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Kohli J, Veenstra I, Demaria M. The struggle of a good friend getting old: cellular senescence in viral responses and therapy. EMBO Rep 2021; 22:e52243. [PMID: 33734564 PMCID: PMC8024996 DOI: 10.15252/embr.202052243] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/11/2021] [Accepted: 03/01/2021] [Indexed: 12/15/2022] Open
Abstract
Cellular senescence is a state of stable cell cycle arrest associated with macromolecular alterations and secretion of pro-inflammatory cytokines and molecules. Senescence-associated phenotypes restrict damage propagation and activate immune responses, two essential processes involved in response to viral infections. However, excessive accumulation and persistence of senescent cells can become detrimental and promote pathology and dysfunctions. Various pharmacological interventions, including antiviral therapies, lead to aberrant and premature senescence. Here, we review the molecular mechanisms by which viral infections and antiviral therapy induce senescence. We highlight the importance of these processes in attenuating viral dissemination and damage propagation, but also how prematurely induced senescent cells can promote detrimental adverse effects in humans. We describe which sequelae due to viral infections and treatment can be partly due to excessive and aberrant senescence. Finally, we propose that pharmacological strategies which eliminate senescent cells or suppress their secretory phenotype could mitigate side effects and alleviate the onset of additional morbidities. These strategies can become extremely beneficial in patients recovering from viral infections or undergoing antiviral therapy.
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Affiliation(s)
- Jaskaren Kohli
- European Research Institute for the Biology of Ageing (ERIBA)University Medical Center Groningen (UMCG)GroningenThe Netherlands
| | - Iris Veenstra
- European Research Institute for the Biology of Ageing (ERIBA)University Medical Center Groningen (UMCG)GroningenThe Netherlands
| | - Marco Demaria
- European Research Institute for the Biology of Ageing (ERIBA)University Medical Center Groningen (UMCG)GroningenThe Netherlands
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Hasenkrug KJ, Feldmann F, Myers L, Santiago ML, Guo K, Barrett BS, Mickens KL, Carmody A, Okumura A, Rao D, Collins MM, Messer RJ, Lovaglio J, Shaia C, Rosenke R, van Doremalen N, Clancy C, Saturday G, Hanley P, Smith B, Meade-White K, Shupert WL, Hawman DW, Feldmann H. Recovery from acute SARS-CoV-2 infection and development of anamnestic immune responses in T cell-depleted rhesus macaques. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2021:2021.04.02.438262. [PMID: 33821272 PMCID: PMC8020972 DOI: 10.1101/2021.04.02.438262] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
Abstract
Severe COVID-19 has been associated with T cell lymphopenia 1,2, but no causal effect of T cell deficiency on disease severity has been established. To investigate the specific role of T cells in recovery from SARS-CoV-2 infections we studied rhesus macaques that were depleted of either CD4+, CD8+ or both T cell subsets prior to infection. Peak virus loads were similar in all groups, but the resolution of virus in the T cell-depleted animals was slightly delayed compared to controls. The T cell-depleted groups developed virus-neutralizing antibody responses and also class-switched to IgG. When re-infected six weeks later, the T cell-depleted animals showed anamnestic immune responses characterized by rapid induction of high-titer virus-neutralizing antibodies, faster control of virus loads and reduced clinical signs. These results indicate that while T cells play a role in the recovery of rhesus macaques from acute SARS-CoV-2 infections, their depletion does not induce severe disease, and T cells do not account for the natural resistance of rhesus macaques to severe COVID-19. Neither primed CD4+ or CD8+ T cells appeared critical for immunoglobulin class switching, the development of immunological memory or protection from a second infection.
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Affiliation(s)
- Kim J. Hasenkrug
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Friederike Feldmann
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Lara Myers
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Mario L. Santiago
- Departments of Medicine, Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Kejun Guo
- Departments of Medicine, Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Bradley S. Barrett
- Departments of Medicine, Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Kaylee L. Mickens
- Departments of Medicine, Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Aaron Carmody
- Research Technologies Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Atsushi Okumura
- Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Deepashri Rao
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Madison M. Collins
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Ronald J. Messer
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Jamie Lovaglio
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Carl Shaia
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Rebecca Rosenke
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Neeltje van Doremalen
- Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Chad Clancy
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Greg Saturday
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Patrick Hanley
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Brian Smith
- Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Kimberly Meade-White
- Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - W. Lesley Shupert
- Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - David W. Hawman
- Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Heinz Feldmann
- Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
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353
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Varadé J, Magadán S, González-Fernández Á. Human immunology and immunotherapy: main achievements and challenges. Cell Mol Immunol 2021; 18:805-828. [PMID: 32879472 PMCID: PMC7463107 DOI: 10.1038/s41423-020-00530-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/27/2020] [Accepted: 07/31/2020] [Indexed: 02/07/2023] Open
Abstract
The immune system is a fascinating world of cells, soluble factors, interacting cells, and tissues, all of which are interconnected. The highly complex nature of the immune system makes it difficult to view it as a whole, but researchers are now trying to put all the pieces of the puzzle together to obtain a more complete picture. The development of new specialized equipment and immunological techniques, genetic approaches, animal models, and a long list of monoclonal antibodies, among many other factors, are improving our knowledge of this sophisticated system. The different types of cell subsets, soluble factors, membrane molecules, and cell functionalities are some aspects that we are starting to understand, together with their roles in health, aging, and illness. This knowledge is filling many of the gaps, and in some cases, it has led to changes in our previous assumptions; e.g., adaptive immune cells were previously thought to be unique memory cells until trained innate immunity was observed, and several innate immune cells with features similar to those of cytokine-secreting T cells have been discovered. Moreover, we have improved our knowledge not only regarding immune-mediated illnesses and how the immune system works and interacts with other systems and components (such as the microbiome) but also in terms of ways to manipulate this system through immunotherapy. The development of different types of immunotherapies, including vaccines (prophylactic and therapeutic), and the use of pathogens, monoclonal antibodies, recombinant proteins, cytokines, and cellular immunotherapies, are changing the way in which we approach many diseases, especially cancer.
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Affiliation(s)
- Jezabel Varadé
- CINBIO, Centro de Investigaciones Biomédicas, Universidade de Vigo, Immunology Group, Campus Universitario Lagoas, Marcosende, 36310, Vigo, Spain
- Instituto de Investigación Sanitaria Galicia Sur (IIS-Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - Susana Magadán
- CINBIO, Centro de Investigaciones Biomédicas, Universidade de Vigo, Immunology Group, Campus Universitario Lagoas, Marcosende, 36310, Vigo, Spain
- Instituto de Investigación Sanitaria Galicia Sur (IIS-Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - África González-Fernández
- CINBIO, Centro de Investigaciones Biomédicas, Universidade de Vigo, Immunology Group, Campus Universitario Lagoas, Marcosende, 36310, Vigo, Spain.
- Instituto de Investigación Sanitaria Galicia Sur (IIS-Galicia Sur), SERGAS-UVIGO, Vigo, Spain.
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354
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Nalbandian A, Sehgal K, Gupta A, Madhavan MV, McGroder C, Stevens JS, Cook JR, Nordvig AS, Shalev D, Sehrawat TS, Ahluwalia N, Bikdeli B, Dietz D, Der-Nigoghossian C, Liyanage-Don N, Rosner GF, Bernstein EJ, Mohan S, Beckley AA, Seres DS, Choueiri TK, Uriel N, Ausiello JC, Accili D, Freedberg DE, Baldwin M, Schwartz A, Brodie D, Garcia CK, Elkind MSV, Connors JM, Bilezikian JP, Landry DW, Wan EY. Post-acute COVID-19 syndrome. Nat Med 2021; 27:601-615. [PMID: 33753937 PMCID: PMC8893149 DOI: 10.1038/s41591-021-01283-z] [Citation(s) in RCA: 2613] [Impact Index Per Article: 871.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 02/09/2021] [Indexed: 02/07/2023]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the pathogen responsible for the coronavirus disease 2019 (COVID-19) pandemic, which has resulted in global healthcare crises and strained health resources. As the population of patients recovering from COVID-19 grows, it is paramount to establish an understanding of the healthcare issues surrounding them. COVID-19 is now recognized as a multi-organ disease with a broad spectrum of manifestations. Similarly to post-acute viral syndromes described in survivors of other virulent coronavirus epidemics, there are increasing reports of persistent and prolonged effects after acute COVID-19. Patient advocacy groups, many members of which identify themselves as long haulers, have helped contribute to the recognition of post-acute COVID-19, a syndrome characterized by persistent symptoms and/or delayed or long-term complications beyond 4 weeks from the onset of symptoms. Here, we provide a comprehensive review of the current literature on post-acute COVID-19, its pathophysiology and its organ-specific sequelae. Finally, we discuss relevant considerations for the multidisciplinary care of COVID-19 survivors and propose a framework for the identification of those at high risk for post-acute COVID-19 and their coordinated management through dedicated COVID-19 clinics.
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Affiliation(s)
- Ani Nalbandian
- Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Kartik Sehgal
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.
- Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.
- Harvard Medical School, Boston, Massachusetts, USA.
| | - Aakriti Gupta
- Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
- Clinical Trials Center, Cardiovascular Research Foundation, New York, New York, USA
- Center for Outcomes Research and Evaluation, Yale New Haven Hospital, New Haven, Connecticut, USA
| | - Mahesh V Madhavan
- Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
- Clinical Trials Center, Cardiovascular Research Foundation, New York, New York, USA
| | - Claire McGroder
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Jacob S Stevens
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Joshua R Cook
- Division of Endocrinology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Anna S Nordvig
- Department of Neurology, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Daniel Shalev
- Department of Psychiatry, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, and New York State Psychiatric Institute, New York, New York, USA
| | - Tejasav S Sehrawat
- Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Neha Ahluwalia
- Division of Cardiology, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Behnood Bikdeli
- Harvard Medical School, Boston, Massachusetts, USA
- Clinical Trials Center, Cardiovascular Research Foundation, New York, New York, USA
- Center for Outcomes Research and Evaluation, Yale New Haven Hospital, New Haven, Connecticut, USA
- Cardiovascular Division, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Donald Dietz
- Division of Infectious Diseases, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Caroline Der-Nigoghossian
- Clinical Pharmacy, New York-Presbyterian Hospital/Columbia University Irving Medical Center, New York, New York, USA
| | - Nadia Liyanage-Don
- Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Gregg F Rosner
- Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Elana J Bernstein
- Division of Rheumatology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Sumit Mohan
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Akinpelumi A Beckley
- Department of Rehabilitation and Regenerative Medicine, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - David S Seres
- Institute of Human Nutrition and Division of Preventive Medicine and Nutrition, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Toni K Choueiri
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Nir Uriel
- Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - John C Ausiello
- Division of Endocrinology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Domenico Accili
- Division of Endocrinology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Daniel E Freedberg
- Division of Digestive and Liver Diseases, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Matthew Baldwin
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Allan Schwartz
- Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Daniel Brodie
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Christine Kim Garcia
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Mitchell S V Elkind
- Department of Neurology, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Jean M Connors
- Harvard Medical School, Boston, Massachusetts, USA
- Division of Hematology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - John P Bilezikian
- Division of Endocrinology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Donald W Landry
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA
| | - Elaine Y Wan
- Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York, USA.
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355
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Caldo-Silva A, Furtado GE, Chupel MU, Bachi ALL, de Barros MP, Neves R, Marzetti E, Massart A, Teixeira AM. Effect of Training-Detraining Phases of Multicomponent Exercises and BCAA Supplementation on Inflammatory Markers and Albumin Levels in Frail Older Persons. Nutrients 2021; 13:1106. [PMID: 33800577 PMCID: PMC8066027 DOI: 10.3390/nu13041106] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/19/2021] [Accepted: 03/21/2021] [Indexed: 12/13/2022] Open
Abstract
Nowadays, it is accepted that the regular practice of exercise and branched-chain amino acids supplementation (BCAAs) can benefit the immune responses in older persons, prevent the occurrence of physical frailty (PF), cognitive decline, and aging-related comorbidities. However, the impact of their combination (as non-pharmacological interventions) in albumin and the inflammatory markers is not fully understood. Therefore, we investigated the effect of a 40-week multifactorial intervention [MIP, multicomponent exercise (ME) associated or not with BCAAs] on plasma levels of inflammatory markers and albumin in frail older persons (≥75 years old) living at residential care homes (RCH). This study consisted of a prospective, naturalistic, controlled clinical trial with four arms of multifactorial and experimental (interventions-wahshout-interventions) design. The intervention groups were ME + BCAAs (n = 8), ME (n = 7), BCAAs (n = 7), and control group (n = 13). Lower limb muscle-strength, cognitive profile, and PF tests were concomitantly evaluated with plasma levels of albumin, anti- and pro-inflammatory cytokines [Interleukin-10 (IL-10) and Tumor Necrosis Factor-alpha (TNF-α) respectively], TNF-α/IL-10 ratio, and myeloperoxidase (MPO) activity at four different time-points: Baseline (T1), after 16 weeks of multifactorial intervention (T2), then after a subsequent 8 weeks washout period (T3) and finally, after an additional 16 weeks of multifactorial intervention (T4). Improvement of cognitive profile and muscle strength-related albumin levels, as well as reduction in the TNF-α levels were found particularly in ME plus BCAAs group. No significant variations were observed over time for TNF-α/IL-10 ratio or MPO activity. Overall, the study showed that MIP triggered slight alterations in the inflammatory and physical function of the frail older participants, which could provide independence and higher quality of life for this population.
