Evidence map›Paper›PMID 25219855›Full record

ArticleNature2014

A Hox regulatory network of hindbrain segmentation is conserved to the base of vertebrates.

Hugo J Parker, Marianne E Bronner, Robb Krumlauf

Abstract read
In one paragraph

Article in Nature, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

50 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Evolution of the essential geneProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. On growth and form of animal behavior.Frontiers in integrative neuroscience · 2024
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Segmentation and patterning of the vertebrate hindbrain.Development (Cambridge, England) · 2021
    Review
  17. Article
  18. Review
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Hugo J ParkerStowers Institute for Medical Research, Kansas City, Missouri 64110, USA.
Marianne E BronnerDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, California 91125, USA.
Robb Krumlauf1] Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA [2] Department of Anatomy and Cell Biology, Kansas University Medical Center, Kansas City, Kansas 66160, USA.

Funding

Evolutionary Origin of Vertebrate Neural Crest Gene NetworksR01DE017911 · NIDCR · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI BRONNER, MARIANNE · 2007 to 2011
$2.7M
Regulatory Changes Mediating Emergence of Novel Neural Crest TraitsR01NS086907 · NINDS · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI BRONNER, MARIANNE · 2014 to 2018
$1.8M
NIDCR NIH HHS R01 DE017911NIDCR NIH HHS R01DE017911NINDS NIH HHS R01 NS086907NINDS NIH HHS R01NS086907
6 · The paper itself

Abstract

A defining feature governing head patterning of jawed vertebrates is a highly conserved gene regulatory network that integrates hindbrain segmentation with segmentally restricted domains of Hox gene expression. Although non-vertebrate chordates display nested domains of axial Hox expression, they lack hindbrain segmentation. The sea lamprey, a jawless fish, can provide unique insights into vertebrate origins owing to its phylogenetic position at the base of the vertebrate tree. It has been suggested that lamprey may represent an intermediate state where nested Hox expression has not been coupled to the process of hindbrain segmentation. However, little is known about the regulatory network underlying Hox expression in lamprey or its relationship to hindbrain segmentation. Here, using a novel tool that allows cross-species comparisons of regulatory elements between jawed and jawless vertebrates, we report deep conservation of both upstream regulators and segmental activity of enhancer elements across these distant species. Regulatory regions from diverse gnathostomes drive segmental reporter expression in the lamprey hindbrain and require the same transcriptional inputs (for example, Kreisler (also known as Mafba), Krox20 (also known as Egr2a)) in both lamprey and zebrafish. We find that lamprey hox genes display dynamic segmentally restricted domains of expression; we also isolated a conserved exonic hox2 enhancer from lamprey that drives segmental expression in rhombomeres 2 and 4. Our results show that coupling of Hox gene expression to segmentation of the hindbrain is an ancient trait with origin at the base of vertebrates that probably led to the formation of rhombomeric compartments with an underlying Hox code.

Indexed as

Evolution, MolecularAnimalsBase SequenceBody PatterningConserved SequenceEnhancer Elements, GeneticGene Expression Regulation, DevelopmentalGene Regulatory NetworksGenes, HomeoboxLampreysMolecular Sequence DataPhylogenyRhombencephalonVertebratesZebrafish

Identifiers

PMID25219855
PMCPMC4209185

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.