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Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

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Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
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Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
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High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
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スナップショット:インターフェロン信号

Kwan T Chow1, Michael Gale1

  • 1Department of Immunology, Center for Innate Immunity and Immune Disease, University of Washington School of Medicine, 750 Republican Street, Seattle, WA 98109, USA.

Cell
|December 22, 2015
PubMed
まとめ
この要約は機械生成です。

インターフェロン (IFN) は,抗菌,抗腫瘍,免疫調節作用を持つ重要なサイトカインです. このレビューでは,異なるIFNタイプが特定の受容体を通してどのように遺伝子発現を調節し,免疫に影響を与えるかを詳細に説明します.

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科学分野:

  • 免疫学
  • 分子生物学
  • 細胞生物学

背景:

  • インターフェロン (IFN) は,病原体と腫瘍に対する宿主防御に関与する重要なサイトカインです.
  • IFNには主に3種類 (タイプI,II,III) があり,受容体結合と遺伝子配列によって区別される.
  • IFNは刺激を受けて細胞によって分泌され,重要なシグナリングカスケードを開始します.

研究 の 目的:

  • 異なるインターフェロンのシグナル伝達経路を見直す
  • 細胞反応を媒介するインターフェロン受容体の役割を明らかにする.
  • 免疫調節のための遺伝子発現を 制御する方法について説明します

主な方法:

  • インターフェロンの信号伝達経路に関する文献レビュー
  • インターフェロン受容体の相互作用の分析
  • インターフェロン刺激後の遺伝子発現プロフィールの検査

主要な成果:

  • 異なるタイプのインターフェロンは 異なる受容体に作用して 独特の下流信号を発信します
  • IFNのシグナル伝達経路は,多数の遺伝子の発現を調節するために収束します.
  • これらの調節された遺伝子は 生まれつきの免疫反応と 適応性免疫反応の両方を調節するのに 極めて重要です

結論:

  • インターフェロンのシグナル伝達は,特定の受容体相互作用を含む複雑なプロセスです.
  • IFN媒介の遺伝子調節は,効果的な免疫反応に不可欠です.
  • これらの経路を理解することで 感染症や癌に対する 治療戦略の洞察が得られます