Evidence map›Paper›PMID 33031379›Full record

ArticlePloS one2020

Brown fat does not cause cachexia in cancer patients: A large retrospective longitudinal FDG-PET/CT cohort study.

Anton S Becker, Caroline Zellweger, Sara Bacanovic, Sabine Franckenberg, Hannes W Nagel, Lukas Frick, Khoschy Schawkat, Matthias Eberhard, Christian Blüthgen, Jörk Volbracht and 3 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2020. 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
2.2field-weighted citation impact, top 12% 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, 31 citations in OpenAlex.

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  7. Physical Activity, Exerkines, and Their Role in Cancer Cachexia.International journal of molecular sciences · 2025
    Review
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  16. Unraveling the lost balance: Adrenergic dysfunction in cancer cachexia.Autonomic neuroscience : basic & clinical · 2024
    Review
  17. Article
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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

13 authors at 2 institutions in 2 countries.

Anton S BeckerDepartment of Health Sciences and Technology; Institute of Food, Nutrition and Health, ETH Zurich, Schwerzenbach, Switzerland.ORCID 0000-0001-8372-6496
Caroline ZellwegerDepartment of Nuclear Medicine, University Hospital Zurich, Zurich, Switzerland.
Sara BacanovicDepartment of Nuclear Medicine, University Hospital Zurich, Zurich, Switzerland.
Sabine FranckenbergInstitute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland.ORCID 0000-0002-8326-0777
Hannes W NagelDepartment of Nuclear Medicine, University Hospital Zurich, Zurich, Switzerland.
Lukas FrickDepartment of Pathology and Molecular Pathology, University Hospital Zurich, Zurich, Switzerland.
Khoschy SchawkatInstitute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland.
Matthias EberhardInstitute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland.
Christian BlüthgenInstitute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland.ORCID 0000-0001-7321-5676
Jörk VolbrachtDivision of Controlling and Data Management, University Hospital Zurich, Zurich, Switzerland.
Rudolf MoosDivision of Controlling and Data Management, University Hospital Zurich, Zurich, Switzerland.
Christian WolfrumDepartment of Health Sciences and Technology; Institute of Food, Nutrition and Health, ETH Zurich, Schwerzenbach, Switzerland.
Irene A BurgerDepartment of Nuclear Medicine, University Hospital Zurich, Zurich, Switzerland.ORCID 0000-0001-8029-8692
University Hospital of Zurich · CHETH Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBrown adipose tissue (BAT) is a specialized form of adipose tissue, able to increase energy expenditure by heat generation in response to various stimuli. Recently, its pathological activation has been implicated in the pathogenesis of cancer cachexia. To establish a causal relationship, we retrospectively investigated the longitudinal changes in BAT and cancer in a large FDG-PET/CT cohort.

methodsWe retrospectively analyzed 13 461 FDG-PET/CT examinations of n = 8 409 patients at our institution from the winter months of 2007-2015. We graded the activation strength of BAT based on the anatomical location of the most caudally activated BAT depot into three tiers, and the stage of the cancer into five general grades. We validated the cancer grading by an interreader analysis and correlation with histopathological stage. Ambient temperature data (seven-day average before the examination) was obtained from a meteorological station close to the hospital. Changes of BAT, cancer, body mass index (BMI) and temperature between the different examinations were examined with Spearman's test and a mixed linear model for correlation, and with a causal inference algorithm for causality.

resultsWe found n = 283 patients with at least two examinations and active BAT in at least one of them. There was no significant interaction between the changes in BAT activation, cancer burden or BMI. Temperature changes exhibited a strong negative correlation with BAT activity (ϱ = -0.57, p<0.00001). These results were confirmed with the mixed linear model. Causal inference revealed a link of Temperature ➜ BAT in all subjects and also of BMI ➜ BAT in subjects who had lost weight and increased cancer burden, but no role of cancer and no causal links of BAT ➜ BMI.

conclusionsOur data did not confirm the hypothesis that BAT plays a major role in cancer-mediated weight loss. Temperature changes are the main driver of incidental BAT activity on FDG-PET scans.

Indexed as

Positron Emission Tomography Computed TomographyAdipose Tissue, BrownAdultAgedBody Mass IndexBody TemperatureCachexiaCohort StudiesFemaleFluorodeoxyglucose F18HumansMaleMiddle AgedNeoplasm GradingNeoplasmsRetrospective StudiesFluorodeoxyglucose F18

Identifiers

PMID33031379
PMCPMC7544086
OpenAlexW3091925169

What OpenQuestion holds

Textmetadata
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.