Leukocyte-platelet-rich plasma (L-PRP) impairs the osteoconductive capacity of the autograft associated to changes in the immunolocalization of TGF-beta 1 and its co-expression with Wnt10b and CD34 cells

作者：Giovanini Allan Fernando^*; Deliberador Tatiana Miranda; Tannuri Nemeth Jose Eduardo; Crivellaro Viviane Rozeira; Portela Giovanna Schirmer; de Oliveira Filho Marco Antonio; de Araujo Melissa Rodrigues; Zielak Joao Cesar; Gonzaga Carla Castiglia

来源：Journal of Cranio-Maxillofacial Surgery, 2013, 41(7): E180-E186.

DOI：10.1016/j.jcms.2013.01.003

• Platelet-rich plasma
• Bone regeneration
• TGF-beta 1
• Wnt10b
• CD34

Background: This study evaluated the osteoconductive effect of an autograft, in the presence or absence of the L-PRP, using histomorphometric analysis of the bone formed, and we compared the results in the presence of TGF-beta 1, Wnt10b and CD34 detected by immunohistochemistry.
Materials and methods: Two bone defects were produced in the calvaria of 20 rabbits. The defects were treated with autograft and autograft combined with L-PRP. The animals were euthanized at 15 and 40 days post-surgery. Data were analyzed by Student-Newman-Keuls (p <= 0.05) test for histomorphometric and immunohistochemical interpretation.
Results: The results revealed that the presence of bone matrix was significantly less in the defects treated with L-PRP. These results coincided with changes of the immunolocalization of the TGF-beta 1. In the L-PRP-free groups the TGF-beta 1 was restricted to bone matrix while the CD34 was scarce and the Wnt10b occurred in peritrabecular cells. In contrast, in defects that received L-PRP the presence of TGF-beta 1 occurred in cells, which occupied whole area of defect. These TGF-beta 1+ cells also were co-expressed to Wnt10b and CD34.
Conclusion: These results suggest that L-PRP induces a cross-reaction between TGF-beta 1 and Wnt10b, which stimulates the self-renewal and maintenance of CD34+ stem cells immunophenotype, impairing the osteoconductivity properties of the autograft.

• 出版日期2013-10