関連する実験動画
Updated: Feb 7, 2026
16:43
Visualization of Endoplasmic Reticulum Subdomains in Cultured Cells
Published on: February 18, 2014
13.7K
酵素アセンブリは膜を破壊し,選択的な癌細胞死亡を標的とする
Zhaoqianqi Feng1, Huaimin Wang1, Shiyu Wang2
1Department of Chemistry , Brandeis University , 415 South Street , Waltham , Massachusetts 02454 , United States.
Journal of the American Chemical Society
|July 12, 2018
まとめ
研究者らは半月形ペプチドを 開発し,がん細胞膜を破壊し,内プラズマ網膜 (ER) を標的とし,選択的ながん細胞死を引き起こした. この革新的なアプローチは,ERを標的としたがん治療のための新しい戦略を提供します.
科学分野:
- 生物化学
- 分子生物学
- ガン治療薬
背景:
- タンパク質の合成,折りたたみ,およびカルシウムホメオスタシスにおいて重要な役割を果たします.
- ERはがん治療の新興の標的ですが,選択的な標的化戦略は限られています.
- 癌細胞の膜を 破壊することは 治療方法の可能性があるのです
研究 の 目的:
- 癌細胞を標的とする新しいペプチドアセンブリを開発する.
- 癌細胞死を引き起こすペプチド組成のメカニズムを調査する.
- 癌の治療に エンドプラズマ網を標的とする可能性を 探求する.
主な方法:
- 超分子ペプチドアセンブリの酵素生成
- 膜の相互作用と整合性を評価するために沈着測定と生細胞イメージングを行う.
- 伝送電子顕微鏡 (TEM),静的光散乱 (SLS),および構造分析のための臨界ミセル濃度 (CMC).
- 光成像,ウェスタン・ブロット,ELISAでER蓄積,ERストレス,およびカスパース活性化を評価する.
主要な成果:
- 半月形のペプチドアセンブリが成功して合成され,脂質膜と相互作用することが示された.
- これらの組み合わせは 細胞膜の整合性を損ない 細胞死につながります
- 集合体は内プラズマの網膜に蓄積し,ERストレスを誘発し,カスパースに依存する細胞死経路を活性化します.
- 半月の形状は膜の相互作用と細胞運命を決定する上で重要です.
結論:
- 酵素で生成された半月形のペプチド組は,がん細胞膜を効果的に破壊し,選択的にERを標的とする.
- このアプローチは,ERストレスとカスパース活性化によって癌細胞死を誘発します.
- これらのペプチドアセンブリは ERを標的とした新種の抗癌薬の開発のための有望な新しい戦略を表しています.
関連する概念動画
01:39Endoplasmic Reticulum
109.4K
The Endoplasmic Reticulum (ER) in eukaryotic cells is a substantial network of interconnected membranes with diverse functions, from calcium storage to biomolecule synthesis. A primary component of the endomembrane system, the ER manufactures phospholipids critical for membrane function throughout the cell. Additionally, the two distinct regions of the ER specialize in the manufacture of specific lipids and proteins.
109.4K
01:43The Endoplasmic Reticulum
21.5K
The endoplasmic reticulum or ER makes up for more than half of the membranes in a cell and accounts for 10% of total cell volume. It is also the primary protein and lipid synthesis factory for most cell organelles, such as the Golgi apparatus, lysosomes, secretory vesicles, and the plasma membrane. Despite being the most extensive and functionally complex subcellular organelle, ER was the last to be discovered. After years of deliberation, Keith Porter and George Palade in the year 1954,...
21.5K
01:21Smooth Endoplasmic Reticulum
8.1K
Smooth endoplasmic reticulum or smooth ER is a sub-organelle with specialized functions in animal cells and plant cells. It is often associated with the tubule morphology of the endoplasmic reticulum.
The ER provides optimal conditions for synthesizing steroid hormones and lipids, such as phospholipids and triglycerides. Traditionally, lipid metabolism was considered to be a smooth ER function. However, there is no direct evidence to prove that rough ER is completely excluded from lipid...
The ER provides optimal conditions for synthesizing steroid hormones and lipids, such as phospholipids and triglycerides. Traditionally, lipid metabolism was considered to be a smooth ER function. However, there is no direct evidence to prove that rough ER is completely excluded from lipid...
8.1K
01:34Directing Proteins to the Rough Endoplasmic Reticulum
17.8K
The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
17.8K
02:57Targeted Cancer Therapies
8.9K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
8.9K
01:18Autophagic Cell Death
4.6K
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
4.6K