Tet2欠乏した宿主において,微生物信号が白血病前骨髄増殖を誘発する
Marlies Meisel1,2, Reinhard Hinterleitner1,2, Alain Pacis3,4
1Department of Medicine, University of Chicago, Chicago, IL, USA.
Nature
|May 18, 2018
まとめ
テトラメチルサイトシンダイオキシゲナーゼ2 (TET2) 変異は白血病を引き起こす可能性があります. 腸壁機能障害と微生物信号は,Tet2欠乏したマウスの白血病前骨髄増殖を誘発し,血液がんの新たな治療標的を示唆する.
科学分野:
- 血液学
- 免疫学
- 微生物学
背景:
- TET2 (テトメチルサイトシン酸化酵素2) の体内変異は,血液形成性悪性腫瘍を誘発する.
- TET2欠乏症は血液形成幹細胞の自己再生を増加させ,骨髄系に発展を誘導する.
- Tet2欠乏モデルにおける白血病前骨髄増殖 (PMP) は不完全であり,外的な要因が関与していることを示唆している.
研究 の 目的:
- Tet2欠乏したマウスのPMP発現における外部因子の役割を調査する.
- 腸のバリア機能,微生物信号,PMPを結びつけるメカニズムを解明する.
- TET2 変異の有病性腫瘍に対する潜在的な治療戦略を特定する.
主な方法:
- 腸内障壁の整合性の度合いが異なるTet2欠乏性マウスモデルを使用した.
- 細菌刺激と抗生物質を投与し,PMPの発達と逆転を評価した.
- インタールイキン-6の産生と細菌の転移を分析した.
主要な成果:
- 細菌の転移と小腸障害機能障害によるインタールキン-6の増加は,Tet2欠乏したマウスのPMPにとって重要なものです.
- PMPは,症状のないTet2欠乏症のマウスにおいて,腸壁の整合性を破壊するか,全身性細菌刺激によって誘発される.
- 抗生物質の治療はPMPを逆転させ,細菌のないTet2欠乏したマウスはPMPを発達させず,微生物信号の役割を強調した.
結論:
- Tet2欠乏したマウスのPMP発現には微生物依存性炎症が必要である.
- 腸壁の機能不全とそれに続く微生物の転移は,PMPの主要な要因です.
- これらの発見は,PMPの浸透率の変動のメカニズム的基礎を提供し,血液形成性悪性腫瘍の新たな治療法を示唆する.
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