Evidence map›Paper›PMID 25881248›Full record

ArticleBMC developmental biology2015

An automated system for quantitative analysis of Drosophila larval locomotion.

Boanerges Aleman-Meza, Sang-Kyu Jung, Weiwei Zhong

Abstract read
In one paragraph

Article in BMC developmental biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed.

  1. Article
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  4. Review
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  7. IntacteLife · 2022
    Article
  8. Article
  9. Loss of theDisease models & mechanisms · 2020
    Article
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  11. Article
  12. Article
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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.

Boanerges Aleman-MezaDepartment of BioSciences, Rice University, Houston, TX, USA. ba8@rice.edu.
Sang-Kyu JungDepartment of BioSciences, Rice University, Houston, TX, USA. sj26@rice.edu.
Weiwei ZhongDepartment of BioSciences, Rice University, Houston, TX, USA. weiwei.zhong@rice.edu.

Funding

Machine Vision Analysis of C. Elegans Phenotypic PatternsR01DA018341 · NIDA · UNIVERSITY OF CALIFORNIA SAN DIEGO · PI SCHAFER, WILLIAM R, STERNBERG, PAUL WARREN · 2005 to 2014
$3.4M
Quantitiative Genetic Interaction Mapping of Disease Genes in C elegansR00HG004724 · NHGRI · RICE UNIVERSITY · PI ZHONG, WEIWEI · 2009 to 2011
$747k
Quantitiative Genetic Interaction Mapping of Disease Genes in C elegansK99HG004724 · NHGRI · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI ZHONG, WEIWEI · 2008 to 2008
$89k
NHGRI NIH HHS HG004724NHGRI NIH HHS K99 HG004724NHGRI NIH HHS R00 HG004724NIDA NIH HHS DA018341NIDA NIH HHS R01 DA018341
6 · The paper itself

Abstract

backgroundDrosophila larvae have been used as a model to study to genetic and cellular circuitries modulating behaviors. One of the challenges in behavioral study is the quantification of complex phenotypes such as locomotive behaviors. Experimental capability can be greatly enhanced by an automatic single-animal tracker that records an animal at a high resolution for an extended period, and analyzes multiple behavioral parameters.

resultsHere we present MaggotTracker, a single-animal tracking system for Drosophila larval locomotion analysis. This system controls the motorized microscope stage while taking a video, so that the animal remains in the viewing center. It then reduces the animal to 13 evenly distributed points along the midline, and computes over 20 parameters evaluating the shape, peristalsis movement, stamina, and track of the animal. To demonstrate its utility, we applied MaggotTracker to analyze both wild-type and mutant animals to identify factors affecting locomotive behaviors. Each animal was tracked for four minutes. Our analysis on Canton-S third-instar larvae revealed that the distance an animal travelled was correlated to its striding speed rather than the percentage of time the animal spent striding, and that the striding speed was correlated to both the distance and the duration of one stride. Sexual dimorphism was observed in body length but not in locomotive parameters such as speed. Locomotive parameters were affected by animal developmental stage and the crawling surface. No significant changes in movement speed were detected in mutants of circadian genes such as period (per), timeout, and timeless (tim). The MaggotTracker analysis showed that ether a go-go (eag), Shaker (Sh), slowpoke (slo), and dunce (dnc) mutant larvae had severe phenotypes in multiple locomotive parameters such as stride distance and speed, consistent with their function in neuromuscular junctions. Further, the phenotypic patterns of the K(+) channel genes eag, Sh and slo are highly similar.

conclusionsThese results showed that MaggotTracker is an efficient tool for automatic phenotyping. The MaggotTracker software as well as the data presented here can be downloaded from our open-access site www.WormLoco.org/Mag.

Indexed as

AutomationLocomotionAnimalsDrosophilaLarvaSoftware

Identifiers

PMID25881248
PMCPMC4345013

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LicenceCC BY
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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.