Evidence map›Paper›PMID 33768561›Full record

ArticleNeuropathology and applied neurobiology2021

Irisin treatment lowers levels of phosphorylated tau in the hippocampus of pre-symptomatic female but not male htau mice.

Katie A Bretland, Li Lin, Kimberly M Bretland, Matthew A Smith, Sheila M Fleming, Christine M Dengler-Crish

Open access · bronzeAbstract read
In one paragraph

Article in Neuropathology and applied neurobiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

24 citing papers in PubMed, 35 citations in OpenAlex.

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  7. Current updates on latest basic research of scientific relevance in hypertensive dementia.Hypertension research : official journal of the Japanese Society of Hypertension · 2026
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  8. Review
  9. Therapeutic Potential of Irisin in Neurodegenerative Diseases.International journal of molecular sciences · 2025
    Review
  10. Twenty years of therapeutic development in tauopathy mouse models: a scoping review.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
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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

6 authors at 3 institutions in 1 country.

Katie A BretlandDepartment of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA.
Li LinDepartment of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA.
Kimberly M BretlandDepartment of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA.
Matthew A SmithDepartment of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA.
Sheila M FlemingDepartment of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA.
Christine M Dengler-CrishDepartment of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA.ORCID 0000-0002-8293-2893
Northeast Ohio Medical University · USKent State University · USAkron Children's Hospital · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsIrisin is a hormone cleaved from fibronectin type-III domain-containing protein 5 in response to exercise and may be therapeutic in Alzheimer's disease (AD). Irisin is shown to repair damage caused by midlife cardiometabolic risk factors for AD (i.e., diabetes mellitus; hypertension), prevent neural amyloid beta aggregation and reduce neuroinflammation. However, there are no investigations of irisin's effect on AD-associated tauopathy in the brain. This study begins to address this gap in knowledge.

methodsTransgenic htau mice that selectively develop age-related tauopathy were treated with recombinant irisin (100 µg/kg weekly i.p.) beginning at a pre-symptomatic age (4 months) to determine if irisin could prevent emergence of early neuropathology. One month later, mice were sacrificed to collect brain tissue and serum. Protein levels of ptau (serine 202), inflammatory cytokine tumour necrosis factor alpha (TNFα) and FNDC5 were quantified using capillary-based western blotting (Wes).

resultsOur data show that irisin treatment significantly reduced ptau and TNFα in the hippocampus and serum of female htau mice compared to vehicle-treated controls. Irisin treatment did not alter ptau levels in male htau hippocampus and appeared to enhance both neural and systemic TNFα levels.

conclusionsThis study provides the first evidence that enhancing the endogenous hormone irisin may be therapeutic against emerging neuropathology in a tauopathy-selective AD model. This is important because there are currently no disease-modifying therapeutics available for AD, and few agents in development address the multiple disease targets irisin appears to-making irisin an intriguing therapeutic candidate for further investigation.

Indexed as

Alzheimer DiseaseAmyloid beta-PeptidesAnimalsDisease Models, AnimalFemaleHippocampusMaleMiceNeuroinflammatory DiseasesNeuronsSex FactorsTauopathiestau ProteinsAmyloid beta-Peptidestau ProteinsAlzheimer's diseaseanti-inflammatory agentsdementiametabolic diseasesneurofibrillary tanglesphysical exertiontauopathies

Identifiers

PMID33768561
PMCPMC9292848
OpenAlexW3136163368

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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.