A Clinical Study to Evaluate the Use of a Cryopreserved Formulation of OTL-103 in Subjects With Wiskott-Aldrich Syndrome

Fondazione Telethon

Status and phase: Active, not recruiting; Phase 3

Conditions: Wiskott-Aldrich Syndrome

Treatments: Genetic: OTL-103

Study type: Interventional

Funder types: Other

Identifiers

NCT03837483

2018-003842-18 (EudraCT Number)

OTL-103-4

Details and patient eligibility

About

This is an open-label, single arm study to evaluate the cryopreserved formulation of OTL-103 Gene Therapy. OTL-103 consists of autologous CD34+ hematopoietic stem cells in which the gene encoding for the Wiskott-Aldrich Syndrome is introduced by means of a third generation lentiviral vector.

Enrollment: 10 patients

Sex: All

Ages: Under 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Age: up to 65 years

• Diagnosis of WAS defined by genetic mutation and at least one of the following criteria:

  • Severe Wiskott-Aldrich Syndrome (WAS) gene mutation, defined by literature data (genotype/phenotype studies).;
  • Absent WASP expression, assessed by flow cytometry;
  • Severe clinical score (Zhu clinical score ≥ 3);

• No human leukocyte antigen (HLA)-identical related donor available for hematopoietic stem cells transplant (HSCT).

Exclusion criteria

• End-organ dysfunction, severe active infection not responsive to treatment or other severe disease or clinical condition which, in the judgment of the investigator, would make the patient inappropriate for entry into this study.
• Malignant neoplasia (except local skin cancer) or a documented history of hereditary cancer syndrome.
• Myelodysplasia, cytogenetic alterations characteristic of myelodysplastic syndrome and acute myeloid leukaemia , or other serious haematological disorders
• Documented human immunodeficiency virus (HIV) infection
• Prior allogeneic hematopoietic stem cell transplantation, with evidence of residual cells of donor origin
• Symptomatic herpes zoster, not responsive to specific treatment
• Evidence of acute tuberculosis
• Acute or chronic stable Hepatitis B
• Presence of positive Hepatitis C RNA test result at screening
• Patients not eligible for mobilization protocols in order to obtain CD34+ cells
• Previous Gene Therapy

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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10 participants in 1 patient group

Gene Therapy

Experimental group

Description:

OTL-103, Autologous CD34+ hematopoietic stem cells transduced ex vivo with a lentiviral vector encoding the human WAS gene

Treatment:

Genetic: OTL-103