Transforming growth factor-β1 levels in hypertensive patients: Association with body mass index and leptin

Ettore Porreca, Concetta Di Febbo, Ester Vitacolonna, Giovanna Baccante, Augusto Di Castelnuovo, Antonio Angelini, Francesca Febo, Marcello Di Nisio, Franco Cuccurullo

Research output: Contribution to journalArticle

Abstract

Background: Transforming growth factor-β1 (TGF-β1) has been demonstrated to be overexpressed in hypertension. Leptin, an adipocyte product, has been shown to play a role in obesity-related hypertension and in vitro studies demonstrated a biologic interaction between leptin and TGF-β1. Thus, we evaluate a possible in vivo association between TGF-β1, body mass index (BMI), and leptin circulating levels in hypertensive subjects. Methods: Blood samples for fasting leptin and TGF-β1, were evaluated in 29 overweight, 46 obese, and 29 nonobese hypertensive patients before and after a 12-week calorie-restricted diet. Monocyte cultures were used for in vitro experiments. Results: Transforming growth factor-β1 was significantly elevated in hypertensive obese patients (n = 46) as compared with TGF-β1 levels of hypertensive patients with normal BMI (n = 29) (8.9 ± 3 ng/mL v 4.4 ± 2; P <.001). The circulating levels of TGF-β1 were associated with BMI and leptin levels in an univariate analysis (r = 0.59, P <.0001; r = 0.62, P <.0001, respectively) and these associations were still present after stepwise multivariate analysis. Weight loss of 10% produced a parallel decrease in TGF-β1 (from 8.9 ± 3 ng/mL to 5.3 ± 2.8 ng/mL; P <.01) and leptin levels (from 30 ± 24 ng/mL to 17 ± 14; P <.05). In vitro experiments showed that leptin is able to induce a dose-dependent increase in TGF-β1 production and mRNA expression in human monocyte cultures. Conclusions: Our data indicate that TGF-β1 levels are positively associated with BMI and leptin levels in hypertensive patients and suggest that adipose tissue may be an important determinant of TGF-β1 levels possibly by a leptin-dependent pathway.

Original languageEnglish
Pages (from-to)759-765
Number of pages7
JournalAmerican Journal of Hypertension
Volume15
Issue number9
DOIs
Publication statusPublished - Sep 2002

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Keywords

  • Hypertension
  • Leptin
  • Obesity
  • Transforming growth factor-β

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Porreca, E., Di Febbo, C., Vitacolonna, E., Baccante, G., Di Castelnuovo, A., Angelini, A., Febo, F., Di Nisio, M., & Cuccurullo, F. (2002). Transforming growth factor-β1 levels in hypertensive patients: Association with body mass index and leptin. American Journal of Hypertension, 15(9), 759-765. https://doi.org/10.1016/S0895-7061(02)02978-3