The frequency of CD127low expressing CD4+CD25high T regulatory cells is inversely correlated with human T lymphotrophic virus type-1 (HTLV-1) proviral load in HTLV-1-infection and HTLV-1-associated myelopathy/tropical spastic paraparesis

2008

CD127low T Regulatory Cells and HTLV-1 Infection

Sample size: 26 publication 10 minutes Evidence: moderate

Author Information

Author(s): Michaëlsson Jakob, Barbosa Hugo Marcelo R, Jordan Kimberley A, Chapman Joan M, Brunialti Milena KC, Neto Walter Kleine, Nukui Youko, Sabino Ester C, Chieia Marco Antonio, Oliveira Acary Souza Bulle, Nixon Douglas F, Kallas Esper G

Primary Institution: University of California, San Francisco

Hypothesis

HTLV-1 compromises TReg cell function, resulting in higher T cell activation, which contributes to HAM/TSP development.

Conclusion

The study suggests that TReg cells may be subverted in HAM/TSP patients, contributing to increased T cell activation and providing potential therapeutic targets.

Supporting Evidence

HTLV-I drives activation, spontaneous IFNγ production, and proliferation of CD4+ T cells.
HAM/TSP patients have a significantly lower proportion of CTLA-4+ TReg cells compared to healthy controls.
The proportion of CD127low TReg cells correlated inversely with HTLV-1 proviral load.

Takeaway

This study found that a type of immune cell called TReg cells is less frequent in patients with a specific disease caused by a virus, which might help explain why their immune system is overactive.