ミトック遺伝子の変換によって引き起こされるエピダーモリシスブルロサにおけるリバータントモザイシズム
M F Jonkman1, H Scheffer, R Stulp
1Department of Dermatology, University Hospital Groningen, The Netherlands.
Cell
|February 21, 1997
まとめ
逆転変異であるミトーシス遺伝子変換は,初めてヒトで実証されました. このプロセスは,一般化された縮性良性表皮溶解ブルロサにおけるリバータントモザイシズムを説明し,自然な遺伝子療法アプローチを提供している.
科学分野:
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
- 皮膚科 皮膚科について
背景:
- 汎化性無毒良性表皮溶解ブローザ (GABEB) は,自己相性後退性ゲノダーマトーシスである.
- 人間のゲノダーマトーシスにおけるリバータント・モザイシズムの遺伝的基礎は,以前は確立されていなかった.
- COL17A1遺伝子の変異は,特定の形態の表皮溶解 (epidermolysis bullosa) に関わっている.
研究 の 目的:
- GABEBの患者におけるリバータントモザイカリズムの基礎となる分子メカニズムを調査する.
- ヒト細胞の逆変異の原因としてミトーシス遺伝子変換を実証する.
- 観察されたモザイシズムに起因する特定の遺伝的変異を特定する.
主な方法:
- 患者のケラチノサイトから得られたDNAの分析. 影響を受けたおよび影響を受けていない皮膚のパッチから得られた.
- COL17A1遺伝子の変異を特定するためのゲノタイプ化.
- 遺伝子の変換の範囲を定義するヘテロジゴシティ分析の喪失.
主要な成果:
- GABEB患者のリバータント・モザイシズムは,1つのCOL17A1アレルのミト性遺伝子変換によって引き起こされた.
- 母親のCOL17A1アレル (1706delA) が逆転し,影響を受けていない皮膚ケラチノ細胞のヘテロジゴシティの喪失を示した.
- 父のCOL17A1変異 (R1226X) は,分析されたすべての細胞サンプルに存在し続けました.
結論:
- ミトスの遺伝子変換は,ヒトにおける逆変異メカニズムとして作用する.
- GABEBにおけるリバータント・モザイシズムは,COL17A1遺伝子変換の結果である.
- この現象は,ゲノダーマトーシスのための自然な遺伝子治療の1つの形態を表しています.
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