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A Single Arm, Open Label Clinical Study of Hematopoietic Stem Cell Gene Therapy with Cryopreserved Autologous CD34+ Cells Transduced with Lentiviral Vector encoding WAS cDNA in Subjects with Wiskott-Aldrich Syndrome (WAS)

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-517792-20-00
Acronym
OTL-103-4
Enrollment
9
Registered
2024-10-28
Start date
Unknown
Completion date
Unknown
Last updated
2025-09-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Wiskott-Aldrich Syndrome

Brief summary

Evaluation of the clinical efficacy: • annualized rate of severe infections from 6 to 18 months after gene therapy (GT) compared with 1 year prior to GT; • annualized rate of moderate and severe bleeding episodes up to 1 year after GT compared with 1 year prior to GT.

Detailed description

• Evaluation of the overall survival at 12, 24 and 36 months • Evaluation of the safety of treatment: 1) safety and tolerability as measured by adverse event (AE) reporting; 2) absence of malignancy or abnormal clonal proliferation (ACP) development due to insertional oncogenesis; 3) absence of replication-competent lentivirus (RCL). • Evaluation of the engraftment at 6 months • Evaluation of biological correlates of efficacy at 12 months, 2 years and 3 years

Interventions

DRUGBUSULFAN
DRUGFLUDARABINE PHOSPHATE
DRUGPLERIXAFOR
DRUGRITUXIMAB

Sponsors

Fondazione Telethon Ets
Lead SponsorOTHER

Eligibility

Sex/Gender
Male
Age
0 Years to 64 Years

Design outcomes

Primary

MeasureTime frame
Evaluation of the clinical efficacy: • annualized rate of severe infections from 6 to 18 months after gene therapy (GT) compared with 1 year prior to GT; • annualized rate of moderate and severe bleeding episodes up to 1 year after GT compared with 1 year prior to GT.

Secondary

MeasureTime frame
• Evaluation of the overall survival at 12, 24 and 36 months • Evaluation of the safety of treatment: 1) safety and tolerability as measured by adverse event (AE) reporting; 2) absence of malignancy or abnormal clonal proliferation (ACP) development due to insertional oncogenesis; 3) absence of replication-competent lentivirus (RCL). • Evaluation of the engraftment at 6 months • Evaluation of biological correlates of efficacy at 12 months, 2 years and 3 years

Countries

Italy

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026