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MACI

Phase 3

Chondral Defect | Monoclonal antibody | Musculoskeletal |Vericel Corporation|Last Updated: Jun 24, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment45

FDA Designations

No designations recorded

Clinical trial landscape

MACI · 1 trial · 4 indications

Phase 3 1
NCT03588975A Study of MACI in Patients Aged 10 to 17 Years With Symptomatic Chondral or Osteochondral Defects of the KneeChondral Defect
RECRUITING45 Analytics
PHASE3RECRUITING
A Study of MACI in Patients Aged 10 to 17 Years With Symptomatic Chondral or Osteochondral Defects of the Knee
Chondral DefectUnlock trial analytics

Study Endpoints

Primary Endpoints

Proportion of Participants Who Achieve ≥ 10-point Improvement From Baseline in KOOS-Child Pain and Function (Sports and Recreational Activities) Subscale Scores
Baseline and Week 104

A responder is defined as a participant with ≥ 10-point change (improvement) in both the KOOS-Child Pain and Function (Sports and Recreational activities) scores from Baseline scores. The Knee and Osteoarthritis Outcome Score for Children (KOOS-Child) is a validated knee-specific instrument developed to assess the participant's opinion of their knee and associated problems. KOOS consists of 5 subscales: Pain, Function in sports and recreational activities, other Symptoms, Function in activities of daily living (ADL), and knee related Quality of life (QOL).

Secondary Endpoints

Change from Baseline in KOOS-Child subscores
Baseline and Week 104
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
MACIEXPERIMENTALautologous cultured chondrocytes on porcine collagen membrane
microfractureOTHERsurgical procedure

Interventions

NameTypeDescription
MACIBIOLOGICALautologous cultured chondrocytes on porcine collagen membrane
microfracturePROCEDUREArthroscopic microfracture treatment
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Eligibility Criteria

Age Range10 Years to 17 Years
SexALL
Healthy VolunteersNo
Study Sites12

Inclusion Criteria: * Symptomatic cartilage or osteochondral defects * One or more International Cartilage Repair Society (ICRS) Grade III or IV chondral or unsalvageable osteochondral defects located on the femoral condyles and/or trochlea amenable to treatment with the surgical procedure determin...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMJun 24, 2026NCT03588975primaryCompletionDate: changed
MEDIUMJun 24, 2026NCT03588975primaryCompletionDate: changed

Frequently asked questions about MACI

What is MACI used for?

MACI is used for the treatment of symptomatic chondral or osteochondral defects of the knee. It is being studied in patients aged 10 to 17 years with these conditions, including chondral defects, osteochondritis dissecans, and articular cartilage defects or disorders of the knee.

Who makes MACI?

MACI is developed by Vericel Corporation, a biopharmaceutical company. Vericel is publicly traded under the ticker symbol VCEL on the stock market.

What phase is MACI in?

MACI is in Phase 3 clinical development. It is an investigational product being studied for the treatment of symptomatic chondral or osteochondral defects of the knee in adolescent patients. It has not yet been approved for this indication.

What clinical trials is MACI in?

MACI is being evaluated in a Phase 3 clinical trial with the identifier NCT03588975. This study is recruiting patients aged 10 to 17 years with symptomatic chondral or osteochondral defects of the knee. The trial is a controlled, randomized study with an enrollment target of 45 participants.

Is MACI a monoclonal antibody?

MACI is classified as a monoclonal antibody modality in the investigational product category. It is being studied for musculoskeletal conditions, specifically for the repair of cartilage defects in the knee.