Key result
Plasma TTV DNA load is elevated in Crohn's disease but fails to predict relapse.
Why the study?
Torque teno virus DNA load in plasma is suggested as a marker for immunosuppression, but its role and correlation with relapse in Crohn's disease patients in remission is unclear.
Does plasma TTV DNA load differ between Crohn's disease patients and controls, and can it predict disease relapse?
Cohort (n=88)
Does plasma TTV DNA load differ between Crohn's disease patients and controls, and can it predict disease relapse?
Absolute Event Rate: 3.27% vs 2.05%
p-value: p=0.0004
Plasma TTV DNA load is elevated in Crohn's disease patients and correlates with reduced T cell counts, but does not predict clinical relapse.
Torque teno virus (TTV) DNA load in plasma is suggested as a marker for immunosuppression post-transplantation. Crohn's disease (CD) arises from genetic susceptibility, environmental factors, and dysbiosis, causing immune responses. This study examines TTV DNA load in CD patients in remission and its correlation with relapse. Using quantitative real-time polymerase chain reaction (PCR) and metagenomic analysis, the dynamic of plasma TTV DNA load was analyzed from a cohort of CD patients (n = 39) over 1 year and compared with controls (n = 49). At inclusion, TTV DNA was significantly higher in CD patients compare to control (Median [IQR]: 3.27 [2.43-3.67] and 2.05 [1.28-2.80] Log copies/mL, p = 0.0004). Plasma TTV DNA load failed to predict disease relapse in CD patients. Augmented plasma TTV DNA levels in CD patients correlated with diminished circulating CD3 + T cells and especially CD4 + T cells. No preferential representation of TTV subspecies or Anelloviridae genera was detected in CD patients' plasma. This study revealed elevated TTV DNA levels in CD patients' plasma compared to healthy controls, underscoring the intriguing potential of TTV blood sampling as a biomarker in CD.
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Goens et al. (2025) conducted a cohort in Crohn's disease (n=88). Crohn's disease vs. Healthy controls was evaluated on Plasma TTV DNA load at inclusion (Log copies/mL) (p=0.0004). Plasma TTV DNA load was significantly elevated in Crohn's disease patients compared to controls (median 3.27 vs 2.05 Log copies/mL, p=0.0004), but failed to predict disease relapse.
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