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Zeng J, Lin Z, Tang J, Chen X, Huang K, Gan F. The role of JAK2/STAT3 pathway in non-cytotoxic concentrations of DON-induced aggravation of inflammatory response in IL-10 deficient RAW264.7 cells. Food Chem Toxicol 2024; 186:114557. [PMID: 38432439 DOI: 10.1016/j.fct.2024.114557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 02/23/2024] [Accepted: 02/29/2024] [Indexed: 03/05/2024]
Abstract
Deoxynivalenol (DON) as a mycotoxin was commonly found in food and cereals which can affect immune function and inflammatory response. The majority of foods contain DON at levels below the official limit. This study aimed to evaluate the effects of non-cytotoxic concentration of DON on inflammation and its mechanisms using the IL-10 gene-silenced RAW264.7 cell model. The results showed that a non-cytotoxic concentration of DON at 25 ng/ml aggravated IL-10 knockdown-induced inflammation, which was manifested by increasing IL-1β and TNF-α mRNA expression, migration and phagocytosis, decreasing IL-10 mRNA expression, and enhancing JAK2/STAT3 phosphorylation. Adding JAK2 inhibitor AG490 attenuated the aggravating effect of DON on IL-10 knockdown-induced inflammation. In conclusion, a non-cytotoxic concentration of DON enhances the inflammatory response through the JAK2/STAT3 signaling pathway when inflammation occurs in the body. These results indicated that non-cytotoxic concentrations of DON could aggravate inflammation when inflammation was induced by IL-10 knockdown, which increases vigilance against DON contamination at low concentration especially when an animal's body has inflammation.
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Affiliation(s)
- Junya Zeng
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Ziman Lin
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Jiangyu Tang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Xingxiang Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Fang Gan
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China.
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Pan Y, Ma L. Inflammatory markers and physical frailty: towards clinical application. Immun Ageing 2024; 21:4. [PMID: 38184585 PMCID: PMC10770917 DOI: 10.1186/s12979-023-00410-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 12/27/2023] [Indexed: 01/08/2024]
Abstract
Global population aging poses a tremendous burden on the health care system worldwide. Frailty is associated with decreased physical reserve and is considered an important indicator of adverse events in the older population. Therefore, there is growing interest in the early diagnosis and intervention of frailty, but the cellular mechanisms responsible for frailty are still not completely understood. Chronic inflammation is related to decreased physical function and increased disease risk. Additionally, multiple human and animal studies suggest that inflammation probably plays the largest role in contributing to frailty. Some inflammatory markers have been proposed to predict physical frailty. However, there are still large gaps in knowledge related to the clinical application of these markers in frail patients. Therefore, understanding the biological processes and identifying recognized and reliable markers are urgent and pivotal tasks for geriatricians. In the present review, we broadly summarize the inflammatory markers that may have potential diagnostic and therapeutic use, thereby translating them into health care for older people with frailty in the near future.
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Affiliation(s)
- Yiming Pan
- Department of Geriatrics, Xuanwu Hospital Capital Medical University, National Research Center for Geriatric Medicine, Beijing, 100053, China
| | - Lina Ma
- Department of Geriatrics, Xuanwu Hospital Capital Medical University, National Research Center for Geriatric Medicine, Beijing, 100053, China.
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Li X, Ma L. From biological aging to functional decline: Insights into chronic inflammation and intrinsic capacity. Ageing Res Rev 2024; 93:102175. [PMID: 38145874 DOI: 10.1016/j.arr.2023.102175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 12/06/2023] [Accepted: 12/19/2023] [Indexed: 12/27/2023]
Abstract
Intrinsic capacity is the sum of an individual's physical and mental capacities, which helps determine functional ability. Intrinsic capacity decline is an important predictor of adverse health outcomes and can identify individuals at higher risk of functional decline. Aging is characterized by a decrease in physiological reserves and functional abilities. Chronic inflammation, a mechanism of aging, is associated with decreased intrinsic capacity, which may mirror the broader relationship between aging and functional ability. Therefore, it is crucial for maintaining functional ability and promoting healthy aging to study the mechanisms of intrinsic capacity decline, identify easily available markers, and make targets for intervention from the perspective of chronic inflammation. We reviewed the current research on chronic inflammation, inflammation-related markers, and intrinsic capacity. To date, there is still no inflammatory markers with high specificity and sensitivity to monitor intrinsic capacity decline. Interleukin-6, C-reactive protein, and tumor necrosis factor-alpha may potentially indicate changes in intrinsic capacity, but their results with intrinsic capacity or each intrinsic capacity domain are inconsistent. Considering the variations in individual responses to changes in inflammatory markers, it may be beneficial to explore the use of multiple analytes instead of relying on a single marker. This approach could be valuable in monitoring the decline of intrinsic capacity in the future.
