-quality single-cells for conducting critical translational research.
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Affiliation(s)
- Sarthak Satpathy
- Aflac Cancer and Blood Disorders Center, Children Healthcare of Atlanta, Atlanta, GA, United States
- Department of Biomedical Informatics, Emory University, Atlanta, GA, United States
| | - Beena E. Thomas
- Aflac Cancer and Blood Disorders Center, Children Healthcare of Atlanta, Atlanta, GA, United States
- Department of Pediatrics, Emory University, Atlanta, GA, United States
| | - William J. Pilcher
- Aflac Cancer and Blood Disorders Center, Children Healthcare of Atlanta, Atlanta, GA, United States
- Department of Biomedical Informatics, Emory University, Atlanta, GA, United States
| | - Mojtaba Bakhtiari
- Aflac Cancer and Blood Disorders Center, Children Healthcare of Atlanta, Atlanta, GA, United States
- Department of Pediatrics, Emory University, Atlanta, GA, United States
| | - Lori A. Ponder
- Division of Rheumatology, Children’s Healthcare of Atlanta, Atlanta, GA, United States
| | - Rafal Pacholczyk
- Georgia Cancer Center, Augusta University, Augusta, GA, United States
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, GA, United States
| | - Sampath Prahalad
- Department of Pediatrics, Emory University, Atlanta, GA, United States
- Division of Rheumatology, Children’s Healthcare of Atlanta, Atlanta, GA, United States
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, United States
| | - Swati S. Bhasin
- Aflac Cancer and Blood Disorders Center, Children Healthcare of Atlanta, Atlanta, GA, United States
- Department of Biomedical Informatics, Emory University, Atlanta, GA, United States
- Department of Pediatrics, Emory University, Atlanta, GA, United States
| | - David H. Munn
- Georgia Cancer Center, Augusta University, Augusta, GA, United States
- Department of Pediatrics, Augusta University, Augusta, GA, United States
| | - Manoj K. Bhasin
- Aflac Cancer and Blood Disorders Center, Children Healthcare of Atlanta, Atlanta, GA, United States
- Department of Biomedical Informatics, Emory University, Atlanta, GA, United States
- Department of Pediatrics, Emory University, Atlanta, GA, United States
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Udomkarnjananun S, Francke MI, Dieterich M, van de Velde D, Verhoeven JGHP, Boer K, Clahsen-Van Groningen MC, De Winter BCM, Baan CC, Hesselink DA. Association Between the Intracellular Tacrolimus Concentration in CD3 + T Lymphocytes and CD14 + Monocytes and Acute Kidney Transplant Rejection. Ther Drug Monit 2022; 44:625-632. [PMID: 35358111 DOI: 10.1097/ftd.0000000000000982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 02/16/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Intracellular tacrolimus concentration in peripheral blood mononuclear cells (PBMCs) (TAC [PBMC] ) has been proposed to better represent its active concentration than its whole blood concentration. As tacrolimus acts on T lymphocytes and other white blood cells, including monocytes, we investigated the association of tacrolimus concentration in CD3 + T lymphocytes (TAC [CD3] ) and CD14 + monocytes (TAC [CD14] ) with acute rejection after kidney transplantation. METHODS From a total of 61 samples in this case-control study, 28 samples were obtained during biopsy-proven acute rejection (rejection group), and 33 samples were obtained in the absence of rejection (control group). PBMCs were collected from both cryopreserved (retrospectively) and freshly obtained (prospectively) samples. CD3 + T lymphocytes and CD14 + monocytes were isolated from PBMCs, and their intracellular tacrolimus concentrations were measured. RESULTS The correlation between tacrolimus whole-blood and intracellular concentrations was poor. TAC [CD3] was significantly lower than TAC [CD14] (median 12.8 versus 81.6 pg/million cells; P < 0.001). No difference in TAC [PBMC] (48.5 versus 44.4 pg/million cells; P = 0.82), TAC [CD3] (13.4 versus 12.5 pg/million cells; P = 0.28), and TAC [CD14] (90.0 versus 72.8 pg/million cells; P = 0.27) was found between the rejection and control groups. However, freshly isolated PBMCs showed significantly higher TAC [PBMC] than PBMCs from cryopreserved samples. Subgroup analysis of intracellular tacrolimus concentrations from freshly isolated cells did not show a difference between rejectors and nonrejectors. CONCLUSIONS Differences in TAC [CD3] and TAC [CD14] between patients with and without rejection could not be demonstrated. However, further optimization of the cell isolation process is required because a difference in TAC [PBMC] between fresh and cryopreserved cells was observed. These results need to be confirmed in a study with a larger number of patients.
