FDA Approves MACI for the Treatment of Symptomatic Cartilage Defects of the Knee in Adults

First Tissue-Engineered Autologous Cellularized Scaffold Product Approved by the FDA

December 16, 2016  (GLOBE NEWSWIRE)

Vericel Corporation (NASDAQ:VCEL), a leading developer of expanded autologous cell therapies for the treatment of patients with serious diseases and conditions, today announced that the U.S. Food and Drug Administration (FDA) has approved MACI^® (autologous cultured chondrocytes on porcine collagen membrane) for the repair of symptomatic single or multiple full-thickness cartilage defects of the knee with or without bone involvement in adults.

“The treatment of articular cartilage defects in the knee is challenging because articular cartilage in adults has minimal capacity to repair itself,” said David Recker, MD, chief medical officer of Vericel.  “While orthopedic surgeons have long understood that autologous chondrocyte implantation can regenerate cartilage tissue, the previous surgical procedure was technically complex and time consuming, and the indicated patient population was limited.  MACI is the first product to show a statistically significantly greater improvement in KOOS pain and function scores compared to microfracture, a commonly performed alternative surgical treatment for cartilage repair, in a well-controlled Phase 3 clinical study.  With the introduction of MACI, orthopedic surgeons will have a simplified treatment option available for a broader patient population supported by solid clinical evidence.”

The approval of MACI is based on the SUMMIT study (Superiority of MACI implant versus Microfracture Treatment in patients with symptomatic articular cartilage defects in the knee), a two-year prospective, multicenter, randomized, open-label, parallel-group study which demonstrated a statistically significantly (p=0.001) greater improvement in KOOS pain and function (SRA) scores in the MACI group compared to the microfracture group at two years.  Patients from the two-year SUMMIT study had the option to enroll in a three-year follow-up study (extension study).  A majority of the patients who completed the SUMMIT study also participated in the extension study.  Overall efficacy data support a long-term clinical benefit from the use of MACI in patients with cartilage defects of the knee.

MACI is the first FDA-approved cellularized scaffold product that applies tissue engineering processes to grow cells on scaffolds using healthy cartilage tissue from the patient’s own knee.

“Bringing an important new therapy to orthopedic surgeons and patients is a significant milestone for Vericel, and I would like to thank the FDA for working closely with us to make MACI available for these patients,” said Nick Colangelo, president and CEO of Vericel. “We believe that the introduction of MACI, along with investments to expand our commercial organization and implement new patient support programs, positions Vericel to generate significant growth in 2017 and beyond.”

Conference Call Information
Today’s conference call will be available live at 9:00am (EST) in the Investors section of the Vericel website at http://investors.vcel.com/events.cfm. Please access the site at least 15 minutes prior to the scheduled start time in order to download the required audio software if necessary. To participate in the live call by telephone, please call (877) 312-5881 and reference Vericel Corporation investor call. If calling from outside the U.S., please use the international phone number (253) 237-1173. If you are unable to participate in the live call, the webcast will be available until December 13, 2017. A replay of the call will also be available until 12:00pm (EDT) on December 18, 2016 by calling (855) 859-2056, or from outside the U.S. (404) 537-3406. The conference ID is 39558058.

About MACI
MACI (autologous cultured chondrocytes on porcine collagen membrane) is an autologous cellular scaffold product that is indicated for the repair of symptomatic single or multiple full-thickness cartilage defects of the knee with or without bone involvement in adults.  The MACI implant consists of autologous cultured chondrocytes seeded onto a resorbable Type I/III collagen membrane.  Autologous cultured chondrocytes are human-derived cells which are obtained from the patient’s own cartilage for the manufacture of MACI.

Clinical Data
The FDA approval is supported by the results of SUMMIT trial¹, a Phase 3 two‑year, prospective, multicenter, randomized, open-label, parallel-group study that enrolled a total of 144 patients, ages 18 to 54 years, with at least one symptomatic Outerbridge Grade III or IV focal cartilage defect on the medial femoral condyle, lateral femoral condyle, and/or the trochlea.  The co-primary efficacy endpoint was change from baseline to Week 104 for the subject’s Knee injury and Osteoarthritis Outcome Score (KOOS) in 2 subscales:  Pain and Function (Sports and Recreational Activities [SRA]).²  At Week 104, KOOS pain and function (SRA) had improved from baseline in both treatment groups, but the improvement was statistically significantly (p<0.001) greater in the MACI group compared with the microfracture group.  In a responder analysis, the proportion of subjects with at least a 10‑point improvement in both KOOS pain and function (SRA) was greater in the MACI^® group (63/72 = 87.5%; 95% CI [77.6%, 94.6%]) compared with the microfracture group (49/72 = 68.1%; 95% CI [56.0%, 78.6%]).

The most frequently occurring adverse reactions (≥5%) reported for MACI^® in the 2‑year randomized, controlled clinical trial were arthralgia, tendonitis, back pain, joint swelling, and joint effusion.  Serious adverse reactions reported for MACI were arthralgia, cartilage injury, meniscus injury, treatment failure, and osteoarthritis.