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Affiliation(s)
- Xiaxia Li
- Department of Geriatrics, Xuanwu Hospital, Capital Medical University, National Clinical Research Center for Geriatric Disorders, Beijing, China
| | - Lina Ma
- Department of Geriatrics, Xuanwu Hospital, Capital Medical University, National Clinical Research Center for Geriatric Disorders, Beijing, China.
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4
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Elzamzami FD, Samal A, Arun AS, Dharmaraj T, Prasad NR, Rendon-Jonguitud A, DeVine L, Walston JD, Cole RN, Wilson KL. Native lamin A/C proteomes and novel partners from heart and skeletal muscle in a mouse chronic inflammation model of human frailty. Front Cell Dev Biol 2023; 11:1240285. [PMID: 37936983 PMCID: PMC10626543 DOI: 10.3389/fcell.2023.1240285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 10/05/2023] [Indexed: 11/09/2023] Open
Abstract
Clinical frailty affects ∼10% of people over age 65 and is studied in a chronically inflamed (Interleukin-10 knockout; "IL10-KO") mouse model. Frailty phenotypes overlap the spectrum of diseases ("laminopathies") caused by mutations in LMNA. LMNA encodes nuclear intermediate filament proteins lamin A and lamin C ("lamin A/C"), important for tissue-specific signaling, metabolism and chromatin regulation. We hypothesized that wildtype lamin A/C associations with tissue-specific partners are perturbed by chronic inflammation, potentially contributing to dysfunction in frailty. To test this idea we immunoprecipitated native lamin A/C and associated proteins from skeletal muscle, hearts and brains of old (21-22 months) IL10-KO versus control C57Bl/6 female mice, and labeled with Tandem Mass Tags for identification and quantitation by mass spectrometry. We identified 502 candidate lamin-binding proteins from skeletal muscle, and 340 from heart, including 62 proteins identified in both tissues. Candidates included frailty phenotype-relevant proteins Perm1 and Fam210a, and nuclear membrane protein Tmem38a, required for muscle-specific genome organization. These and most other candidates were unaffected by IL10-KO, but still important as potential lamin A/C-binding proteins in native heart or muscle. A subset of candidates (21 in skeletal muscle, 30 in heart) showed significantly different lamin A/C-association in an IL10-KO tissue (p < 0.05), including AldoA and Gins3 affected in heart, and Lmcd1 and Fabp4 affected in skeletal muscle. To screen for binding, eleven candidates plus prelamin A and emerin controls were arrayed as synthetic 20-mer peptides (7-residue stagger) and incubated with recombinant purified lamin A "tail" residues 385-646 under relatively stringent conditions. We detected strong lamin A binding to peptides solvent exposed in Lmcd1, AldoA, Perm1, and Tmem38a, and plausible binding to Csrp3 (muscle LIM protein). These results validated both proteomes as sources for native lamin A/C-binding proteins in heart and muscle, identified four candidate genes for Emery-Dreifuss muscular dystrophy (CSRP3, LMCD1, ALDOA, and PERM1), support a lamin A-interactive molecular role for Tmem38A, and supported the hypothesis that lamin A/C interactions with at least two partners (AldoA in heart, transcription factor Lmcd1 in muscle) are altered in the IL10-KO model of frailty.
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Affiliation(s)
- Fatima D. Elzamzami
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Arushi Samal
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Adith S. Arun
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Tejas Dharmaraj
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Neeti R. Prasad
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Alex Rendon-Jonguitud
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Lauren DeVine
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Jeremy D. Walston
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Robert N. Cole
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Katherine L. Wilson
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
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5
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Nidadavolu LS, Cosarderelioglu C, Merino Gomez A, Wu Y, Bopp T, Zhang C, Nguyen T, Marx-Rattner R, Yang H, Antonescu C, Florea L, Talbot CC, Smith B, Foster DB, Fairman JE, Yenokyan G, Chung T, Le A, Walston JD, Abadir PM. Interleukin-6 Drives Mitochondrial Dysregulation and Accelerates Physical Decline: Insights From an Inducible Humanized IL-6 Knock-In Mouse Model. J Gerontol A Biol Sci Med Sci 2023; 78:1740-1752. [PMID: 37310873 PMCID: PMC10562892 DOI: 10.1093/gerona/glad147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Indexed: 06/15/2023] Open
Abstract
Chronic activation of inflammatory pathways (CI) and mitochondrial dysfunction are independently linked to age-related functional decline and early mortality. Interleukin 6 (IL-6) is among the most consistently elevated chronic activation of inflammatory pathways markers, but whether IL-6 plays a causative role in this mitochondrial dysfunction and physical deterioration remains unclear. To characterize the role of IL-6 in age-related mitochondrial dysregulation and physical decline, we have developed an inducible human IL-6 (hIL-6) knock-in mouse (TetO-hIL-6mitoQC) that also contains a mitochondrial-quality control reporter. Six weeks of hIL-6 induction resulted in upregulation of proinflammatory markers, cell proliferation and metabolic pathways, and dysregulated energy utilization. Decreased grip strength, increased falls off the treadmill, and increased frailty index were also observed. Further characterization of skeletal muscles postinduction revealed an increase in mitophagy, downregulation of mitochondrial biogenesis genes, and an overall decrease in total mitochondrial numbers. This study highlights the contribution of IL-6 to mitochondrial dysregulation and supports a causal role of hIL-6 in physical decline and frailty.
