ArticleJournal of medical virology2025
TTV Species Diversity as a Novel Biomarker of Immune Dysregulation in Aging.
Article in Journal of medical virology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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.
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Who cites it
4 citing papers in PubMed.
- Association between Torque teno virus-DNA plasma loads and post-transplantation diabetes mellitus in the first year after kidney transplantation.BMC nephrology · 2026Article
- Torque Teno Virus Levels During Viral Respiratory Infections: The Interplay With Immune Dysregulation and Coagulopathy Biomarkers.Journal of medical virology · 2026Article
- TTV Species Diversity as a Novel Biomarker of Immune Dysregulation in Aging.Journal of medical virology · 2025Article
- The gut and circulating virome: emerging players in aging and longevity.Frontiers in aging · 2025Review
Corrections and comments
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Authors and funding
36 authors.
Funding
Abstract
Torquetenovirus (TTV) is a prevalent virus whose clinical significance remains unclear, potentially linked to immunosenescence. This study examines TTV species in relation to immune impairment, inflammation, and cellular stress response in aging. A subset of recruited age-stratified individuals (RASIG) from the MARK-AGE study was divided into three groups: Cohort 1 A (healthy young adults), Cohort 1B (older adults with mild immune decline), and Cohort 1 C (older adults with marked immune impairment). Analyses included TTV load, species diversity, lymphocyte subpopulations, inflammatory markers, Poly-(ADP-ribose) polymerase (PARP-1) expression/activity. Alpha- and beta-diversity analyses showed the highest TTV species diversity in Cohort 1 C, with significant cohort-dependent differences and partially cohort-specific clustering patterns. Increased TTV species number correlated with higher TTV load, elevated CMV IgG levels, and greater immune impairment risk. Specific TTV species were associated with CD4/CD8, and reduced T-cell receptor excision circles, suggesting impaired T-cell homeostasis. TTV viremia positively correlated with C-reactive protein (CRP) and α2-macroglobulin. PARP-1 expression and activity increased in individuals with higher TTV diversity, particularly in the presence of TTV9 and TTV20. TTV load and species diversity are associated with immunosenescence, inflammation, and PARP-1 activation suggesting their potential as biomarkers of age-related immune decline. Longitudinal studies are needed to clarify underlying mechanisms.
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Registered trials
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