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These responses are possible, in part, due to the presence of an elaborate gene regulatory network (GRN) in every single cell. In the past 20 years, many groups worked on reconstructing the topological structure of GRNs from large-scale gene expression data using a variety of inference algorithms. Insights gained about participating players in GRNs may ultimately lead to therapeutic benefits. Mutual information (MI) is a widely used metric within this inference\/reconstruction pipeline as it can detect any correlation (linear and non-linear) between any number of variables (\n                      <jats:italic>n<\/jats:italic>\n                      -dimensions). However, the use of MI with continuous data (for example, normalized fluorescence intensity measurement of gene expression levels) is sensitive to data size, correlation strength and underlying distributions, and often requires laborious and, at times, ad hoc optimization.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      In this work, we first show that estimating MI of a bi- and tri-variate Gaussian distribution using\n                      <jats:italic>k<\/jats:italic>\n                      -nearest neighbor (kNN) MI estimation results in significant error reduction as compared to commonly used methods based on fixed binning. Second, we demonstrate that implementing the MI-based kNN Kraskov\u2013Sto\u00f6gbauer\u2013Grassberger (KSG) algorithm leads to a significant improvement in GRN reconstruction for popular inference algorithms, such as Context Likelihood of Relatedness (CLR). Finally, through extensive in-silico benchmarking we show that a new inference algorithm CMIA (Conditional Mutual Information Augmentation), inspired by CLR, in combination with the KSG-MI estimator, outperforms commonly used methods.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Using three canonical datasets containing 15 synthetic networks, the newly developed method for GRN reconstruction\u2014which combines CMIA, and the KSG-MI estimator\u2014achieves an improvement of 20\u201335% in precision-recall measures over the current gold standard in the field. This new method will enable researchers to discover new gene interactions or better choose gene candidates for experimental validations.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12859-022-05047-5","type":"journal-article","created":{"date-parts":[[2023,3,6]],"date-time":"2023-03-06T11:02:38Z","timestamp":1678100558000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Gene regulation network inference using k-nearest neighbor-based mutual information estimation: revisiting an old DREAM"],"prefix":"10.1186","volume":"24","author":[{"given":"Lior I.","family":"Shachaf","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elijah","family":"Roberts","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrick","family":"Cahan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jie","family":"Xiao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,3,6]]},"reference":[{"key":"5047_CR1","doi-asserted-by":"publisher","unstructured":"Alberts B, Johnson A, Lewis J, Raff M, Roberts K, Walter P (2007) Molecular biology of the cell. 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