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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

An effective fixative for glucocorticoid receptors in fetal tissues.

As a preliminary study in an autoradiographic study of glucocorticoid (GC) receptor localization in orofacial tissues of mouse fetuses, a search was made to determine the most effective fixative for preservation of the GC-receptor complex. Twelve-day-old mouse fetuses were administered tritiated triamcinolone acetonide (3H-TAC) intraamniotically and subsequently processed by one of the following three procedures: freeze-drying, prefixation with Karnovsky's fixative, or "the catechin fixative" (Karnovsky's fixative containing 1% D-catechin) and postfixation with osmium tetroxide. Light microscopic autoradiography and liquid scintillation counting of the specimens revealed that the catechin fixative gave the best results for fixation of the steroid-receptor complex and preservation of tissue structure. Light and electron microscopic autoradiographic studies of the time course of the localization of 3H-TAC in palatal shelves supported the catechin fixative as being the most effective in preservation of GC-receptor or ligand complexes.[1]


  1. An effective fixative for glucocorticoid receptors in fetal tissues. Koga, T., Kurisu, K. J. Craniofac. Genet. Dev. Biol. (1982) [Pubmed]
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