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Affiliation(s)
- Adriana Caldo-Silva
- University of Coimbra, Faculty of Sports Sciences and Physical Education—(FCDEF-UC), 3040-248 Coimbra, Portugal; (R.N.); (A.M.); (A.M.T.)
- Research Centre for Sport and Physical Activity, CIDAF-FCDEF-UC, 3040-248 Coimbra, Portugal;
| | - Guilherme Eustáquio Furtado
- Research Centre for Sport and Physical Activity, CIDAF-FCDEF-UC, 3040-248 Coimbra, Portugal;
- Health Sciences Research Unit: Nursing (UICISAE), Nursing School of Coimbra (ESEnfC), 3000-232 Coimbra, Portugal
| | - Matheus Uba Chupel
- Research Centre for Sport and Physical Activity, CIDAF-FCDEF-UC, 3040-248 Coimbra, Portugal;
| | - André L. L. Bachi
- Department of Otorhinolaryngology, ENT Lab, Federal University of São Paulo (UNIFESP), São Paulo 04025-002, Brazil;
- Post-Graduation Program in Health Sciences, Santo Amaro University (UNISA), São Paulo 04829-300, Brazil
| | - Marcelo P. de Barros
- Institute of Physical Activity Sciences and Sports (ICAFE), Interdisciplinary Program in Health Sciences, Cruzeiro do Sul University, São Paulo 01506-000, Brazil;
| | - Rafael Neves
- University of Coimbra, Faculty of Sports Sciences and Physical Education—(FCDEF-UC), 3040-248 Coimbra, Portugal; (R.N.); (A.M.); (A.M.T.)
| | - Emanuele Marzetti
- Fondazione Policlinico Universitario “Agostino Gemelli” IRCCS, 00168 Rome, Italy;
- Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Alain Massart
- University of Coimbra, Faculty of Sports Sciences and Physical Education—(FCDEF-UC), 3040-248 Coimbra, Portugal; (R.N.); (A.M.); (A.M.T.)
- Research Centre for Sport and Physical Activity, CIDAF-FCDEF-UC, 3040-248 Coimbra, Portugal;
| | - Ana Maria Teixeira
- University of Coimbra, Faculty of Sports Sciences and Physical Education—(FCDEF-UC), 3040-248 Coimbra, Portugal; (R.N.); (A.M.); (A.M.T.)
- Research Centre for Sport and Physical Activity, CIDAF-FCDEF-UC, 3040-248 Coimbra, Portugal;
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356
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Thymic Aging May Be Associated with COVID-19 Pathophysiology in the Elderly. Cells 2021; 10:cells10030628. [PMID: 33808998 PMCID: PMC8001029 DOI: 10.3390/cells10030628] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/01/2021] [Accepted: 03/10/2021] [Indexed: 02/06/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) caused the global pandemic of coronavirus disease 2019 (COVID-19) and particularly exhibits severe symptoms and mortality in elderly individuals. Mounting evidence shows that the characteristics of the age-related clinical severity of COVID-19 are attributed to insufficient antiviral immune function and excessive self-damaging immune reaction, involving T cell immunity and associated with pre-existing basal inflammation in the elderly. Age-related changes to T cell immunosenescence is characterized by not only restricted T cell receptor (TCR) repertoire diversity, accumulation of exhausted and/or senescent memory T cells, but also by increased self-reactive T cell- and innate immune cell-induced chronic inflammation, and accumulated and functionally enhanced polyclonal regulatory T (Treg) cells. Many of these changes can be traced back to age-related thymic involution/degeneration. How these changes contribute to differences in COVID-19 disease severity between young and aged patients is an urgent area of investigation. Therefore, we attempt to connect various clues in this field by reviewing and discussing recent research on the role of the thymus and T cells in COVID-19 immunity during aging (a synergistic effect of diminished responses to pathogens and enhanced responses to self) impacting age-related clinical severity of COVID-19. We also address potential combinational strategies to rejuvenate multiple aging-impacted immune system checkpoints by revival of aged thymic function, boosting peripheral T cell responses, and alleviating chronic, basal inflammation to improve the efficiency of anti-SARS-CoV-2 immunity and vaccination in the elderly.
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357
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Increased oxidative stress in elderly leprosy patients is related to age but not to bacillary load. PLoS Negl Trop Dis 2021; 15:e0009214. [PMID: 33690671 PMCID: PMC7978340 DOI: 10.1371/journal.pntd.0009214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 03/19/2021] [Accepted: 02/06/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Leprosy continues to be a public health problem in Brazil. Furthermore, detection rates in elderly people have increased, particularly those of multibacillary (L-Lep) patients, who are responsible for transmitting M. leprae. Part of the decline in physiological function during aging is due to increased oxidative damage and change in T cell subpopulations, which are critical in defense against the disease. It is not still clear how age-related changes like those related to oxidation affect elderly people with leprosy. The aim of this work was to verify whether the elderly leprosy patients have higher ROS production and how it can impact the evolution of leprosy. METHODOLOGY/PRINCIPAL FINDINGS 87 leprosy patients, grouped according to age range and clinical form of leprosy, and 25 healthy volunteers were analyzed. Gene expression analysis of antioxidant and oxidative burst enzymes were performed in whole blood using Biomark's microfluidic-based qPCR. The same genes were evaluated in skin lesion samples by RT-qPCR. The presence of oxidative damage markers (carbonylated proteins and 4-hydroxynonenal) was analyzed by a DNPH colorimetric assay and immunofluorescence. Carbonylated protein content was significantly higher in elderly compared to young patients. One year after multidrug therapy (MDT) discharge and M. leprae clearance, oxidative damage increased in young L-Lep patients but not in elderly ones. Both elderly T and L-Lep patients present higher 4-HNE in cutaneous lesions than the young, mainly surrounding memory CD8+ T cells. Furthermore, young L-Lep demonstrated greater ability to neutralize ROS compared to elderly L-Lep patients, who presented lower gene expression of antioxidant enzymes, mainly glutathione peroxidase. CONCLUSIONS/SIGNIFICANCE We conclude that elderly patients present exacerbated oxidative damage both in blood and in skin lesions and that age-related changes can be an important factor in leprosy immunopathogenesis. Ultimately, elderly patients could benefit from co-supplementation of antioxidants concomitant to MDT, to avoid worsening of the disease.
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358
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Pojero F, Candore G, Caruso C, Di Bona D, Groneberg DA, Ligotti ME, Accardi G, Aiello A. The Role of Immunogenetics in COVID-19. Int J Mol Sci 2021; 22:2636. [PMID: 33807915 PMCID: PMC7961811 DOI: 10.3390/ijms22052636] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/26/2021] [Accepted: 03/03/2021] [Indexed: 12/14/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19) is induced by SARS-CoV-2 and may arise as a variety of clinical manifestations, ranging from an asymptomatic condition to a life-threatening disease associated with cytokine storm, multiorgan and respiratory failure. The molecular mechanism behind such variability is still under investigation. Several pieces of experimental evidence suggest that genetic variants influencing the onset, maintenance and resolution of the immune response may be fundamental in predicting the evolution of the disease. The identification of genetic variants behind immune system reactivity and function in COVID-19 may help in the elaboration of personalized therapeutic strategies. In the frenetic look for universally shared treatment plans, those genetic variants that are common to other diseases/models may also help in addressing future research in terms of drug repurposing. In this paper, we discuss the most recent updates about the role of immunogenetics in determining the susceptibility to and the history of SARS-CoV-2 infection. We propose a narrative review of available data, speculating about lessons that we have learnt from other viral infections and immunosenescence, and discussing what kind of aspects of research should be deepened in order to improve our knowledge of how host genetic variability impacts the outcome for COVID-19 patients.
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Affiliation(s)
- Fanny Pojero
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neuroscience and Advanced Diagnostic, University of Palermo, 90134 Palermo, Italy; (F.P.); (G.C.); (M.E.L.); (G.A.)
| | - Giuseppina Candore
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neuroscience and Advanced Diagnostic, University of Palermo, 90134 Palermo, Italy; (F.P.); (G.C.); (M.E.L.); (G.A.)
| | - Calogero Caruso
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neuroscience and Advanced Diagnostic, University of Palermo, 90134 Palermo, Italy; (F.P.); (G.C.); (M.E.L.); (G.A.)
| | - Danilo Di Bona
- Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, 70124 Bari, Italy;
| | - David A. Groneberg
- Institute of Occupational, Social and Environmental Medicine, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60596 Frankfurt, Germany;
| | - Mattia E. Ligotti
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neuroscience and Advanced Diagnostic, University of Palermo, 90134 Palermo, Italy; (F.P.); (G.C.); (M.E.L.); (G.A.)
| | - Giulia Accardi
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neuroscience and Advanced Diagnostic, University of Palermo, 90134 Palermo, Italy; (F.P.); (G.C.); (M.E.L.); (G.A.)
| | - Anna Aiello
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neuroscience and Advanced Diagnostic, University of Palermo, 90134 Palermo, Italy; (F.P.); (G.C.); (M.E.L.); (G.A.)
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359
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Lu RJ, Wang EK, Benayoun BA. Functional genomics of inflamm-aging and immunosenescence. Brief Funct Genomics 2021; 21:43-55. [PMID: 33690792 DOI: 10.1093/bfgp/elab009] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 01/26/2021] [Accepted: 01/29/2021] [Indexed: 02/07/2023] Open
Abstract
The aging population is at a higher risk for age-related diseases and infections. This observation could be due to immunosenescence: the decline in immune efficacy of both the innate and the adaptive immune systems. Age-related immune decline also links to the concept of 'inflamm-aging,' whereby aging is accompanied by sterile chronic inflammation. Along with a decline in immune function, aging is accompanied by a widespread of 'omics' remodeling. Transcriptional landscape changes linked to key pathways of immune function have been identified across studies, such as macrophages having decreased expression of genes associated to phagocytosis, a major function of macrophages. Therefore, a key mechanism underlying innate immune cell dysfunction during aging may stem from dysregulation of youthful genomic networks. In this review, we discuss both molecular and cellular phenotypes of innate immune cells that contribute to age-related inflammation.
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Affiliation(s)
- Ryan J Lu
- Leonard Davis School of Gerontology at the University of Southern California
| | - Emily K Wang
- Leonard Davis School of Gerontology at the University of Southern California
| | - Bérénice A Benayoun
- Leonard Davis School of Gerontology at the University of Southern California
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360
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Storey S, Zhang Z, Luo X, Von Ah D, Metzger M, Zhang J, Jakka A, Huang K. Association of Comorbid Diabetes With Clinical Outcomes and Healthcare Utilization in Colorectal Cancer Survivors. Oncol Nurs Forum 2021; 48:195-206. [PMID: 33600395 DOI: 10.1188/21.onf.195-206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVES To compare clinical outcomes and healthcare utilization in colorectal cancer (CRC) survivors with and without diabetes. SAMPLE & SETTING CRC survivors (N = 3,287) were identified from a statewide electronic health record database using International Classification of Diseases (ICD) codes. Data were extracted on adults aged 21 years or older with an initial diagnosis of stage II or III CRC with diabetes present before CRC diagnosis or no diagnosis of diabetes (control). METHODS & VARIABLES ICD codes were used to extract diabetes diagnosis and clinical outcome variables. Healthcare utilization was determined by encounter type. Data were analyzed using descriptive statistics, multivariable logistic, and Cox regression. RESULTS CRC survivors with diabetes were more likely to develop anemia and infection than CRC survivors without diabetes. In addition, CRC survivors with diabetes were more likely to utilize emergency resources sooner than CRC survivors without diabetes. IMPLICATIONS FOR NURSING Oncology nurses can facilitate the early identification of high-risk survivor groups, reducing negative clinical outcomes and unnecessarily high healthcare resource utilization in CRC survivors with diabetes.
