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Due to the destructive nature of sequencing, it remains challenging to link the scRNA-seq snapshots sampled at different time points. Here we present TIGON, a dynamic, unbalanced optimal transport algorithm that reconstructs dynamic trajectories and population growth simultaneously as well as the underlying gene regulatory network from multiple snapshots. To tackle the high-dimensional optimal transport problem, we introduce a deep learning method using a dimensionless formulation based on the Wasserstein\u2013Fisher\u2013Rao (WFR) distance. TIGON is evaluated on simulated data and compared with existing methods for its robustness and accuracy in predicting cell state transition and cell population growth. Using three scRNA-seq datasets, we show the importance of growth in the temporal inference, TIGON\u2019s capability in reconstructing gene expression at unmeasured time points and its applications to temporal gene regulatory networks and cell\u2013cell communication inference.<\/jats:p>","DOI":"10.1038\/s42256-023-00763-w","type":"journal-article","created":{"date-parts":[[2023,11,30]],"date-time":"2023-11-30T17:01:49Z","timestamp":1701363709000},"page":"25-39","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":82,"title":["Reconstructing growth and dynamic trajectories from single-cell transcriptomics data"],"prefix":"10.1038","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5530-734X","authenticated-orcid":false,"given":"Yutong","family":"Sha","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7058-6428","authenticated-orcid":false,"given":"Yuchi","family":"Qiu","sequence":"additional","affiliation":[]},{"given":"Peijie","family":"Zhou","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8804-3368","authenticated-orcid":false,"given":"Qing","family":"Nie","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,11,30]]},"reference":[{"key":"763_CR1","doi-asserted-by":"publisher","first-page":"1187","DOI":"10.1016\/j.cell.2015.04.044","volume":"161","author":"AM Klein","year":"2015","unstructured":"Klein, A. 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