Longitudinal association between serum leptin concentration and glomerular filtration rate in humans

Claudio Pedone, Baback Roshanravan, Simone Scarlata, Kushang V. Patel, Luigi Ferrucci, Raffaele Antonelli Incalzi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Background: Obesity is a risk factor for decline in glomerular filtration rate (GFR). One proposed mechanism leading to glomerulopathy is an increase in leptin levels. However, the association between leptin and GFR has never been demonstrated. The aim of this study is to verify whether higher levels of leptin are associated with longitudinal changes of estimated GFR (eGFR). Methods and findings: We selected 744 participants in the InCHIANTI study (416 women). The association between eGFR and leptin changes over a 6-years follow-up was assessed using random effect models including leptin as a time-varying covariate and adjusted for potential confounders. We also compared the proportion of patients with rapid decline of renal function across tertiles of change in serum leptin between baseline and 6-years follow-up. Mean baseline eGFR was 82.2 ml/min/1.73 m, 78.7 ml/min/1.73 m, and 75.4 ml/min/1.73 m in the first, second and third tertile of baseline serum leptin concentration, respectively. After adjustment for potential confounders, leptin concentration was inversely associated with changes of eGFR over time (β for log-leptin: -1.288, 95% CI: -2.079 - -0.497). Relative to baseline levels, the estimated change in eGFR for unit-increase in log-leptin was -1.9% (95% CI: -2.977 - -0.761). After stratification by sex, the results were confirmed in women only. In women we also found an association between increasing leptin concentration over time and rapid decline of renal function. Conclusions: In women, serum leptin may contribute to eGFR decline independently from obesity and diabetes mellitus, although a cause-effect relationship cannot be established due to the observational nature of our study. A better characterization of adipokine profile of obese individuals may shed light on the accelerated renal function decline reported in a proportion of high-risk obese individuals.

Original languageEnglish (US)
Article numbere0117828
JournalPloS one
Volume10
Issue number2
DOIs
StatePublished - Feb 24 2015
Externally publishedYes

Fingerprint

glomerular filtration rate
Leptin
leptin
Glomerular Filtration Rate
Serum
renal function
Kidney
obesity
Obesity
glomerulopathy
adipokines
Adipokines
Medical problems
diabetes mellitus
Diabetes Mellitus
risk factors

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

Cite this

Longitudinal association between serum leptin concentration and glomerular filtration rate in humans. / Pedone, Claudio; Roshanravan, Baback; Scarlata, Simone; Patel, Kushang V.; Ferrucci, Luigi; Incalzi, Raffaele Antonelli.

In: PloS one, Vol. 10, No. 2, e0117828, 24.02.2015.

Research output: Contribution to journalArticle

Pedone, Claudio ; Roshanravan, Baback ; Scarlata, Simone ; Patel, Kushang V. ; Ferrucci, Luigi ; Incalzi, Raffaele Antonelli. / Longitudinal association between serum leptin concentration and glomerular filtration rate in humans. In: PloS one. 2015 ; Vol. 10, No. 2.
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abstract = "Background: Obesity is a risk factor for decline in glomerular filtration rate (GFR). One proposed mechanism leading to glomerulopathy is an increase in leptin levels. However, the association between leptin and GFR has never been demonstrated. The aim of this study is to verify whether higher levels of leptin are associated with longitudinal changes of estimated GFR (eGFR). Methods and findings: We selected 744 participants in the InCHIANTI study (416 women). The association between eGFR and leptin changes over a 6-years follow-up was assessed using random effect models including leptin as a time-varying covariate and adjusted for potential confounders. We also compared the proportion of patients with rapid decline of renal function across tertiles of change in serum leptin between baseline and 6-years follow-up. Mean baseline eGFR was 82.2 ml/min/1.73 m, 78.7 ml/min/1.73 m, and 75.4 ml/min/1.73 m in the first, second and third tertile of baseline serum leptin concentration, respectively. After adjustment for potential confounders, leptin concentration was inversely associated with changes of eGFR over time (β for log-leptin: -1.288, 95{\%} CI: -2.079 - -0.497). Relative to baseline levels, the estimated change in eGFR for unit-increase in log-leptin was -1.9{\%} (95{\%} CI: -2.977 - -0.761). After stratification by sex, the results were confirmed in women only. In women we also found an association between increasing leptin concentration over time and rapid decline of renal function. Conclusions: In women, serum leptin may contribute to eGFR decline independently from obesity and diabetes mellitus, although a cause-effect relationship cannot be established due to the observational nature of our study. A better characterization of adipokine profile of obese individuals may shed light on the accelerated renal function decline reported in a proportion of high-risk obese individuals.",
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