TY - JOUR AU - Ripamont, Ugo PY - 2021/07/31 Y2 - 2024/03/28 TI - The induction of bone formation: From bone morphogenetic proteins to the transforming growth factor-β3 protein - Redundancy, pleiotropy and the induction of cementogenesis JF - South African Dental Journal JA - S. Afr. dent. j. VL - 76 IS - 06 SE - Research Articles DO - 10.17159/2519-0105/2021/v76no6a4 UR - https://journals.assaf.org.za/index.php/sadj/article/view/12100 SP - 331-356 AB - <p>This review proposes to translate organogenesis and the induction of bone formation by the recombinant human <br>transforming growth factor-β3 (hTGF-β3 ) in the Chacma baboon Papio ursinus to periodontal tissue induction and <br>regeneration. Naturally derived highly purified osteogenic proteins of the transforming growth factor-β (TGF-β) supergene family <br>were implanted in Class II furcation defects of the first and second mandibular molars. Additional defects in P.<br>ursinus were treated with recombinant human osteogenic protein-1 (hOP-1, also known as bone morphogenetic<br>protein-7, hBMP-7) and hBMP-2, singly or in binary applications. In different studies defects were also implanted with hTGF-β3<br>singly or in binary application with hOP-1. Harvested specimens on day 60 and 180 were processed for undecalcified histology using tungsten-carbide knives mounted on Polycut sledge’ micro-tomes or the Exakt precision cutting and grinding system.<br>Highly purified osteogenic proteins showed the induction of Sharpey’s fibres into newly formed cementoid with foci of mineralization. hOP-1 induced substantial cementogenesis whilst hBMP-2 preferentially induced alveolar bone. Intramuscular implantation of hTGF-β3 absorbed onto coral-derived macroporous bioreactors engineered large heterotopic multicellular bone organoids. Gene expression pathways by quantitative Reverse Transcription Polymerases Chain Reaction (qRT-PCR) show <br>that the induction of bone is via several profiled BMPs and TGF-βs expressed upon implantation of hTGF-β3 recapitulating the synergistic induction of bone as shown by binary applications of low doses of hTGF-β1 and hTGF-β3with hOP-1. The rapid induction of bone by hTGF-β3 provides theframework for a paradigmatic shift from recombinanthBMPs to hTGF-β3 in clinical contexts, provocatively operational in periodontal tissue regeneration with substantial induction of cementogenesis in angiogenesis.</p> ER -