血小板は,赤血球内マラリア寄生虫を殺し,感染の生存を媒介する
Brendan J McMorran1, Vikki M Marshall, Carolyn de Graaf
1Menzies Research Institute, University of Tasmania, Private Bag 23, Hobart, Tasmania 7000, Australia. brendan.mcmorran@utas.edu.au
まとめ
血小板は赤血球内のマラリアの寄生虫を殺し,早期感染時に保護を提供します. 血小板を抑制すると,致命的なマラリアに対する感受性が高くなり,脳マラリア以外の新たな保護的役割が明らかになる.
科学分野:
- 免疫学 免疫学とは
- 感染症 感染症は感染症です.
- 血液学 ヘマトロジ
背景:
- 血小板は,感染した赤血球の封じ込めを促進することによって,マラリアの病原性,特に脳マラリアに関与しています.
- 血小板はまた,微生物の病原体に対する生まれつきの免疫において知られている役割を果たしています.
研究 の 目的:
- プラズモディアム・ファルシパラム感染症との闘いにおける血小板の直接的な役割を調査する.
- 血小板が,脳マラリアにおける既知の役割を超えて,マラリアに対する保護機能を示すかどうかを決定する.
主な方法:
- 浄化されたヒト血小板は,Plasmodium falciparumに感染した赤血球を in vitro で治療するために使用されました.
- 血小板機能は,アスピリンやその他の阻害剤を使用して抑制されました.
- 赤血球性プラズモディウム・チャバウディ感染症のマウスモデルは,血小板欠乏症のマウスとアスピリンを投与したマウスを用いて研究されました.
主要な成果:
- 人間の血小板は,プラズモディアム・ファルシパラムの寄生虫を直接殺すことを in vitro で実証しました.
- 血小板機能の抑制は,寄生虫を殺す効果を廃止しました.
- 血小板欠乏症とアスピリンを投与されたマウスは,致命的なマラリアに対する感受性の増加を示した.
- 人間の血小板とマウスの血小板は,感染した赤血球と結合し,細胞内寄生虫を殺すことが観察されました.
結論:
- 血小板は,感染の初期の赤血球性段階で,マラリアの寄生虫に対する直接的な保護的役割を果たします.
- この保護機能は,脳マラリアの病原性における以前に理解された役割とは異なる.
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