Biomedical subjects

G Bordet

Publications and source records attributed to G Bordet.

11 recordsLinked to original sources

PubMed1984

[Intramandibular segment of Meckel's cartilage in the rabbit embryo. Its cytological expression and osteogenetic fate].

Meckel's cartilage undergoes typical endochondral ossification within a model of the mandible, the ossification of which is then intramembranous. The concurrent development of two different osteogenetic processes in the 28 day-old rabbit embryo results in the formation of a single bony framework. These observations are based upon the assumption that Meckel's cartilage is not merely a supportive, primitive shaft without a definite ontogenetic future role, but rather an active participant in mandibular osteogenesis.

Animals↗

PubMed1983

[Immunologic distribution of collagens during the embryogenesis of the secondary palate in the Fauve de Bourgogne rabbit].

The distribution of collagens during development of the palate in the Rabbit embryo is studied using the technique of indirect immunofluorescence. During the phase prior to epithelial contact, only types II and III are found in the mesenchyme. Type I, which is abundant on the free surface of apical epithelial cells, becomes even denser at the time when the palatine projections unite. Type IV fluorescence clearly outlines the basement membrane. When epithelial development regresses, fluorescence in type I and IV decreases in a way such that, in the areas where mesenchymal coalescence is apparent, no immunofluorescent labeling is observed.

Animals↗

PubMed1981

[Ultrastructural analysis of the supralingual growth of the palatine processes in Oryctolagus cuniculus (Burgundy brown rabbit)].

During the period between 17 days and 17 days 6 hours, the palatal processes position themselves above the dorsal aspect of the tongue. Between 17 days 6 hours and 17 days 12 hours, they continue their growth in a horizontal plane. The degeneration of the epithelial cells of the future contact zone has already started and is materialized by the presence of an atypical nucleolus. In the zone where the median extremities of the palatal processes are near each other, the basal lamina is discontinuous. The restructuring of the underlying mesenchyme is characterized by a concentration of cells along the partially regressed basal lamina, a regression of the adjacent collagenous fibres, and by the appearance of numerous clasmatose vesicles. The microvilli situated particularly in the free extremities of the palatal processes can be interpreted as epithelial adhesive factors and as a means of anchorage; this would intervene later when the palatal processes come into contact. In addition, the adhesive phenomenona could depend on the presence of a glycoproteic surface coating corresponding to the cell-coat of the cell periphery.

Animals↗

PubMed1978