高効率 (R-X-R) 型のカルバメットは,細胞伝達のための分子トランスポーターとして使用されます
Kiran M Patil1, Rangeetha J Naik, Rajpal
1Organic Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India.
Journal of the American Chemical Society
|April 19, 2012
まとめ
アルギニンに富んだペプチドにおけるカルバマート結合の修正は,それらの細胞浸透とDNA配送能力を著しく高めます. これらの改変ペプチドは,エネルギーに依存しないメカニズムを通じて,プラズミドDNAを哺乳類の細胞に効率的に送り込む.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
背景:
- (R-X-R) モチーフを持つアルギニンに富んだペプチドは,細胞に浸透する特性で知られている.
- ペプチド構造を改変することで,潜在的にその有効性と配送能力を高めることができます.
研究 の 目的:
- (R-X-R) モチーフペプチドにおけるアミド結合をカルバマート結合に置き換える効果を調査する.
- これらの改変されたオリゴマーの細胞浸透とDNA配送効率の向上を評価する.
主な方法:
- (r-ahx-r) (((4) と (r-ahx-r-r-apr-r) ((2)) など,カルバマート結合による変形アルギニン豊富なペプチドの合成.
- 哺乳類の細胞系におけるオリゴマーの内部化の評価.
- CHO-K1細胞へのプラズミドDNA配送の評価.
主要な成果:
- (R-X-R) ペプチドにおけるアミド結合をカルバマート結合に置き換えることで,オリゴメアの有効性が数倍に増加した.
- 哺乳類の細胞へのオリゴマーの内部化は,エネルギーに依存しないプロセスを経て発生した.
- CHO-K1細胞への生物学的活性プラズミドDNAの効率的な配送が達成されました.
結論:
- 炭酸塩結合改変は,アルギニンに富んだ細胞に浸透するペプチドの性能を高める有望な戦略です.
- これらの改変ペプチドは,効率的な遺伝子配送のための潜在的な非ウイルスベクターを提供します.
関連する概念動画
Carrier-Mediated Transport
Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Site-Targeted Drug Delivery Systems: Polymeric Carriers
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
Drug Absorption Mechanism: Carrier-Mediated Membrane Transport
Certain large, lipid-insoluble drug molecules that resemble amino acids, peptides, or glucose, require specialized carrier proteins to facilitate their diffusion across cell membranes. This transport can occur through either facilitated diffusion, which does not require energy input, or active transport, which does require energy input.
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
Cellular Membranes and Drug Transport
Drugs must traverse multiple biological barriers, such as multi-layered skin, single-layered intestinal epithelium, and the plasma membrane, to reach their target sites within the body. The plasma membrane, a highly structured composite of phospholipids, carbohydrates, and proteins, is the cell's protective boundary, facilitating selective substance exchange.
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
Mechanisms of Drug Absorption: Paracellular, Transcellular, and Vesicular Transport
Drugs need to permeate cell membranes to reach their target sites after administration. Orally administered drugs must transcend intestinal epithelial membrane barriers to infiltrate the systemic circulation. Drugs with a molecular weight of less than 500 Daltons diffuse through gaps between neighboring cells, called paracellular pathways.
However, most drugs use the transcellular route, traversing directly through the cell membranes via two mechanisms: passive and active transport. Passive...
However, most drugs use the transcellular route, traversing directly through the cell membranes via two mechanisms: passive and active transport. Passive...
Facilitated Diffusion
The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...


