J. F. Wong, C. N. Soparkar and J. R. Patrinely, “Correction of Lower Eyelid Retraction with High Density Porous Polyethylene: The Medpor((R)) Lower Eyelid Spacer,” Orbit, Amsterdam, Vol. 20, 2001, pp. 217-225.

has been cited by the following article:

• TITLE: Medpor® Acts on Stem Cells Derived from Peripheral Blood

  AUTHORS: Vincenzo Sollazzo, Annalisa Palmieri, Ambra Girardi, Francesca Farinella, Giorgio Brunelli, Giuseppe Spinelli, Francesco Carinci

  KEYWORDS: Alloplastic Material, Porous Polyethylene, Gene Expression, Stem Cells

  JOURNAL NAME: Materials Sciences and Applications, Vol.1 No.1, April 29, 2010

  ABSTRACT: Porous polyethylene (PP or Medpor®) is an alloplastic material used worldwide for craniofacial reconstruction. Although several clinical studies are available, how this material alters osteoblast activity to promote bone formation is poorly understood. To study how PP can induce osteoblast differentiation in mesenchymal stem cells, the expression levels of bone related genes and mesenchymal stem cells marker were analyzed, using real time Reverse Transcription-Polymerase Chain Reaction. PP causes induction of osteoblast transcriptional factor RUNX2 and of the bone related genes osteocalcin (BGLAP) and alkaline phosphatase (ALPL). In contrast the expression of ENG was decreased in stem cells treated with PP respect to untreated cells, indicating the differentiation effect of this biomaterial on stem cells. The obtained results can be relevant to better understand the molecular mechanism of bone regeneration and as a model for comparing other materials with similar clinical effects.