胎盤マラリアにおけるPfEMP1に結合する非免疫IgGの役割
K Flick1, C Scholander, Q Chen
1Microbiology and Tumor Biology Center (MTC), Karolinska Institutet and Swedish Institute for Infectious Disease Control, Box 280, S-171 77 Stockholm, Sweden.
Science (New York, N.Y.)
|September 15, 2001
まとめ
妊娠中の女性のプラズモディウムファルシパラム感染症は,感染した赤血球が胎盤に蓄積する原因になります. これらの感染した細胞は,免疫グロブリンG (IgG) に結合し,潜在的に胎盤受容体に橋渡しをします.
科学分野:
- 免疫学 免疫学とは
- 感染症 感染症は感染症です.
- 産科は産婦人科です.
背景:
- 妊娠中のPlasmodium falciparum感染は,感染した赤血球 (IE) の胎盤の蓄積につながります.
- 胎盤を感染させるP. falciparum菌株からのIEは,免疫グロブリンG (IgG) に結合することを示す.
研究 の 目的:
- 感染した赤血球が胎盤に付着するメカニズムを調査する.
- プラズモジアム・ファルシパラムの胎盤連鎖における免疫グロブリンG (IgG) の役割を調査する.
主な方法:
- IgG結合のために選択されたP. falciparumのクローン株を使用しました.
- 感染した赤血球が胎盤のシンチチオトロフォブラストに付着することを観察した.
- IgG結合タンパク質,グリコサミノグリカン,および酵素的消化を用いた粘着の抑制を試験した.
主要な成果:
- IgG結合のためにクローン化されたP. falciparum菌株は,胎盤のシンチチオトロフォブラストに大規模な結合を示した.
- 粘着は,IgG結合タンパク質によって有意に抑制された.
- 粘着は,グリコサミノグリカンや特定の炭水化物の酵素による消化によって影響されませんでした.
結論:
- 感染した赤血球へのIgG結合は,P. falciparumの妊娠感染中に胎盤収縮の重要な要因です.
- PfEMP1に結合する正常な非免疫IgGは,胎盤新生児Fc受容体への橋渡しとして作用し,IE結合を媒介する.
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