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. 1988 Sep;43(3):155-61.
doi: 10.1007/BF02571313.

Immunohistochemical localization of osteonectin in developing human and calf bone using monoclonal antibodies

P Bianco  1 , G Silvestrini, J D Termine, E Bonucci
Affiliations

Immunohistochemical localization of osteonectin in developing human and calf bone using monoclonal antibodies

P Bianco et al. Calcif Tissue Int. 1988 Sep.

Abstract

Osteonectin was immunolocalized in human fetal and calf neonatal developing bone using newly developed monoclonal antibodies. The protein was localized to the cytoplasm of osteoblasts and young osteocytes. In bone matrix, strong reactivity was found in newly laid down osteoid. Bone matrix immunoreactivity was enhanced by pretreatment of sections with proteases, possibly because of an unmasking of epitopes engaged in protein-protein interactions. Osteonectin immunoreactivity was also found in preosteoblasts in all types of human fetal osteogenesis (membranous, endochondral, subperiosteal, and mantellar (Meckel's cartilage) ossification), and in some chondrocytes of metaphyseal growth plate, possibly modulating towards an osteoblastic phenotype.

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