title: Differences in oligosaccharide pattern of a sample of polar bear colostrum and mid-lactation milk.
abstract: Although the concentrations of carbohydrate in the colostrum and in the mid-lactation milk of polar bear (Ursus maritimus) were similar, the oligosaccharide patterns differed. The colostrum sample contained Neu5Ac(alpha2-3)Gal(beta1-4)Glc (3'-N-acetylneuraminyllactose), GalNAc(alpha1-3)[Fuc(alpha1-2)]Gal(beta1-4)Glc (A-tetrasaccharide), Fuc(alpha1-2)Gal(beta1-4)Glc (2'-fucosyllactose) and Gal(beta1-4)Glc (lactose). The mid-lactation milk contained Gal(alpha1-3)[Fuc(alpha1-2)]Gal(beta1-4)[Fuc(alpha1-3)]Glc (B-pentasaccharide), GalNAc(alpha1-3)[Fuc(alpha1-2)]Gal(beta1-4)[Fuc(alpha1-3)]Glc (A-pentasaccharide), Gal(alpha1-3)[Fuc(alpha1-2)]Gal(beta1-4)Glc (B-tetrasaccharide), A-tetrasaccharide, Gal(alpha1-3)Gal(beta1-4)[Fuc(alpha1-3)]Glc (3-fucosylisoglobotriose), Gal(alpha1-3)Gal(beta1-4)Glc (isoglobotriose) and lactose. The dominant saccharides in the colostrum were 3'-N-Acetylneuraminyllactose and lactose, whereas isoglobotriose was the dominant saccharide in the mid-lactation milk in which lactose was only a minor component. Isoglobotriose, which had previously been found to be a dominant saccharide in mature milk from the Ezo brown bear, the Japanese black bear and the polar bear, was not found in the polar bear colostrum.
authors.affiliation: Department of Animal Science, Obihiro University of Agriculture and Veterinary Medicine, Inada cho, Hokkaido, Obihiro 080-8555, Japan. urashima@obihiro.ac.jp
authors.forename: Tadasu
authors.initials: T
authors.lastname: Urashima
authors.forename: Hiromi
authors.initials: H
authors.lastname: Nagata
authors.forename: Tadashi
authors.initials: T
authors.lastname: Nakamura
authors.forename: Ikichi
authors.initials: I
authors.lastname: Arai
authors.forename: Tadao
authors.initials: T
authors.lastname: Saito
authors.forename: Koji
authors.initials: K
authors.lastname: Imazu
authors.forename: Teruaki
authors.initials: T
authors.lastname: Hayashi
authors.forename: Andrew E
authors.initials: AE
authors.lastname: Derocher
authors.forename: Oystein
authors.initials: O
authors.lastname: Wiig
mesh_terms: D000818:Animals; D003126:Colostrum / Q000737:chemistry*; D005260:Female; D007774:Lactation / Q000502:physiology*; D008279:Magnetic Resonance Imaging; D008892:Milk / Q000737:chemistry*; D009844:Oligosaccharides / Q000032:analysis* / Q000737:chemistry*; D001503:Ursidae
chemical_list: D009844:Oligosaccharides