関連する実験動画
Updated: Aug 11, 2026

13:47
Development of Cell-type specific anti-HIV gp120 aptamers for siRNA delivery
Published on: June 23, 2011
HIV感染と細胞病変性を抑制する合成CD4ペプチド誘導体
J D Lifson1, K M Hwang, P L Nara
1Division of Cellular Immunology, Genelabs Incorporated, Redwood City, CA 94063.
まとめ
合成CD4ペプチド,特にS-ベンジル-CD4 ((83-94) のような誘導された断片は,ヒト免疫不全ウイルス (HIV) 感染と細胞融合をブロックする強力な能力を示しています. これらの改変ペプチドは,抗ウイルス治療のための有望な戦略を提供します.
科学分野:
- ウイルス学 ウイルス学 ウイルス学
- 免疫学 免疫学とは
- 薬用化学 薬用化学について
背景:
- CD4分子は,宿主細胞のヒト免疫不全ウイルス (HIV) の主要な受容体です.
- HIV感染と細胞間融合は,ウイルス病原性における重要なステップです.
研究 の 目的:
- HIVに対する合成CD4ペプチドセグメントの抗ウイルス活性を調べる.
- HIV感染と細胞融合を阻害する特定のペプチド配列と修正を特定する.
主な方法:
- CD4 ((76-94) を含むCD4ペプチドセグメントとその誘導体の合成.
- ペプチドの浄化と活性評価のための高性能液体染色法 (HPLC).
- HIV誘発細胞融合およびインビトロ感染モデルに対するペプチド活性検査.
主要な成果:
- 派生CD4 ((76-94) 製品を含むペプチド混合物は,有意な抗シンチチアル活性を示した.
- 配列の特異性とベンジル誘導は,抗ウイルス薬の有効性にとって決定的でした.
- Cys86とGlu87でのディベンジル化などのコア7残基の断片と特定の改変により,活性が強化されました.
結論:
- 派生CD4ペプチド,特にS-ベンジル-CD4 ((83-94),HIVとSIV誘発細胞融合とHIV感染を効果的に抑制する.
- ペプチド誘導は,ペプチドの構成を変更することによって,抗ウイルス効果を高めるようです.
- これらの発見は,HIV/AIDSに対するペプチドベースの治療法の開発の可能性を示唆しています.
関連する概念動画
Retrovirus Life Cycles
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
Inhibitors of Viral Protein Synthesis
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...
Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Antiviral Nucleoside Inhibitors
Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...

