Evidence map›Paper›PMID 26811445›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2016

Cryptochrome 2 mediates directional magnetoreception in cockroaches.

Olga Bazalova, Marketa Kvicalova, Tereza Valkova, Pavel Slaby, Premysl Bartos, Radek Netusil, Katerina Tomanova, Peter Braeunig, How-Jing Lee, Ivo Sauman and 5 more

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed, 2 pooled it
24.7field-weighted citation impact, top 1% 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

52 citing papers in PubMed, 2 syntheses or guidelines pooled it, 114 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. From skylight cues to magnetic fields: the toolkit of insect long-distance navigation.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2026
    Review
  5. Article
  6. Article
  7. Coevolution ofiScience · 2025
    Article
  8. Article
  9. Article
  10. Clock Gene Expression in Eel Retina and Hypothalamus: Response to Photoperiod and Moonlight.Journal of experimental zoology. Part A, Ecological and integrative physiology · 2025
    Article
  11. Article
  12. Article
  13. Review
  14. Review
  15. Insect magnetoreception: a Cry for mechanistic insights.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2023
    Review
  16. Article
  17. Probing Transcriptional Crosstalk betweenInternational journal of molecular sciences · 2023
    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

15 authors at 6 institutions in 3 countries.

Olga BazalovaInstitute of Entomology, Biology Centre of Academy of Sciences of the Czech Republic, 370 05, Ceske Budejovice, Czech Republic; Department of Molecular Biology, Faculty of Science, University of South Bohemia, 370 05, Ceske Budejovice, Czech Republic;
Marketa KvicalovaDepartment of Animal Physiology and Immunology, Faculty of Science, Masaryk University, 611 37, Brno, Czech Republic;
Tereza ValkovaDepartment of Animal Physiology and Immunology, Faculty of Science, Masaryk University, 611 37, Brno, Czech Republic;
Pavel SlabyDepartment of Animal Physiology and Immunology, Faculty of Science, Masaryk University, 611 37, Brno, Czech Republic;
Premysl BartosDepartment of Animal Physiology and Immunology, Faculty of Science, Masaryk University, 611 37, Brno, Czech Republic;
Radek NetusilDepartment of Animal Physiology and Immunology, Faculty of Science, Masaryk University, 611 37, Brno, Czech Republic;
Katerina TomanovaDepartment of Animal Physiology and Immunology, Faculty of Science, Masaryk University, 611 37, Brno, Czech Republic;
Peter BraeunigDepartment of Zoology and Animal Physiology, Institute for Biology II, RWTH Aachen University, D-52056, Aachen, Germany;
How-Jing LeeDepartment of Entomology, National Taiwan University, Taipei 106, Taiwan;
Ivo SaumanInstitute of Entomology, Biology Centre of Academy of Sciences of the Czech Republic, 370 05, Ceske Budejovice, Czech Republic; Department of Molecular Biology, Faculty of Science, University of South Bohemia, 370 05, Ceske Budejovice, Czech Republic;
Milena DamulewiczInstitute of Entomology, Biology Centre of Academy of Sciences of the Czech Republic, 370 05, Ceske Budejovice, Czech Republic;
Jan ProvaznikInstitute of Entomology, Biology Centre of Academy of Sciences of the Czech Republic, 370 05, Ceske Budejovice, Czech Republic; Department of Molecular Biology, Faculty of Science, University of South Bohemia, 370 05, Ceske Budejovice, Czech Republic;
Richard PokornyDepartment of Plant Physiology and Photobiology, Faculty of Biology, Philipps-University, D-35032 Marburg, Germany david.dolezel@entu.cas.cz pokorny@staff.uni-marburg.de vacha@sci.muni.cz.
David DolezelInstitute of Entomology, Biology Centre of Academy of Sciences of the Czech Republic, 370 05, Ceske Budejovice, Czech Republic; Department of Molecular Biology, Faculty of Science, University of South Bohemia, 370 05, Ceske Budejovice, Czech Republic; david.dolezel@entu.cas.cz pokorny@staff.uni-marburg.de vacha@sci.muni.cz.
Martin VachaDepartment of Animal Physiology and Immunology, Faculty of Science, Masaryk University, 611 37, Brno, Czech Republic; david.dolezel@entu.cas.cz pokorny@staff.uni-marburg.de vacha@sci.muni.cz.
Masaryk University · CZInstitute of Entomology · CZCzech Academy of Sciences, Biology Centre · CZNational Taiwan University · TWPhilipps University of Marburg · DERWTH Aachen University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The ability to perceive geomagnetic fields (GMFs) represents a fascinating biological phenomenon. Studies on transgenic flies have provided evidence that photosensitive Cryptochromes (Cry) are involved in the response to magnetic fields (MFs). However, none of the studies tackled the problem of whether the Cry-dependent magnetosensitivity is coupled to the sole MF presence or to the direction of MF vector. In this study, we used gene silencing and a directional MF to show that mammalian-like Cry2 is necessary for a genuine directional response to periodic rotations of the GMF vector in two insect species. Longer wavelengths of light required higher photon fluxes for a detectable behavioral response, and a sharp detection border was present in the cyan/green spectral region. Both observations are consistent with involvement of the FADox, FAD(•-) and FADH(-) redox forms of flavin. The response was lost upon covering the eyes, demonstrating that the signal is perceived in the eye region. Immunohistochemical staining detected Cry2 in the hemispherical layer of laminal glia cells underneath the retina. Together, these findings identified the eye-localized Cry2 as an indispensable component and a likely photoreceptor of the directional GMF response. Our study is thus a clear step forward in deciphering the in vivo effects of GMF and supports the interaction of underlying mechanism with the visual system.

Indexed as

Magnetic FieldsAnimalsCockroachesCompound Eye, ArthropodCryptochromesPhenotypePhotoreceptor Cells, InvertebrateUltraviolet RaysCryptochromescircadian genescryptochromelight spectrumlocomotor activitymagnetoreception

Identifiers

PMID26811445
PMCPMC4760799
OpenAlexW2257737743

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.