Important Safety Information

• MACI is contraindicated in patients with a known history of hypersensitivity to gentamicin, other aminoglycosides, or products of porcine or bovine origin. MACI is also contraindicated for patients with severe osteoarthritis of the knee, inflammatory arthritis, inflammatory joint disease, or uncorrected congenital blood coagulation disorders. MACI is also not indicated for use in patients who have undergone prior knee surgery in the past six months, excluding surgery to procure a biopsy or a concomitant procedure to prepare the knee for a MACI implant.
• MACI is contraindicated in patients who are unable to follow a physician-prescribed post-surgical rehabilitation program.
• The safety of MACI in patients with malignancy in the area of cartilage biopsy or implant is unknown. Expansion of present malignant or dysplastic cells during the culturing process or implantation is possible.
• Patients undergoing procedures associated with MACI are not routinely tested for transmissible infectious diseases. A cartilage biopsy and MACI implant may carry the risk of transmitting infectious diseases to healthcare providers handling the tissue. Universal precautions should be employed when handling the biopsy samples and the MACI product.
• Final sterility test results are not available at the time of shipping. In the case of positive sterility results, health care provider(s) will be contacted.
• To create a favorable environment for healing, concomitant pathologies that include meniscal pathology, cruciate ligament instability and joint misalignment, must be addressed prior to or concurrent with the implantation of MACI.
• Local treatment guidelines regarding the use of thromboprophylaxis and antibiotic prophylaxis around orthopaedic surgery should be followed.  Use in patients with local inflammations or active infections in the bone, joint, and surrounding soft tissue should be temporarily deferred until documented recovery.
• The MACI implant is not recommended during pregnancy. For implantations post-pregnancy, the safety of breast feeding to infant has not been determined.
• Use of MACI in pediatric patients or patients over 55 years of age has not been assessed.
• The most frequently occurring adverse reactions reported for MACI (≥5%) were arthralgia, tendonitis, back pain, joint swelling, and joint effusion.
• Serious adverse reactions reported for MACI were arthralgia, cartilage injury, meniscus injury, treatment failure, and osteoarthritis.

About Articular Cartilage Defects of the Knee
Articular cartilage is a highly organized avascular tissue composed of chondrocytes embedded within an extracellular matrix of collagens, proteoglycans and noncollagenous proteins.  Its primary function is to enable the smooth articulation of joint surfaces, and to cushion compressive, tensile and shearing forces.  Articular cartilage damage is caused by both acute and repetitive trauma resulting in knee pain, effusion or mechanical symptoms such as catching and locking, and swelling.  Since articular cartilage is avascular it has little capacity to repair itself or regenerate.  Articular cartilage lesions that are left untreated may progress to debilitating joint pain, dysfunction, and osteoarthritis³.  The prevalence rate for cartilage lesions in the knee has been reported to be 63% in patients undergoing investigational arthroscopies⁴.

About Vericel Corporation
Vericel develops, manufactures, and markets expanded autologous cell therapies for the treatment of patients with serious diseases and conditions.  The company currently markets two cell therapy products in the United States.  Carticel^® (autologous cultured chondrocytes) is an autologous chondrocyte implant for the treatment of cartilage defects in the knee in patients who have had an inadequate response to a prior arthroscopic or other surgical repair procedure.  Epicel^® (cultured epidermal autografts) is a permanent skin replacement for the treatment of patients with deep dermal or full thickness burns greater than or equal to 30% of total body surface area.  Vericel also plans to market MACI^® (autologous cultured chondrocytes on porcine collagen membrane), an autologous cellularized scaffold product indicated for the repair of symptomatic, single or multiple full-thickness cartilage defects of the knee with or without bone involvement in adults, which has just been approved by the FDA.  Vericel is also developing ixmyelocel‑T, an autologous multicellular therapy intended to treat advanced heart failure due to ischemic dilated cardiomyopathy (DCM).  For more information, please visit the company’s website at www.vcel.com.

Epicel^®, Carticel^®, and MACI^® are registered trademarks of Vericel Corporation. © 2016 Vericel Corporation. All rights reserved.

References

¹Saris D, Price A, Widuchowski W, Bertrand-Marchand M, Caron J, Drogset JO, et al. Matrix-applied characterized autologous cultured chondrocytes versus microfracture: two-year follow-up of a prospective randomized trial. Am J Sports Med. 2014 Jun;42(6):1384-94.

²Roos EM, Lohmander LS. The Knee injury and Osteoarthritis Outcome Score (KOOS): from joint injury to osteoarthritis. Health Qual Life Outcomes. 2003;1:64.

³Bedi A, Feeley BT, Williams RJ. Management of articular cartilage defects of the knee. J Bone Joint Surg Am. 2010;92(4):994‑1009.

⁴Curl WW, Krome J, Gordon ES, Rushing J, Smith BP, Poehling GG. Cartilage injuries: a review of 31,516 knee arthroscopies. Arthroscopy. 1997;13(4):456-60.

CONTACT:
Chad Rubin
The Trout Group crubin@troutgroup.com
(646) 378-2947
or
Lee Stern
The Trout Group lstern@troutgroup.com
(646) 378-2922

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