Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Diabetic Polyneuropathy
Conditions
Keywords
Diabetic neuropathy, Diabetes Type 1 or 2, Moderate to severe sensorimotor diabetic polyneuropathy, Unmeasurable nerve conduction velocity
Brief summary
The purpose of the study is to study the clinical effects of the investigational drug, SB-509 versus placebo in patients with diabetic neuropathy.
Detailed description
SB-509 contains the gene (DNA-a kind of biological blueprint) for a protein. When a researcher injects SB-509 into your legs, the drug enters the muscle and nerve cells around the injection site and causes these cells to make a protein. This protein causes your cells to increase production of another protein called vascular endothelial growth factor (VEGF), which may improve the structure and function of nerves. In addition, there are changes in the levels of 28 additional proteins in your cells. These proteins function to promote the growth of cells, are structures in cells, help synthesize products, and affect immune cells, and some have unknown functions. This increase in your own VEGF proteins may protect and repair the damaged nerves caused by diabetic neuropathy.
Interventions
BIOLOGICALSB-509
60 mg dose
OTHERPlacebo
Saline
Sponsors
Sangamo Therapeutics
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
Key Inclusion Criteria: * Have a clinical diagnosis of diabetes mellitus type I or II for at least 12 months prior to the study. * Have received a diagnosis of moderate to severe sensorimotor diabetic neuropathy from a neurologist (a doctor who specializes in disorders of the nervous system) or endocrinologist (a doctor who specializes in diabetes). This type of neuropathy is a loss of sensation and muscle function that occurs in the legs and hands in a stocking and glove distribution. Subjects with diabetic neuropathy that results in loss of sensation or muscle function in only one nerve and results in loss of nerve function of the blood vessels and causes low blood pressure, will not be eligible. * Unmeasurable nerve conduction velocity in any lower extremity nerve: peroneal, tibial or sural due to diabetic polyneuropathy * If female and of childbearing potential, agree to use a medically acceptable physical barrier method during the study. * Have blood pressure \< 140/90 mm Hg * Body mass index (BMI) \< 38 kg/m2 Key
Exclusion criteria
Subjects with the following are NOT eligible to participate in this study: * Have moderate to severe ischemic heart disease, any history of congestive heart failure, or have had a myocardial infarction (heart attack) within the previous 6 months. * Have chronic foot or leg ulcers for \>1 month, gangrene in the legs, or any previous amputation of the lower extremity. * Have a history of cancer within the past 5 years (except for curable non-melanoma cancer of the skin, superficial bladder cancer in complete remission, or any other cancer that has been in complete remission for at least 5 years). * Have colon polyps. If patients have a history of benign colonic polyps that have been removed, they must have evidence of a normal colonoscopy within the last 12 months. * Require any drug that depresses patients' immune systems (such as methotrexate, cyclophosphamide, or cyclosporine) when they receive the study drug and for 30 days afterwards. * Have a known disorder that affects patients' immune systems (such as HIV/AIDS, hepatitis B virus \[HBV\], hepatitis C virus \[HCV\], sarcoidosis, tuberculosis, rheumatoid arthritis, or autoimmune disorders).
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Total Neuropathy Score (TNS),Evoked nerve conduction velocity (NCV), Quantitative Sensory Testing (QST), %of subjects with conversion of unmeasurable to measurable NCV and NIS-LL | One year |
Secondary
| Measure | Time frame |
|---|---|
| Safety | One year |
Countries
Mexico, United States
Outcome results
None listed