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Affiliation(s)
| | | | - Xiao Luo
- Indiana University-Purdue University Indianapolis
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361
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Saint-Criq V, Lugo-Villarino G, Thomas M. Dysbiosis, malnutrition and enhanced gut-lung axis contribute to age-related respiratory diseases. Ageing Res Rev 2021; 66:101235. [PMID: 33321253 DOI: 10.1016/j.arr.2020.101235] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/23/2020] [Accepted: 12/09/2020] [Indexed: 12/12/2022]
Abstract
Older people are at an increased risk of developing respiratory diseases such as chronic obstructive pulmonary diseases, asthma, idiopathic pulmonary fibrosis or lung infections. Susceptibility to these diseases is partly due to the intrinsic ageing process, characterized by genomic, cellular and metabolic hallmarks and immunosenescence, and is associated with changes in the intestinal microbiota. Importantly, in the lungs, ageing is also associated with a dysbiosis and loss of resilience of the resident microbiota and alterations of the gut-lung axis. Notably, as malnutrition is often observed in the elderly, nutrition is one of the most accessible modifiable factors affecting both senescence and microbiota. This article reviews the changes affecting the lung and its resident microbiota during ageing, as well as the interconnections between malnutrition, senescence, microbiota, gut-lung axis and respiratory health. As the communication along the gut-lung axis becomes more permissive with ageing, this review also explores the evidence that the gut and lung microbiota are key players in the maintenance of healthy lungs, and as such, are potential targets for nutrition-based preventive strategies against lung disease in elderly populations.
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362
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Rabi FA, Al Zoubi MS, Al‐Iede MM, Kasasbeh G, Badran EF. Coronaviruses in children: A review of potential mechanisms of childhood protection. Acta Paediatr 2021; 110:765-772. [PMID: 33247469 PMCID: PMC7753280 DOI: 10.1111/apa.15691] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 10/28/2020] [Accepted: 11/24/2020] [Indexed: 12/24/2022]
Abstract
Aim The 2019 coronavirus disease (COVID‐19) has spread worldwide and the number of cases continues to rise exponentially. Epidemiologic reports indicate that severity of illness increases with age. However, the reasons behind the relative protection of children and infants are unclear. Whether the rationale is host‐related or virus dependent is important to determine since the latter could change with viral mutations. We review factors that could affect the susceptibility of children to the novel coronavirus. Methods We search publications indexed on PUBMED. Results Descriptions of the pathophysiology of current and previous coronavirus infections suggest several viral targets and immunomodulatory pathways affecting the severity of illness. There is limited evidence to suggest age‐variability of viral cell receptors and transmembrane co‐factors required for coronavirus entry and replication. However, the ensuing cytokine storm and the effect of higher melatonin in children are age‐dependent and could explain decreased disease variability in children. Conclusion We believe that current evidence suggests host factors can play a role in disease severity in children and thus may remain protective despite potential virus mutation in the future. However, we recognise and discuss avenues of future research that can further illuminate the reasons children are protected from severe COVID‐19 illness.
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Affiliation(s)
- Firas A. Rabi
- Department of Clinical Sciences Faculty of Medicine Yarmouk University Irbid Jordan
| | - Mazhar S. Al Zoubi
- Department of Basic Medical Sciences Faculty of Medicine Yarmouk University Irbid Jordan
| | | | | | - Eman Farouk Badran
- Department of Pediatrics Faculty of Medicine Jordan University Amman Jordan
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363
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Zarski LM, Giessler KS, Jacob SI, Weber PSD, McCauley AG, Lee Y, Soboll Hussey G. Identification of Host Factors Associated with the Development of Equine Herpesvirus Myeloencephalopathy by Transcriptomic Analysis of Peripheral Blood Mononuclear Cells from Horses. Viruses 2021; 13:v13030356. [PMID: 33668216 PMCID: PMC7995974 DOI: 10.3390/v13030356] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 12/13/2022] Open
Abstract
Equine herpesvirus-1 is the cause of respiratory disease, abortion, and equine herpesvirus myeloencephalopathy (EHM) in horses worldwide. EHM affects as many as 14% of infected horses and a cell-associated viremia is thought to be central for EHM pathogenesis. While EHM is infrequent in younger horses, up to 70% of aged horses develop EHM. The aging immune system likely contributes to EHM pathogenesis; however, little is known about the host factors associated with clinical EHM. Here, we used the “old mare model” to induce EHM following EHV-1 infection. Peripheral blood mononuclear cells (PBMCs) of horses prior to infection and during viremia were collected and RNA sequencing with differential gene expression was used to compare the transcriptome of horses that did (EHM group) and did not (non-EHM group) develop clinical EHM. Interestingly, horses exhibiting EHM did not show respiratory disease, while non-EHM horses showed significant respiratory disease starting on day 2 post infection. Multiple immune pathways differed in EHM horses in response to EHV-1. These included an upregulation of IL-6 gene expression, a dysregulation of T-cell activation through AP-1 and responses skewed towards a T-helper 2 phenotype. Further, a dysregulation of coagulation and an upregulation of elements in the progesterone response were observed in EHM horses.
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Affiliation(s)
- Lila M. Zarski
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI 48824, USA; (L.M.Z.); (K.S.G.); (S.I.J.); (A.G.M.); (Y.L.)
| | - Kim S. Giessler
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI 48824, USA; (L.M.Z.); (K.S.G.); (S.I.J.); (A.G.M.); (Y.L.)
| | - Sarah I. Jacob
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI 48824, USA; (L.M.Z.); (K.S.G.); (S.I.J.); (A.G.M.); (Y.L.)
| | - Patty Sue D. Weber
- Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, MI 48824, USA;
| | - Allison G. McCauley
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI 48824, USA; (L.M.Z.); (K.S.G.); (S.I.J.); (A.G.M.); (Y.L.)
| | - Yao Lee
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI 48824, USA; (L.M.Z.); (K.S.G.); (S.I.J.); (A.G.M.); (Y.L.)
| | - Gisela Soboll Hussey
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI 48824, USA; (L.M.Z.); (K.S.G.); (S.I.J.); (A.G.M.); (Y.L.)
- Correspondence:
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364
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Special Issue "Centenarians-A Model to Study the Molecular Basis of Lifespan and Healthspan". Int J Mol Sci 2021; 22:ijms22042044. [PMID: 33669501 PMCID: PMC7922801 DOI: 10.3390/ijms22042044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 02/10/2021] [Indexed: 12/23/2022] Open
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365
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Harper A, Vijayakumar V, Ouwehand AC, ter Haar J, Obis D, Espadaler J, Binda S, Desiraju S, Day R. Viral Infections, the Microbiome, and Probiotics. Front Cell Infect Microbiol 2021; 10:596166. [PMID: 33643929 PMCID: PMC7907522 DOI: 10.3389/fcimb.2020.596166] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 12/23/2020] [Indexed: 01/07/2023] Open
Abstract
Viral infections continue to cause considerable morbidity and mortality around the world. Recent rises in these infections are likely due to complex and multifactorial external drivers, including climate change, the increased mobility of people and goods and rapid demographic change to name but a few. In parallel with these external factors, we are gaining a better understanding of the internal factors associated with viral immunity. Increasingly the gastrointestinal (GI) microbiome has been shown to be a significant player in the host immune system, acting as a key regulator of immunity and host defense mechanisms. An increasing body of evidence indicates that disruption of the homeostasis between the GI microbiome and the host immune system can adversely impact viral immunity. This review aims to shed light on our understanding of how host-microbiota interactions shape the immune system, including early life factors, antibiotic exposure, immunosenescence, diet and inflammatory diseases. We also discuss the evidence base for how host commensal organisms and microbiome therapeutics can impact the prevention and/or treatment of viral infections, such as viral gastroenteritis, viral hepatitis, human immunodeficiency virus (HIV), human papilloma virus (HPV), viral upper respiratory tract infections (URTI), influenza and SARS CoV-2. The interplay between the gastrointestinal microbiome, invasive viruses and host physiology is complex and yet to be fully characterized, but increasingly the evidence shows that the microbiome can have an impact on viral disease outcomes. While the current evidence base is informative, further well designed human clinical trials will be needed to fully understand the array of immunological mechanisms underlying this intricate relationship.
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Affiliation(s)
- Ashton Harper
- ADM Health & Wellness, Medical Affairs Department, Somerset, United Kingdom
| | | | - Arthur C. Ouwehand
- Global Health and Nutrition Sciences, DuPont Nutrition and Biosciences, Kantvik, Finland
| | | | - David Obis
- Innovation Science & Nutrition Department, Danone Nutricia Research, Palaiseau, France
| | | | - Sylvie Binda
- Lallemand Health Solutions, Montreal, QC, Canada
| | | | - Richard Day
- ADM Health & Wellness, Medical Affairs Department, Somerset, United Kingdom
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366
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Chronic Itch of Unknown Origin Is Associated With an Enhanced Th2 Skin Immune Profile. Am J Dermatopathol 2021; 43:773-775. [PMID: 33577177 DOI: 10.1097/dad.0000000000001902] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
ABSTRACT Chronic pruritus of unknown origin (CPUO) is described as chronic itch lasting longer than 6 weeks in the absence of a defined skin rash and any known causative disease process. A retrospective study was performed on biopsy samples from patients with CPUO and normal controls to compare the immune profiles of these patients with healthy individuals. We used dual CD3/T-bet and CD3/GATA3 immunohistochemical staining to assess for T-cells expressing Th1 versus Th2 transcription factors, respectively. Our data showed that CD3+ cells of patients with CPUO co-express significantly more GATA3 compared with normal controls. Meanwhile, the normal control skin showed a much more balanced T-bet/GATA3 ratio of co-expression. Our data suggest an enrichment of Th2 cells in CPUO skin by T cell/GATA3 co-staining, supporting that CPUO is increasingly considered a type 2/Th2 cell-associated disease. We thus speculate that type 2 cytokine blockade-based therapies may represent effective treatments for CPUO.
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367
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Jones E, Sheng J, Carlson J, Wang S. Aging-induced fragility of the immune system. J Theor Biol 2021; 510:110473. [PMID: 32941914 PMCID: PMC7487974 DOI: 10.1016/j.jtbi.2020.110473] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/27/2020] [Accepted: 08/31/2020] [Indexed: 01/03/2023]
Abstract
The adaptive and innate branches of the vertebrate immune system work in close collaboration to protect organisms from harmful pathogens. As an organism ages its immune system undergoes immunosenescence, characterized by declined performance or malfunction in either immune branch, which can lead to disease and death. In this study we develop a mathematical framework of coupled innate and adaptive immune responses, namely the integrated immune branch (IIB) model. This model describes dynamics of immune components in both branches, uses a shape-space representation to encode pathogen-specific immune memory, and exhibits three steady states - health, septic death, and chronic inflammation - qualitatively similar to clinically-observed immune outcomes. In this model, the immune system (initialized in the health state) is subjected to a sequence of pathogen encounters, and we use the number of prior pathogen encounters as a proxy for the "age" of the immune system. We find that repeated pathogen encounters may trigger a fragility in which any encounter with a novel pathogen will cause the system to irreversibly switch from health to chronic inflammation. This transition is consistent with the onset of "inflammaging", a condition observed in aged individuals who experience chronic low-grade inflammation even in the absence of pathogens. The IIB model predicts that the onset of chronic inflammation strongly depends on the history of encountered pathogens; the timing of onset differs drastically when the same set of infections occurs in a different order. Lastly, the coupling between the innate and adaptive immune branches generates a trade-off between rapid pathogen clearance and a delayed onset of immunosenescence. Overall, by considering the complex feedback between immune compartments, our work suggests potential mechanisms for immunosenescence and provides a theoretical framework at the system level and on the scale of an organism's lifetime to account for clinical observations.
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Affiliation(s)
- Eric Jones
- Department of Physics, University of California, Santa Barbara, CA 93106, USA.
| | - Jiming Sheng
- Department of Physics & Astronomy, University of California, Los Angeles, CA 90095, USA
| | - Jean Carlson
- Department of Physics, University of California, Santa Barbara, CA 93106, USA
| | - Shenshen Wang
- Department of Physics & Astronomy, University of California, Los Angeles, CA 90095, USA.
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The potential of rapalogs to enhance resilience against SARS-CoV-2 infection and reduce the severity of COVID-19. LANCET HEALTHY LONGEVITY 2021; 2:e105-e111. [PMID: 33665645 PMCID: PMC7906698 DOI: 10.1016/s2666-7568(20)30068-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
COVID-19 disproportionately affects older people, with likelihood of severe complications and death mirroring that of other age-associated diseases. Inhibition of the mechanistic target of rapamycin complex 1 (mTORC1) has been shown to delay or reverse many age-related phenotypes, including declining immune function. Rapamycin (sirolimus) and rapamycin derivatives are US Food and Drug Administration-approved inhibitors of mTORC1 with broad clinical utility and well established dosing and safety profiles. Based on preclinical and clinical evidence, a strong case can be made for immediate large-scale clinical trials to assess whether rapamycin and other mTORC1 inhibitors can prevent COVID-19 infection in these populations and also to determine whether these drugs can improve outcomes in patients with severe COVID-19.
