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Early proliferation of bone marrow mononuclear cells on collagen membrane, bone graft and tooth cementum / Proliferación temprana de células mononucleares de médula óseasobre membrana de colágeno, injerto óseo y cemento dentario
Milagres, Débora; Rueff-Barroso, Carlos R; Carvalho, Simone N; Carvalho, Laís de; Monte-Alto-Costa, Andréa; Fischer, Ricardo G; Porto, Luís Cristóvão.
  • Milagres, Débora; Rio de Janeiro State University. Department of Periodontics. Rio de Janeiro. BR
  • Rueff-Barroso, Carlos R; Rio de Janeiro State University. Department of Histology and Embryology. Laboratory of Tissue Repair. Rio de Janeiro. BR
  • Carvalho, Simone N; Rio de Janeiro State University. Department of Histology and Embryology. Laboratory of Cell Culture. Rio de Janeiro. BR
  • Carvalho, Laís de; Rio de Janeiro State University. Department of Histology and Embryology. Laboratory of Cell Culture. Rio de Janeiro. BR
  • Monte-Alto-Costa, Andréa; Rio de Janeiro State University. Department of Histology and Embryology. Laboratory of Tissue Repair. Rio de Janeiro. BR
  • Fischer, Ricardo G; Rio de Janeiro State University. Department of Periodontics. Rio de Janeiro. BR
  • Porto, Luís Cristóvão; Rio de Janeiro State University. Department of Histology and Embryology. Laboratory of Tissue Repair. Rio de Janeiro. BR
Int. j. morphol ; 27(4): 1249-1256, dic. 2009. ilus
Article in English | LILACS | ID: lil-582080
ABSTRACT
The ultimate goal of periodontal therapy is to repair the damaged periodontal supporting tissues, permitting regeneration of the periodontal ligament. However, the cell response, the supportive matrix and the bioactive molecules use have not yet been well established. Bone marrow mononuclear cells were extracted from rat femurs and tibiae and cultured on a cross-linked collagen membrane, bone graft, or molar tooth to compare cell attachment and early proliferation on these materials. Cell attachment was quantified by light microscopy at 24, 48 and 72h, and cell proliferation was observed under a SEM after 72h. After 24h, the number of cells on bone graft was similar to that of the control and more than twice compared to collagen membrane (q=7.473 p<0.001) and 1.75 times greater than with tooth cementum (q=5.613 p<0.01). However, the number of cells close to bone graft decreased in the second day compared to the control. SEM examination revealed a significant decrease in the number of cells that attached and proliferated on tooth and bone graft when compared with membrane. The results showed that bone marrow mesenchymal cells offer great potential for colonize a collagen membrane.
RESUMEN
El objetivo último de la terapia periodontal es reparar el daño tejidos periodontales de soporte, permitiendo la regeneración del ligamento periodontal. Sin embargo, la respuesta de la célula, la matriz de apoyo y las moléculas bioactivas aún no han sido bien establecidas. Células mononucleares de la médula ósea se extrajeron del fémur y fibula de rata, y fueron cultivadas sobre un reticulado de membrana de colágeno, de injerto de hueso o de un diente molar para comparar la adhesión celular y la proliferación temprana sobre estos materiales. La adhesión celular fue cuantificada por microscopía de luz a las 24, 48 y 72h, y la proliferación celular fue observada bajo MEB después de 72h. Después de 24 horas, el número de células sobre el injerto de hueso fue similar a la del control y más del doble en comparación con la membrana de colágeno (q=7,473 p<0,001) y 1,75 veces mayor que con el cemento dental (q=5,613 p<0,01). Sin embargo, el número de células cerca del injerto óseo disminuyó el segundo día en comparación con el control. El examen al MEB reveló una disminución significativa en el número de células que se unen y proliferan sobre los dientes y el injerto óseo en comparación con la membrana. Los resultados mostraron que las células mesenquimales de la médula ósea tienen un gran potencial para colonizar la membrana de colágeno.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Stem Cells / Collagen / Bone Transplantation / Dental Cementum / Cell Proliferation / Membranes, Artificial Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: Rio de Janeiro State University/BR

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Full text: Available Index: LILACS (Americas) Main subject: Stem Cells / Collagen / Bone Transplantation / Dental Cementum / Cell Proliferation / Membranes, Artificial Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: Rio de Janeiro State University/BR