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Affiliation(s)
- Suwasin Udomkarnjananun
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
- Division of Nephrology, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - Marith I Francke
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
| | - Marjolein Dieterich
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Daan van de Velde
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands; and
| | - Jeroen G H P Verhoeven
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
| | - Karin Boer
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
| | - Marian C Clahsen-Van Groningen
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
- Department of Pathology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Brenda C M De Winter
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands; and
| | - Carla C Baan
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
| | - Dennis A Hesselink
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
- Erasmus MC Transplant Institute, Rotterdam, the Netherlands
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3
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Immune Subsets From Ficoll Density Gradient Separation in Kidney Transplant Recipients. Transplant Direct 2022; 8:e1319. [PMID: 35464877 PMCID: PMC9018993 DOI: 10.1097/txd.0000000000001319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/08/2022] [Accepted: 03/09/2022] [Indexed: 01/15/2023] Open
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Francke MI, Andrews LM, Lan Le H, van de Velde D, Dieterich M, Udomkarnjananun S, Clahsen-van Groningen MC, Baan CC, van Gelder T, de Winter BCM, Hesselink DA. Monitoring intracellular tacrolimus concentrations and its relationship with rejection in the early phase after renal transplantation. Clin Biochem 2021; 101:9-15. [PMID: 34890583 DOI: 10.1016/j.clinbiochem.2021.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 12/19/2022]
Abstract
INTRODUCTION After kidney transplantation, rejection and drug-related toxicity occur despite tacrolimus whole-blood pre-dose concentrations ([Tac]blood) being within the target range. The tacrolimus concentration within peripheral blood mononuclear cells ([Tac]cells) might correlate better with clinical outcomes. The aim of this study was to investigate the correlation between [Tac]blood and [Tac]cells, the evolution of [Tac]cells and the [Tac]cells/[Tac]blood ratio, and to assess the relationship between tacrolimus concentrations and the occurrence of rejection. METHODS In this prospective study, samples for the measurement of [Tac]blood and [Tac]cells were collected on days 3 and 10 after kidney transplantation, and on the morning of a for-cause kidney transplant biopsy. Biopsies were reviewed according to the Banff 2019 update. RESULTS Eighty-three [Tac]cells samples were measured of 44 kidney transplant recipients. The correlation between [Tac]cells and [Tac]blood was poor (Pearson's r = 0.56 (day 3); r = 0.20 (day 10)). Both the dose-corrected [Tac]cells and the [Tac]cells/[Tac]blood ratio were not significantly different between days 3 and 10, and the median inter-occasion variability of the dose-corrected [Tac]cells and the [Tac]cells/[Tac]blood ratio were 19.4% and 23.4%, respectively (n = 24). Neither [Tac]cells, [Tac]blood, nor the [Tac]cells/[Tac]blood ratio were significantly different between patients with biopsy-proven acute rejection (n = 4) and patients with acute tubular necrosis (n = 4) or a cancelled biopsy (n = 9; p > 0.05). CONCLUSION Tacrolimus exposure and distribution appeared stable in the early phase after transplantation. [Tac]cells was not significantly associated with the occurrence of rejection. A possible explanation for these results might be related to the low number of patients included in this study and also due to the fact that PBMCs are not a specific enough matrix to monitor tacrolimus concentrations.
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Affiliation(s)
- Marith I Francke
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, the Netherlands; Erasmus MC Transplant Institute, the Netherlands.
| | - Louise M Andrews
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands; Department of Hospital Pharmacy, Meander Medical Center, Amersfoort, the Netherlands
| | - Hoang Lan Le
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Daan van de Velde
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Marjolein Dieterich
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Suwasin Udomkarnjananun
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, the Netherlands; Erasmus MC Transplant Institute, the Netherlands; Division of Nephrology, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - Marian C Clahsen-van Groningen
- Erasmus MC Transplant Institute, the Netherlands; Department of Pathology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Carla C Baan
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, the Netherlands; Erasmus MC Transplant Institute, the Netherlands
| | - Teun van Gelder
- Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, the Netherlands
| | - Brenda C M de Winter
- Erasmus MC Transplant Institute, the Netherlands; Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Dennis A Hesselink
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus MC, University Medical Center Rotterdam, the Netherlands; Erasmus MC Transplant Institute, the Netherlands
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Schenz J, Obermaier M, Uhle S, Weigand MA, Uhle F. Low-Density Granulocyte Contamination From Peripheral Blood Mononuclear Cells of Patients With Sepsis and How to Remove It - A Technical Report. Front Immunol 2021; 12:684119. [PMID: 34484182 PMCID: PMC8416421 DOI: 10.3389/fimmu.2021.684119] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 08/02/2021] [Indexed: 12/29/2022] Open
Abstract
Elucidating the mechanisms contributing to the dysregulated host response to infection as part of the syndrome is a current challenge in sepsis research. Peripheral blood mononuclear cells are widely used in immunological studies. Density gradient centrifugation, a common method, is of limited use for blood drawn from patients with sepsis. A significant number of low-density granulocytes co-purify contributing to low purity of isolated peripheral blood mononuclear cells. Whole blood anticoagulated with lithium heparin was drawn from patients with sepsis (n=14) and healthy volunteers (n=11). Immediately after drawing, the plasma fraction was removed and PBMC were isolated from the cellular fraction by density gradient centrifugation. Samples derived from patients with sepsis were subsequently incubated with cluster of differentiation 15 MicroBeads and granulocytes were depleted using magnetic-activated cell sorting. Core cellular functions as antigen presentation and cytokine secretion were analyzed in cells isolated from healthy volunteers (n=3) before and after depletion to confirm consistent functionality. We report here that depleting CD15+ cells after density gradient centrifugation is a feasible way to get rid of the low-density granulocyte contamination. Afterwards, the purity of isolated, functionally intact peripheral blood mononuclear cells is comparable to healthy volunteers. Information on the isolation purity and identification of the containing cell types are necessary for good comparability between different studies. Depletion of CD15+ cells after density gradient centrifugation is an easy but highly efficient way to gain a higher quality and more reliability in studies using peripheral blood mononuclear cells from septic patients without affecting the functionality of the cells.
