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Sangamo BioSciences Announces Presentation of Phase 1 ZFP,Therapeutic Data at American Diabetes Association Meeting

o-controlled, repeat-dosing study designed to evaluate the clinical safety and clinical effects of repeat administration of SB-509 in diabetics with mild to moderate diabetic peripheral sensory motor neuropathy in the legs. The trial will be conducted at multiple sites.

Approximately 100 subjects will be enrolled into the trial. Subjects will be randomized to one of two groups in a 2:1 ratio. The larger group (approximately 66 subjects) will be treated by intramuscular injection of 60 mg of SB-509 (30 mg of SB-509 per leg) into the lower limb every 2 months. The remaining group (approximately 33 subjects) will receive an equal volume of placebo on the same schedule. Each subject will receive a total of three treatments (Day 0, 60 and 120). Subjects will receive injections in a distribution pattern that targets the major peripheral nerves in the legs and feet.

The symptoms of diabetic peripheral neuropathy and any changes that occur during the trial will be evaluated based on neurological examination data, electrophysiological testing data, subject neurological questionnaire, and subject pain assessment. Specifically, investigators will use the following tests: the visual analog scale for pain intensity (VASPI), total neuropathy score (TNS) to assess signs and symptoms of the condition. A composite scoring system is widely regarded by neurologists as the most comprehensive approach to evaluating changes in nerve health. In addition to qualitative assessment of symptoms, the TNS includes electrophysiological testing using nerve conduction velocity (NCV) to assess the rate at which a nerve can conduct an electrical signal, and quantitative sensory testing (QST) with the Vibratron II instrument, to assess the threshold of detection of vibration. In addition, skin biopsies will be taken to evaluate the direct therapeutic effect of SB-509 on nerve regrowth. This test is a very sensitive marker of DN severity and may provide an important mechanistic marker fo
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