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369
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Nörenberg J, Jaksó P, Barakonyi A. Gamma/Delta T Cells in the Course of Healthy Human Pregnancy: Cytotoxic Potential and the Tendency of CD8 Expression Make CD56+ γδT Cells a Unique Lymphocyte Subset. Front Immunol 2021; 11:596489. [PMID: 33603738 PMCID: PMC7884463 DOI: 10.3389/fimmu.2020.596489] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/17/2020] [Indexed: 01/21/2023] Open
Abstract
To date, pregnancy is an immunological paradox. The semi-allogenic fetus must be accepted by the maternal immune system, while defense against pathogens and immune surveillance cannot be compromised. Gamma/delta T cells are believed to play an important role in this immunological puzzle. In this study, we analyzed peripheral blood CD56+ γδT cells from pregnant women (1st, 2nd, and 3rd trimester) and non-pregnant women by multicolor flow cytometry. Interestingly, γδT cells represent almost half of CD3+/CD56+ cells. Among γδT cells, the CD56+ population expands in the 2nd and 3rd trimester. CD56+ γδT cells maintained a predominantly CD4–/CD8– or CD8+ phenotype, while CD56– γδT cells were in similar rates CD4–/CD8– or CD4+ during pregnancy. Investigation of the lysosomal degranulation marker CD107a revealed a preserved elevated rate of potentially cytotoxic CD56+ γδT cells in pregnancy, while their cytotoxic strength was reduced. Furthermore, CD56+ γδT cells continuously showed a higher prevalence of PD-1 expression. CD56+ γδT cells’ rate of PD-1 increased in the 1st trimester and decreased hereafter back to normal level. We correlated the cytotoxic potential and the expression of the inhibitory immune checkpoint PD-1 and were able to demonstrate that highly cytotoxic cells within this CD56+ γδT population tend to express PD-1, which might allow the inhibition of these cells after binding its ligand in the placenta. These findings should support the understanding of the complex processes, which ensure the maintenance of pregnancy.
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Affiliation(s)
- Jasper Nörenberg
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Pécs, Hungary
| | - Pál Jaksó
- Department of Pathology, Medical School, University of Pécs, Pécs, Hungary
| | - Alíz Barakonyi
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Pécs, Hungary.,Janos Szentagothai Research Centre, University of Pécs, Pécs, Hungary
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370
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Najm A, Alunno A, Mariette X, Terrier B, De Marco G, Emmel J, Mason L, McGonagle DG, Machado PM. Pathophysiology of acute respiratory syndrome coronavirus 2 infection: a systematic literature review to inform EULAR points to consider. RMD Open 2021; 7:e001549. [PMID: 33574116 PMCID: PMC7880117 DOI: 10.1136/rmdopen-2020-001549] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/08/2021] [Accepted: 01/14/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The SARS-CoV-2 pandemic is a global health problem. Beside the specific pathogenic effect of SARS-CoV-2, incompletely understood deleterious and aberrant host immune responses play critical roles in severe disease. Our objective was to summarise the available information on the pathophysiology of COVID-19. METHODS Two reviewers independently identified eligible studies according to the following PICO framework: P (population): patients with SARS-CoV-2 infection; I (intervention): any intervention/no intervention; C (comparator): any comparator; O (outcome) any clinical or serological outcome including but not limited to immune cell phenotype and function and serum cytokine concentration. RESULTS Of the 55 496 records yielded, 84 articles were eligible for inclusion according to question-specific research criteria. Proinflammatory cytokine expression, including interleukin-6 (IL-6), was increased, especially in severe COVID-19, although not as high as other states with severe systemic inflammation. The myeloid and lymphoid compartments were differentially affected by SARS-CoV-2 infection depending on disease phenotype. Failure to maintain high interferon (IFN) levels was characteristic of severe forms of COVID-19 and could be related to loss-of-function mutations in the IFN pathway and/or the presence of anti-IFN antibodies. Antibody response to SARS-CoV-2 infection showed a high variability across individuals and disease spectrum. Multiparametric algorithms showed variable diagnostic performances in predicting survival, hospitalisation, disease progression or severity, and mortality. CONCLUSIONS SARS-CoV-2 infection affects both humoral and cellular immunity depending on both disease severity and individual parameters. This systematic literature review informed the EULAR 'points to consider' on COVID-19 pathophysiology and immunomodulatory therapies.
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Affiliation(s)
- Aurélie Najm
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Alessia Alunno
- Department of Medicine, Rheumatology Unit, University of Perugia, Perugia, Italy
| | - Xavier Mariette
- INSERM U1184, Center for Immunology of Viral Infections and Autoimmune Diseases, Paris-Sud University, Paris-Saclay University, Le Kremlin-Bicêtre, France
- Department of Rheumatology, AP-HP, Paris-Sud University Hospitals, Le Kremlin Bicêtre Hospital, Le Kremlin-Bicêtre, France
| | - Benjamin Terrier
- University of Paris, Assistance Publique-Hôpitaux de Paris, Cochin Hospital, Paris, France
- INSERM U970, PARCC, Paris, Île-de-France, France
| | - Gabriele De Marco
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, NIHR Leeds Biomedical Research Centre, Leeds, West Yorkshire, UK
- Leeds Biomedical Research Centre, Leeds Teaching Hospitals NHS Trust, Leeds, West Yorkshire, UK
| | - Jenny Emmel
- Medical Education, Library & Evidence Research Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Laura Mason
- Medical Education, Library & Evidence Research Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Dennis G McGonagle
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, NIHR Leeds Biomedical Research Centre, Leeds, West Yorkshire, UK
- Chapel Allerton Hospital, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, NIHR Leeds Biomedical Research Centre, Leeds, UK
| | - Pedro M Machado
- Centre for Rheumatology, National Institute for Health Research (NIHR) University College London Hospitals (UCLH) Biomedical Research Centre (BRC), University College London Hospitals (UCLH) NHS Foundation Trus, London, UK
- Department of Rheumatology, Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
- Centre for Rheumatology & Department of Neuromuscular Diseases, University College London, London, UK
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Abstract
Human lifespan is now longer than ever and, as a result, modern society is getting older. Despite that, the detailed mechanisms behind the ageing process and its impact on various tissues and organs remain obscure. In general, changes in DNA, RNA and protein structure throughout life impair their function. Haematopoietic ageing refers to the age-related changes affecting a haematopoietic system. Aged blood cells display different functional aberrations depending on their cell type, which might lead to the development of haematologic disorders, including leukaemias, anaemia or declining immunity. In contrast to traditional bulk assays, which are not suitable to dissect cell-to-cell variation, single-cell-level analysis provides unprecedented insight into the dynamics of age-associated changes in blood. In this Review, we summarise recent studies that dissect haematopoietic ageing at the single-cell level. We discuss what cellular changes occur during haematopoietic ageing at the genomic, transcriptomic, epigenomic and metabolomic level, and provide an overview of the benefits of investigating those changes with single-cell precision. We conclude by considering the potential clinical applications of single-cell techniques in geriatric haematology, focusing on the impact on haematopoietic stem cell transplantation in the elderly and infection studies, including recent COVID-19 research.
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Affiliation(s)
- Paulina M Strzelecka
- Department of Hematology, Oncology, and Tumor Immunology, Charité - Universitätsmedizin Berlin, 13353 Berlin, Germany
- German Consortium for Translational Cancer Research (DKTK), 69120 Heidelberg, Germany
| | - Frederik Damm
- Department of Hematology, Oncology, and Tumor Immunology, Charité - Universitätsmedizin Berlin, 13353 Berlin, Germany
- German Consortium for Translational Cancer Research (DKTK), 69120 Heidelberg, Germany
- Berlin Institute of Health, 10178 Berlin, Germany
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372
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Bajaj V, Gadi N, Spihlman AP, Wu SC, Choi CH, Moulton VR. Aging, Immunity, and COVID-19: How Age Influences the Host Immune Response to Coronavirus Infections? Front Physiol 2021; 11:571416. [PMID: 33510644 PMCID: PMC7835928 DOI: 10.3389/fphys.2020.571416] [Citation(s) in RCA: 247] [Impact Index Per Article: 82.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 12/16/2020] [Indexed: 01/08/2023] Open
Abstract
The novel coronavirus severe acute respiratory syndrome coronavirus 2 causing the Coronavirus disease (COVID-19) pandemic has ravaged the world with over 72 million total cases and over 1.6 million deaths worldwide as of early December 2020. An overwhelming preponderance of cases and deaths is observed within the elderly population, and especially in those with pre-existing conditions and comorbidities. Aging causes numerous biological changes in the immune system, which are linked to age-related illnesses and susceptibility to infectious diseases. Age-related changes influence the host immune response and therefore not only weaken the ability to fight respiratory infections but also to mount effective responses to vaccines. Immunosenescence and inflamm-aging are considered key features of the aging immune system wherein accumulation of senescent immune cells contribute to its decline and simultaneously increased inflammatory phenotypes cause immune dysfunction. Age-related quantitative and qualitative changes in the immune system affect cells and soluble mediators of both the innate and adaptive immune responses within lymphoid and non-lymphoid peripheral tissues. These changes determine not only the susceptibility to infections, but also disease progression and clinical outcomes thereafter. Furthermore, the response to therapeutics and the immune response to vaccines are influenced by age-related changes within the immune system. Therefore, better understanding of the pathophysiology of aging and the immune response will not only help understand age-related diseases but also guide targeted management strategies for deadly infectious diseases like COVID-19.
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Affiliation(s)
- Varnica Bajaj
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
- School of Medicine, Boston University, Boston, MA, United States
| | - Nirupa Gadi
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
- School of Medicine, Boston University, Boston, MA, United States
| | - Allison P. Spihlman
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
- School of Medicine, Boston University, Boston, MA, United States
| | - Samantha C. Wu
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
- School of Medicine, Boston University, Boston, MA, United States
| | - Christopher H. Choi
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
- School of Medicine, Boston University, Boston, MA, United States
| | - Vaishali R. Moulton
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
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373
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Tariq S, Van Eeden C, Tervaert JWC, Osman MS. COVID-19, rheumatic diseases and immune dysregulation-a perspective. Clin Rheumatol 2021; 40:433-442. [PMID: 33411143 PMCID: PMC7788381 DOI: 10.1007/s10067-020-05529-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/30/2020] [Accepted: 11/26/2020] [Indexed: 12/26/2022]
Abstract
The COVID-19 pandemic has resulted in widespread hospitalisations and deaths around the world. As patients with rheumatic diseases generally have increased risk of infections and complications, understandably, there is significant concern of the impact of SARS-CoV-2 on these patients. However, there is a paucity of data in rheumatic patients. We review mechanisms through which SARS-CoV-2 results in infection, including ACE2 receptor, and complications (including immune dysregulation, thrombosis and complement activation). We assess these pathways in patients with rheumatic disease and those on immune modulating therapy. Although data thus far does not appear to show worse outcomes in rheumatic patients as a whole, given alterations in the underlying immune pathways in certain diseases (such as systemic lupus erythematosus), we posit that the risk is not equal in all rheumatic patients. We also discuss the benefit of underlying disease control with respect to COVID-19 risk reduction and potential increased risk of disease flares following viral infection from an immune standpoint.
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Affiliation(s)
- Shahna Tariq
- Division of Rheumatology, Department of Medicine, University of Alberta, 8-130 Clinical Sciences Building, Edmonton, Alberta, T6G 2B7, Canada
| | - Charmaine Van Eeden
- Division of Rheumatology, Department of Medicine, University of Alberta, 8-130 Clinical Sciences Building, Edmonton, Alberta, T6G 2B7, Canada
| | - Jan Willem Cohen Tervaert
- Division of Rheumatology, Department of Medicine, University of Alberta, 8-130 Clinical Sciences Building, Edmonton, Alberta, T6G 2B7, Canada
| | - Mohammed S Osman
- Division of Rheumatology, Department of Medicine, University of Alberta, 8-130 Clinical Sciences Building, Edmonton, Alberta, T6G 2B7, Canada.
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374
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Rodriguez Martin RR, Gonzalez Gonzalez O, Rodriguez Gonzalez C, Rodriguez Gonzalez RR. Biomodulina T (InmunyVital ®) Restores T Cells and Helps Contain COVID-19. Front Immunol 2020; 11:606447. [PMID: 33362793 PMCID: PMC7756009 DOI: 10.3389/fimmu.2020.606447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/16/2020] [Indexed: 11/13/2022] Open
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375
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Older adults lack SARS CoV-2 cross-reactive T lymphocytes directed to human coronaviruses OC43 and NL63. Sci Rep 2020; 10:21447. [PMID: 33293664 PMCID: PMC7722724 DOI: 10.1038/s41598-020-78506-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 11/18/2020] [Indexed: 12/15/2022] Open
Abstract
Currently, infections with SARS-Coronavirus-2 (SARS-CoV-2), the causative agent of the COVID-19 pandemic, are responsible for substantial morbidity and mortality worldwide. Older adults subjects > 60 years of age account for > 95% of the over one million fatal cases reported to date. It is unclear why in this age group SARS-CoV-2 infection causes more severe disease than in young adults. We hypothesized that differences in SARS-CoV-2 cross-reactive cellular immunity induced after infection with human coronaviruses (HCoVs), like OC43 and NL63, were at the basis of the differential mortality (and morbidity) observed after SARS-CoV-2 infection, because a small proportion of HCoV-specific T cells cross-react with SARS-CoV-2. Our data demonstrate that pre-existing T cell immunity induced by circulating human alpha- and beta-HCoVs is present in young adult individuals, but virtually absent in older adult subjects. Consequently, the frequency of cross-reactive T cells directed to the novel pandemic SARS-CoV-2 was minimal in most older adults. To the best of our knowledge, this is the first time that the presence of cross-reactive T cells to SARS-CoV-2 is compared in young and older adults. Our findings provide at least a partial explanation for the more severe clinical outcome of SARS-CoV-2 infection observed in the elderly. Moreover, this information could help to design efficacious vaccines for this age group, aiming at the induction of cell-mediated immunity.
