アダリン遺伝子のミッセンセスの変異は,自己相性後退性筋縮症に関連しています
S L Roberds1, F Leturcq, V Allamand
1Howard Hughes Medical Institute, University of Iowa College of Medicine, Iowa City 52242.
Cell
|August 26, 1994
まとめ
重度の小児性自己相性後退性筋縮症 (SCARMD) はアダリン欠乏症と関連しています. 研究者はアダリン遺伝子を染色体17にマッピングし,一部の家族でSCARMDを引き起こす可能性がある変異を特定しました.
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.
- 神経筋疾患 神経筋疾患
背景:
- ディストロフィンに関連したグリコタンパク質であるアダリン (Adhalin) は,重度の小児性オートソーム性後退性筋縮症 (SCARMD) の患者の骨格筋に欠けています.
- 以前の研究では,SCARMDをいくつかの家族で13q染色体と関連付けましたが,他の家族では除外され,遺伝的異質性を示唆しました.
研究 の 目的:
- 人間のアダリンcDNAをクローンし,アダリン遺伝子をマッピングする.
- SCARMDにおけるアダリン遺伝子の役割を調査し,特に染色体13qと関連していないファミリーで調査する.
主な方法:
- ヒトアダリンcDNAクローニングと染色体解析による遺伝子マッピング.
- アダリン遺伝子内のマイクロサテライト分析により,疾患のフェノタイプとの共分離を評価する.
- 感染した個体におけるアダリン遺伝子内の変異スクリーニング.
主要な成果:
- アダリン遺伝子は,染色体17q12-q21.33にマッピングされ,13q-リンクされたSCARMD.への関与は除外されました.
- アダリン遺伝子のイントロン6内の特定のマイクロサテライト変異体が,大きなファミリーのSCARMDと完璧にコセグレートした.
- アダリン遺伝子内のミッセンスの変異が特定され,このファミリーのSCARMDにおける因果的な役割を示唆しました.
結論:
- アダリン遺伝子は,少なくとも1種類の自己相性後退性筋縮症に関与しています.
- アダリン遺伝子の遺伝分析は,染色体13qと関連していない家族におけるSCARMDの診断に不可欠です.
- この研究は,SCARMDの遺伝的理解を洗練し,新しい遺伝子関連性を特定します.
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