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CompletedNCT01347242Updated Jun 3, 2021

Gene Therapy for Wiskott-Aldrich Syndrome (WAS)

A Phase 1/2 interventional study of Autologous CD34 positive cells transduced with a lentiviral vector containing human WAS gene in Wiskott-Aldrich Syndrome, sponsored by Genethon. Completed at 2 sites in United Kingdom. Open to male participants. Per ClinicalTrials.gov, last updated 2021-06-03.

Sponsored by Genethon · Phase 1/2, Interventional, and Treatment

Phase
Phase 1/2
Study type
Interventional
Enrollment
6
Allocation
Not applicable
Sex
Male
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Study summary

This is a phase I/II study to evaluate the safety and efficacy of Hematopoietic Stem Cell genetherapy for the Wiskott-Aldrich Syndrome.

Read the detailed description

This clinical trial is an ex vivo gene therapy trial. The investigational product corresponds to autologous CD34+ cells transduced with a lentiviral vector harboring the human WASP gene.

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Conditions studied

  • Wiskott-Aldrich Syndrome

Keywords

  • Wiskott-Aldrich Syndrome
  • Primary immune deficiency
  • ex vivo gene therapy
  • hematopoietic stem cells
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In context

Wiskott-Aldrich Syndrome

37 studies on the registry are indexed under Wiskott-Aldrich Syndrome; 4 are open to participants now.

This study's enrollment of 6 is below the median of 18 across 26 interventional studies indexed under Wiskott-Aldrich Syndrome.

Browse Wiskott-Aldrich Syndrome studies →

Lead sponsor

Genethon is the lead sponsor of 15 studies on the registry; 5 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
Male
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • males of all ages
  • severe WAS (clinical score 3-5) or absence of WAS protein in peripheral blood mononuclear cells determined by Western blotting and flow cytometry
  • molecular confirmation by WAS gene DNA sequencing
  • lack of HLA-genotypically identical bone marrow or of a 10/10 antigen HLA-matched unrelated donor or cord blood after 3 month search
  • parental, guardian, patient signed informed consent/assent
  • willing to return for follow-up
  • only for patients who have received previous allogenic hematopoietic stem cell transplant:
  • failed allogenic hematopoietic stem cell transplant
  • contraindication to repeat transplantation

Exclusion criteria

Exclusion Criteria:

  • patient with HLA-genotypically identical bone marrow
  • patient with 10/10 antigen HLA-matched unrelated donor or cord blood
  • contraindication to leukapheresis
  • contraindication to bone marrow harvest
  • contraindication to administration of conditioning medication
  • HIV positive patient
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Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
6 participants (actual)

Study arms

  • Experimental
    study treatment

    autologous CD34 positive cells transduced with a lentiviral vector containing the human WAS gene

    Genetic: Autologous CD34 positive cells transduced with a lentiviral vector containing human WAS gene

Interventions

  • GeneticAutologous CD34 positive cells transduced with a lentiviral vector containing human WAS gene

    transplantation of patient's autologous CD34+ cells transduced with lentiviral vector containing human WAS gene

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What researchers measure

Primary outcomes

  1. Improvement in the eczema status

    Improvement in the eczema status as compared with the baseline status at study entry on clinical evaluation

    Time frame: 2 years

  2. Reduction in the frequency and severity of infection episodes

    Reduction in the frequency and severity of infection episodes as compared with the baseline status and the patient's historical data collected over the 2 years prior to study entry

    Time frame: 2 years

  3. Reduction in the frequency and severity of bruising and bleeding episodes

    Reduction in the frequency and severity of bruising and bleeding episodes as compared with the baseline status and the patient's historical data collected over the 2 years prior to study entry

    Time frame: 2 years

  4. Reduction in the frequency and severity of autoimmune disorders

    Reduction in the frequency and severity of autoimmune disorders as compared with the baseline status at study entry

    Time frame: 2 years

  5. Reduction in the number of disease related days of hospitalization

    Reduction in the number of disease related days of hospitalization as compared with the patient's historical data collected over the 2 years prior to study entry

    Time frame: 2 years

Secondary outcomes

  1. Occurrence and type of adverse events

    Occurrence and type of adverse events reported during the course of the study

    Time frame: 2 years

  2. Change in medical conditions

    Assessment of weight, vital signs, ECG and laboratory exams during the course of the study

    Time frame: 2 years

  3. Safety of lentivirus gene transfer into Hematopoietic Stem Cells

    Detection of replication competent lentivirus (RCL) and lentivirus integration sites analysis

    Time frame: 3, 6, 12, 24 months / 6, 12, 18, 24 months

  4. Improvement of microthrombocytopenia

    Improvement of microthrombocytopenia as compared with the baseline evaluation at study entry

    Time frame: 3, 6, 12, 24 months

  5. Decrease in the number and volume of platelets transfusions

    Decrease in the number and volume of platelets transfusions as compared with patient's historical data collected over the 2 years prior to study entry

    Time frame: 2 years

  6. Evidence of sustained engrafment of WASP-expressing transduced cells

    Quantification of vector copy numbers and detection of vector-derived WASP expression

    Time frame: 6 weeks, 1, 3, 6, 9, 12, 18 & 24 months

  7. Reconstitution of humoral and cell mediated immunity

    Reconstitution of humoral and cell mediated immunity as compared with the baseline evaluation at study entry

    Time frame: 9, 12, 18 & 24 months

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Study locations

2 sites
  • Great Ormond Street Hospital
    London, WC1N 1EH, United Kingdom
  • Royal Free Hospital
    London, WC1N 1EH, United Kingdom
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References and documents

Publications

  • Magnani A, Semeraro M, Adam F, Booth C, Dupre L, Morris EC, Gabrion A, Roudaut C, Borgel D, Toubert A, Clave E, Abdo C, Gorochov G, Petermann R, Guiot M, Miyara M, Moshous D, Magrin E, Denis A, Suarez F, Lagresle C, Roche AM, Everett J, Trinquand A, Guisset M, Bayford JX, Hacein-Bey-Abina S, Kauskot A, Elfeky R, Rivat C, Abbas S, Gaspar HB, Macintyre E, Picard C, Bushman FD, Galy A, Fischer A, Six E, Thrasher AJ, Cavazzana M. Long-term safety and efficacy of lentiviral hematopoietic stem/progenitor cell gene therapy for Wiskott-Aldrich syndrome. Nat Med. 2022 Jan;28(1):71-80. doi: 10.1038/s41591-021-01641-x. Epub 2022 Jan 24. PubMed 35075289 ↗
  • Morris EC, Fox T, Chakraverty R, Tendeiro R, Snell K, Rivat C, Grace S, Gilmour K, Workman S, Buckland K, Butler K, Chee R, Salama AD, Ibrahim H, Hara H, Duret C, Mavilio F, Male F, Bushman FD, Galy A, Burns SO, Gaspar HB, Thrasher AJ. Gene therapy for Wiskott-Aldrich syndrome in a severely affected adult. Blood. 2017 Sep 14;130(11):1327-1335. doi: 10.1182/blood-2017-04-777136. Epub 2017 Jul 17. PubMed 28716862 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 3, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT01347242
Lead sponsor
Genethon
Collaborators
Great Ormond Street Hospital for Children NHS Foundation Trust, Institute of Child Health
Responsible party
Sponsor
First posted
May 4, 2011
Start date
Mar 2011
Primary completion
Nov 13, 2019
Completion
Nov 13, 2019
Last update
Jun 3, 2021

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2019. You cannot join it, but the record below documents what was studied.

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