Evidence map›Paper›PMID 33758187›Full record

ArticleNature communications2021

NAC blocks Cystatin C amyloid complex aggregation in a cell system and in skin of HCCAA patients.

Michael E March, Alvaro Gutierrez-Uzquiza, Asbjorg Osk Snorradottir, Leticia S Matsuoka, Noelia Fonseca Balvis, Thorgeir Gestsson, Kenny Nguyen, Patrick M A Sleiman, Charlly Kao, Helgi J Isaksson and 4 more

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07716865 (Safety, Tolerability and Efficacy of NPI-001 in Patients With Hereditary Cystatin C Amyloid Angiopathy), which is not on this map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
1.1field-weighted citation impact, top 23% 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.

NCT07716865 phase2active not recruitingnot on this mapstarted 2024, after this paper: background citation

Safety, Tolerability and Efficacy of NPI-001 in Patients With Hereditary Cystatin C Amyloid Angiopathy (HCCAA)

TypeinterventionalSponsorArctic TherapeuticsRan2024 to 2027Enrolled15ConditionsHereditary Cystatin C Amyloid Angiopathy (HCCAA), Hemorrhage Brain, Hemorrhage CerebralArmsNACA
3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 12 citations in OpenAlex.

  1. Review
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  3. Redefining the role of the thiol-based agentRSC medicinal chemistry · 2026
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  4. 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

14 authors at 4 institutions in 3 countries.

Michael E March *The Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.ORCID 0000-0001-9173-6862
Alvaro Gutierrez-Uzquiza *The Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
Asbjorg Osk SnorradottirDepartment of Pathology, Landspitali University Hospital, Reykjavik, Iceland.
Leticia S MatsuokaThe Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
Noelia Fonseca BalvisDepartment of Biochemistry and Molecular Biology, Complutense Univeristy of Madrid, Madrid, Spain.
Thorgeir GestssonFaculty of Medicine, University of Iceland, Reykjavik, Iceland.
Kenny NguyenThe Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
Patrick M A SleimanThe Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
Charlly KaoThe Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
Helgi J IsakssonDepartment of Pathology, Landspitali University Hospital, Reykjavik, Iceland.
Birkir Thor BragasonInstitute for Experimental Pathology at Keldur, University of Iceland, Reykjavik, Iceland.
Elias OlafssonFaculty of Medicine, University of Iceland, Reykjavik, Iceland.
Astridur PalsdottirInstitute for Experimental Pathology at Keldur, University of Iceland, Reykjavik, Iceland.
Hakon HakonarsonThe Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. hakonarson@chop.edu.ORCID 0000-0003-2814-7461
Children's Hospital of Philadelphia · USReykjavík University · ISUniversidad Complutense de Madrid · ESUniversity of Iceland · IS

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hereditary cystatin C amyloid angiopathy is a dominantly inherited disease caused by a leucine to glutamine variant of human cystatin C (hCC). L68Q-hCC forms amyloid deposits in brain arteries associated with micro-infarcts, leading ultimately to paralysis, dementia and death in young adults. To evaluate the ability of molecules to interfere with aggregation of hCC while informing about cellular toxicity, we generated cells that produce and secrete WT and L68Q-hCC and have detected high-molecular weight complexes formed from the mutant protein. Incubations of either lysate or supernatant containing L68Q-hCC with reducing agents glutathione or N-acetyl-cysteine (NAC) breaks oligomers into monomers. Six L68Q-hCC carriers taking NAC had skin biopsies obtained to determine if hCC deposits were reduced following NAC treatment. Remarkably, ~50-90% reduction of L68Q-hCC staining was observed in five of the treated carriers suggesting that L68Q-hCC is a clinical target for reducing agents.

Indexed as

AcetylcysteineAmyloidogenic ProteinsBiopsyCerebral Amyloid Angiopathy, FamilialCystatin CCystatinsGene ExpressionGlutathioneHEK293 CellsHumansSkinYoung AdultAcetylcysteineAmyloidogenic ProteinsCST3 protein, humanCystatin CCystatinsGlutathioneL68Q cystatin C

Identifiers

PMID33758187
PMCPMC7988011
OpenAlexW3137543665

What OpenQuestion holds

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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.