Resumo

CARRETERO, CONSTANZA et al. BIOCOMPATIBILITY EVALUATION OF CARBONATED APATITE OF DRY SYNTHESIS THROUGH PORCINE OSTEOPROGENITORS CULTURE. rev.fac.med [online]. 2009, vol.17, n.2, pp.231-244. ISSN 0121-5256.

The development of new materials for bone regeneration constitutes a challenge for biomedical sciences, especially when it is desirable to design synthetic materials that simulate the most the composition of natural bone. In this work biocompatibility of carbonated apatite (CAp) was evaluated. CAp was prepared through mechano-chemical mixing, compression and sintered at high temperature (referred as dry synthesis) of powdered precursors. This ceramic was then used as a substrate for the culture of porcine osteogeprogenitors. Cells were obtained from the bone marrow of adult porcine just after sacrifice by series of dilutions. Cells were then cultured onto culture plates or onto CAp, with and without addition of known differentiation osteogenic factors. Cultures were carried out for 45 days during which the doubling time of the culture was determined as well as the osteoconductivty of CAp, by means of determining some biochemical and molecular markers. A primary culture of porcine bone marrow osteoprogenitor was established and was used for the in vitro evaluation of a ceramic material synthetised by solid state reaction. The potential use of the material as a substitute for natural bone implant was explored, by analysing its osteoconductive capacity, through light and electron microscopy and expression of biochemical and molecular markers, such as the expression of alkaline phosphatase, calcium deposition and xylenol orange accumulation, concomitant with detection of Runx2, osteocalcin and osteopontin.

Palavras-chave : bioceramics; carbonated apatite; mesenchymal stem cells; bone marrow.

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