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Affiliation(s)
- Lolita S Nidadavolu
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Caglar Cosarderelioglu
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Alessandra Merino Gomez
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Yuqiong Wu
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Taylor Bopp
- Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Cissy Zhang
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Tu Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ruth Marx-Rattner
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Huanle Yang
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Corina Antonescu
- Department of Genetic Medicine, John Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Liliana Florea
- Department of Genetic Medicine, John Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Conover C Talbot
- Institute for Basic Biomedical Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Barbara Smith
- Department of Cell Biology, Imaging Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - D Brian Foster
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Jennifer E Fairman
- Division of Cellular and Molecular Medicine, Department of Art as Applied to Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Gayane Yenokyan
- Johns Hopkins Biostatistics Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Tae Chung
- Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anne Le
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeremy D Walston
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Peter M Abadir
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Cosarderelioglu C, Kreimer S, Plaza‐Rodriguez AI, Iglesias PA, Talbot CC, Siragy HM, Carey RM, Ubaida‐Mohien C, O'Rourke B, Ferrucci L, Bennett DA, Walston J, Abadir P. Decoding Angiotensin Receptors: TOMAHAQ-Based Detection and Quantification of Angiotensin Type-1 and Type-2 Receptors. J Am Heart Assoc 2023; 12:e030791. [PMID: 37681524 PMCID: PMC10547273 DOI: 10.1161/jaha.123.030791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/20/2023] [Indexed: 09/09/2023]
Abstract
Background The renin-angiotensin system plays a crucial role in human physiology, and its main hormone, angiotensin, activates 2 G-protein-coupled receptors, the angiotensin type-1 and type-2 receptors, in almost every organ. However, controversy exists about the location, distribution, and expression levels of these receptors. Concerns have been raised over the low sensitivity, low specificity, and large variability between lots of commercially available antibodies for angiotensin type-1 and type-2 receptors, which makes it difficult to reconciliate results of different studies. Here, we describe the first non-antibody-based sensitive and specific targeted quantitative mass spectrometry assay for angiotensin receptors. Methods and Results Using a technique that allows targeted analysis of multiple peptides across multiple samples in a single mass spectrometry analysis, known as TOMAHAQ (triggered by offset, multiplexed, accurate mass, high resolution, and absolute quantification), we have identified and validated specific human tryptic peptides that permit identification and quantification of angiotensin type-1 and type-2 receptors in biological samples. Several peptide sequences are conserved in rodents, making these mass spectrometry assays amenable to both preclinical and clinical studies. We have used this method to quantify angiotensin type-1 and type-2 receptors in postmortem frontal cortex samples of older adults (n=28) with Alzheimer dementia. We correlated levels of angiotensin receptors to biomarkers classically linked to renin-angiotensin system activation, including oxidative stress, inflammation, amyloid-β load, and paired helical filament-tau tangle burden. Conclusions These robust high-throughput assays will not only catalyze novel mechanistic studies in the angiotensin research field but may also help to identify patients with an unbalanced angiotensin receptor distribution who would benefit from angiotensin receptor blocker treatment.
