ホックス遺伝子は,チューリング型メカニズムの波長を制御することによって,指のパターンを調節する
Rushikesh Sheth1, Luciano Marcon, M Félix Bastida
1Facultad de Medicina, Instituto de Biomedicina y Biotecnología de Cantabria, Consejo Superior de Investigaciones Científicas-Sociedad para el Desarrollo Regional de Cantabria-Universidad de Cantabria, 39011 Santander, Spain.
まとめ
ネズミの遺伝学では,遠隔ホックス遺伝子の用量は数字の距離に影響し,足の発達のためのチューリング型反応-拡散モデルをサポートすることを明らかにしています. このメカニズムは,ペンタダクティル (五桁) 状態の進化を説明するかもしれない.
科学分野:
- 発達生物学 発達生物学とは
- 遺伝学 遺伝学とは
- コンピュータ生物学 コンピュータ生物学
背景:
- ストライプのような自然に繰り返されるパターンは,しばしば反応拡散システム (チューリングモデル) から生じる.
- 脊椎動物の肢体における桁のパターンは,桁/非桁の形成の繰り返しパターンを表しています.
研究 の 目的:
- マウスの肢体における指のパターンの基礎にある遺伝的メカニズムを調査する.
- 肢体の発達に反応拡散原理が適用されるかどうかを判断する.
主な方法:
- Gli3-null背景におけるディスタルホックス遺伝子 (Hoxa13,Hoxd11-Hoxd13) を減少させる効果を分析するためにマウスの遺伝学を利用した.
- 遺伝子データに基づく数字のパターンをシミュレートするために計算モデリングを使用しました.
- マウスの指のパターンを魚の内骨格のパターンと比較した.
主要な成果:
- ディスタルホックスの遺伝子の漸進的な減少は,より薄く,密集した指で,ますます重度のポリダクティリア (余分な指) に繋がりました.
- コンピュータモデリングは,ディスタルホックス遺伝子用量が桁間隔 (期間/波長) を調節するチューリング型メカニズムをサポートしました.
- マウスの指のパターンと魚のの骨格パターンの間の現象的類似性が観察されました.
結論:
- この研究は,桁のパターニングにおけるチューリング型反応拡散機構の証拠を提供する.
- ディスタルホックス遺伝子は,数字パターンの周期性の重要な調節体として作用する.
- ペンタダクティル (五桁) の四肢構造は,祖先のチューリング型メカニズムから進化したのかもしれない.
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