赤色視界におけるアクセサリークロモフォール
T Isayama1, D Alexeev, C L Makino
1Department of Ophthalmology, Massachusetts Eye & Ear Infirmary, Boston, Massachusetts 02114, USA.
Nature
|October 13, 2006
まとめ
ある魚はクロロフィルを用いて,深海で赤い光が見える. この研究では,サラマンダの眼細胞は,クロロフィルの誘導体を使用して赤色の光による視力を向上させることが示され,一般的な脊椎動物の光受容機構を示唆しています.
科学分野:
- 視覚用ピグメント 視覚用ピグメント
- フォトレセプション
- クロロフィルの誘導体
背景:
- 赤色に敏感な視覚色素を欠いている深海魚は,クロロフィール系を深赤色の光を感知するために利用します.
- この適応は,限られた光スペクトルを持つ環境でも視力を可能にします.
研究 の 目的:
- 深海の魚以外の脊椎動物の光受容体細胞が,外因的なクロロフィール派生体を蓄積できるかどうかを調査する.
- このような蓄積がこれらの細胞の赤色光に対する感受性を高めるかどうかを判断する.
主な方法:
- サラマンダの目から生きた棒細胞を抽出する.
- これらの細胞を,外因的なクロロフィール派生物である塩素e6.6.でインキュベーションする.
- 治療された棒細胞の赤光感受性の評価.
主要な成果:
- サラマンダの棒細胞は,外因的なクロロフィール派生物であるクロリンe6.を成功裏に蓄積した.
- 塩素フィールで処理された細胞は,赤色光に対する感受性が高まり,緑色光に対する感受性と同等であった.
- クロロフィルの誘導体は漂白不能であることが判明し,持続的な光感受性を示した.
結論:
- 脊椎動物の光受容体細胞は,外因的なクロロフィール誘導体で拡張され,スペクトル感度が向上します.
- 漂白不能のクロロフィール誘導体を使用した視力強化は,脊椎動物の光感受における広範な現象である可能性があります.
- この発見は,異なる脊椎動物種の視力を理解し,潜在的に改善する可能性を広げています.
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