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Matrix-induced autologous chondrocyte implantation for the treatment of chondral defects of the knees in Chinese patients

Authors Zhang ZW, Zhong X, Ji HR, Tang ZB, Bai JP, Yao MM, Hou JL, Zheng MH, Wood D, Sun JZ, Zhou SF, Liu AB

Received 18 July 2014

Accepted for publication 29 September 2014

Published 5 December 2014 Volume 2014:8 Pages 2439—2448

DOI https://doi.org/10.2147/DDDT.S71356

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Professor Wei Duan

Zhongwen Zhang,1 Xin Zhong,2 Huiru Ji,1 Zibin Tang,1 Jianpeng Bai,1 Minmin Yao,1 Jianlei Hou,1 Minghao Zheng,3 David J Wood,3 Jiazhi Sun,4 Shu-Feng Zhou,4,5 Aibing Liu6

1Department of Orthopedics, General Hospital of Chinese People’s Armed Police Forces (CAPF), Beijing; 2Department of MRI Center, General Hospital of CAPF, Beijing, People’s Republic of China; 3Center for Orthopedic Research, School of Surgery and Pathology, University of Western Australia, Perth, Western Australia, Australia; 4Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, USA; 5Guizhou Provincial Key Laboratory for Regenerative Medicine, Stem Cell and Tissue Engineering Research Center and Sino–US Joint Laboratory for Medical Sciences, Guiyang Medical University, Guiyang, Guizhou; 6Medical Research Center, General Hospital of Chinese People’s Armed Police Forces (CAPF), Beijing, People’s Republic of China


Abstract: Articular cartilage injury is the most common type of damage seen in clinical orthopedic practice. The matrix-induced autologous chondrocyte implant (MACI) was developed to repair articular cartilage with an advance on the autologous chondrocyte implant procedure. This study aimed to evaluate whether MACI is a safe and efficacious cartilage repair treatment for patients with knee cartilage lesions. The primary outcomes were the Knee Injury and Osteoarthritis Outcome Score (KOOS) domains and magnetic resonance imaging (MRI) results, compared between baseline and postoperative months 3, 6, 12, and 24. A total of 15 patients (20 knees), with an average age of 33.9 years, had a mean defect size of 4.01 cm2. By 6-month follow-up, KOOS results demonstrated significant improvements in symptoms and knee-related quality of life. MRI showed significant improvements in four individual graft scoring parameters at 24 months postoperatively. At 24 months, 90% of MACI grafts had filled completely and 10% had good-to-excellent filling of the chondral defect. Most (95%) of the MACI grafts were isointense and 5% were slightly hyperintense. Histologic evaluation at 15 and 24 months showed predominantly hyaline cartilage in newly generated tissue. There were no postoperative complications in any patients and no adverse events related to the MACI operation. This 2-year study has confirmed that MACI is safe and effective with the advantages of a simple technique and significant clinical improvements. Further functional and mechanistic studies with longer follow-up are needed to validate the efficacy and safety of MACI in patients with articular cartilage injuries.

Keywords: articular cartilage lesion, Knee Injury and Osteoarthritis Outcome Score, KOOS, magnetic resonance imaging, MRI

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