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Affiliation(s)
- Caglar Cosarderelioglu
- Division of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMD
- Division of Geriatrics, Department of Internal MedicineAnkara University School of MedicineAnkaraTurkey
| | - Simion Kreimer
- The Mass Spectrometry and Proteomics FacilityJohns Hopkins University School of MedicineBaltimoreMD
| | | | - Pablo A. Iglesias
- Department of Electrical and Computer Engineering, Whiting School of EngineeringJohns Hopkins UniversityBaltimoreMD
| | - C. Conover Talbot
- Institute for Basic Biomedical Sciences, Johns Hopkins University School of MedicineBaltimoreMD
| | - Helmy M. Siragy
- Division of Endocrinology and Metabolism, Department of MedicineUniversity of VirginiaCharlottesvilleVA
| | - Robert M. Carey
- Division of Endocrinology and Metabolism, Department of MedicineUniversity of VirginiaCharlottesvilleVA
| | | | - Brian O'Rourke
- Division of Cardiology, Department of MedicineJohns Hopkins UniversityBaltimoreMD
| | - Luigi Ferrucci
- National Institute on Aging, National Institutes of HealthBaltimoreMD
| | - David A. Bennett
- Rush Alzheimer’s Disease CenterRush University Medical CenterChicagoIL
| | - Jeremy Walston
- Division of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMD
| | - Peter Abadir
- Division of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMD
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7
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Murdaca G, Paladin F, Casciaro M, Vicario CM, Gangemi S, Martino G. Neuro-Inflammaging and Psychopathological Distress. Biomedicines 2022; 10:biomedicines10092133. [PMID: 36140234 PMCID: PMC9495653 DOI: 10.3390/biomedicines10092133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/24/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Inflammaging is a low degree of chronic and systemic tissue inflammation associated with aging, and is intimately linked to pro-inflammatory mediators. These substances are involved in the pathogenesis of chronic inflammatory diseases and related psychopathological symptoms. When inflammation and aging affect the brain, we use the term neuro-inflammaging. In this review, we focused on the neuro-inflammatory process typical of advanced ages and the related psychopathological symptoms, with particular attention to understanding the immune-pathogenetic mechanisms involved and the potential use of immunomodulatory drugs in the control of clinical psychological signs. Inflammation and CNS were demonstrated being intimately linked in the neuro-inflammatory loop. IL-1, IL-6, TNF-a, COX and PGE are only partially responsible. BBB permeability and the consequent oxidative stress resulting from tissue damage make the rest. Some authors elaborated the “theory of cytokine-induced depression”. Inflammation has a crucial role in the onset symptoms of psychopathological diseases as it is capable of altering the metabolism of biogenic monoamines involved in their pathogenesis. In recent years, NSAIDs as an adjunct therapy in the treatment of relevant psychopathological disorders associated with chronic inflammatory conditions demonstrated their efficacy. Additionally, novel molecules have been studied, such as adalimumab, infliximab, and etanercept showing antidepressant and anxiolytic promising results. However, we are only at the beginning of a new era characterized by the use of biological drugs for the treatment of inflammatory and autoimmune diseases, and this paper aims to stimulate future studies in such a direction.
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Affiliation(s)
- Giuseppe Murdaca
- Department of Internal Medicine, University of Genoa, 16132 Genoa, Italy
- Ospedale Policlinico San Martino IRCCS, 16132 Genoa, Italy
- Correspondence:
| | - Francesca Paladin
- Department of Internal Medicine, University of Genoa, 16132 Genoa, Italy
- Ospedale Policlinico San Martino IRCCS, 16132 Genoa, Italy
| | - Marco Casciaro
- Department of Biomedical and Dental Science and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy
| | | | - Sebastiano Gangemi
- Allergy and Clinical Immunology Unit, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy
| | - Gabriella Martino
- Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy
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8
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Heinze-Milne SD, Banga S, Howlett SE. Frailty and cytokines in preclinical models: Comparisons with humans. Mech Ageing Dev 2022; 206:111706. [PMID: 35835224 DOI: 10.1016/j.mad.2022.111706] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/22/2022] [Accepted: 07/08/2022] [Indexed: 11/27/2022]
Abstract
Chronic low-grade elevations of blood-borne cytokines/chemokines in older age tend to associate with frailty in humans. This persistent inflammation is often called "inflammageing" and likely contributes to frailty progression. Preclinical models such as ageing and/or genetically modified mice offer a unique opportunity to mechanistically study how these inflammatory mediators affect frailty. In this review, we summarize and contrast evidence relating cytokines/chemokines to frailty in humans and in mouse models of frailty. In humans and mice, higher levels of the pro-inflammatory cytokine interleukin-6 regularly increased in proportion to the degree of frailty. Evidence linking other cytokines/chemokines to frailty in humans and mice is less certain. The chemokines CXCL-10 and monocyte chemoattractant protein-1 related to frailty across both species, but evidence is limited and inconsistent. Several other cytokines/chemokines, including tumour necrosis factor-α relate to frailty in humans or in mice, but evidence to date is species- and tissue-dependent. It is important for future studies to validate common mechanistic inflammatory biomarkers of frailty between humans and mice. Achieving this goal will accelerate the search for drugs to treat frailty.
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Affiliation(s)
| | - Shubham Banga
- Department of Pharmacology, Dalhousie University, Halifax, NS, Canada.
| | - Susan E Howlett
- Department of Pharmacology, Dalhousie University, Halifax, NS, Canada; Department of Medicine (Geriatric Medicine), Dalhousie University, Halifax, NS, Canada.
