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Neurologix announces positive results of gene therapy clinical trial in Parkinson's disease

e-escalation study with four patients in each of three escalating dose cohorts. The third cohort of four patients received 10 times the dose of the first cohort. The 12 patients participating in the trial were diagnosed with severe Parkinson's disease of at least five years' duration and no longer adequately responded to current medical therapies.

Following treatment, patients were evaluated at 1, 3, 6 and 12 months. These evaluations included scoring via the UPDRS, neuropsychological testing, videotaped examinations and timed motor tasks. PET scans were also taken at baseline, 6 and 12 months.

The Gene Therapy Procedure

The surgery entailed a stereotactic neurosurgical procedure performed under local anesthesia with the patient awake. First, MRI was used to image the target subthalamic nucleus (STN) region of the brain. The STN was mapped using microelectrodes by recording from single neurons as the electrode was slowly moved towards the STN. Once a signature firing pattern was obtained confirming that the electrode was in the STN, the fine-wire electrode was removed, leaving only the microelectrode sheath through which a hair-thin (165 micron) hollow tube was inserted. Thirty-five microliters containing 3.5, 10 or 35 billion particles (depending upon dose cohort) of the AAV (adeno-associated virus) viral vector with a human GAD gene (cDNA) were then infused at 0.5 microliters/minute, together with 15 microliters of 25% mannitol. After the 100-minute infusion period, the delivery catheter was withdrawn and the incision closed. No hardware was left behind following this procedure, and all patients were discharged within 48 hours of the procedure.

About Neurologix

Neurologix, Inc. is a development-stage company, which through its subsidiary, Neurologix Research, Inc., is engaged in the research and development of proprietary treatments for disorders of the brain and central nervous system, primarily uti
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Source:jjackson@burnsmc.com


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