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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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遺伝的振動 遺伝的な振動 胚のパターン形成におけるドップラー効果

Daniele Soroldoni1, David J Jörg2, Luis G Morelli3

  • 1Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstr 108, 01307 Dresden, Germany. Medical Research Council (MRC)-National Institute for Medical Research, The Ridgeway, Mill Hill, London, NW7 1AA, UK. Department of Cell and Developmental Biology, University College London, Gower Street, London, WC1E 6BT, UK.

Science (New York, N.Y.)
|July 12, 2014
PubMed
まとめ

胚の分割のリズムは,遺伝的振動によってのみ制御されるわけではありません. 組織の縮小は第2の時間スケールとして作用し,ドップラー効果を通じてセグメンテーション速度に影響を与えます.

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科学分野:

  • 発達生物学 発達生物学とは
  • 遺伝学 遺伝学とは
  • バイオフィジックス 生物物理学

背景:

  • 胚の発達には,身体軸のセグメンテーションのための調整された時間的,空間的なヒントが含まれます.
  • 連続的に分割する動物におけるセグメンテーションのリズムは,伝統的に遺伝的振動時間スケールに起因する.

研究 の 目的:

  • 斑馬魚の胚におけるセグメンテーションの時間的期間を制御する要因を調査する.
  • 遺伝子振動の時間尺度だけでセグメンテーションリズムが説明できるかどうかを判断する.

主な方法:

  • ゼブラフィッシュの胚における遺伝子振動のリアルタイム測定.
  • 組織縮小率と振動プロファイルの変化の分析.

主要な成果:

  • 遺伝子の振動の時間スケールは,セグメンテーション期間を説明するのに不十分です.
  • 組織の縮小は,ドップラー効果によってセグメンテーション期に寄与する.
  • 組織全体の振動プロフィールの変化は,ドップラー効果を調節する.

結論:

  • セグメンテーションリズムは,出現する性質である.
  • 遺伝的振動時間スケール,振動プロファイルの変化,組織縮小の相互作用によって制御されます.