渗透
化学
炔烃
脂质体
组合化学
膜
小泡
点击化学
膜透性
小分子
高通量筛选
生物物理学
色谱法
纳米技术
有机化学
生物化学
生物
催化作用
材料科学
作者
Juan Hu,Alix I. Chan,Emel Adaligil,Ivy Kekessie,Mifune Takahashi,Aimin Song,Christian N. Cunningham,Brian M. Paegel
标识
DOI:10.1021/acs.jmedchem.3c00138
摘要
Combinatorial library screening increasingly explores chemical space beyond the Ro5 (bRo5), which is useful for investigating "undruggable" targets but suffers compromised cellular permeability and therefore bioavailability. Moreover, structure-permeation relationships for bRo5 molecules are unclear partially because high-throughput permeation measurement technology for encoded combinatorial libraries is still nascent. Here, we present a permeation assay that is scalable to combinatorial library screening. A liposomal fluorogenic azide probe transduces permeation of alkyne-labeled molecules into small unilamellar vesicles via copper-catalyzed azide-alkyne cycloaddition. Control alkynes (e.g., propargylamine, various alkyne-labeled PEGs) benchmarked the assay. Cell-permeable macrocyclic peptides, exemplary bRo5 molecules, were alkyne labeled and shown to retain permeability. The assay was miniaturized to microfluidic droplets with high assay quality (Z' ≥ 0.5), demonstrating excellent discrimination of photocleaved known membrane-permeable and -impermeable model library beads. Droplet-scale permeation screening will enable pharmacokinetic mapping of bRo5 libraries to build predictive models.
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