炎症性ホルモン媒介性ディスバイオシスはNAFLDと肥満の進行を調節する
Jorge Henao-Mejia1, Eran Elinav, Chengcheng Jin
1Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut 06520, USA.
Nature
|February 3, 2012
まとめ
欠陥のあるNLRP3およびNLRP6炎症ゾームは,腸内微生物群を変化させ,肝炎や代謝症候群を増加させ,非アルコール性脂肪肝疾患 (NAFLD) の進行を悪化させる. これはNAFLDの病原性における腸内微生物の重要な役割を強調しています.
科学分野:
- 免疫学 免疫学とは
- 胃腸内科 胃腸内科
- 微生物学 微生物学とは
背景:
- 非アルコール性脂肪肝疾患 (NAFLD) は,しばしば代謝症候群と関連付けられている,世界的な健康上の懸念が高まっています.
- NAFLDから炎症と潜在的肝硬変によって特徴づけられる非アルコール性ステアト肝炎 (NASH) への進行は完全に理解されていません.
- 代謝および炎症性疾患における腸内微生物群の役割は,ますます認識されています.
研究 の 目的:
- NAFLDとメタボリックシンドロームの進行におけるNLRP6とNLRP3炎症体の役割を調査する.
- インフラマソームが腸内微生物群の構成と宿主の代謝に影響を与えるメカニズムを解明する.
- 肝炎炎症とステアトーシスに対する炎症体欠乏の影響を決定する.
主な方法:
- NAFLDとメタボリックシンドロームを研究するために,さまざまなマウスモデルを使用しました.
- インフラマソーム欠乏が腸内微生物群の構成と機能に与える影響を評価した.
- ポータル循環に微生物製品 (TLR4およびTLR9アゴニスト) の流入を分析した.
- TNF-α.のような主要な炎症媒介体の肝臓発現を測定した.
主要な成果:
- NLRP6とNLRP3の炎症体とIL-18は,NAFLD/NASHの進行と代謝症候群を否定的に制御する.
- インフラマソームの欠乏は,腸内微生物群の変化につながり,肝硬化症と炎症を悪化させます.
- 炎症体欠乏マウスにおけるTLR4およびTLR9アゴニストのポータル流入の増加は,肝臓のTNF-α発現を高め,NASHを誘発する.
- 同居での実験では,炎症体欠乏が肥満や肝臓脂肪酸症を悪化させることが示されました.
結論:
- 欠陥のあるNLRP3およびNLRP6炎症体センシングは,腸内微生物群と宿主の相互作用を変化させ,NAFLD/NASHの進行を促進します.
- これらの発見は,代謝症候群および関連する肝疾患の病原性における腸内微生物群の重要な役割を強調しています.
- この研究は,全身的自己炎症経路と腸内微生物群経由による代謝障害との潜在的な関連を強調しています.
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