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376
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Gaissmaier L, Christopoulos P. Immune Modulation in Lung Cancer: Current Concepts and Future Strategies. Respiration 2020; 99:1-27. [PMID: 33291116 DOI: 10.1159/000510385] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 07/10/2020] [Indexed: 12/24/2022] Open
Abstract
Cancer immunotherapy represents the most dynamic field of biomedical research currently, with thoracic immuno-oncology as a forerunner. PD-(L)1 inhibitors are already part of standard first-line treatment for both non-small-cell and small-cell lung cancer, while unprecedented 5-year survival rates of 15-25% have been achieved in pretreated patients with metastatic disease. Evolving strategies are mainly aiming for improvement of T-cell function, increase of immune activation in the tumor microenvironment (TME), and supply of tumor-reactive lymphocytes. Several novel therapeutics have demonstrated preclinical efficacy and are increasingly used in rational combinations within clinical trials. Two overarching trends dominate: extension of immunotherapy to earlier disease stages, mainly as neoadjuvant treatment, and a shift of focus towards multivalent, individualized, mutatome-based antigen-specific modalities, mainly adoptive cell therapies and cancer vaccines. The former ensures ample availability of treated and untreated patient samples, the latter facilitates deeper mechanistic insights, and both in combination build an overwhelming force that is accelerating progress and driving the greatest revolution cancer medicine has seen so far. Today, immune modulation represents the most potent therapeutic modality in oncology, the most important topic in clinical and translational cancer research, and arguably our greatest, meanwhile justified hope for achieving cure of pulmonary neoplasms and other malignancies in the next future.
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Affiliation(s)
- Lena Gaissmaier
- Department of Thoracic Oncology, Thoraxklinik at Heidelberg University Hospital, Heidelberg, Germany
- Translational Lung Research Center Heidelberg (TLRC-H), German Center for Lung Research (DZL), Heidelberg, Germany
| | - Petros Christopoulos
- Department of Thoracic Oncology, Thoraxklinik at Heidelberg University Hospital, Heidelberg, Germany,
- Translational Lung Research Center Heidelberg (TLRC-H), German Center for Lung Research (DZL), Heidelberg, Germany,
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377
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Comparative Study of Senescent Th Biomarkers in Healthy Donors and Early Arthritis Patients. Analysis of VPAC Receptors and Their Influence. Cells 2020; 9:cells9122592. [PMID: 33291545 PMCID: PMC7761848 DOI: 10.3390/cells9122592] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 02/07/2023] Open
Abstract
Pro-inflammatory CD4+CD28− T cells are characteristic of immunosenescence, but also of several autoimmune/inflammatory diseases. Vasoactive intestinal peptide (VIP) acts as an anti-inflammatory and immunomodulatory mediator on these cells. Our objective was to study the mutual influence between senescent Th cells and VIP axis in early arthritis (EA), comparing with non-EA donors. We characterized the correlation between senescent Th cells and clinic parameters of EA as well as the behavior of senescent Th biomarkers by real-time PCR. Clinical data were systematically recorded at baseline and after 6 months of follow-up. The number of CD4+CD28− T cells measured by sorting is higher in patients who initially meet ACR classification criteria for rheumatoid arthritis (RA) compared to those who were classified as undifferentiated arthritis (UA). A slight positive correlation between EA CD4+CD28− T cells and CRP or ESR and a negative correlation with bone mineral density were found. Th senescent biomarkers in EA CD4+CD28− T cells were similar to donors, however some of them increased after 6 months of follow-up. VPAC receptors were analyzed by real-time PCR and immunofluorescence, and CD4+CD28− T cells showed higher expression of VPAC2 and lower of VPAC1, VPAC2 showing a significant increased expression in EA cells. Sorted CD4+CD28− T cells were in vitro expanded in presence of VIP, wherein VIP increased senescent biomarker CD27, while it diminished CD57 or NKG2 senescent biomarkers. Our study demonstrates for the first time the existence of a link between senescent Th cells and the VIP axis.
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378
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Armitage WJ, Winton HL, Jones MNA, Downward L, Crewe JM, Rogers CA, Tole DM, Dick AD. Corneal Transplant Follow-up Study II: a randomised trial to determine whether HLA class II matching reduces the risk of allograft rejection in penetrating keratoplasty. Br J Ophthalmol 2020; 106:42-46. [PMID: 33268345 DOI: 10.1136/bjophthalmol-2020-317543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/02/2020] [Accepted: 11/14/2020] [Indexed: 12/16/2022]
Abstract
PURPOSE A randomised trial to test the hypothesis that human leucocyte antigen (HLA) class II matching reduces the risk of allograft rejection in high-risk penetrating keratoplasty (PK). METHODS All transplants were matched for HLA class I antigens (≤2 mismatches at the A and B loci) and corneas were allocated to patients by cohort minimisation to achieve 0, 1 or 2 HLA class II antigen mismatches. The corneal transplants (n=1133) were followed for 5 years. The primary outcome measure was time to first rejection episode. RESULTS Cox regression analysis found no influence of HLA class II mismatching on risk of immunological rejection (HR 1.13; 95% CI 0.79 to 1.63; p=0.51). The risk of rejection in recipients older than 60 years was halved compared with recipients ≤40 years (HR 0.51; 95% CI 0.36 to 0.73; p=0.0003). Rejection was also more likely where cataract surgery had been performed after PK (HR 3.68; 95% CI 1.95 to 6.93; p<0.0001). In univariate analyses, preoperative factors including chronic glaucoma (p=0.02), vascularisation (p=0.01), inflammation (p=0.03), ocular surface disease (p=0.0007) and regrafts (p<0.001) all increased the risk of rejection. In the Cox model, however, none of these factors was individually significant but rejection was more likely where≥2 preoperative risk factors were present (HR 2.11; 95% CI 1.26 to 3.47; p<0.003). CONCLUSIONS HLA class II matching, against a background of HLA class I matching, did not reduce the risk of allograft rejection. Younger recipient age, the presence of ≥2 preoperative risk factors and cataract surgery after PK all markedly increased the risk of allograft rejection. TRIAL REGISTRATION NUMBER ISRCTN25094892.
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Affiliation(s)
- W John Armitage
- Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Helen L Winton
- Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | | | | | - Julie M Crewe
- Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Chris A Rogers
- Bristol Trials Centre, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | | | - Andrew D Dick
- Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
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379
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Moskalev A, Stambler I, Caruso C. Innate and Adaptive Immunity in Aging and Longevity: The Foundation of Resilience. Aging Dis 2020; 11:1363-1373. [PMID: 33269094 PMCID: PMC7673842 DOI: 10.14336/ad.2020.0603] [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: 05/04/2020] [Accepted: 06/03/2020] [Indexed: 12/15/2022] Open
Abstract
The interrelation of the processes of immunity and senescence now receives an unprecedented emphasis during the COVID-19 pandemic, which brings to the fore the critical need to combat immunosenescence and improve the immune function and resilience of older persons. Here we review the historical origins and the current state of the science of innate and adaptive immunity in aging and longevity. From the modern point of view, innate and adaptive immunity are not only affected by aging but also are important parts of its underlying mechanisms. Excessive levels or activity of antimicrobial peptides, C-reactive protein, complement system, TLR/NF-κB, cGAS/STING/IFN 1,3 and AGEs/RAGE pathways, myeloid cells and NLRP3 inflammasome, declined levels of NK cells in innate immunity, thymus involution and decreased amount of naive T-cells in adaptive immunity, are biomarkers of aging and predisposition factors for cellular senescence and aging-related pathologies. Long-living species, human centenarians, and women are characterized by less inflamm-aging and decelerated immunosenescence. Despite recent progress in understanding, the harmonious theory of immunosenescence is still developing. Geroprotectors targeting these mechanisms are just emerging and are comprehensively discussed in this article.
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Affiliation(s)
- Alexey Moskalev
- Institute of Biology of FRC of Komi Scientific Center of Ural Branch of Russian Academy of Sciences, Syktyvkar, 167982, Russia.
| | - Ilia Stambler
- Vetek (Seniority), The Movement for Longevity and Quality of Life, Israel.
| | - Calogero Caruso
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Palermo, Italy
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380
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Marino GE, Weeraratna AT. A glitch in the matrix: Age-dependent changes in the extracellular matrix facilitate common sites of metastasis. AGING AND CANCER 2020; 1:19-29. [PMID: 35694033 PMCID: PMC9187055 DOI: 10.1002/aac2.12013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 09/07/2020] [Indexed: 12/15/2022]
Abstract
People over 55 years old represent the majority of cancer patients and suffer from increased metastatic burden compared to the younger patient population. As the aging population increases globally, it is prudent to understand how the intrinsic aging process contributes to cancer progression. As we age, we incur aberrant changes in the extracellular matrix (ECM) of our organs, which contribute to numerous pathologies, including cancer. Notably, the lung, liver, and bone represent the most common sites of distal metastasis for all cancer types. In this review, we describe how age-dependent changes in the ECM of these organs influence cancer progression. Further, we outline how these alterations prime the premetastatic niche and why these may help explain the disparity in outcome for older cancer patients.
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Affiliation(s)
- Gloria E. Marino
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
- Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Ashani T. Weeraratna
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
- Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins School of Medicine, Baltimore, Maryland
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381
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Kataria S, Tandon M, Melnic V, Sriwastava S. A case series and literature review of multiple sclerosis and COVID-19: Clinical characteristics, outcomes and a brief review of immunotherapies. eNeurologicalSci 2020; 21:100287. [PMID: 33163634 PMCID: PMC7605741 DOI: 10.1016/j.ensci.2020.100287] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 10/04/2020] [Accepted: 10/27/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND In view of the emerging coronavirus pandemic, the demand for knowledge about the impact of SARS-CoV-2 on people with Multiple Sclerosis (MS) continues to grow. Patients receiving disease modifying therapy (DMT) for MS have a higher background risk of infection-related health care utilization when compared to the general population. Therefore, there is a need of evidence-based recommendations to reduce the risk of infection and also managing MS patients with SARS-CoV-2. CASE DESCRIPTION We present three patients with history of Multiple Sclerosis (MS) on DMTs presenting with worsening MS symptoms likely pseudo exacerbation who were diagnosed with COVID-19. DISCUSSION An extensive review of 7 articles was performed, in addition to a brief review on DMTs use in MS patients with COVID-19. In our cases, all patients were on DMT and severe course of disease was noted in 2 cases. No fatality was observed. CONCLUSIONS This review provides a base on the clinical characteristics, outcomes and the roles of DMTs in MS patients suffering from n-cov-2. Physicians need to be vigilant about considering COVID-19 infection related relapse in the MS patients, especially in this COVID-19 pandemic era and look for pseudo-exacerbation. As most cases are found to have mild course and full recovery on DMTs, further research is needed to formulate evidence-based guidelines. This review will particularly be helpful for the researchers and registries to collect future data on MS and COVID-19.
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Key Words
- ALT, Alanine Transaminase
- AST, Aspartate Transaminase
- ATS/IDSA, American Thoracic Society and Infectious Disease Society of America
- Antigen presenting cells, (APCs)
- BUN, Blood Urea Nitrogen
- COVID-19
- COVID-19, Coronavirus Disease 2019
- CRP, C-Reactive Protein
- CSF, Cerebrospinal fluid
- CT, Computed Tomography
- DMT, Disease Modifying Therapy
- EDSS, Expanded Disability Status Score
- IV, Intravenous
- Immunotherapies
- JCV, John Cunnigham virus
- L, Liters
- MS, Multiple Sclerosis
- Multiple sclerosis
- NK cells, Natural Killer Cells
- Novel coronavirus
- Ocrelizumab
- PPMS, Primary Progressive Multiple Sclerosis
- Progressive multifocal leukoencephalopathy, (PML).
