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Understanding how cell states can be programmed through small molecules\/drugs or conditions by modulating the whole gene expression system granted us the potential to amend abnormal cells and cure diseases. Condition Orientated Regulatory Networks (CORN, https:\/\/qinlab.sysu.edu.cn\/home) is a library of condition (small molecule\/drug treatments and gene knockdowns)-based transcriptional regulatory sub-networks (TRSNs) that come with an online TRSN matching tool. It allows users to browse condition-associated TRSNs or match those TRSNs by inputting transcriptomic changes of interest. CORN utilizes transcriptomic changes data after specific conditional treatment in cells, and in vivo transcription factor (TF) binding data in cells, by combining TF binding information and calculations of significant expression alterations of TFs and genes after the conditional treatments, TRNs under the effect of different conditions were constructed. In short, CORN associated 1805 different types of specific conditions (small molecule\/drug treatments and gene knockdowns) to 9553 TRSNs in 25 human cell lines, involving 204TFs. By linking and curating specific conditions to responsive TRNs, the scientific community can now perceive how TRNs are altered and controlled by conditions alone in an organized manner for the first time. This study demonstrated with examples that CORN can aid the understanding of molecular pathology, pharmacology and drug repositioning, and screened drugs with high potential for cancer and coronavirus disease 2019 (COVID-19) treatments.<\/jats:p>","DOI":"10.1093\/bib\/bbac402","type":"journal-article","created":{"date-parts":[[2022,9,20]],"date-time":"2022-09-20T09:11:25Z","timestamp":1663665085000},"source":"Crossref","is-referenced-by-count":6,"title":["CORN\u2014Condition Orientated Regulatory Networks: bridging conditions to gene networks"],"prefix":"10.1093","volume":"23","author":[{"given":"Ricky Wai Tak","family":"Leung","sequence":"first","affiliation":[{"name":"School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University , Shenzhen, 518107, China"},{"name":"College of Professional and Continuing Education, The Hong Kong Polytechnic University , Kowloon, Hong Kong, 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