An Exploratory Clinical Study to Investigate the Effect of autoSTEM-OA and alloSTEM-OA in Participants With Knee Osteoarthritis


A phase 1 exploratory clinical study to investigate safety, tolerance and efficacy of a single intra-articular injection of autoSTEM-OA or alloSTEM-OA in participants with mild to moderate knee osteoarthritis

Full Title of Study: “An Exploratory Clinical Study to Investigate the Effect of autoSTEM-OA and alloSTEM-OA in Participants With Knee Osteoarthritis.”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: None (Open Label)
  • Study Primary Completion Date: November 1, 2024


  • Biological: STEM-OA
    • Combination of autologous or allogeneic MSC(AT)s and fat

Arms, Groups and Cohorts

  • Experimental: autoSTEM-OA 400
    • 400×10^6 autologous MSC(AT)s in autologous fat
  • Experimental: alloSTEM-OA 400
    • 400×10^6 allogeneic MSC(AT)s in autologous fat
  • Experimental: autoSTEM-OA 800
    • 800×10^6 autologous MSC(AT)s in autologous fat
  • Experimental: alloSTEM-OA 800
    • 800×10^6 allogeneic MSC(AT)s in autologous fat
  • Experimental: autoSTEM-OA 1600
    • 1600×10^6 autologous MSC(AT)s in autologous fat
  • Experimental: alloSTEM-OA 1600
    • 1600×10^6 allogeneic MSC(AT)s in autologous fat

Clinical Trial Outcome Measures

Primary Measures

  • STEM-OA safety
    • Time Frame: 13 weeks
    • Number of treatment emergent adverse events (TEAEs)

Secondary Measures

  • Knee pain
    • Time Frame: 13 weks
    • Change in KOOS ‘pain’ score
  • Number of treatment responders
    • Time Frame: 13 weks
    • Number of treatment responders according to the OMERACT-OARSI criteria

Participating in This Clinical Trial

Inclusion Criteria

1. Informed consent obtained before any study-related activities. Study-related activities are any procedures that are carried out as part of the study, including activities to determine suitability for the study. 2. Male or female, aged 18 – 60 years (both inclusive) at the time of informed consent. 3. Joint pain ≥ 30mm on 100mm VAS at screening 4. Grade 2-3 Kellgren Lawrence OA on radiograph with no full-thickness lesion >1 cm in any dimension by x-ray 5. Failure of minimum 2 nonoperative therapies (oral pain medications, physical therapy, corticosteroid injection, or viscosupplementation injection) 6. Body mass index (BMI) within the range 18 – 35 kg/m2 (both inclusive) 7. Minimum 200 ml of fat (lipoaspirate) available for liposuction at the abdomen and/or thighs as judged by the investigator. 8. Agree to donate cells to alloSTEM-OA participants. 9. Fulfils eligibility criteria for allogeneic cell- and tissue donors. 10. Speaks and reads Danish or English Exclusion Criteria:

1. Active tobacco use, or use of other nicotine substitutes 2. Active cancer or still in follow-up (5 years) 3. Rheumatologic disease 4. Avascular disease 5. Severe bone deformity 6. Previous infection of the knee joint 7. Pes anserine bursitis 8. pain attributed to diffuse edema 9. pain attributed to displaced meniscal tear or osteochondritis 10. Neurogenic or vascular claudication 11. Bleeding disorders 12. Chemotherapy 13. Radiation therapy to the leg or adipose harvested site 14. Knee injections within 3 months of treatment 15. Unable to discontinue the following drugs 7 days before injections (prescription pain medication, anticoagulation medicine (including ibuprofen), thrombolytics, antiplatelet medication) 16. Use of oral glucocorticoids. 17. Female who is pregnant, breast-feeding or intends to become pregnant within 1-year after the treatment, or is of child-bearing potential and not using highly effective contraceptive method. 18. Known chronic disease associated with metabolism malfunction or poor healing. 19. Allergy towards necessary anaesthesia 20. Varus/valgus malalignment >5° 21. Isolated patellofemoral arthrosis

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 60 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • StemMedical A/S
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Contact(s)
    • Jesper Due Jensen, PhD, +45 51222087,

Clinical trials entries are delivered from the US National Institutes of Health and are not reviewed separately by this site. Please see the identifier information above for retrieving further details from the government database.

At, we keep tabs on over 200,000 clinical trials in the US and abroad, using medical data supplied directly by the US National Institutes of Health. Please see the About and Contact page for details.