TLR2 Signaling Pathway in Alveolar Bone Osteogenesis Induced by Aloe vera and Xenograft (XCB)

Braz Dent J. 2017 May-Jun;28(3):281-286. doi: 10.1590/0103-6440201600834.

Abstract

The aim of this study was to find the role of TLR2 signaling pathway in reducing osteoclast activity and promoting osteoblast growth by inducing a combination of Aloe vera and cancellous bovine xenograft (XCB) into dental extraction socket. Forty-eight Cavia cobayas were used. They were divided into eight groups (n=6). For control group, their mandibular incisors were extracted and filled with PEG. For treatment groups, they were extracted and filled with XCB, Aloe vera and the combination of Aloe vera and XCB. The first four groups were sacrificed after 7 days and the other groups after 30 days. Immunohistochemistry and histopathology examination were conducted to examine TLR2, TNFa, OPG, collagen-1, and the osteoblast and osteoclast expressions. The expressions of TLR2, OPG and Collagen-1, as well as the number of osteoblast were increased. Meanwhile, the expressions of TNFa and osteoclast were decreased. The study finding was that TLR2 signaling pathway influenced alveolar bone osteogenesis process by reducing osteoclast activity and stimulating osteoblast growth induced by the combination of Aloe vera and XCB.

MeSH terms

  • Aloe*
  • Alveolar Process / growth & development*
  • Animals
  • Cancellous Bone / transplantation*
  • Cattle
  • Collagen Type I / metabolism
  • Guinea Pigs
  • Heterografts
  • Male
  • Osteogenesis*
  • Osteoprotegerin / metabolism
  • Signal Transduction*
  • Toll-Like Receptor 2 / metabolism*
  • Tooth Socket
  • Tumor Necrosis Factor-alpha / metabolism

Substances

  • Collagen Type I
  • Osteoprotegerin
  • Toll-Like Receptor 2
  • Tumor Necrosis Factor-alpha