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Clinical Trial of SB-509 in Subjects With Diabetic Neuropathy

Primary Purpose

Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Diabetic Polyneuropathy

Status
Completed
Phase
Phase 2
Locations
United States
Study Type
Interventional
Intervention
SB-509
Saline
Sponsored by
Sangamo Therapeutics
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Diabetes Mellitus, Type 1 focused on measuring Diabetic neuropathy, Diabetes Type 1 or 2, Moderately severe sensorimotor diabetic polyneuropathy

Eligibility Criteria

18 Years - 80 Years (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Key Inclusion Criteria:

  • Clinical diagnosis of Diabetes Mellitus Type I or II for at least 12 months
  • Clinical signs and symptoms of moderate to severe diabetic sensory-motor polyneuropathy of the lower extremities for at least 6 months that are not otherwise attributed to an etiology other than diabetes
  • Measurable sural and peroneal response bilaterally
  • HgbA1C level ≤ 10%
  • LDL cholesterol ≤ 160 mg/dL
  • Blood pressure ≤ 140/90 mm Hg
  • Body mass index (BMI) ≤ 38

Key Exclusion Criteria:

  • Moderate to severe ischemic heart disease or any history of congestive heart failure, or have had a myocardial infarction within the previous 6 months
  • Evidence of cardiac enlargement and/or congestive heart failure
  • Current diabetic foot or leg ulcer, gangrene in the lower extremity, or any amputation of the lower extremity
  • History of malignancy, except for the following: adequately treated basal cell or squamous cell skin cancer, superficial bladder cancer, adequately treated Stage 1 or 2 cancer currently in complete remission, or any other cancer that has been in complete remission for at least 5 years
  • Immune or immunodeficiency disorders or expected to require immunosuppressants for 30 days prior to, during, and for 30 days following administration of the investigational drug product
  • History of or current proliferative retinopathy, macular edema or retinal neovascularization
  • Pre-cancerous conditions or benign tumors which have the potential for clinically significant growth due to VEGF stimulation
  • Family history of inherited neuropathy (e.g. Charcot Marie Tooth, Hereditary Predisposition to Pressure Palsy)

Sites / Locations

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Placebo Comparator

Arm Label

SB-509

Placebo

Arm Description

Saline

Outcomes

Primary Outcome Measures

To compare the effect of SB-509 versus placebo in subjects with moderately severe diabetic neuropathy (DN) on sural Nerve Conduction Velocity (NCV) at six-months

Secondary Outcome Measures

To evaluate the effect of SB-509 on Neuropathy Impairment Score - Lower Limb (NIS-LL), motor Nerve Conduction Velocity (NCV), Quantitative Sensory Testing (QST), Intraepidermal Nerve Fiber Density (IENFD), and Lower Extremity Neurological Sensory Exam
To evaluate the effect of SB-509 using a multi-endpoint analysis that includes NIS-LL, Sural NCV, and IENFD
To evaluate the safety of SB-509 in subjects with moderately severe diabetic neuropathy

Full Information

First Posted
March 2, 2010
Last Updated
May 20, 2022
Sponsor
Sangamo Therapeutics
Collaborators
Juvenile Diabetes Research Foundation
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1. Study Identification

Unique Protocol Identification Number
NCT01079325
Brief Title
Clinical Trial of SB-509 in Subjects With Diabetic Neuropathy
Official Title
A Phase 2b Repeat Dosing Clinical Trial of SB-509 in Subjects With Moderately Severe Diabetic Neuropathy
Study Type
Interventional

2. Study Status

Record Verification Date
May 2022
Overall Recruitment Status
Completed
Study Start Date
November 2009 (undefined)
Primary Completion Date
May 2015 (Actual)
Study Completion Date
April 2016 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Sangamo Therapeutics
Collaborators
Juvenile Diabetes Research Foundation

4. Oversight

Data Monitoring Committee
No

5. Study Description

Brief Summary
The purpose of the study is to evaluate the clinical effects of the investigational drug, SB-509, in subjects 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 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.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Diabetic Polyneuropathy
Keywords
Diabetic neuropathy, Diabetes Type 1 or 2, Moderately severe sensorimotor diabetic polyneuropathy

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 2
Interventional Study Model
Parallel Assignment
Masking
ParticipantCare ProviderInvestigator
Allocation
Randomized
Enrollment
170 (Actual)

