Quantitative assessment of angiogenesis and osteogenesis after transplantation of bone. Comparison of isograft and allograft bone in mice

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Détails sur la publication

Liste des auteurs: Sckell A
Année de publication: 1999
Numéro du volume: 70
Numéro de publication: 4
Page d'accueil: 374
Dernière page: 380
Nombre de pages: 7
Languages: Anglais-Royaume-Uni (EN-GB)


Résumé

We performed a vital microscopic study in mice bearing dorsal skinfold
chambers to characterize microvascular perfusion and
leukocyte/endothelium interaction and their effects on elongation and
mineralization of neonatal isograft and allograft bone. Isograft (C57/BL
to C57/BL) and allograft bone (C57/BL to BALB/C) revascularized
simultaneously. However, vascular perfusion and density were lower in
allograft bone than in isograft bone. Leukocyte/endothelium interaction
was the same in isograft and allograft bones. Revascularization was not
detected in allograft bone transplanted to presensitized recipients.
Moreover, in preexisting vessels at the transplantation site,
leukocyte/endothelium interaction was altered in allograft bone of
presensitized recipients, despite a normal systemic leukocyte count.
Femoral growth resulting from thickening of both epiphyses did not
differ between experimental groups, however, mineralization occurred in
isograft bone only. Isograft bone was histologically intact, allograft
bone hypovital and allograft bone in presensitized recipients necrotic
12 days after implantation. Our findings suggest that graft
incorporation or rejection is mediated by the microvasculature and that
presensitizing of recipients accelerates rejection of allograft bone.


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