title: [Polyethylene glycol-thiosulfate (PEG-Th) staining--a modification of the AgNOR method].
abstract: Visualization and analysis of nucleolus organizer regions (NOR) by a silverstaining is a well accepted method in cytological and histological tumor diagnostic. For specific staining of the NOR the AgNOR-method developed by HOWELL and BLACK (1980) and PLOTON et al. (1986) is performed. One major disadvantage of the AgNOR-method is the instability of the reaction products and therefore the short durability of the slide preparations. A modification of the AgNOR-method, the PEG-Th-staining, leads not only to a longer durability of the reaction products but also to a better contrast within the sections. Main characteristic of the PEG-Th-staining is a postfixation of the specific silver precipitations for 5 min in a 5% sodium thiosulfate solution. It could be proven by image analysis that there is no significant difference between the morphometric parameters evaluated on AgNOR- and PEG-Th-stained sections. Therefore results evaluated on PEG-Th-stained sections are absolutely comparable to those obtained on sections stained with the AgNOR-method thus providing the advantage of a longer durability of the reaction products and easier evaluation.
authors.affiliation: Institut für Veterinär-Pathologie, Giessen, Deutschland.
authors.forename: C V
authors.initials: CV
authors.lastname: Löhr
authors.forename: D
authors.initials: D
authors.lastname: Driemeier
authors.forename: J P
authors.initials: JP
authors.lastname: Teifke
mesh_terms: D004396:Coloring Agents; D006390:Hemangioendothelioma / Q000648:ultrastructure*; D006652:Histological Techniques; D006801:Humans; D009697:Nucleolus Organizer Region / Q000648:ultrastructure*; D011092:Polyethylene Glycols; D012834:Silver; D013194:Staining and Labeling; D013885:Thiosulfates
chemical_list: D004396:Coloring Agents; D013885:Thiosulfates; D012834:Silver; D011092:Polyethylene Glycols