REcycled CartiLage Auto/Allo IMplantation


About this study

The primary objective of the study is to assess the local and systemic safety of a single operative application of autologous chondrons mixed with culture expanded allogeneic AMSCs (RECLAIM) in the treatment of symptomatic focal cartilage defects of the hip.

The secondary objectives of the study are to assess the effect of RECLAIM on pain and function in the target hip, and to assess the effect of RECLAIM on bone and cartilage structures within the target hip using MRI.



Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • Male or female ages 18-50 years.
  • Persons of childbearing potential must have a negative pregnancy test prior to receiving the study drug and will agree to use adequate contraception (hormonal or barrier method or abstinence) from the time of screening to a period of 2 years following treatment. Females of childbearing potential are defined as premenopausal and not surgically sterilized, or post-menopausal for fewer than 2 years. A urine pregnancy test will be performed prior to the administration of the study drug to confirm negative results. If the urine pregnancy test is positive, the study drug will not be administered and the result will be confirmed by a serum pregnancy test. Urine pregnancy tests will be performed by qualified personnel using kit.
  • Persons becoming pregnant during the study will continue to be monitored for the duration of the study or completion of the pregnancy, whichever is longer. Monitoring will include perinatal and neonatal outcome. Any SAEs associated with pregnancy will be recorded.
  • Chronic (> 3 months), unilaterally symptomatic, ICRS Grade III or IV cartilage lesions ranging in size from 2 to 8 cm^2. Patients with episodes of contralateral knee pain that is asymptomatic at the time of enrollment will be eligible for inclusion.  However, as outlined in the primary study endpoints, patients with previous episodes of contralateral knee pain who experience a repeat episode of contralateral pain similar to their established pattern of pain during the course of the trial will not be considered as having experienced an adverse event.
  • Radiographic knee OA of Kellgren-Lawrence Grade 1 or less, consisting of normal knee radiographs (Grade 0) or doubtful narrowing of the joint space and possible osteophytic lipping (Grade 1).
  • Previous 6 week or longer trial of one of the following conservative treatments:
    • activity modification;
    • weight loss;
    • physical therapy;
    • anti-inflammatory medications; or
    • injection therapy (e.g., cortisone).
  • If applicable, at least 3 months will have passed since the last target knee intraarticular injection prior to undergoing RECLAIM therapy and at least 6 months will have passed between any prior arthroscopic or open knee procedures.
  • Able to routinely walk without assistance (e.g., cane, walker).
  • Clinically stable target knee. Patients undergoing primary anterior crucial ligament (ACL) reconstruction will be eligible for inclusion if their target knee is otherwise stable and well-aligned.
  • No additional surgery planned in the target knee for at least 12 months following RECLAIM therapy.
  • Completed general physical and well-being evaluation with primary care provider within 12 months of enrollment.
  • Fully understanding of the requirements of the study and willingness to comply with the treatment plan, including laboratory tests, diagnostic imaging, and follow-up visits and assessments.
  • Can provide written informed consent and complete HIPAA documentation after the nature of the study is fully explained and prior to any study-related procedure.

Exclusion Criteria:

  • Pregnant or nursing, or planning on becoming pregnant during the study period.
  • Congenital or acquired malformation of the target knee resulting in significant deformity or leading to problems with the study treatment or analysis of the results.
  • Significant knee malalignment that is not corrected at the time of RECLAIM surgery.
  • Injections of any kind into the target knee within 3 months prior to study enrollment.
  • Greater than 50% preoperative loss in native meniscus volume (i.e., meniscectomy, degenerative loss) in the surgical knee compartment. Patients undergoing repair of meniscus tears without > 50% meniscus volume loss will remain eligible for inclusion.
  • History of intra-articular infection in the target knee.
  • History of superficial infection in the target knee within 6 months of study enrollment, or evidence of current superficial infection affecting the target knee.
  • History of falls requiring medical attention, or gait instability.
  • Clinically significant abnormal hematology (complete blood count with differential), blood chemistry, or urinalysis screening laboratory results.
  • Body mass index (BMI) > 35 kg/m^2.
  • Taking anticoagulant medications (e.g., warfarin, heparin or clopidogrel) which may pose a clinically-significant contraindication to surgical RECLAIM therapy.
  • Taking herbal therapies or supplements within 4 weeks of enrollment or unwilling to avoid use of herbal therapies or supplements until at least 30 days following  completion of the RECLAIM treatment cycle (includes, but not limited to chondroitin sulfate, diacerein, n-glucosamine, piascledine, and capsaicin).
  • Taking non-steroidal anti-inflammatory medications (e.g., COX-2 inhibitors) without a stable dosing regimen for at least 4 weeks before baseline evaluation, or anticipating not remaining on a stable dose until at least 30 days following completion of the study drug treatment cycle.
  • Use of electrotherapy or acupuncture for knee pain, unless there is a stable regimen for at least 4 weeks before baseline assessment.
  • Taking anti-rheumatic disease medication (including methotrexate or other antimetabolites) within 3 months prior to study enrollment.
  • On chronic, immunosuppressive transplant therapy or having a chronic, immunosuppressive state, including use of systemic steroids/corticosteroids.
  • Current tobacco product use, including nicotine patch or other nicotine products.
  • Clinically significant systemic inflammatory, rheumatological or connective tissue disorder including but not limited to rheumatoid arthritis, systemic sclerosis, system lupus erythematosus, and Ehlers-Danlos Syndrome.
  • Clinically significant rheumatological or inflammatory disease of the knee or chondrocalcinosis/calcium pyrophosphate disease (CPPD), hemochromatosis, inflammatory arthritis, arthropathy of the knee associated with juxta-articular Paget's disease of the femur or tibia, ochronosis, hemophilic arthropath.

Eligibility last updated 8/2/22. Questions regarding updates should be directed to the study team contact.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Aaron Krych, M.D.

Contact us for the latest status

Contact information:

Ciara Terry

(507) 538-3562

More information


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