Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

IMPACT: Safety and Feasibility of a Single-stage Procedure for Focal Cartilage Lesions of the Knee. (IMPACT)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified July 2014 by UMC Utrecht.
Recruitment status was:  Active, not recruiting
Information provided by (Responsible Party):
D.B.F. Saris, UMC Utrecht Identifier:
First received: January 13, 2014
Last updated: July 17, 2014
Last verified: July 2014
Articular cartilage defects in the knee have a poor intrinsic healing capacity and may lead to functional disability and osteoarthritis. Cartilage cell therapy using autologous chondrocyte implantation (ACI) has been established as the first advanced treatment therapy medicinal product. Although this technique has achieved good mid-term results, it is a costly and extensive two-stage procedure which is limited by the number of chondrocytes obtained by biopsy and the dedifferentiation resulting from the expansion phase. Therefore, there is a need for improvement. A new cartilage repair technique should aim at decreasing surgical trauma, lowering complexity, improving logistics and cost-effectiveness while retaining or improving clinical outcome. Direct contact between mesenchymal stromal cells (MSCs) and dedifferentiated articular chondrocytes in vitro showed improvement of the chondrogenic phenotype of dedifferentiated articular chondrocytes. In addition, preserving the pericellular matrix of chondrocytes improves cartilage formation. These chondrons (chondrocytes with their pericellular matrix) have shown improved cartilage formation when combined with allogeneic MSCs in extensive preclinical studies. The cells are mixed with fibrin cell carrier and applied to the cartilage lesion within one surgical procedure. This will reduce patient morbidity and improve patient care through immediate transplantation of a potent cell-based cartilage product. This is a phase I/II prospective monocenter study to evaluate the safety and feasibility of the IMPACT for treatment of focal articular cartilage lesions of the knee.

Condition Intervention Phase
Foreign-Body Reaction
Effusion (L) Knee
Knee Pain Swelling
Other: Cartilage repair surgery
Phase 1
Phase 2

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Instant MSC Product Accompanying Autologous Chondron Transplantation (IMPACT): Safety and Feasibility of a Single-stage Procedure for Focal Cartilage Lesions of the Knee.

Further study details as provided by UMC Utrecht:

Primary Outcome Measures:
  • Safety [ Time Frame: Multiple time points up to 18 months ]
    Adverse event rate non-inferior to standard treatment (autologous chondrocyte implantation) and leads to no serious adverse events such as a immunological response.

Secondary Outcome Measures:
  • Clinical improvement [ Time Frame: 18 months ]
    Clinical improvement as measured by patient reported outcome scores.

Other Outcome Measures:
  • Structural repair [ Time Frame: 12 months ]
    To examine parameters of structural repair at one year after treatment using MRI and a second-look arthroscopy.

  • Health care use and costs [ Time Frame: 18 months ]
    To assess the healthcare use and costs related to the procedure as well as the health-related work leave during the study period.

Estimated Enrollment: 35
Study Start Date: March 2013
Estimated Study Completion Date: August 2015
Primary Completion Date: July 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Cartilage repair surgery
Single-stage cartilage repair surgery using autologous chondrons and allogeneic MSCs in a fibrin glue carrier.
Other: Cartilage repair surgery
Single-stage surgery, After debridement, the cartilage defect is filled with the fibrin glue carrier containing autologous chondrons and allogeneic MSCs
Other Names:
  • Single-stage
  • Cartilage repair


Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age >18 and <45 years old
  • Symptomatic isolated full-thickness articular cartilage lesion on the femoral condyle or trochlea.
  • Size 2 - 8 cm2
  • Intact anterior cruciate ligament

Exclusion Criteria:

  • (History of) osteoarthritis, defined as Kellgren-Lawrence grade >3 as determined from appropriate X-ray.
  • Concomitant inflammatory disease that affects the joint (rheumatoid arthritis, metabolic bone disease, psoriasis, gout, symptomatic chondrocalcinosis)
  • (History of) Septic arthritis.
  • Malalignment requiring an osteotomy.
  • (History of) total menisectomy in the target knee joint.
  • Any surgery in the knee joint 6 months prior to study inclusion.
  • Risk groups for MRI scanning due to the magnetic field like patients with pacemakers, nerve stimulators, metal particles, stents, clips or implants, (possible) pregnancy or breast feeding.
  • Patients with severe anxiety for MRI scans and/or needles
  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 identifier: NCT02037204

University Medical Center Utrecht
Utrecht, Netherlands, 3508GA
Sponsors and Collaborators
UMC Utrecht
Study Director: Tommy S. de Windt, MD UMC Utrecht
Principal Investigator: Daniel B.F. Saris, MD, PhD UMC Utrecht
  More Information

Additional Information:
Responsible Party: D.B.F. Saris, MD, PhD, Orthopaedic surgeon, UMC Utrecht Identifier: NCT02037204     History of Changes
Other Study ID Numbers: IMPACT
Study First Received: January 13, 2014
Last Updated: July 17, 2014

Keywords provided by UMC Utrecht:
Mesenchymal stem cells
Allogeneic MSCs
Cartilage repair

Additional relevant MeSH terms:
Foreign Bodies
Foreign-Body Reaction
Pathologic Processes
Wounds and Injuries processed this record on April 27, 2017