Amp 30: Autologous Fat Grafting, Amputation Sites Pain: Randomized

This study is currently recruiting participants. (see Contacts and Locations)
Verified August 2014 by University of Pittsburgh
Sponsor:
Information provided by (Responsible Party):
J. Peter Rubin, MD, University of Pittsburgh
ClinicalTrials.gov Identifier:
NCT02076022
First received: February 27, 2014
Last updated: August 12, 2014
Last verified: August 2014
  Purpose

We propose a prospective, randomized clinical study to assess the efficacy of minimally invasive autologous fat transfer addressing pain and poor prosthetic fit at amputation sites.


Condition Intervention Phase
Wounded Warrior
Limb Shortening
Amputation
Device: Enhanced Fat Grafting
Procedure: Standard fat graft
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: Adipose Stromal Cell Enriched Autologous Fat Grafting for Treating Pain at Amputation Sites: A Single Center Site, Prospective, Randomized, Pilot Outcomes Trial

Further study details as provided by University of Pittsburgh:

Primary Outcome Measures:
  • Efficacy [ Time Frame: 2 years ] [ Designated as safety issue: No ]

    Assess the efficacy of minimally invasive autologous fat transfer at the amputation sites and the modulation of pain at the respective sites

    Compare two minimally invasive techniques as an alternative to invasive operations, with the understanding that this therapy does not preclude more invasive procedures in the future. We further hypothesize that enriching the fat graft with autologous adipose stromal cells utilizing the Tissue Genesis Cell Isolation System (CIS), a regenerative medicine approach, will lead to improved retention of the fat graft over time and result in a more favorable outcome.



Secondary Outcome Measures:
  • Treat painful amputation sites [ Time Frame: 2 years ] [ Designated as safety issue: No ]
    Provide fat grafting to additional subcutaneous tissue padding over bony structures and nerve trunks. Limb anatomy and healing of the graft over time, along with stability/persistence of the new tissue, will be assessed by high resolution CT scanning with 3D reconstruction. Patients will be followed for 24 months after treatment to define long term outcomes. The primary outcome measures will be pain at the amputation site and improved ability to tolerate a prosthesis. Patients will be randomized to receive either standard fat grafting (15 patients)or cell enriched fat grafting (15 patients) utilizing the Tissue Genesis Cell Isolation System (CIS). Patients will be enrolled who have pain at an amputation site that limits function and/or interferes with the ability to use a prosthesis.

  • Assess biologic properties of the cells within the fat graft [ Time Frame: 2 years ] [ Designated as safety issue: No ]
    Assess biologic properties of the cells within the fat graft and correlate with clinical outcomes. This will include adipose stem cell yield per volume of fat tissue, cell proliferation, capacity for adipogenic differentiation, lipolysis, and cell sub-population analysis by multiparameter flow cytometry. Results of these assays will be correlated with graft volume retention to search for predictors of good clinical outcome that are related to variation on adipose biology between subjects

  • Quality of Life measurements [ Time Frame: 2 years ] [ Designated as safety issue: No ]
    Measure quality of life in patients before and after autologous fat grafting using validated psychosocial measures. This will include, among other tools, SF 36, the Beck inventory, and instruments designed for assessing limb function.


Estimated Enrollment: 30
Study Start Date: March 2014
Estimated Study Completion Date: March 2016
Estimated Primary Completion Date: March 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Standard fat grafting
Once harvested the aspirated fat tissue will be processed as standard graft material. It will be divided into small aliquots and centrifuged in a sterile rotor (3000 rpm for 3 minutes/1200g), and top fluid oil layer from the fat tissue fractions were removed, and transferred into 1ml syringes and injected into the amputation stump. This graft preparation will be performed in the operating room. Standard fat graft material will serve as a control treatment and will be injected into limb using specialized injection cannulas
Procedure: Standard fat graft
Aspirated fat tissue will be processed as standard graft material. It will be divided into small aliquots and centrifuged in a sterile rotor (3000 rpm for 3 minutes/1200g), and top fluid oil layer from the fat tissue fractions were removed, and transferred into 1ml syringes and injected into the amputation stump. This graft preparation will be performed in the operating room. Standard fat graft material will serve as a control treatment and will be injected into limb using specialized injection cannulas
Experimental: Enhanced Fat Grafting

Approximately 60 cc of lipoaspirate will be collected from the subject to be processed with the Tissue Genesis Cell Isolation System™ (CIS) to yield approximately 35cc of Stromal Vascular Fraction (SVF).Once harvested the aspirated fat will then be divided into two portions: one portion will be processed as standard graft material (standard/control graft) while the other portion will be used in a processing step that concentrates the adipose stromal cells.

