Evidence map›Paper›PMID 33359475›Full record

ArticleExperimental neurology2021

Delayed onset of inherited ALS by deletion of the BDNF receptor TrkB.T1 is non-cell autonomous.

Sudhirkumar Yanpallewar, Gianluca Fulgenzi, Francesco Tomassoni-Ardori, Colleen Barrick, Lino Tessarollo

Open access · hybridAbstract read
In one paragraph

Article in Experimental neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 13% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.

  1. Pooled it
  2. Disruption of BDNF signalling in neuropathologies.Biochemical Society transactions · 2026
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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

5 authors at 1 institution in 1 country.

Sudhirkumar YanpallewarNeural Development Section, Mouse Cancer Genetics Program, CCR, NCI, NIH, USA.
Gianluca FulgenziNeural Development Section, Mouse Cancer Genetics Program, CCR, NCI, NIH, USA.
Francesco Tomassoni-ArdoriNeural Development Section, Mouse Cancer Genetics Program, CCR, NCI, NIH, USA.
Colleen BarrickNeural Development Section, Mouse Cancer Genetics Program, CCR, NCI, NIH, USA.
Lino TessarolloNeural Development Section, Mouse Cancer Genetics Program, CCR, NCI, NIH, USA. Electronic address: tessarol@mail.nih.gov.
Cancer Genetics (United States) · US

Funding

Role of Neurotrophins in the Development of the Mammalian Nervous SystemZIABC010390 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI TESSAROLLO, LINO · 2009 to 2025
$14.2M
Role of Trk Receptors in the Development and Function of Non-neuronal StructuresZIABC010391 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI TESSAROLLO, LINO · 2009 to 2025
$14.0M
Intramural NIH HHS ZIA BC010391
6 · The paper itself

Abstract

The pathophysiology of Amyotrophic Lateral Sclerosis (ALS), a disease caused by the gradual degeneration of motoneurons, is still largely unknown. Insufficient neurotrophic support has been cited as one of the causes of motoneuron cell death. Neurotrophic factors such as BDNF have been evaluated in ALS human clinical trials, but yielded disappointing results attributed to the poor pharmacokinetics and pharmacodynamics of BDNF. In the inherited ALS G93A SOD1 animal model, deletion of the BDNF receptor TrkB.T1 delays spinal cord motoneuron cell death and muscle weakness through an unknown cellular mechanism. Here we show that TrkB.T1 is expressed ubiquitously in the spinal cord and its deletion does not change the SOD1 mutant spinal cord inflammatory state suggesting that TrkB.T1 does not influence microglia or astrocyte activation. Although TrkB.T1 knockout in astrocytes preserves muscle strength and co-ordination at early stages of disease, its specific conditional deletion in motoneurons or astrocytes does not delay motoneuron cell death during the early stage of the disease. These data suggest that TrkB.T1 may limit the neuroprotective BDNF signaling to motoneurons via a non-cell autonomous mechanism providing new understanding into the reasons for past clinical failures and insights into the design of future clinical trials employing TrkB agonists in ALS.

Indexed as

Amyotrophic Lateral SclerosisAnimalsCalcium SignalingGene DeletionInterleukin-1betaMacrophage ActivationMembrane GlycoproteinsMiceMice, Inbred C57BLMice, KnockoutMicrogliaMotor NeuronsProtein-Tyrosine KinasesPsychomotor PerformanceReceptor, trkBSpinal CordIL1B protein, mouseInterleukin-1betaMembrane GlycoproteinsNtrk2 protein, mouseProtein-Tyrosine KinasesReceptor, trkBSod1 protein, mouseSuperoxide Dismutase-1Tumor Necrosis Factor-alphaALSBDNFMotoneuron degenerationNeurotrophinReceptor tyrosine kinaseSpinal cord inflammationTrkB signalingTruncated TrkB

Identifiers

PMID33359475
PMCPMC9229840
OpenAlexW3113717507

What OpenQuestion holds

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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.