固有のクレチニズム:甲状腺の自己免疫性に対する潜在的な役割
S C Boyages1, J P Halpern, G F Maberly
1Department of Medicine, Westmead Hospital, Sydney, Australia.
Lancet (London, England)
|September 2, 1989
まとめ
ミクソエデマトス性エンドミッククレチニズムにおける甲状腺縮は,甲状腺の成長を阻害する特定のIgG抗体と関連しています. この発見は,この状態の多様な臨床表現を説明します.
科学分野:
- エンドクリノロジー エンドクリノロジー
- 免疫学 免疫学とは
- 遺伝学 遺伝学とは
背景:
- 甲状腺縮はミクソエデマトスクレチニズムの重要な特徴ですが,その原因は不明です.
- エンドミッククレチニズムは,神経学的および甲状腺の異常を含む変化する臨床的表れを示します.
研究 の 目的:
- ミキソエデマトス性固有のクレチニズムにおける甲状腺縮の病原性における免疫グロブリンG (IgG) の役割を調査する.
- 流行性クレチニズムにおける多様な臨床結果に寄与する潜在的な病原性要因を特定する.
主な方法:
- ミクソエデマトス性エンデミッククレチニズム患者からの浄化されたIgG分子は,シトキミカルバイオアッセイを用いてギニアピッグの甲状腺セグメントにおけるチロトロピン誘発DNA合成に対する効果を試験した.
- ユーチロイド内在性クレチニズム患者と正常な被験者の血清IgGがコントロールとして使用されました.
- 甲状腺縮を評価するために超音波を用いた.
主要な成果:
- ミクソエデマトス性エンドミッククレチニズム患者からのIgGは,豚の甲状腺セグメントにおけるチロトロピン誘発のDNA合成を著しく抑制しました.
- 甲状腺固有のクレチニズム患者および正常な被験者からのIgGは,甲状腺の成長に対する抑制効果を示さなかった.
- 甲状腺の成長を阻害する免疫グロブリンと甲状腺縮の存在との間の正の相関は,ミクソエデマトスな被験者の間で観察されました.
結論:
- 甲状腺の成長を阻害する免疫グロブリンが,ミクソエデマトス性エンドミッククレチニズム患者からのIgG分子のIgG分子は,甲状腺縮の病原性役割を果たします.
- これらの発見は,固有のクレチニズムの変数的な臨床表現の分子基礎を提供し,特定の自己抗体を甲状腺病理学と関連付けています.
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