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Kelesidis T, Zhang Y, Tran E, Sosa G, Middlekauff HR. Increased Expression of Proatherogenic Proteins in Immune Cell Subtypes in Tobacco Cigarette Smokers But Not in Electronic Cigarette Vapers. Can J Cardiol 2021; 37:1175-1180. [PMID: 34023441 PMCID: PMC9014478 DOI: 10.1016/j.cjca.2021.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 12/23/2022] Open
Abstract
It is unclear how oxidative stress triggered by smoking and vaping may alter specific immune cell subsets. In this study, we showed that tobacco cigarette smoking, but not electronic-cigarette vaping, is associated with increased expression of major proteins in the toll-like receptor 4 (TLR4) inflammasome-interleukin (IL)-6 signalling axis in monocyte subtypes and T cells. TLR4 senses oxidative stress in immune cells caspase-1 is a key protein of inflammasome activation, and IL-6R-α is the receptor for IL-6 that drives proatherogenic IL-6 signalling. These findings implicate the non-nicotine, pro-oxidant toxicants in tobacco cigarette smoke as instigators of increased expression of key proteins in the TLR4-inflammasome-IL-6 axis that contribute to atherogenesis.
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Affiliation(s)
- Theodoros Kelesidis
- Department of Medicine, Division of Infectious Disease, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Yuyan Zhang
- Department of Medicine, Division of Infectious Disease, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Elizabeth Tran
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Grace Sosa
- Department of Medicine, Division of Infectious Disease, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Holly R Middlekauff
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.
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Thome AD, Atassi F, Wang J, Faridar A, Zhao W, Thonhoff JR, Beers DR, Lai EC, Appel SH. Ex vivo expansion of dysfunctional regulatory T lymphocytes restores suppressive function in Parkinson's disease. NPJ Parkinsons Dis 2021; 7:41. [PMID: 33986285 PMCID: PMC8119976 DOI: 10.1038/s41531-021-00188-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 03/22/2021] [Indexed: 02/07/2023] Open
Abstract
Inflammation is a pathological hallmark of Parkinson's disease (PD). Chronic pro-inflammatory responses contribute to the loss of neurons in the neurodegenerative process. The present study was undertaken to define the peripheral innate and adaptive immune contributions to inflammation in patients with PD. Immunophenotyping revealed a shift of peripheral myeloid and lymphoid cells towards a pro-inflammatory phenotype. Regulatory T cells (Tregs) were reduced in number, and their suppression of T responder proliferation decreased. The PD Tregs did not suppress activated pro-inflammatory myeloid cells. Ex vivo expansion of Tregs from patients with PD restored and enhanced their suppressive functions while expanded Tregs displayed increased expression of foxp3, il2ra (CD25), nt5e (CD73), il10, il13, ctla4, pdcd1 (PD1), and gzmb. Collectively, these findings documented a shift towards a pro-inflammatory peripheral immune response in patients with PD; the loss of Treg suppressive functions may contribute significantly to this response, supporting PD as a disorder with extensive systemic pro-inflammatory responses. The restoration and enhancement of Treg suppressive functions following ex vivo expansion may provide a potential cell therapeutic approach for patients with PD.
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Affiliation(s)
- Aaron D. Thome
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - Farah Atassi
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - Jinghong Wang
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - Alireza Faridar
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - Weihua Zhao
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - Jason R. Thonhoff
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - David R. Beers
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - Eugene C. Lai
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
| | - Stanley H. Appel
- grid.63368.380000 0004 0445 0041Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX USA
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103
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Differential effects of whole blood heat treatment on the ex vivo inflammatory profile of untrained and trained men. Cytokine 2021; 142:155514. [PMID: 33812764 DOI: 10.1016/j.cyto.2021.155514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 03/20/2021] [Accepted: 03/22/2021] [Indexed: 11/20/2022]
Abstract
This study evaluated the effects of heat stress on the ex vivo inflammatory profile in untrained and trained men. Whole blood samples from untrained (UT) and trained (TR) individuals were incubated for 2 h at 37 °C or 40 °C. The whole blood of a subsample of the participants (n = 5 in both TR and UT groups) were stimulated with lipopolysaccharide (LPS, 10 ng/mL) concomitant to heat treatment (37 °C versus 40 °C). Flow cytometry was used to assess the intracellular NF-κB activation in CD4+ T cells and CD14+ monocytes, the expression of Toll-Like Receptor-4 (TLR-4), the frequencies of CD4+CD25-CD39+ and CD4+CD25+CD39+ T cells and monocyte subsets (CD14+CD16-; CD14+CD16+; CD14-CD16+), the mitochondrial membrane potential (MMP) and the reactive oxygen species (ROS) production by lymphocytes and monocytes. The production of interleukin (IL)-6, IL-10, and tumor necrosis factor-alpha (TNF-α) by LPS-stimulated whole blood were also evaluated. Heat treatment (40 °C) increased the proportions of CD14+CD16- and CD14+CD16+ monocytes and the lymphocyte MMP in the UT group. The frequencies of CD14-CD16+ monocytes and the activation of NF-κB in CD14+ monocytes decreased in UT and TR groups after heat treatment, while a reduction in CD4+CD25-CD39+ T-cells was observed only in the UT group. Higher TLR-4 and NF-κB activation were found in LPS-stimulated monocytes of UT men concomitant with higher TNF-α production and diminished IL-10 production after heat treatment. TR individuals presented lower NF- κB activation in LPS-stimulated monocytes after heat treatment. Our data suggest that the training status of individuals may impact on the anti-inflammatory response of heat treatment.
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104
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Krychtiuk KA, Lenz M, Hohensinner P, Distelmaier K, Schrutka L, Kastl SP, Huber K, Dostal E, Oravec S, Hengstenberg C, Wojta J, Speidl WS. Circulating levels of proprotein convertase subtilisin/kexin type 9 (PCSK9) are associated with monocyte subsets in patients with stable coronary artery disease. J Clin Lipidol 2021; 15:512-521. [PMID: 33789832 DOI: 10.1016/j.jacl.2021.02.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Proprotein convertase subtilisin/kexin type-9 (PCSK9) is an enzyme promoting the degradation of low-density lipoprotein receptors (LDL-R) in hepatocytes. Inhibition of PCSK9 has emerged as a novel target for lipid-lowering therapy. Monocytes are crucially involved in the pathogenesis of atherosclerosis and can be divided into three subsets. OBJECTIVE The aim of this study was to examine whether circulating levels of PCSK9 are associated with monocyte subsets. METHODS We included 69 patients with stable coronary artery disease. PCSK9 levels were measured and monocyte subsets were assessed by flow cytometry and divided into classical monocytes (CD14++CD16-; CM), intermediate monocytes (CD14++CD16+; IM) and non-classical monocytes (CD14+CD16++; NCM). RESULTS Mean age was 64 years and 80% of patients were male. Patients on statin treatment (n = 55) showed higher PCSK9-levels (245.4 (206.0-305.5) ng/mL) as opposed to those without statin treatment (186.1 (162.3-275.4) ng/mL; p = 0.05). In patients on statin treatment, CM correlated with circulating PCSK9 levels (R = 0.29; p = 0.04), while NCM showed an inverse correlation with PCSK9 levels (R = -0.33; p = 0.02). Patients with PCSK9 levels above the median showed a significantly higher proportion of CM as compared to patients with PCSK9 below the median (83.5 IQR 79.2-86.7 vs. 80.4, IQR 76.5-85.2%; p = 0.05). Conversely, PCSK9 levels >median were associated with a significantly lower proportion of NCM as compared to those with PCSK9 <median (10.2, IQR 7.3-14.6 vs. 14.3, IQR 10.9-18.7%; p = 0.02). In contrast, IM showed no association with PCSK9 levels. CONCLUSIONS We hereby provide a novel link between PCSK9 regulation, innate immunity and atherosclerotic disease in statin-treated patients.
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Affiliation(s)
- Konstantin A Krychtiuk
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Max Lenz
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Philipp Hohensinner
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria
| | - Klaus Distelmaier
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Lore Schrutka
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Stefan P Kastl
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Kurt Huber
- Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; 3rd Medical Department, Wilhelminenhospital, Vienna, Austria
| | | | - Stanislav Oravec
- 1st Medical Clinic; Medical Faculty of Comenius University Bratislava, Bratislava, Slovakia
| | - Christian Hengstenberg
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Johann Wojta
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Core Facilities, Medical University of Vienna, Vienna, Austria
| | - Walter S Speidl
- Department of Internal Medicine II - Division of Cardiology, Medical University of Vienna, Vienna, Austria.
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105
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Zheng X, Wang Q, Xie Z, Li J. The elevated level of IL-1α in the bone marrow of aged mice leads to MSC senescence partly by down-regulating Bmi-1. Exp Gerontol 2021; 148:111313. [PMID: 33740618 DOI: 10.1016/j.exger.2021.111313] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 11/30/2022]
Abstract
Osteoporosis is becoming increasingly prevalent with individual aging. Recent studies found that bone marrow mesenchymal stem cells (MSCs) undergo senescence along with the progression of age-related osteoporosis, leading to a decreased rate of new bone formation and fracture repair. The underlying mechanism of MSC senescence in the aged bone marrow has not been clarified yet. Here we found that MSCs from aged mice (12-month-old, O-MSCs) exhibited apparent senescent phenotypes compared with those from young controls (2-month-old, Y-MSCs), including lower proliferation rate, impaired self-renewal capacity, increased p16Ink4a expression and shifted differentiation balance to favor adipocytes over osteoblasts. Bmi-1, one of the main factors that regulate stem cell self-renewal, is dramatically decreased in O-MSCs. Knocking-down of Bmi-1 in Y-MSCs lead to cellular senescence, while over-expression of it rejuvenated O-MSCs. We further showed that the level of IL-1α is much higher in the bone marrow fluid of aged mice, which significantly inhibited Bmi-1 expression in MSCs. Our present study indicated that IL-1α, a key component of the senescence-associated secretory phenotype (SASP), is elevated in the aged bone marrow microenvironment, leading to decreased Bmi-1 expression in MSCs and consequently, MSC senescence.
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Affiliation(s)
- Xueling Zheng
- Department of Cell Biology, Zunyi Medical University, Zunyi 563000, Guizhou, China
| | - Qianxing Wang
- Department of Cell Biology, Zunyi Medical University, Zunyi 563000, Guizhou, China
| | - Zhuo Xie
- Department of Cell Biology, Zunyi Medical University, Zunyi 563000, Guizhou, China
| | - Jiao Li
- Department of Cell Biology, Zunyi Medical University, Zunyi 563000, Guizhou, China.
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106
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Pence BD, Yarbro JR, Emmons RS. Growth differentiation factor-15 is associated with age-related monocyte dysfunction. Aging Med (Milton) 2021; 4:47-52. [PMID: 33738380 PMCID: PMC7954822 DOI: 10.1002/agm2.12128] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE Age-associated decreases in immune functions are precipitated by a variety of mechanisms and affect nearly every immune cell subset. In myeloid cells, aging reduces numbers of phagocytes and impairs their functional abilities, including antigen presentation, phagocytosis, and bacterial clearance. Recently, we described an aging effect on several functions in monocytes, including impaired mitochondrial function and reduced inflammatory cytokine gene expression during stimulation with lipopolysaccharide. We hypothesized that circulating factors altered by the aging process underly these changes. Growth differentiation factor-15 (GDF-15) is a distant member of the transforming growth factor-β superfamily that has known anti-inflammatory effects in macrophages and has been shown to be highly differentially expressed during aging. METHODS We used biobanked plasma samples to assay circulating GDF-15 levels in subjects from our previous studies and examined correlations between GDF-15 and monocyte function. RESULTS Monocyte interleukin-6 production due to lipopolysaccharide stimulation was negatively correlated to plasma GDF-15. Additionally, GDF-15 was positively correlated to circulating CD16 + monocyte proportions and negatively correlated to monocyte mitochondrial respiratory capacity. CONCLUSIONS These results suggest that GDF-15 is a potential circulating factor affecting a variety of monocyte functions and promoting monocyte immunosenescence and thus may be an attractive candidate for therapeutic intervention to ameliorate this.
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Affiliation(s)
- Brandt D. Pence
- College of Health SciencesUniversity of MemphisMemphisTennesseeUSA
- Center for Nutraceutical and Dietary Supplement ResearchUniversity of MemphisMemphisTennesseeUSA
| | - Johnathan R. Yarbro
- College of Health SciencesUniversity of MemphisMemphisTennesseeUSA
- Bioinformatics ProgramUniversity of MemphisMemphisTennesseeUSA
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107
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Cheon SY, Lee JE. Extracellular Vesicles and Immune System in Ageing and Immune Diseases. Exp Neurobiol 2021; 30:32-47. [PMID: 33632983 PMCID: PMC7926047 DOI: 10.5607/en20059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/06/2021] [Accepted: 01/17/2021] [Indexed: 02/06/2023] Open
Abstract
Immune system is essential for host homeostasis. Immune cells communicate with each other by binding to receptors or by releasing vesicles including chemokines and cytokines. Under healthy circumstances, immune cell-derived factors are critical for cellular growth, division and function, whereas under conditions such as ageing and inflammatory states, they can aggravate pathologies and cause disease. Cell-derived membranous extracellular vesicles mediate cell-to-cell communication and are implicated in various physiological and pathological processes involving ageing and age-related diseases. Extracellular vesicles are responsible for spreading detrimental factors to the surroundings and the propagation phase of inflammatory diseases. The regulation of extracellular vesicles is a putative target for treatment of inflammatory diseases. Moreover, their features are ideal for developing biomarkers and drug delivery systems modulated by bioengineering in inflammatory diseases. The present review summarizes the current understanding of extracellular vesicles in ageing and inflammatory diseases.
