Evidence map›Paper›PMID 34342595›Full record

Trial reportEuropean journal of endocrinology2021

Metabolic effects of brown fat in transitioning from hyperthyroidism to euthyroidism.

Lijuan Sun, Hui Jen Goh, Sanjay Verma, Priya Govindharajulu, Suresh Anand Sadananthan, Navin Michael, Yaligar Jadegoud, Christiani Jeyakumar Henry, S Sendhil Velan, Pei Shan Yeo and 11 more

Open access · hybridAbstract readClinical Trial
In one paragraph

Trial report in European journal of endocrinology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.4field-weighted citation impact, top 19% 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

12 citing papers in PubMed, 16 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

21 authors at 6 institutions in 2 countries.

Lijuan SunSingapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore.
Hui Jen GohSingapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore.
Sanjay VermaInstitute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore.
Priya GovindharajuluSingapore Institute of Food and Biotechnology Innovation, Agency for Science, Technology and Research (A*STAR), Singapore.
Suresh Anand SadananthanSingapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore.
Navin MichaelSingapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore.
Yaligar JadegoudInstitute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore.
Christiani Jeyakumar HenrySingapore Institute of Food and Biotechnology Innovation, Agency for Science, Technology and Research (A*STAR), Singapore.
S Sendhil VelanSingapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore.
Pei Shan YeoLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Yingshan LeeLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Brenda Su Ping LimLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Huiling LiewLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Chee Kian ChewLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Timothy Peng Lim QuekLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Shaikh A K K Abdul ShakoorLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Wai Han HoiLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Siew Pang ChanYong Loo Lin School of Medicine, National University of Singapore, Singapore.
Daniel Ek ChewLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Rinkoo DalanLee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore.
Melvin Khee Shing LeowSingapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore.
Agency for Science, Technology and Research · SGNanyang Technological University · SGTan Tock Seng Hospital · SGNational University of Singapore · SGSingapore Institute for Clinical Sciences · SGYong In University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveBrown adipose tissue (BAT) controls metabolic rate through thermogenesis. As its regulatory factors during the transition from hyperthyroidism to euthyroidism are not well established, our study investigated the relationships between supraclavicular brown adipose tissue (sBAT) activity and physiological/metabolic changes with changes in thyroid status.

designParticipants with newly diagnosed Graves' disease were recruited. A thionamide antithyroid drug (ATD) such as carbimazole (CMZ) or thiamazole (TMZ) was prescribed in every case. All underwent energy expenditure (EE) measurement and supraclavicular infrared thermography (IRT) within a chamber calorimeter, as well as 18F-fluorodeoxyglucose (18F-FDG) positron-emission tomography/magnetic resonance (PET/MR) imaging scanning, with clinical and biochemical parameters measured during hyperthyroidism and repeated in early euthyroidism. PET sBAT mean/maximum standardized uptake value (SUV mean/max), MR supraclavicular fat fraction (sFF) and mean temperature (Tscv) quantified sBAT activity.

resultsTwenty-one (16 female/5 male) participants aged 39.5 ± 2.5 years completed the study. The average duration to attain euthyroidism was 28.6 ± 2.3 weeks. Eight participants were BAT-positive while 13 were BAT-negative. sFF increased with euthyroidism (72.3 ± 1.4% to 76.8 ± 1.4%; P < 0.01), but no changes were observed in PET SUV mean and Tscv. Significant changes in serum-free triiodothyronine (FT3) levels were related to BAT status (interaction P value = 0.04). FT3 concentration at hyperthyroid state was positively associated with sBAT PET SUV mean (r = 0.58, P = 0.01) and resting metabolic rate (RMR) (P < 0.01).

conclusionHyperthyroidism does not consistently lead to a detectable increase in BAT activity. FT3 reduction during the transition to euthyroidism correlated with BAT activity.

Indexed as

Adipose Tissue, BrownAdultAgedAntithyroid AgentsBody CompositionCarbimazoleEnergy MetabolismFemaleFluorodeoxyglucose F18Graves DiseaseHumansHyperthyroidismMagnetic Resonance ImagingMaleMethimazoleMiddle AgedAntithyroid AgentsCarbimazoleFluorodeoxyglucose F18Methimazole

Identifiers

PMID34342595
PMCPMC8428075
OpenAlexW3191206388

What OpenQuestion holds

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LicenceCC BY
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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.