Promotion of acellular dermal matrix resolution in vitro by matrix metalloproteinase-2.

نویسندگان

  • Jonathan P Lindman
  • Melissa Talbert
  • Wenyue Zhang
  • Benjamin Powell
  • Neil A Accortt
  • Eben L Rosenthal
چکیده

OBJECTIVE To determine whether acellular human dermis is degraded by matrix metalloproteinases (MMPs), a large class of matrix-degrading enzymes. METHODS The degradation of acellular human dermis specimens was evaluated in vitro. Wild-type murine fibroblasts with a broad-spectrum MMP inhibitor, GM6001, and MMP-2-deficient fibroblasts were placed on the basement membrane and dermal surfaces of acellular human dermis. Matrix degradation and fibroblast infiltration into the matrix were assessed after a 20-day incubation period. RESULTS The basement membrane thickness of the specimens cultured with wild-type fibroblasts was significantly less than that of specimens cultured with GM6001 (P<.001), and the infiltration of fibroblasts into the dermal surface was limited by the addition of GM6001 (P=.002). To determine whether MMP-2 was involved in this in vitro phenotype, MMP-2-deficient fibroblasts were assessed in comparison with wild-type fibroblasts. Wild-type fibroblasts degraded the basement membrane surface (P<.001) and infiltrated the dermal surface (P = .003) more efficiently than did MMP-2-deficient fibroblasts. CONCLUSIONS The results from our in vitro experiments suggest that MMPs and specifically MMP-2 may play an important role in the resorption of acellular human dermis. Addition of MMP inhibitors to implanted dermal matrices may slow fibroblast infiltration and improve their longevity in vivo.

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عنوان ژورنال:
  • Archives of facial plastic surgery

دوره 8 3  شماره 

صفحات  -

تاریخ انتشار 2006