Cited by 458Potassium and Related DisordersIon Transport and Channel RegulationSodium Intake and Health

Potassium modulates electrolyte balance and blood pressure through effects on distal cell voltage and chloride

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Terker, Andrew S., Zhang, Chong, McCormick, James A., Lazelle, Rebecca A., Zhang, Chengbiao, Meermeier, Nicholas P., Siler, Dominic A., Park, Hae J. +6 more·2015·Cell Metabolism

Abstract

Dietary potassium deficiency, common in modern diets, raises blood pressure and enhances salt sensitivity. Potassium homeostasis requires a molecular switch in the distal convoluted tubule (DCT), which fails in familial hyperkalemic hypertension (pseudohypoaldosteronism type 2), activating the thiazide-sensitive NaCl cotransporter, NCC. Here, we show that dietary potassium deficiency activates NCC, even in the setting of high salt intake, thereby causing sodium retention and a rise in blood pressure. The effect is dependent on plasma potassium, which modulates DCT cell membrane voltage and, in turn, intracellular chloride. Low intracellular chloride stimulates WNK kinases to activate NCC, limiting potassium losses, even at the expense of increased blood pressure. These data show that DCT cells, like adrenal cells, sense potassium via membrane voltage. In the DCT, hyperpolarization activates NCC via WNK kinases, whereas in the adrenal gland, it inhibits aldosterone secretion. These effects work in concert to maintain potassium homeostasis.

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Crossref · 10.1016/j.cmet.2014.12.006

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  • WNK1 interacts with chloride ions to alter its conformation, facilitating capture of SGK1, promoting mTORC2-SGK1 interaction and SGK1 phosphorylation while inhibiting WNK1 kinase activity.

    “Additionally, WNK1 interacts with chloride ions (Cl−) to alter its conformation, facilitating the capture of SGK1 (Piala et al., 2014; Terker et al., 2015). This conformational change promotes the interaction between Mammalian Target of Rapamycin Complex 2 (mTORC2) and SGK1 and enhances the phosphorylation of SGK1 while simultaneously inhibiting the kinase activity of WNK1.”

    From Serum/glucocorticoid regulated kinase 1 (SGK1) in neurological disorders: pain or gain (2024) · cites this paper as Terker et al., 2015

    The Introduction and Results section on extracellular potassium and WNK kinases report that chloride binds WNK1 and inhibits its activation, and test mutations at its chloride-binding sites. The cited paper does not describe a chloride-induced conformational change that captures SGK1, promotes mTORC2–SGK1 interaction, or enhances SGK1 phosphorylation. (LLM, conf=0.88)

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Authors
Terker, A. S., Zhang, C., McCormick, J. A., Lazelle, R. A., Zhang, C., Meermeier, N. P., Siler, D. A., Park, H. J., Fu, Y., Cohen, D. M., Weinstein, A. M., Wang, W.-H., Yang, C.-L., & Ellison, D. H.
Affiliations
  • Oregon Health & Science University (US)
  • New York Medical College (US)
Corresponding author
Ellison, David H.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2015-01
Volume
21
Issue
1
Pages
39-50
ISSN
1550-4131 (ISSN-L)
OpenAlex
W1970486445
Cited by
457
References
44
Citations by year
2026: 35 · 2025: 23 · 2024: 38 · 2023: 40 · 2022: 53 · 2021: 38 · 2020: 38 · 2019: 42 · 2018: 41 · 2017: 47 · 2016: 38 · 2015: 24
FWCI
39.60
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • U.S. Department of Veterans Affairs (I01BX002228)
  • National Institute of General Medical Sciences (T32GM071338)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-51496, DK 54983, DK098141, R56DK054983, DK-29857, R01DK029857, R01DK054983, T32DK067864, R01DK051496, R01DK098141)
  • National Center for Research Resources (S10RR023432)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Potassium and Related Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion Transport and Channel Regulation
  • Health Sciences › Nursing › Nutrition and Dietetics › Sodium Intake and Health
Keywords
distal convoluted tubule, thiazide-sensitive NaCl cotransporter, NCC, WNK kinases, membrane hyperpolarization, intracellular chloride, potassium homeostasis, blood pressure, salt sensitivity, sodium retention, aldosterone secretion, electrolyte balance
MeSH terms
WNK Lysine-Deficient Protein Kinase 1, Kcnj10 Channel, Animals, Blood Pressure, Cell Line, Chlorides, Electrolytes, Humans, Kidney Tubules, Distal, Membrane Potentials, Mice, Inbred BALB C, Mice, Inbred C57BL, Potassium, Pseudohypoaldosteronism, Minor Histocompatibility Antigens, Protein Serine-Threonine Kinases, Potassium, Dietary, Sodium Chloride, Dietary, Mice, Knockout, Potassium Channels, Inwardly Rectifying, Mice, Solute Carrier Family 12, Member 3

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