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Safety of Autologous Human Schwann Cells (ahSC) in Subjects With Subacute SCI

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01739023
Recruitment Status : Completed
First Posted : November 30, 2012
Last Update Posted : March 5, 2019
The Miami Project to Cure Paralysis
Information provided by (Responsible Party):
W. Dalton Dietrich, University of Miami

Brief Summary:

The purpose of this study is to assess the safety of autologous human Schwann cells (ahSC) transplantation in subjects with subacute SCI.

For humans with subacute SCI, we hypothesize that axons might show improved function if myelin repair is induced with the implantation of ahSC. In addition spinal cord cavitation may be reduced, and neural sprouting and plasticity may be enhanced via neurotrophic effects.

Condition or disease Intervention/treatment Phase
Spinal Cord Injury Paraplegia Biological: Autologous Human Schwann Cells Phase 1

Expanded Access : An investigational treatment associated with this study is no longer available outside the clinical trial.   More info ...

Detailed Description:

Schwann cells are excellent candidates for transplantation into humans with SCI. Large numbers of ahSC can be derived for autologous implantation after a minor surgery for peripheral nerve harvesting, and purification and expansion of the cells in culture. Autologous cells offer important safety advantages that include no need for immune suppression, minimal risk of disease transfer, and a low risk of tumorigenicity.

Since 1990, scientists at the Miami Project to Cure Paralysis have generated extensive preclinical data suggesting Schwann cell transplantations are successful in rodents with SCI. The most recent work has focused on contusive injury models that are relevant to human injury. They have also been largely responsible for developing an efficient method for procuring large, essentially pure populations of human Schwann cells from adult peripheral nerve.

The rationale for implantation of ahSC in people with acute SCI is based on the evidence that Schwann cells are neuroprotective and are capable of myelinating axons. Using mitogen expanded human Schwann cells in SCID mice and athymic female nude rats demonstrated that human Schwann cells can survive and are capable of enhancing axonal regeneration and forming myelin after transplantation in animals with sciatic nerve transection or thoracic spinal cord transection. The proposed clinical trial will advance knowledge about the safety and feasibility of a cell-based treatment strategy for human SCI.

This Phase 1 clinical trial will employ an open label, unblinded, nonrandomized and non-placebo controlled dose-escalation design to evaluate the safety of transplantation of ahSC transplantation in subjects with subacute SCI.

A sural nerve harvest will occur within 30 days post-injury. Standard-of-care medical treatment and rehabilitation will proceed while the cells are being processed in a cGMP facility. No later than 72 days post-injury, the ahSC product will be administered via a single injection into the cavity of the spinal cord lesion.

Safety and efficacy assessments will be performed at week 1 and 2 post-transplantation and 2, 6, and 12 months post-transplantation.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 9 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: The Safety of Autologous Human Schwann Cells (ahSC) in Subjects With Subacute Spinal Cord Injury (SCI)
Study Start Date : November 2012
Actual Primary Completion Date : August 2016
Actual Study Completion Date : August 2016

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Autologous Human Schwann Cells Biological: Autologous Human Schwann Cells
Schwann cells harvested from the sural nerve of the participant will be autologously transplanted into the epicenter of the participant's spinal cord injury.

Primary Outcome Measures :
  1. International Standards of Neurological Classification for Spinal Cord Injury [ Time Frame: Change from Baseline at 12 months ]
  2. MRI of spinal cord [ Time Frame: Change from Baseline at 12 months ]
  3. Neuropathic pain [ Time Frame: Change from Baseline at 12 months ]