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Affiliation(s)
- So Yeong Cheon
- Department of Biotechnology, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Korea
| | - Jong Eun Lee
- Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Korea.,BK21 PLUS Project for Medical Science, and Brain Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea
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108
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Arroyo E, Laudato JA, Gibson BM, Dulaney CS, Vaughan JA, Followay BN, Glickman EL, Jajtner AR. Tumor necrosis factor-α, TNF receptor, and soluble TNF receptor responses to aerobic exercise in the heat. Cytokine X 2021; 2:100033. [PMID: 33604558 PMCID: PMC7885885 DOI: 10.1016/j.cytox.2020.100033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 07/02/2020] [Accepted: 07/08/2020] [Indexed: 11/26/2022] Open
Abstract
Aerobic exercise in the heat promotes modest increases in plasma TNF-α and STNFR1. Increases in TNF-α and STNFR1 are likely driven by changes in core temperature. TNFR1 and 2 expression on non-classical monocytes is blunted one hour post-exercise. TNFR1 expression on non-classical monocytes is elevated during exercise in the heat.
The purpose of this study was to evaluate the effects of aerobic exercise in the heat on circulating concentrations of tumor necrosis factor (TNF)-α, soluble TNF receptors (STNFR1&2), and surface expression of TNFR1&2 on monocyte subpopulations. Twelve recreationally active Caucasian men (24.4 ± 3.4 yrs.; 180.0 ± 6.8 cm; 81.5 ± 8.0 kg; 47.2 ± 4.8 mL·kg−1·min−1) completed an exercise protocol in three environmental conditions: high temperature/low humidity [HTLH; 35 °C, 20% relative humidity (RH)]; high temperature/moderate humidity (HTMH; 35 °C, 45%RH); and moderate temperature/moderate humidity (MTMH; 22 °C, 45%RH). Each protocol consisted of a 60-minute cycling trial at 60% VO2max, a 15-minute rest, and a time-to-exhaustion trial at 90% VO2max (TTE). Blood was sampled before (PRE), immediately after (POST) the 60-minute trial, immediately post-TTE (PTTE), and one-hour post-TTE (REC). Circulating TNF-α and STNFR1&2 were assayed. TNFR1&2 expression on monocyte subsets was measured by flow cytometry on a subset of participants (n = 8). TNF-α area under the curve with respect to increase (AUCi) was greater during HTMH compared to MTMH and HTLH. STNFR1 concentration was greater during HTMH compared to MTMH. With all trials combined, STNFR1 concentration increased from PRE to POST, PTTE, and REC. TNFR1 expression on non-classical monocytes was greater during HTMH compared to HTLH while TNFR2 expression was lower during HTLH compared to both MTMH and HTMH. Data suggest that exercise in the heat increases circulating TNF-α and STNFR1 concentration concomitantly. Furthermore, non-classical monocyte expression of TNFRs are impacted by temperature and humidity during exercise.
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Affiliation(s)
- Eliott Arroyo
- Exercise Science Program, Kent State University, Kent, OH, USA
| | | | | | - Cody S Dulaney
- Exercise Science Program, Kent State University, Kent, OH, USA
| | | | | | | | - Adam R Jajtner
- Exercise Science Program, Kent State University, Kent, OH, USA
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109
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Oh ES, Na M, Rogers CJ. The Association Between Monocyte Subsets and Cardiometabolic Disorders/Cardiovascular Disease: A Systematic Review and Meta-Analysis. Front Cardiovasc Med 2021; 8:640124. [PMID: 33681309 PMCID: PMC7925827 DOI: 10.3389/fcvm.2021.640124] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 01/27/2021] [Indexed: 12/12/2022] Open
Abstract
Background: Monocyte subsets in humans, i.e., classical (CM), intermediate (IM), and non-classical monocytes (NCM), are thought to differentially contribute to the pathogenesis of atherosclerosis, the leading cause of cardiovascular disease (CVD). However, the association between monocyte subsets and cardiometabolic disorders and CVD is not well-understood. Thus, the aim of the current systematic review and meta-analysis was to evaluate recent findings from clinical studies that examined the association between the distribution of monocyte subsets in subjects with cardiometabolic disorders and CVD compared to healthy controls. Methods: Articles were systematically searched in CINAHL, PubMed and Cochrane Library. Articles were independently screened and selected by two reviewers. Studies that reported the percentage of each monocyte subset were included in the systematic review and meta-analysis. For the meta-analysis, a random-effects model was used to generate pooled standardized mean differences (SMD) between subjects with cardiometabolic disorders and healthy controls. Results: A total of 1,693 articles were screened and 27 studies were selected for qualitative analyses. Among them, six studies were included in the meta-analysis. In total, sample size ranged from 22 to 135 and mean or median age from 22 to 70 years old. We found studies that reported higher percentage and number of IM and/or NCM in subjects with cardiometabolic disorders (9 out of 13 studies) and in subjects with CVD (11 out of 15 studies) compared to healthy controls. In the meta-analysis, the percentage of CM was lower [SMD = −1.21; 95% CI (−1.92, −0.50); P = 0.0009; I2 = 91%] and the percentage of IM [SMD = 0.56; 95% CI (0.23, 0.88); P = 0.0008; I2 = 65%] and NCM [SMD = 1.39; 95% CI (0.59, 2.19); P = 0.0007; I2 = 93%] were higher in subjects with cardiometabolic disorders compared to healthy controls. Conclusions: Individuals with cardiometabolic disorders and CVD may have a higher percentage of IM and NCM than healthy controls. Future studies are needed to evaluate the cause and biological significance of this potential altered distribution of monocyte subsets.
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Affiliation(s)
- Ester S Oh
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Muzi Na
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Connie J Rogers
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA, United States.,Center for Molecular Immunology and Infectious Disease, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, United States
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110
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Two Subpopulations of Human Monocytes That Differ by Mitochondrial Membrane Potential. Biomedicines 2021; 9:biomedicines9020153. [PMID: 33557383 PMCID: PMC7915751 DOI: 10.3390/biomedicines9020153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 01/25/2021] [Accepted: 01/30/2021] [Indexed: 11/30/2022] Open
Abstract
Atherosclerosis is associated with a chronic local inflammatory process in the arterial wall. Our previous studies have demonstrated the altered proinflammatory activity of circulating monocytes in patients with atherosclerosis. Moreover, atherosclerosis progression and monocyte proinflammatory activity were associated with mitochondrial DNA (mtDNA) mutations in circulating monocytes. The role of mitochondria in the immune system cells is currently well recognized. They can act as immunomodulators by releasing molecules associated with bacterial infection. We hypothesized that atherosclerosis can be associated with changes in the mitochondrial function of circulating monocytes. To test this hypothesis, we performed live staining of the mitochondria of CD14+ monocytes from healthy donors and atherosclerosis patients with MitoTracker Orange CMTMRos dye, which is sensitive to mitochondrial membrane potential. The intensity of such staining reflects mitochondrial functional activity. We found that parts of monocytes in the primary culture were characterized by low MitoTracker staining (MitoTracker-low monocytes). Such cells were morphologically similar to cells with normal staining and able to metabolize 5-aminolevulinic acid and accumulate the heme precursor protoporphyrin IX (PplX), indicative of partially preserved mitochondrial function. We assessed the proportion of MitoTracker-low monocytes in the primary culture for each study subject and compared the results with other parameters, such as monocyte ability to lipopolysaccharide (LPS)-induced proinflammatory activation and the intima-media thickness of carotid arteries. We found that the proportion of MitoTracker-low monocytes was associated with the presence of atherosclerotic plaques. An increased number of such monocytes in the primary culture was associated with a reduced proinflammatory activation ability of cells. The obtained results indicate the presence of circulating monocytes with mitochondrial dysfunction and the association of such cells with chronic inflammation and atherosclerosis development.
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111
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Lee KS, Lin S, Copland DA, Dick AD, Liu J. Cellular senescence in the aging retina and developments of senotherapies for age-related macular degeneration. J Neuroinflammation 2021; 18:32. [PMID: 33482879 PMCID: PMC7821689 DOI: 10.1186/s12974-021-02088-0] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/15/2021] [Indexed: 12/16/2022] Open
Abstract
Age-related macular degeneration (AMD), a degenerative disease in the central macula area of the neuroretina and the supporting retinal pigment epithelium, is the most common cause of vision loss in the elderly. Although advances have been made, treatment to prevent the progressive degeneration is lacking. Besides the association of innate immune pathway genes with AMD susceptibility, environmental stress- and cellular senescence-induced alterations in pathways such as metabolic functions and inflammatory responses are also implicated in the pathophysiology of AMD. Cellular senescence is an adaptive cell process in response to noxious stimuli in both mitotic and postmitotic cells, activated by tumor suppressor proteins and prosecuted via an inflammatory secretome. In addition to physiological roles in embryogenesis and tissue regeneration, cellular senescence is augmented with age and contributes to a variety of age-related chronic conditions. Accumulation of senescent cells accompanied by an impairment in the immune-mediated elimination mechanisms results in increased frequency of senescent cells, termed “chronic” senescence. Age-associated senescent cells exhibit abnormal metabolism, increased generation of reactive oxygen species, and a heightened senescence-associated secretory phenotype that nurture a proinflammatory milieu detrimental to neighboring cells. Senescent changes in various retinal and choroidal tissue cells including the retinal pigment epithelium, microglia, neurons, and endothelial cells, contemporaneous with systemic immune aging in both innate and adaptive cells, have emerged as important contributors to the onset and development of AMD. The repertoire of senotherapeutic strategies such as senolytics, senomorphics, cell cycle regulation, and restoring cell homeostasis targeted both at tissue and systemic levels is expanding with the potential to treat a spectrum of age-related diseases, including AMD.
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Affiliation(s)
- Keng Siang Lee
- Bristol Medical School, Translational Health Sciences, University of Bristol, Bristol, BS8 1TD, UK
| | - Shuxiao Lin
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | - David A Copland
- Bristol Medical School, Translational Health Sciences, University of Bristol, Bristol, BS8 1TD, UK
| | - Andrew D Dick
- Bristol Medical School, Translational Health Sciences, University of Bristol, Bristol, BS8 1TD, UK. .,Institute of Ophthalmology, University College London, London, EC1V 9EL, UK. .,National Institute for Health Research Biomedical Research Centre, Moorfields Eye Hospital, London, EC1V 2QH, UK.
| | - Jian Liu
- Bristol Medical School, Translational Health Sciences, University of Bristol, Bristol, BS8 1TD, UK.
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Teer E, Joseph DE, Glashoff RH, Faadiel Essop M. Monocyte/Macrophage-Mediated Innate Immunity in HIV-1 Infection: From Early Response to Late Dysregulation and Links to Cardiovascular Diseases Onset. Virol Sin 2021; 36:565-576. [PMID: 33400091 DOI: 10.1007/s12250-020-00332-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/26/2020] [Indexed: 12/11/2022] Open
Abstract
Although monocytes and macrophages are key mediators of the innate immune system, the focus has largely been on the role of the adaptive immune system in the context of human immunodeficiency virus (HIV) infection. Thus more attention and research work regarding the innate immune system-especially the role of monocytes and macrophages during early HIV-1 infection-is required. Blood monocytes and tissue macrophages are both susceptible targets of HIV-1 infection, and the early host response can determine whether the nature of the infection becomes pathogenic or not. For example, monocytes and macrophages can contribute to the HIV reservoir and viral persistence, and influence the initiation/extension of immune activation and chronic inflammation. Here the expansion of monocyte subsets (classical, intermediate and non-classical) provide an increased understanding of the crucial role they play in terms of chronic inflammation and also by increasing the risk of coagulation during HIV-1 infection. This review discusses the role of monocytes and macrophages during HIV-1 pathogenesis, starting from the early response to late dysregulation that occurs as a result of persistent immune activation and chronic inflammation. Such changes are also linked to downstream targets such as increased coagulation and the onset of cardiovascular diseases.
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Affiliation(s)
- Eman Teer
- Centre for Cardio-metabolic Research in Africa (CARMA), Department of Physiological Sciences, Stellenbosch University, Stellenbosch, 7600, South Africa
| | - Danzil E Joseph
- Centre for Cardio-metabolic Research in Africa (CARMA), Department of Physiological Sciences, Stellenbosch University, Stellenbosch, 7600, South Africa
| | - Richard H Glashoff
- Division of Medical Microbiology & Immunology, Department of Pathology, Stellenbosch University and NHLS, Cape Town, 7505, South Africa
| | - M Faadiel Essop
- Centre for Cardio-metabolic Research in Africa (CARMA), Department of Physiological Sciences, Stellenbosch University, Stellenbosch, 7600, South Africa.
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113
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Pence BD. Recent developments and future perspectives in aging and macrophage immunometabolism. AIMS MOLECULAR SCIENCE 2021. [DOI: 10.3934/molsci.2021015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
<abstract>
<p>Aging is the strongest contributor to the development and severity of many chronic and infectious diseases, primarily through age-related increases in low-grade inflammation (inflammaging) and decreases in immune function (immunosenescence). Metabolic reprogramming in immune cells is a significant contributor to functional and phenotypic changes in these cells, but little is known about the direct effect of aging on immunometabolism. This review highlights several recent advances in this field, focusing on mitochondrial dysfunction, NAD+ metabolism, and therapeutic reprogramming in aged monocytes and macrophages. Perspectives on opportunities for future research in this area are also provided. Targeting immunometabolism is a promising strategy for designing therapeutics for a wide variety of age-related diseases.</p>
</abstract>
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114
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Truong R, Thankam FG, Agrawal DK. Immunological mechanisms underlying sterile inflammation in the pathogenesis of atherosclerosis: potential sites for intervention. Expert Rev Clin Immunol 2020; 17:37-50. [PMID: 33280442 DOI: 10.1080/1744666x.2020.1860757] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Introduction: Innate and adaptive immunity play a critical role in the underlying pathological mechanisms of atherosclerosis and potential target sites of sterile inflammation open opportunities to develop novel therapeutics. In response to oxidized LDL in the intimal layer, T cell subsets are recruited and activated at the site of atheroma to upregulate pro-atherogenic cytokines which exacerbate plaque formation instability.Areas covered: A systematic search of PubMed and the Web of Science was performed between January 2001- September 2020 and relevant articles in sterile inflammation and atherosclerosis were critically reviewed. The original information was collected on the interconnection between danger associated molecular patterns (DAMPs) as the mediators of sterile inflammation and the receptor complex of CD36-TLR4-TLR6 that primes and activates inflammasomes in the pathophysiology of atherosclerosis. Mediators of sterile inflammation are identified to target therapeutic strategies in the management of atherosclerosis.Expert opinion: Sterile inflammation via NLRP3 inflammasome is perpetuated by the activation of IL-1β and IL-18 and induction of pyroptosis resulting in the release of additional inflammatory cytokines and DAMPs. Challenges with current inhibitors of the NLRP3 inflammasome lie in the specificity, stability, and efficacy in targeting the NLRP3 inflammasome constituents without ameliorating upstream or downstream responses necessary for survival.
