Evidence map›Paper›PMID 19880745›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2009

Propulsion of African trypanosomes is driven by bihelical waves with alternating chirality separated by kinks.

Jose A Rodríguez, Miguel A Lopez, Michelle C Thayer, Yunzhe Zhao, Michael Oberholzer, Donald D Chang, Neville K Kisalu, Manuel L Penichet, Gustavo Helguera, Robijn Bruinsma and 2 more

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing 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

45 citing papers in PubMed.

  1. Article
  2. CryoEM structure of thebioRxiv : the preprint server for biology · 2025
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
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  11. Rotation and propulsion in 3D active chiral droplets.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  12. Article
  13. Article
  14. Flagellum couples cell shape to motility inProceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Bimodal rheotactic behavior reflects flagellar beat asymmetry in human sperm cells.Proceedings of the National Academy of Sciences of the United States of America · 2015
    Article
  20. Electric-field-induced assembly and propulsion of chiral colloidal clusters.Proceedings of the National Academy of Sciences of the United States of America · 2015
    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

12 authors.

Jose A RodríguezDepartment of Surgery, Division of Surgical Oncology, Molecular Biology Institute, The David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA.
Miguel A Lopez
Michelle C Thayer
Yunzhe Zhao
Michael Oberholzer
Donald D Chang
Neville K Kisalu
Manuel L Penichet
Gustavo Helguera
Robijn Bruinsma
Kent L Hill
Jianwei Miao

Funding

UCLA NIGMS T32 Program AssessmentT32GM007185 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI TORRES, JORGE · 1985 to 2020
$21.7M
Biochemical and Functional Analysis of TrypaninR01AI052348 · NIAID · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI HILL, KENT L · 2002 to 2023
$7.4M
Biochemical and Functional Analysis of TrypaninR56AI052348 · NIAID · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI HILL, KENT L · 2007 to 2007
$374k
Howard Hughes Medical InstituteNIAID NIH HHS AI052348NIAID NIH HHS R01 AI052348NIAID NIH HHS R56 AI052348NIGMS NIH HHS GM07185NIGMS NIH HHS T32 GM007185
6 · The paper itself

Abstract

Trypanosoma brucei, a parasitic protist with a single flagellum, is the causative agent of African sleeping sickness. Propulsion of T. brucei was long believed to be by a drill-like, helical motion. Using millisecond differential interference-contrast microscopy and analyzing image sequences of cultured procyclic-form and bloodstream-form parasites, as well as bloodstream-form cells in infected mouse blood, we find that, instead, motility of T. brucei is by the propagation of kinks, separating left-handed and right-handed helical waves. Kink-driven motility, previously encountered in prokaryotes, permits T. brucei a helical propagation mechanism while avoiding the large viscous drag associated with a net rotation of the broad end of its tapering body. Our study demonstrates that millisecond differential interference-contrast microscopy can be a useful tool for uncovering important short-time features of microorganism locomotion.

Indexed as

Cell MovementAnimalsCells, CulturedFlagellaMiceMice, Inbred BALB CMicroscopyTrypanosoma brucei bruceiTrypanosomiasis, African

Identifiers

PMID19880745
PMCPMC2780783

What OpenQuestion holds

Textmetadata
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.