Evidence map›Paper›PMID 25992908›Full record

ArticlePloS one2015

Describing directional cell migration with a characteristic directionality time.

Alex J Loosley, Xian M O'Brien, Jonathan S Reichner, Jay X Tang

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
0.8field-weighted citation impact, top 31% of its field
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

22 citing papers in PubMed, 34 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Reduced cell-substrate adhesion formation promotes cell migration inbioRxiv : the preprint server for biology · 2025
    Article
  5. Article
  6. Article
  7. Thermotaxis in an apolar, non-neuronal animal.Journal of the Royal Society, Interface · 2023
    Article
  8. The weakness of senescent dermal fibroblasts.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  9. Article
  10. Article
  11. Article
  12. Quantification of cell migration: metrics selection to model application.Frontiers in cell and developmental biology · 2023
    Review
  13. Article
  14. Article
  15. Frontiers in immunology · 2021
    Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. An automated quantitative image analysis pipeline ofJournal of biological methods · 2018
    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

4 authors at 2 institutions in 1 country.

Alex J LoosleyDepartment of Physics, Brown University, Providence, RI, USA.
Xian M O'BrienDivision of Surgical Research, Department of Surgery, Rhode Island Hospital and the Warren Alpert Medical School of Brown University, Providence, RI, USA.
Jonathan S ReichnerDivision of Surgical Research, Department of Surgery, Rhode Island Hospital and the Warren Alpert Medical School of Brown University, Providence, RI, USA.
Jay X TangDepartment of Physics, Brown University, Providence, RI, USA.
Brown University · USRhode Island Hospital · US

Funding

Effect of Neutrophil Priming on Chemotaxis and SignalingR01GM066194 · NIGMS · RHODE ISLAND HOSPITAL (PROVIDENCE, RI) · PI REICHNER, JONATHAN S · 2003 to 2011
$2.4M
Neutrophil MechanosensingR21AI079582 · NIAID · RHODE ISLAND HOSPITAL · PI REICHNER, JONATHAN S · 2008 to 2009
$427k
Effect of Neutrophil Priming on Chemotaxis and SignalingR56GM066194 · NIGMS · RHODE ISLAND HOSPITAL · PI REICHNER, JONATHAN S · 2007 to 2007
$254k
NIAID NIH HHS AI-079582NIAID NIH HHS R21 AI079582NIGMS NIH HHS GM-066194NIGMS NIH HHS R01 GM066194NIGMS NIH HHS R56 GM066194
6 · The paper itself

Abstract

Many cell types can bias their direction of locomotion by coupling to external cues. Characteristics such as how fast a cell migrates and the directedness of its migration path can be quantified to provide metrics that determine which biochemical and biomechanical factors affect directional cell migration, and by how much. To be useful, these metrics must be reproducible from one experimental setting to another. However, most are not reproducible because their numerical values depend on technical parameters like sampling interval and measurement error. To address the need for a reproducible metric, we analytically derive a metric called directionality time, the minimum observation time required to identify motion as directionally biased. We show that the corresponding fit function is applicable to a variety of ergodic, directionally biased motions. A motion is ergodic when the underlying dynamical properties such as speed or directional bias do not change over time. Measuring the directionality of nonergodic motion is less straightforward but we also show how this class of motion can be analyzed. Simulations are used to show the robustness of directionality time measurements and its decoupling from measurement errors. As a practical example, we demonstrate the measurement of directionality time, step-by-step, on noisy, nonergodic trajectories of chemotactic neutrophils. Because of its inherent generality, directionality time ought to be useful for characterizing a broad range of motions including intracellular transport, cell motility, and animal migration.

Indexed as

Cell MovementHumansModels, BiologicalNeutrophilsTime Factors

Identifiers

PMID25992908
PMCPMC4439174
OpenAlexW1504726947

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.