Cited by 148Single-cell and spatial transcriptomicsCircadian rhythm and melatoninLiver physiology and pathology

Space-time logic of liver gene expression at sub-lobular scale

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Droin, Colas, Kholtei, Jakob El, Bahar Halpern, Keren, Hurni, Clémence, Rozenberg, Milena, Muvkadi, Sapir, Itzkovitz, Shalev, Naef, Felix·2021·Nature Metabolism

Published version of a preprint

Abstract

The mammalian liver is a central hub for systemic metabolic homeostasis. Liver tissue is spatially structured, with hepatocytes operating in repeating lobules, and sub-lobule zones performing distinct functions. The liver is also subject to extensive temporal regulation, orchestrated by the interplay of the circadian clock, systemic signals and feeding rhythms. However, liver zonation has previously been analysed as a static phenomenon, and liver chronobiology has been analysed at tissue-level resolution. Here, we use single-cell RNA-seq to investigate the interplay between gene regulation in space and time. Using mixed-effect models of messenger RNA expression and smFISH validations, we find that many genes in the liver are both zonated and rhythmic, and most of them show multiplicative space-time effects. Such dually regulated genes cover not only key hepatic functions such as lipid, carbohydrate and amino acid metabolism, but also previously unassociated processes involving protein chaperones. Our data also suggest that rhythmic and localized expression of Wnt targets could be explained by rhythmically expressed Wnt ligands from non-parenchymal cells near the central vein. Core circadian clock genes are expressed in a non-zonated manner, indicating that the liver clock is robust to zonation. Together, our scRNA-seq analysis reveals how liver function is compartmentalized spatio-temporally at the sub-lobular scale.

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Crossref · 10.1038/s42255-020-00323-1

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  • Gluconeogenesis-regulating genes are induced in periportal hepatocytes following prolonged starvation at the end of the resting phase.

    “For example, gluconeogenesis-regulating genes are induced in periportal hepatocytes following prolonged starvation at the end of the resting phase.9,26”

    From Distinct hepatocyte identities in liver homeostasis and regeneration (2023) · cites this paper as [26]

    The Results (Single-cell RNA-seq captures space-time gene expression patterns in mouse liver; page unavailable) report that Pck1, a gluconeogenesis-regulating gene, is expressed portally and peaks shortly before ZT12. Another Results passage describes mice as metabolically fasted near the end of the light phase. The copy supports the spatial and temporal pattern, but identifies one gene and does not establish induction following prolonged starvation. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Morphogen expression, such as that of Wnt-family members, is shaped by hepatocyte zonation and can vary in time.

    “Beyond metabolism, morphogen expression, such as that of Wnt-family members, is also shaped by this zonation and can vary in time7.”

    From Spatial transcriptomics of healthy and fibrotic human liver at single-cell resolution (2025) · cites this paper as [7]

    The Results section reports that Wnt2 expression in pericentral non-parenchymal liver cells varies around the clock, supporting the temporal part of the claim. The Discussion describes Wnt ligands as forming a spatial gradient that contributes to zonated Wnt-target expression in hepatocytes; it does not show that hepatocyte zonation shapes morphogen expression. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Spatial gene expression in human hepatocytes is better described by a continuous variable determined by the relative distance between the portal and central areas of the lobule, similar to observations in mouse.

    “Collectively, these observations suggest that spatial gene expression in human hepatocytes is better described by a continuous variable determined by the relative distance between the portal and central areas of the lobule, similar to observations in mouse7,26,27.”

    From Spatial transcriptomics of healthy and fibrotic human liver at single-cell resolution (2025) · cites this paper as [7]

    The Results section describes spatial gene-expression profiles along the central–portal axis in mouse hepatocytes, supporting the comparison to mouse zonation. The study assigns cells to eight lobule layers using gene-expression landmarks; it does not establish that human hepatocyte expression is better described by a continuous variable determined by relative distance from the portal and central areas. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Close to the inlet, where oxygen concentrations are highest, increased levels of the periportal marker proteins ARG1, BAAT, PYGL, FBP1 and ASL were observed.

    “Close to the inlet, where oxygen concentrations are highest, we observed increased levels of the periportal marker proteins ARG1, BAAT, PYGL, FBP1 and ASL ( Fig. 6 a).”

    From 3D microperfusion of mesoscale human microphysiological liver models improves functionality and recapitulates hepatic zonation (2023) · cites this paper as [34]

    The Results section (‘smFISH analysis of space-time mRNA counts’; page unavailable) reports portal-biased Arg1 mRNA, and ‘Space-time logic of hepatic functions’ says oxygen is most abundant portally. These passages do not establish increased protein levels for ARG1, BAAT, PYGL, FBP1 and ASL near the inlet; the reported Arg1 measurement is of mRNA, and the other four markers are not substantiated by the passages found. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Expression of perivenous markers was significantly elevated close to the outlet where oxygenation is lower.

    “In contrast, expression of perivenous markers was significantly elevated close to the outlet where oxygenation is lower.”

    From 3D microperfusion of mesoscale human microphysiological liver models improves functionality and recapitulates hepatic zonation (2023) · cites this paper as [34]

    The Introduction (page unavailable) describes blood flowing from the portal side to the central vein, an accompanying oxygen gradient, and genes expressed more strongly near the central vein. The Discussion (page unavailable) also describes the central region as subject to hypoxic stress. These passages support the direction of the claim, but the cited text does not establish a statistically significant elevation of perivenous markers close to an outlet. (LLM, conf=0.81)

    Experimental — accuracy not yet measured

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Authors
Droin, C., Kholtei, J. E., Bahar Halpern, K., Hurni, C., Rozenberg, M., Muvkadi, S., Itzkovitz, S., & Naef, F.
Affiliations
  • École Polytechnique Fédérale de Lausanne (CH)
  • Weizmann Institute of Science (IL)
Corresponding author
Itzkovitz, Shalev
Venue
Nature Metabolism
Published
2021-01-11
Volume
3
Issue
1
Pages
43-58
ISSN
2522-5812 (ISSN-L)
OpenAlex
W3119677722
Cited by
148
References
71
Citations by year
2026: 23 · 2025: 26 · 2024: 27 · 2023: 31 · 2022: 26 · 2021: 13 · 2020: 1
FWCI
7.61
Type
journal article
Language
en
Open access
Locations
  • Nature Metabolism (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
Funders
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (310030_173079)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Single-cell and spatial transcriptomics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
liver zonation, circadian clock, gene expression rhythms, hepatocyte heterogeneity, Wnt signaling, central vein, non-parenchymal cells, molecular chaperones, lipid metabolism, carbohydrate metabolism, amino acid metabolism
MeSH terms
Algorithms, Amino Acids, Animals, Liver, Male, Mice, Inbred C57BL, Periodicity, RNA, Messenger, Gene Expression, Molecular Chaperones, Gene Expression Profiling, Hepatocytes, Carbohydrate Metabolism, Lipid Metabolism, Mice, Period Circadian Proteins, Circadian Clocks, Wnt Signaling Pathway

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