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Affiliation(s)
- Roland Truong
- Department of Translational Research, Western University of Health Sciences, Pomona, CA, USA
| | - Finosh G Thankam
- Department of Translational Research, Western University of Health Sciences, Pomona, CA, USA
| | - Devendra K Agrawal
- Department of Translational Research, Western University of Health Sciences, Pomona, CA, USA
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115
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De Maeyer RPH, Chambers ES. The impact of ageing on monocytes and macrophages. Immunol Lett 2020; 230:1-10. [PMID: 33309673 DOI: 10.1016/j.imlet.2020.12.003] [Citation(s) in RCA: 115] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 12/12/2022]
Abstract
Ageing is a global burden. Increasing age is associated with increased incidence of infections and cancer and decreased vaccine efficacy. This increased morbidity observed with age, is believed to be due in part to a decline in adaptive immunity, termed immunosenescence. However not all aspects of immunity decrease with age as ageing presents with systemic low grade chronic inflammation, characterised by elevated concentrations of mediators such as IL-6, TNFα and C Reactive protein (CRP). Inflammation is a strong predictor of morbidity and mortality, and chronic inflammation is known to be detrimental to a functioning immune system. Although the source of the inflammation is much discussed, the key cells which are believed to facilitate the inflammageing phenomenon are the monocytes and macrophages. In this review we detail how macrophage and monocyte phenotype and function change with age. The impact of ageing on macrophages includes decreased phagocytosis and immune resolution, increased senescent-associated markers, increased inflammatory cytokine production, reduced autophagy, and a decrease in TLR expression. With monocytes there is an increase in circulating CD16+ monocytes, decreased type I IFN production, and decreased efferocytosis. In conclusion, we believe that monocytes and macrophages contribute to immunosenescence and inflammageing and as a result have an important role in defective immunity with age.
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Affiliation(s)
| | - Emma S Chambers
- Centre of Immunobiology, Blizard Institute, Queen Mary University of London, London, UK.
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116
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Oras A, Quirant‐Sanchez B, Popadic D, Thunberg S, Winqvist O, Heck S, Cwikowski M, Riemann D, Seliger B, Martinez Caceres E, Uibo R, Giese T. Comprehensive flow cytometric reference intervals of leukocyte subsets from six study centers across Europe. Clin Exp Immunol 2020; 202:363-378. [PMID: 32654132 PMCID: PMC7670136 DOI: 10.1111/cei.13491] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/30/2020] [Accepted: 07/03/2020] [Indexed: 12/14/2022] Open
Abstract
A group of European FOCIS Centers of Excellence adapted panels of the Human Immunophenotyping Consortium (HIPC) for whole blood analysis. Using four core panels [T/regulatory T cell/B/natural killer (T/Treg /B/NK) and myeloid cells] the main leukocyte populations were analyzed in a clinical-diagnostic setting in a harmonized manner across different platforms. As a first step, the consortium presents here the absolute and relative frequencies of the leukocyte subpopulations in the peripheral blood of more than 300 healthy volunteers across six different European centers.
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Affiliation(s)
- A. Oras
- Department of ImmunologyInstitute of Biomedicine and Translational MedicineUniversity of TartuTartuEstonia
| | - B. Quirant‐Sanchez
- Immunology DivisionLCMNGermans Trias i Pujol University Hospital and Research InstituteBarcelonaSpain
- Department of Cell Biology, Physiology and ImmunologyUniversitat Autonoma BarcelonaBarcelonaSpain
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
| | - D. Popadic
- Institute of Microbiology and ImmunologySchool of MedicineUniversity of BelgradeBelgradeSerbia
| | - S. Thunberg
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
- Unit of Immunology and AllergyKarolinska University HospitalStockholmSweden
| | - O. Winqvist
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
- Unit of Immunology and AllergyKarolinska University HospitalStockholmSweden
| | - S. Heck
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
- NIHR GSTT/KCL Comprehensive Biomedical Research CentreGuy’s & St Thomas’ NHS Foundation TrustLondonUK
| | - M. Cwikowski
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
- Institute of Medical ImmunologyMartin‐Luther‐University Halle‐WittenbergHalle/SaaleGermany
| | - D. Riemann
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
- Institute of Medical ImmunologyMartin‐Luther‐University Halle‐WittenbergHalle/SaaleGermany
| | - B. Seliger
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
- Institute of Medical ImmunologyMartin‐Luther‐University Halle‐WittenbergHalle/SaaleGermany
| | - E. Martinez Caceres
- Immunology DivisionLCMNGermans Trias i Pujol University Hospital and Research InstituteBarcelonaSpain
- Department of Cell Biology, Physiology and ImmunologyUniversitat Autonoma BarcelonaBarcelonaSpain
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
| | - R. Uibo
- Department of ImmunologyInstitute of Biomedicine and Translational MedicineUniversity of TartuTartuEstonia
| | - T. Giese
- Federation of Clinical Immunology Societies (FOCIS) Center of Excellence
- Institute of ImmunologyHeidelberg University HospitalGerman Center for Infection Research (DZIF)Partner siteHeidelbergGermany
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117
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Khan M, Zhao Z, Arooj S, Fu Y, Liao G. Soluble PD-1: Predictive, Prognostic, and Therapeutic Value for Cancer Immunotherapy. Front Immunol 2020; 11:587460. [PMID: 33329567 PMCID: PMC7710690 DOI: 10.3389/fimmu.2020.587460] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 10/16/2020] [Indexed: 12/13/2022] Open
Abstract
Programmed death protein 1 (PD-1) interaction with PD-L1 deliver immunosuppressive environment for tumor growth, and its blockade with directed monoclonal antibodies (anti-PD-1/anti-PD-L1) has shown remarkable clinical outcome. Lately, their soluble counterparts, sPD-1 and sPD-L1, have been detected in plasma, and elevated levels have been associated with advanced disease, clinical stages, and worst prognosis for cancer patients. Elevated plasma levels of sPD-L1 have been correlated with worst prognosis in several studies and has displayed a persistent outlook. On the other hand, sPD-1 levels have been inconsistent in their predictive and prognostic ability. Pretherapeutic higher sPD-1 plasma levels have shown to predict advanced disease state and to a lesser extent worst prognosis. Any increase in sPD-1 plasma level post therapeutically have been correlated with improved survival for various cancers. In vitro and in vivo studies have shown sPD-1 ability to bind PD-L1 and PD-L2 and block PD-1/PD-L1 interaction. Local delivery of sPD-1 in cancer tumor microenvironment through local gene therapy have demonstrated an increase in tumor specific CD8+ T cell immunity and tumor growth reduction. It had also exhibited enhancement of T cell immunity induced by vaccination and other gene therapeutic agents. Furthermore, it may also lessen the inhibitory effect of circulating sPD-L1 and enhance the effects of mAb-based immunotherapy. In this review, we highlight various aspects of sPD-1 role in cancer prediction, prognosis, and anti-cancer immunity, as well as, its therapeutic value for local gene therapy or systemic immunotherapy in blocking the PD-1 and PD-L1 checkpoint interactions.
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Affiliation(s)
- Muhammad Khan
- Department of Radiation Oncology, Shenzhen People's Hospital, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen, China.,Department of Oncology, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zhihong Zhao
- Department of Nephrology, Shenzhen People's Hospital, Second Clinical Medicine Centre, Jinan University, Shenzhen, China
| | - Sumbal Arooj
- Department of Radiation Oncology, Shenzhen People's Hospital, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen, China.,Department of Biochemistry, University of Sialkot, Sialkot, Pakistan
| | - Yuxiang Fu
- Department of Radiation Oncology, Shenzhen People's Hospital, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen, China
| | - Guixiang Liao
- Department of Radiation Oncology, Shenzhen People's Hospital, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen, China
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118
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Raucci A, Vinci MC. miR-34a: A Promising Target for Inflammaging and Age-Related Diseases. Int J Mol Sci 2020; 21:ijms21218293. [PMID: 33167452 PMCID: PMC7663903 DOI: 10.3390/ijms21218293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 11/03/2020] [Indexed: 01/13/2023] Open
Affiliation(s)
- Angela Raucci
- Unit of Experimental Cardio-Oncology and Cardiovascular Aging, Centro Cardiologico Monzino-IRCCS, Via Carlo Parea 4, 20138 Milan, Italy
- Correspondence: (A.R.); (M.C.V.); Tel.: +39-02-5800-2802 (A.R.); +39-02-5800-2028 (M.C.V.); Fax: +39-02-5800-2342 (A.R. & M.C.V.)
| | - Maria Cristina Vinci
- Unit of Vascular Biology and Regenerative Medicine, Centro Cardiologico Monzino-IRCCS, Via Carlo Parea 4, 20138 Milan, Italy
- Correspondence: (A.R.); (M.C.V.); Tel.: +39-02-5800-2802 (A.R.); +39-02-5800-2028 (M.C.V.); Fax: +39-02-5800-2342 (A.R. & M.C.V.)
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119
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Whole-Body Vibration as Antihypertensive Non-Pharmacological Treatment in Hypertensive Individuals with Knee Osteoarthritis: Randomized Cross-Over Trial. SUSTAINABILITY 2020. [DOI: 10.3390/su12218944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
(1) Background: Hypertension is a serious medical condition characterized by a persistent increase in blood pressure (BP), which is prevalent in individuals with knee osteoarthritis (KOA). Pharmacological interventions are normally used to treat both hypertension and KOA; however, a more sustainable form of treatment is desirable for these clinical conditions. Whole-body vibration (WBV) exercise has been proposed as a non-pharmacological therapy for reducing both BP and KOA symptomatology. This study aimed to evaluate the antihypertensive effect of WBV in hypertensive individuals with KOA. (2) Methods: Nineteen hypertensive individuals with KOA were randomly allocated to either a control (CG) (n = 9) or a WBV group (WBVG) (n = 10). Subjects in the WBVG were positioned sitting in a chair in front of a vibrating platform (VP) with the feet on the base (peak-to-peak displacement 2.5, 5.0 and 7.5 mm; frequencies 5 to 14 Hz). In the CG, subjects assumed the same position with the VP turned off. The protocols in the CG and WBVG were performed 2 days/week for a total of 5 weeks. (3) Results: No baseline differences (age, anthropometrics, BP parameters and medications) between the groups were found (p > 0.05). WBV exercise reduced systolic BP (SBP: 126.1 ± 2.7 versus 119.1 ± 3.2 mmHg; p = 0.001; post hoc: p = 0.02; F = 23.97) and mean BP (MBP: 82.6 ± 1.8 versus 78.7 ± 1.8, p = 0.001, post hoc: p = 0.02; F = 23.97), while no significant changes were found in diastolic BP (DBP: 68.5 ± 2.2 versus 64.4 ± 2.3; p = 0.11; F = 2.68). (4) Conclusions: WBV might be considered a sustainable therapy for exerting an antihypertensive effect in medicated hypertensive individuals with KOA. This decline in BP might translate to a reduction in pharmacological need, although further studies are necessary to understand the mechanisms underlying the described effect.
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120
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Hazeldine J, Lord JM. Immunesenescence: A Predisposing Risk Factor for the Development of COVID-19? Front Immunol 2020; 11:573662. [PMID: 33123152 PMCID: PMC7573102 DOI: 10.3389/fimmu.2020.573662] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/28/2020] [Indexed: 01/08/2023] Open
Abstract
Bearing a strong resemblance to the phenotypic and functional remodeling of the immune system that occurs during aging (termed immunesenescence), the immune response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of Coronavirus disease 2019 (COVID-19), is characterized by an expansion of inflammatory monocytes, functional exhaustion of lymphocytes, dysregulated myeloid responses and the presence of highly activated senescent T cells. Alongside advanced age, male gender and pre-existing co-morbidities [e.g., obesity and type 2 diabetes (T2D)] are emerging as significant risk factors for COVID-19. Interestingly, immunesenescence is more profound in males when compared to females, whilst accelerated aging of the immune system, termed premature immunesenescence, has been described in obese subjects and T2D patients. Thus, as three distinct demographic groups with an increased susceptibility to COVID-19 share a common immune profile, could immunesenescence be a generic contributory factor in the development of severe COVID-19? Here, by focussing on three key aspects of an immune response, namely pathogen recognition, elimination and resolution, we address this question by discussing how immunesenescence may weaken or exacerbate the immune response to SARS-CoV-2. We also highlight how aspects of immunesenescence could render potential COVID-19 treatments less effective in older adults and draw attention to certain therapeutic options, which by reversing or circumventing certain features of immunesenescence may prove to be beneficial for the treatment of groups at high risk of severe COVID-19.
