Osteoinduction in the palatal submucosa by injecting BMP-2 on 2 different carriers.
J Craniofac Surg
; 23(2): 594-8, 2012 Mar.
Article
em En
| MEDLINE
| ID: mdl-22446423
ABSTRACT
In this work, we investigated the ability of injected recombinant human bone morphogenetic protein 2 (rhBMP-2) on brushite cement (a ß-tricalcium phosphate-based biomaterial) and collagen gel as carriers to induce osteogenic differentiation in the palatal submucosa of 10-day-old rats. This was part of a broader study aiming to create bone in the palatal submucosa at cleft palate edges in the search for a minimally invasive treatment. Thirteen treated animals, 7 with rhBMP-2/brushite cement and 6 with rhBMP-2/collagen gel, were injected with 5 to 10 µL of each biomaterial in the right palatal submucosa at the level between the second and third rugae. The contralateral site was uninjected and served as the control. Six weeks after injection, both brushite cement and collagen gel were histologically unrecognizable in all treated animals. New bone structures such as ossicles of woven bone were not detected. However, an augmentation in the thickness of the palatal fibromucosa was observed at the injection site of all palates. In addition, immunolabeling for osteopontin, proliferating cell nuclear antigen, and TUNEL revealed intense osteogenic induction at the injection site with both constructs, which was negative in the control site from the same specimens; no differences regarding cell proliferation and death were observed. The present study confirms the feasibility of generating osteogenic cells in the palatal submucosa by injecting low doses of rhBMP-2 in these 2 biomaterials, together with their inability to form bone.
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
6_ODS3_enfermedades_notrasmisibles
Base de dados:
MEDLINE
Assunto principal:
Osteogênese
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Fosfatos de Cálcio
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Fator de Crescimento Transformador beta
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Colágeno
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Palato Duro
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Proteína Morfogenética Óssea 2
Limite:
Animals
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Humans
Idioma:
En
Revista:
J Craniofac Surg
Ano de publicação:
2012
Tipo de documento:
Article