title: Modifications of carbohydrate residues and ZP2 and ZP3 glycoproteins in the mouse zona pellucida after fertilization.
abstract: Oligosaccharide side chains of zona pellucida (ZP) glycoproteins play a key role in the sperm-egg interaction phenomena during fertilization. In the present study, modifications of the ZP glycoproteins during the fertilization process in the mouse were studied by the lectin-gold technique and immunocytochemistry in conjunction with quantitative analysis. Binding of PNA, RCA I, DSA, LFA, MAA, AAA, and anti-ZP2 and anti-ZP3 antibodies was observed throughout the ZP of both unfertilized and fertilized eggs. However, HPA and BSAIB4 labeling was found only in the inner region of the ZP. After neuraminidase treatment (Neu), HPA showed an affinity for the entire ZP. Labeling by LFA, WGA, MAA, PNA, BSAIB4, and AAA decreased in the ZP of fertilized eggs; however, there was an increase in the binding of RCA I. HPA and Neu-HPA increased only in the inner region of the ZP. Immunoreactivity to antibodies against ZP2 and ZP3 also decreased after fertilization. The present results demonstrate that 1) terminal carbohydrate residues contained in the ZP glycoproteins are modified after fertilization and 2) inner and outer regions of the ZP contain different oligosaccharide side chains.
authors.affiliation: Department of Anatomy and Cell Biology, Faculty of Medicine, Queen's University, Kingston, Ontario, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Avilés
authors.forename: L
authors.initials: L
authors.lastname: Jaber
authors.forename: M T
authors.initials: MT
authors.lastname: Castells
authors.forename: J
authors.initials: J
authors.lastname: Ballesta
authors.forename: F W
authors.initials: FW
authors.lastname: Kan
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000737:chemistry; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000737:chemistry; D004527:Egg Proteins / Q000737:chemistry / Q000378:metabolism*; D005260:Female; D005306:Fertilization / Q000502:physiology*; D005692:Galactose Oxidase / Q000378:metabolism; D007091:Image Processing, Computer-Assisted; D007150:Immunohistochemistry; D007202:Indicators and Reagents; D037102:Lectins; D008562:Membrane Glycoproteins / Q000737:chemistry / Q000378:metabolism*; D051379:Mice; D009439:Neuraminidase / Q000737:chemistry; D009865:Oocytes / Q000737:chemistry / Q000378:metabolism; D011247:Pregnancy; D011956:Receptors, Cell Surface; D015044:Zona Pellucida / Q000378:metabolism*; D000072216:Zona Pellucida Glycoproteins
chemical_list: D000911:Antibodies, Monoclonal; D002241:Carbohydrates; D004527:Egg Proteins; D007202:Indicators and Reagents; D037102:Lectins; D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; D000072216:Zona Pellucida Glycoproteins; C000606520:Zp2 protein, mouse; C000606521:Zp3 protein, mouse; D005692:Galactose Oxidase; D009439:Neuraminidase