Plasma metabolic shifts link to T-cell senescence and mortality in older COVID-19 patients
Dysregulated phospholipid and bile acid metabolism tracked with cytokine spikes and 180-day mortality, while a specific lipid attenuated senescent markers in cell tests.
Biomedicines · Shang Y et al. · Paper published 19 Sep 2026
Researchers profiled the plasma metabolome of elderly COVID-19 patients and healthy controls to examine links between circulating metabolites, immune dysfunction, and survival. Machine learning revealed 24 key metabolites linked to 180-day mortality, mainly involving bile acid metabolism, fatty acid oxidation, and phospholipid pathways. Non-survivors showed higher levels of PE 36:3, glycochenodeoxycholic acid, and deoxycholic acid, alongside elevated levels of five cytokines: GRO-α, IL-6, IL-8, IP-10, and TSLP. Dysregulated phospholipids, including PC, LPC, PE, and LPE, correlated with T-cell senescence. In vitro tests showed that exogenous LPE 18:1 attenuated selected markers of T-cell senescence. Furthermore, altered metabolites correlated with inflammatory cytokine profiles.
Why it matters
The findings suggest that circulating metabolic disturbances may actively drive immune aging and heightened vulnerability to severe infections in older adults. Targeting specific lipid pathways could offer new avenues to manage age-related immune decline.
Caveats
The primary clinical findings are based on observational data, and cohort sizes were not disclosed in the abstract. Additionally, the restorative effects of LPE 18:1 were observed solely in cell culture models rather than in vivo.
Written from the paper’s abstract, and every claim checked against it before publishing. Read the paper for the full methods and data.
The paper
Plasma Metabolomic Alterations Are Associated with T-Cell Senescence, Cytokine Dysregulation, and Prognosis in Elderly COVID-19 Patients
Shang Y, Zhang H, Lang Y et al.
Biomedicines · 19 Sep 2026 · Peer-reviewed
- Relevance
- Relevant
- News value
- Notable
- Evidence
- Humans
- Status
- Peer-reviewed
More on Cellular senescence
See allDasatinib and quercetin reduce liver fibrosis in a phase-2 MASH trial
The senolytic combination improved liver fibrosis without disease worsening in nearly half of treated participants while lowering cellular senescence markers.
Nature metabolism · Koning M et al.
A distinct p21-driven macrophage senotype accumulates during aging and liver disease
Researchers identified a p53-p21-Cyclin D2 axis that governs senescent macrophages in mice and human liver cirrhosis and can be cleared with senolytics.
bioRxiv · Torres G et al.
DNA methylation proxies of senescence markers track human disease and mortality
The new blood-based tools estimate senescence gene activity to predict incident diseases, all-cause mortality, and clinical treatment responses.
medRxiv · Simpson DJ et al.
Bispecific T cell engager eliminates senescent cells in mice and nonhuman primates
Monitored by serum transaminase levels, low doses of the drug alleviated age-related pathologies without causing the hepatotoxicity seen at higher doses.
Aging cell · Deng J et al.
A deep learning score for cellular senescence predicts human mortality and disease risk
The proteomic biomarker tracked chronic illness risk in the UK Biobank and shifted following an 18-month multimodal exercise intervention.
Aging cell · Zhao S et al.