IT and IV Lentiviral Gene Therapy for X-ALD

Not Applicable

Recruiting

• Conditions: X-linked Adrenoleukodystrophy
• Interventions: Genetic: Intracerebral LV gene therapy

• Registration Number: NCT03727555
• Lead Sponsor: Shenzhen Geno-Immune Medical Institute

Brief Summary

This is a Phase I/II clinical trial of gene therapy for treating X-linked adrenoleukodystrophy using a high-safety, high-efficiency, self-inactivating lentiviral vector (LV) TYF-ABCD1 to functionally correct the defective gene. The objectives are to evaluate the safety and efficacy of the intrathecal and intravenous lentiviral gene transfer clinical protocol.

Detailed Description

X-linked adrenoleukodystrophy (X-ALD) is a devastating neurological disorder caused by mutations in the ABCD1 gene that encodes a peroxisomal ATP-binding cassette transporter (ABCD1). ABCD1 is responsible for transport of CoA-activated very long-chain fatty acids (VLCFA) into the peroxisome for degradation. X-ALD is clinically characterized with two main phenotypes: adrenomyeloneuropathy (AMN) and the inflammatory cerebral ALD. This disease presents most commonly in males. Approximately 50% of heterozygote females show some symptoms later in life. Approximately two-thirds of ALD patients will present with the childhood cerebral form of the disease, which is the most severe form. The disease is characterized by normal development in early childhood, followed by rapid degeneration to a vegetative state. ALD patients are normally treated with hematopoietic stem cell transplantation (HSCT) from a matched healthy donor. However, HSCT must be performed at a very early stage of the disease, which limits the therapeutic opportunities for juvenile or adult forms of ALD. This trial aims to treat ALD using a safety and efficiency improved self-inactivating lentiviral vector carrying a functional ABCD1 gene via intrathecal (IT) and intravenous (IV) injections to directly correct the genetic defect. This protocol targets not only early stage patients but also patients with symptoms. The direct LV injection approach aims to correct the pathologies associated with this genetic defect, and the IT and IV LV injections substantially simplify the treatment process, which reduces the risk associated with myeloablative chemotherapy during the HSCT treatment.

The objectives are to evaluate the safety of the advanced self-inactivating LV TYF-ABCD1, the direct in vivo gene transfer clinical protocol and the efficacy of the treatment, including assessment of vector distribution and the potential long-term correction of the ALD disease phenotype.

Study Timeline

• Study First Submitted: 2018-09-25
• Study Start: 2018-10-30
• Study First Submitted QC: 2018-10-31
• Study First Posted: 2018-11-01
• Status Verified: 2024-12
• Primary Completion: 2024-12-30
• Last Update Submitted: 2024-12-30
• Last Update Posted: 2024-12-31
• Study Completion: 2028-12-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

1. X-ALD patients ≥ 1 year of age
2. ALD diagnosis of the brain: evaluation of the VLCFA value in plasma
3. Central imaging of the MRI to examine the damage on the CNS.
4. Neurological function score (NFS) ≥ 1
5. Parent / guardian / patient signing informed consent
6. Patients and their families have a strong willingness to participate in clinical trials, and are willing to bear all the consequences caused by the failure of the trial, and sign an informed consent form

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Exclusion Criteria

1. HIV positive patients
2. Stablized condition after statins, Lorenzo's oil, or diet to reduce VLCFA levels
3. Patients who are experiencing severe viral, bacterial or fungal infections, malignant tumors, heart abnormalities, liver dysfunction, or renal insufficiency
4. Cannot perform an MRI
5. Infection or dermatosis at pre-injection site

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Lentivirus-mediated delivery of ABCD1 to the CNS.	Intracerebral LV gene therapy	Intracerebral injection with lentiviral TYF-ABCD1 vector carrying the functional gene

Primary Outcome Measures

Name	Time	Method
Safety evaluation of IT and IV injections of lentiviral TYF-ABCD1, determined by number of participants with treatment-related adverse events (AEs), according to scheduled assessments, vital signs, & physical examinations as assessed by CTCAE v4.0.	Minimum 1 day, maximum 1 year follow up	Safety of direct IT and IV injections of lentiviral TYF-ABCD1, determined by number of participants with treatment-related adverse events (AEs), according to scheduled assessments, vital signs, \& physical examinations as assessed by CTCAE v4.0. AEs \& clinically significant abnormalities (meeting grade 3, 4, or 5 criteria according to CTCAE) will be summarized by maximum intensity \& relationship to study drug(s). Grade 1 \& 2 AEs will be summarized if related to study therapy.
Altered disease progression	Minimum 6 months, maximum 3 year follow up	Altered disease progression based on biochemicaland neurological analysis.
Assess disease progression	Minimum 6 months, maximum 3 year follow up	Assess disease progression based on MRI brain imaging analysis.

Trial Locations

Locations (1)

Shenzhen Geno-immune Medical Institute; 🇨🇳 Shenzhen, Guangdong, China