Level of IL-6, TNF, and IL-1β and Age-related Diseases: a Systematic Review and Meta-analysis
Overview
Affiliations
Introduction: Chronic low-grade inflammation is an important aspect of morbidity and mortality in older adults. The level of circulating pro-inflammatory cytokines (interleukin (IL)-6, tumor necrosis factor (TNF) or IL-1β) is a risk factor in cardiovascular and neurodegenerative diseases and is also associated with sarcopenia and frailties. The objective of this study was to assess each cytokine: IL-6, TNF, and IL-1β separately in the elderly with comorbidities against controls without diseases according to the data published in the available literature.
Methods: The electronic bibliographic PubMed database was systematically searched to select all the relevant studies published up to July 2023. The total number of the subjects involved in the meta-analysis included patients with diseases (=8154) and controls (=33967).
Results: The overall concentration of IL-6 was found to be higher in patients with diseases compared to controls and the difference was statistically significant, with a -value of <0.001 (SMD, 0.16; 95% CI, 0.12-0.19). The heterogeneity was considerable with Q = 109.97 (P <0.0001) and I = 79.2%. The potential diagnostic usefulness of IL-6 was confirmed by odds ratio (OR) analysis (OR: 1.03, 95% CI (1.01; 1.05), =0.0029). The concentration of both TNF and IL-1β was elevated in the control group compared to patients and amounted to SMD -0.03; 95% CI, -0.09-0.02, -value 0.533 and SMD-0.29; 95% CI, -0.47- -0.12; = 0.001, respectively. For TNF, however, the difference was statistically insignificant.
Discussion: IL-6, unlike TNF and IL-1β, could be a useful and convenient marker of peripheral inflammation in older adults with various comorbidities.
Sniadach J, Kicman A, Michalska-Falkowska A, Jonczyk K, Waszkiewicz N Int J Mol Sci. 2025; 26(5).
PMID: 40076424 PMC: 11898610. DOI: 10.3390/ijms26051796.
Cytokine Signature Unveils Subgroups of Patients With Immune-Mediated Sensory Neuronopathies.
Moritz C, Tholance Y, Borowczyk C, Jospin F, Paul S, Antoine J J Peripher Nerv Syst. 2025; 30(1):e70008.
PMID: 40037793 PMC: 11879705. DOI: 10.1111/jns.70008.
Sater M, Malalla Z, Ali M, Giha H Int J Environ Res Public Health. 2025; 22(2).
PMID: 40003433 PMC: 11855404. DOI: 10.3390/ijerph22020207.
Beyond Amyloid and Tau: The Critical Role of Microglia in Alzheimer's Disease Therapeutics.
Dias D, Socodato R Biomedicines. 2025; 13(2).
PMID: 40002692 PMC: 11852436. DOI: 10.3390/biomedicines13020279.
From Bench to Bedside: Translating Cellular Rejuvenation Therapies into Clinical Applications.
Saliev T, Singh P Cells. 2025; 13(24.
PMID: 39768144 PMC: 11674796. DOI: 10.3390/cells13242052.