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Circulating leptin levels predict the decline in renal function with age in a sample of adult men (The Olivetti Heart Study)

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Abstract

Leptin (LPT) is associated with a number of cardiovascular risk factors, such as high blood pressure (BP), insulin resistance and excess in body weight. Some studies find an unfavorable cross-sectional association between LPT and renal disease, in particular in patients with already known kidney dysfunction. There are few data on the relationship between LPT and changes in renal function over time in subjects without evidence of kidney dysfunction. Hence, the aim of this study is to estimate the predictive role of LPT on the decline in renal function occurring in an 8-year follow-up observation of a sample of adult apparently healthy men (The Olivetti Heart Study). The study includes 319 untreated normotensive and nondiabetic men without clinical evidence of renal dysfunction (creatinine clearance-CrCl > 60 mL/min/1.73 m2) at baseline. At baseline, LPT is significantly and positively associated with BMI, abdominal circumference, BP and Homa index, no relationship is found with CrCl. At the end of the 8-year follow-up, a significant association is detected between baseline LPT and changes occurring in BP. Moreover, an inverse correlation with changes in CrCl is found (r = − 0.12). This unfavorable relationship between baseline LPT and decline in renal function is also confirmed in the multivariate analyses, after adjustment for all potential confounders (R2 = 0.42, p < 0.01). The results of this prospective investigation suggest a predictive role of circulating LPT levels on decline in renal function over time, independently of main potential confounders, in normotensive and nondiabetic men with normal renal function at baseline.

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Acknowledgements

Conception and design: LD, FG. Analysis and interpretation of the data: LD, MM, LP, FG. Drafting of the article: LD, MM, LP, PS, FG. Critical revision of the article for important intellectual content: LD, RI, OR, PS, FG. Final approval of the article: all Authors. Statistical expertise: LD, FG. Administrative, technical, or logistic support: RI, OR, PS, FG. Collection and assembly of data: LD, RI, OR.

Funding

The study was not supported by external funding.

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Authors and Affiliations

  1. Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, “Federico II” University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy

    Lanfranco D’Elia, Martina Manfredi, Ludovica Perna, Roberto Iacone, Ornella Russo, Pasquale Strazzullo & Ferruccio Galletti

Authors
  1. Lanfranco D’Elia
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  2. Martina Manfredi
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  3. Ludovica Perna
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  4. Roberto Iacone
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  5. Ornella Russo
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  6. Pasquale Strazzullo
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  7. Ferruccio Galletti
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Corresponding author

Correspondence to Ferruccio Galletti.

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All authors declare that they have no conflict of interest.

Statements on human and animal rights

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The local Ethics Committee (The Ethics Committee-Federico II University of Naples) approved the Olivetti study protocol.

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Written informed consent was obtained from all individual participants included in the study.

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D’Elia, L., Manfredi, M., Perna, L. et al. Circulating leptin levels predict the decline in renal function with age in a sample of adult men (The Olivetti Heart Study). Intern Emerg Med 14, 507–513 (2019). https://doi.org/10.1007/s11739-018-1924-9

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  • DOI: https://doi.org/10.1007/s11739-018-1924-9

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