Evidence map›Paper›PMID 26304726›Full record

ArticleThe Journal of cell biology2015

An organelle-exclusion envelope assists mitosis and underlies distinct molecular crowding in the spindle region.

Nina Schweizer, Nisha Pawar, Matthias Weiss, Helder Maiato

Abstract read
In one paragraph

Article in The Journal of cell biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing 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

37 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Mitotic spindle membranes.Molecular biology of the cell · 2025
    Review
  5. Exclusion of the endoplasmic reticulum from themicroPublication biology · 2025
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Contribution of cytoplasm viscoelastic properties to mitotic spindle positioning.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  13. Article
  14. Review
  15. Nuclear envelope remodelling during mitosis.Current opinion in cell biology · 2021
    Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors.

Nina SchweizerChromosome Instability & Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, 4150-180 Porto, Portugal Cell Division Unit, Department of Experimental Biology, Faculdade de Medicina, Universidade do Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.
Nisha PawarExperimental Physics I, University of Bayreuth, D-95440 Bayreuth, Germany.
Matthias WeissExperimental Physics I, University of Bayreuth, D-95440 Bayreuth, Germany.
Helder MaiatoChromosome Instability & Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, 4150-180 Porto, Portugal Cell Division Unit, Department of Experimental Biology, Faculdade de Medicina, Universidade do Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal maiato@ibmc.up.pt.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The mitotic spindle is a microtubular assembly required for chromosome segregation during mitosis. Additionally, a spindle matrix has long been proposed to assist this process, but its nature has remained elusive. By combining live-cell imaging with laser microsurgery, fluorescence recovery after photobleaching, and fluorescence correlation spectroscopy in Drosophila melanogaster S2 cells, we uncovered a microtubule-independent mechanism that underlies the accumulation of molecules in the spindle region. This mechanism relies on a membranous system surrounding the mitotic spindle that defines an organelle-exclusion zone that is conserved in human cells. Supported by mathematical modeling, we demonstrate that organelle exclusion by a membrane system causes spatio-temporal differences in molecular crowding states that are sufficient to drive accumulation of mitotic regulators, such as Mad2 and Megator/Tpr, as well as soluble tubulin, in the spindle region. This membranous "spindle envelope" confined spindle assembly, and its mechanical disruption compromised faithful chromosome segregation. Thus, cytoplasmic compartmentalization persists during early mitosis to promote spindle assembly and function.

Indexed as

AnimalsCell LineCell MembraneDrosophila melanogasterDrosophila ProteinsEndoplasmic ReticulumGreen Fluorescent ProteinsHeLa CellsHumansMad2 ProteinsMicrotubulesMitosisNuclear EnvelopeNuclear Matrix-Associated ProteinsOptical ImagingOrganellesDrosophila ProteinsGreen Fluorescent ProteinsMad2 protein, DrosophilaMad2 ProteinsMtor protein, DrosophilaNuclear Matrix-Associated ProteinsTubulin

Identifiers

PMID26304726
PMCPMC4555823

What OpenQuestion holds

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Registered trials

None linked

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.