人体細胞におけるカンナビノイド CB2受容体発現とリガンドの関与の評価を可能にする選択的フォトアフィニティプロブ
Marjolein Soethoudt, Sara C Stolze, Matthias V Westphal1
1Laboratorium für Organische Chemie , Eidgenössische Technische Hochschule Zürich , Vladimir-Prelog-Weg 3 , Zürich 8093 , Switzerland.
Journal of the American Chemical Society
|February 9, 2018
まとめ
研究者は2型カンナビノイド受容体 (CB2R) のための新しい光反応性探査機LEI121を開発しました. このツールは,ヒトの免疫細胞における CB2Rの標的の関与の研究と視覚化を可能にし,薬物発見を支援します.
科学分野:
- 薬理学について
- 化学生物学
- 免疫学
背景:
- Gタンパク質結合受容体 (GPCR) は重要な薬物標的である.
- 2型カンナビノイド受容体 (CB2R) のようなGPCRを研究するための化学的ツールの開発は,疾患におけるその役割を理解するために不可欠です.
- CB2Rは炎症性疾患と組織損傷の治療に有望な標的です.
研究 の 目的:
- CB2Rのための新しい,選択的,そして光反応性化学探査機を開発する.
- 標的の関与を評価し,内生受容体発現を視覚化するための探査機の有用性を実証する.
- ヒトの免疫細胞に 適用できるかを検証する
主な方法:
- アルキンハンドル付きの二機能の光反応性探査機LEI121の合成と特徴付け
- LEI121を使用したCB2Rのフォトアフィニティラベリング.
- クリック・ケミストリーによる レポーターグループの紹介
- HL-60および原始ヒト免疫細胞における内生CB2R発現と関与のフロー細胞測定分析.
主要な成果:
- LEI121は,光活性化時にCB2Rを共振的に結合する最初のCB2R選択型バイ機能プローブです.
- LEI121のアルキンハンドルは,レポーター分子の容易な導入を可能にする.
- LEI121はヒトの免疫細胞における内生CB2Rのターゲットエンゲージメント研究と視覚化に成功しました.
- この探査機はGPCR発現と活性化を監視する効果を示した.
結論:
- LEI121のような戦略的に設計された光反応探査機は,GPCRを研究するための貴重なツールです.
- LEI121によるタンデム・フォトクリック化学は,ヒト細胞における内生GPCR発現と関与のモニタリングを可能にします.
- このアプローチは,CB2R関連疾患のトランスレーション薬剤発見におけるバイオマーカーの開発に大きな希望をもたらします.
関連する概念動画
Ligand Binding Sites
15.3K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
15.3K
Ligand Binding and Linkage
5.7K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
5.7K
Internal Receptors
74.8K
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.
74.8K
Cell Specific Gene Expression
16.6K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
16.6K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
4.2K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
4.2K
Metal-Ligand Bonds
24.5K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.5K


