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Journal of Virology, August 2006, p. 7799-7806, Vol. 80, No. 16
0022-538X/06/$08.00+0 doi:10.1128/JVI.00318-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.
Isolation and Characterization of Monoclonal Antibodies Which Neutralize Human Metapneumovirus In Vitro and In Vivo
Nancy D. Ulbrandt,1*
Hong Ji,1
Nita K. Patel,1
Jeffrey M. Riggs,1
Yambasu A. Brewah,1
Shannon Ready,1
Nanci E. Donacki,1
Karyn Folliot,1
Arnita S. Barnes,1
Kannaki Senthil,1
Susan Wilson,1
Mingzhong Chen,1
Lori Clarke,1
Mia MacPhail,2
Jia Li,1
Robert M. Woods,1
Kathy Coelingh,2
Jennifer L. Reed,1
Michael P. McCarthy,1
David S. Pfarr,1
Albert D. M. E. Osterhaus,3
Ron A. M. Fouchier,3
Peter A. Kiener,1 and
JoAnn A. Suzich1
MedImmune, Inc., 1 MedImmune Way, Gaithersburg, Maryland
20878,1
MedImmune Vaccines, 319 North
Bernardo Ave., Mountain View, California 94043,2
Department of Virology,
Erasmus Medical Center, Rotterdam, The Netherlands3
Received 14 February 2006/
Accepted 23 May 2006
Human metapneumovirus (hMPV) is a recently described member of the
Paramyxoviridae family/Pneumovirinae subfamily and
shares many common features with respiratory syncytial virus (RSV),
another member of the same subfamily. hMPV causes respiratory tract
illnesses that, similar to human RSV, occur predominantly during the
winter months and have symptoms that range from mild to severe cough,
bronchiolitis, and pneumonia. Like RSV, the hMPV virus can be
subdivided into two genetic subgroups, A and B. With RSV, a single
monoclonal antibody directed at the fusion (F) protein can prevent
severe lower respiratory tract RSV infection. Because of the high level
of sequence conservation of the F protein across all the hMPV
subgroups, this protein is likely to be the preferred antigenic target
for the generation of cross-subgroup neutralizing antibodies. Here we
describe the generation of a panel of neutralizing monoclonal
antibodies that bind to the hMPV F protein. A subset of these
antibodies has the ability to neutralize prototypic strains of both the
A and B hMPV subgroups in vitro. Two of these antibodies exhibited
high-affinity binding to the F protein and were shown to protect
hamsters against infection with hMPV. The data suggest that a
monoclonal antibody could be used prophylactically to prevent lower
respiratory tract disease caused by
hMPV.
* Corresponding author. Mailing address: MedImmune, Inc., 1 MedImmune Way,
Gaithersburg, MD 20878. Phone: (301) 398-4495. Fax: (301) 398-9495.
E-mail:
ulbrandtn{at}medimmune.com.
Journal of Virology, August 2006, p. 7799-7806, Vol. 80, No. 16
0022-538X/06/$08.00+0 doi:10.1128/JVI.00318-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.
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