Systemic sclerosis & Raynaud's

Induction of regulatory T cells and efficacy of low-dose interleukin-2 in systemic sclerosis: interventional open-label phase 1–phase 2a study

RMD OpenPublished Open-label phase 1–phase 2a interventional study

Authors' conclusion

IL-2LD at a dosage of 1 MIU/day safely and selectively activates and expands Tregs. Clinical signs remain stable during the study period.

Study context

Population
Patients with systemic sclerosis (SSc) without severe organ involvement
Participants
9 patients
Outcome
Treg frequency
Follow-up
Day 8
Methodological detailssingle-group, part of TRANSREG phase IIa basket trial in multiple autoimmune diseases
  • Single-group
  • Part of TRANSREG phase IIa basket trial in multiple autoimmune diseases

Main finding

As reported in the abstract

Treg frequency among CD4+ T lymphocytes, fold increase

Primary endpoint (Treg frequency) reached: fold increase of Treg levels among CD4+ T lymphocytes

1.8±0.5-fold increase

p=0.0015

Further findings

Effector T cells and B cells

No significant changes

Modified Rodnan skin score and Valentini score · month 6

Globally stable

Disease activity and severity, quality of life (EuroQL-5D-5L), pulmonary function tests · study period

Remained stable

Safety

OutcomeValues
Serious adverse events related to treatmentIL-2LD 0 events

Serious adverse events related to treatment

IL-2LD was well tolerated

Original publication

Induction of regulatory T cells and efficacy of low-dose interleukin-2 in systemic sclerosis: interventional open-label phase 1–phase 2a study. RMD Open. Published 4 April 2024. doi:10.1136/rmdopen-2023-003500

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