Response of human chondrocytes prepared for autologous implantation to growth factors.

Susan Chubinskaya, Arnavaz A. Hakimiyan, Lev Rappoport, Adam Yanke, David C. Rueger, Brian J. Cole

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


This study investigated metabolism of autologous chondrocytes after initial expansion immediately before implantation. Chondrocytes cultured in either monolayers or alginate beads were treated with insulin-like growth factor-1 (IGF-1), osteogenic protein-1 (OP-1), or a combination. Proteoglycan synthesis and DNA content were tested in both cultures. Alginate beads also were analyzed with live/dead cell assay, safranin O/fast green stain for histology, and immunohistochemistry with antibodies against collagen type II and VI, aggrecan, decorin, and fibronectin. In monolayers, autologous chondrocytes changed their morphologic appearance. In alginate, they maintained chondrocytic phenotype. Growth factors, especially combined, promoted cell survival and induced chondrocyte proliferation. OP-1 stimulated the largest cartilage-specific matrix and the most accumulation of collagen type II and fibronectin, although the overall matrix synthesized by autologous chondrocyte implantation cells was smaller than that produced by normal chondrocytes. The clinical implications of this study suggest a significant promise for anabolic growth factors in cartilage repair as a potential modifying therapy for the enhancement of chondrocytic phenotype of autologous chondrocytes.

Original languageEnglish (US)
Pages (from-to)192-199
Number of pages8
JournalThe journal of knee surgery
Issue number3
StatePublished - Jul 2008
Externally publishedYes

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine


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