Evidence map›Paper›PMID 20826218›Full record

ArticleJournal of structural biology2011

Cryo transmission X-ray imaging of the malaria parasite, P. falciparum.

Eric Hanssen, Christian Knoechel, Nectarios Klonis, Nurhidanatasha Abu-Bakar, Samantha Deed, Mark LeGros, Carolyn Larabell, Leann Tilley

Abstract read
In one paragraph

Article in Journal of structural biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.6field-weighted citation impact, top 4% 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

23 citing papers in PubMed, 64 citations in OpenAlex.

  1. Article
  2. Biophysical Tools and Concepts Enable Understanding of Asexual Blood Stage Malaria.Frontiers in cellular and infection microbiology · 2022
    Review
  3. Review
  4. Article
  5. Review
  6. Article
  7. Imaging cell morphology and physiology using X-rays.Biochemical Society transactions · 2019
    Review
  8. Article
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Oriented nucleation of hemozoin at the digestive vacuole membrane in Plasmodium falciparum.Proceedings of the National Academy of Sciences of the United States of America · 2012
    Article
  15. Article
  16. Article
  17. Visualizing and quantifying cell phenotype using soft X-ray tomography.BioEssays : news and reviews in molecular, cellular and developmental biology · 2012
    Review
  18. Article
  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

8 authors at 4 institutions in 2 countries.

Eric HanssenElectron Microscopy Unit Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, VIC 3010, Australia. ehanssen@unimelb.edu.au
Christian Knoechel
Nectarios Klonis
Nurhidanatasha Abu-Bakar
Samantha Deed
Mark LeGros
Carolyn Larabell
Leann Tilley
ARC Centre of Excellence for Coherent X-ray Science · AULa Trobe University · AULawrence Berkeley National Laboratory · USUniversity of California, San Francisco · US

Funding

VIRUS-INDUCED STRUCTURAL ALTERATIONS OF NUCLEUSP41RR019664 · NCRR · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI THORNER, JEREMY W. · 2004 to 2011
$8.2M
3D Cryo X ray Microscopy of Whole CellsR01GM063948 · NIGMS · UNIVERSITY OF CALIF-LAWRENC BERKELEY LAB · PI LARABELL, CAROLYN A · 2001 to 2005
$1.3M
NCRR NIH HHS P41 RR019664NCRR NIH HHS P41RR019664NIGMS NIH HHS GM63948NIGMS NIH HHS R01 GM063948
6 · The paper itself

Abstract

Cryo transmission X-ray microscopy in the "water window" of photon energies has recently been introduced as a method that exploits the natural contrast of biological samples. We have used cryo tomographic X-ray imaging of the intra-erythrocytic malaria parasite, Plasmodium falciparum, to undertake a survey of the cellular features of this important human pathogen. We examined whole hydrated cells at different stages of growth and defined some of the structures with different X-ray density, including the parasite nucleus, cytoplasm, digestive vacuole and the hemoglobin degradation product, hemozoin. As the parasite develops from an early cup-shaped morphology to a more rounded shape, puncta of hemozoin are formed; these coalesce in the mature trophozoite into a central compartment. In some trophozoite stage parasites we observed invaginations of the parasite surface and, using a selective permeabilization process, showed that these remain connected to the RBC cytoplasm. Some of these invaginations have large openings consistent with phagocytic structures and we observed independent endocytic vesicles in the parasite cytoplasm which appear to play a role in hemoglobin uptake. In schizont stage parasites staggered mitosis was observed and X-ray-dense lipid-rich structures were evident at their apical ends of the developing daughter cells. Treatment of parasites with the antimalarial drug artemisinin appears to affect parasite development and their ability to produce the hemoglobin breakdown product, hemozoin.

Indexed as

ArtemisininsCryoelectron MicroscopyErythrocytesImmunohistochemistryPlasmodium falciparumTomography, X-RayartemisininArtemisinins

Identifiers

PMID20826218
PMCPMC3005799
OpenAlexW1991359669

What OpenQuestion holds

Textmetadata
LicenceTDM
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.