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Affiliation(s)
- Judith Schenz
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Manuel Obermaier
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Sandra Uhle
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Florian Uhle
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
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Janssen NAF, Grondman I, de Nooijer AH, Boahen CK, Koeken VACM, Matzaraki V, Kumar V, He X, Kox M, Koenen HJPM, Smeets RL, Joosten I, Brüggemann RJM, Kouijzer IJE, van der Hoeven HG, Schouten JA, Frenzel T, Reijers MHE, Hoefsloot W, Dofferhoff ASM, van Apeldoorn MJ, Blaauw MJT, Veerman K, Maas C, Schoneveld AH, Hoefer IE, Derde LPG, van Deuren M, van der Meer JWM, van Crevel R, Giamarellos-Bourboulis EJ, Joosten LAB, van den Heuvel MM, Hoogerwerf J, de Mast Q, Pickkers P, Netea MG, van de Veerdonk FL. Dysregulated Innate and Adaptive Immune Responses Discriminate Disease Severity in COVID-19. J Infect Dis 2021; 223:1322-1333. [PMID: 33524124 PMCID: PMC7928798 DOI: 10.1093/infdis/jiab065] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 01/29/2021] [Indexed: 01/08/2023] Open
Abstract
The clinical spectrum of COVID-19 varies and the differences in host response characterizing this variation have not been fully elucidated. COVID-19 disease severity correlates with an excessive pro-inflammatory immune response and profound lymphopenia. Inflammatory responses according to disease severity were explored by plasma cytokine measurements and proteomics analysis in 147 COVID-19 patients. Furthermore, peripheral blood mononuclear cell cytokine production assays and whole blood flow cytometry were performed. Results confirm a hyperinflammatory innate immune state, while highlighting hepatocyte growth factor and stem cell factor as potential biomarkers for disease severity. Clustering analysis reveals no specific inflammatory endotypes in COVID-19 patients. Functional assays reveal abrogated adaptive cytokine production (interferon-gamma, interleukin-17 and interleukin-22) and prominent T cell exhaustion in critically ill patients, whereas innate immune responses were intact or hyperresponsive. Collectively, this extensive analysis provides a comprehensive insight into the pathobiology of severe to critical COVID-19 and highlight potential biomarkers of disease severity.
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Affiliation(s)
- Nico A F Janssen
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Inge Grondman
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Aline H de Nooijer
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Collins K Boahen
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Valerie A C M Koeken
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Vasiliki Matzaraki
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Vinod Kumar
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands.,Department of Genetics, University Medical Center Groningen, Groningen, the Netherlands
| | - Xuehui He
- Laboratory Medicine, Laboratory for Medical Immunology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Matthijs Kox
- Department of Intensive Care Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Hans J P M Koenen
- Laboratory Medicine, Laboratory for Medical Immunology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Ruben L Smeets
- Laboratory Medicine, Laboratory for Medical Immunology, Radboud University Medical Center, Nijmegen, the Netherlands.,Radboudumc Laboratory for Diagnostics, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Irma Joosten
- Laboratory Medicine, Laboratory for Medical Immunology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Roger J M Brüggemann
- Department of Pharmacy, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Ilse J E Kouijzer
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Hans G van der Hoeven
- Department of Intensive Care Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jeroen A Schouten
- Department of Intensive Care Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Tim Frenzel
- Department of Intensive Care Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Monique H E Reijers
- Department of Pulmonary Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Wouter Hoefsloot
- Department of Pulmonary Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Anton S M Dofferhoff
- Department of Internal Medicine, Canisius Wilhelmina Hospital, Nijmegen, the Netherlands
| | - Marjan J van Apeldoorn
- Department of Internal Medicine, Jeroen Bosch Hospital, 's-Hertogenbosch, the Netherlands
| | - Marc J T Blaauw
- Department of Internal Medicine, Bernhoven Hospital, Uden, the Netherlands
| | - Karin Veerman
- Department of Internal Medicine, Sint Maartenskliniek, Nijmegen, the Netherlands
| | - Coen Maas
- Central Diagnostic Laboratory, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Arjan H Schoneveld
- Central Diagnostic Laboratory, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Imo E Hoefer
- Central Diagnostic Laboratory, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Lennie P G Derde
- Department of Intensive Care Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Marcel van Deuren
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jos W M van der Meer
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Reinout van Crevel
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | | | - Leo A B Joosten
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Michel M van den Heuvel
- Department of Pulmonary Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jacobien Hoogerwerf
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Quirijn de Mast
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Peter Pickkers
- Department of Intensive Care Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands.,Immunology and Metabolism, Life and Medical Sciences Institute, University of Bonn, Bonn, Germany
