2009 Fiscal Year Final Research Report
Experimental rodent model of cerebral malaria in semi-immune and recrudescent animals
| Project/Area Number |
20790325
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Parasitology (including Sanitary zoology)
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| Research Institution | Nagasaki University |
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Principal Investigator |
HUY-TIEN Nguyen Nagasaki University, 熱帯医学研究所, 助教 (20457526)
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| Project Period (FY) |
2008 – 2009
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| Keywords | マラリア / 脳マラリア / 準免疫 / 再燃 / マウス |
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| Research Abstract |
Cerebral malaria (CM) in semi-immune and recrudescent individuals is rare but still a real issue in endemic areas. In endemic areas, adults are less vulnerable to CM than children because of acquired partial immunity, and the question that how many infections are required to get acquired immunity to protect the host against CM is still unsolved. Here, we developed a CM model in semi-immune and recrudescent animals for better understanding of cerebral malaria and provide a tool for treatment of the disease. To assess the CM occurring in semi-immune mice, 2 trains of mice (B6, Balb/c) were taken through several cycles (0-2 cycles) of infection and treatment, then the mice was challenged with with 10^4P. berghei ANKA again without treatment. This study helps to understand the follow: (1) CM can occur in non-immune and semi-immune B6 mice but not in recrudescent mice. (2) Pre-infection did not affect the CM susceptibility of resistant Balb/c mice. (3) Two infections are required for protection of CM in susceptible B6 mice. (4) The pathogenesis of CM is not different between naive and 1 cycle infection B6 mice. (5) CD8 T-cells, blood-brain-barrier regulators angiopoietin-1 (ANG-1) and angiopoietin-2 (ANG-2), and released heme contributed in the pathogenesis of CM. (6) Antioxidants and heme chelators could be used as complement treatment for CM.
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[Journal Article] Neutralization of Toxic Heme by Porphyromonas gingivalis Hemoglobin Receptor.2010
Author(s)
Nhien NT, Huy NT, Naito M, Oida T, Uyen DT, Huang M, Kikuchi M, Harada S, Nakayama K, Hirayama K, Kamei K
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Journal Title
J Biochem 147(3)
Pages: 317-25
Peer Reviewed
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[Presentation] Histopathologic studies in different strains of semi-immune mice infected with P. berghei ANKA after chronic exposure2009
Author(s)
Gideon kofi helegbe, Tetsuo Yanagi, Masachika Senba, Nguyen Tien Huy, Mohammed Nasir Shuaibu, Akiko Yamazaki, Mihoko Kikuchi, Michio Yasunami, Kenji Hirayama
Organizer
Conference presentation (poster) at the 58th ASTMH (America Society of Tropical Medicine and Hygiene)
Place of Presentation
Marriot Wardman Park, Washington, DC, USA
Year and Date
20091118-20091122
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[Presentation] Doan Thi Ngoc Diep and Kenji Hirayama2009
Author(s)
Nguyen Tien Huy, Nguyen Thanh Hong Thao, Truong Huu Khanh, Nguyen Anh Tuan2
Organizer
Diagnostic rule to identify bacterial from viral meningitis. Conference presentation (poster) at the 50th Annual Meeting of the Japanese Society of Tropical Medicine
Place of Presentation
Okinawa, Japan
Year and Date
20091022-20091023
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[Presentation] Role of circulating plasma DNA in severe dengue disease2009
Author(s)
Tran Thi Ngoc Ha, Nguyen Tien Huy, Vu Thi Que Huong, Tran Thi Thuy, Mihoko Kikuchi, Michio Yasunami, Kenji Hirayama
Organizer
Conference presentation (poster) at the 50th Annual Meeting of the Japanese Society of Tropical Medicine
Place of Presentation
Okinawa, Japan
Year and Date
20091022-20091023
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