- RRMS, Relapsing Remitting Multiple Sclerosis
- RT PCR, Reverse Transcription Polymerase Chain Reaction
- SARS-CoV-2
- SARS-CoV-2, Severe Acute Respiratory Syndrome Coronavirus 2
- Terminally differentiated late effector memory T cells, (TEMRA)
- n-Cov2, Novel coronavirus 2
- ul, Microliters
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Affiliation(s)
- Saurabh Kataria
- Department of Neurology, University of Missouri Healthcare at Columbia, MO
| | | | - Violina Melnic
- Department of Neurology, West Virginia University School of Medicine, Morgantown, WV, United States of America
| | - Shitiz Sriwastava
- Department of Neurology, West Virginia University School of Medicine, Morgantown, WV, United States of America
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382
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Kelley WJ, Zemans RL, Goldstein DR. Cellular senescence: friend or foe to respiratory viral infections? Eur Respir J 2020; 56:2002708. [PMID: 33033152 PMCID: PMC7758538 DOI: 10.1183/13993003.02708-2020] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/30/2020] [Indexed: 01/26/2023]
Abstract
Cellular senescence permanently arrests the replication of various cell types and contributes to age-associated diseases. In particular, cellular senescence may enhance chronic lung diseases including COPD and idiopathic pulmonary fibrosis. However, the role cellular senescence plays in the pathophysiology of acute inflammatory diseases, especially viral infections, is less well understood. There is evidence that cellular senescence prevents viral replication by increasing antiviral cytokines, but other evidence shows that senescence may enhance viral replication by downregulating antiviral signalling. Furthermore, cellular senescence leads to the secretion of inflammatory mediators, which may either promote host defence or exacerbate immune pathology during viral infections. In this Perspective article, we summarise how senescence contributes to physiology and disease, the role of senescence in chronic lung diseases, and how senescence impacts acute respiratory viral infections. Finally, we develop a potential framework for how senescence may contribute, both positively and negatively, to the pathophysiology of viral respiratory infections, including severe acute respiratory syndrome due to the coronavirus SARS-CoV-2.
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Affiliation(s)
- William J Kelley
- Dept of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- Program in Immunology, University of Michigan, Ann Arbor, MI, USA
- Dept of Microbiology and Immunology, University of Michigan, Ann Arbor, MI USA
| | - Rachel L Zemans
- Dept of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- Program in Immunology, University of Michigan, Ann Arbor, MI, USA
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, USA
| | - Daniel R Goldstein
- Dept of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- Program in Immunology, University of Michigan, Ann Arbor, MI, USA
- Dept of Microbiology and Immunology, University of Michigan, Ann Arbor, MI USA
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383
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Clark BL, Thomas PG. A Cell for the Ages: Human γδ T Cells across the Lifespan. Int J Mol Sci 2020; 21:E8903. [PMID: 33255339 PMCID: PMC7727649 DOI: 10.3390/ijms21238903] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/18/2020] [Accepted: 11/23/2020] [Indexed: 12/19/2022] Open
Abstract
The complexity of the human immune system is exacerbated by age-related changes to immune cell functionality. Many of these age-related effects remain undescribed or driven by mechanisms that are poorly understood. γδ T cells, while considered an adaptive subset based on immunological ontogeny, retain both innate-like and adaptive-like characteristics. This T cell population is small but mighty, and has been implicated in both homeostatic and disease-induced immunity within tissues and throughout the periphery. In this review, we outline what is known about the effect of age on human peripheral γδ T cells, and call attention to areas of the field where further research is needed.
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Affiliation(s)
- Brandi L. Clark
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA;
- Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Paul G. Thomas
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA;
- Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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384
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Hariyanto TI, Putri C, Arisa J, Situmeang RFV, Kurniawan A. Dementia and outcomes from coronavirus disease 2019 (COVID-19) pneumonia: A systematic review and meta-analysis. Arch Gerontol Geriatr 2020; 93:104299. [PMID: 33285424 PMCID: PMC7674980 DOI: 10.1016/j.archger.2020.104299] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/14/2020] [Accepted: 11/17/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND The number of positive and death cases from coronavirus disease 2019 (COVID-19) is still increasing until now. One of the most prone individuals, even in normal situations is patients with dementia. Currently, no study provides clear evidence regarding the link between dementia and COVID-19. This study aims to analyze the relationship between dementia and poor outcomes of COVID-19 infection. MATERIALS AND METHODS We systematically searched the PubMed and Europe PMC database using specific keywords related to our aims until October 25th, 2020. All articles published on COVID-19 and dementia were retrieved. The quality of the study was assessed using the Newcastle Ottawa Scale (NOS) tool for observational studies. Statistical analysis was done using Review Manager 5.4 software. RESULTS A total of 24 studies with 46,391 dementia patients were included in this meta-analysis. This meta-analysis showed that dementia was associated with composite poor outcome [RR 2.67 (95% CI 2.06 - 3.47), p < 0.00001, I2 = 99%, random-effect modeling] and its subgroup which comprised of risk of COVID-19 infection [RR 2.76 (95% CI 1.43 - 5.33), p = 0.003, I2 = 99%, random-effect modeling], severe COVID-19 [RR 2.63 (95% CI 1.41 - 4.90), p = 0.002, I2 = 89%, random-effect modeling], and mortality from COVID-19 infection [RR 2.62 (95% CI 2.04 - 3.36), p < 0.00001, I2 = 96%, random-effect modeling]. CONCLUSIONS Extra care and close monitoring should then be provided to patients with dementia to minimize the risk of infections, preventing the development of severe and mortality outcomes.
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Affiliation(s)
- Timotius Ivan Hariyanto
- Faculty of Medicine, Pelita Harapan University, Boulevard Jendral Sudirman street, Karawaci, Tangerang, Indonesia 15811
| | - Cynthia Putri
- Faculty of Medicine, Pelita Harapan University, Boulevard Jendral Sudirman street, Karawaci, Tangerang, Indonesia 15811
| | - Jessie Arisa
- Faculty of Medicine, Pelita Harapan University, Boulevard Jendral Sudirman street, Karawaci, Tangerang, Indonesia 15811
| | - Rocksy Fransisca V Situmeang
- Memory clinic, Department of Neurology, Siloam Hospitals Lippo Village, Boulevard Jendral Sudirman street, Karawaci, Tangerang, Indonesia 15811
| | - Andree Kurniawan
- Department of Internal Medicine, Faculty of Medicine, Pelita Harapan University, Boulevard Jendral Sudirman street, Karawaci, Tangerang, Indonesia 15811.
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385
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Batista MA, Calvo-Fortes F, Silveira-Nunes G, Camatta GC, Speziali E, Turroni S, Teixeira-Carvalho A, Martins-Filho OA, Neretti N, Maioli TU, Santos RR, Brigidi P, Franceschi C, Faria AMC. Inflammaging in Endemic Areas for Infectious Diseases. Front Immunol 2020; 11:579972. [PMID: 33262758 PMCID: PMC7688519 DOI: 10.3389/fimmu.2020.579972] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 10/13/2020] [Indexed: 12/20/2022] Open
Abstract
Immunosenescence is marked by a systemic process named inflammaging along with a series of defects in the immunological activity that results in poor responses to infectious agents and to vaccination. Inflammaging, a state of low-grade chronic inflammation, usually leads to chronic inflammatory diseases and frailty in the elderly. However, some elderly escape from frailty and reach advanced age free of the consequences of inflammaging. This process has been called immunological remodeling, and it is the hallmark of healthy aging as described in the studies of centenarians in Italy. The biological markers of healthy aging are still a matter of debate, and the studies on the topic have focused on inflammatory versus remodeling processes and molecules. The sub-clinical inflammatory status associated with aging might be a deleterious event for populations living in countries where chronic infectious diseases are not prevalent. Nevertheless, in other parts of the world where they are, two possibilities may occur. Inflammatory responses may have a protective effect against these infectious agents. At the same time, the long-term consequences of protective immune responses during chronic infections may result in accelerated immunosenescence in these individuals. Therefore, the biological markers of healthy aging can vary according to environmental, cultural, and geographical settings that reflect worldwide, and in a non-biased, non-westernized perspective, the changes that we experience regarding our contacts with microorganisms and the outcomes of such contacts.
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Affiliation(s)
- Marina Andrade Batista
- Programa de Pós Graduação em Nutrição e Saúde, Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fernanda Calvo-Fortes
- Programa de Pós Graduação em Nutrição e Saúde, Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Gabriela Silveira-Nunes
- Departamento de Medicina, Universidade Federal de Juiz de Fora, Governador Valadares, Brazil
| | - Giovanna Caliman Camatta
- Programa de Pós Graduação em Nutrição e Saúde, Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Elaine Speziali
- Instituto Rene Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Silvia Turroni
- Unit of Microbial Ecology of Health, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | | | | | - Nicola Neretti
- Departament of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, United States
| | - Tatiani Uceli Maioli
- Programa de Pós Graduação em Nutrição e Saúde, Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rodrigo Ribeiro Santos
- Departamento de Clínica Médica, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Patrizia Brigidi
- Unit of Microbial Ecology of Health, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Claudio Franceschi
- Center for Biophysics, Bioinformatics, Biocomplexity, University of Bologna, Bologna, Italy.,Laboratory of Systems Biology of Healthy Aging, Department of Applied Mathematics, Lobachevsky University, Nizhny Novgorod, Russia
| | - Ana Maria Caetano Faria
- Programa de Pós Graduação em Nutrição e Saúde, Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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386
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Venosa A. Senescence in Pulmonary Fibrosis: Between Aging and Exposure. Front Med (Lausanne) 2020; 7:606462. [PMID: 33282895 PMCID: PMC7689159 DOI: 10.3389/fmed.2020.606462] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 10/23/2020] [Indexed: 12/15/2022] Open
Abstract
To date, chronic pulmonary pathologies represent the third leading cause of death in the elderly population. Evidence-based projections suggest that >65 (years old) individuals will account for approximately a quarter of the world population before the turn of the century. Genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, and altered intercellular communication, are described as the nine “hallmarks” that govern cellular fitness. Any deviation from the normal pattern initiates a complex cascade of events culminating to a disease state. This blueprint, originally employed to describe aberrant changes in cancer cells, can be also used to describe aging and fibrosis. Pulmonary fibrosis (PF) is the result of a progressive decline in injury resolution processes stemming from endogenous (physiological decline or somatic mutations) or exogenous stress. Environmental, dietary or occupational exposure accelerates the pathogenesis of a senescent phenotype based on (1) window of exposure; (2) dose, duration, recurrence; and (3) cells type being targeted. As the lung ages, the threshold to generate an irreversibly senescent phenotype is lowered. However, we do not have sufficient knowledge to make accurate predictions. In this review, we provide an assessment of the literature that interrogates lung epithelial, mesenchymal, and immune senescence at the intersection of aging, environmental exposure and pulmonary fibrosis.
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Affiliation(s)
- Alessandro Venosa
- Department of Pharmacology and Toxicology, University of Utah College of Pharmacy, Salt Lake City, UT, United States
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387
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Sex as a confounding factor in the effects of ageing on rat lymph node t cell compartment. Exp Gerontol 2020; 142:111140. [PMID: 33129930 DOI: 10.1016/j.exger.2020.111140] [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] [Received: 05/15/2020] [Revised: 10/22/2020] [Accepted: 10/23/2020] [Indexed: 01/20/2023]
Abstract
The study examined the influence of sex on the alterations occurring with ageing in rat lymph node (LN) T cell compartment. In female and male rats the decrease in LN T cell counts was followed by a shift in CD4+/CD8+ T cell ratio towards CD8+ T cells, which was more prominent in males than in females. With ageing, in both major LN T cell subpopulations naïve (recent thymic emigrants and mature naïve cells) to memory/activated T cell ratio shifted to the side of memory/activated cells in female, and particularly in male rats. The frequency of regulatory CD25+Foxp3+ cells increased among LN CD4+/CD8+ T cells with ageing, reflecting, at least partly, an enhanced conversion of effector T cells into regulatory cells. This was also more prominent in male rats. The more prounounced increase in LN oxidative damage and the expression levels of proinflammatory cytokines in male rats with ageing, most likely contributed to the greater frequency of proinflammatory, replicatively senescent CD28- cells expressing CD11b (innate cell marker), among T cells of old male rats compared with age-matched females. The increase in LN oxidation/proinflammatory state with ageing was also consistent with the accumulation of exhausted PD-1high cells among T lymphocytes, particularly prominent among CD8+ T cells from male rats. Finally, by calculating a summary score for the key ageing-relevant parameters (an ageing index), a faster development of the deleterious changes in the T cell compartment occurring with ageing was confirmed in male rat LNs. Additionally, the study pointed to indices of LN T cell compartment ageing which correlate with those in peripheral blood.
