Evidence map›Paper›PMID 18340018›Full record

ArticleDiabetes2008

Reduced glucocorticoid production rate, decreased 5alpha-reductase activity, and adipose tissue insulin sensitization after weight loss.

Jeremy W Tomlinson, Joanne Finney, Beverly A Hughes, Susan V Hughes, Paul M Stewart

Registry-linked trialOpen access · bronzeAbstract read
In one paragraph

Article in Diabetes, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04305093 (Precision Analytical Retrospective Data Correlation), which is not on this map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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.

NCT04305093 completednot on this mapstarted 2019, after this paper: background citation

Precision Analytical Retrospective Data Correlation

TypeobservationalSponsorPrecision Analytical, Inc.Ran2019 to 2023Enrolled144,561ConditionsObesity, Endocrine, Hormone Disturbance
3 · Its place in the literature

Who cites it

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 89 citations in OpenAlex.

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  14. Adrenal Incidentaloma.Endocrine reviews · 2020
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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 3 institutions in 1 country.

Jeremy W TomlinsonDivision of Medical Sciences, Institute of Biomedical Research, University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham, UK. j.w.tomlinson@bham.ac.uk
Joanne Finney
Beverly A Hughes
Susan V Hughes
Paul M Stewart
Queen Elizabeth Hospital Birmingham · GBNational Health Service · GBUniversity of Birmingham · GB

Funding

Medical Research Council G0502165Wellcome Trust 066357/Z/01/ZWellcome Trust 075322Wellcome Trust 075322/Z/04/Z
6 · The paper itself

Abstract

objectiveThe epidemics of obesity, insulin resistance, and type 2 diabetes have heightened the need to understand mechanisms that contribute to their pathogenesis. Increased endogenous glucocorticoid production has been implicated based on parallels with Cushing's syndrome. We have assessed the impact of weight loss on glucocorticoid secretion and metabolism (notably 11beta-hydroxysteroid dehydrogenase type 1 and 5alpha-reductase [5alphaR] activity) and insulin sensitivity. RESEARCH DESIGN AND

methodsTwenty obese volunteers were investigated before and after weight loss. Patients underwent hyperinsulinemic-euglycemic clamps with simultaneous adipose microdialysis and oral cortisone acetate administration. Changes in glucocorticoid secretion and metabolism were assessed using 24-h urine collections.

resultsBefore weight loss, fat mass correlated with glucocorticoid secretion rate (total fat, r = 0.46, P < 0.05; trunk fat, r = 0.52, P < 0.05); however, glucocorticoid secretion rate was inversely related to insulin sensitivity (r = -0.51, P < 0.05). Hyperinsulinemia failed to suppress adipose tissue interstitial fluid glycerol release (180 +/- 50 micromol [basal] vs. 153 +/- 10 micromol [steady state], NS). After oral cortisone (25 mg), cortisol concentrations within adipose interstitial fluid increased (4.3 +/- 1.1 vs. 14.2 +/- 2.6 nmol/l, P < 0.01), but glycerol concentrations did not change. After weight loss, insulin sensitivity increased. Consistent with insulin sensitization, adipose tissue interstitial fluid glycerol concentrations fell under hyperinsulinemic conditions (186 +/- 16 vs. 117 +/- 9 micromol, P < 0.05). Glucocorticoid secretion decreased (11,751 +/- 1,520 vs. 7,464 +/- 937 microg/24 h, P < 0.05) as did 5alphaR activity (5alpha-tetrahydrocortisol-to-tetrahydrocortisol ratio 1.41 +/- 0.16 vs. 1.12 +/- 0.17, P < 0.005).

conclusionsObesity is associated with insulin resistance within adipose tissue and increased cortisol secretion rates; both are reversed with weight loss. Reduced 5alphaR activity after weight loss may decrease hypothalamo-pituitary-adrenal axis activation and reduce glucocorticoid metabolite production.

Indexed as

Weight LossAdipose TissueAdultBody CompositionBody Mass IndexCholestenone 5 alpha-ReductaseDiet, ReducingEnergy IntakeFemaleGlucocorticoidsGlucose Clamp TechniqueHumansHyperinsulinismInsulinKineticsMaleCholestenone 5 alpha-ReductaseGlucocorticoidsInsulin

Identifiers

PMID18340018
PMCPMC7611651
OpenAlexW2137686969

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.