潜伏感染中にヘルペスシンプレックスウイルス1によって発現されるマイクロRNAは,ウイルスのmRNAを調節する
Jennifer Lin Umbach1, Martha F Kramer, Igor Jurak
1Department of Molecular Genetics and Microbiology and Center for Virology, Duke University Medical Center, Durham, North Carolina 27710, USA.
Nature
|July 4, 2008
まとめ
ヘルペス・シンプレックスウイルス1 (HSV-1) の潜伏は,潜伏関連トランスクリプト (LAT) および他のウイルストランスクリプトから派生したマイクロRNA (miRNA) を含む. これらのmiRNAは,重要なウイルスタンパク質を調節し,HSV-1が生涯にわたる感染を確立する方法を説明する可能性があります.
科学分野:
- ウイルス学 ウイルス学 ウイルス学
- 分子生物学は分子生物学である.
- 遺伝子規制 遺伝子規制
背景:
- ヘルペスウイルスは生涯にわたる潜伏感染を確立しますが,そのメカニズムは十分に理解されていません.
- ヘルペス・シンプレックスウイルス1 (HSV-1) の潜伏はニューロンで発生し,潜伏関連トランスクリプト (LAT) が重要なウイルス産物である.
- レイテンシー維持と再活性化におけるLATの役割は不明である.
研究 の 目的:
- HSV-1の遅延における遅延関連トランスクリプト (LAT) の機能を調査する.
- 潜伏期間にHSV-1によって暗号化されたマイクロRNA (miRNA) を識別し,特徴づけること.
- これらのウイルスのmiRNAがウイルスの遺伝子発現を調節し,遅延に寄与する方法を理解する.
主な方法:
- HSV-1に感染した細胞と潜在的に感染したトライジェミナル・ギャングリアの分析.
- ウイルスのマイクロRNA (miRNA) およびその前駆体の識別と特徴付け.
- ウイルスの遺伝子発現のmiRNA媒介の転写後の調節 (ICP0およびICP4) の評価.
主要な成果:
- HSV-1の潜伏関連トランスクリプト (LAT) は,4つの異なるマイクロRNA (miRNA) の前駆体として機能します.
- 1つのmiRNA,miR-H2-3pは,ICP0タンパク質を標的にし,その発現を転写後に減少させます.
- 別々のトランスクリプトから派生した5番目のmiRNA,miR-H6は,ICP4mRNAを標的とし,その発現を抑制する.
結論:
- HSV-1は,LATを含む,遅延期間に複数のプライマリミRNA前駆体を発現する.
- miR-H2-3pやmiR-H6のようなこれらのウイルスのmiRNAは,転写後に重要なウイルスタンパク質 (ICP0,ICP4) を調節する.
- このmiRNA媒介の調節は,HSV-1の潜伏状態の確立と維持に寄与する可能性がある.
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