Secondary Outcome Measures :
  1. Spinal Cord Independence Measure III [ Time Frame: Change from Baseline at 12 months ]
  2. Functional Independence Measure [ Time Frame: Change from Baseline at 12 months ]
  3. Motor Evoked Potentials [ Time Frame: Change from Baseline at 12 months ]
  4. Somatosensory Evoked Potentials [ Time Frame: Change from Baseline at 12 months ]
  5. Autonomic - Head-up Tilt [ Time Frame: Change from Baseline at 12 months ]
  6. Autonomic - Sympathetic Skin Response [ Time Frame: Change from Baseline at 12 months ]
  7. ISCI Basic Bowel Dataset [ Time Frame: Change from Baseline at 12 months ]
  8. ISCI Basic Lower Urinary Tract Dataset [ Time Frame: Change from Baseline at 12 months ]
  9. SF-12 [ Time Frame: Change from Baseline at 12 months ]
  10. Patient Global Impression of Change [ Time Frame: Change from Baseline at 12 months ]
  11. Modified Ashworth Scale [ Time Frame: Change from Baseline at 12 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • 1) Persons with traumatic SCI that occurred within the previous 30 days.
  • 2) Between the ages of 18 and 60 at last birthday.
  • 3) SCI at a thoracic level between T3-T11 as defined by MRI and the most caudal level of intact motor and sensory function on the International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI).
  • 4) Acute SCI with ISNCSCI grade A impairment at time of enrollment.

Exclusion Criteria:

  • 1) Persons with penetrating injury of the spinal cord or complete transection of the cord, including bone fragment lacerations, as identified by magnetic resonance imaging (MRI).
  • 2) Persons with a lesion in the conus medullaris, cauda equina, or lower extremity peripheral nerve.
  • 3) Persons unable to safely undergo an MRI.
  • 4) Persons in whom adequate MRI imaging cannot be obtained.
  • 5) Persons who have developed a pulmonary embolism (PE) or deep vein thrombosis (DVT).
  • 6) Other traumatic injuries (e.g., CHI, another level of SCI) affecting the ability to provide informed consent and participate fully in rehabilitation.
  • 7) Persons with self-reported persistent severe neuropathic pain, inadequately controlled by non-narcotic medication.
  • 8) Persons with severe persistent mechanical or thermal hypersensitivity/allodynia at the neurological level or rostral to it as documented by clinical testing.
  • 9) Pregnant women or a positive pregnancy test in those women with reproductive potential prior to enrollment.
  • 10) Presence of systemic disease that might interfere with subject safety, compliance, or evaluation of the condition under study.
  • 11) Presence of any unstable medical or psychiatric condition that could reasonably be expected to subject the participant to unwarranted risk from participation in the study or result in a significant deterioration of his/her clinical course.
  • 12) Body Mass Index (BMI) > 35.
  • 13) History of active substance abuse.
  • 14) Persons who have participated in other experimental treatments within the past 90 days deemed by the PI to represent a possible confound or enrolled in any other ongoing trial.
  • 15) Persons with significant lower extremity injury, previous surgery, or amputation such that would preclude satisfactory sural nerve harvest.
  • 16) Persons allergic to gentamicin
  • 17) Persons who test positive for HIV or Hepatitis B or C virus.
  • 18) Baseline entry criteria for renal function, CBC, INR, and liver tests including serum albumin, total bilirubin, alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphastase (ALP), and gamma glutamyl transpeptidase (GGT). Persons with lab values that are concerning in the context of SCI may be excluded from participating in the trial if these indicate chronic or severe acute pathology.
  • 19) Persons with autoimmune diseases, for which chronic corticosteroids or immunosuppression therapy may be needed.
  • 20) Persons with clinically documented malignancy in the past 5 years except for treated non-melanoma skin cancers.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01739023

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United States, Florida
University of Miami Miller School of Medicine
Miami, Florida, United States, 33136
Sponsors and Collaborators
W. Dalton Dietrich
The Miami Project to Cure Paralysis
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Study Director: Dalton Dietrich, PhD University of Miami
Principal Investigator: Allan Levi, MD, PhD University of Miami
Principal Investigator: James Guest, MD, PhD University of Miami
Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: W. Dalton Dietrich, Professor of Neurosurgery, University of Miami Identifier: NCT01739023    
Other Study ID Numbers: 20081061
First Posted: November 30, 2012    Key Record Dates
Last Update Posted: March 5, 2019
Last Verified: March 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Keywords provided by W. Dalton Dietrich, University of Miami:
cell therapy
Schwann cells
spinal cord injury
Additional relevant MeSH terms:
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Spinal Cord Injuries
Wounds and Injuries
Spinal Cord Diseases
Central Nervous System Diseases
Nervous System Diseases
Trauma, Nervous System
Neurologic Manifestations