The aspirated fat processed as standard graft material will be divided into small aliquots and centrifuged in a sterile rotor (3000 rpm for 3 minutes/1200g), and allowed to decant before separating the fluid and oil layers from the fat tissue fractions, and transferred into 50 ml syringes. This graft preparation will be performed in the operating room.

Device: Enhanced Fat Grafting

The stromal vascular fraction (SVF) cell suspension (device output) will be processed using the Tissue Genesis Cell Isolation System™

The Standard graft material and the stromal vascular fraction cells will be mixed and subsequently injected into the amputated stump at a concentration of 2.0 - 3.0 x 10 6 stromal vascular cells/ml of injected fat graft to each site. The volume of each injected fat graft will depend on the volume requirements for each injured extremity.

To manually combine the standard fat graft material and the SVF suspension (device output), each of the syringes will be connected via luer to luer lock. The contents of the lipoaspirate syringe are transferred to the SVF syringe and the cell suspension will be injected slowly back and forth between the two (2) syringes. The final 1 mL SVF-fat graft syringe is now considered cell-enriched and ready for injection into the subject.

Other Name: Tissue Genesis Cell Isolation System™ (CIS)

Detailed Description:

We hypothesize that autologous fat grafting can provide a minimally invasive therapy facilitated by enabling technology of specialized instrumentation to effectively mitigate pain syndromes at amputation sites, by introducing volume stable subcutaneous tissue over bony prominences and peripheral nerve trunks, thereby avoiding surgical revisions and preserving limb length.

We further hypothesize that enriching the fat graft with autologous adipose stromal cells utilizing the Tissue Gensis Cell Isolation System (CIS), a regenerative medicine approach, will lead to improved retention of the fat graft over time and result in a more favorable outcome.

Specific Aims:

  1. Treat painful amputation sites in 30 patients with fat grafting to provide additional subcutaneous tissue padding over bony structures and nerve trunks. Limb anatomy and healing of the graft over time, along with stability/persistence of the new tissue, will be assessed by high resolution CT scanning with 3D reconstruction. Patients will be followed for 24 months after treatment to define long term outcomes. The primary outcome measures will be pain at the amputation site and improved ability to tolerate a prosthesis. Patients will be randomized to receive either standard fat grafting (15 patients)or cell enriched fat grafting (15 patients). Patients will be enrolled who have pain at an amputation site that limits function and/or interferes with the ability to use a prosthesis.
  2. Assess biologic properties of the cells within the fat graft and correlate with clinical outcomes. This will include adipose stem cell yield per volume of fat tissue, cell proliferation, capacity for adipogenic differentiation, lipolysis, and cell sub-population analysis by multiparameter flow cytometry. Results of these assays will be correlated with graft volume retention to search for predictors of good clinical outcome that are related to variation on adipose biology between subjects.
  3. Measure quality of life in patients before and after autologous fat grafting using validated psychosocial measures. This will include, among other tools, SF 36, the Beck inventory, and instruments designed for assessing limb function.

Study Design:

Single center site, prospective, randomized, pilot outcomes study with treatment performed at the University of Pittsburgh.

The primary outcome measurements will be: 1) fat graft retention at the amputation site; and 2) improved ability to tolerate a prosthetic device. This study will examine if fat grafting with cell enrichment using the Tissue Gensis Cell Isolation System, (CIS) will demonstrate increased fat retention and decreased pain compared to standard fat grafting alone.

Clinical Impact:

