Dr Thomas Ichim cites Nature paper

Dr. Thomas Ichim said in an X post on September 7 that a Nature paper on “global transcriptional profiling of living cells” showed how fast the field is moving, linking readers to a study on single-cell transcription methods. The post pointed to a 2024 Nature paper describing scGRO-seq, a method for measuring nascent RNA in individual cells across the genome. Nature published the paper online on June 5, 2024, according to the journal record. The article’s authors said the method was designed to capture active transcription with higher temporal precision than standard single-cell RNA readouts. (nature.com) ### Which paper was Ichim pointing to? Nature’s linked paper is titled “Single-cell nascent RNA sequencing unveils coordinated global transcription,” and it lists Dig B. Mahat, Nathaniel D. Tippens, Jorge D. Martin-Rufino, Sean K. Waterton, Jiayu Fu, Sarah E. Blatt and Phillip A. Sharp among the authors. The paper says scGRO-seq uses global run-on sequencing with click chemistry to quantify nascent transcription from genes and enhancers at single-cell level. (nature.com) The June 5, 2024 publication date matters because Ichim’s September 7, 2026 post was not flagging a newly published paper. He was resurfacing an existing study and using it as an example of recent scientific progress, based on the paper he linked in the post context provided. ### What does “nascent RNA” add that ordinary single-cell RNA methods do not? The Nature paper says nascent RNA assays measure transcription as it is happening, rather than mainly capturing the accumulated pool of mature RNA already present in a cell. (nature.com) The authors wrote that this matters because key questions about temporal regulation and enhancer-gene coordination had remained unresolved “primarily because of the absence of a single-cell perspective on active transcription.” The study says scGRO-seq can estimate transcriptional burst size and frequency by directly quantifying transcribing RNA polymerases in individual cells. The authors also wrote that the method can use replication-dependent histone gene transcription to track cell-cycle dynamics and identify enhancer-gene networks with single-nucleotide spatial and temporal resolution. ### What did the authors say they found? The paper reports “the episodic nature of transcription” and the co-transcription of functionally related genes across the genome. (nature.com) The authors said their results suggested that transcriptional bursting at super-enhancers precedes bursting from associated genes. Nature Methods, in a related research highlight, said the work captures nascent transcripts in single cells and addresses a gap left by conventional single-cell transcriptomic technologies, which have been strong at profiling expression states but weaker at directly measuring ongoing transcription. (nature.com) ### Did Ichim’s post include the dataset details itself? Ichim’s post, as described in the source brief, highlighted the paper and the pace of scientific progress but did not provide dataset counts or an accession number. (nature.com) The paper itself, however, is accompanied on Nature’s site by supplementary materials, and Nature’s author guidance says accession numbers for relevant deposited datasets are expected by or before acceptance for publication. That distinction matters for readers trying to trace the underlying data. (nature.com) The social post served as a pointer to the paper, while the paper and its attached materials are the place where methodological specifics and supporting files are documented. ### Where would a reader look next? Nature’s article page and PDF are the next stop for readers who want the full methods, author list and supplementary information tied to the scGRO-seq study. The paper’s DOI is listed on the journal page, and the supplementary files are linked alongside the publication record. (nature.com 1) (nature.com 2) (nature.com 3)