| | - Frank L van de Veerdonk
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
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Hassani M, Hellebrekers P, Chen N, van Aalst C, Bongers S, Hietbrink F, Koenderman L, Vrisekoop N. On the origin of low-density neutrophils. J Leukoc Biol 2020; 107:809-818. [PMID: 32170882 PMCID: PMC7318192 DOI: 10.1002/jlb.5hr0120-459r] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/31/2020] [Accepted: 02/17/2020] [Indexed: 01/01/2023] Open
Abstract
Here we elaborate on the origin of low(er)-density neutrophils (LDNs) to better understand the variation found in literature. Supplemented with original data, we test the hypothesis that buoyant density of neutrophils is characterized by a spectrum that as a whole shifts to a lower density after activation. Both the 20% highest density (HDNs) and 20% lowest density (LDNs) neutrophils from healthy donors were isolated by Percoll of different densities. Using this method we found that LDNs were significantly better in T-cell suppression and bacterial containment than their 20% highest density counterparts. We found no statistically relevant differences in neutrophil survival or bacterial phagocytosis. Stimulation of healthy donor neutrophils with N-formyl-methionyl-leucyl-phenylalanine induced LDNs co-segregating with peripheral blood mononuclear cells after Ficoll separation. These in vitro induced LDNs showed increased activation markers compared to HDNs and were comparable to the activation markers found on the LDN fraction seen in patients with chronic inflammatory conditions such as present in cancer patients. This all fits with the hypothesis that the density of neutrophils is distributed in a spectrum partially coupled to maturation. Additionally a shift in this spectrum can be induced by in vitro stimulation or by activation in disease.
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Affiliation(s)
- Marwan Hassani
- Department of Respiratory Medicine and Center for Translational ImmunologyUniversity Medical Center UtrechtThe Netherlands
| | - Pien Hellebrekers
- Department of Respiratory Medicine and Center for Translational ImmunologyUniversity Medical Center UtrechtThe Netherlands
- Department of SurgeryUniversity Medical Center UtrechtThe Netherlands
| | - Na Chen
- Department of Respiratory Medicine and Center for Translational ImmunologyUniversity Medical Center UtrechtThe Netherlands
| | - Corneli van Aalst
- Department of Respiratory Medicine and Center for Translational ImmunologyUniversity Medical Center UtrechtThe Netherlands
| | - Suus Bongers
- Department of Respiratory Medicine and Center for Translational ImmunologyUniversity Medical Center UtrechtThe Netherlands
- Department of SurgeryUniversity Medical Center UtrechtThe Netherlands
| | - Falco Hietbrink
- Department of SurgeryUniversity Medical Center UtrechtThe Netherlands
| | - Leo Koenderman
- Department of Respiratory Medicine and Center for Translational ImmunologyUniversity Medical Center UtrechtThe Netherlands
| | - Nienke Vrisekoop
- Department of Respiratory Medicine and Center for Translational ImmunologyUniversity Medical Center UtrechtThe Netherlands
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8
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Heukels P, van Hulst JAC, van Nimwegen M, Boorsma CE, Melgert BN, van den Toorn LM, Boomars KAT, Wijsenbeek MS, Hoogsteden H, von der Thüsen JH, Hendriks RW, Kool M, van den Blink B. Fibrocytes are increased in lung and peripheral blood of patients with idiopathic pulmonary fibrosis. Respir Res 2018; 19:90. [PMID: 29747640 PMCID: PMC5946532 DOI: 10.1186/s12931-018-0798-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 04/29/2018] [Indexed: 02/07/2023] Open
Abstract
Background Fibrocytes are implicated in Idiopathic Pulmonary Fibrosis (IPF) pathogenesis and increased proportions in the circulation are associated with poor prognosis. Upon tissue injury, fibrocytes migrate to the affected organ. In IPF patients, circulating fibrocytes are increased especially during exacerbations, however fibrocytes in the lungs have not been examined. Therefore, we sought to evaluate if fibrocytes can be detected in IPF lungs and we compare percentages and phenotypic characteristics of lung fibrocytes with circulating fibrocytes in IPF. Methods First we optimized flow cytometric detection circulating fibrocytes using a unique combination of intra- and extra-cellular markers to establish a solid gating strategy. Next we analyzed lung fibrocytes in single cell suspensions of explanted IPF and control lungs and compared characteristics and numbers with circulating fibrocytes of IPF. Results Using a gating strategy for both circulating and lung fibrocytes, which excludes potentially contaminating cell populations (e.g. neutrophils and different leukocyte subsets), we show that patients with IPF have increased proportions of fibrocytes, not only in the circulation, but also in explanted end-stage IPF lungs. These lung fibrocytes have increased surface expression of HLA-DR, increased intracellular collagen-1 expression, and also altered forward and side scatter characteristics compared with their circulating counterparts. Conclusions These findings demonstrate that lung fibrocytes in IPF patients can be quantified and characterized by flow cytometry. Lung fibrocytes have different characteristics than circulating fibrocytes and represent an intermediate cell population between circulating fibrocytes and lung fibroblast. Therefore, more insight in their phenotype might lead to specific therapeutic targeting in fibrotic lung diseases. Electronic supplementary material The online version of this article (10.1186/s12931-018-0798-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- P Heukels
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands.
