Evidence map›Paper›PMID 32333729›Full record

ArticleAnnals of clinical and translational neurology2020

Magnetization transfer ratio quantifies polyneuropathy in hereditary transthyretin amyloidosis.

Jennifer Kollmer, Ute Hegenbart, Christoph Kimmich, Ernst Hund, Jan C Purrucker, John M Hayes, Stephen I Lentz, Georges Sam, Johann M E Jende, Stefan O Schönland and 3 more

Open access · goldAbstract read
In one paragraph

Article in Annals of clinical and translational neurology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.5field-weighted citation impact, top 18% 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

16 citing papers in PubMed, 31 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Advances in diagnosis and management of distal sensory polyneuropathies.Journal of neurology, neurosurgery, and psychiatry · 2023
    Review
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Magnetic Resonance Neurography: Improved Diagnosis of Peripheral Neuropathies.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2021
    Article
  16. Review
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

13 authors at 2 institutions in 2 countries.

Jennifer KollmerDepartment of Neuroradiology, Heidelberg University Hospital, Heidelberg, Germany.ORCID 0000-0002-6254-9192
Ute HegenbartAmyloidosis Center Heidelberg, Heidelberg University Hospital, Heidelberg, Germany.
Christoph KimmichAmyloidosis Center Heidelberg, Heidelberg University Hospital, Heidelberg, Germany.
Ernst HundAmyloidosis Center Heidelberg, Heidelberg University Hospital, Heidelberg, Germany.
Jan C PurruckerAmyloidosis Center Heidelberg, Heidelberg University Hospital, Heidelberg, Germany.
John M HayesDepartment of Neurology, University of Michigan, Ann Arbor, MI.
Stephen I LentzDepartment of Internal Medicine, Division of Metabolism, Endocrinology & Diabetes, University of Michigan, Ann Arbor, MI.
Georges SamDepartment of Neurology, Heidelberg University Hospital, Heidelberg, Germany.
Johann M E JendeDepartment of Neuroradiology, Heidelberg University Hospital, Heidelberg, Germany.ORCID 0000-0002-1387-9304
Stefan O SchönlandAmyloidosis Center Heidelberg, Heidelberg University Hospital, Heidelberg, Germany.
Martin BendszusDepartment of Neuroradiology, Heidelberg University Hospital, Heidelberg, Germany.
Sabine HeilandDepartment of Neuroradiology, Heidelberg University Hospital, Heidelberg, Germany.
Markus WeilerAmyloidosis Center Heidelberg, Heidelberg University Hospital, Heidelberg, Germany.ORCID 0000-0002-8942-7662
Heidelberg University · DEUniversity of Michigan · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo quantify peripheral nerve lesions in symptomatic and asymptomatic hereditary transthyretin amyloidosis with polyneuropathy (ATTRv-PNP) by analyzing the magnetization transfer ratio (MTR) of the sciatic nerve, and to test its potential as a novel biomarker for macromolecular changes.

methodsTwenty-five patients with symptomatic ATTRv-PNP, 30 asymptomatic carriers of the mutant transthyretin gene (mutTTR), and 20 age-/sex-matched healthy controls prospectively underwent magnetization transfer contrast imaging at 3 Tesla. Two axial three-dimensional gradient echo sequences with and without an off-resonance saturation rapid frequency pulse were conducted at the right distal thigh. Sciatic nerve regions of interest were manually drawn on 10 consecutive axial slices in the images without off-resonance saturation, and then transferred to the corresponding slices that were generated by the sequence with the off-resonance saturation pulse. Subsequently, the MTR and cross-sectional area (CSA) of the sciatic nerve were evaluated. Detailed neurologic and electrophysiologic examinations were conducted in all ATTRv-PNP patients and mutTTR-carriers.

resultsSciatic nerve MTR and CSA reliably differentiated between ATTRv-PNP, mutTTR-carriers, and controls. MTR was lower in ATTRv-PNP (26.4 ± 0.7; P < 0.0001) and in mutTTR-carriers (32.6 ± 0.8; P = 0.0005) versus controls (39.4 ± 2.1), and was also lower in ATTRv-PNP versus mutTTR-carriers (P = 0.0009). MTR correlated negatively with the NIS-LL and positively with CMAPs and SNAPs. CSA was higher in ATTRv-PNP (34.3 ± 1.7 mm

interpretationMTR is a novel imaging marker that can quantify macromolecular changes in ATTRv-PNP and differentiate between symptomatic ATTRv-PNP and asymptomatic mutTTR-carriers and correlates with electrophysiology.

Indexed as

AdultAgedAmyloid Neuropathies, FamilialBiomarkersCase-Control StudiesFemaleHeterozygoteHumansMagnetic Resonance ImagingMaleMiddle AgedPolyneuropathiesPrealbuminProspective StudiesSciatic NerveYoung AdultBiomarkersPrealbuminTTR protein, human

Identifiers

PMID32333729
PMCPMC7261747
OpenAlexW3017892885

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.