title: Strongyloides venezuelensis: longitudinal distribution of adult worms in the host intestine is influenced by mucosal sulfated carbohydrates.
abstract: Mechanisms for the longitudinal distribution of parasitic females of Strongyloides venezuelensis in the host intestine were investigated in mice. Adult worms were mostly recovered from the anterior-most one-third of the small intestine throughout the infection after infective larvae inoculation. Surgically implanted adult worms established well in the small intestinal mucosa, either in the duodenum or in the ileum, whereas a few worms could establish in the large intestine. Implanted worms in the small intestine remained where they were implanted until expelled. Mucosal mast cells were induced in the whole small intestine after the worm implantation. In the large intestine, a considerable number of adult worms settled in the mucosa of mutant mice, whose goblet cell mucins were undersulfated because of a mutation in sulfate-activating enzymes. In these mice, the degree of sulfation of goblet cell mucins in the large intestine was significantly reduced to the level of normal small intestine goblet cell mucins. Our results suggest that sulfated glycoconjugates, either from mucosal mast cells or goblet cells, have important effects on the longitudinal distribution of parasitic females of S. venezuelensis.
authors.affiliation: Department of Molecular Parasitology, Nagoya City University Graduate School of Medical Sciences, Kawasumi-1, Mizuho, Nagoya 467-8601, Japan. maruyama@med.nagoya-cu.ac.jp
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Maruyama
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Hirabayashi
authors.forename: Mohamed
authors.initials: M
authors.lastname: el-Malky
authors.forename: Sou
authors.initials: S
authors.lastname: Okamura
authors.forename: Mikiko
authors.initials: M
authors.lastname: Aoki
authors.forename: Tadashi
authors.initials: T
authors.lastname: Itagaki
authors.forename: Fukumi
authors.initials: F
authors.lastname: Nakamura-Uchiyama
authors.forename: Yukifumi
authors.initials: Y
authors.lastname: Nawa
authors.forename: Shoichi
authors.initials: S
authors.lastname: Shimada
authors.forename: Nobuo
authors.initials: N
authors.lastname: Ohta
mesh_terms: D000818:Animals; D050260:Carbohydrate Metabolism; D005243:Feces / Q000469:parasitology; D005260:Female; D020397:Goblet Cells / Q000737:chemistry; D007413:Intestinal Mucosa / Q000737:chemistry* / Q000166:cytology / Q000469:parasitology; D007422:Intestines / Q000469:parasitology*; D008297:Male; D008407:Mast Cells / Q000737:chemistry; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D009077:Mucins / Q000378:metabolism; D010270:Parasite Egg Count; D011509:Proteoglycans / Q000378:metabolism; D013321:Strongyloides / Q000472:pathogenicity*; D013322:Strongyloidiasis / Q000469:parasitology; D013431:Sulfates / Q000378:metabolism*
chemical_list: D009077:Mucins; D011509:Proteoglycans; D013431:Sulfates