フォークヘッド・ドメインの遺伝子が突然変異し,重度のスピーチ・ランゲージ障害を引き起こします
C S Lai1, S E Fisher, J A Hurst
1Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, UK.
Nature
|October 5, 2001
まとめ
FOXP2遺伝子の希少な遺伝子変異が発達のスピーチおよび言語障害を引き起こす. この発見は,スピーチと言語発達の複雑な遺伝的基礎に関与する重要な遺伝子を特定しています.
科学分野:
- 遺伝学 遺伝学とは
- 神経科学は神経科学である.
- 発達生物学 発達生物学について
背景:
- 発達のスピーチおよび言語障害は,通常の知性と機会にもかかわらず,言語習得に影響します.
- 遺伝的要因は関与しているが,遺伝パターンは複雑で,原因遺伝子は難解である.
- 独特の3世代ファミリー (KE) は,重度のスピーチ・ランゲージ障害をオートソーマル・ドミナント・モノジェニック特質として表している.
研究 の 目的:
- KEファミリーと無縁の個体 (CS) のスピーチおよび言語障害に起因する特定の遺伝子を特定する.
- 発話と言語の発達におけるFOXP2遺伝子の役割を調査する.
主な方法:
- 遺伝的リンク分析により,責任ある場所 (SPCH1) を染色体7q31.1にマッピングします.
- SPCH1間隔に影響する個々のCSの染色体転位の分析.
- 感染した個人および対照群におけるFOXP2遺伝子の識別と配列決定.
主要な成果:
- 転写因子をコードするFOXP2遺伝子は,個々のCS.の転位ブレイクポイントによって破壊されていることが判明しました.
- FOXP2フォークヘッドドメインのインヴァリアントアミノ酸を変更する点変異は,KEファミリーの影響を受けたメンバーで特定されました.
- これらの遺伝的変異は,FOXP2が話し方と言語における役割を有する強力な証拠を提供します.
結論:
- FOXP2遺伝子は,人間のスピーチと言語の基礎となる発達プロセスに直接関与しています.
- FOXP2の変異は,重度の発達のスピーチおよび言語障害につながる可能性があります.
- この研究は,FOXP2を,スピーチと言語の重要な遺伝子として特定しています.
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