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The potential of N-rich plasma-polymerized ethylene (PPE:N) films for regulating the phenotype of the nucleus pulposus

Fackson Mwale, Alain Petit, Hong Tian Wang, Laura M. Epure, Pierre-Luc Girard-Lauriault, Jean A. Ouellet, Michael R. Wertheimer and John Antoniou

Article (2008)

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Cite this document: Mwale, F., Petit, A., Tian Wang, H., Epure, L. M., Girard-Lauriault, P.-L., Ouellet, J. A., ... Antoniou, J. (2008). The potential of N-rich plasma-polymerized ethylene (PPE:N) films for regulating the phenotype of the nucleus pulposus. Open Orthopaedics Journal, 2, p. 137-144. doi:10.2174/1874325000802010137
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We recently developed a nitrogen-rich plasma-polymerized biomaterial, designated "PPE:N" (N-doped plasma-polymerized ethylene) that is capable of suppressing cellular hypertrophy while promoting type I collagen and aggrecan expression in mesenchymal stem cells from osteoarthritis patients. We then hypothesized that these surfaces would form an ideal substrate on which the nucleus pulposus (NP) phenotype would be maintained. Recent evidence using microarrays showed that in young rats, the relative mRNA levels of glypican-3 (GPC3) and pleiotrophin binding factor (PTN) were significantly higher in nucleus pulposus (NP) compared to annulus fibrosus (AF) and articular cartilage. Furthermore, vimentin (VIM) mRNA levels were higher in NP versus articular cartilage. In contrast, the levels of expression of cartilage oligomeric matrix protein (COMP) and matrix gla protein precursor (MGP) were lower in NP compared to articular cartilage. The objective of this study was to compare the expression profiles of these genes in NP cells from fetal bovine lumbar discs when cultured on either commercial polystyrene (PS) tissue culture dishes or on PPE:N with time. We found that the expression of these genes varies with the concentration of N ([N]). More specifically, the expression of several genes of NP was sensitive to [N], with a decrease of GPC3, VIM, PTN, and MGP in function of decreasing [N]. The expression of aggrecan, collagen type I, and collagen type II was also studied: no significant differences were observed in the cells on different surfaces with different culture time. The results support the concept that PPE:N may be a suitable scaffold for the culture of NP cells. Further studies are however necessary to better understand their effects on cellular phenotypes.

Open Access document in PolyPublie
Subjects: 2000 Science et technologie des matériaux > 2004 Polymères et revêtements
2000 Science et technologie des matériaux > 2010 Films minces et interfaces
3100 Physique > 3100 Physique
5100 Biologie cellulaire > 5105 Différenciation cellulaire
Department: Département de génie physique
Research Center: Non applicable
Funders: IRSC/CIHR, AO Foundation, Switzerland, CRSNG/NSERC
Date Deposited: 14 Sep 2020 15:59
Last Modified: 08 Apr 2021 10:43
PolyPublie URL: https://publications.polymtl.ca/5045/
Document issued by the official publisher
Journal Title: Open Orthopaedics Journal (vol. 2)
Publisher: Bentham Open
Official URL: https://doi.org/10.2174/1874325000802010137


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