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関連する概念動画

Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
Peroxisomes01:24

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...

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関連する実験動画

Updated: Jun 29, 2026

SNARE-mediated Fusion of Single Proteoliposomes with Tethered Supported Bilayers in a Microfluidic Flow Cell Monitored by Polarized TIRF Microscopy
10:58

SNARE-mediated Fusion of Single Proteoliposomes with Tethered Supported Bilayers in a Microfluidic Flow Cell Monitored by Polarized TIRF Microscopy

Published on: August 24, 2016

レドックス誘発によるリポソームからの含有物放出.

Winston Ong1, Yuming Yang, Angela C Cruciano

  • 1Department of Chemistry and Center for Biomodular Multiscale Systems, Louisiana State University, Baton Rouge, Louisiana 70803, USA.

Journal of the American Chemical Society
|October 10, 2008
PubMed
まとめ

研究者らは,標的型薬物投与のための新しいキノン-ダイオレオイル・フォスファディチルエタノアミン (Q-DOPE) リポソームを開発した. これらのリポソームは,特定の酵素の活動に反応して,ペイロードを放出し,がんなどの疾患の治療に有望であることが示されています.

科学分野:

  • バイオケミストリー バイオケミストリー
  • マテリアルサイエンス 材料科学
  • ナノテクノロジー ナノテクノロジー

背景:

  • 反応性リポソームは,内生酵素によって誘発されたペイロードを放出することによって,サイト特有の薬物投与を提供します.
  • 現存するトリガーされたリポソームシステムは限られているため,さまざまなアップレギュレーションされた酵素を標的とした新しい反応性リポソームの開発が必要である.

研究 の 目的:

  • 新型キノン-ダイオレオイル・フォスファディテイルエタノアミン (Q-DOPE) リポソームを合成し,特徴づけ,誘発されたペイロードの放出のために.
  • Q-DOPEリポソームのリドックス活性化放出機構を調査する.

主な方法:

  • "トリメチルロック"のキノン・レドックス・スイッチによるQ-DOPE脂質の合成.
  • 安定した,直径約100 nmのリポソームの準備.
  • リドックス活性化およびキノンヘッドグループの酵素誘発の割れ目に起因する有用負荷の解放の評価.

主要な成果:

  • 安定したQ-DOPEリポソーム (約. 100 nm) が成功裏に合成されました.
  • クイノンのヘッドグループのリドックス活性化により,完全なペイロードの解放が達成されました.
  • "トリメチルロック"スイッチを変更すると,ペイロードの解放メカニズムが無効になり,その役割が確認されました.

さらに関連する動画

Single Liposome Measurements for the Study of Proton-Pumping Membrane Enzymes Using Electrochemistry and Fluorescent Microscopy
12:15

Single Liposome Measurements for the Study of Proton-Pumping Membrane Enzymes Using Electrochemistry and Fluorescent Microscopy

Published on: February 21, 2019

A Model Membrane Platform for Reconstituting Mitochondrial Membrane Dynamics
10:31

A Model Membrane Platform for Reconstituting Mitochondrial Membrane Dynamics

Published on: September 2, 2020

関連する実験動画

Last Updated: Jun 29, 2026

SNARE-mediated Fusion of Single Proteoliposomes with Tethered Supported Bilayers in a Microfluidic Flow Cell Monitored by Polarized TIRF Microscopy
10:58

SNARE-mediated Fusion of Single Proteoliposomes with Tethered Supported Bilayers in a Microfluidic Flow Cell Monitored by Polarized TIRF Microscopy

Published on: August 24, 2016

Single Liposome Measurements for the Study of Proton-Pumping Membrane Enzymes Using Electrochemistry and Fluorescent Microscopy
12:15

Single Liposome Measurements for the Study of Proton-Pumping Membrane Enzymes Using Electrochemistry and Fluorescent Microscopy

Published on: February 21, 2019

A Model Membrane Platform for Reconstituting Mitochondrial Membrane Dynamics
10:31

A Model Membrane Platform for Reconstituting Mitochondrial Membrane Dynamics

Published on: September 2, 2020

結論:

  • Q-DOPEリポソームは,トリガーされたリポソーム配送システムの新しいクラスを表しています.
  • これらのリポソームは,キノンヘッドグループのリドックス分裂によって活性化され,サイト固有のペイロードの解放を可能にします.
  • Q-DOPEリポソームは,がんや炎症性疾患など,キノン還元酵素過剰発現に関連した疾患の治療に役立つ可能性がある.