title: [Alkaline phosphatase activity of the bursa of Fabricius: histochemical study in the normal embryo and during allograft reactions].
abstract: Alkaline phosphatase activity allows a certain discrimination between lympho-inhibition following a direct action on the lymphoid stem cells or a modification of mesenchyme/epithelium interactions; in this study we have compared the evolution of this activity in untreated chick embryos and in chick embryos following graft-versus-host-reactions. The important decrease of mesenchyme alkaline phosphatase activity induced here, involves a localisation of allograft reaction in this tissue; this result does not agree with the former explanations about a direct action on the lymphoid stem cells.
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism*; D000818:Animals; D002060:Bursa of Fabricius / Q000201:enzymology*; D002642:Chick Embryo; D002645:Chickens; D006087:Graft vs Host Reaction; D013154:Spleen / Q000637:transplantation; D014184:Transplantation, Homologous
chemical_list: D000469:Alkaline Phosphatase
vernacular_title: L'activité phosphatasique alcaline de la bourse de Fabricius: étude histochimique chez l'embryon normal et au cours des réactions d'allogreffes.