Evidence map›Paper›PMID 26842068›Full record

ArticleOpen biology2016

Pharmacological removal of serum amyloid P component from intracerebral plaques and cerebrovascular Aβ amyloid deposits in vivo.

Raya Al-Shawi, Glenys A Tennent, David J Millar, Angela Richard-Londt, Sebastian Brandner, David J Werring, J Paul Simons, Mark B Pepys

Open access · goldAbstract read
In one paragraph

Article in Open biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
1.8field-weighted citation impact, top 16% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 citations in OpenAlex.

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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

8 authors at 2 institutions in 1 country.

Raya Al-ShawiWolfson Drug Discovery Unit, Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, Royal Free Campus, University College London, Rowland Hill Street, London NW3 2PF, UK.ORCID http://orcid.org/0000-0002-9174-8924
Glenys A TennentWolfson Drug Discovery Unit, Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, Royal Free Campus, University College London, Rowland Hill Street, London NW3 2PF, UK.ORCID http://orcid.org/0000-0002-4645-5671
David J MillarWolfson Drug Discovery Unit, Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, Royal Free Campus, University College London, Rowland Hill Street, London NW3 2PF, UK.
Angela Richard-LondtDivision of Neuropathology and Department of Neurodegenerative Disease, Institute of Neurology, University College London, Queen Square, London WC1N 3BG, UK.
Sebastian BrandnerDivision of Neuropathology and Department of Neurodegenerative Disease, Institute of Neurology, University College London, Queen Square, London WC1N 3BG, UK.ORCID http://orcid.org/0000-0002-9821-0342
David J WerringStroke Research Group, Department of Brain Repair and Rehabilitation, Institute of Neurology, University College London, Queen Square, London WC1N 3BG, UK.ORCID http://orcid.org/0000-0003-2074-1861
J Paul SimonsWolfson Drug Discovery Unit, Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, Royal Free Campus, University College London, Rowland Hill Street, London NW3 2PF, UK.ORCID http://orcid.org/0000-0002-5007-6674
Mark B PepysWolfson Drug Discovery Unit, Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, Royal Free Campus, University College London, Rowland Hill Street, London NW3 2PF, UK m.pepys@ucl.ac.uk.ORCID http://orcid.org/0000-0003-2614-3248
The Royal Free Hospital · GBNational Hospital for Neurology and Neurosurgery · GB

Funding

Medical Research Council G0901596Medical Research Council G7900510
6 · The paper itself

Abstract

Human amyloid deposits always contain the normal plasma protein serum amyloid P component (SAP), owing to its avid but reversible binding to all amyloid fibrils, including the amyloid β (Aβ) fibrils in the cerebral parenchyma plaques and cerebrovascular amyloid deposits of Alzheimer's disease (AD) and cerebral amyloid angiopathy (CAA). SAP promotes amyloid fibril formation in vitro, contributes to persistence of amyloid in vivo and is also itself directly toxic to cerebral neurons. We therefore developed (R)-1-[6-[(R)-2-carboxy-pyrrolidin-1-yl]-6-oxo-hexanoyl]pyrrolidine-2-carboxylic acid (CPHPC), a drug that removes SAP from the blood, and thereby also from the cerebrospinal fluid (CSF), in patients with AD. Here we report that, after introduction of transgenic human SAP expression in the TASTPM double transgenic mouse model of AD, all the amyloid deposits contained human SAP. Depletion of circulating human SAP by CPHPC administration in these mice removed all detectable human SAP from both the intracerebral and cerebrovascular amyloid. The demonstration that removal of SAP from the blood and CSF also removes it from these amyloid deposits crucially validates the strategy of the forthcoming 'Depletion of serum amyloid P component in Alzheimer's disease (DESPIAD)' clinical trial of CPHPC. The results also strongly support clinical testing of CPHPC in patients with CAA.

Indexed as

Alzheimer DiseaseAmyloid beta-PeptidesAnimalsCerebral Amyloid AngiopathyDisease Models, AnimalHumansImmunohistochemistryMiceMice, TransgenicPlaque, AmyloidProtein Aggregation, PathologicalSerum Amyloid P-ComponentAmyloid beta-PeptidesSerum Amyloid P-ComponentAlzheimer's diseaseAβ amyloidcerebral amyloid angiopathyCPHPCserum amyloid P component

Identifiers

PMID26842068
PMCPMC4772805
OpenAlexW2266491555

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.