| | - J A C van Hulst
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - M van Nimwegen
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - C E Boorsma
- Department of Pharmacokinetics, Toxicology and Targeting, Groningen Research Institute for Pharmacy, University of Groningen, Groningen, The Netherlands
| | - B N Melgert
- Department of Pharmacokinetics, Toxicology and Targeting, Groningen Research Institute for Pharmacy, University of Groningen, Groningen, The Netherlands
| | - L M van den Toorn
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - K A T Boomars
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - M S Wijsenbeek
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - H Hoogsteden
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - J H von der Thüsen
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - R W Hendriks
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - M Kool
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
| | - B van den Blink
- Department of Pulmonary Medicine, Erasmus MC, s-Gravendijkwal 230, 3015, CE, Rotterdam, The Netherlands
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Scapini P, Marini O, Tecchio C, Cassatella MA. Human neutrophils in the saga of cellular heterogeneity: insights and open questions. Immunol Rev 2017; 273:48-60. [PMID: 27558327 DOI: 10.1111/imr.12448] [Citation(s) in RCA: 190] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent findings have uncovered novel fascinating aspects of the biology of neutrophils, which ultimately attribute to these cells a broader role in inflammation and immunity. One aspect that is currently under intensive investigation is the notion of neutrophil 'heterogeneity'. Studies examining neutrophils in a variety of acute and chronic inflammatory conditions report, in fact, the recovery of CD66b(+) cells displaying neutrophil-like morphology at different degrees of maturation/activation, able to exert either immunosuppressive or proinflammatory properties. These heterogeneous populations of mature and immature neutrophils are indicated with a variety of names, including 'low density neutrophils (LDNs)', 'low density granulocytes (LDGs)', 'granulocytic-myeloid derived suppressor cells (G-MDSCs)', and immunosuppressive neutrophils. However, due to the lack of discrete markers that can unequivocally allow their specific identification and isolation, the precise phenotype and function of all these presumably novel, neutrophil-like, populations have not been correctly defined yet. Aim of this article is to summarize current knowledge on the mature and immature neutrophil populations described to date, featuring immunosuppressive or proinflammatory properties, often defined as 'subsets', as well as to critically discuss unresolved issues in the field.
