Evidence map›Paper›PMID 22352722›Full record

Trial reportBritish journal of haematology2012

Transfer of 4-hydroxynonenal from parasitized to non-parasitized erythrocytes in rosettes. Proposed role in severe malaria anemia.

Sophie Uyoga, Oleksii A Skorokhod, Michael Opiyo, Emily N Orori, Thomas N Williams, Paolo Arese, Evelin Schwarzer

Open access · bronzeAbstract readClinical Trial
In one paragraph

Trial report in British journal of haematology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
6.6field-weighted citation impact, top 3% 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

20 citing papers in PubMed, 37 citations in OpenAlex.

  1. Trial
  2. Review
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Immune Escape Strategies of Malaria Parasites.Frontiers in microbiology · 2016
    Review
  13. Article
  14. Review
  15. Review
  16. Article
  17. Review
  18. Hemozoin inhibition and control of clinical malaria.Advances in pharmacological sciences · 2014
    Review
  19. Article
  20. Pathogenesis of malaria in tissues and blood.Mediterranean journal of hematology and infectious diseases · 2012
    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

7 authors at 2 institutions in 3 countries.

Sophie UyogaDepartment of Genetics, Biology and Biochemistry, University of Torino Medical School, Turin, Italy.
Oleksii A Skorokhod
Michael Opiyo
Emily N Orori
Thomas N Williams
Paolo Arese
Evelin Schwarzer
Kenya Medical Research Institute · KEUniversity of Turin · IT

Funding

Wellcome Trust 076934Wellcome Trust 091758Wellcome Trust 092654
6 · The paper itself

Abstract

Severe anaemia is a life-threatening complication of falciparum malaria associated with loss of predominantly non-parasitized red blood cells (npRBCs). This poorly elucidated process might be influenced by (i) rosettes, i.e. npRBCs cytoadherent to haemozoin-containing parasitized RBCs (pRBCs) and (ii) generation in pRBCs of 4-hydroxynonenal (4-HNE) through haemozoin-catalysed lipid peroxidation. We explored whether close proximity in rosettes may facilitate 4-HNE transfer to npRBCs, which is likely to enhance their phagocytosis and contribute to malaria anaemia. Fluorescence microscopy and flow cytometry data indicated 4-HNE transfer to npRBCs in rosettes. Rosettes were formed by 64·8 ± 1·8% varO-expressing pRBCs, and 8·7 ± 1·1% npRBCs were positive for 4-HNE-protein-conjugates, while low-rosetting parasites generated only 2·4 ± 1·1% 4-HNE-conjugate-positive npRBCs. 4-HNE transfer decreased after blocking rosetting by monoclonal antibodies. A positive linear relationship between rosette frequency and 4-HNE-conjugates in npRBCs was found in 40 malaria patients, a first indication for a role of rosetting in npRBCs modifications in vivo. Children with severe malaria anaemia had significantly higher percentages of 4-HNE-conjugate-positive npRBCs compared to children with uncomplicated malaria. In conclusion, 4-HNE transfer from pRBCs to npRBCs in rosettes is suggested to play a role in the phagocytic removal of large numbers of npRBCs, the hallmark of severe malaria anaemia.

Indexed as

ErythrocytesAldehydesAnemiaBiological TransportCell LineChildChild, PreschoolFemaleHemeproteinsHumansInfantLipid PeroxidationMalaria, FalciparumMalePlasmodium falciparum4-hydroxy-2-nonenalAldehydesHemeproteinshemozoin

Identifiers

PMID22352722
PMCPMC3412292
OpenAlexW1578525512

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.