Lentiviral Hematopoietic Stem Cell Gene Therapy for MLD

Last updated: June 23, 2025
Sponsor: Shenzhen Geno-Immune Medical Institute
Overall Status: Active - Recruiting

Phase

N/A

Condition

Multiple Sclerosis

Treatment

Lentiviral TYF-ARSA correction of patient's autologous HSCs

Clinical Study ID

NCT07046338
GIMI-IRB-25001
  • Ages 1-50
  • All Genders

Study Summary

This is a Phase I/II clinical trial of gene therapy for treating Metachromatic leukodystrophy (MLD) using a safety and efficacy improved self-inactivating lentiviral vector TYF-ARSA to transduce patient-derived hematopoietic stem cells (HSCs), with the goal of achieving therapeutic gene correction through transplantation of genetically modified HSCs. The primary objectives are to evaluate the safety and efficacy of the gene therapy clinical protocol.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  1. age >= 1 month

  2. ARSA gene sequence analysis to confirm MLD mutations

  3. Brain MR Imaging

  4. Parent / guardian / patient signing informed consent

  5. Patients and their families have a strong willingness to participate in clinicaltrials, are willing to bear all the consequences caused by the failure of the trial,and sign the informed consent

Exclusion

Exclusion Criteria:

  1. HIV positive

  2. Experiencing uncontrolled viral, bacterial or fungal infections, malignant tumors,heart abnormalities, liver dysfunction, or renal insufficiency

  3. Cannot perform an MRI

  4. Infection or dermatosis at infusion site

  5. Any condition that may increase the subject's risk or interfere with the results ofthe trial, e.g. in addition to MLD, there are other neurological disorders.

Study Design

Total Participants: 10
Treatment Group(s): 1
Primary Treatment: Lentiviral TYF-ARSA correction of patient's autologous HSCs
Phase:
Study Start date:
June 01, 2025
Estimated Completion Date:
September 30, 2030

Study Description

Metachromatic leukodystrophy (MLD) is a rare lysosomal storage disease. This disease is an inherited single gene autosomal recessive defect. MLD is caused by a mutation in the ARSA gene encoding arylsulfatase A which leads to a deficiency in sulfatide degradation, resulting in its accumulation in oligodendrocytes, Schwann cells and neurons. A critical level of sulfatide storage can trigger demyelination, the hallmark of MLD, which results in multiple neurological symptoms. MLD has different onset ages including late infancy (1-2 years), adolescence (4 years-before sexual maturity) and adulthood (after sexual maturity). MLD patients are normally rescued by hematopoietic stem cell transplantation (HSCT) from a matched healthy donor. However, HSCT must be performed at a very early stage of the disease and carries a significant risk of graft-versus-host disease (GVHD), which restricts its therapeutic opportunities in MLD patients. This trial aims to treat MLD using an improved self-inactivating lentiviral vector (LV) carrying a functional ARSA gene to transduce patient-derived HSCs in culture, then delivering these genetically corrected HSCs carrying the normal ARSA gene to correct the genetic defect. The primary objectives are to evaluate the safety of the improved LV TYF-ARSA and the clinical protocol for gene therapy using the genetically modified HSCs, and the therapeutic efficacy in patients after treatment, assessment of vector integration sites, and finally the long-term correction of the pathological symptoms.

Connect with a study center

  • Shenzhen Geno-Immune Medical Institute

    Shenzhen, Guangdong 518000
    China

    Active - Recruiting

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