Evidence map›Paper›PMID 34518699›Full record

ArticleNature structural & molecular biology2021

Cryo-EM structures of hIAPP fibrils seeded by patient-extracted fibrils reveal new polymorphs and conserved fibril cores.

Qin Cao, David R Boyer, Michael R Sawaya, Romany Abskharon, Lorena Saelices, Binh A Nguyen, Jiahui Lu, Kevin A Murray, Fouad Kandeel, David S Eisenberg

Open access · greenAbstract readComparative Study
In one paragraph

Article in Nature structural & molecular biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed
11.1field-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

57 citing papers in PubMed, 84 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Mammals that can develop type 2 diabetes have a similarly structured β-sheet amyloid oligomer.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  8. A structural model of toxic amyloid oligomers involved in type 2 diabetes.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. The Structure of Human IAPP Fibrils Reflects Membrane and pH Conditions.Journal of the American Chemical Society · 2025
    Article
  15. Article
  16. Article
  17. Low-frequency Raman spectra of amyloid fibrils.The Journal of chemical physics · 2025
    Article
  18. Article
  19. Article
  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

10 authors at 2 institutions in 2 countries.

Qin CaoDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.
David R BoyerDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.ORCID http://orcid.org/0000-0002-4487-0230
Michael R SawayaDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.ORCID http://orcid.org/0000-0003-0874-9043
Romany AbskharonDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.
Lorena SaelicesDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.ORCID http://orcid.org/0000-0002-1904-2150
Binh A NguyenDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.ORCID http://orcid.org/0000-0001-7055-8809
Jiahui LuDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.
Kevin A MurrayDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.
Fouad KandeelDepartment of Translational Research & Cellular Therapeutics, City of Hope, Duarte, CA, USA.
David S EisenbergDepartments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA. david@mbi.ucla.edu.ORCID http://orcid.org/0000-0003-2432-5419
Howard Hughes Medical Institute · USCity of Hope · US

Funding

Towards Treatment of Alzheimer’s Disease by Targeting Pathogenic Tau and Beta-Amyloid StructuresR01AG070895 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI DAVID EISENBERG · 2022 to 2026
$5.8M
Structure and Inhibition of Amyloid in Alzheimer's DiseaseRF1AG054022 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI EISENBERG, DAVID · 2016 to 2018
$4.2M
Closing the gap between structural biology and translational science for amyloid diseasesDP2HL163810 · NHLBI · UT SOUTHWESTERN MEDICAL CENTER · PI SAELICES GOMEZ, LORENA · 2021 to 2024
$2.5M
Development of inhibitors and diagnostics for amyloid diseasesRF1AG048120 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI EISENBERG, DAVID · 2019 to 2019
$1.9M
Development of inhibitors for systemic amyloid diseasesR01AG048120 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI EISENBERG, DAVID · 2014 to 2018
$1.9M
Identifying distinct tau polymorphs in Alzheimer’s disease and development of early diagnostics for aggregation of tau polymorphsR56AG061847 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI EISENBERG, DAVID · 2018 to 2018
$797k
NHLBI NIH HHS DP2 HL163810NIA NIH HHS R01 AG048120NIA NIH HHS R01 AG070895NIA NIH HHS R56 AG061847NIA NIH HHS RF1 AG048120NIA NIH HHS RF1 AG054022
6 · The paper itself

Abstract

Amyloidosis of human islet amyloid polypeptide (hIAPP) is a pathological hallmark of type II diabetes (T2D), an epidemic afflicting nearly 10% of the world's population. To visualize disease-relevant hIAPP fibrils, we extracted amyloid fibrils from islet cells of a T2D donor and amplified their quantity by seeding synthetic hIAPP. Cryo-EM studies revealed four fibril polymorphic atomic structures. Their resemblance to four unseeded hIAPP fibrils varies from nearly identical (TW3) to non-existent (TW2). The diverse repertoire of hIAPP polymorphs appears to arise from three distinct protofilament cores entwined in different combinations. The structural distinctiveness of TW1, TW2 and TW4 suggests they may be faithful replications of the pathogenic seeds. If so, the structures determined here provide the most direct view yet of hIAPP amyloid fibrils formed during T2D.

Indexed as

Cryoelectron MicroscopyAmino Acid SequenceAmyloidCongo RedDiabetes Mellitus, Type 2GenotypeHumansIslet Amyloid PolypeptideIslets of LangerhansModels, MolecularPolymerase Chain ReactionProtein AggregatesProtein ConformationRecombinant ProteinsSequence Analysis, DNAStaining and LabelingAmyloidCongo RedIslet Amyloid PolypeptideProtein AggregatesRecombinant Proteins

Identifiers

PMID34518699
PMCPMC10396428
OpenAlexW3198789331

What OpenQuestion holds

Textmetadata
LicenceTDM
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.