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Affiliation(s)
- Jon Hazeldine
- Medical Research Council-Versus Arthritis Centre for Musculoskeletal Ageing Research, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, United Kingdom
- National Institute for Health Research Surgical Reconstruction and Microbiology Research Centre, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom
| | - Janet M. Lord
- Medical Research Council-Versus Arthritis Centre for Musculoskeletal Ageing Research, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, United Kingdom
- National Institute for Health Research Surgical Reconstruction and Microbiology Research Centre, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom
- National Institute for Health Research Birmingham Biomedical Research Centre, University Hospital Birmingham National Health Service Foundation Trust and University of Birmingham, Birmingham, United Kingdom
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121
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Krychtiuk KA, Lenz M, Richter B, Hohensinner PJ, Kastl SP, Mangold A, Huber K, Hengstenberg C, Wojta J, Heinz G, Speidl WS. Monocyte subsets predict mortality after cardiac arrest. J Leukoc Biol 2020; 109:1139-1146. [PMID: 33020969 PMCID: PMC8247267 DOI: 10.1002/jlb.5a0420-231rr] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 12/12/2022] Open
Abstract
After successful cardiopulmonary resuscitation (CPR), many patients show signs of an overactive immune activation. Monocytes are a heterogeneous cell population that can be distinguished into 3 subsets by flow cytometry (classical monocytes [CM: CD14++CD16‐], intermediate monocytes [IM: CD14++CD16+CCR2+] and non‐classical monocytes [NCM: CD14+CD16++CCR2‐]). Fifty‐three patients admitted to the medical intensive care unit (ICU) after cardiac arrest were included. Blood was taken on admission and after 72 h. The primary endpoint of this study was survival at 6 months and the secondary endpoint was neurological outcome as determined by cerebral performance category (CPC)‐score at 6 months. Median age was 64.5 (49.8‐74.3) years and 75.5% were male. Six‐month mortality was 50.9% and survival with good neurological outcome was 37.7%. Monocyte subset distribution upon admission to the ICU did not differ according to survival. Seventy‐two hours after admission, patients who died within 6 months showed a higher percentage of the pro‐inflammatory subset of IM (8.3% [3.8‐14.6]% vs. 4.1% [1.5–8.2]%; P = 0.025), and a lower percentage of CM (87.5% [79.9–89.0]% vs. 90.8% [85.9–92.7]%; P = 0.036) as compared to survivors. In addition, IM were predictive of outcome independent of time to ROSC and witnessed cardiac arrest, and correlated with CPC‐score at 6 months (R = 0.32; P = 0.043). These findings suggest a possible role of the innate immune system in the pathophysiology of post cardiac arrest syndrome.
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Affiliation(s)
- Konstantin A Krychtiuk
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Max Lenz
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Bernhard Richter
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Philipp J Hohensinner
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Stefan P Kastl
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Andreas Mangold
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Kurt Huber
- Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria.,3rd Medical Department, Wilhelminen Hospital, Vienna, Austria
| | - Christian Hengstenberg
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Johann Wojta
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria.,Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria.,Core Facilities, Medical University of Vienna, Vienna, Austria
| | - Gottfried Heinz
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Walter S Speidl
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
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122
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Zheng Y, Liu X, Le W, Xie L, Li H, Wen W, Wang S, Ma S, Huang Z, Ye J, Shi W, Ye Y, Liu Z, Song M, Zhang W, Han JDJ, Belmonte JCI, Xiao C, Qu J, Wang H, Liu GH, Su W. A human circulating immune cell landscape in aging and COVID-19. Protein Cell 2020; 11:740-770. [PMID: 32780218 PMCID: PMC7417788 DOI: 10.1007/s13238-020-00762-2] [Citation(s) in RCA: 167] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 07/01/2020] [Indexed: 12/21/2022] Open
Abstract
Age-associated changes in immune cells have been linked to an increased risk for infection. However, a global and detailed characterization of the changes that human circulating immune cells undergo with age is lacking. Here, we combined scRNA-seq, mass cytometry and scATAC-seq to compare immune cell types in peripheral blood collected from young and old subjects and patients with COVID-19. We found that the immune cell landscape was reprogrammed with age and was characterized by T cell polarization from naive and memory cells to effector, cytotoxic, exhausted and regulatory cells, along with increased late natural killer cells, age-associated B cells, inflammatory monocytes and age-associated dendritic cells. In addition, the expression of genes, which were implicated in coronavirus susceptibility, was upregulated in a cell subtype-specific manner with age. Notably, COVID-19 promoted age-induced immune cell polarization and gene expression related to inflammation and cellular senescence. Therefore, these findings suggest that a dysregulated immune system and increased gene expression associated with SARS-CoV-2 susceptibility may at least partially account for COVID-19 vulnerability in the elderly.
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Affiliation(s)
- Yingfeng Zheng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Xiuxing Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Wenqing Le
- Department of Critical Care, Wuhan Hankou Hospital, Wuhan, 430012, China
| | - Lihui Xie
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - He Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Wen Wen
- National Center for Liver Cancer, Second Military Medical University, Shanghai, 200433, China
| | - Si Wang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, CAS, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Advanced Innovation Center for Human Brain Protection, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital Capital Medical University, Beijing, 100053, China
| | - Shuai Ma
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, CAS, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhaohao Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Jinguo Ye
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Wen Shi
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Yanxia Ye
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Zunpeng Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Moshi Song
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, CAS, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weiqi Zhang
- Institute for Stem Cell and Regeneration, CAS, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, China
- China National Center for Bioinformation, Beijing, 100101, China
| | - Jing-Dong J Han
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Center for Quantitative Biology (CQB), Peking University, Beijing, 100871, China
| | | | - Chuanle Xiao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Jing Qu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- Institute for Stem Cell and Regeneration, CAS, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Hongyang Wang
- National Center for Liver Cancer, Second Military Medical University, Shanghai, 200433, China.
| | - Guang-Hui Liu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- Institute for Stem Cell and Regeneration, CAS, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
- Advanced Innovation Center for Human Brain Protection, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital Capital Medical University, Beijing, 100053, China.
| | - Wenru Su
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China.
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Tavenier J, Rasmussen LJH, Houlind MB, Andersen AL, Panum I, Andersen O, Petersen J, Langkilde A, Nehlin JO. Alterations of monocyte NF-κB p65/RelA signaling in a cohort of older medical patients, age-matched controls, and healthy young adults. Immun Ageing 2020; 17:25. [PMID: 33685482 PMCID: PMC7938715 DOI: 10.1186/s12979-020-00197-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/12/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Altered monocyte NF-κB signaling is a possible cause of inflammaging and driver of aging, however, evidence from human aging studies is sparse. We assessed monocyte NF-κB signaling across different aging trajectories by comparing healthy older adults to older adults with a recent emergency department (ED) admission and to young adults. METHODS We used data from: 52 older (≥65 years) Patients collected upon ED admission and at follow-up 30-days after discharge; 52 age- and sex-matched Older Controls without recent hospitalization; and 60 healthy Young Controls (20-35 years). Using flow cytometry, we assessed basal NF-κB phosphorylation (pNF-κB p65/RelA; Ser529) and induction of pNF-κB following stimulation with LPS or TNF-α in monocytes. We assessed frailty (FI-OutRef), physical and cognitive function, and plasma levels of IL-6, IL-18, TNF-α, and soluble urokinase plasminogen activator receptor. RESULTS Patients at follow-up were frailer, had higher levels of inflammatory markers and decreased physical and cognitive function than Older Controls. Patients at follow-up had higher basal pNF-κB levels than Older Controls (median fluorescence intensity (MFI): 125, IQR: 105-153 vs. MFI: 80, IQR: 71-90, p < 0.0001), and reduced pNF-κB induction in response to LPS (mean pNF-κB MFI fold change calculated as the log10 ratio of LPS-stimulation to the PBS-control: 0.10, 95% CI: 0.08 to 0.12 vs. 0.13, 95% CI: 0.10 to 0.15, p = 0.05) and TNF-α stimulation (0.02, 95% CI: - 0.00 to 0.05 vs. 0.10, 95% CI: 0.08 to 0.12, p < 0.0001). Older Controls had higher levels of inflammatory markers than Young Controls, but basal pNF-κB MFI did not differ between Older and Young Controls (MFI: 81, IQR: 70-86; p = 0.72). Older Controls had reduced pNF-κB induction in response to LPS and TNF-α compared to Young Controls (LPS: 0.40, 95% CI: 0.35 to 0.44, p < 0.0001; and TNF-α: 0.33, 95% CI: 0.27 to 0.40, p < 0.0001). In Older Controls, basal pNF-κB MFI was associated with FI-OutRef (p = 0.02). CONCLUSIONS Increased basal pNF-κB activity in monocytes could be involved in the processes of frailty and accelerated aging. Furthermore, we show that monocyte NF-κB activation upon stimulation was impaired in frail older adults, which could result in reduced immune responses and vaccine effectiveness.
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Affiliation(s)
- Juliette Tavenier
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark.
| | - Line Jee Hartmann Rasmussen
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark
- Department of Psychology and Neuroscience, Duke University, Durham, NC, 27708, USA
| | - Morten Baltzer Houlind
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark
- The Capital Region Pharmacy, 2730, Herlev, Denmark
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Aino Leegaard Andersen
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark
| | - Inge Panum
- Department of Clinical Microbiology, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark
| | - Ove Andersen
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark.
- Emergency Department, Copenhagen University Hospital Amager and Hvidovre, 2650, Hvidovre, Denmark.
- Department of Clinical Medicine, University of Copenhagen, 2200, Copenhagen, Denmark.
| | - Janne Petersen
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark
- Center for Clinical Research and Prevention, Copenhagen University Hospital, 2000, Frederiksberg, Denmark
- Section of Biostatistics, Department of Public Health, University of Copenhagen, 1014, Copenhagen, Denmark
| | - Anne Langkilde
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark
| | - Jan O Nehlin
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, 2650, Hvidovre, Denmark
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Abstract
The ongoing pandemic severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) causes a disproportionate number of severe cases and deaths in older adults. Severe SARS-CoV-2-associated disease (coronavirus disease 2019 (COVID-19)) was declared a pandemic by the World Health Organization in March 2020 and is characterized by cytokine storm, acute respiratory distress syndrome, and in some cases by systemic inflammation-related pathology. Currently, our knowledge of the determinants of severe COVID-19 is primarily observational. Here, I review emerging evidence to argue that monocytes, a circulating innate immune cell, are principal players in cytokine storm and associated pathologies in COVID-19. I also describe changes in monocyte function and phenotype that are characteristic of both aging and severe COVID-19, which suggests a potential mechanism underlying increased morbidity and mortality due to SARS-CoV-2 infection in older adults. The innate immune system is therefore a potentially important target for therapeutic treatment of COVID-19, but experimental studies are needed, and SARS-CoV-2 presents unique challenges for pre-clinical and mechanistic studies in vivo. The immediate establishment of colonies of SARS-CoV-2-susceptible animal models for aging studies, as well as strong collaborative efforts in the geroscience community, will be required in order to develop the therapies needed to combat severe COVID-19 in older adult populations.
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Affiliation(s)
- Brandt D Pence
- School of Health Studies, University of Memphis, Memphis, TN, 38152, USA.
- Center for Nutraceutical and Dietary Supplement Research, University of Memphis, Memphis, TN, 38152, USA.
- University of Memphis, 304 Elma Roane Fieldhouse, 495 Zach H. Curlin St., Memphis, TN, 38152, USA.
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Hoffmann J, Mas-Peiro S, Berkowitsch A, Boeckling F, Rasper T, Pieszko K, De Rosa R, Hiczkiewicz J, Burchardt P, Fichtlscherer S, Zeiher AM, Dimmeler S, Nicotera MV. Inflammatory signatures are associated with increased mortality after transfemoral transcatheter aortic valve implantation. ESC Heart Fail 2020; 7:2597-2610. [PMID: 32639677 PMCID: PMC7524092 DOI: 10.1002/ehf2.12837] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 01/24/2023] Open
Abstract
Aims Systemic inflammatory response, identified by increased total leucocyte counts, was shown to be a strong predictor of mortality after transcatheter aortic valve implantation (TAVI). Yet the mechanisms of inflammation‐associated poor outcome after TAVI are unclear. Therefore, the present study aimed at investigating individual inflammatory signatures and functional heterogeneity of circulating myeloid and T‐lymphocyte subsets and their impact on 1 year survival in a single‐centre cohort of patients with severe aortic stenosis undergoing TAVI. Methods and results One hundred twenty‐nine consecutive patients with severe symptomatic aortic stenosis admitted for transfemoral TAVI were included. Blood samples were obtained at baseline, immediately after, and 24 h and 3 days after TAVI, and these were analysed for inflammatory and cardiac biomarkers. Myeloid and T‐lymphocyte subsets were measured using flow cytometry. The inflammatory parameters were first analysed as continuous variables; and in case of association with outcome and area under receiver operating characteristic (ROC) curve (AUC) ≥ 0.6, the values were dichotomized using optimal cut‐off points. Several baseline inflammatory parameters, including high‐sensitivity C‐reactive protein (hsCRP; HR = 1.37, 95% CI: 1.15–1.63; P < 0.0001) and IL‐6 (HR = 1.02, 95% CI: 1.01–1.03; P = 0.003), lower counts of Th2 (HR = 0.95, 95% CI: 0.91–0.99; P = 0.009), and increased percentages of Th17 cells (HR = 1.19, 95% CI: 1.02–1.38; P = 0.024) were associated with 12 month all‐cause mortality. Among postprocedural parameters, only increased post‐TAVI counts of non‐classical monocytes immediately after TAVI were predictive of outcome (HR = 1.03, 95% CI: 1.01–1.05; P = 0.003). The occurrence of SIRS criteria within 48 h post‐TAVI showed no significant association with 12 month mortality (HR = 0.57, 95% CI: 0.13–2.43, P = 0.45). In multivariate analysis of discrete or dichotomized clinical and inflammatory variables, the presence of diabetes mellitus (HR = 3.50; 95% CI: 1.42–8.62; P = 0.006), low left ventricular (LV) ejection fraction (HR = 3.16; 95% CI: 1.35–7.39; P = 0.008), increased baseline hsCRP (HR = 5.22; 95% CI: 2.09–13.01; P < 0.0001), and low baseline Th2 cell counts (HR = 8.83; 95% CI: 3.02–25.80) were significant predictors of death. The prognostic value of the linear prediction score calculated of these parameters was superior to the Society of Thoracic Surgeons score (AUC: 0.88; 95% CI: 0.78–0.99 vs. 0.75; 95% CI: 0.64–0.86, respectively; P = 0.036). Finally, when analysing LV remodelling outcomes, ROC curve analysis revealed that low numbers of Tregs (P = 0.017; AUC: 0.69) and increased Th17/Treg ratio (P = 0.012; AUC: 0.70) were predictive of adverse remodelling after TAVI. Conclusions Our findings demonstrate an association of specific pre‐existing inflammatory phenotypes with increased mortality and adverse LV remodelling after TAVI. Distinct monocyte and T‐cell signatures might provide additive biomarkers to improve pre‐procedural risk stratification in patients referred to TAVI for severe aortic stenosis.