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9
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Frailty in rodents: Models, underlying mechanisms, and management. Ageing Res Rev 2022; 79:101659. [PMID: 35660004 DOI: 10.1016/j.arr.2022.101659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/24/2022] [Accepted: 05/30/2022] [Indexed: 11/22/2022]
Abstract
Frailty is a clinical geriatric syndrome characterized by decreased multisystem function and increased vulnerability to adverse outcomes. Although numerous studies have been conducted on frailty, the underlying mechanisms and management strategies remain unclear. As rodents share homology with humans, they are used extensively as animal models to study human diseases. Rodent frailty models can be classified broadly into the genetic modification and non-genetic modification models, the latter of which include frailty assessment models (based on the Fried frailty phenotype and frailty index methods) and induced frailty models. Such models were developed for use in investigating frailty-related physiological changes at the gene, cellular, molecular, and system levels, including the organ system level. Furthermore, exercise, diet, and medication interventions, in addition to their combinations, could improve frailty status in rodents. Rodent frailty models provide novel and effective tools for frailty research. In the present paper, we review research progress in rodent frailty models, mechanisms, and management, which could facilitate and guide further clinical research on frailty in older adults.
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10
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Perazza LR, Brown-Borg HM, Thompson LV. Physiological Systems in Promoting Frailty. Compr Physiol 2022; 12:3575-3620. [PMID: 35578945 DOI: 10.1002/cphy.c210034] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Frailty is a complex syndrome affecting a growing sector of the global population as medical developments have advanced human mortality rates across the world. Our current understanding of frailty is derived from studies conducted in the laboratory as well as the clinic, which have generated largely phenotypic information. Far fewer studies have uncovered biological underpinnings driving the onset and progression of frailty, but the stage is set to advance the field with preclinical and clinical assessment tools, multiomics approaches together with physiological and biochemical methodologies. In this article, we provide comprehensive coverage of topics regarding frailty assessment, preclinical models, interventions, and challenges as well as clinical frameworks and prevalence. We also identify central biological mechanisms that may be at play including mitochondrial dysfunction, epigenetic alterations, and oxidative stress that in turn, affect metabolism, stress responses, and endocrine and neuromuscular systems. We review the role of metabolic syndrome, insulin resistance and visceral obesity, focusing on glucose homeostasis, adenosine monophosphate-activated protein kinase (AMPK), mammalian target of rapamycin (mTOR), and nicotinamide adenine dinucleotide (NAD+ ) as critical players influencing the age-related loss of health. We further focus on how immunometabolic dysfunction associates with oxidative stress in promoting sarcopenia, a key contributor to slowness, weakness, and fatigue. We explore the biological mechanisms involved in stem cell exhaustion that affect regeneration and may contribute to the frailty-associated decline in resilience and adaptation to stress. Together, an overview of the interplay of aging biology with genetic, lifestyle, and environmental factors that contribute to frailty, as well as potential therapeutic targets to lower risk and slow the progression of ongoing disease is covered. © 2022 American Physiological Society. Compr Physiol 12:1-46, 2022.
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Affiliation(s)
- Laís R Perazza
- Department of Physical Therapy and Athletic Training, Boston University, Boston, Massachusetts, USA
| | - Holly M Brown-Borg
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA
| | - LaDora V Thompson
- Department of Physical Therapy and Athletic Training, Boston University, Boston, Massachusetts, USA
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11
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Rovina RL, Pinto AP, Muñoz VR, da Rocha AL, Rebelo MA, Teixeira GR, Tavares MEA, Pauli JR, de Moura LP, Cintra DE, Ropelle ER, da Silva ASR. Genetic deletion of IL-6 increases CK-MB, a classic cardiac damage marker, and decreases UPRmt genes after exhaustive exercise. Cell Biochem Funct 2022; 40:369-378. [PMID: 35411956 DOI: 10.1002/cbf.3701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 03/25/2022] [Accepted: 03/30/2022] [Indexed: 11/10/2022]
Abstract
The intensity, duration, type of contraction, and muscle damage influence interleukin-6 (IL-6) response to acute exercise. However, in response to an exhaustive exercise session, the upregulation of IL-6 in the serum and heart is associated with an inflammatory condition and can inhibit autophagy. This study aimed to investigate the role of IL-6 in autophagy pathway responses and mitochondrial function in the heart of mice submitted to acute exhaustive physical exercise. The mice were allocated into three groups, five animals per group, for the wild type (WT) and the IL-6 knockout (IL-6 KO): Basal (sedentary; Basal), 1 h (after 1 h of the acute exercise; 1 h), and 3 h (after 3 h of the acute exercise; 3 h). After the specific time for each group, the blood was collected, each mouse heart was removed, and the left ventricle (LV) was isolated. In summary, under basal conditions, without the influence of the acute exercise, the IL-6 KO group showed lower number of nuclei in the cardiac tissue, but higher collagen deposition; lower messenger RNA (mRNA) levels of Prkaa1 and Mtco1, but higher mRNA levels of Ulk1; and higher protein levels of the ratio p-AMPK/AMPK in the heart when compared to WT at the same time point. After the acute exercise (1 and 3 h), the IL-6 KO group had lower mRNA levels of Tfam, Mtnd1, Mtco1, and Nampt in the heart when compared to WT after exercise; higher serum levels of creatine kinase (CK), CK-MB, and lactate dehydrogenase for the IL-6 group when compared to the WT group after the exercise. Specifically, the heat-shock protein 60 protein levels in the heart increased 3 h after exhaustive exercise in the WT group, but not in the IL-6 KO group. The study emphasizes that IL-6 may offer cardioprotective effects, including mitochondrial adaptations in response to acute exhaustive exercise.
