Gene Transfer Therapy for Treating Children and Adults With Limb Girdle Muscular Dystrophy Type 2D (LGMD2D)
Study Details
Study Description
Brief Summary
Limb girdle muscular dystrophy type 2D (LGMD2D) is a genetic disease that affects skeletal muscle. Insufficient levels of the protein alpha-sarcoglycan result in muscle weakness that worsens over time. The purpose of this study is to evaluate the safety and effectiveness of gene therapy in treating children and adults with LGMD2D.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
Phase 1 |
Detailed Description
The primary objective of this study is the assessment of the safety of intramuscular administration to alpha-sarcoglycan deficient subjects of recombinant adeno-associated virus serotype 1 (rAAV1)-human alpha-sarcoglycan gene (hαSG) vector under control of a skeletal muscle creatine kinase promoter. The secondary objective is to determine the dose of rAAV1.tMCK.hαSG vector required to achieve a detectable level of alpha-sarcoglycan in muscle of subjects with this disorder.
A recombinant virus vector constructed from AAV1 has been altered to carry the human alpha-sarcoglycan gene expressed from a tMCK promoter. The construct has been shown to initiate the production of a functional alpha-sarcoglycan protein in laboratory animals. This construct can reverse the dystrophic phenotype in the alpha-sarcoglycan knock out mouse, a laboratory animal model for the clinical disorder. Intramuscular injection of rAAV1 restores muscle histology to normal and increases muscle strength to levels exceeding control knock out mice but not to the same degree as wild-type mice.
The proposed human clinical trial is a phase I, double-blind randomized protocol with injection of rAAV1.tMCK.hαSG gene vector into muscle. Two cohorts of subjects with LGMD2D(alpha-sarcoglycan deficiency), each with proven mutations will undergo gene transfer. A minimum of three subjects will be enrolled into each cohort. The first cohort will receive a total of 1.5 ml volume of study agent in two to six separate injections into the selected muscle (extensor digitorum brevis) or other muscle if more appropriate considering the individual patient) with a dose of 3.25 X 10 to the 11 vg in 1.5 ml. The anatomical midline point of the muscle will be identified on the skin and 2 to 6 vector injections will be distributed in the direction of an X. The second cohort will receive the same dose delivered to muscle according to the same paradigm. In each cohort, only one extremity will receive vector with transgene while the opposite extremity will be injected with placebo. On the day of the vector infusion, 4 hours before gene transfer, patients will receive intravenous methylprednisolone 2.0 mg/kg (not to exceed 1 gm total), with repeat doses on two consecutive mornings. The methylprednisolone is specifically given to diminish the immediate inflammation from the needle injection, which is known to arouse an inflammatory reaction and could contribute to bringing antigen presenting cells to the site of vector delivery. We have previously demonstrated that this treatment enhances gene expression by at least 2-fold (Included as part of BB-IND-12936 for minidystrophin gene transfer).
Safety endpoints to be assessed include inflammatory reaction to the vector, as evaluated by muscle biopsy, and changes in hematology, serum chemistry, urinalysis, immunologic responses to rAAV1 and alpha-sarcoglycan, and reported history and observations of symptoms. The patient will have 10 to 12 follow-up visits for the next 2 years after the initial infusion.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: 1 The first cohort will receive a total of 1.5 ml volume of study agent in two to six separate injections into the selected muscle (extensor digitorum brevis) or other muscle if more appropriate upon considering the individual patient. The dose will be 3.25 X 10 to the 11 vg in 1.5 ml. The anatomical midline point of the muscle will be identified on the skin and two to six vector injections will be distributed in the direction of an X. In each cohort, only one extremity will receive vector with transgene while the opposite extremity will be injected with placebo. |
Genetic: rAAV1.tMCK.human-alpha-sarcoglycan- First cohort
The first cohort of subjects with LGMD2D (alpha-sarcoglycan deficiency) and proven mutations will undergo gene transfer with a minimum of three subjects enrolled into this cohort and will receive a total of 1.5 ml volume of study agent in two to six separate injections into the selected muscle (extensor digitorum brevis) or other muscle if more appropriate upon considering the individual patient. The dose will be 3.25 X 10 to the 11 vg in 1.5 ml.
In each cohort, only one extremity will receive vector with transgene while the opposite extremity will be injected with placebo.
