アンドロゲン反応要素を標的としたサイクリックピロール-イミダゾールポリアミド
David M Chenoweth1, Daniel A Harki, John W Phillips
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
Journal of the American Chemical Society
|May 6, 2009
まとめ
サイクルピロルイミダゾール (Py-Im) ポリアミドは,遺伝子調節に対する新しいアプローチを提供します. これらの細胞浸透性分子は,高親近性DNA結合を示し,遺伝子発現を効果的に調節し,治療応用において有望であることを示しています.
科学分野:
- 薬用化学 薬用化学について
- 分子生物学は分子生物学である.
- オーガニック・シンセシス オーガニック・シンセシス
背景:
- ピロールイミダゾール (Py-Im) ポリアミドは,細胞に浸透するDNA結合分子である.
- 転写因子-DNAの相互作用を妨害し,遺伝子発現を調節することができます.
- サイクルポリアミドは,あまり研究されていない建築ですが,合成的な課題に直面しています.
研究 の 目的:
- サイクルポリアミドのための高収量合成を開発する.
- 新型周期性Py-ImポリアミドのDNA結合特性および遺伝子調節効果を調査する.
- アンドロゲン応答要素 (ARE) とアンドロゲン受容体 (AR) 経路を標的とする.
主な方法:
- サイクルポリアミドに適用された溶液相合成方法.
- 合成のアクセシビリティを改善するために,高収量サイクリングステップ.
- 5'-WGWWCW-3'配列をターゲットとするサイクル8環のPy-Imポリアミドの特性.
主要な成果:
- 改善されたサイクリング法でサイクリック8環のPy-Imポリアミド1-3を成功して合成した.
- 標的のARE配列に対して,非常に高いDNA結合親和性を示した.
- 細胞培養におけるAR標的遺伝子の調節が観察され,細胞の浸透性を示した.
結論:
- サイクル型Py-Imポリアミドは,開発された方法論を使用して効率的に合成することができます.
- これらの周期性ポリアミドは,強力なDNA結合および遺伝子調節活性を示します.
- サイクルアーキテクチャは,細胞の浸透性と遺伝子調節のための治療的可能性を高めます.
さらに関連する動画
関連する概念動画
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Internal Receptors
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.
Allosteric Proteins-ATCase
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
Transducer Mechanism: Nuclear Receptors
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Transducer Mechanism: Enzyme-Linked Receptors
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
Adrenergic Antagonists: Chemistry and Classification of ɑ-Receptor Blockers
Adrenergic antagonists, or sympatholytics, inhibit adrenoceptor activation driven by catecholamines or agonists. Based on their adrenoceptor specificity, adrenergic blockers can be categorized into two primary groups: α-adrenergic blockers (α-blockers) and β-adrenergic blockers (β-blockers). α-blockers interact with α1 and α2 subtypes of α-adrenoceptors.
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline moieties. Phenoxybenzamine, with a haloalkylamine...
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline moieties. Phenoxybenzamine, with a haloalkylamine...


