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Moss CE, Johnston SA, Kimble JV, Clements M, Codd V, Hamby S, Goodall AH, Deshmukh S, Sudbery I, Coca D, Wilson HL, Kiss-Toth E. Aging-related defects in macrophage function are driven by MYC and USF1 transcriptional programs. Cell Rep 2024; 43:114073. [PMID: 38578825 DOI: 10.1016/j.celrep.2024.114073] [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: 10/27/2023] [Revised: 02/15/2024] [Accepted: 03/21/2024] [Indexed: 04/07/2024] Open
Abstract
Macrophages are central innate immune cells whose function declines with age. The molecular mechanisms underlying age-related changes remain poorly understood, particularly in human macrophages. We report a substantial reduction in phagocytosis, migration, and chemotaxis in human monocyte-derived macrophages (MDMs) from older (>50 years old) compared with younger (18-30 years old) donors, alongside downregulation of transcription factors MYC and USF1. In MDMs from young donors, knockdown of MYC or USF1 decreases phagocytosis and chemotaxis and alters the expression of associated genes, alongside adhesion and extracellular matrix remodeling. A concordant dysregulation of MYC and USF1 target genes is also seen in MDMs from older donors. Furthermore, older age and loss of either MYC or USF1 in MDMs leads to an increased cell size, altered morphology, and reduced actin content. Together, these results define MYC and USF1 as key drivers of MDM age-related functional decline and identify downstream targets to improve macrophage function in aging.
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Affiliation(s)
- Charlotte E Moss
- Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK; Healthy Lifespan Institute, University of Sheffield, Sheffield, UK
| | - Simon A Johnston
- Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK
| | - Joshua V Kimble
- Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK; Healthy Lifespan Institute, University of Sheffield, Sheffield, UK
| | - Martha Clements
- Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK
| | - Veryan Codd
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK; National Institute for Healthcare Research, Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Stephen Hamby
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK; National Institute for Healthcare Research, Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Alison H Goodall
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK; National Institute for Healthcare Research, Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Sumeet Deshmukh
- School of Biosciences, University of Sheffield, Sheffield, UK
| | - Ian Sudbery
- School of Biosciences, University of Sheffield, Sheffield, UK
| | - Daniel Coca
- Healthy Lifespan Institute, University of Sheffield, Sheffield, UK; Department of Autonomic Control and Systems Engineering, University of Sheffield, Sheffield, UK
| | - Heather L Wilson
- Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK; Healthy Lifespan Institute, University of Sheffield, Sheffield, UK.
| | - Endre Kiss-Toth
- Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK; Healthy Lifespan Institute, University of Sheffield, Sheffield, UK; Biological Research Centre, Szeged, Hungary.
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Harper EI, Sheedy EF, Stack MS. With Great Age Comes Great Metastatic Ability: Ovarian Cancer and the Appeal of the Aging Peritoneal Microenvironment. Cancers (Basel) 2018; 10:E230. [PMID: 29996539 PMCID: PMC6070816 DOI: 10.3390/cancers10070230] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/02/2018] [Accepted: 07/04/2018] [Indexed: 12/22/2022] Open
Abstract
Age is one of the biggest risk factors for ovarian cancer. Older women have higher rates of diagnosis and death associated with the disease. In mouse models, it was shown that aged mice had greater tumor burden than their younger counterparts when intraperitoneally injected with ovarian tumor cells. While very few papers have been published looking at the direct link between ovarian cancer metastasis and age, there is a wealth of information on how age affects metastatic microenvironments. Mesothelial cells, the peritoneal extracellular matrix (ECM), fibroblasts, adipocytes and immune cells all exhibit distinct changes with age. The aged peritoneum hosts a higher number of senescent cells than its younger counterpart, in both the mesothelium and the stroma. These senescent cells promote an inflammatory profile and overexpress Matrix Metalloproteinases (MMPs), which remodel the ECM. The aged ECM is also modified by dysregulated collagen and laminin synthesis, increases in age-related crosslinking and increasing ovarian cancer invasion into the matrix. These changes contribute to a vastly different microenvironment in young and aged models for circulating ovarian cancer cells, creating a more welcoming “soil”.
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Affiliation(s)
- Elizabeth I Harper
- Department of Chemistry and Biochemistry, University of Notre Dame, South Bend, IN 46617, USA.
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN 46617, USA.
- Integrated Biomedical Sciences Program, University of Notre Dame, South Bend, IN 46617, USA.
| | - Emma F Sheedy
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN 46617, USA.
- Department of Mathematics, University of Notre Dame, South Bend, IN 46617, USA.
| | - M Sharon Stack
- Department of Chemistry and Biochemistry, University of Notre Dame, South Bend, IN 46617, USA.