Other Names:
|
| Experimental: 2 The second cohort will receive the same dose of 3.25 X 10 to the 11 vg in 1.5 ml delivered to muscle according to the same paradigm. In each cohort, only one extremity will receive vector with transgene while the opposite extremity will be injected with placebo. |
Genetic: Genetic: rAAV1.tMCK.human-alpha-sarcoglycan- Second cohort
The second cohort will receive the same dosis of 3.25 X 10 to the 11 vg in 1.5 ml delivered to muscle according to the same paradigm. In each cohort, only one extremity will receive vector with transgene while the opposite extremity will be injected with placebo.
Other Names:
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Outcome Measures
Primary Outcome Measures
- Safety of AAV1.tMCK.human-alpha-sarcoglycan gene transfer via intramuscular injection to the EDB muscle [Measured throughout the study]
Secondary Outcome Measures
- Human-alpha-sarcoglycan gene expression at the site of gene transfer via muscle biopsy [First cohort: Measured 45 days for two patients and at 90 days after gene transfer for one patient; Second cohort: Measured at 6 months after gene transfer for the three patients]
- Muscle strength of the gene transferred muscle via maximal volume isometric contraction testing (MVICT) if selected muscle is suitable for strenght testing [Measured 45 or 90 days after gene transfer in the first cohort, or 6 months post-gene transfer in second cohort depending on muscle biopsy date]
Eligibility Criteria
Criteria
Inclusion Criteria:
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Six LGMD2D subjects ages 5 and older based on the clinical degree of involvement (impaired muscle function/weakness, sufficient muscle preservation)
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Preservation of EDB muscle or another muscle if judged more favorable because of adequate muscle mass for gene transfer
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Males and females of any ethnic group
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Established mutations of an -SG gene on both alleles
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Ability to cooperate for testing
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Sexually active patients must be willing to practice a reliable method of contraception during the study
Exclusion Criteria:
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Active viral infection (symptoms listed in section 9.0 of the protocol)
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LGMD2D subjects without weakness or functional loss
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Cardiomyopathy based on clinical exam and ECHO with ejection fraction less than 40%
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HIV infected
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Hepatitis A, B, or C infected
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Autoimmune diseases and immunosuppressive drugs (other than pulse methylprednisolone at time of gene transfer)
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Persistent leucopenia or leucocytosis (WBC less than or equal to 3.5 K/cu mm or at least 20.0 K/ cu mm) or neutrophils less than 1.5 K/ cu mm
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Concomitant illness or requirement for chronic drug treatment that in the opinion of the Principal Investigator creates unnecessary risks for gene transfer
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Pregnancy
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Abnormal laboratory values considered clinically significant
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Alcoholism (CAGE questionnaire), and laboratory tests such as GGT and MCV
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | The Research Institute at Nationwide Children's Hospital | Columbus | Ohio | United States | 43205 |
Sponsors and Collaborators
- Nationwide Children's Hospital
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
- Muscular Dystrophy Association
Investigators
- Principal Investigator: Jerry R. Mendell, MD, The Research Institute at Nationwide Children's Hospital
Study Documents (Full-Text)
None provided.More Information
Additional Information:
- Click here for the Nationwide Children's Hospital Web site
- Click here for the Muscular Dystrophy Association Web site
Publications
- Allamand V, Donahue KM, Straub V, Davisson RL, Davidson BL, Campbell KP. Early adenovirus-mediated gene transfer effectively prevents muscular dystrophy in alpha-sarcoglycan-deficient mice. Gene Ther. 2000 Aug;7(16):1385-91.
- Bueno MR, Moreira ES, Vainzof M, Chamberlain J, Marie SK, Pereira L, Akiyama J, Roberds SL, Campbell KP, Zatz M. A common missense mutation in the adhalin gene in three unrelated Brazilian families with a relatively mild form of autosomal recessive limb-girdle muscular dystrophy. Hum Mol Genet. 1995 Jul;4(7):1163-7.
- Büning H, Nicklin SA, Perabo L, Hallek M, Baker AH. AAV-based gene transfer. Curr Opin Mol Ther. 2003 Aug;5(4):367-75. Review.
- Rodino-Klapac LR, Lee JS, Mulligan RC, Clark KR, Mendell JR. Lack of toxicity of alpha-sarcoglycan overexpression supports clinical gene transfer trial in LGMD2D. Neurology. 2008 Jul 22;71(4):240-7. doi: 10.1212/01.wnl.0000306309.85301.e2. Epub 2008 Jun 4.
- 5U54AR050733
- U54AR050733
- 5U54AR050733
- IRB07-00329