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388
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Sharma R, Padwad Y. Nutraceuticals-Based Immunotherapeutic Concepts and Opportunities for the Mitigation of Cellular Senescence and Aging: A Narrative Review. Ageing Res Rev 2020; 63:101141. [PMID: 32810647 DOI: 10.1016/j.arr.2020.101141] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/29/2020] [Accepted: 08/07/2020] [Indexed: 02/06/2023]
Abstract
The role of increased tissue senescent cell (SC) burden in driving the process of ageing and associated disorders is rapidly gaining attention. Amongst various plausible factors, impairment in immune functions is emerging as a critical regulator of known age-associated accumulation of SC. Immune cells dysfunctions with age are multi-faceted and are uniquely attributed to the independent processes of immunosenescence and cellular senescence which may collectively impair immune system mediated clearance of SC. Moreover, being functionally and phenotypically heterogenic, immune cells are also liable to be affected by senescence microenvironment in other tissues. Therefore, strategies aimed at improving immunosenescence and cellular senescence in immune cells can have pleiotropic effects on ageing physiology including the accumulation of SC. In this regard, nutraceutical's immunomodulatory attributes are well documented which may have implications in developing nutrition-oriented immunotherapeutic approaches against SC. In particular, the three diverse sources of bioactive ingredients, viz., phytochemicals, probiotic bacteria and omega-3-fatty acids have shown promising anti-immunosenescence and anti-cellular senescence potential in immune cells influencing aging and immunity in ways beyond modest stimulation of immune responses. The present narrative review describes the preventive and therapeutic attributes of phytochemicals such as polyphenols, probiotic microbes and omega-3-fatty acids in influencing the emerging nexus of immunosenescence, cellular senescence and SC during aging. Outstanding questions and nutraceuticals-based pro-longevity and niche research areas have been deliberated. Further research using integrative approaches is recommended for developing nutrition-based holistic immunotherapeutic strategies for 'healthy ageing'.
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389
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Chadwick JW, Tenenbaum HC, Sun CX, Wood RE, Glogauer M. The effect of pamidronate delivery in bisphosphonate-naïve patients on neutrophil chemotaxis and oxidative burst. Sci Rep 2020; 10:18309. [PMID: 33110111 PMCID: PMC7591900 DOI: 10.1038/s41598-020-75272-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 09/07/2020] [Indexed: 11/24/2022] Open
Abstract
The pathogenesis of medication-related osteonecrosis of the jaw (MRONJ), a morbid condition associated with bisphosphonate administration, has not been fully elucidated. Recent research utilizing a murine model has revealed that the neutrophil becomes dysfunctional following exposure to bisphosphonates. Accordingly, the impairment of neutrophil function could play an important role in the pathogenesis of MRONJ via an infectious mechanism mediated by the suppression of the innate immune system. Currently, the existing human data are insufficient to substantiate this theory. To investigate, we isolated neutrophils from blood and oral rinse samples from bisphosphonate-naïve patients who were recently diagnosed with multiple myeloma both prior to and one month following their initial infusion of pamidronate, an intravenous bisphosphonate agent. Stimulated blood and oral neutrophil superoxide production and chemotactic capabilities were found to be impaired relative to baseline values. These results suggest that impaired neutrophil function may partially contribute to the aetiology underlying the pathophysiological processes linked to the development of MRONJ. Further, as the functional status of circulating neutrophils was reflected in the oral cavity where sampling can be accomplished in a non-invasive fashion, it is conceivable that neutrophil function could serve as a potential biomarker for MRONJ prognostication.
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Affiliation(s)
- Jeffrey W Chadwick
- Department of Dental Oncology and Maxillofacial Prosthetics, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Toronto, ON, M5G 2M9, Canada.
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON, M5G1G6, Canada.
| | - Howard C Tenenbaum
- Department of Dental Oncology and Maxillofacial Prosthetics, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Toronto, ON, M5G 2M9, Canada
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON, M5G1G6, Canada
- Department of Dentistry, Centre for Advanced Dental Research and Care, Mount Sinai Hospital, 600 University Avenue, Toronto, ON, M5G 1X5, Canada
| | - Chun-Xiang Sun
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON, M5G1G6, Canada
| | - Robert E Wood
- Department of Dental Oncology and Maxillofacial Prosthetics, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Toronto, ON, M5G 2M9, Canada
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON, M5G1G6, Canada
| | - Michael Glogauer
- Department of Dental Oncology and Maxillofacial Prosthetics, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Toronto, ON, M5G 2M9, Canada
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON, M5G1G6, Canada
- Department of Dentistry, Centre for Advanced Dental Research and Care, Mount Sinai Hospital, 600 University Avenue, Toronto, ON, M5G 1X5, Canada
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390
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Pietrobon AJ, Teixeira FME, Sato MN. I mmunosenescence and Inflammaging: Risk Factors of Severe COVID-19 in Older People. Front Immunol 2020; 11:579220. [PMID: 33193377 PMCID: PMC7656138 DOI: 10.3389/fimmu.2020.579220] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 09/29/2020] [Indexed: 01/08/2023] Open
Abstract
Old individuals are more susceptible to various infections due to immunological changes that occur during the aging process. These changes named collectively as "immunosenescence" include decreases in both the innate and adaptive immune responses in addition to the exacerbated production of inflammatory cytokines. This scenario of immunological dysfunction and its relationship with disease development in older people has been widely studied, especially in infections that can be fatal, such as influenza and, more recently, COVID-19. In the current scenario of SARS-CoV-2 infection, many mechanisms of disease pathogenesis in old individuals have been proposed. To better understand the dynamics of COVID-19 in this group, aspects related to immunological senescence must be well elucidated. In this article, we discuss the main mechanisms involved in immunosenescence and their possible correlations with the susceptibility of individuals of advanced age to SARS-CoV-2 infection and the more severe conditions of the disease.
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Affiliation(s)
- Anna Julia Pietrobon
- Laboratory of Dermatology and Immunodeficiencies, LIM-56, Department of Dermatology, Tropical Medicine Institute of São Paulo, University of São Paulo Medical School, São Paulo, Brazil
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Franciane Mouradian Emidio Teixeira
- Laboratory of Dermatology and Immunodeficiencies, LIM-56, Department of Dermatology, Tropical Medicine Institute of São Paulo, University of São Paulo Medical School, São Paulo, Brazil
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Maria Notomi Sato
- Laboratory of Dermatology and Immunodeficiencies, LIM-56, Department of Dermatology, Tropical Medicine Institute of São Paulo, University of São Paulo Medical School, São Paulo, Brazil
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391
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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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392
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Fulop T, Larbi A, Hirokawa K, Cohen AA, Witkowski JM. Immunosenescence is both functional/adaptive and dysfunctional/maladaptive. Semin Immunopathol 2020; 42:521-536. [PMID: 32930852 PMCID: PMC7490574 DOI: 10.1007/s00281-020-00818-9] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/24/2020] [Indexed: 01/08/2023]
Abstract
Alterations in the immune system with aging are considered to underlie many age-related diseases. However, many elderly individuals remain healthy until even a very advanced age. There is also an increase in numbers of centenarians and their apparent fitness. We should therefore change our unilaterally detrimental consideration of age-related immune changes. Recent data taking into consideration the immunobiography concept may allow for meaningful distinctions among various aging trajectories. This implies that the aging immune system has a homeodynamic characteristic balanced between adaptive and maladaptive aspects. The survival and health of an individual depends from the equilibrium of this balance. In this article, we highlight which parts of the aging of the immune system may be considered adaptive in contrast to those that may be maladaptive.
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Affiliation(s)
- T Fulop
- Department of Geriatrics, Faculty of Medicine, Research Center on Aging, University of Sherbrooke, Sherbrooke, QC, J1K 2R1, Canada.
- Research Center on Aging, Faculty of Medicine and Health Sciences, University of Sherbrooke, 3001, 12th Avenue North, Sherbrooke, Quebec, J1H 5N4, Canada.
| | - A Larbi
- Biology of Aging Program and Immunomonitoring Platform, Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Biopolis, Singapore, 138648, Singapore
| | - K Hirokawa
- Institute of Health and Life Science, Tokyo and Nito-memory Nakanosogo Hospital, Department of Pathology, Tokyo Med. Dent. University, Tokyo, Japan
| | - A A Cohen
- Department of Family Medicine, Faculty of Medicine, Research Center on Aging, University of Sherbrooke, Sherbrooke, QC, J1K 2R1, Canada
| | - J M Witkowski
- Department of Pathophysiology, Medical University of Gdansk, Gdansk, Poland
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393
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Hove-Skovsgaard M, Zhao Y, Tingstedt JL, Hartling HJ, Thudium RF, Benfield T, Afzal S, Nordestgaard B, Ullum H, Gerstoft J, Mocroft A, Nielsen SD. Impact of Age and HIV Status on Immune Activation, Senescence and Apoptosis. Front Immunol 2020; 11:583569. [PMID: 33117394 PMCID: PMC7561401 DOI: 10.3389/fimmu.2020.583569] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/02/2020] [Indexed: 12/11/2022] Open
Abstract
Introduction Residual immune dysfunctions, resembling those that occur during normal aging, may persist even in well-treated people with HIV (PWH), and accelerated aging has been proposed. We aimed to determine if HIV infection is an independent risk factor for T-cell immune dysfunctions including increased immune activation, senescence and apoptosis. Moreover, in PWH we aimed to identify the associations between age and immune activation, senescence and apoptosis. Materials and Methods We included 780 PWH with suppressed viral replication (<50 copies/mL) and absence of hepatitis B and hepatitis C co-infection and 65 uninfected controls from the Copenhagen Co-morbidity in HIV Infection (COCOMO) Study. Flow cytometry was used to determine T-cell activation (CD38+HLA-DR+), senescence (CD28-CD57+), and apoptosis (CD28-CD95+). T-cell subsets are reported as proportions of CD4+ and CD8+ T-cells. We defined an elevated proportion of a given T-cell subset as above the 75th percentile. Regression models were used to determine the association between HIV status and T-cell subset and in PWH to determine the association between age or HIV-specific risk factors and T-cell subsets. Furthermore, an interaction between HIV status and age on T-cell subsets was investigated with an interaction term in models including both PWH and controls. Models were adjusted for age, sex, BMI, and smoking status. Results In adjusted models a positive HIV status was associated with elevated proportions of CD8+ activated (p = 0.009), CD4+ senescent (p = 0.004), CD4+ apoptotic (p = 0.002), and CD8+ apoptotic (p = 0.003) T-cells. In PWH a 10-year increase in age was associated with higher proportions of CD4+ and CD8+ senescent (p = 0.001 and p < 0.001) and CD4+ and CD8+ apoptotic T-cells (p < 0.001 and p < 0.001). However, no interaction between HIV status and age was found. Furthermore, in PWH a CD4+/CD8+ ratio < 1 was associated with elevated proportions of T-cell activation, senescence, and apoptosis. Discussion We found evidence of residual T-cell immune dysfunction in well-treated PWH without HBV or HCV co-infection, and age was associated with T-cell senescence and apoptosis. Our data supports that HIV infection has similar effects as aging on T-cell subsets. However, since no interaction between HIV status and age was found on these parameters, we found no evidence to support accelerated immunological aging in PWH.
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Affiliation(s)
- Malene Hove-Skovsgaard
- Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Yanan Zhao
- Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | | | - Hans Jakob Hartling
- Department of Clinical Immunology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Rebekka Faber Thudium
- Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Benfield
- Department of Infectious Diseases, Hvidovre Hospital, Copenhagen University Hospital, Amager and Hvidovre, Hvidovre, Denmark.,Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Shoaib Afzal
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.,The Copenhagen General Population Study, Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
| | - Børge Nordestgaard
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.,The Copenhagen General Population Study, Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
| | - Henrik Ullum
- Department of Clinical Immunology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Jan Gerstoft
- Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Amanda Mocroft
- Centre for Clinical Research, Epidemiology, Modelling and Evaluation (CREME), Institute for Global Health, UCL, London, United Kingdom
| | - Susanne Dam Nielsen
- Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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394
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Brisse M, Vrba SM, Kirk N, Liang Y, Ly H. Emerging Concepts and Technologies in Vaccine Development. Front Immunol 2020; 11:583077. [PMID: 33101309 PMCID: PMC7554600 DOI: 10.3389/fimmu.2020.583077] [Citation(s) in RCA: 143] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/14/2020] [Indexed: 01/05/2023] Open
Abstract
Despite the success of vaccination to greatly mitigate or eliminate threat of diseases caused by pathogens, there are still known diseases and emerging pathogens for which the development of successful vaccines against them is inherently difficult. In addition, vaccine development for people with compromised immunity and other pre-existing medical conditions has remained a major challenge. Besides the traditional inactivated or live attenuated, virus-vectored and subunit vaccines, emerging non-viral vaccine technologies, such as viral-like particle and nanoparticle vaccines, DNA/RNA vaccines, and rational vaccine design, offer innovative approaches to address existing challenges of vaccine development. They have also significantly advanced our understanding of vaccine immunology and can guide future vaccine development for many diseases, including rapidly emerging infectious diseases, such as COVID-19, and diseases that have not traditionally been addressed by vaccination, such as cancers and substance abuse. This review provides an integrative discussion of new non-viral vaccine development technologies and their use to address the most fundamental and ongoing challenges of vaccine development.
