ArticleThe Journal of clinical investigation2021
The lung microenvironment shapes a dysfunctional response of alveolar macrophages in aging.
Article in The Journal of clinical investigation, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 122 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
122 citing papers in PubMed, 1 synthesis or guideline pooled it, 167 citations in OpenAlex.
- Shared and niche-specific transcriptional signatures of macrophage aging revealed by a cross-tissue meta-analysis.BMC biology · 2026Pooled it
- Monocytes in pneumonia: Functional plasticity and innate memory (Review).International journal of molecular medicine · 2026Review
- Alveolar Macrophages: Development, Respiratory Homeostasis, Signal Pathways, Diseases, and Therapeutic Opportunities.MedComm · 2026Review
- CpG content contributes to tissue-resident macrophage enhancer selection.Nucleic acids research · 2026Article
- Cellular hallmarks and aging clock of the human lung parenchyma.Nature communications · 2026Article
- Differential activation of NF-Κβ and HIF-1α between fetal liver-derived and myeloid-derived macrophages drives inflammatory differences followingInfection and immunity · 2026Article
- Ageing-associated regenerative failure in the lung: stem cell senescence and transitional cell persistence in idiopathic pulmonary fibrosis.European respiratory review : an official journal of the European Respiratory Society · 2026Review
- The ageing immune system as a driver of systemic ageing.Nature reviews. Immunology · 2026Review
- The cell with many faces: lung macrophage plasticity and function in response to environmental and pathogenic insults.Physiological reviews · 2026Review
- Immunosenescence in systemic and multi-organ aging: mechanisms, inter-organ crosstalk, and translational opportunities.npj aging · 2026Review
- Epigenetic de-repression of basal cell metaplasia in aging AT2 cells is a risk factor for idiopathic pulmonary fibrosis (IPF).bioRxiv : the preprint server for biology · 2026Article
- NF-κB-activated fibroblasts orchestrate inflammaging and emergence of pro-inflammatory granzyme KImmunity · 2026Article
- Myeloid-derived alveolar-like macrophages are a tractable model to understand the role of ontogeny in alveolar macrophage functionbioRxiv : the preprint server for biology · 2026Article
- Pathogen-specific host responses define distinct pneumonia endotypes in the human lung.bioRxiv : the preprint server for biology · 2026Article
- Testosterone protects from metabolic syndrome-associated lung dysfunction in a high-fat diet rabbit model.Endocrinology · 2026Article
- Telomere damage-mediated senescence in alveolar epithelial type II cells but not in macrophages aggravates inflammation in acute lung injury.Respiratory research · 2026Article
- Chronic IL-21 exposure reshapes pulmonary environment, elevating risk of respiratory diseases.Cellular and molecular life sciences : CMLS · 2026Article
- Respiratory virus immune response in the aged host.Immunity & ageing : I & A · 2026Review
- Sex-associated transcriptional changes to synovial macrophages in the aging joint.Frontiers in immunology · 2026Article
- Immunosenescence and susceptibility to respiratory viruses: a state-of-the-art review.European respiratory review : an official journal of the European Respiratory Society · 2026Review
62 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
34 authors at 3 institutions in 2 countries.
Funding
Abstract
Alveolar macrophages orchestrate the response to viral infections. Age-related changes in these cells may underlie the differential severity of pneumonia in older patients. We performed an integrated analysis of single-cell RNA-Seq data that revealed homogenous age-related changes in the alveolar macrophage transcriptome in humans and mice. Using genetic lineage tracing with sequential injury, heterochronic adoptive transfer, and parabiosis, we found that the lung microenvironment drove an age-related resistance of alveolar macrophages to proliferation that persisted during influenza A viral infection. Ligand-receptor pair analysis localized these changes to the extracellular matrix, where hyaluronan was increased in aged animals and altered the proliferative response of bone marrow-derived macrophages to granulocyte macrophage colony-stimulating factor (GM-CSF). Our findings suggest that strategies targeting the aging lung microenvironment will be necessary to restore alveolar macrophage function in aging.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.