Correlating the OA Knee Microenvironment to Outcomes After Regenexx-SD Treatment: A Multi-Site Study

Not Applicable

Terminated

• Conditions: Knee Osteoarthritis

• Registration Number: NCT03898388
• Lead Sponsor: Regenexx, LLC

Brief Summary

Multi-center study to include up to 600 subjects with knee osteoarthritis in unilateral or bilateral knees treated with Regenexx® SD in the osteoarthritic knee/s. Synovial fluid drawn from patients' knee/s prior to receiving Regenexx-SD treatment will be correlated with their clinical outcomes after treatment.

Detailed Description

Initial study procedures include baseline evaluation of medical history, knee history, knee examination, medication use, MRI, and subject-reported outcomes.

Each osteoarthritic subject will undergo withdrawal of knee joint synovial fluid for each knee being treated (0.3-0.5 ml) which will be analyzed by the research laboratory via multiplexed enzyme linked immunosorbent assay (ELISA) and dimethylmethylene blue assay (DMMB) at pre-injection (2-8 days before Regenexx-SD treatment). Documentation of osteoarthritic joint characteristics and injection procedure details will be recorded throughout the study.

The unaffected knee joint will undergo no treatment, but bilateral knees may be treated.

The objective of this study is to correlate the pre- Regenexx-SD treatment levels of pro-inflammatory cytokines, anti-inflammatory cytokines, matrix metalloproteinases, and catabolic articular cartilage breakdown products in the osteoarthritic knee synovial fluid microenvironment with 6 month post-treatment clinical outcomes. This data will be used to establish a predictive a priori testing "model" to determine if a patient is a good candidate for the Regenexx-SD treatment based on their initial osteoarthritic knee synovial fluid microenvironment phenotype. It may also be used to determine if the micro-environment can be altered to improve outcome before receiving Regenexx-SD.

Incidence of post-operative complications, adverse events, re-injections, and surgical intervention and change in pain score will be considered while determining these direct and indirect associations upon completion of the Regenexx-SD treatment.

Components of the synovial fluid will be correlated to post-treatment clinical outcomes, which include several self-reported questionnaires as well as assessment of post-injection complications, adverse events, re-injections and surgical interventions. Patient reported questionnaires include IKDC Subjective Knee Evaluation, Lower Extremity Function Scale, Pain Scales and a Modified Single Assessment Numeric Evaluation (SANE).

Study Timeline

• Study Start: 2019-03-21
• Study First Submitted: 2019-03-29
• Study First Submitted QC: 2019-03-29
• Study First Posted: 2019-04-02
• Primary Completion: 2020-10-30
• Study Completion: 2022-03-30
• Status Verified: 2023-09
• Last Update Submitted: 2023-09-25
• Last Update Posted: 2023-09-28

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 47

Inclusion Criteria

• 1. Voluntary signature of the IRB approved Informed Consent 2) Unilateral or bilateral osteoarthritic male or female ages 35-85 3) Pain, swelling, and/or functional disability in the affected knee consistent with osteoarthritis in the knee joint 4) Physical examination consistent with osteoarthritis in one knee joint 5) Kellgren-Lawrence grade 2 or greater knee osteoarthritis and/or diagnostic MRI imaging of the affected knee showing osteoarthritis (i.e. chondral loss, fissuring, defect, bone marrow lesion, meniscus tear, synovial thickening, etc.) 6) Is independent, ambulatory, and can comply with all post-operative evaluations and visits

Exclusion Criteria

• 7. Knee injections of any type within 3 months prior to the study. 8) Knee surgery within 6 months prior to the study.

  8. Patient undergoing lavage with treatment

  9. Inflammatory or auto-immune based joint diseases or other lower extremity pathology (e.g., rheumatoid arthritis, systemic lupus erythematosus, psoriatic arthritis, polymyalgia, polymyositis, gout pseudogout) 11) Quinolone or statin-induced myopathy/tendinopathy 12) Severe neurogenic inflammation of the cutaneous nerves about the knee or thigh 13) Contraindications for MRI 14) Condition represents a worker's compensation case 15) Currently involved in a health-related litigation procedure 16) Is pregnant 17) Bleeding disorders 18) Currently taking anticoagulant or immunosuppressive medication 19) Allergy or intolerance to study medication 20) Use of chronic opioid 21) Documented history of drug abuse within six months of treatment 22) Any other condition, that in the opinion of the investigator, that would preclude the patient from enrollment

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Primary Outcome Measures

Name	Time	Method
Correlation between components in knee synovial fluid to patient-reported outcomes post-procedure.	6 months after Regenexx-SD treatment	1) Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to IKDC delta scores at 6 months.

Secondary Outcome Measures

Name	Time	Method
Correlation between components of synovial fluid and 6 month Lower Extremity Function Scale (LEFS).	6 months	Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to LEFS deltas at 6 months.
Correlation between components of synovial fluid and 12 month pain scores	12 months	Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to pain scale deltas at 12 months.
Correlation between components of synovial fluid and modified SANE	12 months	Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to modified SANE scores at 12 months.
Correlation between components of synovial fluid to 12 month IKDC outcomes	12 months	Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to IKDC delta scores at 12 months.
Correlation between components of synovial fluid and 6 month modified Single Assessment Numeric Evaluation (SANE)	6 months	Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to SANE scores at 6 months.
Correlation between components of synovial fluid and 12 month LEFS	12 months	Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to LEFS deltas at 12 months.
Correlation between components of synovial fluid and 6 month pain score	6 months	Correlations between cytokine levels, matrix metalloproteinase levels, and catabolic cartilage breakdown products from pre-treatment synovial fluid to pain scale deltas at 6 months.

Trial Locations

Locations (3)

Interventional Orthopedics of Atlanta; 🇺🇸 Atlanta, Georgia, United States

Regenexx Des Moines; 🇺🇸 Des Moines, Iowa, United States

Regenexx Las Vegas; 🇺🇸 Las Vegas, Nevada, United States