SUMOylation-defectiveのMITF生殖線変異は,メラノーマと腎臓がんの発生を誘発する
Corine Bertolotto1, Fabienne Lesueur, Sandy Giuliano
11] INSERM, U895 (équipe 1), Equipe labélisée Ligue Contre le Cancer, C3M, 06204 Nice, France [2] Université of Nice Sophia-Antipolis, UFR Médecine, 06204 Nice, France [3] Centre Hospitalier Universitaire de Nice, Service de Dermatologie, 06204 Nice, France [4].
Nature
|October 21, 2011
まとめ
マイクロフタルミア関連転写因子 (MITF) 遺伝子であるMi-E318Kの遺伝子変異は,メラノーマおよび腎臓細胞癌 (RCC) の発症リスクを大幅に増加させます. この発見は,この2つの癌に対する共通の遺伝的傾向を示唆しています.
科学分野:
- 遺伝学 遺伝学とは
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
背景:
- メラノーマと腎臓細胞癌 (RCC) を関連付ける一般的な環境的または現象的要因はありません.
- メラノーマの既知の危険因子には,日光照射と色素化が含まれているが,RCCのリスクには喫煙と肥満が含まれている.
- 患者のメラノーマとRCCの同時発生により,遺伝的傾向が示唆されています.
研究 の 目的:
- ミクロフタルミア関連転写因子 (MITF) がメラノーマとRCCの同時発生の遺伝的傾向における役割を調査する.
- MITF内の特定の遺伝子変異を特定し,がんのリスクの増加と関連付けます.
主な方法:
- MITFの生殖系ミセンス置換を特定するための遺伝子型分析.
- MITFの変種が転写とタンパク質の相互作用に与える影響を評価するための機能的測定法.
- 遺伝子発現プロファイリングと細胞ベースのアッセイを使用して,腫瘍発生の可能性を評価します.
主要な成果:
- MITF (Mi-E318K) のゲルムラインミッセンス置換は,メラノーマ,RCC,または両方の患者でより高い頻度で発見されました.
- Mi-E318Kの持ち主は,これらのがんのリスクが5倍に増加しました.
- この変異は,MITF SUMOylationを阻害し,HIF1AプロモーターへのMITF結合を強化し,その転写活性を増加させた.
- Mi-E318Kは細胞の成長,増殖,炎症,クローン生成性,移住,侵入を促した.
結論:
- MITF Mi-E318Kの変種は,メラノーマとRCCの有意な遺伝的予備性を有しています.
- この変異は,転写とSUMOylationにおけるMITFの役割に影響を与え,腫瘍発生に寄与します.
- 発見は,SUMOylation,トランスクリプション,および癌の発症の間の分子関連についての洞察を提供します.
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