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Use of Low Doses of Interleukin-2 in Autism Spectrum Disorders

NCT07589842 · Status: NOT_YET_RECRUITING · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 22

Last updated 2026-05-15

No results posted yet for this study

Summary

Autism spectrum disorders (ASD) are neurodevelopmental disorders that affect around 1% of the population. Matenral immune activation (MIA) during pregnancy is a risk factor for ASD in children (Han 2021), mediated by maternal secretion of IL-17a, which disrupts neurodevelopment (Choi 2016). MIA causes a long-lasting disruption of the Tregs/Th17 balance in offspring (decrease in anti-inflammatory Tregs/increase in pro-inflammatory Th17s) via epigenetic mechanisms (Lim 2021; Ellul 2021). In a mouse model of MIA, adoptive transfer of Tregs was able to normalise autistic behaviour, highlighting the importance of Tregs in maintaining the autistic phenotype (Xu, 2021). In this same model, we have shown that IL-2fd (i) stimulates Tregs, (ii) corrects meningeal inflammation (iii) normalises synaptic connectivity and (iv) normalises autistic behaviour in the offspring (Ellul 2025). In humans, the use of low doses of interleukin-2 (IL2-fd) (ILT-101) leads to activation and selective expansion of Tregs and a reduction in Th17 (Klatzmann 2015), including in children (Rosenzwajg 2020). We hypothesise that the use of IL2-fd (ILT-101) in ASD patients born to mothers with a history of MIA could correct the Tregs deficiency and improve autistic symptoms.

Conditions

Interventions

DRUG

ILT-101 ld-(IL2)

ILT-101 (0.8 MUI/m²/day) subcutaneously. Daily administration for 5 consecutive days (D1 to D5) every 4 weeks for 6 months (i.e. 7 courses of 5 days each).

DRUG

NaCl (0,9%)

Placebo (NaCl 0,9%), subcutaneously. Same administration schedule as for ILT-101.

Sponsors & Collaborators

  • Iltoo Pharma

    collaborator INDUSTRY

  • Assistance Publique - Hôpitaux de Paris

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
6 Years
Max Age
8 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-10-01
Primary Completion
2028-11-30
Completion
2029-08-01

Countries

  • France

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07589842 on ClinicalTrials.gov