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN 46617, USA.
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Abstract
Estrogens play a vital role in the development of sexually dimorphic characteristics essential for reproduction. In recent years, insight has been gained into the role of estrogens in non-reproductive pathophysiological processes, including neoplasia, vascular disease and osteoporosis. Intriguingly, the skin appears to act as an end-organ target for estrogenic action; marked structural and functional skin changes occurring after the menopause can be related to altered hormonal profiles. One of the most important consequences of such hormonal changes is the age-related delay in cutaneous wound healing, leading to substantial morbidity and mortality, and increased costs to health services. Reduced estrogen levels have major downstream effects on cellular and tissue responses to injury; such downstream effects include impaired cytokine signal transduction, unchecked inflammation, and altered protein balance, and have a major impact on the rate of wound healing. Further understanding of the complex interaction between aging cells and the hormonal micro-environment is essential to develop focused therapeutic strategies to improve cutaneous wound healing in hypogonadal individuals, including the elderly.
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Cheng B, Hornick TR, Hassan MO, Chou SC, Abraham S, Kowal J. Effects of prolonged ACTH-stimulation on adrenocortical accumulation of lipofuscin granules in aged rats. Tissue Cell 1999; 31:594-604. [PMID: 10669932 DOI: 10.1054/tice.1999.0077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Subcellular deposition of lipofuscin granules is a marker of aging. Human and rodent adrenal cortices accumulate lipofuscin granules with age, but the mechanism that leads to the accumulation is not known. The ultrastructural appearance of lipofuscin granules resembles that of secondary lysosomes. Since adrenocortical subcellular events are predominantly influenced by ACTH action, we therefore studied the effect of prolonged ACTH-stimulation on adrenocortical accumulation of secondary lysosome-like granules, designated herein as lipofuscin granules. Using aged Fischer 344 male rats as a model, we found that a 7 day ACTH stimulation exerts a reducing effect on adrenocortical lipofuscin accumulation. Thus, adrenocortical accumulation of lipofuscin granules with age in vivo may not be an irreversible process.
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Affiliation(s)
- B Cheng
- Department of Biochemistry, Kuwait University Faculty of Medicine.
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Abstract
Changes in the T-lymphocyte compartment represent the most critical component of immunological aging. Recent studies have demonstrated that the age-related decline in T-cell-mediated immunity is a multifactorial phenomenon affecting T-cell subset composition as well as several proximal events such as protein tyrosine phosphorylation, generation of second messengers, calcium mobilization and translocation of protein kinase C, and distal events such as lymphocyte proliferation and cytokine production of the T-cell activation pathway. Age-related T-cell immune deficiency is preceded by thymic involution and is influenced by several intrinsic as well as extrinsic factors. Further, the role of monocytes and macrophages in T-cell activation changes with advancing age. This brief review will summarize the current knowledge of the cellular as well as molecular aspects of immunodeficiency of T cells due to aging, some of the paradoxes of aging as related to T-cell-mediated immunity, and possible factors which contribute to this paradox. Finally, experimental approaches will be suggested that might resolve these controversies and that might provide insights into the diverse and complex mechanisms that contribute to immunodeficiency of T cells. Ultimately these studies may suggest possible therapeutic interventions to enhance immune function in the elderly.
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Affiliation(s)
- B Chakravarti
- Department of Medicine and Center on Aging, University of Rochester Cancer Center, University of Rochester Medical Center, NY 14642, USA
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Shimada Y, Ito H. Heterogeneous aging of macrophage-lineage cells in the capacity for TNF production and self renewal in C57BL/6 mice. Mech Ageing Dev 1996; 87:183-95. [PMID: 8794446 DOI: 10.1016/0047-6374(96)01704-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We examined age-related changes in both tumor necrosis factor-alpha (TNF) producing ability and the replicative capacity of macrophage-lineage cells from different anatomical tissues concomitantly in mice. We have previously demonstrated that alveolar macrophages of aged mice secreted decreased amounts of TNF activity compared with that of younger counterpart. In this study, it is demonstrated that peritoneal macrophages exhibited increased TNF activity with aging, while the bone marrow-derived adherent cells secreted less TNF activity. In addition, we showed that the numbers of their progenitor cells (GM-CFUs) in the bone marrow increased with age, whereas those in the spleen did not change with aging. We conclude that age associated changes in functions and proliferative capacities of macrophage-lineage cells are tissue dependent.
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Affiliation(s)
- Y Shimada
- Division of Biology and Oncology, National Institute of Radiological Sciences, Chiba, Japan
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