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Affiliation(s)
- Morgan Brisse
- Biochemistry, Molecular Biology, and Biophysics Graduate Program, University of Minnesota Twin Cities, St. Paul, MN, United States
- Department of Veterinary & Biomedical Sciences, University of Minnesota Twin Cities, St. Paul, MN, United States
| | - Sophia M. Vrba
- Department of Veterinary & Biomedical Sciences, University of Minnesota Twin Cities, St. Paul, MN, United States
| | - Natalie Kirk
- Department of Veterinary & Biomedical Sciences, University of Minnesota Twin Cities, St. Paul, MN, United States
- Comparative Molecular Biosciences Graduate Program, University of Minnesota Twin Cities, St. Paul, MN, United States
| | - Yuying Liang
- Department of Veterinary & Biomedical Sciences, University of Minnesota Twin Cities, St. Paul, MN, United States
| | - Hinh Ly
- Department of Veterinary & Biomedical Sciences, University of Minnesota Twin Cities, St. Paul, MN, United States
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395
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Bordallo B, Bellas M, Cortez AF, Vieira M, Pinheiro M. Severe COVID-19: what have we learned with the immunopathogenesis? Adv Rheumatol 2020; 60:50. [PMID: 32962761 PMCID: PMC7506814 DOI: 10.1186/s42358-020-00151-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 09/07/2020] [Indexed: 01/08/2023] Open
Abstract
The COVID-19 outbreak caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has become a global major concern. In this review, we addressed a theoretical model on immunopathogenesis associated with severe COVID-19, based on the current literature of SARS-CoV-2 and other epidemic pathogenic coronaviruses, such as SARS and MERS. Several studies have suggested that immune dysregulation and hyperinflammatory response induced by SARS-CoV-2 are more involved in disease severity than the virus itself.Immune dysregulation due to COVID-19 is characterized by delayed and impaired interferon response, lymphocyte exhaustion and cytokine storm that ultimately lead to diffuse lung tissue damage and posterior thrombotic phenomena.Considering there is a lack of clinical evidence provided by randomized clinical trials, the knowledge about SARS-CoV-2 disease pathogenesis and immune response is a cornerstone to develop rationale-based clinical therapeutic strategies. In this narrative review, the authors aimed to describe the immunopathogenesis of severe forms of COVID-19.
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Affiliation(s)
- Bruno Bordallo
- Departament of Internal Medicine / Emergence, Hospital Universitário Antônio Pedro / Univesidade Federal Fluminense, Niterói, RJ, Brazil.
| | - Mozart Bellas
- Departament of Internal Medicine / Emergence, Hospital Universitário Antônio Pedro / Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Arthur Fernandes Cortez
- Hospital Universitário Gaffré e Guinle / Universidade Federal do Estado do Rio de Janeiro, Internal Medicine Departament, Rio de Janeiro, RJ, Brazil
| | - Matheus Vieira
- Departament of Internal Medicine, Hospital Universitário Clementino Fraga Filho, Rio de Janeiro, RJ, Brazil
| | - Marcelo Pinheiro
- Departament of Rheumatology, Universidade Federal de São Paulo, Sao Paulo, SP, Brazil
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396
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The conundrum of human immune system "senescence". Mech Ageing Dev 2020; 192:111357. [PMID: 32949594 PMCID: PMC7494491 DOI: 10.1016/j.mad.2020.111357] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/01/2020] [Accepted: 09/08/2020] [Indexed: 12/15/2022]
Abstract
Biomarkers of human immunosenescence are discussed. Longitudinal studies are essential. Associations of immune markers in older adults with clinical outcome are context-dependent. There are no universal biomarkers of human immunosenescence. There are common age-associated changes to peripheral immune markers in humans.
There is a great deal of debate on the question of whether or not we know what ageing is (Ref. Cohen et al., 2020). Here, we consider what we believe to be the especially confused and confusing case of the ageing of the human immune system, commonly referred to as “immunosenescence”. But what exactly is meant by this term? It has been used loosely in the literature, resulting in a certain degree of confusion as to its definition and implications. Here, we argue that only those differences in immune parameters between younger and older adults that are associated in some definitive manner with detrimental health outcomes and/or impaired survival prospects should be classed as indicators of immunosenescence in the strictest sense of the word, and that in humans we know remarkably little about their identity. Such biomarkers of immunosenescence may nonetheless indicate beneficial effects in other contexts, consistent with the notion of antagonistic pleiotropy. Identifying what could be true immunosenescence in this respect requires examining: (1) what appears to correlate with age, though generality across human populations is not yet confirmed; (2) what clearly is part of a suite of canonical changes in the immune system that happen with age; (3) which subset of those changes accelerates rather than slows aging; and (4) all changes, potentially population-specific, that accelerate agig. This remains an immense challenge. These questions acquire an added urgency in the current SARS-CoV-2 pandemic, given the clearly greater susceptibility of older adults to COVID-19.
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397
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Biological Properties of a Citral-Enriched Fraction of Citrus limon Essential Oil. Foods 2020; 9:foods9091290. [PMID: 32937843 PMCID: PMC7555671 DOI: 10.3390/foods9091290] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 12/27/2022] Open
Abstract
Lemon essential oil (LEO) is a well-known flavoring agent with versatile biological activities. In the present study, we have isolated and characterized four citral-enriched fractions of winter LEO. We reported that in murine and human macrophages the pre-treatment with a mix of these fractions (Cfr-LEO) reduces the expression of the pro-inflammatory cytokines TNF-α, IL-1β, and IL-6 induced by LPS. In addition, Cfr-LEO counteracts LPS-induced oxidative stress, as shown by the increase in the GSH/GSSG ratio in comparison to cells treated with LPS alone. Overall, the results reported here encourage the application of EO fractions, enriched in citral, in the nutraceutical industry, not only for its organoleptic properties but also for its protective action against inflammation and oxidative stress.
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398
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van Eeden C, Khan L, Osman MS, Cohen Tervaert JW. Natural Killer Cell Dysfunction and Its Role in COVID-19. Int J Mol Sci 2020; 21:E6351. [PMID: 32883007 PMCID: PMC7503862 DOI: 10.3390/ijms21176351] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/27/2020] [Accepted: 08/27/2020] [Indexed: 12/15/2022] Open
Abstract
When facing an acute viral infection, our immune systems need to function with finite precision to enable the elimination of the pathogen, whilst protecting our bodies from immune-related damage. In many instances however this "perfect balance" is not achieved, factors such as ageing, cancer, autoimmunity and cardiovascular disease all skew the immune response which is then further distorted by viral infection. In SARS-CoV-2, although the vast majority of COVID-19 cases are mild, as of 24 August 2020, over 800,000 people have died, many from the severe inflammatory cytokine release resulting in extreme clinical manifestations such as acute respiratory distress syndrome (ARDS) and hemophagocytic lymphohistiocytosis (HLH). Severe complications are more common in elderly patients and patients with cardiovascular diseases. Natural killer (NK) cells play a critical role in modulating the immune response and in both of these patient groups, NK cell effector functions are blunted. Preliminary studies in COVID-19 patients with severe disease suggests a reduction in NK cell number and function, resulting in decreased clearance of infected and activated cells, and unchecked elevation of tissue-damaging inflammation markers. SARS-CoV-2 infection skews the immune response towards an overwhelmingly inflammatory phenotype. Restoration of NK cell effector functions has the potential to correct the delicate immune balance required to effectively overcome SARS-CoV-2 infection.
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Affiliation(s)
| | | | | | - Jan Willem Cohen Tervaert
- Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G 2R3, Canada; (C.v.E.); (L.K.); (M.S.O.)
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399
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Blasco-Lafarga C, Cordellat A, Forte A, Roldán A, Monteagudo P. Short and Long-Term Trainability in Older Adults: Training and Detraining Following Two Years of Multicomponent Cognitive-Physical Exercise Training. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17165984. [PMID: 32824709 PMCID: PMC7460235 DOI: 10.3390/ijerph17165984] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 12/21/2022]
Abstract
Despite the benefits of multicomponent physical–cognitive training programs (MCCogTPs), lower training intensities in the concurrent approach, and bigger heterogeneity with aging, suggest the need for long-term analyses, with special attention to training and detraining in older adults. The present study aims to examine these training/detraining effects in a two year MCCogTP, looking for specific dynamics in the trainability of their physical and cognitive capacities. The intervention was divided into four periods: T1, T2 (8 months of training each), and D1, D2 (3.5 months of detraining plus 0.5 of testing each). Twenty-five healthy seniors (70.82 ± 5.18 years) comprised the final sample and were assessed for cardiovascular fitness (6-minutes walking test), lower-limbs strength (30-seconds chair-stand test) and agility (8-feet timed up-and-go test). Inhibition (Stroop test) was considered for executive function. Physical and cognitive status improved significantly (p < 0.05) throughout the two years, with larger enhancements for physical function (mainly strength and agility). Strength and cardiovascular fitness were more sensitive to detraining, whilst agility proved to have larger training retentions. Inhibition followed an initial similar trend, but it was the only variable to improve along D2 (d = 0.52), and changes were not significant within periods. Notwithstanding aging, and the exercise cessation in D2, physical and cognitive status remained enhanced two years later compared to baseline, except for lower-limb strength. According to these results, basic physical capacities are very sensitive to training/detraining, deserving continuous attention (especially strength). Both reducing detraining periods and complementary resistance training should be considered. Additionally, physical enhancements following MCcogTPs may help cognition maintenance during detraining.
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Affiliation(s)
- Cristina Blasco-Lafarga
- Physical Education and Sports Department, University of Valencia, 46010 Valencia, Spain; (C.B.-L.); (A.R.)
- Sport Performance & Physical Fitness Research Group (UIRFIDE), University of Valencia, 46010 Valencia, Spain;
| | - Ana Cordellat
- Physical Education and Sports Department, University of Valencia, 46010 Valencia, Spain; (C.B.-L.); (A.R.)
- Sport Performance & Physical Fitness Research Group (UIRFIDE), University of Valencia, 46010 Valencia, Spain;
- Correspondence:
| | - Anabel Forte
- Statistics and Operational Research Department, University of Valencia, 46100 Burjassot, Valencia, Spain;
| | - Ainoa Roldán
- Physical Education and Sports Department, University of Valencia, 46010 Valencia, Spain; (C.B.-L.); (A.R.)
- Sport Performance & Physical Fitness Research Group (UIRFIDE), University of Valencia, 46010 Valencia, Spain;
| | - Pablo Monteagudo
- Sport Performance & Physical Fitness Research Group (UIRFIDE), University of Valencia, 46010 Valencia, Spain;
- Education and Specific Didactics Department, Jaume I University, 12071 Castellon, Spain
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400
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Cunha LL, Perazzio SF, Azzi J, Cravedi P, Riella LV. Remodeling of the Immune Response With Aging: Immunosenescence and Its Potential Impact on COVID-19 Immune Response. Front Immunol 2020; 11:1748. [PMID: 32849623 PMCID: PMC7427491 DOI: 10.3389/fimmu.2020.01748] [Citation(s) in RCA: 146] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/30/2020] [Indexed: 12/14/2022] Open
Abstract
Elderly individuals are the most susceptible to an aggressive form of coronavirus disease (COVID-19), caused by SARS-CoV-2. The remodeling of immune response that is observed among the elderly could explain, at least in part, the age gradient in lethality of COVID-19. In this review, we will discuss the phenomenon of immunosenescence, which entails changes that occur in both innate and adaptive immunity with aging. Furthermore, we will discuss inflamm-aging, a low-grade inflammatory state triggered by continuous antigenic stimulation, which may ultimately increase all-cause mortality. In general, the elderly are less capable of responding to neo-antigens, because of lower naïve T cell frequency. Furthermore, they have an expansion of memory T cells with a shrinkage of the T cell diversity repertoire. When infected by SARS-CoV-2, young people present with a milder disease as they frequently clear the virus through an efficient adaptive immune response. Indeed, antibody-secreting cells and follicular helper T cells are thought to be effectively activated in young patients that present a favorable prognosis. In contrast, the elderly are more prone to an uncontrolled activation of innate immune response that leads to cytokine release syndrome and tissue damage. The failure to trigger an effective adaptive immune response in combination with a higher pro-inflammatory tonus may explain why the elderly do not appropriately control viral replication and the potential clinical consequences triggered by a cytokine storm, endothelial injury, and disseminated organ injury. Enhancing the efficacy of the adaptive immune response may be an important issue both for infection resolution as well as for the appropriate generation of immunity upon vaccination, while inhibiting inflamm-aging will likely emerge as a potential complementary therapeutic approach in the management of patients with severe COVID-19.
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Affiliation(s)
- Lucas Leite Cunha
- Department of Medicine, Escola Paulista de Medicina, Federal University of São Paulo, São Paulo, Brazil
| | - Sandro Felix Perazzio
- Division of Rheumatology, Escola Paulista de Medicina, Federal University of São Paulo, São Paulo, Brazil
| | - Jamil Azzi
- Schuster Transplantation Research Center, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Paolo Cravedi
- Renal Division, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Leonardo Vidal Riella
- Division of Nephrology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, United States
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