This study will significantly impact military trauma care by validating a minimally invasive cell based technique for alleviating pain at amputation sites and improving function with a prosthesis. Importantly, the goal will be reached without invasive surgery, increased risk, and a prolonged recovery. Given the high amputation rate in the current conflicts, this work is highly relevant to the care of the wounded warrior. A major goal of this study will be to transfer the techniques and knowledge gained to physicians throughout the Department of Defense healthcare system.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Aged 18 years or older and able to provide informed consent
  • Have suffered injury resulting in an amputation with pain that limits the fitting and use of a prosthesis, despite maximal attempts to refit the prosthesis and/or change the design of the prosthesis and/or Have suffered an injury resulting in an amputation with pain that limits the use of an assistive device(s) despite maximal attempts to change the design of use of the device
  • Be at least 3 months post-injury or post-surgery (from trauma procedures) so that acute edema is resolved
  • Soft tissue deficiencies are noted at amputation stump and are covered by intact skin
  • Willing and able to comply with follow up examinations, including radiographic studies
  • Subjects who are, in the opinion of the Investigator, able to understand the study, comply with the study design and are willing to return to the clinic for all the research required follow-up visits
  • Subjects with residual limb problems including upper and lower limb loss, and/or individuals with partial hand, partial foot and more proximal injuries.
  • Subjects with Intolerability that may include appropriate soft tissue padding, soft tissue coverage, or pain that doesn't allow the consistent wearing of a prosthetic socket. (This may include excessive pain, inability to achieve adequate suspension of prosthesis on the individual, continual skin breakdown, excessive pressure/shear on skin, soft tissue, nerves, scars, etc.) and/or Subjects with Intolerability that limits use of an assistive device(s) that aid mobility of daily living activities involving the functional use of affected limb.
  • Subjects who are unable to consistently wear a prosthetic socket must have received a minimum of 3 months of unsuccessful prosthetic fitting trials. This will include a minimum of at least 5 different socket adjustments. This can include re-casting the residual limb, providing pressure relieves within the socket, changing the alignment of the prosthetic components to alter ground reactive forces, and adding padding to pressure sensitive areas.
  • Subjects should have an approximate range of the defect volume between 5cc to as much as 300cc. if the defect is a very local soft tissue deficiency over a pressure point. (The volume of the defect correlates with moderate or severe intolerability of the prosthesis)

Exclusion Criteria:

  • Age less than 18 years
  • Patient has inability to provide informed consent process.
  • Amputated limb area intended for treatment has open wounds or tunneling
  • Active drainage or active infection unresolved with one course of antibiotic treatment
  • Active infection anywhere in the body
  • Diagnosed with cancer within the last 12 months and /or presently receiving chemotherapy or radiation treatment
  • Known coagulopathy symptoms /diagnosis
  • Systemic disease that would render the fat harvest and injection procedure, along with associated anesthesia, unsafe to the patient (e.g., scleroderma, lupus, vasculatures, collagen disease etc.)
  • Pregnancy
  • History of Diabetes Mellitus
  • History of severe peripheral arterial disease
  • Subjects with an Axis I to diagnosis DSM-IV (e.gg., Schizophrenia, Bipolar Disorder). Subjects who are found to be stable (as defined by the screening Pyschosocial asesssment) could be eligible for study participation per the Physician's discretion.
  • Subjects with abnormal blood biochemistry or any other abnormal laboratory finding considered clinically significant in that it would deem the subject inappropriate for surgical procedures. This criterion will help to exclude subjects with severe nutritional deficiency, anemia, coagulopathy, renal and liver dysfunction, diabetes, and peripheral vascular disease, as determined by the investigator (i.e. CBC with Differential, platelets, comprehensive metabolic panel to include electrolytes, bun/creatinine, liver function test and coagulation tests). As general safety measures, we will exclude patients with lab values listed below: Hct less than 25 INR greater than 1.8 Creatinine greater than 2.0 Liver function tests (ALT, AST, Bilirubin) greater than 2 times upper limit Albumin- Less than 2.0 If Diabetic, Hgbn A1C greater than 7 Platelets less than 70
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT02076022

Contacts
Contact: CIRM 412-864-2587 Restore@upmc.edu

Locations
United States, Pennsylvania
University of Pittsburgh Not yet recruiting
Pittsburgh, Pennsylvania, United States, 15213
University of Pittsburgh Recruiting
Pittsburgh, Pennsylvania, United States, 15213
Contact: Carroll Lee, RN    412-864-2587      
Sponsors and Collaborators
University of Pittsburgh
Investigators
Principal Investigator: J. Peter Rubin, MD University of Pittsburgh
  More Information

Additional Information:
No publications provided

Responsible Party: J. Peter Rubin, MD, Principal Investigator, University of Pittsburgh
ClinicalTrials.gov Identifier: NCT02076022     History of Changes
Other Study ID Numbers: PRO12050147
Study First Received: February 27, 2014
Last Updated: August 12, 2014
Health Authority: United States: Food and Drug Administration

Keywords provided by University of Pittsburgh:
Fat Grafting
Pain at amputation site
prosthetic

ClinicalTrials.gov processed this record on September 14, 2014