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Affiliation(s)
- Rafael L Rovina
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Ana P Pinto
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Vitor R Muñoz
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Alisson L da Rocha
- Postgraduate Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Macario A Rebelo
- Department of Pharmacology, Faculty of Medicinal Sciences, State University of Campinas (UNICAMP), University of Campinas, Campinas, São Paulo, Brazil
| | - Giovana R Teixeira
- Multicentric Program of Postgraduate in Physiological Sciences, School of Dentistry of Araçatuba, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil.,Department of Physical Education, State University of São Paulo (UNESP), Presidente Prudente, São Paulo, Brazil
| | - Maria Eduarda A Tavares
- Multicentric Program of Postgraduate in Physiological Sciences, School of Dentistry of Araçatuba, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - José R Pauli
- Laboratory of Molecular Biology of Exercise (LaBMEx), School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Leandro P de Moura
- Laboratory of Molecular Biology of Exercise (LaBMEx), School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Dennys E Cintra
- Laboratory of Molecular Biology of Exercise (LaBMEx), School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Eduardo R Ropelle
- Laboratory of Molecular Biology of Exercise (LaBMEx), School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Adelino S R da Silva
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil.,Postgraduate Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
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12
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Nidadavolu LS, Stern D, Lin R, Wang Y, Li Y, Wu Y, Marin S, Antonio MJ, Yenokyan G, Boronina T, Cole R, Foster DB, Talbot C, Jedrych J, Smith B, Rini D, Le A, Cui H, Walston JD, Abadir PM. Valsartan nano-filaments alter mitochondrial energetics and promote faster healing in diabetic rat wounds. Wound Repair Regen 2021; 29:927-937. [PMID: 34669222 PMCID: PMC8571056 DOI: 10.1111/wrr.12974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 09/20/2021] [Accepted: 09/22/2021] [Indexed: 12/31/2022]
Abstract
Chronic wounds are a common and debilitating condition associated with aging populations that impact more than 6.5 million patients in the United States. We have previously demonstrated the efficacy of daily topical 1% valsartan in treating wounds in diabetic mouse and pig models. Despite these promising results, there remains a need to develop an extended-release formulation that would reduce patient burden by decreasing the frequency of daily applications. Here, we used nanotechnology to self-assemble valsartan amphiphiles into a filamentous structure (val-filaments) that would serve as a scaffold in wound beds and allow for steady, localised and tunable release of valsartan amphiphiles over 24 days. Two topical treatments of this peptide-based hydrogel on full-thickness wounds in Zucker Diabetic Fatty rats resulted in faster rates of wound closure. By day 23, all val-filament treated wounds were completely closed, as compared to one wound closed in the placebo group. Mechanistically, we observed enrichment of proteins involved in cell adhesion and energetics pathways, downregulation of Tgf-β signalling pathway mediators (pSmad2, pSmad3 and Smad4) and increased mitochondrial metabolic pathway intermediates. This study demonstrates the successful synthesis of a sustained-release valsartan filament hydrogel, its impact on mitochondrial energetics and efficacy in treating diabetic wounds.
