ヘテロディメア磁性ナノスイッチの遠隔制御 幹細胞の結合と分化を調節する
Heemin Kang1, Hee Joon Jung2,3,4, Dexter Siu Hong Wong1
1Department of Biomedical Engineering , The Chinese University of Hong Kong , Hong Kong , China.
Journal of the American Chemical Society
|April 24, 2018
まとめ
研究者はArg-Gly-Asp (RGD) ペプチドのプレゼンテーションを制御する磁性ナノスイッチを開発した. この非侵襲的方法は,細胞結合と微分化の遠隔制御を可能にします.
科学分野:
- バイオマテリアル科学
- ナノテクノロジー
- 細胞生物学
背景:
- バイオアクティブ・リガンドのプレゼンテーションを制御することは,細胞機能の調節に不可欠です.
- 既存の方法には 遠隔操作,非侵襲,可逆制御が 欠けていることが多いのです
- Arg-Gly-Asp (RGD) ペプチドは,インテグリン結合と細胞反応に不可欠である.
研究 の 目的:
- RGDペプチドプレゼンテーションの遠隔,非侵襲,および可逆制御のための新しい戦略を開発する.
- RGDを物理的に開封するために磁場の使用を調査する.
- 幹細胞の粘着,分化,およびメカニカルセンシングの調節を示す.
主な方法:
- ヘテロディメアナノスイッチの製造:磁性ナノケージ (MNC) が,柔軟なリンク器を介してRGDコーティングされた金ナノ粒子 (AuNP) と結合される.
- AuNPに対するMNCの動きを制御するために磁場を使用し,可逆的なRGD開きとケージを可能にします.
- 幹細胞の粘着,分化,および機械感知を in vitro および in vivo で評価する.
主要な成果:
- リバーシブルRGDプレゼンテーション制御のための磁性ナノスイッチの成功開発.
- 磁気操作によるインテグリン結合のRGDアクセシビリティの調節が実証された.
- 幹細胞の粘着,分化,およびメカノセンシングの有意な調節が観察されました.
- 細胞の行動に 臨時的なコントロールを in vitro と in vivo で達成しました
結論:
- 磁気ナノスイッチは RGDの表示に前例のない物理的および可逆的な制御を提供します.
- この技術は 細胞機能の遠隔,非侵襲的,深層組織制御を可能にします
- 再生医療や 細胞の行動を制御する 重要な応用が期待されています
関連する概念動画
Regulation of Hematopoietic Stem Cells
4.1K
All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
4.1K
Master Transcription Regulators
7.8K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.8K
Combinatorial Gene Control
9.7K
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
9.7K
Adult Stem Cells
33.9K
Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
33.9K
Embryonic Stem Cells
32.6K
Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
32.6K
Adhesion
44.6K
Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow...
Capillary action is a result of water’s adhesive tendencies. When a narrow...
44.6K


