Evidence map›Paper›PMID 34882699›Full record

ArticlePloS one2021

Serum and plasma brain-derived neurotrophic factor concentration are elevated by systemic but not local passive heating.

Takahiro Ogawa, Sven P Hoekstra, Yoshi-Ichiro Kamijo, Victoria L Goosey-Tolfrey, Jeremy J Walsh, Fumihiro Tajima F, Christof A Leicht

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.6field-weighted citation impact, top 33% 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

5 citing papers in PubMed, 11 citations in OpenAlex.

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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

7 authors at 3 institutions in 3 countries.

Takahiro OgawaDepartment of Rehabilitation Medicine, Wakayama Medical University, Wakayama, Japan.
Sven P HoekstraThe Peter Harrison Centre for Disability Sport, Loughborough University, Loughborough, United Kingdom.ORCID 0000-0003-1597-162X
Yoshi-Ichiro KamijoDepartment of Rehabilitation Medicine, Wakayama Medical University, Wakayama, Japan.
Victoria L Goosey-TolfreyThe Peter Harrison Centre for Disability Sport, Loughborough University, Loughborough, United Kingdom.ORCID 0000-0001-7203-4144
Jeremy J WalshDepartment of Kinesiology, McMaster University, Hamilton, Ontario, Canada.
Fumihiro Tajima FDepartment of Rehabilitation Medicine, Wakayama Medical University, Wakayama, Japan.
Christof A LeichtThe Peter Harrison Centre for Disability Sport, Loughborough University, Loughborough, United Kingdom.
Loughborough University · GBWakayama Medical University · JPMcMaster University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Brain-derived neurotrophic factor (BDNF) plays a key role in neuronal adaptations. While previous studies suggest that whole-body heating can elevate circulating BDNF concentration, this is not known for local heating protocols. This study investigated the acute effects of whole-body versus local passive heating on serum and plasma BDNF concentration. Using a water-perfused suit, ten recreationally active males underwent three 90 min experimental protocols: heating of the legs with upper-body cooling (LBH), whole-body heating (WBH) and a control condition (CON). Blood samples were collected before, immediately after and 1 h post-heating for the determination of serum and plasma BDNF concentration, platelet count as well as the BDNF release per platelet. Rectal temperature, cardiac output and femoral artery shear rate were assessed at regular intervals. Serum and plasma BDNF concentration were elevated after WBH (serum: 19.1±5.0 to 25.9±11.3 ng/ml, plasma: 2.74±0.9 to 4.58±2.0; p<0.044), but not LBH (serum: 19.1±4.7 to 22.3±4.8 ng/ml, plasma: 3.25±1.13 to 3.39±0.90 ng/ml; p>0.126), when compared with CON (serum: 18.6±6.4 to 16.8±3.4 ng/ml, plasma: 2.49±0.69 to 2.82±0.89 ng/ml); accompanied by an increase in platelet count (p<0.001). However, there was no change in BDNF content per platelet after either condition (p = 0.392). All physiological measures were elevated to a larger extent after WBH compared with LBH (p<0.001), while shear rate and rectal temperature were higher during LBH than CON (p<0.038). In conclusion, WBH but not LBH acutely elevates circulating BDNF concentration. While these findings further support the use of passive heating to elevate BDNF concentration, a larger increase in shear rate, sympathetic activity and/or rectal temperature than found after LBH appears needed to induce an acute BDNF response by passive heating.

Indexed as

Body Temperature RegulationCold TemperatureAdultBrain-Derived Neurotrophic FactorHeatingHumansLower ExtremityMaleYoung AdultBDNF protein, humanBrain-Derived Neurotrophic Factor

Identifiers

PMID34882699
PMCPMC8659342
OpenAlexW4200256997

What OpenQuestion holds

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LicenceCC BY
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.