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Affiliation(s)
- Lolita S. Nidadavolu
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21224, USA
| | - David Stern
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21228, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21228, USA
| | - Ran Lin
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21228, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21228, USA
| | - Yuzhu Wang
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21228, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21228, USA
| | - Yi Li
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21228, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21228, USA
| | - Yuqiong Wu
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21224, USA
| | - Sela Marin
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21224, USA
| | - Marjorie J. Antonio
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Gayane Yenokyan
- Johns Hopkins Biostatistics Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA
| | - Tatiana Boronina
- Mass Spectrometry and Proteomics Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Robert Cole
- Mass Spectrometry and Proteomics Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - D. Brian Foster
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, MD
| | - Conover Talbot
- Institute for Basic Biomedical Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Jaroslaw Jedrych
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Barbara Smith
- Cell Biology Imaging Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - David Rini
- Department of Art as Applied to Medicine, Division of Cellular and Molecular Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Anne Le
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Honggang Cui
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21228, USA
| | - Jeremy D. Walston
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21224, USA
| | - Peter M. Abadir
- Division of Geriatrics and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21224, USA
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13
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Bloomer SA, Moyer ED. Hepatic macrophage accumulation with aging: cause for concern? Am J Physiol Gastrointest Liver Physiol 2021; 320:G496-G505. [PMID: 33470190 DOI: 10.1152/ajpgi.00286.2020] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Aging is associated with chronic, low-grade inflammation that adversely affects physiological function. The liver regulates systemic inflammation; it is a source of cytokine production and also scavenges bacteria from the portal circulation to prevent infection of other organs. The cells with primary roles in these functions, hepatic macrophages, become more numerous in the liver with "normal" aging (i.e., in the absence of disease). Here, we demonstrate evidence and potential mechanisms for this phenomenon, which include augmented tumor necrosis factor-α (TNF-α) and intercellular adhesion molecule-1 (ICAM-1) expression in the liver. Also, we discuss how an age-related impairment in autophagy within macrophages leads to a pro-oxidative state and ensuing production of proinflammatory cytokines, particularly interleukin 6 (IL-6). Given that the liver is a rich source of macrophages, we posit that it represents a major source of the elevated systemic IL-6 observed with aging, which is associated with physiological dysfunction. Testing a causal role for liver macrophage production of IL-6 during aging remains a challenge, yet interventions that have targeted macrophages and/or IL-6 have demonstrated promise in treating age-related diseases. These studies have demonstrated an age-related, deleterious reprogramming of macrophage function, which worsens pathology. Therefore, hepatic macrophage accrual is indeed a cause for concern, and therapies that attenuate the aged phenotype of macrophages will likely prove useful in promoting healthy aging.
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Affiliation(s)
- Steven A Bloomer
- Division of Science and Engineering, Penn State Abington, Abington, Pennsylvania
| | - Eric D Moyer
- Penn State College of Medicine, Hershey, Pennsylvania
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14
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Fried LP, Cohen AA, Xue QL, Walston J, Bandeen-Roche K, Varadhan R. The physical frailty syndrome as a transition from homeostatic symphony to cacophony. NATURE AGING 2021; 1:36-46. [PMID: 34476409 PMCID: PMC8409463 DOI: 10.1038/s43587-020-00017-z] [Citation(s) in RCA: 205] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 12/07/2020] [Indexed: 12/14/2022]
Abstract
Frailty in aging marks a state of decreased reserves resulting in increased vulnerability to adverse outcomes when exposed to stressors. This Perspective synthesizes the evidence on the aging-related pathophysiology underpinning the clinical presentation of physical frailty as a phenotype of a clinical syndrome that is distinct from the cumulative-deficit-based frailty index. We focus on integrating the converging evidence on the conceptualization of physical frailty as a state, largely independent of chronic diseases, that emerges when the dysregulation of multiple interconnected physiological and biological systems crosses a threshold to critical dysfunction, severely compromising homeostasis. Our exegesis posits that the physiology underlying frailty is a critically dysregulated complex dynamical system. This conceptual framework implies that interventions such as physical activity that have multisystem effects are more promising to remedy frailty than interventions targeted at replenishing single systems. We then consider how this framework can drive future research to further understanding, prevention and treatment of frailty, which will likely preserve health and resilience in aging populations.
