| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Wiskott-Aldrich syndrome (WAS) is a rare X-linked immunodeficiency caused by mutations in a single gene ,the Wiskott-Aldrich Syndrome Protein (WASP). WAS is characterised by micro-thrombocytopenia, recurrent infections,eczema and associated with a high incidence of auto-immunity and of lymphoid malignancies. Over 150 unique mutations in the WAS gene have been identified.Loss-of-function mutations in this gene have widespread consequences on hematopoietic lineages. | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
| The Wiskott-Aldrich Sydrome (WAS) is a genetic disorder that affects boys. It is caused by errors in a gene that makes a part of the blood and immune system. | 
 
 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Blood and lymphatic diseases [C15] | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease  |  Yes  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| The purpose of this study is to perfom a long term follow up over a 3 years period of patients enrolled in the two clinical centres (UK and France) of the phase 1/2  clinical trial of haematopoietic stem cell gene therapy for the Wiskott-Aldrich Syndrome and treated with autologous CD34+ cells transduced with the w1.6_hWASP_WPRE (VSVg) lentiviral vector. | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
1.	Patients enrolled in the phase I/II and treated by a single infusion of autologous CD34+ cells transduced with the w1.6_hWASP_WPRE (VSVg) lentiviral vector  for WAS conducted in France and United Kingdom (GTG 002.07 and GTG 003. 08) 2.	Parents, guardians or patient signed informed consent 
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| E.4 | Principal exclusion criteria | 
| Parents, guardians, patients unwilling to return for follow up during the 3 years long term period | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
1- Primary safety endpoints To evaluate the incidence and type of SAEs and more specifically the incidence and nature of delayed events such as malignancies, hematologic, autoimmune events, mortality continuously over 3 years post gene therapy To evaluate the safety of the gene therapy procedure for gene transfer analysis at 3, 4 and 5 years post gene therapy: lentiviral integration sites in different cell subpopulation, quantification of VCN (vector copy numbers) on sorted cell population by real time by q-PCR To evaluate the safety of the gene therapy procedure for replication competent lentivirus (RCL) at 3, 4 and 5 years post gene therapy 
 2- Primary efficacy endpoints To evaluate the clinical status of patients: weight, ECG, and complete clinical exam at 3, 4 and 5 years post gene therapy To evaluate the evolution of the key medical events related to the WAS at 3, 4 and 5 years post gene therapy: eczema status, infections, bleeding symptoms, autoimmune manifestations. To evaluate the haematological reconstitution of the patient at 3, 4 and 5 years post gene therapy: CBC including platelet count and size. To evaluate the reconstitution of cell mediated and humoral immunity of the patient at 3, 4 and 5 years post gene therapy: immunophenotyping panel (Lymphocytes subset including Wasp protein expression), restoration of antibody production (IgA, IgM, IgG, IgE), whole blood lymphocytes proliferation assays - humoral response to antigen (PHA, Candida, CD3 stimulation). | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| 3,4 and 5 years post IMP treatment | 
 
 
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| E.5.2 | Secondary end point(s) | 
1 Secondary efficacy endpoint To evaluate the evolution of the need for associated treatments at 3, 4 and 5 years post gene therapy (Immunoglobulins, antibacterial, antifungal and antiviral drugs, transfusions). To evaluate the representation of TCR families by PCR, TREC (TCR excision circle) and TCR V beta panel. 2 Secondary safety endpoint (optional) To evaluate the bone marrow integrity at 3, 4 and 5 years post gene therapy by performing a bone marrow aspiration (optional) | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| 3,4 and 5 years post IMP treatment | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  No  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  No  | 
| E.6.7 | Pharmacodynamic |  Yes  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  No  | 
| E.8.1.1 | Randomised |  No  | 
| E.8.1.2 | Open |  Yes  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  No  | 
| E.8.1.5 | Parallel group |  No  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  No  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 0 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 2 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.7 | Trial has a data monitoring committee |  No  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 6 | 
| E.8.9.1 | In the Member State concerned months |  | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 6 |