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Affiliation(s)
- Jedrzej Hoffmann
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhine-Main, Germany
| | - Silvia Mas-Peiro
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhine-Main, Germany
| | - Alexander Berkowitsch
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Felicitas Boeckling
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhine-Main, Germany
| | - Tina Rasper
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Konrad Pieszko
- Department of Cardiology, Nowa Sól Multidisciplinary Hospital, Nowa Sól, Poland.,Faculty of Medicine and Health Sciences, University of Zielona Góra, Zielona Góra, Poland
| | - Roberta De Rosa
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Jarosław Hiczkiewicz
- Department of Cardiology, Nowa Sól Multidisciplinary Hospital, Nowa Sól, Poland.,Faculty of Medicine and Health Sciences, University of Zielona Góra, Zielona Góra, Poland
| | - Paweł Burchardt
- Biology of Lipid Disorders Department, Poznan University of Medical Sciences, Poznań, Poland
| | - Stephan Fichtlscherer
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhine-Main, Germany
| | - Andreas M Zeiher
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhine-Main, Germany.,Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
| | - Stefanie Dimmeler
- German Center for Cardiovascular Research (DZHK), Partner site Rhine-Main, Germany.,Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.,Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
| | - Mariuca Vasa Nicotera
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhine-Main, Germany.,Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
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Horzum U, Yoyen-Ermis D, Taskiran EZ, Yilmaz KB, Hamaloglu E, Karakoc D, Esendagli G. CD66b+ monocytes represent a proinflammatory myeloid subpopulation in cancer. Cancer Immunol Immunother 2020; 70:75-87. [DOI: 10.1007/s00262-020-02656-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 06/29/2020] [Indexed: 12/13/2022]
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Wijeyekoon RS, Kronenberg-Versteeg D, Scott KM, Hayat S, Kuan WL, Evans JR, Breen DP, Cummins G, Jones JL, Clatworthy MR, Floto RA, Barker RA, Williams-Gray CH. Peripheral innate immune and bacterial signals relate to clinical heterogeneity in Parkinson's disease. Brain Behav Immun 2020; 87:473-488. [PMID: 32006615 PMCID: PMC7613010 DOI: 10.1016/j.bbi.2020.01.018] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/14/2020] [Accepted: 01/28/2020] [Indexed: 01/09/2023] Open
Abstract
The innate immune system is implicated in Parkinson's disease (PD), but peripheral in-vivo clinical evidence of the components and driving mechanisms involved and their relationship with clinical heterogeneity and progression to dementia remain poorly explored. We examined changes in peripheral innate immune-related markers in PD cases (n = 41) stratified according to risk of developing early dementia. 'Higher Risk'(HR) (n = 23) and 'Lower Risk' (LR) (n = 18) groups were defined according to neuropsychological predictors and MAPT H1/H2 genotype, and compared to age, gender and genotype-matched controls. Monocyte subsets and expression of key surface markers were measured using flow cytometry. Serum markers including alpha-synuclein, inflammasome-related caspase-1 and bacterial translocation-related endotoxin were measured using quantitative immuno-based assays. Specific markers were further investigated using monocyte assays and validated in plasma samples from a larger incident PD cohort (n = 95). We found that classical monocyte frequency was elevated in PD cases compared to controls, driven predominantly by the HR group, in whom Toll-Like Receptor (TLR)4+ monocytes and monocyte Triggering Receptor Expressed on Myeloid cells-2 (TREM2) expression were also increased. Monocyte Human Leukocyte Antigen (HLA)-DR expression correlated with clinical variables, with lower levels associated with worse cognitive/motor performance. Notably, monocyte changes were accompanied by elevated serum bacterial endotoxin, again predominantly in the HR group. Serum alpha-synuclein and inflammasome-related caspase-1 were decreased in PD cases compared to controls regardless of group, with decreased monocyte alpha-synuclein secretion in HR cases. Further, alpha-synuclein and caspase-1 correlated positively in serum and monocyte lysates, and in plasma from the larger cohort, though no associations were seen with baseline or 36-month longitudinal clinical data. Principal Components Analysis of all monocyte and significant serum markers indicated 3 major components. Component 1 (alpha-synuclein, caspase-1, TLR2+ monocytes) differentiated PD cases and controls in both groups, while Component 2 (endotoxin, monocyte TREM2, alpha-synuclein) did so predominantly in the HR group. Component 3 (classical monocytes, alpha-synuclein) also differentiated cases and controls overall in both groups. These findings demonstrate that systemic innate immune changes are present in PD and are greatest in those at higher risk of rapid progression to dementia. Markers associated with PD per-se (alpha-synuclein, caspase-1), differ from those related to cognitive progression and clinical heterogeneity (endotoxin, TREM2, TLR4, classical monocytes, HLA-DR), with mechanistic and therapeutic implications. Alpha-synuclein and caspase-1 are associated, suggesting inflammasome involvement common to all PD, while bacterial translocation associated changes may contribute towards progression to Parkinson's dementia. Additionally, HLA-DR-associated variations in antigen presentation/clearance may modulate existing clinical disease.
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Affiliation(s)
- Ruwani S. Wijeyekoon
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK,Corresponding Author;
| | | | - Kirsten M. Scott
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Shaista Hayat
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Wei-Li Kuan
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Jonathan R. Evans
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK,Nottingham University Hospital NHS Trust, Nottingham, UK
| | - David P. Breen
- Centre for Clinical Brain Sciences, University of Edinburgh, Chancellor’s Building, 49, Little France Crescent, Edinburgh, EH16 4SB, UK,Anne Rowling Regenerative Neurology Clinic, University of Edinburgh, Chancellor’s Building, 49, Little France Crescent, Edinburgh, EH16 4SB, UK,Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, 9, Little France Road, Edinburgh BioQuarter, Edinburgh, EH16 4UX, UK
| | - Gemma Cummins
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Joanne L. Jones
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | | | - R. Andres Floto
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Roger A. Barker
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK,Wellcome Trust-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Caroline H. Williams-Gray
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
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Macrophage Immunometabolism and Inflammaging: Roles of Mitochondrial Dysfunction, Cellular Senescence, CD38, and NAD. ACTA ACUST UNITED AC 2020; 2:e200026. [PMID: 32774895 PMCID: PMC7409778 DOI: 10.20900/immunometab20200026] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aging is a complex process that involves dysfunction on multiple levels, all of which seem to converge on inflammation. Macrophages are intimately involved in initiating and resolving inflammation, and their dysregulation with age is a primary contributor to inflammaging—a state of chronic, low-grade inflammation that develops during aging. Among the age-related changes that occur to macrophages are a heightened state of basal inflammation and diminished or hyperactive inflammatory responses, which seem to be driven by metabolic-dependent epigenetic changes. In this review article we provide a brief overview of mitochondrial functions and age-related changes that occur to macrophages, with an emphasis on how the inflammaging environment, senescence, and NAD decline can affect their metabolism, promote dysregulation, and contribute to inflammaging and age-related pathologies.
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Abstract
Monocytes are circulating innate immune cells that are functionally dysregulated during aging. However, while metabolic regulation of innate immune cell function is now well-established, only a handful of studies have examined this in the context of aging. In a recent article published in Aging Cell, Saare et al. observe comprehensive metabolic reprogramming of otherwise unstimulated monocytes isolated from older adults. These cells display increased glucose uptake and dysregulation of mitochondrial function, concomitant with activation of signaling pathways contributing to increased inflammation. These findings suggest a mechanism whereby metabolic reprogramming in aged monocytes contributes to chronic low-grade inflammation and open new avenues of investigation into the biological underpinning of inflammaging.
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Affiliation(s)
- Brandt D Pence
- School of Health Studies, University of Memphis, Memphis, TN 38152, USA
- Center for Nutraceutical and Dietary Supplement Research, University of Memphis, Memphis, TN 38152, USA
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130
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A Dual Face of APE1 in the Maintenance of Genetic Stability in Monocytes: An Overview of the Current Status and Future Perspectives. Genes (Basel) 2020; 11:genes11060643. [PMID: 32545201 PMCID: PMC7349382 DOI: 10.3390/genes11060643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 12/24/2022] Open
Abstract
Monocytes, which play a crucial role in the immune system, are characterized by an enormous sensitivity to oxidative stress. As they lack four key proteins responsible for DNA damage response (DDR) pathways, they are especially prone to reactive oxygen species (ROS) exposure leading to oxidative DNA lesions and, consequently, ROS-driven apoptosis. Although such a phenomenon is of important biological significance in the regulation of monocyte/macrophage/dendritic cells’ balance, it also a challenge for monocytic mechanisms that have to provide and maintain genetic stability of its own DNA. Interestingly, apurinic/apyrimidinic endonuclease 1 (APE1), which is one of the key proteins in two DDR mechanisms, base excision repair (BER) and non-homologous end joining (NHEJ) pathways, operates in monocytic cells, although both BER and NHEJ are impaired in these cells. Thus, on the one hand, APE1 endonucleolytic activity leads to enhanced levels of both single- and double-strand DNA breaks (SSDs and DSBs, respectively) in monocytic DNA that remain unrepaired because of the impaired BER and NHEJ. On the other hand, there is some experimental evidence suggesting that APE1 is a crucial player in monocytic genome maintenance and stability through different molecular mechanisms, including induction of cytoprotective and antioxidant genes. Here, the dual face of APE1 is discussed.
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Zhang L, Yao Y, Tian J, Jiang W, Zhou S, Chen J, Xu T, Wu M. Alterations and abnormal expression of A20 in peripheral monocyte subtypes in patients with rheumatoid arthritis. Clin Rheumatol 2020; 40:341-348. [PMID: 32488768 DOI: 10.1007/s10067-020-05137-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/21/2020] [Accepted: 05/01/2020] [Indexed: 10/24/2022]
Abstract
As the precursors of macrophages and osteoclasts, monocytes play an important role in the pathogenesis of rheumatoid arthritis (RA). Since the deficiency of zinc-finger protein A20 in myeloid cells triggers erosive polyarthritis resembling RA, A20 in monocytes may play a protective role in RA. In the present study, we aimed to investigate the abnormality of monocyte subtypes and the expression of zinc-finger protein A20 in RA. Peripheral blood mononuclear cells and clinical data were collected from RA patients and healthy controls (HCs). Monocyte subtypes and A20 expression were determined through flow cytometry and compared between the two groups. Correlations between monocyte subtypes, A20 expression, and clinical data were analyzed. A total of 43 RA patients and 23 HCs were included in the present study. RA patients had higher absolute monocyte counts (p < 0.001) in the peripheral blood. The proportions and counts of intermediate monocytes (IMs) (both p < 0.001) and non-classical monocytes (NCMs) were higher (both p < 0.001) in RA patients. The expression of A20 in IMs (p < 0.001) was lower in RA patients compared with that in the HCs. Furthermore, the expression of A20 in IMs was negatively correlated with the anti-cyclic citrullinated peptide (CCP) antibody level in RA patients (r = - 0.409, p = 0.01). The expression of A20 in NCMs was positively correlated with modified total Sharp score (mTSS) in RA patients (r = 0.471, p = 0.02). Collectively, we proved that IMs and NCMs were increased in RA patients, suggesting that they played a suggestive role in the pathogenesis of RA. Furthermore, the downregulation of A20 in IMs might be correlated with anti-CCP antibody production. The A20 expression in NCMs might affect bone erosion in RA. Key Points • IMs and NCMs were increased in the peripheral blood of RA patients, suggesting their pathogenic role in RA. • The decreased expression of zinc-finger protein A20 in IMs of RA patients suggested the protective role of A20 in RA. • The negative correlation between the A20 expression in IMs and anti-CCP antibody revealed that A20 in IMs might be related to the formation of anti-CCP antibodies. • The positive correlation between the A20 expression in NCMs and mTSS revealed that A20 in NCMs might affect the bone erosion in RA.
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Affiliation(s)
- Lu Zhang
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China
| | - Yao Yao
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China
| | - Junmei Tian
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China
| | - Wanlan Jiang
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China
| | - Shiliang Zhou
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China
| | - Jinyun Chen
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China
| | - Ting Xu
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China.
| | - Min Wu
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, People's Republic of China.