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Affiliation(s)
- Linda P. Fried
- Columbia University Mailman School of Public Health, New York, NY, USA
| | - Alan A. Cohen
- Groupe de recherche PRIMUS, Department of Family Medicine, Université de Sherbrooke, Quebec City, Quebec, Canada
| | - Qian-Li Xue
- Johns Hopkins Center on Aging and Health, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jeremy Walston
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Karen Bandeen-Roche
- Johns Hopkins Center on Aging and Health, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
- These authors jointly supervised this work: Karen Bandeen-Roche, Ravi Varadhan
| | - Ravi Varadhan
- Division of Biostatistics and Bioinformatics, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD, USA
- These authors jointly supervised this work: Karen Bandeen-Roche, Ravi Varadhan
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15
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Ge N, Westbrook R, Langdon J, Yang H, Marx R, Abadir P, Xue QL, Walston JD. Plasma levels of corticosterone, tumor necrosis factor receptor 1 and interleukin 6 are influenced by age, sex and chronic inflammation in mice treated with acute temperature stress. Exp Gerontol 2020; 142:111136. [PMID: 33164891 DOI: 10.1016/j.exger.2020.111136] [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: 06/24/2020] [Revised: 10/01/2020] [Accepted: 10/21/2020] [Indexed: 02/05/2023]
Abstract
Resiliency is the ability to respond to, adapt to and recover from stressors. Deterioration of resiliency in older adults has been hypothesized to be regulated by age-related changes in stress response systems, including the Hypothalamic Pituitary Adrenal (HPA) axis and the innate immune system response. Although age-related chronic inflammation is strongly related to lack of resiliency, the impact of chronic inflammation on acute stress response is unclear. Here we describe the impact of a five-hour exposure to cold temperature acute stressor, on immune and corticosterone response using older and younger IL-10tm/tm mice, a mouse model with chronic inflammatory pathway activation, and age and gender matched C57/Bl6 background control (WT) mice. Overall, mice exposed to 4 °C for 5 h had significantly higher plasma corticosterone levels compared to those that remained at room temperature (25 °C), with the exception of the WT females. Cold stressed mice had lower plasma tumor necrosis factor receptor 1 (TNFR1) levels with varying significance, in all ages and phenotypes, with the exception of the old female WT mice. In contrast, the effects of cold stress on pro-inflammatory cytokine interleukin 6 (IL-6) levels were inconsistent and not significant, with the exception of the female IL-10tm/tm mice. In conclusion, these findings demonstrate that sex, age and chronic inflammatory pathway activation all influence corticosterone secretion and inflammatory processes in the face of acute cold stress.
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Affiliation(s)
- Ning Ge
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA; The Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Reyhan Westbrook
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Jacqueline Langdon
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Huanle Yang
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Ruth Marx
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Peter Abadir
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Qian-Li Xue
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Jeremy D Walston
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA.
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16
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Palermo S. Covid-19 Pandemic: Maximizing Future Vaccination Treatments Considering Aging and Frailty. Front Med (Lausanne) 2020; 7:558835. [PMID: 33072783 PMCID: PMC7530612 DOI: 10.3389/fmed.2020.558835] [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: 05/18/2020] [Accepted: 09/02/2020] [Indexed: 12/15/2022] Open
Abstract
The COVID-19 pandemic is proving to be a multiplier of inequalities. Especially toward the elderly population. A voiceless scream that comes from geriatrics, nursing homes, hospices from all over Italy. They call it the silent massacre: from North to South, the bulletin of coronavirus positive—or already deceased—elderly people continues to grow exponentially without a chance to counter it. Population aging and chronicity are a question that needs to be addressed. Frailty is the most challenging expression of population aging, with major consequences for public health and clinical practice. It is a geriatric syndrome which consists in a state of higher vulnerability to stressors attributed to a lower homeostatic reserve due to an age-related multisystem physiological change. People over 60, and especially over 80, are particularly vulnerable to severe or fatal infection. Moreover, the age-related dysregulation of the immune system in the elderly (i.e., immunosenescence and inflammaging) results in poorer responses to vaccination. Physical frailty is an effective health indicator and it has previously shown to predict the response to the seasonal flu vaccine. These findings suggest that assessing frailty in the elderly may identify those who are less likely to respond to immunization and be at higher risk for COVID-19 and its complications. Moreover, cognitive frailty and neurocognitive disorders, mental health and reduced awareness of illness negatively impact on adherence to complex medication regimens among elderly patients. A worldwide research and development blueprint have been initiated to accelerate the development of vaccines and therapeutics for the COVID-19 outbreak. Considered the above, I suggest the importance to consider aging in thinking about future Civud-19 vaccination and treatment, focusing on the possible impact of physical and cognitive frailty.
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Affiliation(s)
- Sara Palermo
- Department of Psychology, University of Turin, Turin, Italy.,European Innovation Partnership on Active and Healthy Aging, Bruxelles, Belgium
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17
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Omics biomarkers for frailty in older adults. Clin Chim Acta 2020; 510:363-372. [PMID: 32745578 DOI: 10.1016/j.cca.2020.07.057] [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: 06/09/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 12/14/2022]
Abstract
Frailty is a clinical state characterized by an age-related unsteady state of the body, a decline in physiological function, and an increased vulnerability to adverse outcomes. Early diagnosis of frailty is important for improving the quality of life in older adults and promoting healthy aging. The biological mechanisms underlying frailty have been extensively studied in recent years. Combining assessment tools and biomarkers can facilitate the early diagnosis of frailty. However, there is a lack of stable and reliable frailty-related biomarkers for use in clinical practice. Advances in the multi-omics platforms have provided new information on the molecular mechanisms underlying frailty. Thus, identifying biomarkers using omics-based approaches helps explore the physiological mechanisms underlying frailty, and aids the evaluation of the risk of frailty development and progression. This article reviews the current status of frailty biomarkers from the genomics, transcriptomics, proteomics, and metabolomics perspectives.
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