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Encoded Silicon-Chip-Based Platform for Combinatorial Synthesis and Screening.
ACS Combinatorial Science Pub Date : 2017-03-07 , DOI: 10.1021/acscombsci.6b00181
Julian Vastl 1 , Tina Wang 1 , Thi B Trinh 1 , David A Spiegel 1
Affiliation  

Solid-supported chemical libraries have proven useful for the rapid and cost-effective discovery of bioactive compounds. However, traditional on-bead screening involves time-intensive chemical characterization of hit compounds and high false positive rates. Herein, we report a new platform for encoded chemical synthesis and solid-supported screening using p-Chips, microsized silicon microtransponders capable of storing and emitting unique numerical identifiers (IDs). By encoding the structures of library members using p-Chip IDs, we can track compound identities throughout both split-and-pool synthesis and protein binding assays without destructive cleavage. Thanks to the numerical IDs, our p-Chip platform can provide binding constants for library members simply by stripping and reprobing with different protein concentrations, unlike traditional on-bead assays. To showcase these features, we synthesized a library of 108 hemagglutinin (HA) peptide variants using split-and-pool approach, and measured EC50s for each variant directly on p-Chips. On-chip EC50s obtained from these studies showed excellent correlation (80%) with those obtained using traditional ELISA methods. Our screen also yielded a false positive rate of 14%, markedly superior to that reported for conventional bead-based binding studies (66-96%).1-9 On the basis of these results, we believe the p-Chip platform has the potential to improve the effectiveness of solid-supported high-throughput screening by a significant margin.

中文翻译:

编码的基于硅芯片的平台,用于组合合成和筛选。

事实证明,固体支持的化学文库可用于快速,经济高效地发现生物活性化合物。但是,传统的磁珠筛查涉及对命中化合物的费时的化学表征和较高的假阳性率。在此,我们报告了一个新的平台,用于使用p-Chips,能够存储和发射唯一数字标识符(ID)的微型硅微应答器进行化学合成和固相支持的筛选。通过使用p-Chip ID编码文库成员的结构,我们可以在拆分和合并合成以及蛋白质结合测定过程中跟踪化合物的身份,而不会进行破坏性切割。多亏了数字ID,我们的p-Chip平台可以简单地通过剥离和探测不同的蛋白质浓度为库成员提供结合常数,与传统的磁珠检测不同。为了展示这些功能,我们使用拆分和合并方法合成了108个血凝素(HA)肽变体的文库,并直接在p-Chips上测量了每个变体的EC50。从这些研究中获得的片上EC50与使用传统ELISA方法获得的EC50表现出极好的相关性(80%)。我们的筛选还产生了14%的假阳性率,明显优于传统的基于珠子的结合研究报告的假阳性率(66-96%)。1-9根据这些结果,我们相信p-Chip平台具有大大提高了固体支持的高通量筛选的效率的潜力。并直接在p-Chips上测量每种变体的EC50。从这些研究中获得的片上EC50与使用传统ELISA方法获得的EC50表现出极好的相关性(80%)。我们的筛选还产生了14%的假阳性率,明显优于传统的基于珠子的结合研究报告的假阳性率(66-96%)。1-9根据这些结果,我们相信p-Chip平台具有大大提高了固体支持的高通量筛选的效率的潜力。并直接在p-Chips上测量每种变体的EC50。从这些研究中获得的片上EC50与使用传统ELISA方法获得的EC50表现出极好的相关性(80%)。我们的筛选还产生了14%的假阳性率,明显优于传统的基于珠子的结合研究报告的假阳性率(66-96%)。1-9根据这些结果,我们相信p-Chip平台具有大大提高了固体支持的高通量筛选的效率的潜力。
更新日期:2017-03-06
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