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Affiliation(s)
- Patrizia Scapini
- Division of General Pathology, University of Verona, Verona, Italy
| | - Olivia Marini
- Division of General Pathology, University of Verona, Verona, Italy
| | - Cristina Tecchio
- Division of Hematology and Bone Marrow Transplant Unit, University of Verona, Verona, Italy
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10
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Lemaitre F, Blanchet B, Latournerie M, Antignac M, Houssel-Debry P, Verdier MC, Dermu M, Camus C, Le Priol J, Roussel M, Zheng Y, Fillatre P, Curis E, Bellissant E, Boudjema K, Fernandez C. Pharmacokinetics and pharmacodynamics of tacrolimus in liver transplant recipients: inside the white blood cells. Clin Biochem 2015; 48:406-11. [DOI: 10.1016/j.clinbiochem.2014.12.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 12/17/2014] [Accepted: 12/20/2014] [Indexed: 10/24/2022]
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11
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Darcy CJ, Minigo G, Piera KA, Davis JS, McNeil YR, Chen Y, Volkheimer AD, Weinberg JB, Anstey NM, Woodberry T. Neutrophils with myeloid derived suppressor function deplete arginine and constrain T cell function in septic shock patients. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2014; 18:R163. [PMID: 25084831 PMCID: PMC4261583 DOI: 10.1186/cc14003] [Citation(s) in RCA: 134] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 06/18/2014] [Indexed: 01/05/2023]
Abstract
Introduction Impaired T cell function in sepsis is associated with poor outcome, but the mechanisms are unclear. In cancer, arginase-expressing myeloid derived suppressor cells (MDSCs) deplete arginine, impair T cell receptor CD3 zeta-chain expression and T cell function and are linked to poor clinical outcome, but their role during acute human infectious disease and in particular sepsis remains unknown. Hypoarginemia is prevalent in sepsis. This study aimed to determine whether neutrophils that co-purify with PBMC express arginase, and if arginine depletion constrains T cell CD3 zeta-chain expression and function in human sepsis. Methods Using flow cytometry, cell culture, HPLC, arginase activity and mRNA detection, our study examined whether neutrophils, with reduced buoyant density isolated in the Ficoll interface, metabolise L-arginine and suppress T cell proliferation in sepsis. A total of 35 sepsis patients (23 with septic shock) and 12 hospital controls in a tertiary referral hospital in tropical Australia were evaluated. Results Only sepsis patients had interphase neutrophils, neutrophils co-purifying with mononuclear cells (≤1.077 specific gravity). The percentage of interphase neutrophils in sepsis was proportional to sepsis severity and correlated with plasma IL-6 concentrations. Ex vivo, sepsis-derived interphase neutrophils expressed arginase, metabolised culture L-arginine and suppressed T cell proliferation and CD3 zeta-chain expression. In vivo, in septic shock there was a longitudinal inverse association between interphase neutrophil number and CD3 zeta-chain expression. Depletion or inhibition of interphase neutrophils in vitro restored zeta-chain expression and T cell function. Conclusions For the first time during an acute human infection, interphase neutrophils that express arginase were found to circulate in sepsis, in proportion to disease severity. These neutrophil-MDSCs impair T cell CD3 zeta-chain expression and T cell function via L-arginine metabolism, and likely contribute to the T cell dysfunction seen in sepsis. Modulation of neutrophil-MDSC or their downstream effects warrant consideration as targets for novel adjunctive therapies in sepsis. Electronic supplementary material The online version of this article (doi:10.1186/cc14003) contains supplementary material, which is available to authorized users.
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van Ierssel SH, Van Craenenbroeck EM, Hoymans VY, Vrints CJ, Conraads VM, Jorens PG. Endothelium dependent vasomotion and in vitro markers of endothelial repair in patients with severe sepsis: an observational study. PLoS One 2013; 8:e69499. [PMID: 23936333 PMCID: PMC3735536 DOI: 10.1371/journal.pone.0069499] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Accepted: 06/10/2013] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Outcome in sepsis is mainly defined by the degree of organ failure, for which endothelial dysfunction at the macro- and microvascular level is an important determinant. In this study we evaluated endothelial function in patients with severe sepsis using cellular endothelial markers and in vivo assessment of reactive hyperaemia. MATERIALS AND METHODS Patients with severe sepsis (n = 30) and 15 age- and gender- matched healthy volunteers were included in this study. Using flow cytometry, CD34+/KDR+ endothelial progenitor cells (EPC), CD31+ T-cells, and CD31+/CD42b- endothelial microparticles (EMP) were enumerated. Migratory capacity of cultured circulating angiogenic cells (CAC) was assessed in vitro. Endothelial function was determined using peripheral arterial tonometry at the fingertip. RESULTS In patients with severe sepsis, a lower number of EPC, CD31+ T-cells and a decreased migratory capacity of CAC coincided with a blunted reactive hyperaemia response compared to healthy subjects. The number of EMP, on the other hand, did not differ. The presence of organ failure at admission (SOFA score) was inversely related with the number of CD31+ T-cells. Furthermore, the number of EPC at admission was decreased in patients with progressive organ failure within the first week. CONCLUSION In patients with severe sepsis, in vivo measured endothelial dysfunction coincides with lower numbers and reduced function of circulating cells implicated in endothelial repair. Our results suggest that cellular markers of endothelial repair might be valuable in the assessment and evolution of organ dysfunction.
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Affiliation(s)
- Sabrina H van Ierssel
- Department of Critical Care Medicine, Antwerp University Hospital, University of Antwerp, Edegem, Belgium.
