Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (30): 4764-4770.doi: 10.3969/j.issn.2095-4344.2014.30.002

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Platelet-rich plasma combined with chondrocytes for construction of injectable tissue-engineered cartilage

Wu Jun, Zhang Jun, Liu Jin-bo   

  1. Department of Orthopedics, First People’s Hospital of Changzhou, Changzhou 213003, Jiangsu Province, China
  • Revised:2014-04-18 Online:2014-07-16 Published:2014-08-08
  • Contact: Liu Jin-bo, Chief physician, Department of Orthopedics, First People’s Hospital of Changzhou, Changzhou 213003, Jiangsu Province, China
  • About author:Wu Jun, Studying for doctorate, Associate chief physician, Department of Orthopedics, First People’s Hospital of Changzhou, Changzhou 213003, Jiangsu Province, China
  • Supported by:

    the Major Project of Changzhou Health Bureau, No. 2D2011008

Abstract:

BACKGROUND: Owing to containing large amounts of growth factors, platelet-rich plasma has been widely used in bone regeneration, wound healing, and so on, while few studies have been reported on cartilage tissue engineering.
OBJECTIVE: To explore the effects of platelet-rich plasma on the proliferation and differentiation of chondrocytes, and the feasibility of constructing tissue-engineered cartilage by the combination of chondrocytes and platelet-rich plasma.
METHODS: We detected the concentrations of transforming growth factor-β, insulin-like growth factor-1, platelet-derived growth factor and epidermal growth factor BB in the whole blood, platelet-rich plasma, and activated platelet-rich plasma. The rabbit articular chondrocytes were cultured in 10%, 15%, 20%, 30% platelet-rich plasma for 7 days, then the cell proliferation was tested by cell counting kit-8, and cartilage-related genes (collagen type II, Aggrecan, Sox-9) were determined using QT-PCR. The chondrocytes/platelet-rich plasma composite was implanted subcutaneously into the rabbits, and the samples were harvested after 6 weeks of transplantation for histological examination.
RESULTS AND CONCLUSION: The levels of different growth factors in the platelet-rich plasma were higher than those in the whole blood (P < 0.05), but lower than those in the activated platelet-rich plasma (P < 0.05). Platelet-rich plasma at different concentrations promoted the proliferation of chondrocytes. When the 
concentration of platelet-rich plasma was no more than 20%, the proliferation of chondrocytes showed a concentration-dependent manner. The 20% platelet-rich plasma showed the best effects to promote the expression of collagen type II (P < 0.05), while the 15% platelet-rich plasma could maximize the expression of Sox-9 and Aggrecan  (P < 0.05). After transplantation of chondrocytes/platelet-rich plasma composite, cartilage-like tissue formed with cartilage lacuna-like structures, and rich extracellular matrix was found, which indicates platelet-rich plasma can be used as an injective scaffold in cartilage tissue engineering.


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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Key words: platelet-rich plasma, chondrocytes, tissue engineering, cartilage

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