Difは,ドロソフィラの免疫反応を媒介する背面関連遺伝子である
1Department of Biology, University of California, San Diego, La Jolla 92093-0322.
Cell
|November 19, 1993
まとめ
新しい遺伝子である背面関連免疫因子 (Dif) は,感染時に核に転移することによって,ドロソフィラ幼虫の免疫反応を調節する. この発見は,昆虫と哺乳類の免疫の共通の進化的起源を示唆しています.
科学分野:
- 発達生物学 発達生物学とは
- 免疫学 免疫学とは
- 遺伝学 遺伝学とは
背景:
- ドロソフィラ胚の背中中枢 (DV) 軸に沿った遺伝子発現の調節と哺乳類のリンパ球受限発現は類似点がある.
- 両プロセスは,核輸送によって制御される rel ドメイン (dorsal と NF-kappa B) の規制要因に依存しています.
- これらのプロセスの間の潜在的なリンクが調査されました.
研究 の 目的:
- ドロソフィラの新しいRelを含む遺伝子を特定し,特徴づけ,背面関連免疫因子 (Dif) と命名.
- ドロソフィラの発達と免疫における Dif の役割を調査する.
- 昆虫と哺乳類の免疫システムとの進化的関係を調査する.
主な方法:
- 背面遺伝子の相対的なDifの位置を特定するための遺伝的マッピング.
- Difの局所化研究は,正常な状態と感染した状態で,幼虫の脂肪体細胞で実施された.
- バクテリアの感染や傷害による Dif の核転移の分析.
- 免疫遺伝子プロモーターのカッパB型配列モチーフへのDifの結合の調査.
主要な成果:
- 新しいRelを含む遺伝子であるDifは,Drosophila.で特定されました.
- DifはDVパターンの形成に関与しないようだが,幼虫の免疫反応を媒介する.
- Difは,バクテリアの感染や損傷により,幼虫の脂肪体細胞の細胞質から核に転移する.
- Difは,免疫遺伝子のプロモーター領域のkappa B型配列に結合する.
結論:
- Difは,ドロソフィラ幼虫の先天的な免疫反応において重要な役割を果たします.
- 感染時のDifの核輸送機構は,哺乳類の免疫調節と類似している.
- これらの発見は,昆虫と哺乳類の免疫の共通の進化的起源を示唆しています.
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