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Innate immune functions of immature neutrophils in patients with sepsis and severe systemic inflammatory response syndrome. Crit Care Med 2013; 41:820-32. [PMID: 23348516 DOI: 10.1097/ccm.0b013e318274647d] [Citation(s) in RCA: 163] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE A hallmark of sepsis and severe systemic inflammatory response syndrome (SIRS) is the massive recruitment of immature neutrophils from the bone marrow into the circulation (left shift, band forms). Their capacity to participate in innate defense against bacteria is ill defined. We aimed at comparing various innate immune functions of mature vs. immature neutrophils circulating during sepsis and SIRS. DESIGN Prospective, observational cohort study. SETTING Tertiary level ICU and associated research laboratory. PATIENTS : Thirty-three ICU patients with sepsis; 12 ICUs with SIRS; 32 healthy volunteers. INTERVENTIONS Twenty milliliters of whole heparinized blood was used for in vitro studies including neutrophil viability and apoptosis, surface expression of CD16, Toll-like receptors () 4 and TLR2, CD14, MD-2, HLA-DP,-DQ and -DR, and CXCR2, chemotaxis, phagocytosis, bacterial killing, and tumor necrosis factor-α/interleukin-10 baseline intracellular cytokine levels. MEASUREMENTS AND MAIN RESULTS Immature neutrophils were capable of mediating important innate immune functions such as bacterial phagocytosis and killing via the production of reactive oxygen species, although less efficiently than mature neutrophils. Immature neutrophils had a longer life span and resistance to spontaneous apoptosis, and could mature ex vivo. They expressed lower levels of receptors for bacterial molecules such as CD14 and MD-2 and migrated less efficiently than mature granulocytes. Immature neutrophils had higher basal intracellular tumor necrosis factor-α/interleukin-10 ratio than that of mature neutrophils, suggesting a proinflammatory phenotype. No significant differences were observed between immature neutrophils isolated from patients with sepsis and those from patients with severe SIRS. CONCLUSIONS Despite their "immaturity", band forms are capable of mediating crucial innate immune functions during severe infections and sepsis. Their fate and capacity to mature in vivo remain to be determined.
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Increased granzyme levels in cytotoxic T lymphocytes are associated with disease severity in emergency department patients with severe sepsis. Shock 2012; 37:257-62. [PMID: 22089193 DOI: 10.1097/shk.0b013e31823fca44] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Exocytosis of granules containing the cytolytic effector (CE) molecules granzyme A (GzmA), granzyme B (GzmB), and perforin is one major pathway of lymphocyte-mediated cytotoxicity. Studies in murine models and the finding of elevated granzyme levels in the plasma of septic patients have implicated cytotoxic lymphocytes in the pathogenesis of sepsis. We sought to evaluate the role of cytotoxic cells and CE in sepsis and determine if intracellular levels of CE in cytotoxic cells correlate with disease severity. We conducted a prospective cohort study of 40 patients enrolled into one of three groups: controls (C), acutely ill nonseptic illnesses, or patients with severe sepsis (SS) (lactate, >4 mmol/L; systolic blood pressure, <90 mmHg after 2 L normal saline). Peripheral blood mononuclear cells were isolated and stained for extracellular markers for defined subpopulations and for intracellular expression of GzmA and GzmB and perforin. Levels of CE were quantified by geometric mean fluorescent intensity (GMFI) via flow cytometry. Cytotoxic T lymphocyte (CTL) expression was higher in SS (P = 0.04). The GMFI of GzmB was significantly higher in CTLs of SS patients versus acutely ill nonseptic illnesses or C. The GMFI of each GzmA and GzmB in CTLs were associated with the Acute Physiology and Chronic Health Evaluation II score (P = 0.01). A significant increase in the number of granulocytes in the peripheral blood mononuclear cells of SS patients consisted primarily of low-density neutrophils, which expressed increased levels of GzmA (P < 0.01). The results suggest that CTLs are activated in SS and express significantly higher intracellular levels of GzmB and that GzmA and B levels correlate with disease severity.
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Govaert JA, Swijnenburg RJ, Schrepfer S, Xie X, van der Bogt KEA, Hoyt G, Stein W, Ransohoff KJ, Robbins RC, Wu JC. Poor functional recovery after transplantation of diabetic bone marrow stem cells in ischemic myocardium. J Heart Lung Transplant 2009; 28:1158-1165.e1. [PMID: 19782602 DOI: 10.1016/j.healun.2009.06.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 06/05/2009] [Accepted: 06/27/2009] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Autologous bone marrow mononuclear cell (BMMC) therapy has shown promise for improving cardiac function after myocardial infarction. The efficiency of such therapy for diabetic patients remains unknown. METHODS BMMCs were harvested from type 2 diabetic male BKS.Cg-m+/+Lepr(db)/J mice or C57BLKS/J (non-diabetic control) mice and were isolated using Ficoll-based separation. Cell characterization was performed by flow cytometry. Cell viability was determined by apoptosis and proliferation assays. Female BKS.Cg-m+/+Lepr(db)/J mice underwent left anterior descending artery ligation and were randomized into 3 groups receiving 2.5 x 10(6) diabetic BMMCs (n = 8), 2.5 x 10(6) control BMMCs (n = 8), or phosphate-buffered saline (n = 6). At Week 5, cardiac function was assessed with echocardiography and invasive hemodynamic measurements. Post-mortem cell survival was quantified by TaqMan real-time transcription polymerase chain reaction (RT-PCR) for the male Sry gene. RESULTS BKS.Cg-m+/+Lepr(db)/J BMMCs showed a significantly lower mononuclear fraction and a significantly lower proliferation rate compared with C57BLKS/J BMMCs. Fractional shorting (40.1% +/- 1.2% vs 30.3% +/- 1.9%; p = 0.001) and cardiac output (4,166 +/- 393 vs 2,246 +/- 462 microl/min; p = 0.016) significantly improved for mice treated with control BMMCs injection compared with those treated with diabetic BMMCs, respectively. This difference could not be attributed to difference in cell engraftment because TaqMan RT-PCR showed no significant difference in cell survival in infarcted hearts between the 2 groups. CONCLUSIONS Diabetic BMMCs are significantly impaired in their ability to improve cardiac function after myocardial infarction compared with control BMMCs. These findings could have significant clinical implication regarding autologous BMMC therapy in diabetic patients.
