Novel Mechanism for Buffering Dietary Salt in Humans

  • Viknesh Selvarajah
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Kaisa M. Mäki-Petäjä
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Liliana Pedro
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Sylvaine F.A. Bruggraber
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Keith Burling
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Anna K. Goodhart
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Morris J. Brown
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Carmel M. McEniery
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
  • Ian B. Wilkinson
    From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).

書誌事項

タイトル別名
  • Effects of Salt Loading on Skin Sodium, Vascular Endothelial Growth Factor C, and Blood Pressure

抄録

<jats:p> High dietary sodium intake triggers increased blood pressure (BP). Animal studies show that dietary salt loading results in dermal Na <jats:sup>+</jats:sup> accumulation and lymphangiogenesis mediated by VEGF-C (vascular endothelial growth factor C), both attenuating the rise in BP. Our objective was to determine whether these mechanisms function in humans. We assessed skin electrolytes, BP, and plasma VEGF-C in 48 healthy participants randomized to placebo (70 mmol sodium/d) and slow sodium (200 mmol/d) for 7 days. Skin Na <jats:sup>+</jats:sup> and K <jats:sup>+</jats:sup> concentrations were measured in mg/g of wet tissue and expressed as the ratio Na <jats:sup>+</jats:sup> :K <jats:sup>+</jats:sup> to correct for variability in sample hydration. Skin Na <jats:sup>+</jats:sup> :K <jats:sup>+</jats:sup> increased between placebo and slow sodium phases (2.91±0.08 versus 3.12±0.09; <jats:italic>P</jats:italic> =0.01). In post hoc analysis, there was a suggestion of a sex-specific effect, with a significant increase in skin Na <jats:sup>+</jats:sup> :K <jats:sup>+</jats:sup> in men (2.59±0.09 versus 2.88±0.12; <jats:italic>P</jats:italic> =0.008) but not women (3.23±0.10 versus 3.36±0.12; <jats:italic>P</jats:italic> =0.31). Women showed a significant increase in 24-hour mean BP with salt loading (93±1 versus 91±1 mm Hg; <jats:italic>P</jats:italic> <0.001) while men did not (96±2 versus 96±2 mm Hg; <jats:italic>P</jats:italic> =0.91). Skin Na <jats:sup>+</jats:sup> :K <jats:sup>+</jats:sup> correlated with BP, stroke volume, and peripheral vascular resistance in men but not in women. No change was noted in plasma VEGF-C. These findings suggest that the skin may buffer dietary Na <jats:sup>+</jats:sup> , reducing the hemodynamic consequences of increased salt, and this may be influenced by sex. </jats:p>

収録刊行物

  • Hypertension

    Hypertension 70 (5), 930-937, 2017-11

    Ovid Technologies (Wolters Kluwer Health)

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