E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
metachromatic leukodystrophy |
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MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 9.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10024381 |
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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 |
Evaluation of the safety of gene therapy in MLD patients, considering both the conditioning regimen safety and the safety of LV-transduced cell infusion, short and long-term after the treatment. Evaluation of the efficacy of gene therapy, assessed as reduction in the progression of the clinical motor impairment in treated patients as compared to the progression measured in untreated MLD patients in our disease natural history study, accompanied by a significant increase of residual ARSA activity as compared to pre-treatment patients values. Motor functions will be measured by the clinically relevant GMFM scoring system. Indeed, there is a clear causal relationship between the potential beneficial outcome meas-ured with the GMFM and the treatment, being motor impairment consequent to the involvement of both central and peripheral nervous system, and less influenced by other variables. Residual ARSA activity will be measured on hematopoietic cells (PBMC and BM cells). |
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E.2.2 | Secondary objectives of the trial |
Evaluation of the efficacy of the procedure in reducing the progression of demyelination (and atrophy) in the central and peripheral nervous system in comparison with that documented in our historical controls, as assessed by validated instrumental parameters brain MR score and NCV Index at ENG recordings (see secondary efficacy end-points). Evaluation of the biological efficacy of the procedure in treated patients, which consists in the sustained engraftment of the transduced cells, essential prerequisite for achieving clinical benefit. Long-term transduced cell engraftment will prove that i) ARSA LV transduced HSC with long-term repopulation potential and ii) the conditioning regimen was adequate for allowing transduced cell engraftment. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Pre-symptomatic late infantile patients; Pre- or early-symptomatic early juvenile patients; Parental/guardian/patient signed informed consent. |
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E.4 | Principal exclusion criteria |
Patients will be excluded from the present study according to the following crite-ria: HIV-positive patients; Patients affected by neoplastic diseases; Patients with cytogenetic alterations typical of MDS/AML; Patients with end-organ functions or any other severe disease which, in the judgment of the investigator, would make the patient inappropriate for entry into this study; Patients enrolled in other trials; Patients who underwent allogeneic hematopoietic stem cell transplantation in the previous 6 months; Patients who underwent allogeneic hematopoietic stem cell transplantation with evidence of residual cells of donor origin. |
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E.5 End points |
E.5.1 | Primary end point(s) |
Safety Primary endpoints ; Conditioning regimen related safety, consisting in the absence of engraftment failure or delayed hematological reconstitution (prolonged aplasia) and surveillance of non-hematological regimen related toxicity (for clinical toxicity NCI Common Toxicity Criteria > 2; for laboratory toxicity NCI Common Toxicity Criteria > 3). Safety of LV-transduced cell infusion, defined as: a)short-term safety and tolerability of lentiviral-transduced cell infusion; b)long-term safety of lentiviral-transduced cell infusion (absence of Replication Competent Lentivirus (RCL) and abnormal clonal proliferations). Efficacy Primary endpoints : An improvement of 10% of the total score at gross motor function measure (GMFM) at comparison with the GMFM scores obtained by aged matched untreated MLD patients, evaluated 24 months after treatment; A significant (2 SD) increase of Arylsulfatase A (ARSA) activity as com-pared to pre-treatment values, measured in hematopoietic cells 24 months after 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 | No |
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) | Yes |
E.7.1.1 | First administration to humans | Yes |
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) | No |
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 | Yes |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | No |
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) | Information not present in EudraCT |
E.8.2.2 | Placebo | Information not present in EudraCT |
E.8.2.3 | Other | Information not present in EudraCT |
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.8.4.1 | Number of sites anticipated in Member State concerned | 1 |
E.8.5 | The trial involves multiple Member States | No |
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 | Information not present in EudraCT |
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 | 5 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | 0 |
E.8.9.2 | In all countries concerned by the trial years | 5 |
E.8.9.2 | In all countries concerned by the trial months | 0 |
E.8.9.2 | In all countries concerned by the trial days | 0 |