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Preobrazhensky SN, Bahler DW. Immunomagnetic bead separation of mononuclear cells from contaminating granulocytes in cryopreserved blood samples. Cryobiology 2009; 59:366-8. [PMID: 19766618 DOI: 10.1016/j.cryobiol.2009.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Revised: 09/04/2009] [Accepted: 09/15/2009] [Indexed: 11/30/2022]
Abstract
Density gradient centrifugation usually allows efficient separation of mononuclear cells from granulocytes using fresh human blood samples. However, we have found that with cryopreserved blood samples, density gradient centrifugation fails to separate granulocytes from mononuclear cells and have explored using immunomagnetic anti-CD15 microbeads as an alternate method to separate these cell populations. Using cryopreserved blood samples from 10 healthy donors we have shown that granulocytes express a significantly higher level of CD15 antigen than monocytes and lymphocytes, which allows for their efficient separation from mononuclear cells using anti-CD15 microbeads. This procedure is critical for purification of individual cell populations from cryopreserved leukocyte samples and could also potentially be applied to avoid granulocyte contamination of mononuclear cells isolated from stored blood and from patients with sepsis or thermal injury.
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Affiliation(s)
- Sergey N Preobrazhensky
- ARUP Laboratories, Institute for Clinical and Experimental Pathology, 500 Chipeta Way, Salt Lake City, UT 84108-1221, USA.
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van den Akker ELT, Koper JW, Joosten K, de Jong FH, Hazelzet JA, Lamberts SWJ, Hokken-Koelega ACS. Glucocorticoid receptor mRNA levels are selectively decreased in neutrophils of children with sepsis. Intensive Care Med 2009; 35:1247-54. [PMID: 19373457 PMCID: PMC2698978 DOI: 10.1007/s00134-009-1468-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Accepted: 02/22/2009] [Indexed: 11/15/2022]
Abstract
Objective Corticosteroids are used in sepsis treatment to benefit outcome. However, discussion remains on which patients will benefit from treatment. Inter-individual variations in cortisol sensitivity, mediated through the glucocorticoid receptor, might play a role in the observed differences. Our aim was to study changes in mRNA levels of three glucocorticoid receptor splice variants in neutrophils of children with sepsis. Patients and design Twenty-three children admitted to the pediatric intensive care unit with sepsis or septic shock were included. Neutrophils were isolated at days 0, 3 and 7, and after recovery (>3 months). mRNA levels of the glucocorticoid receptor splice variants GR-α (determining most of the cortisol effect), GR-P (increasing GR-α effect) and GR-β (inhibitor of GR-α) were measured quantitatively. Main results Neutrophils from sepsis patients showed decreased levels of glucocorticoid receptor mRNA of the GR-α and GR-P splice variants on day 0 compared to after recovery. GR-α and GR-P mRNA levels showed a gradual recovery on days 3 and 7 and normalized after recovery. GR-β mRNA levels did not change significantly during sepsis. GR expression was negatively correlated to interleukin-6 (a measure of disease severity, r = −0.60, P = 0.009). Conclusions Children with sepsis or septic shock showed a transient depression of glucocorticoid receptor mRNA in their neutrophils. This feature may represent a tissue-specific adaptation during sepsis leading to increased cortisol resistance of neutrophils. Our study adds to understanding the mechanism of cortisol sensitivity in immune cells. Future treatment strategies, aiming at timing and tissue specific regulation of glucocorticoids, might benefit patients with sepsis or septic shock.
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Affiliation(s)
- Erica L T van den Akker
- Division of Pediatric Endocrinology, Department of Pediatrics, Erasmus MC, Rotterdam, The Netherlands.
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Year in review in Intensive Care Medicine, 2008: II. Experimental, acute respiratory failure and ARDS, mechanical ventilation and endotracheal intubation. Intensive Care Med 2009; 35:215-31. [PMID: 19125232 PMCID: PMC2638603 DOI: 10.1007/s00134-008-1380-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Accepted: 12/15/2008] [Indexed: 12/11/2022]
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