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Journal of Virology, October 2000, p. 9300-9305, Vol. 74, No. 19
Department of Veterinary Public Health, Faculty of
Agriculture, Tottori University, Tottori
680-8553,1 Department of Biochemistry,
University of Shizuoka, School of Pharmaceutical Science, Shizuoka
422-8002,2 Laboratory of Microbiology,
Department of Disease Control, Graduate School of Veterinary
Medicine, Hokkaido University, Sapporo
060-0818,3 Department of Veterinary
Microbiology, College of Agriculture, Osaka Prefecture University,
Sakai 599-6231,4 Department of
Applied Bioorganic Chemistry, Gifu University, Gifu
501-1193,6 and Institute of Medical
Science, University of Tokyo, Minato-ku, Tokyo
108-8639,7 and Department of
Pathobiological Sciences, School of Veterinary Medicine, University
of Wisconsin
Received 17 December 1999/Accepted 16 May 2000
The hemagglutinin (HA) of H3 human influenza viruses does not
support viral replication in duck intestine despite its avian origin. A
Leu-to-Gln mutation at position 226 and a Ser-to-Gly mutation at
position 228 in the HA of human A/Udorn/307/72 (H3N2) permit a
reassortant virus [human Udorn HA, with all other genes from
A/mallard/New York/6750/78 (H2N2)] to replicate in ducks. To
understand the molecular basis of this change in host range restriction, we investigated the receptor specificity of duck influenza
viruses as well as of human-duck virus reassortants. The results
indicate that the recognition of a glycoconjugate moiety possessing
N-glycolneuramic acid (NeuGc) linked to galactose by the
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Recognition of N-Glycolylneuraminic Acid
Linked to Galactose by the
2,3 Linkage Is Associated with
Intestinal Replication of Influenza A Virus in Ducks
Madison, Madison, Wisconsin 537065
2,3 linkage (NeuGc
2,3Gal) is associated with viral replication in
duck intestine. Immunofluorescence assays with NeuGc
2,3Gal-specific antiserum detected this moiety primarily on the crypt epithelial cells
of duck colon. Such recognition, together with biochemical evidence of
NeuGc in crypt cells, correlated exactly with the ability of the virus
to replicate in duck colon. These results suggest that recognition of
the NeuGc
2,3-Gal moiety plays an important role in the enterotropism
of avian influenza viruses.
*
Corresponding author. Mailing address: Department of
Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin
Madison, 2015 Linden Dr. West, Madison, WI 53706. Phone: (608) 265-4925. Fax: (608) 265-5622. E-mail:
kawaokay{at}svm.vetmed.wisc.edu.
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