Evidence map›Paper›PMID 33479150›Full record

ArticleScience (New York, N.Y.)2021

Convergent evolution of pain-inducing defensive venom components in spitting cobras.

T D Kazandjian, D Petras, S D Robinson, J van Thiel, H W Greene, K Arbuckle, A Barlow, D A Carter, R M Wouters, G Whiteley and 19 more

Registry-linked trialOpen access · greenAbstract read
In one paragraph

Article in Science (New York, N.Y.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04996264 (Randomized, Double-Blinded, Placebo-Controlled Study to Evaluate the Safety, Tolerability, and Efficacy of a Multi-Dose Regimen of Oral Varespladib-Methyl in Subjects Bitten by Venomous Snakes), which is not on this map. Cited by 88 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed, 1 pooled it
22.2field-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.

NCT04996264 phase2completednot on this map

Randomized, Double-Blinded, Placebo-Controlled Study to Evaluate the Safety, Tolerability, and Efficacy of a Multi-Dose Regimen of Oral Varespladib-Methyl in Subjects Bitten by Venomous Snakes

TypeinterventionalSponsorOphirex, Inc.Ran2021 to 2023Enrolled95ConditionsSnakebites, Envenoming, Envenoming, Snake, Envenomation, SnakeArmsVarespladib Methyl, Placebo, Standard of care (SOC)
3 · Its place in the literature

Who cites it

88 citing papers in PubMed, 1 synthesis or guideline pooled it, 162 citations in OpenAlex.

  1. Pooled it
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  16. Why Are Some Snakes More Terrifying and What Is Behind the Fear?Animals : an open access journal from MDPI · 2025
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28 more citing papers are in PubMed but not listed here.

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

29 authors at 12 institutions in 8 countries.

T D Kazandjian *Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.ORCID https://orcid.org/0000-0002-5383-0505
D Petras *Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA.ORCID https://orcid.org/0000-0002-6561-3022
S D Robinson *Centre for Advanced Imaging, University of Queensland, St Lucia, QLD 4072, Australia.ORCID https://orcid.org/0000-0002-3518-0377
J van ThielInstitute of Biology, University of Leiden, Leiden 2333BE, Netherlands.ORCID https://orcid.org/0000-0002-5187-7342
H W GreeneDepartment of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA.ORCID https://orcid.org/0000-0002-2160-9355
K ArbuckleDepartment of Biosciences, College of Science, Swansea University, Swansea SA2 8PP, UK.ORCID https://orcid.org/0000-0002-9171-5874
A BarlowSchool of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK.
D A CarterInstitute for Molecular Bioscience, University of Queensland, St Lucia, QLD 4072, Australia.ORCID https://orcid.org/0000-0003-4562-3888
R M WoutersInstitute of Biology, University of Leiden, Leiden 2333BE, Netherlands.ORCID https://orcid.org/0000-0002-2320-3412
G WhiteleyCentre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.
S C WagstaffCentre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.ORCID https://orcid.org/0000-0003-0577-5537
A S AriasInstituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501, Costa Rica.ORCID https://orcid.org/0000-0002-5519-0599
L-O AlbulescuCentre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.ORCID https://orcid.org/0000-0001-6563-9217
A Plettenberg LaingMolecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK.ORCID https://orcid.org/0000-0002-2231-7274
C HallMolecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK.ORCID https://orcid.org/0000-0001-7226-189X
A HeapMolecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK.ORCID https://orcid.org/0000-0002-3031-2000
S Penrhyn-LoweMolecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK.ORCID https://orcid.org/0000-0003-4621-3872
C V McCabeSchool of Earth Sciences, University of Bristol, Bristol BS8 1RL, UK.
S AinsworthCentre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.ORCID https://orcid.org/0000-0002-0199-6482
R R da SilvaCollaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA.ORCID https://orcid.org/0000-0001-6378-0479
P C DorresteinCollaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA.ORCID https://orcid.org/0000-0002-3003-1030
M K RichardsonInstitute of Biology, University of Leiden, Leiden 2333BE, Netherlands.ORCID https://orcid.org/0000-0003-1222-8101
J M GutiérrezInstituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501, Costa Rica.ORCID https://orcid.org/0000-0001-8385-3081
J J CalveteEvolutionary and Translational Venomics Laboratory, Consejo Superior de Investigaciones Científicas, 46010 Valencia, Spain.ORCID https://orcid.org/0000-0001-5026-3122
R A HarrisonCentre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.ORCID https://orcid.org/0000-0001-9842-5573
I VetterInstitute for Molecular Bioscience, University of Queensland, St Lucia, QLD 4072, Australia.ORCID https://orcid.org/0000-0002-3594-9588
E A B UndheimCentre for Advanced Imaging, University of Queensland, St Lucia, QLD 4072, Australia.ORCID https://orcid.org/0000-0002-8667-3999
W WüsterMolecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK.ORCID https://orcid.org/0000-0002-4890-4311
N R CasewellCentre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK. nicholas.casewell@lstmed.ac.uk.ORCID https://orcid.org/0000-0002-8035-4719
Liverpool School of Tropical Medicine · GBBangor University · GBThe University of Queensland · AULeiden University · NLUniversidad de Costa Rica · CRConsejo Superior de Investigaciones Científicas · ESCornell University · USScripps Institution of Oceanography · USSwansea University · GBUniversidade de São Paulo · BRUniversity of Bristol · GBUniversity of California San Diego · US

Funding

Medical Research Council MR/L01839X/1Wellcome Trust 200517Wellcome Trust 200517/Z/16/Z
6 · The paper itself

Abstract

Convergent evolution provides insights into the selective drivers underlying evolutionary change. Snake venoms, with a direct genetic basis and clearly defined functional phenotype, provide a model system for exploring the repeated evolution of adaptations. While snakes use venom primarily for predation, and venom composition often reflects diet specificity, three lineages of cobras have independently evolved the ability to spit venom at adversaries. Using gene, protein, and functional analyses, we show that the three spitting lineages possess venoms characterized by an up-regulation of phospholipase A

Indexed as

Evolution, MolecularPainAdaptation, BiologicalAnimalsElapidaeElapid VenomsGroup IV Phospholipases A2PhylogenySensory Receptor CellsElapid VenomsGroup IV Phospholipases A2

Identifiers

PMID33479150
PMCPMC7610493
OpenAlexW3125238661

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Registered trials

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.