Renal Denervation Reduces Monocyte Activation and Monocyte-Platelet Aggregate Formation: An Anti-Inflammatory Effect Relevant for Cardiovascular Risk

Maria T K Zaldivia, Jennifer Rivera, Dagmara Hering, Petra Marusic, Yusuke Sata, Bock Lim, Nina Eikelis, Rebecca Lee, Gavin W. Lambert, Murray D. Esler, Nay M. Htun, Jacqueline Duval, Louise Hammond, Steffen U. Eisenhardt, Ulrike Flierl, Markus P. Schlaich, Karlheinz Peter

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    Abstract

    Overactivation of renal sympathetic nervous system and low-grade systemic inflammation are common features of hypertension. Renal denervation (RDN) reduces sympathetic activity in patients with resistant hypertension. However, its effect on systemic inflammation has not been examined. We prospectively investigated the effect of RDN on monocyte activation and inflammation in patients with uncontrolled hypertension scheduled for RDN. Ambulatory blood pressure, monocyte, and monocyte subset activation and inflammatory markers were assessed at baseline, 3 months, and 6 months after procedure in 42 patients. RDN significantly lowered blood pressure at 3 months (150.5±11.2/81.0±11.2 mm Hg to 144.7±11.8/77.9±11.0 mm Hg), which was sustained at 6 months (144.7±13.8/78.6±11.0 mm Hg). Activation status of monocytes significantly decreased at 3 months (P<0.01) and 6 months (P<0.01) after the procedure. In particular, classical monocyte activation was reduced at 6 months (P<0.05). Similarly, we observed a reduction of several inflammatory markers, including monocyte-platelet aggregates (3 months, P<0.01), plasma monocyte chemoattractant protein-1 levels (3 months, P<0.0001; 6 months, P<0.05), interleukin-1β (3 months, P<0.05; 6 months, P<0.05), tumor necrosis factor-α (3 months, P<0.01; 6 months, P<0.05), and interleukin-12 (3 months, P<0.01; 6 months, P<0.05). A positive correlation was observed between muscle sympathetic nerve activity and monocyte activation before and after the procedure. These results indicate that inhibition of sympathetic activity via RDN is associated with a reduction of monocyte activation and other inflammatory markers in hypertensive patients. These findings point to a direct interaction between the inflammatory and sympathetic nervous system, which is of central relevance for the understanding of beneficial cardiovascular effects of RDN.

    Original languageEnglish
    Pages (from-to)323-331
    Number of pages9
    JournalHypertension
    Volume69
    Issue number2
    DOIs
    Publication statusPublished - 1 Feb 2017

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