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Jaiswal SR, Bhakuni P, Aiyer HM, Soni M, Bansal S, Chakrabarti S. CTLA4Ig in an Extended Schedule along with Sirolimus Improves Outcome with a Distinct Pattern of Immune Reconstitution Following Post-Transplantation Cyclophosphamide-Based Haploidentical Transplantation for Hemoglobinopathies. Biol Blood Marrow Transplant 2020; 26:1469-1476. [PMID: 32428732 DOI: 10.1016/j.bbmt.2020.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 05/06/2020] [Accepted: 05/06/2020] [Indexed: 01/24/2023]
Abstract
The major hindrances to the success of a haploidentical hematopoietic cell transplantation for hemoglobinopathies are graft failure, early post-transplant hemophagocytic syndrome (PTHPS), and graft-versus-host disease (GVHD). Following the successful incorporation of CTLA4Ig (abatacept) in post-transplantation cyclophosphamide-based haploidentical transplantation, we piloted this approach in 10 patients (aged 3 to 19 years), with thalassemia major (TM, n=5) and sickle cell disease (n = 5). Pretransplant immunosuppressive therapy (pTIST) was administered for 10 weeks. Conditioning was myeloablative. CTLA4Ig was administered every 2 weeks during pTIST and on days -1, +5, +20, and +35 and every 4 weeks thereafter for 6 months, along with sirolimus. A short course of low-dose dexamethasone was given from day +6 for 14 days. Nine patients engrafted at a median of 15 days, with 1 patient with TM dying of sepsis on day +19. None of the patients developed acute or chronic GVHD. All 9 patients are alive and disease free at a median follow-up of 28 months. Only 4 patients had cytomegalovirus reactivation. The pattern of immune reconstitution showed a prompt and sustained recovery of T cell subsets with memory phenotype, along with early and sustained increase of Tregs and NKG2C+ natural killer (NK) cells. This novel approach, targeting CD80 and CD86 on monocytes/macrophages, promoted engraftment and limited early-onset PTHPS and graft failure. The lack of GVHD and serious infections with this approach reflects an early recovery of Tregs, memory T cells, and persistence of NKG2C+ NK cells.
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Affiliation(s)
- Sarita Rani Jaiswal
- Cellular Therapy and Immunology, Manashi Chakrabarti Foundation, Kolkata, India; Department of Blood and Marrow Transplantation, Dharamshila Narayana Superspeciality Hospital and Research Centre, New Delhi, India.
| | - Prakash Bhakuni
- Department of Blood and Marrow Transplantation, Dharamshila Narayana Superspeciality Hospital and Research Centre, New Delhi, India
| | - Hema Malini Aiyer
- Department of Anatomic Pathology, Dharamshila Narayana Superspeciality Hospital and Research Centre, New Delhi, India
| | - Mayank Soni
- Department of Blood and Marrow Transplantation, Dharamshila Narayana Superspeciality Hospital and Research Centre, New Delhi, India
| | - Satish Bansal
- Department of Radiology, Dharamshila Narayana Superspeciality Hospital and Research Centre, New Delhi, India
| | - Suparno Chakrabarti
- Cellular Therapy and Immunology, Manashi Chakrabarti Foundation, Kolkata, India; Department of Blood and Marrow Transplantation, Dharamshila Narayana Superspeciality Hospital and Research Centre, New Delhi, India
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Carstensen M, Christensen T, Stilund M, Møller HJ, Petersen EL, Petersen T. Activated monocytes and markers of inflammation in newly diagnosed multiple sclerosis. Immunol Cell Biol 2020; 98:549-562. [PMID: 32253768 PMCID: PMC7496724 DOI: 10.1111/imcb.12337] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 03/08/2020] [Accepted: 03/29/2020] [Indexed: 12/11/2022]
Abstract
In multiple sclerosis (MS), the inflammation and demyelination of the central nervous system (CNS) develop in distinct ways. This makes diagnosing patients difficult, imperative to initiating early and proper treatment. Several common features exist, among them a profound infiltration of monocytes into the CNS mediating demyelination and tissue destruction. In the periphery, monocytes are divided into three subsets depending on expression of CD14 and CD16, representing different stages of activation and differentiation. To investigate their involvement in MS, peripheral blood mononuclear cells (PBMCs) from 61 patients with incipient, untreated MS and 22 symptomatic control (SC) patients as well as 6 patients with radiologically isolated syndrome (RIS) were characterized ex vivo. In addition, paired serum and cerebrospinal fluid (CSF) samples were analyzed with a panel of biomarkers. In PBMC samples, we demonstrate decreased levels of nonclassical monocytes with a concomitant significant decrease of human endogenous retrovirus (HERV) H3 envelope epitopes on this monocyte subset compared with SC and RIS. The observed HERV expression is present on nonclassical monocytes irrespective of MS and thus presumably a result of the inflammatory activation. For the other surface markers analyzed, we found significantly decreased expression between classical and nonclassical monocytes. In matched samples of CSF a highly significant increase in levels of soluble markers of activation and inflammation is shown, and notably this is not the case for the serum samples. Of the soluble markers investigated, interleukin (IL)‐12/IL‐23p40 had the highest discriminatory power in differentiating patients with MS from SC and RIS, almost comparable to the immunoglobulin G index.
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Affiliation(s)
- Mikkel Carstensen
- Department of Biomedicine, Aarhus University, Skou Building, Høegh-Guldbergsgade 10, DK-8000, Aarhus C, Denmark
| | - Tove Christensen
- Department of Biomedicine, Aarhus University, Skou Building, Høegh-Guldbergsgade 10, DK-8000, Aarhus C, Denmark
| | - Morten Stilund
- Department of Biomedicine, Aarhus University, Skou Building, Høegh-Guldbergsgade 10, DK-8000, Aarhus C, Denmark.,Department of Neurology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, DK-8200, Aarhus N, Denmark
| | - Holger J Møller
- Department of Clinical Biochemistry, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, DK-8200, Aarhus N, Denmark
| | - Eva L Petersen
- Department of Biomedicine, Aarhus University, Skou Building, Høegh-Guldbergsgade 10, DK-8000, Aarhus C, Denmark
| | - Thor Petersen
- Department of Neurology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, DK-8200, Aarhus N, Denmark
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134
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Zhang L, Hofer TP, Zawada AM, Rotter B, Krezdorn N, Noessner E, Devaux Y, Heine G, Ziegler-Heitbrock L. Epigenetics in non-classical monocytes support their pro-inflammatory gene expression. Immunobiology 2020; 225:151958. [PMID: 32517883 DOI: 10.1016/j.imbio.2020.151958] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 05/05/2020] [Indexed: 01/12/2023]
Abstract
Non-classical human monocytes are characterized by high-level expression of cytokines like TNF, but the mechanisms involved are elusive. We have identified miRNAs and CpG-methylation sites that are unique to non-classical monocytes, defined via CD14 and CD16 expression levels. For down-regulated miRNAs that are linked to up-regulated mRNAs the dominant gene ontology term was intracellular signal transduction. This included down-regulated miRNA-20a-5p and miRNA-106b-5p, which both are linked to increased mRNA for the TRIM8 signaling molecule. Methylation analysis revealed 16 hypo-methylated CpG sites upstream of 14 differentially increased mRNAs including 2 sites upstream of TRIM8. Consistent with a positive role in signal transduction, high TRIM8 levels went along with high basal TNF mRNA levels in non-classical monocytes. Since cytokine expression levels in monocytes strongly increase after stimulation with toll-like-receptor ligands, we have analyzed non-classical monocytes (defined via slan expression) after stimulation with lipopolysaccharide (LPS). LPS-stimulated cells continued to have low miRNA-20a and miRNA-106b and high TRIM8 mRNA levels and they showed a 10-fold increase in TNF mRNA. These data suggest that decreased miRNAs and CpG hypo-methylation is linked to enhanced expression of TRIM8 and that this can contribute to the increased TNF levels in non-classical human monocytes.
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Affiliation(s)
- Lu Zhang
- Cardiovascular Research Unit, Luxembourg Institute of Health, Luxembourg
| | - Thomas P Hofer
- Immunoanalytics Research Group Tissue Control of Immunocytes, Helmholtz Center Munich, Munich, Germany
| | - Adam M Zawada
- Department of Internal Medicine IV, Saarland University Medical Center, Homburg, Germany
| | | | | | - Elfriede Noessner
- Immunoanalytics Research Group Tissue Control of Immunocytes, Helmholtz Center Munich, Munich, Germany
| | - Yvan Devaux
- Cardiovascular Research Unit, Luxembourg Institute of Health, Luxembourg
| | - Gunnar Heine
- Department of Internal Medicine IV, Saarland University Medical Center, Homburg, Germany
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135
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Stassen SV, Siu DMD, Lee KCM, Ho JWK, So HKH, Tsia KK. PARC: ultrafast and accurate clustering of phenotypic data of millions of single cells. Bioinformatics 2020; 36:2778-2786. [PMID: 31971583 PMCID: PMC7203756 DOI: 10.1093/bioinformatics/btaa042] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/24/2019] [Accepted: 01/16/2020] [Indexed: 12/13/2022] Open
Abstract
MOTIVATION New single-cell technologies continue to fuel the explosive growth in the scale of heterogeneous single-cell data. However, existing computational methods are inadequately scalable to large datasets and therefore cannot uncover the complex cellular heterogeneity. RESULTS We introduce a highly scalable graph-based clustering algorithm PARC-Phenotyping by Accelerated Refined Community-partitioning-for large-scale, high-dimensional single-cell data (>1 million cells). Using large single-cell flow and mass cytometry, RNA-seq and imaging-based biophysical data, we demonstrate that PARC consistently outperforms state-of-the-art clustering algorithms without subsampling of cells, including Phenograph, FlowSOM and Flock, in terms of both speed and ability to robustly detect rare cell populations. For example, PARC can cluster a single-cell dataset of 1.1 million cells within 13 min, compared with >2 h for the next fastest graph-clustering algorithm. Our work presents a scalable algorithm to cope with increasingly large-scale single-cell analysis. AVAILABILITY AND IMPLEMENTATION https://github.com/ShobiStassen/PARC. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
| | | | | | - Joshua W K Ho
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | | | - Kevin K Tsia
- Department of Electrical and Electronic Engineering
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136
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Almubarak A, Tanagala KKK, Papapanou PN, Lalla E, Momen-Heravi F. Disruption of Monocyte and Macrophage Homeostasis in Periodontitis. Front Immunol 2020; 11:330. [PMID: 32210958 PMCID: PMC7067288 DOI: 10.3389/fimmu.2020.00330] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 02/10/2020] [Indexed: 12/19/2022] Open
Abstract
Monocytes and macrophages are major cellular components of the innate immunity that play essential roles in tissue homeostasis. The contribution of different subsets of monocytes/macrophages to periodontal health and disease has not been fully elucidated. Type 2 diabetes mellitus (T2DM) is a risk factor for periodontitis. We hypothesized that the monocyte/macrophage signaling is perturbed in periodontitis-affected sites versus periodontally healthy sites and that this perturbation plays a critical role in the pathogenesis of periodontitis. Pairs of gingival tissue samples (each from a periodontally healthy and a periodontitis-affected site of the same patient) were harvested from 27 periodontitis patients, with and without T2DM. Each sample was processed to form a single-cell suspension, and a flow-cytometry panel was designed and validated to study monocyte and macrophage phenotypes. In separate experiments, the transcriptional changes associated with a pro-inflammatory phenotype were also examined in monocyte/macrophage subsets obtained from peripheral blood of patients with T2DM versus diabetes-free controls. A significantly higher proportion of intermediate (CD14+CD16+) monocytes was observed in periodontitis-affected tissues compared to healthy tissues. These monocytes overexpressed HLA-DR and PDL1 molecules, suggesting their activated inflammatory status. PDL1 increase was specific to intermediate monocytes. The ratio of M1/M2 macrophages was also significantly higher in periodontally affected sites, signifying an imbalance between inflammatory and repair mechanisms. We found a significantly higher expression of PDL1 in overall monocytes and M1 macrophages in periodontitis-affected sites compared to controls. Importantly, we identified a subpopulation of M1 macrophages present in periodontally affected tissues which expressed high levels of CD47, a glycoprotein of the immunoglobulin family that plays a critical role in self-recognition and impairment of phagocytosis. Analysis of the transcriptional landscape of monocytes/macrophages in gingival tissue of T2DM patients with periodontitis revealed a significant disruption in homeostasis toward a proinflammatory phenotype, elevation of pro-inflammatory transcription factors STAT1 and IRF1, and repression of anti-inflammatory JMJD3 in circulating monocytes. Taken together, our results demonstrate disruption of myeloid-derived cell homeostasis in periodontitis, with or without T2DM, and highlight a potentially significant role of these cell types in its pathogenesis. The impact of macrophage and monocyte signaling pathways on the pathobiology of periodontitis should be further evaluated.
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Affiliation(s)
- Abdulrahman Almubarak
- Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University College of Dental Medicine, New York, NY, United States
| | - Kranthi Kiran Kishore Tanagala
- Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University College of Dental Medicine, New York, NY, United States
| | - Panos N Papapanou
- Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University College of Dental Medicine, New York, NY, United States
| | - Evanthia Lalla
- Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University College of Dental Medicine, New York, NY, United States
| | - Fatemeh Momen-Heravi
- Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University College of Dental Medicine, New York, NY, United States.,Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY, United States
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137
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Abstract
PURPOSE OF REVIEW A variety of high-efficacy disease-modifying therapies (DMTs) are available for the treatment of multiple sclerosis (MS). After evaluation and approval by regulatory agencies, DMTs are likely to be administered to patients whose characteristics differ from those enrolled in clinical trials. This may contribute to the emergence of unexpected adverse events observed in the real-world setting. Higher age may be a relevant factor that could change the benefit-risk balance of DMTs, as it may associate with lower efficiency and higher frequency of adverse events. RECENT FINDINGS The absolute and relative number of patients with MS who reach the age of 55 and higher increases. Growing evidence demonstrates lower efficacy of DMTs in older persons with MS. Specific risks during DMTs for MS, such as the risk of developing progressive multifocal leukoencephalopathy (PML) or the outcome following PML, have been associated with age. It is hypothesized that age-related and therapy-induced alterations to the immune system may have (super)additive effects, resulting in an acceleration of physiological immunosenescence and inflamm-aging. SUMMARY In this article, we review the risks of high-efficacy DMTs in MS with a specific focus on age-related efficacy and risks, including opportunistic infections, malignancies, and autoimmune reactions.
