Swedish
Albanian
Arabic
Armenian
Azerbaijani
Belarusian
Bengali
Bosnian
Catalan
Czech
Danish
Deutsch
Dutch
English
Estonian
Finnish
Français
Greek
Haitian Creole
Hebrew
Hindi
Hungarian
Icelandic
Indonesian
Irish
Italian
Japanese
Korean
Latvian
Lithuanian
Macedonian
Mongolian
Norwegian
Persian
Polish
Portuguese
Romanian
Russian
Serbian
Slovak
Slovenian
Spanish
Swahili
Swedish
Turkish
Ukrainian
Vietnamese
Български
中文(简体)
中文(繁體)
Acta anatomica 1991

Changes in lectin-binding patterns during late fetal development of the rat colon.

Endast registrerade användare kan översätta artiklar
Logga in Bli medlem
Länken sparas på Urklipp
R R Hill
G de Bruyn

Nyckelord

Abstrakt

Lectin-binding and histochemical studies were integrated with a morphological description of colon development in rat fetuses to determine whether changes in glycoprotein sugars could be identified with stages of colon organogenesis. At 16 days gestation the colon consisted of a minute lumen surrounded by 3-5 layers of cuboidal, stratified epithelium, a basement membrane and undifferentiated mesenchyme. As development proceeded, epithelial spaces eventually fused with the main lumen, and fingers of mesenchyme, with a basement membrane and epithelial mantle, formed the walls of crypts lined with simple to stratified columnar cells. Goblet cells and mucin production appeared only on the 20th-21st day of gestation. Mesenchyme differentiation to a circular muscle band, the prospective tunica muscularis, occurred on days 17-18, and vascularization of the lamina propria was first detected on day 19. Wheat germ agglutinin (WGA) lectin bound avidly to sugar residues in the mesenchyme matrix from day 16 but weakened as the tissue differentiated, particularly into smooth muscle. Alcian blue staining of the matrix, also weakening with time, confirmed the sialic acid nature of binding sites for WGA on matrix acid mucopolysaccharides. Under controlled conditions, WGA also detected N-acetylglucosamine-binding sites on brush borders as they developed on the apical surface of primitive enterocytes. Ulex lectin bound to fucose residues of Alcian-blue-positive, PAS-positive mucin from the first appearance of goblet cells. Concanavalin A and glycine max lectins bound only to blood group substances on both nucleated red cells between days 16 and 19 and anucleate red cells from day 19.(ABSTRACT TRUNCATED AT 250 WORDS)

Gå med på vår
facebook-sida

Den mest kompletta databasen med medicinska örter som stöds av vetenskapen

  • Fungerar på 55 språk
  • Växtbaserade botemedel som stöds av vetenskap
  • Örter igenkänning av bild
  • Interaktiv GPS-karta - märka örter på plats (kommer snart)
  • Läs vetenskapliga publikationer relaterade till din sökning
  • Sök efter medicinska örter efter deras effekter
  • Organisera dina intressen och håll dig uppdaterad med nyheterna, kliniska prövningar och patent

Skriv ett symptom eller en sjukdom och läs om örter som kan hjälpa, skriv en ört och se sjukdomar och symtom den används mot.
* All information baseras på publicerad vetenskaplig forskning

Google Play badgeApp Store badge