2012 Fiscal Year Final Research Report
Determination of the role of anti-flavivirus antibody in antibody-dependent enhancement infection of dengue virus
Project/Area Number |
23790515
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Virology
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Research Institution | National Institute of Infectious Diseases |
Principal Investigator |
MOI Meng ling 国立感染症研究所, ウイルス第一部, 研究員 (40597499)
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Project Period (FY) |
2011 – 2012
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Keywords | 感染防御・抑制 / 診断・治療 / 感染免疫 |
Research Abstract |
In this study the role of anti-flavivirus antibodies during antibody-dependent enhancement of dengue virus (DENV) infection was characterized by using FcγR-expressing cells. Infection-enhancement antibody enhances dengue virus (DENV) replication in FcγR-expressing cells, contributing to high levels of viral replication during secondary infection; a prelude of severe DENV illness. The neutralizing and infection-enhancement activity of antibodies after dengue virus (DENV) infection, Japanese encephalitis virus (JEV) infection and JE vaccination was determined in this study. Using FcγR-expressing cells, serum samples from the early phase of DENV infection exhibited ADE activity but serum samples from late phase of DENV infection exhibited DENV neutralizing activity. Serum sample from a JEV patient exhibited ADE activity during the late phase of JEV infection. Additionally, serum samples from JEV vaccinees exhibited DENV cross-reactive IgG antibodies after JEV vaccination, but neutralizing activity to DENV was absent. The results suggest that other than DENV, flavivirus infection and vaccination also induce cross-reactive antibodies to DENV but cross-neutralizing activity may be low or absent, implying a role of these anti-flavivirus antibodies during DENV infection.
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Research Products
(28 results)
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[Journal Article] Changes in hematological and serum biochemical parameters in common marmosets (Callithrix jacchus) after inoculation with dengue virus.2012
Author(s)
Omatsu T, Moi ML, Takasaki T, Nakamura S, Katakai Y, Tajima S, Ito M, Yoshida T, Saito A, Akari H, Kurane I
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Journal Title
Journal of Medical Primatology
Volume: 41,5
Pages: 289-296
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[Journal Article] アフリカからのデング熱輸入例2011
Author(s)
Moi ML, Takasaki T, Iwagoe H, Sakamoto M, Kobayashi K, Ujiie M.
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Journal Title
Infectious Agents Surveillance Report
Volume: 32 (6)
Pages: 164-165
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[Journal Article] Common marmoset (Callithrix jacchus) as a primate model of dengue virus infection: development of high levels of viremia and demonstration of protective immunity.2011
Author(s)
Omatsu T, Moi ML, Hirayama T, Takasaki T, Nakamura S, Tajima S, Ito M, Yoshida T, Saito A, Katakai Y, Akari H, Kurane I.
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Journal Title
Journal of General Virology.
Volume: 92
Pages: 2272-2280
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[Presentation] Serological evidence of the co-circulation of multiple dengue virus serotypes in Kuala Lumpur, Malaysia2012
Author(s)
Azami NAM, Moi ML, Takasaki T, Salleh SA, Neoh HM, Othman Z, Shah SA, Kurane I, Jamal R.
Organizer
13^<th> Asia-Pacific Congress on Clinical Microbiology and Infection.
Place of Presentation
Beijing, China
Year and Date
20121000
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[Presentation] Application of the dengue non-structural protein 1 (NS1) ELISA for the detection of dengue virus infection in travelers2012
Author(s)
Moi ML, Omatsu T, Tajima S, Lim CK, Saijo M, Kurane I, Takasaki T.
Organizer
9 ^<th> Asia Pacific Travel Health Conference in conjunction with the 5^<th> Regional Meeting of the International Society of Travel Medicine.
Place of Presentation
SingaporeMoi ML, Lim CK, Saijo M, Kurane I, Takasaki T
Year and Date
20120500
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[Presentation] デング熱診断サーベイランスのためのNS1抗原検出診断キット2012
Author(s)
Moi ML, Lim CK, Saijo M, Kurane I, Takasaki T.
Organizer
86^<th> Annual Meeting of the Japanese Association for Infectious Diseases
Place of Presentation
Nagasaki, Japan
Year and Date
20120400
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[Presentation] Pathogenesis of epidemic chikungunya virus in nonhuman primates2011
Author(s)
Lim CK, Ami Y, Fujii Y, Moi ML, Kitaura K, Kotaki A, Morikawa S, Saijo M, Suzuki R, Kurane I, Takasaki T
Organizer
International Congress of Virology
Place of Presentation
北海道
Year and Date
20110900
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