転写ネットワークにおける相関なき因果関係の存在
bioRxiv : the preprint server for biology
|February 23, 2026
まとめ
遺伝子発現ネットワークにおける因果関係は、相関関係なしに存在しうる。新しい非線形因果関係検定は、酵母とマウスにおけるこれらの隠れたリンクを明らかにし、従来の相関ベースの分析に挑戦する。
科学分野:
- システム生物学
- 遺伝子調節ネットワーク解析
- 計算生物学
背景:
- 生物システムにおける因果関係の証拠として、相関が誤ってしばしば使用される。
- 転写ネットワークは、非線形および時間的に協調した遺伝子発現パターンを含む複雑なダイナミクスを示す。
- 既存の方法では、線形相関の欠如によって隠された因果関係を見逃す可能性がある。
研究 の 目的:
- 相関に依存しない因果関係の存在を転写ネットワークで調査すること。
- 隠れた因果関係を明らかにするために、非線形因果関係検定を開発し適用すること。
- 酵母とマウスのモデルで発見を検証すること。
主な方法:
- 酵母とマウスの遺伝子発現データの分析。
- 状態依存的および時間的ダイナミクスを考慮した新しい非線形因果関係検定の適用。
- 酵母における検出された非相関因果関係の実験的検証。
主要な成果:
- 酵母とマウスの遺伝子のかなりの割合(65-77%)が、状態依存的かつ時間的に協調した発現を示す。非線形因果関係検定は、相関ベースの方法では見えない強い因果関係を特定した。酵母における転写調節因子WHI5およびYHP1の非相関因果リンクが検出され、実験的に検証された(71-78%の精度)。
結論:
- 転写ネットワークにおいて、相関の欠如は因果関係の欠如を意味しない。
- 非線形因果関係検定は、複雑な調節相互作用を明らかにするために重要である。
- このアプローチは、重要な細胞チェックポイントにおける遺伝子調節の理解を深める。
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