Bilirubin as an indicator of cardiometabolic health

Autor(en)

Nazlisadat Seyed Khoei, Karl-Heinz Wagner, Anja M Sedlmeier, Marc J Gunter, Neil Murphy, Heinz Freisling

Abstrakt

Background

Mildly elevated bilirubin, a by-product of hemoglobin breakdown, might mitigate cardiometabolic risk factors including adiposity, dyslipidemia, and high blood pressure (BP). We investigated the cross-sectional relationship between (total) bilirubin and baseline cardiometabolic risk factors in 467,519 UK Biobank study participants.
Methods

We used multivariable-adjusted linear regression to estimate associations between bilirubin levels and risk factors of cardiometabolic diseases including body mass index (BMI), waist and hip circumferences (WC, HC), waist-to-hip ratio (WHR), fat mass (FM), and trunk FM, and the blood lipids: apolipoprotein A-I (apoA-I), apolipoprotein B (apoB), apoB/apoA-I, lipoprotein (a), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), LDL/HDL, TC/HDL, triglycerides (TG). Log-transformed bilirubin was modelled with restricted cubic splines and predicted mean values with 99% confidence intervals (CI) for each risk marker were estimated, separately. Second, we applied principal component analysis (PCA) for dimension reduction to in turn six anthropometric traits (height, weight, BMI, WC, HC, and WHR) and all above lipids. Last, we estimated associations (99%CI) between bilirubin and three components of the metabolic syndrome, i.e. WC, TG, and BP using logistic regression.
Results

After multivariable adjustments, higher levels of bilirubin were inversely associated with indicators of general adiposity (BMI and FM) and of body fat distribution (WC, HC, WHR, and trunk FM) in both men and women. For example, women with mildly elevated bilirubin (95th percentile equal to 15.0 µmol/L), compared to women with low bilirubin (5th percentile equal to 4.5 µmol/L), had on average a 2.0 kg/m2 (99% CI 1.9–2.1) lower BMI. Inverse associations were also observed with dyslipidemia among men and women. For example, mildly elevated bilirubin among men (95th percentile equal to 19.4 µmol/L) compared to low levels of bilirubin (5th percentile equal to 5.5 µmol/L) were associated with approx. 0.55 mmol/L (99% CI 0.53–0.56) lower TG levels, with similar inverse associations among women. Multiple-trait analyses using PCA confirmed single-trait analyses. Men and women with mildly elevated bilirubin levels ≥ 17.1 µmol/L, compared to low-normal bilirubin < 10 µmol/L had 13% (99% CI 8%–18%) and 11% (99% CI 4%–17%) lower odds of exceeding systolic BP levels of ≥ 130 mm Hg, respectively.
Conclusions

Higher levels of bilirubin were inversely associated with cardiometabolic risk factors including adiposity, dyslipidemia, and hypertension.

Organisation(en)

Department für Ernährungswissenschaften, Forschungsplattform Active Ageing

Externe Organisation(en)

Universität Regensburg (UR), International Agency for Research on Cancer (IARC-WHO)

Journal

Cardiovascular Diabetology

Band

21

Anzahl der Seiten

13

ISSN

1475-2840

DOI

https://doi.org/10.1186/s12933-022-01484-x

Publikationsdatum

04-2022

Peer-reviewed

Ja

ÖFOS 2012

303009 Ernährungswissenschaften

Schlagwörter

Sustainable Development Goals

SDG 3 – Gesundheit und Wohlergehen

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/bilirubin-as-an-indicator-of-cardiometabolic-health(d54b07f0-b744-4c89-81e6-f10d0207218a).html