Batten Disease Clinical Trial
Official title:
Direct CNS Administration of a Replication Deficient Adeno-associated Virus Gene Transfer Vector Serotype rh.10 Expressing the Human CLN2 cDNA to Children With Late Infantile Neuronal Ceroid Lipofuscinosis (LINCL)
This is a proposed follow up study on the investigators previous gene transfer human clinical trial entitled "Administration of a Replication Deficient Adeno-associated Virus Gene Transfer Vector Expressing the Human CLN2 cDNA to the Brain of Children with Late Infantile Neuronal Ceroid Lipofuscinosis" (Weill Cornell IRB# 0401007010). As in the previous study, the investigators propose to administer a biologic by direct gene transfer into the brain and assess its safety on children with a fatal genetic disease of the central nervous system (CNS). The disease is Late Infantile Neuronal Ceroid Lipofuscinosis (LINCL, a form of Batten disease). This will be accomplished by using delivery of a gene (method called gene transfer) to administer to the brain an experimental drug called AAVRh.10CUhCLN2, a gene transfer vector.
The investigators propose to assess a new drug to treat children with a form of Batten Disease called Late Infantile Neuronal Ceroid Lipofuscinosis (LINCL). These children are born with genetic changes called mutations in their CLN2 gene that result in the inability of the brain to properly recycle proteins. The recycling failure leads to death of the nerve cells in the brain and progressive loss of brain function. Children with Batten disease are normal at birth but by age 2 to 4 have motor and vision problems which progress rapidly to death at age approximately 10 years old. There are no therapies available to treat the disease. The experimental gene transfer procedure treatment the investigators propose consists of augmenting the abnormal gene by a good copy. A virus is used to deliver the good gene to the nerve cells. Since the disease is due to an abnormal CLN2 gene, the aim of this study is to add a normal copy of the CLN2 gene to the brain of affected children to try to reverse death of cells in the brain. Previously the investigators have used a virus called adeno-associated virus 2 (AAV2) as the gene delivery system. That study showed that viral delivery of the gene was safe. We now propose to use a slightly different virus called AAVrh.10 as a gene delivery system and use 2 different doses of the virus. Children with Batten disease will get the drug injected into the brain and will receive extensive neurological assessment at intervals to determine if the transfer slows the rate of progress of the disease. The primary aims of the study are: (1) to assess the hypothesis that direct administration of AAVrh.10CUhCLN2 to the brain of children with LINCL can be achieved safely and with minimal toxicity; and (2) to evaluate the hypothesis that direct administration of AAVrh.10CUhCLN2 to the brain of children with LINCL will slow down or halt progression of the disease as assessed by neurological rating scales and quantitative MRI (primary variables). The investigators have recently completed a study in which the normal copy of the gene was surgically delivered to 12 locations in the brain in 10 children with LINCL. The children were assessed by a number of neurological and imaging parameters prior to and after gene transfer. The data demonstrated that the gene transfer was well tolerated and had a small impact on the progression of the disease and suggested that higher doses and a better delivery system may provide greater benefit. The previous study used the viral gene transfer vector adeno-associated virus type 2 (AAV2) at a dose of 2,000,000,000,000 molecules of the drug (2 x 10^12 particle units). The investigators now propose a very similar study with delivery of the identical payload with a slightly different viral gene delivery system based on the virus AAVrh.10. ;
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