Causal relationship between obesity and serum testosterone status in men: A bi-directional mendelian randomization analysis
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Causal relationship between obesity and serum testosterone status in men : A bi-directional mendelian randomization analysis. / Eriksson, Joel; Haring, Robin; Grarup, Niels; Vandenput, Liesbeth; Wallaschofski, Henri; Lorentzen, Erik; Hansen, Torben; Mellström, Dan; Pedersen, Oluf; Nauck, Matthias; Lorentzon, Mattias; Nystrup Husemoen, Lise Lotte; Völzke, Henry; Karlsson, Magnus; Baumeister, Sebastian E; Linneberg, Allan; Ohlsson, Claes.
In: PloS one, Vol. 12, No. 4, e0176277, 2017.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Causal relationship between obesity and serum testosterone status in men
T2 - A bi-directional mendelian randomization analysis
AU - Eriksson, Joel
AU - Haring, Robin
AU - Grarup, Niels
AU - Vandenput, Liesbeth
AU - Wallaschofski, Henri
AU - Lorentzen, Erik
AU - Hansen, Torben
AU - Mellström, Dan
AU - Pedersen, Oluf
AU - Nauck, Matthias
AU - Lorentzon, Mattias
AU - Nystrup Husemoen, Lise Lotte
AU - Völzke, Henry
AU - Karlsson, Magnus
AU - Baumeister, Sebastian E
AU - Linneberg, Allan
AU - Ohlsson, Claes
PY - 2017
Y1 - 2017
N2 - CONTEXT: Obesity in men is associated with low serum testosterone and both are associated with several diseases and increased mortality.OBJECTIVES: Examine the direction and causality of the relationship between body mass index (BMI) and serum testosterone.DESIGN: Bi-directional Mendelian randomization (MR) analysis on prospective cohorts.SETTING: Five cohorts from Denmark, Germany and Sweden (Inter99, SHIP, SHIP Trend, GOOD and MrOS Sweden).PARTICIPANTS: 7446 Caucasian men, genotyped for 97 BMI-associated SNPs and three testosterone-associated SNPs.MAIN OUTCOME MEASURES: BMI and serum testosterone adjusted for age, smoking, time of blood sampling and site.RESULTS: 1 SD genetically instrumented increase in BMI was associated with a 0.25 SD decrease in serum testosterone (IV ratio: -0.25, 95% CI: -0.42--0.09, p = 2.8*10-3). For a body weight reduction altering the BMI from 30 to 25 kg/m2, the effect would equal a 13% increase in serum testosterone. No association was seen for genetically instrumented testosterone with BMI, a finding that was confirmed using large-scale data from the GIANT consortium (n = 104349).CONCLUSIONS: Our results suggest that there is a causal effect of BMI on serum testosterone in men. Population level interventions to reduce BMI are expected to increase serum testosterone in men.
AB - CONTEXT: Obesity in men is associated with low serum testosterone and both are associated with several diseases and increased mortality.OBJECTIVES: Examine the direction and causality of the relationship between body mass index (BMI) and serum testosterone.DESIGN: Bi-directional Mendelian randomization (MR) analysis on prospective cohorts.SETTING: Five cohorts from Denmark, Germany and Sweden (Inter99, SHIP, SHIP Trend, GOOD and MrOS Sweden).PARTICIPANTS: 7446 Caucasian men, genotyped for 97 BMI-associated SNPs and three testosterone-associated SNPs.MAIN OUTCOME MEASURES: BMI and serum testosterone adjusted for age, smoking, time of blood sampling and site.RESULTS: 1 SD genetically instrumented increase in BMI was associated with a 0.25 SD decrease in serum testosterone (IV ratio: -0.25, 95% CI: -0.42--0.09, p = 2.8*10-3). For a body weight reduction altering the BMI from 30 to 25 kg/m2, the effect would equal a 13% increase in serum testosterone. No association was seen for genetically instrumented testosterone with BMI, a finding that was confirmed using large-scale data from the GIANT consortium (n = 104349).CONCLUSIONS: Our results suggest that there is a causal effect of BMI on serum testosterone in men. Population level interventions to reduce BMI are expected to increase serum testosterone in men.
KW - Adolescent
KW - Adult
KW - Aged
KW - Body Mass Index
KW - Genetic Predisposition to Disease
KW - Humans
KW - Male
KW - Mendelian Randomization Analysis
KW - Obesity
KW - Phenotype
KW - Polymorphism, Single Nucleotide
KW - Testosterone
KW - Young Adult
KW - Journal Article
U2 - 10.1371/journal.pone.0176277
DO - 10.1371/journal.pone.0176277
M3 - Journal article
C2 - 28448539
VL - 12
JO - PLoS ONE
JF - PLoS ONE
SN - 1932-6203
IS - 4
M1 - e0176277
ER -
ID: 182972768