8. Arms, Groups, and Interventions

Arm Title
SB-509
Arm Type
Experimental
Arm Title
Placebo
Arm Type
Placebo Comparator
Arm Description
Saline
Intervention Type
Drug
Intervention Name(s)
SB-509
Intervention Description
SB-509 60 mg, 3 treatments, and 5 months treatment period
Intervention Type
Other
Intervention Name(s)
Saline
Other Intervention Name(s)
30 ml saline, 3 treatments
Primary Outcome Measure Information:
Title
To compare the effect of SB-509 versus placebo in subjects with moderately severe diabetic neuropathy (DN) on sural Nerve Conduction Velocity (NCV) at six-months
Time Frame
6 months
Secondary Outcome Measure Information:
Title
To evaluate the effect of SB-509 on Neuropathy Impairment Score - Lower Limb (NIS-LL), motor Nerve Conduction Velocity (NCV), Quantitative Sensory Testing (QST), Intraepidermal Nerve Fiber Density (IENFD), and Lower Extremity Neurological Sensory Exam
Time Frame
12 months
Title
To evaluate the effect of SB-509 using a multi-endpoint analysis that includes NIS-LL, Sural NCV, and IENFD
Time Frame
12 months
Title
To evaluate the safety of SB-509 in subjects with moderately severe diabetic neuropathy
Time Frame
12 months

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Maximum Age & Unit of Time
80 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Key Inclusion Criteria: Clinical diagnosis of Diabetes Mellitus Type I or II for at least 12 months Clinical signs and symptoms of moderate to severe diabetic sensory-motor polyneuropathy of the lower extremities for at least 6 months that are not otherwise attributed to an etiology other than diabetes Measurable sural and peroneal response bilaterally HgbA1C level ≤ 10% LDL cholesterol ≤ 160 mg/dL Blood pressure ≤ 140/90 mm Hg Body mass index (BMI) ≤ 38 Key Exclusion Criteria: Moderate to severe ischemic heart disease or any history of congestive heart failure, or have had a myocardial infarction within the previous 6 months Evidence of cardiac enlargement and/or congestive heart failure Current diabetic foot or leg ulcer, gangrene in the lower extremity, or any amputation of the lower extremity History of malignancy, except for the following: adequately treated basal cell or squamous cell skin cancer, superficial bladder cancer, adequately treated Stage 1 or 2 cancer currently in complete remission, or any other cancer that has been in complete remission for at least 5 years Immune or immunodeficiency disorders or expected to require immunosuppressants for 30 days prior to, during, and for 30 days following administration of the investigational drug product History of or current proliferative retinopathy, macular edema or retinal neovascularization Pre-cancerous conditions or benign tumors which have the potential for clinically significant growth due to VEGF stimulation Family history of inherited neuropathy (e.g. Charcot Marie Tooth, Hereditary Predisposition to Pressure Palsy)
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Winson Tang, MD
Organizational Affiliation
Sangamo BioSciences, Inc
Official's Role
Study Director
Facility Information:
City
Phoenix
State/Province
Arizona
Country
United States
City
Scottsdale
State/Province
Arizona
Country
United States
City
Tucson
State/Province
Arizona
Country
United States
City
Chino
State/Province
California
Country
United States
City
Fresno
State/Province
California
Country
United States
City
La Jolla
State/Province
California
Country
United States
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Los Angeles
State/Province
California
Country
United States
City
National City
State/Province
California
Country
United States
City
San Francisco
State/Province
California
Country
United States
City
Walnut Creek
State/Province
California
Country
United States
City
Boulder
State/Province
Colorado
Country
United States
City
DeLand
State/Province
Florida
Country
United States
City
Fort Myers
State/Province
Florida
Country
United States
City
Miami
State/Province
Florida
Country
United States
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Orlando
State/Province
Florida
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United States
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Tampa
State/Province
Florida
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United States
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West Palm Beach
State/Province
Florida
Country
United States
City
Idaho Falls
State/Province
Idaho
Country
United States
City
Meridian
State/Province
Idaho
Country
United States
City
Lexington
State/Province
Kentucky
Country
United States
City
Boston
State/Province
Massachusetts
Country
United States
City
Kansas City
State/Province
Missouri
Country
United States
City
Las Vegas
State/Province
Nevada
Country
United States
City
Winston-Salem
State/Province
North Carolina
Country
United States
City
Tulsa
State/Province
Oklahoma
Country
United States
City
Greer
State/Province
South Carolina
Country
United States
City
Dallas
State/Province
Texas
Country
United States
City
Houston
State/Province
Texas
Country
United States
City
San Antonio
State/Province
Texas
Country
United States
City
Salt Lake City
State/Province
Utah
Country
United States
City
Norfolk
State/Province
Virginia
Country
United States

12. IPD Sharing Statement

Links:
URL
http://www.sangamo.com
Description
Related Info

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Clinical Trial of SB-509 in Subjects With Diabetic Neuropathy

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