Long-term effects of dietary sodium intake on cytokines and neurohormonal activation in patients with recently compensated congestive heart failure
Authors: Gaspare Parrinello
Daniele Torres
Manuela Mezzero
Pietro Di Pasquale
Giuseppe Licata
Salvatore Paterna
Marco Giammanco
Sergio Fasullo
Journal: Journal of cardiac failure (2009)
Discipline: CLINICAL MEDICINE
Keywords: fluid accumulation; heart failure; sodium diets; cytokines; neurohormones
Affiliations: Department of Internal Medicine, University of Palermo, Italy.

Abstract:  Background: A growing body of evidence suggests that the fluid accumulation plays a key role in the pathophysiology of heart failure (HF) and that the inflammatory and neurohormonal activation contribute strongly to the progression of this disorder. Methods and results: The study evaluated the long-term effects of 2 different sodium diets on cytokines neurohormones, body hydration and clinical outcome in compensated HF outpatients (New York Heart Association Class II). A total of 173 patients (105 males, mean age 72.5+/-7) recently hospitalized for worsening advanced HF and discharged in normal hydration and in clinical compensation were randomized in 2 groups (double blind). In Group 1, 86 patients received a moderate restriction in sodium (120mmol to 2.8g/day) plus oral furosemide (125 to 250mg bid); in Group 2, 87 patients: received a low-sodium diet (80mmol to 1.8g/day) plus oral furosemide (125 to 250mg bid). Both groups were followed for 12 months and the treatment was associated with a drink intake of 1000mL daily. Neurohormonal (brain natriuretic peptide, aldosterone, plasma rennin activity) and cytokines values (tumor necrosis factor-alpha, interleukin-6) were significantly reduced with a significant increase of the anti-inflammatory cytokine interleukin-10 at 12 months in normal, P &lt; .0001) than low-sodium group. The low-sodium diet showed a significant activation of neurohormones and cytokines and worsening the body hydration, whereas moderate sodium restriction maintained dry weigh and improved outcome in the long term. Conclusions: Our results appear to suggest a surprising efficacy of a new strategy to improve the chronic diuretic response by increasing Na intake and limiting fluid intake. This counterintuitive approach underlines the need for a better understanding of factors that regulate sodium and water handling in chronic congestive HF. A larger sample of patients and further studies are required to evaluate whether this is due to the high dose of diuretic used or the low-sodium diet. 

Retracted: No

PubPeer comments:
 https: doi.org 10.1042 CS-20070193_EOC The Editorial Board of Clinical Science would like to issue an Expression of Concern for the paper u201cNormal-sodium diet compared with low-sodium diet in compensated congestive heart failure: is sodium an old enemy or new friend?u201d (by Paterna, Gaspare, Fasullo, Sarullo and Di Pasquale). Subsequent to the publication of this paper in Clinical Science, it became evident that some data were duplicated in a paper published in the Journal of Cardiac Failure (doi 10.1016 j.cardfail.2009.06.002). While the data were first published in Clinical Science and hence is the original source the Editorial Board would like to alert readers to use the data in the paper with caution, given the duplication issue. ,