Evidence map›Paper›PMID 26703723›Full record

ArticleToxins2015

Characterization of Ricin and R. communis Agglutinin Reference Materials.

Sylvia Worbs, Martin Skiba, Martin Söderström, Marja-Leena Rapinoja, Reinhard Zeleny, Heiko Russmann, Heinz Schimmel, Paula Vanninen, Sten-Åke Fredriksson, Brigitte G Dorner

Abstract read
In one paragraph

Article in Toxins, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing 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

31 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Toxins · 2025
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Review
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

10 authors.

Sylvia WorbsBiological Toxins, Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany. worbss@rki.de.
Martin SkibaBiological Toxins, Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany. skibam@rki.de.
Martin SöderströmVERIFIN (Finnish Institute for Verification of the ChemicalWeapons Convention), Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, Helsinki 05600, Finland. martin.soderstrom@helsinki.fi.
Marja-Leena RapinojaVERIFIN (Finnish Institute for Verification of the ChemicalWeapons Convention), Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, Helsinki 05600, Finland. marja-leena.rapinoja@helsinki.fi.
Reinhard ZelenyEuropean Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, 2440 Geel, Belgium. reinhard.zeleny@ec.europa.eu.
Heiko RussmannBundeswehr Research Institute for Protective Technologies and NBC Protection, Humboldtstr. 100, 29633 Munster, Germany. heikorussmann@bundeswehr.org.
Heinz SchimmelEuropean Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, 2440 Geel, Belgium. heinz.schimmel@ec.europa.eu.
Paula VanninenVERIFIN (Finnish Institute for Verification of the ChemicalWeapons Convention), Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, Helsinki 05600, Finland. paula.vanninen@helsinki.fi.
Sten-Åke FredrikssonFOI, Swedish Defence Research Agency, CBRN Defence and Security, Cementvagen 20, 901 82 Umeå, Sweden. sten-ake.fredriksson@foi.se.
Brigitte G DornerBiological Toxins, Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany. DornerB@rki.de.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Ricinus communis intoxications have been known for centuries and were attributed to the toxic protein ricin. Due to its toxicity, availability, ease of preparation, and the lack of medical countermeasures, ricin attracted interest as a potential biological warfare agent. While different technologies for ricin analysis have been established, hardly any universally agreed-upon "gold standards" are available. Expert laboratories currently use differently purified in-house materials, making any comparison of accuracy and sensitivity of different methods nearly impossible. Technically challenging is the discrimination of ricin from R. communis agglutinin (RCA120), a less toxic but highly homologous protein also contained in R. communis. Here, we established both highly pure ricin and RCA120 reference materials which were extensively characterized by gel electrophoresis, liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI MS/MS), and matrix-assisted laser desorption ionization-time of flight approaches as well as immunological and functional techniques. Purity reached >97% for ricin and >99% for RCA120. Different isoforms of ricin and RCA120 were identified unambiguously and distinguished by LC-ESI MS/MS. In terms of function, a real-time cytotoxicity assay showed that ricin is approximately 300-fold more toxic than RCA120. The highly pure ricin and RCA120 reference materials were used to conduct an international proficiency test.

Indexed as

Amino Acid SequenceAnimalsAntibodiesCell SurvivalChlorocebus aethiopsChromatography, LiquidEnzyme-Linked Immunosorbent AssayLaboratory Proficiency TestingPlant LectinsReference StandardsRicinRicinus communisSeedsSpectrometry, Mass, Electrospray IonizationSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationTandem Mass SpectrometryAntibodiesPlant LectinsRicinRicinus communis agglutinin-1proficiency testreference materialricin

Identifiers

PMID26703723
PMCPMC4690106

What OpenQuestion holds

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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.