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138
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Kania G, Rudnik M, Distler O. Involvement of the myeloid cell compartment in fibrogenesis and systemic sclerosis. Nat Rev Rheumatol 2020; 15:288-302. [PMID: 30953037 DOI: 10.1038/s41584-019-0212-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Systemic sclerosis (SSc) is an autoimmune fibrotic disease of unknown aetiology that is characterized by vascular changes in the skin and visceral organs. Autologous haematopoietic stem cell transplantation can improve skin and organ fibrosis in patients with progressive disease and a high risk of organ failure, indicating that cells originating in the bone marrow are important contributors to the pathogenesis of SSc. Animal studies also indicate a pivotal function of myeloid cells in the development of fibrosis leading to changes in the tissue architecture and dysfunction in multiple organs such as the heart, lungs, liver and kidney. In this Review, we summarize current knowledge about the function of myeloid cells in fibrogenesis that occurs in patients with SSc. Targeted therapies currently in clinical studies for SSc might affect myeloid cell-related pathways. Therefore, myeloid cells might be used as cellular biomarkers of disease through the application of high-dimensional techniques such as mass cytometry and single-cell RNA sequencing.
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Affiliation(s)
- Gabriela Kania
- Department of Rheumatology, Center of Experimental Rheumatology, University Hospital Zurich, Zurich, Switzerland
| | - Michal Rudnik
- Department of Rheumatology, Center of Experimental Rheumatology, University Hospital Zurich, Zurich, Switzerland
| | - Oliver Distler
- Department of Rheumatology, Center of Experimental Rheumatology, University Hospital Zurich, Zurich, Switzerland.
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139
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Blanks AM, Wagamon TT, Lafratta L, Sisk MG, Senter MB, Pedersen LN, Bohmke N, Shah A, Mihalick VL, Franco RL. Impact of physical activity on monocyte subset CCR2 expression and macrophage polarization following moderate intensity exercise. Brain Behav Immun Health 2020; 2:100033. [PMID: 38377416 PMCID: PMC8474621 DOI: 10.1016/j.bbih.2019.100033] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/20/2019] [Accepted: 12/21/2019] [Indexed: 12/01/2022] Open
Abstract
Coronary artery disease (CAD) is an immune-mediated disease in which CCR2 attracts classical, intermediate, and non-classical monocytes to the arterial intima where they differentiate to macrophages. Balance between pro-inflammatory M1 and anti-inflammatory M2 macrophages contributes to CAD prevention. Moderate to vigorous intensity physical activity (MVPA) elicits an immune response and reduces the incidence of CAD, however, the impact of prior MVPA on monocyte subset CCR2 expression and macrophage polarization following acute exercise is unknown. Purpose To determine the impact of physical activity status on monocyte subset CCR2 surface expression and macrophage polarization in response to an acute bout of moderate intensity cycle ergometry. Methods 24 healthy women and men (12 high physically active [HIACT]: ≥1500 METmin/wk MVPA & 12 low physically active [LOACT]: <600 METmin/wk MVPA) underwent an acute moderate intensity (60% VO2peak) bout of cycle ergometry for 30 min. Blood samples were collected prior to (PRE), immediately (POST), 1 h (1H), and 2 h (2H) following exercise. Monocyte CCR2 and macrophage CD86 (M1) and CD206 (M2) were analyzed by flow cytometry. Results Intermediate monocyte CCR2 decreased in response to exercise in the HIACT group (PRE: 11409.0 ± 1084.0 vs. POST: 9524.3 ± 1062.4; p = 0.034). Macrophage CD206 was lower in the LOACT compared to the HIACT group at 1H (HIACT: 67.2 ± 5.6 vs. LOACT: 50.1 ± 5.2%; p = 0.040). Macrophage CD206 at 1H was associated with both PRE (r = 0.446, p = 0.043) and POST (r = 0.464, p = 0.034) non-classical monocyte CCR2. Conclusion These data suggest that regular moderate to vigorous physical activity positively impacts both monocytes and macrophages following acute moderate intensity exercise and that this impact may contribute to the prevention of coronary artery disease.
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Affiliation(s)
- Anson M. Blanks
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Thomas T. Wagamon
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Lindsay Lafratta
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Mabel G. Sisk
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Morgan B. Senter
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Lauren N. Pedersen
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Natalie Bohmke
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Attiya Shah
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - Virginia L. Mihalick
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
| | - R. Lee Franco
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA, United States
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140
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Huggard D, Doherty DG, Molloy EJ. Immune Dysregulation in Children With Down Syndrome. Front Pediatr 2020; 8:73. [PMID: 32175298 PMCID: PMC7056667 DOI: 10.3389/fped.2020.00073] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 02/14/2020] [Indexed: 12/12/2022] Open
Abstract
Down syndrome (DS) is the most common genetic syndrome associated with immune defects. The extent of immune dysregulation in DS is substantial, spanning the innate and adaptive systems and including anomalies in: T and B cells, monocytes, neutrophil chemotaxis, circulating cytokines, and suboptimal antibody responses which all contribute to an increased risk of infections, poorer clinical outcomes and chronic inflammation in this vulnerable cohort. Other aspects of innate immunity may also be abnormal and contribute to the increased morbidity and warrant further interrogation such as: gamma delta T cell function, the inflammasome, Toll-like receptors and their pathways. Pharmacotherapies such as pavilizumab, pneumococcal and influenza immunizations, as well as potential immunoprophylactic agents such as pidotimod, azithromycin and Broncho-Vaxom may help alleviate the infectious consequences. Children with DS need to be managed with a heightened sense of awareness and urgency in the setting of sepsis and signs of chronic inflammation need regular screening and appropriate follow up.
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Affiliation(s)
- Dean Huggard
- Paediatrics, Trinity College, The University of Dublin, Dublin, Ireland.,Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin, Ireland.,Paediatrics, Children's Hospital Ireland at Crumlin and Tallaght, Dublin, Ireland.,National Children's Research Centre Dublin, Dublin, Ireland
| | - Derek G Doherty
- Paediatrics, Trinity College, The University of Dublin, Dublin, Ireland.,Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin, Ireland
| | - Eleanor J Molloy
- Paediatrics, Trinity College, The University of Dublin, Dublin, Ireland.,Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin, Ireland.,Paediatrics, Children's Hospital Ireland at Crumlin and Tallaght, Dublin, Ireland.,National Children's Research Centre Dublin, Dublin, Ireland.,Coombe Women and Infants University Hospital, Dublin, Ireland
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141
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Cheon SY, Kim H, Rubinsztein DC, Lee JE. Autophagy, Cellular Aging and Age-related Human Diseases. Exp Neurobiol 2019; 28:643-657. [PMID: 31902153 PMCID: PMC6946111 DOI: 10.5607/en.2019.28.6.643] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/04/2019] [Accepted: 11/04/2019] [Indexed: 12/22/2022] Open
Abstract
Macroautophagy/autophagy is a conserved degradation system that engulfs intracytoplasmic contents, including aggregated proteins and organelles, which is crucial for cellular homeostasis. During aging, cellular factors suggested as the cause of aging have been reported to be associated with progressively compromised autophagy. Dysfunctional autophagy may contribute to age-related diseases, such as neurodegenerative disease, cancer, and metabolic syndrome, in the elderly. Therefore, restoration of impaired autophagy to normal may help to prevent age-related disease and extend lifespan and longevity. Therefore, this review aims to provide an overview of the mechanisms of autophagy underlying cellular aging and the consequent disease. Understanding the mechanisms of autophagy may provide potential information to aid therapeutic interventions in age-related diseases.
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Affiliation(s)
- So Yeong Cheon
- Department of Medical Genetics, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge CB2 0XY, United Kingdom.,Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Hyunjeong Kim
- Department of Medical Genetics, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge CB2 0XY, United Kingdom.,Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Korea
| | - David C Rubinsztein
- Department of Medical Genetics, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge CB2 0XY, United Kingdom.,UK Dementia Research Institute, University of Cambridge, Cambridge CB2 0AH, United Kingdom
| | - Jong Eun Lee
- Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Korea.,BK21 PLUS Project for Medical Science, and Brain Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea
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142
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Immune Characterization in Aneurysmal Subarachnoid Hemorrhage Reveals Distinct Monocytic Activation and Chemokine Patterns. Transl Stroke Res 2019; 11:1348-1361. [PMID: 31858408 DOI: 10.1007/s12975-019-00764-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 11/08/2019] [Accepted: 12/04/2019] [Indexed: 10/25/2022]
Abstract
The pathophysiology of delayed cerebral ischemia (DCI) after aneurysmal subarachnoid hemorrhage (aSAH) is incompletely understood. Intrathecal activation of inflammatory immune cells is suspected to play a major role for the induction of DCI. The aim of this study is to identify immune cell subsets and mediators involved in the pathogenesis of DCI. We prospectively collected blood and CSF from 25 patients with aSAH at early and late time points. We performed multicolor flow cytometry of peripheral blood and CSF, analyzing immune cell activation and pro-inflammatory cyto- and chemokines. In addition to the primary immune analysis, we retrospectively analyzed immune cell dynamics in the CSF of all our SAH patients. Our results show an increased monocyte infiltration secondary to aneurysm rupture in patients with DCI. Infiltrating monocytes are defined by a non-classical (CD14dim CD16+) phenotype at early stages. The infiltration is most likely triggered by the intrathecal immune activation. Here, high levels of pro-inflammatory chemokines, such as CXCL1, CXCL9, CXCL10, and CXCL11, are detected. The intrathecal cellular activation profile of monocytes was defined by upregulation of CD163 and CD86 on monocytes and a presumable later differentiation into antigen-presenting plasmacytoid dendritic cells (pDCs) and hemosiderophages. Peripheral immune activation was reflected by CD69 upregulation on T cells. Analysis of DCI prevalence, Hunt and Hess grade, and clinical outcome correlated with the degree of immune activation. We demonstrate that monocytes and T cells are activated intrathecally after aSAH and mediate a local inflammatory response which is presumably driven by chemokines. Our data shows that the distinct pattern of immune activation correlates with the prevalence of DCI, indicating a pathophysiological connection to the incidence of vasospasm.
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143
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da Silva IM, Santos MA, Galvão SL, Dorneles GP, Lira FS, Romão PRT, Peres A. Blood flow restriction impairs the inflammatory adaptations of strength training in overweight men: a clinical randomized trial. Appl Physiol Nutr Metab 2019; 45:659-666. [PMID: 31782931 DOI: 10.1139/apnm-2019-0700] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The aim of this study was to evaluate the impact of high-intensity strength training (ST) or low-intensity strength training with blood flow restriction (ST-BFR) on monocyte subsets, the expression of C-C chemokine receptor 5 (CCR5), and CD16 on monocytes, and tumor necrosis factor alpha (TNF-α) production of overweight men. Thirty overweight men were randomly assigned to conventional ST or ST-BFR. Both groups performed exercises of knee extension and biceps curl with equal volume (3 sessions/week) over 8 weeks, and the peripheral frequency of monocytes (CD14+CD16-, classical monocytes; CD14+CD16+, intermediate monocytes; CD14-CD16+, nonclassical monocytes), the mean fluorescence intensity (MFI) of CCR5 and CD16 on CD14+ monocytes; and the production of TNF-α by lipopolysaccharide (LPS)-stimulated cells were quantified. Eight weeks of ST increased the frequency of CD14+CD16- monocytes (p = 0.04) and reduced the percentage of CD14-CD16+ (p = 0.02) and the production of TNF-α by LPS-stimulated cells (p = 0.03). The MFI of CD16 on CD14+ monocytes decreased after the ST intervention (p = 0.02). No difference in monocyte subsets, CCR5 or CD16 expression, and TNF-α production were identified after ST-BFR intervention (p > 0.05). The adoption of ST promotes anti-inflammatory effects on monocyte subsets of overweight men, but this effect was lost when BFR was adopted. Novelty High-intensity strength training reduces the production of TNF-α and the peripheral frequency of CD16+ monocytes in overweight men. Blood flow restriction method blunts the strength training adaptations on monocyte subsets and pro-inflammatory TNF-α production in overweight men.
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Affiliation(s)
- Igor Martins da Silva
- Laboratory of Cellular and Molecular Immunology, Department of Health Basic Sciences, Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS 90050-170, Brazil
| | - Maeli Andressa Santos
- Laboratory of Cellular and Molecular Immunology, Department of Health Basic Sciences, Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS 90050-170, Brazil
| | - Simone Lunelli Galvão
- Research Center. Methodist University Center IPA. Porto Alegre, RS 90420-060, Brazil
| | - Gilson P Dorneles
- Laboratory of Cellular and Molecular Immunology, Department of Health Basic Sciences, Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS 90050-170, Brazil
| | - Fabio Santos Lira
- Exercise and Immunometabolism Research Group, Post-Graduation Program in Motricity Sciences, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP 19060-90, Brazil
| | - Pedro R T Romão
- Laboratory of Cellular and Molecular Immunology, Department of Health Basic Sciences, Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS 90050-170, Brazil
| | - Alessandra Peres
- Laboratory of Cellular and Molecular Immunology, Department of Health Basic Sciences, Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS 90050-170, Brazil
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144
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Riksen NP, Netea MG. Be aware, innate immune cells remember. Aging (Albany NY) 2019; 10:2218-2219. [PMID: 30215600 PMCID: PMC6188483 DOI: 10.18632/aging.101552] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 09/11/2018] [Indexed: 11/25/2022]
Affiliation(s)
- Niels P Riksen
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Mihai G Netea
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, the Netherlands.,Department for Genomics and Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
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145
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Patel AA, Yona S. Inherited and Environmental Factors Influence Human Monocyte Heterogeneity. Front Immunol 2019; 10:2581. [PMID: 31787976 PMCID: PMC6854020 DOI: 10.3389/fimmu.2019.02581] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/17/2019] [Indexed: 12/12/2022] Open
Abstract
Blood monocytes develop in the bone marrow before being released into the peripheral circulation. The circulating monocyte pool is composed of multiple subsets, each with specialized functions. These cells are recruited to repopulate resident monocyte-derived cells in the periphery and also to sites of injury. Several extrinsic factors influence the function and quantity of monocytes in the blood. Here, we outline the impact of sex, ethnicity, age, sleep, diet, and exercise on monocyte subsets and their function, highlighting that steady state is not a single physiological condition. A clearer understanding of the relationship between these factors and the immune system may allow for improved therapeutic strategies.
