Abstract
To estimate the associations between dysnatraemia and inflammatory marker [including interleukin-6 (IL-6)], and tissue remodelling marker [matrix metalloproteinase (MMP)-9 and tissue inhibitor of MMP (TIMP)-1], the pulmonary capillary wedge pressure (PCWP), mean pulmonary artery pressure (PAP), and left ventricular end-diastolic pressure (EDP), and the prognostic relevance in patients with heart failure. The serum sodium level and circulating levels of IL-6, MMP-9, and TIMP-1 were measured in 173 heart failure patients. Dual heart catheterisation was performed to measure PCWP, mean PAP, and EDP. All-cause mortality was assessed during the follow-up period (mean 88 ± 49 months). Restricted cubic spline (RCS) regression showed a U-shaped association of serum sodium level with TIMP-1, with the lowest values in the 138–140 mmol/L range (P for effect = 0.042, P for non-linearity = 0.017). IL-6 and MMP-9 levels showed non-significant associations with serum sodium level. U-shaped associations of serum sodium level with PCWP (P for effect = 0.004, P for non-linearity = 0.001) and mean PAP (P for effect = 0.042, P for non-linearity = 0.017) were found with the RCS regression model. The random forest model revealed that TIMP-1, MMP-9, and IL-6 were important predictors for serum sodium levels. Restricted cubic spline Cox regressions demonstrated that TIMP-1 levels indicated a U-shaped, concaved, non-linear association with all-cause mortality (P for effect = 0.011, P for non-linearity = 0.022). Dysnatraemia is an index of TIMP-1 aggravation and elevated PCWP, mean PAP; hence, it is associated with worsening all-cause mortality.
Clinical Trial Registration: UMIN000023840.
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The data underlying this article cannot be shared publicly due to the privacy of individuals that participated in the study. The data will be shared on reasonable request to the corresponding author. The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors thank the Mses. Hiromi Nishimura, Yumie Yasusaki, Motoko Oku, Mari Kurata, and Yoshiko Kurose for providing excellent technical assistance. We would like to thank Editage (http://www.editage.com) for English language editing. The first author would also like to express his gratitude to his wife and daughter for their moral support and constant encouragement.
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This work was partially supported by a research grant from the University of Fukui.
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Morishita, T., Uzui, H., Hisazaki, K. et al. Relationships between sodium levels, haemodynamics and metalloproteinases in heart failure patients. Heart Vessels 37, 986–993 (2022). https://doi.org/10.1007/s00380-021-02004-9
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DOI: https://doi.org/10.1007/s00380-021-02004-9