Evidence map›Paper›PMID 25089527›Full record

ArticlePloS one2014

Engineering neprilysin activity and specificity to create a novel therapeutic for Alzheimer's disease.

Carl I Webster, Matthew Burrell, Lise-Lotte Olsson, Susan B Fowler, Sarah Digby, Alan Sandercock, Arjan Snijder, Jan Tebbe, Ulrich Haupts, Joanna Grudzinska and 2 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing 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

26 citing papers in PubMed, 72 citations in OpenAlex.

  1. Trial
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  8. Review
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  10. Review
  11. Review
  12. Observational
  13. Article
  14. Structures of soluble rabbit neprilysin complexed with phosphoramidon or thiorphan.Acta crystallographica. Section F, Structural biology communications · 2019
    Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Is Entresto good for the brain?World journal of cardiology · 2017
    Review
  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

12 authors at 3 institutions in 3 countries.

Carl I WebsterAntibody Discovery and Protein Engineering, MedImmune, Cambridge, United Kingdom.
Matthew BurrellAntibody Discovery and Protein Engineering, MedImmune, Cambridge, United Kingdom.
Lise-Lotte OlssonDiscovery Sciences, AstraZeneca R & D, Mölndal, Sweden.
Susan B FowlerAntibody Discovery and Protein Engineering, MedImmune, Cambridge, United Kingdom.
Sarah DigbyAntibody Discovery and Protein Engineering, MedImmune, Cambridge, United Kingdom.
Alan SandercockAntibody Discovery and Protein Engineering, MedImmune, Cambridge, United Kingdom.
Arjan SnijderDiscovery Sciences, AstraZeneca R & D, Mölndal, Sweden.
Jan TebbeGlobal Drug Discovery, Global Biologics, Bayer HealthCare AG, Cologne, Germany.
Ulrich HauptsGlobal Drug Discovery, Global Biologics, Bayer HealthCare AG, Cologne, Germany.
Joanna GrudzinskaGlobal Drug Discovery, Global Biologics, Bayer HealthCare AG, Cologne, Germany.
Lutz JermutusAntibody Discovery and Protein Engineering, MedImmune, Cambridge, United Kingdom.
Christin AnderssonCNS&P iMed, AstraZeneca R & D, Södertälje, Sweden.
Recombinant Antibody Technology (United Kingdom) · GBAstraZeneca (Sweden) · SEBayer (Germany) · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Neprilysin is a transmembrane zinc metallopeptidase that degrades a wide range of peptide substrates. It has received attention as a potential therapy for Alzheimer's disease due to its ability to degrade the peptide amyloid beta. However, its broad range of peptide substrates has the potential to limit its therapeutic use due to degradation of additional peptides substrates that tightly regulate many physiological processes. We sought to generate a soluble version of the ectodomain of neprilysin with improved activity and specificity towards amyloid beta as a potential therapeutic for Alzheimer's disease. Extensive amino acid substitutions were performed at positions surrounding the active site and inner surface of the enzyme and variants screened for activity on amyloid beta 1-40, 1-42 and a variety of other physiologically relevant peptides. We identified several mutations that modulated and improved both enzyme selectivity and intrinsic activity. Neprilysin variant G399V/G714K displayed an approximately 20-fold improved activity on amyloid beta 1-40 and up to a 3,200-fold reduction in activity on other peptides. Along with the altered peptide substrate specificity, the mutant enzyme produced a markedly altered series of amyloid beta cleavage products compared to the wild-type enzyme. Crystallisation of the mutant enzyme revealed that the amino acid substitutions result in alteration of the shape and size of the pocket containing the active site compared to the wild-type enzyme. The mutant enzyme offers the potential for the more efficient degradation of amyloid beta in vivo as a therapeutic for the treatment of Alzheimer's disease.

Indexed as

Protein EngineeringAlzheimer DiseaseAmino Acid SequenceAmino Acid SubstitutionAmyloid beta-PeptidesGene ExpressionHumansModels, MolecularMolecular Sequence DataMutationNeprilysinPeptide FragmentsPeptidesProtein Structure, TertiaryProteolysisRecombinant ProteinsAmyloid beta-Peptidesamyloid beta-protein (1-40)amyloid beta-protein (1-42)NeprilysinPeptide FragmentsPeptidesRecombinant Proteins

Identifiers

PMID25089527
PMCPMC4121237
OpenAlexW2059622139

What OpenQuestion holds

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LicenceCC BY
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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.