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Affiliation(s)
- Amit A. Patel
- Division of Medicine, University College London, University of London, London, United Kingdom
| | - Simon Yona
- The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
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146
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Costantini A, Viola N, Berretta A, Galeazzi R, Matacchione G, Sabbatinelli J, Storci G, De Matteis S, Butini L, Rippo MR, Procopio AD, Caraceni D, Antonicelli R, Olivieri F, Bonafè M. Age-related M1/M2 phenotype changes in circulating monocytes from healthy/unhealthy individuals. Aging (Albany NY) 2019; 10:1268-1280. [PMID: 29885276 PMCID: PMC6046240 DOI: 10.18632/aging.101465] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 05/30/2018] [Indexed: 01/10/2023]
Abstract
Macrophage polarization is a candidate biomarker of disease-related inflammatory status, but its modulation during aging has not been investigated. To do this, the M1/M2 profile was assessed by CD80/CD163 gating in classical (CD14++CD16-), intermediate (CD14++CD16+), and non-classical (CD14lowCD16+) monocytes from 31 healthy subjects (CTRs) of different ages. Cytofluorimetric analysis showed a significantly different CD80/CD163 distribution in the three subsets, as more than 80% of classical and intermediate monocytes were CD80+CD163+, whereas most non-classical monocytes were CD80-CD163- and CD163+. Non-classical CD163+ monocytes were significantly higher whereas classical CD163+ and CD80-CD163- monocytes significantly lower in older than younger CTRs (cut-off, 65 years), suggesting different age-related trends for M2 subsets. To establish whether an M1/M2 imbalance could be associated with disease, 21 patients with acute myocardial infarction (AMI) were compared with older CTRs. The AMI patients showed a significantly decreased proportion of CD163+CD80+ and an increased proportion of CD163+ and CD163-CD80- cells among classical monocytes, opposite trends to those observed in healthy aging. Moreover, a significantly greater proportion of intermediate and non-classical CD80+ monocytes suggested a shift to a pro-inflammatory phenotype. Overall, CD163/CD80 cytofluorimetric characterization of circulating monocytes provides additional information about their polarization and could be an innovative tool to monitor aging.
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Affiliation(s)
- Andrea Costantini
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy.,Azienda Ospedaliero Universitaria Ospedali Riuniti, Ancona, Italy
| | - Nadia Viola
- Azienda Ospedaliero Universitaria Ospedali Riuniti, Ancona, Italy
| | | | - Roberta Galeazzi
- Clinical and Molecular Laboratory, I.N.R.C.A. (Italian National Research Centre on Aging)-IRCCS, Ancona, Italy
| | - Giulia Matacchione
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
| | - Jacopo Sabbatinelli
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
| | - Gianluca Storci
- Department of Experimental, Diagnostic and Specialty Medicine, DIMES, Alma Mater Studiorum, Bologna, Italy
| | - Serena De Matteis
- Biosciences Laboratory, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Luca Butini
- Azienda Ospedaliero Universitaria Ospedali Riuniti, Ancona, Italy
| | - Maria Rita Rippo
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
| | - Antonio Domenico Procopio
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy.,Center of Clinical Pathology and Innovative Therapy, I.N.R.C.A. (Italian National Research Centre on Aging)-IRCCS, Ancona, Italy
| | - Daniele Caraceni
- Department of Cardiology, I.N.R.C.A. (Italian National Research Centre on Aging)-IRCCS, Ancona, Italy
| | - Roberto Antonicelli
- Department of Cardiology, I.N.R.C.A. (Italian National Research Centre on Aging)-IRCCS, Ancona, Italy
| | - Fabiola Olivieri
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy.,Center of Clinical Pathology and Innovative Therapy, I.N.R.C.A. (Italian National Research Centre on Aging)-IRCCS, Ancona, Italy
| | - Massimiliano Bonafè
- Department of Experimental, Diagnostic and Specialty Medicine, DIMES, Alma Mater Studiorum, Bologna, Italy.,Biosciences Laboratory, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
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147
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Yarbro JR, Pence BD. Classical monocytes from older adults maintain capacity for metabolic compensation during glucose deprivation and lipopolysaccharide stimulation. Mech Ageing Dev 2019; 183:111146. [PMID: 31493436 PMCID: PMC7027594 DOI: 10.1016/j.mad.2019.111146] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 08/15/2019] [Accepted: 09/02/2019] [Indexed: 12/24/2022]
Abstract
Inflammaging is the chronic low-grade inflammation that occurs with age that contributes to the pathology of age-related diseases. Monocytes are innate immune cells that become dysregulated with age and which can contribute to inflammaging. Metabolism plays a key role in determining immune cell functions, with anti-inflammatory cells primarily relying on fatty acid oxidation and pro-inflammatory cells primarily relying on glycolysis. It was recently shown that lipopolysaccharide (LPS)-stimulated monocytes can compensate for a lack of glucose by utilizing fatty acid oxidation. Given that mitochondrial function decreases with age, we hypothesized that classical monocytes taken from aged individuals would have an impaired ability to upregulate oxidative metabolism along with impaired effector functions. Aging did not impair LPS-induced oxygen consumption rate during glucose deprivation as measured on a Seahorse XFp system. Additionally, aged classical monocytes maintained inflammatory gene expression responses and phagocytic capacity during LPS stimulation in the absence of glucose. In conclusion, aged classical monocytes maintain effector and metabolic functions during glucose deprivation, at least in an ex vivo context.
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Affiliation(s)
| | - Brandt D Pence
- School of Health Studies, University of Memphis, 38152, USA; Center for Nutraceutical and Dietary Supplement Research, University of Memphis, Memphis, TN 38152, USA.
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148
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Ong SM, Teng K, Newell E, Chen H, Chen J, Loy T, Yeo TW, Fink K, Wong SC. A Novel, Five-Marker Alternative to CD16-CD14 Gating to Identify the Three Human Monocyte Subsets. Front Immunol 2019; 10:1761. [PMID: 31402918 PMCID: PMC6676221 DOI: 10.3389/fimmu.2019.01761] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 07/11/2019] [Indexed: 11/18/2022] Open
Abstract
Human primary monocytes are heterogeneous in terms of phenotype and function, but are sub-divided only based on CD16 and CD14 expression. CD16 expression distinguishes a subset of monocytes with highly pro-inflammatory properties from non-CD16 expressing “classical” monocytes. CD14 expression further subdivides the CD16+ monocytes into non-classical CD14low and intermediate CD14high subsets. This long-standing CD16–CD14 classification system, however, has limitations as CD14 is expressed in a continuum, leading to subjectivity in delineating the non-classical and intermediate subsets; in addition, CD16 expression is unstable, making identification of the subsets impossible after in vitro culture or during inflammatory conditions in vivo. Hence, we aimed to identify the three monocyte subsets using an alternative combination of markers. Additionally, we wanted to address whether the monocyte subset perturbations observed during infection is real or an artifact of differential CD16 and/or CD14 regulation. Using cytometry by time-of-flight (CyTOF), we studied the simultaneous expression of 34 monocyte markers on total monocytes, and derived a combination of five markers (CD33, CD86, CD64, HLA-DR, and CCR2), that could objectively delineate the three subsets. Using these markers, we could also distinguish CD16+ monocytes from CD16− monocytes after in vitro stimulation. Finally, we found that the observed expansion of intermediate (CD14high) monocytes in dengue virus-infected patients was due to up-regulated CD16 expression on classical monocytes. With our new combination of markers, we can now identify monocyte subsets without CD16 and CD14, and accurately re-examine monocyte subset perturbations in diseases.
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Affiliation(s)
- Siew-Min Ong
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore
| | - Karen Teng
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore
| | - Evan Newell
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore
| | - Hao Chen
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore
| | - Jinmiao Chen
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore
| | - Thomas Loy
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore.,School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Tsin-Wen Yeo
- National Centre for Infectious Diseases, Singapore, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Katja Fink
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore.,School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Siew-Cheng Wong
- Singapore Immunology Network (SIgN), ASTAR Research Entities, Singapore, Singapore.,School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
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149
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Salminen A, Kaarniranta K, Kauppinen A. Immunosenescence: the potential role of myeloid-derived suppressor cells (MDSC) in age-related immune deficiency. Cell Mol Life Sci 2019; 76:1901-1918. [PMID: 30788516 PMCID: PMC6478639 DOI: 10.1007/s00018-019-03048-x] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 01/25/2019] [Accepted: 02/14/2019] [Indexed: 12/17/2022]
Abstract
The aging process is associated with chronic low-grade inflammation in both humans and rodents, commonly called inflammaging. At the same time, there is a gradual decline in the functional capacity of adaptive and innate immune systems, i.e., immunosenescence, a process not only linked to the aging process, but also encountered in several pathological conditions involving chronic inflammation. The hallmarks of immunosenescence include a decline in the numbers of naïve CD4+ and CD8+ T cells, an imbalance in the T cell subsets, and a decrease in T cell receptor (TCR) repertoire and signaling. Correspondingly, there is a decline in B cell lymphopoiesis and a reduction in antibody production. The age-related changes are not as profound in innate immunity as they are in adaptive immunity. However, there are distinct functional deficiencies in dendritic cells, natural killer cells, and monocytes/macrophages with aging. Interestingly, the immunosuppression induced by myeloid-derived suppressor cells (MDSC) in diverse inflammatory conditions also targets mainly the T and B cell compartments, i.e., inducing very similar alterations to those present in immunosenescence. Here, we will compare the immune profiles induced by immunosenescence and the MDSC-driven immunosuppression. Given that the appearance of MDSCs significantly increases with aging and MDSCs are the enhancers of other immunosuppressive cells, e.g., regulatory T cells (Tregs) and B cells (Bregs), it seems likely that MDSCs might remodel the immune system, thus preventing excessive inflammation with aging. We propose that MDSCs are potent inducers of immunosenescence.
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Affiliation(s)
- Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, 70211, Kuopio, Finland.
| | - Kai Kaarniranta
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, 70211, Kuopio, Finland
- Department of Ophthalmology, Kuopio University Hospital, KYS, P.O. Box 100, 70029, Kuopio, Finland
| | - Anu Kauppinen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, P.O. Box 1627, 70211, Kuopio, Finland
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150
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Mussbacher M, Salzmann M, Brostjan C, Hoesel B, Schoergenhofer C, Datler H, Hohensinner P, Basílio J, Petzelbauer P, Assinger A, Schmid JA. Cell Type-Specific Roles of NF-κB Linking Inflammation and Thrombosis. Front Immunol 2019; 10:85. [PMID: 30778349 PMCID: PMC6369217 DOI: 10.3389/fimmu.2019.00085] [Citation(s) in RCA: 375] [Impact Index Per Article: 75.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 01/11/2019] [Indexed: 12/22/2022] Open
Abstract
The transcription factor NF-κB is a central mediator of inflammation with multiple links to thrombotic processes. In this review, we focus on the role of NF-κB signaling in cell types within the vasculature and the circulation that are involved in thrombo-inflammatory processes. All these cells express NF-κB, which mediates important functions in cellular interactions, cell survival and differentiation, as well as expression of cytokines, chemokines, and coagulation factors. Even platelets, as anucleated cells, contain NF-κB family members and their corresponding signaling molecules, which are involved in platelet activation, as well as secondary feedback circuits. The response of endothelial cells to inflammation and NF-κB activation is characterized by the induction of adhesion molecules promoting binding and transmigration of leukocytes, while simultaneously increasing their thrombogenic potential. Paracrine signaling from endothelial cells activates NF-κB in vascular smooth muscle cells and causes a phenotypic switch to a “synthetic” state associated with a decrease in contractile proteins. Monocytes react to inflammatory situations with enforced expression of tissue factor and after differentiation to macrophages with altered polarization. Neutrophils respond with an extension of their life span—and upon full activation they can expel their DNA thereby forming so-called neutrophil extracellular traps (NETs), which exert antibacterial functions, but also induce a strong coagulatory response. This may cause formation of microthrombi that are important for the immobilization of pathogens, a process designated as immunothrombosis. However, deregulation of the complex cellular links between inflammation and thrombosis by unrestrained NET formation or the loss of the endothelial layer due to mechanical rupture or erosion can result in rapid activation and aggregation of platelets and the manifestation of thrombo-inflammatory diseases. Sepsis is an important example of such a disorder caused by a dysregulated host response to infection finally leading to severe coagulopathies. NF-κB is critically involved in these pathophysiological processes as it induces both inflammatory and thrombotic responses.
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Affiliation(s)
- Marion Mussbacher
- Institute of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria
| | - Manuel Salzmann
- Institute of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria
| | - Christine Brostjan
- Department of Surgery, General Hospital, Medical University of Vienna, Vienna, Austria
| | - Bastian Hoesel
- Institute of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria
| | | | - Hannes Datler
- Institute of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria
| | - Philipp Hohensinner
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - José Basílio
- Institute of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria
| | - Peter Petzelbauer
- Skin and Endothelial Research Division, Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Alice Assinger
- Institute of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria
| | - Johannes A Schmid
- Institute of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria
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