ArticleAging cell2014
Impaired neutrophil extracellular trap formation: a novel defect in the innate immune system of aged individuals.
Article in Aging cell, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 171 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
171 citing papers in PubMed, 1 synthesis or guideline pooled it, 286 citations in OpenAlex.
- In vitro induction of NETosis: Comprehensive live imaging comparison and systematic review.PloS one · 2017Pooled it
- Long-acting nanoparticulate DNase-1 for effective suppression of SARS-CoV-2-mediated neutrophil activities and cytokine storm.Biomaterials · 2021Trial
- Rejuvenation of Neutrophil Functions in Association With Reduced Diabetes Risk Following Ten Weeks of Low-Volume High Intensity Interval Walking in Older Adults With Prediabetes - A Pilot Study.Frontiers in immunology · 2020Trial
- Simvastatin Improves Neutrophil Function and Clinical Outcomes in Pneumonia. A Pilot Randomized Controlled Clinical Trial.American journal of respiratory and critical care medicine · 2019Trial
- Ten weeks of high-intensity interval walk training is associated with reduced disease activity and improved innate immune function in older adults with rheumatoid arthritis: a pilot study.Arthritis research & therapy · 2018Trial
- Pulmonary Infections in the Elderly Lead to Impaired Neutrophil Targeting, Which Is Improved by Simvastatin.American journal of respiratory and critical care medicine · 2017Trial
- Neutrophil and Monocyte Bactericidal Responses to 10 Weeks of Low-Volume High-Intensity Interval or Moderate-Intensity Continuous Training in Sedentary Adults.Oxidative medicine and cellular longevity · 2017Trial
- Trial
- Review
- What Do We Know About Immune System Aging from Human and Animal Studies?International journal of molecular sciences · 2026Review
- Ageing of the Oral Mucosa: Mechanisms and Consequences.International dental journal · 2026Review
- Review
- Tumor-Associated Neutrophils in Advanced Non-Small Cell Lung Cancer Patients Predicted by Clinicopathologic Characteristics and Peripheral Blood Markers.Saudi medical journal · 2026Article
- Immunosenescence and Cancer: Cellular Aging Programs That Reshape Antitumor Immunity.Immune network · 2026Review
- Time to remission and steroid doses in older and younger patients with polymyalgia rheumatica.European geriatric medicine · 2026Article
- The neutrophil-to-lymphocyte ratio as a marker of immunosenescence and COVID-19 outcomes in the elderly: A narrative review.Physiological reports · 2026Review
- Altered neutrophil signalling linked to impaired chemotaxis and increased ROS and NET production in older people with frailty.Clinical and experimental immunology · 2026Article
- Neutrophil extracellular traps and acute kidney injury: a narrative review.Frontiers in immunology · 2026Review
- Aging and vaccines: impact of immunosenescence and inflammaging in vaccine response.Frontiers in aging · 2026Review
- The Bacterial Swiss Army Knife: ExPEC Utilizes Multiple Resistance Mechanisms to Counteract Host Immune Responses.Vaccines · 2025Review
111 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
8 authors at 1 institution in 1 country.
Funding
Abstract
Neutrophil extracellular traps (NETs) are a recently discovered addition to the defensive armamentarium of neutrophils, assisting in the immune response against rapidly dividing bacteria. Although older adults are more susceptible to such infections, no study has examined whether aging in humans influences NET formation. We report that TNF-α-primed neutrophils generate significantly more NETs than unprimed neutrophils and that lipopolysaccharide (LPS)- and interleukin-8 (IL-8)-induced NET formation exhibits a significant age-related decline. NET formation requires generation of reactive oxygen species (ROS), and this was also reduced in neutrophils from older donors identifying a mechanism for reduced NET formation. Expression of IL-8 receptors (CXCR1 and CXCR2) and the LPS receptor TLR4 was similar on neutrophils from young and old subjects, and neutrophils challenged with phorbol-12-myristate-13-acetate (PMA) showed no age-associated differences in ROS or NET production. Taken together, these data suggest a defect in proximal signalling underlies the age-related decline in NET and ROS generation. TNF-α priming involves signalling through p38 MAP kinase, but activation kinetics were comparable in neutrophils from young and old donors. In a clinical setting, we assessed the capacity of neutrophils from young and older patients with chronic periodontitis to generate NETs in response to PMA and hypochlorous acid (HOCL). Neutrophil extracellular trap generation to HOCL, but not PMA, was lower in older periodontitis patients but not in comparison with age-matched controls. Impaired NET formation is thus a novel defect of innate immunity in older adults but does not appear to contribute to the increased incidence of periodontitis in older adults.
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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.