関連する実験動画
Updated: Jan 26, 2026

07:11
Constructing Cyclic Peptides Using an On-Tether Sulfonium Center
Published on: September 28, 2022
3.1K
ストレント・サイクリック・ディスルフィードは,トランスファーリン受容体と反応して細胞の吸収を可能にします
Daniel Abegg1, Giulio Gasparini1, Dominic G Hoch1
1School of Chemistry and Biochemistry, National Centre of Competence in Research (NCCR) Chemical Biology, University of Geneva , CH-1211 Geneva, Switzerland.
Journal of the American Chemical Society
|December 22, 2016
まとめ
新しいアスパラガス酸タグ (AspAタグ) は,保護されていないペプチドの効率的な細胞吸収を可能にします. この方法は,癌細胞にペプチドを送り込み,トランスファーリン受容体ターゲットを介してアポトーシスを誘導します.
科学分野:
- 生物化学
- 分子生物学
- 細胞生物学
背景:
- 治療用ペプチドを 細胞に効率的に 送り込むことは まだ課題です
- 保護されていないペプチドは,しばしば安定性が低下し,細胞の浸透が制限される.
- 標的型投与システムは,治療効果を高め,標的外効果を軽減するために不可欠です.
研究 の 目的:
- 細胞にペプチドを投与する 新しく効率的な方法を開発する
- アスパラガス酸で標識されたペプチドの吸収メカニズムを調査する.
- 癌細胞にアポトーシスを誘導するために
主な方法:
- 単一のアスパラガス酸残留物 (AspAタグ) をペプチドに結合する.
- BH3ドメインペプチドを使用した癌細胞におけるアポトーシスの誘発のためのAspAタグペプチドの適用.
- AspAタグの分子標的を特定するための化学プロテオミクス
- AspAタグとトランスファーリン受容体の相互作用の調査.
主要な成果:
- AspAタグは,保護されていないペプチドの効率的な細胞吸収と細胞内分布を保証します.
- AspAタグのBH3ドメインペプチドは,がん細胞におけるアポトーシスを成功裏に誘導した.
- 移植リン受容体におけるAspA部分とシステイン556/558の共性結合形成が吸収メカニズムとして特定された.
- AspA-タグされたペイロードのトランスファーリン受容体媒介の内細胞吸収が確認された.
結論:
- AspAタグは小型で無毒で非常に効率的なペプチド配送システムです.
- タグは,標的細胞への侵入のためにトランスファーリン受容体を利用します.
- この方法はがん治療を含む様々な生命科学の応用に 重要な可能性を秘めています
関連する概念動画
The Early Endosome: Endocytosis of Transferrin
4.7K
Essential proteins such as insulin or low-density lipoprotein (LDL) and micronutrients such as iron enter a eukaryotic cell through receptor-mediated endocytosis. Subsequently, the early endosomes fuse with the vesicles containing such receptor-ligand complexes and play a vital role in sorting the incoming ligands and receptors. While the ligands are either degraded inside the vesicle or released into the cytosol, their receptors are returned to the plasma membrane for further rounds of...
4.7K
Receptor-mediated Endocytosis
110.7K
Overview
110.7K
Stereoisomerism of Cyclic Compounds
11.0K
In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
11.0K
Enzyme-linked Receptors
86.4K
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
86.4K
Internal Receptors
74.4K
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.
74.4K
Cyclic Processes And Isolated Systems
3.4K
A thermodynamic system with zero heat exchange and work is an isolated system. For these systems, the internal energy remains constant.
In the case of a non-isolated system, the change in the internal energy is zero only if the process is cyclic. A thermodynamic process is considered cyclic if the system undergoes a series of changes and returns to its initial state.
Consider a cyclic process that returns to its initial state, undergoing a four-step process. The heat transfer along each...
In the case of a non-isolated system, the change in the internal energy is zero only if the process is cyclic. A thermodynamic process is considered cyclic if the system undergoes a series of changes and returns to its initial state.
Consider a cyclic process that returns to its initial state, undergoing a four-step process. The heat transfer along each...
3.4K

