タイプIIIインターフェロンは,腸内皮質細胞のピロプトーシスを誘発し,粘膜の修復を阻害する
Kautilya K Jena1, Julien Mambu2, Daniel Boehmer3
1Division of Immunology, Harvard Medical School and Boston Children's Hospital, Boston, MA 02115, USA.
Cell
|November 5, 2024
まとめ
タイプIやIIのインターフェロンは,Z-DNA結合タンパク質1 (ZBP1) を上調することで腸の修復を阻害し,熱死を引き起こし,治癒を遅らせます. この経路は炎症性腸疾患 (IBD) に関わっている.
科学分野:
- 免疫学
- 胃腸内科
- 細胞生物学
背景:
- 組織損傷と炎症は 修復プロセスと密接に関連しています
- 組織損傷のメカニズムはよく研究されていますが,炎症が修復に与える影響はあまり理解されていません.
- インターフェロンは,炎症と免疫における様々な役割を持つ重要な免疫シグナル分子です.
研究 の 目的:
- 損傷後の腸組織修復における様々なインターフェロンの役割を調査する.
- インターフェロンが表皮再生に影響を与える分子メカニズムを解明する.
- ヒトの炎症性腸疾患 (IBD) で特定された経路の関連性を決定する.
主な方法:
- 損傷モデルにおける腸上皮細胞再生に対するI型,II型,III型インターフェロンの影響を調査した.
- Z-DNA結合タンパク質1 (ZBP1),カスパース-8,ガスダーミンC (GSDMC) を含む主要なタンパク質と関わる経路を特定するために分子技術を使用した.
- インターフェロン媒介経路の活性を評価するために,IBD患者のサンプルを分析した.
主要な成果:
- タイプIまたはIIのインターフェロンは,上皮細胞再生を遅らせることが判明しました.
- この遅延は,損傷後のZ核酸を感知するZBP1のアップレギュレーションによって引き起こされた.
- ZBP1の活性化により,カスパース8の活性化,GSDMCの分裂,熱死,腸の修復が遅れた.
- III型インターフェロン/ ZBP1/ カスパース-8/ GSDMCのシグナリング軸はIBDの患者で観察されました.
結論:
- 腸内組織の修復を遅らせることに重要な役割を果たします.
- ZBP1,カスパース8,GSDMCが関与する特定された経路は,III型インターフェロンが腸内治癒を阻害する重要なメカニズムです.
- これらの発見は,IBDや放射線治療による合併症などの状態を理解し,治療する上で重要な意味を持っています.
さらに関連する動画
10:00High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
Published on: March 24, 2015
13.3K
06:12Author Spotlight: THP-1 Macrophage Response to LPS/ATP — Unveiling the Pyroptosis, Apoptosis, and Necroptosis Spectrum
Published on: May 3, 2024
1.7K
関連する概念動画
Gastritis-II: Pathophysiology
261
Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
261
Immune Response Against Viral Pathogens
753
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
753
T Cell Types and Functions
954
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
954
Cells of the Innate Immune Response
1.6K
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
1.6K
