溶性受容体分子によるSIV感染の強化
まとめ
再結合可溶性CD4 (rCD4) は,ヒトT細胞におけるシミアン免疫不全ウイルス (SIVagm) 感染を,HIV-1に対する抑制効果とは異なり,驚くほど強化した. これは,rCD4結合がウイルス膜を調節し,SIVagmの侵入を助けることを示唆しています.
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
- 細胞生物学 細胞生物学
背景:
- CD4受容体は,ヒトT細胞のヒト免疫不全ウイルス1型 (HIV-1) 感染において極めて重要です.
- Simian immunodeficiency virus (SIVagm) は,アフリカの緑色のサルに感染するHIVのようなウイルスです.
研究 の 目的:
- SIVagm感染におけるT細胞表面受容体の役割を調査する.
- 再結合溶性CD4 (rCD4) がSIVagm感染を抑制できるかどうかを判断する.
主な方法:
- 人間のT細胞系におけるSIVagm感染に対するrCD4の効果を試験する.
- シンチチウム形成とデノボのタンパク質合成を観察する.
- rCD4に対するモノクローナル抗体と,感染したサルからの抗体を用いる.
主要な成果:
- rCD4はSIVagmの感染を最大18倍まで強化し,同時にHIV-1を阻害しました.
- SIVagm感染は,迅速なシンチチウム形成とrCD4.4によるタンパク質合成を示した.
- rCD4に対する抗体と感染したサルからの抗体は,rCD4媒介の増強を阻害した.
結論:
- rCD4はSIVagm感染を強化し,HIV-1に対する効果とは対照的です.
- rCD4がSIVagmに結合すると,ウイルスの膜を調節し,融合と侵入を促進する可能性があります.
- この相互作用は,HIV-1とSIVagmとの間のウイルストロピズムと受容体の使用における違いを強調しています.
関連する概念動画
Bioavailability Enhancement: Drug Solubility Enhancement
266
Body:Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
266
Factors Affecting Solubility
37.2K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
37.2K
Solubility of Ionic Compounds
68.3K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
68.3K
Solubility Equilibria
57.6K
Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many natural and technological processes, ranging from tooth decay to water purification. An understanding of the factors affecting compound solubility is, therefore, essential to the effective management of these processes. This section applies previously introduced equilibrium concepts and tools to systems involving dissolution and precipitation.
The...
The...
57.6K
Internal Receptors
74.7K
Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.
74.7K
Physical Properties Affecting Solubility
26.8K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
26.8K


