| 1996 |
Human SLC12A3 (NCC) was cloned and shown to encode a 1021 amino acid protein with 12 transmembrane domains, expressed specifically in the kidney, and selectively inhibited by thiazide diuretics, establishing it as the renal Na-Cl cotransporter. |
cDNA cloning, heterologous expression, protein sequence analysis, fluorescence in situ hybridization |
Genomics |
High |
8812482
|
| 2007 |
SLC12A3 mutations cause Gitelman syndrome through multiple mechanisms: nonsense-mediated mRNA decay of splicing mutants, defective intrinsic transport activity, and absent cell surface expression (trafficking defects), demonstrating functional classes of NCC mutants. |
cDNA analysis, transcript quantification, heterologous expression in Xenopus laevis oocytes, functional transport assays |
Journal of the American Society of Nephrology : JASN |
High |
17329572
|
| 2009 |
NCC expression and phosphorylation at Thr53, Thr58, and Ser71 are increased by dietary NaCl restriction in vivo, and this response requires SGK1, establishing SGK1 as a regulator of NCC phosphorylation in the context of salt intake. |
In vivo mouse studies with SGK1 knockout, phospho-specific antibodies, Western blot |
American journal of physiology. Renal physiology |
High |
19570885
|
| 2009 |
The renal isoform of WNK3 increases NCC expression and activity in Xenopus oocytes via a kinase-dependent, SPAK-independent pathway, while the brain isoform decreases NCC activity in a SPAK-dependent manner; T58A and T58D NCC mutants have normal surface expression but altered transport activity, and both WNK3 isoforms and WNK4 still modulate surface expression of these mutants. |
Heterologous expression in Xenopus oocytes, kinase-dead mutants, 22Na+ uptake assay |
Journal of the American Society of Nephrology : JASN |
High |
19470686
|
| 2010 |
Kidney-specific WNK1 (KS-WNK1) is a negative regulator of NCC in vivo: overexpression reduces surface expression of total and phosphorylated NCC and lowers blood pressure, while targeted deletion of exon 4A increases NCC surface expression and phosphorylation and raises blood pressure. |
Transgenic mouse overexpression and gene-targeted deletion, immunofluorescent staining, in vivo blood pressure measurement |
Human molecular genetics |
High |
21131289
|
| 2010 |
The recurrent nonsense mutation Ser707X in NCC causes Gitelman syndrome primarily through nonsense-mediated mRNA decay, resulting in virtually absent NCC protein; loss of NCC leads to compensatory upregulation of TRPV5/6 (contributing to hypocalciuria) and ROMK1/Maxi-K channels (contributing to hypokalemia). |
Knockin mouse model, RT-PCR, immunohistochemistry, renal phenotyping, electrolyte measurements |
Human mutation |
High |
20848653
|
| 2011 |
Novel NCC missense mutations cause loss of function through distinct classes: class 2 (no transport activity, e.g., Thr392Ile), class 3 (impaired trafficking to plasma membrane, e.g., Asn442Ser, Gln1030Arg), and class 4 (impaired NaCl uptake despite reaching membrane, e.g., Glu121Asp, Pro751Leu, Ser475Cys, Tyr489His). |
Heterologous expression in Xenopus laevis oocytes, 22Na+ uptake assay, surface expression analysis |
European journal of human genetics : EJHG |
High |
22009145
|
| 2012 |
The PI3K/Akt signaling pathway activates the WNK-OSR1/SPAK-NCC phosphorylation cascade in hyperinsulinemic db/db mice; PI3K inhibitors corrected increased NCC phosphorylation, and knock-in mutations disrupting WNK→SPAK/OSR1 signaling completely corrected NCC phosphorylation and elevated blood pressure. |
Knock-in mouse models (SpakT243A and Osr1T185A), PI3K/Akt inhibitor treatment, Western blot for phosphorylated NCC/SPAK/OSR1/Akt, thiazide sensitivity assay |
Hypertension (Dallas, Tex. : 1979) |
High |
22949526
|
| 2012 |
Vasopressin, acting through the V2 receptor and adenylyl cyclase 6 (AC6), mediates phosphorylation of NCC at Thr58 in vivo; AC6 knockout mice lack the vasopressin-induced NCC phosphorylation response. |
AC6 knockout mice, DDAVP (V2 agonist) administration, phospho-specific Western blot |
The American journal of pathology |
High |
23123217
|
| 2013 |
Aldosterone acutely stimulates NCC activity and phosphorylation (without changing total NCC or surface expression) via a pathway requiring the mineralocorticoid receptor, SGK1, and SPAK; gene silencing of SPAK abolished aldosterone's effect on NCC activity. |
Rodent kidney studies, mouse DCT cell line, minipump aldosterone administration, SPAK gene silencing, phospho-specific antibodies, functional transport assay |
American journal of physiology. Renal physiology |
High |
23739593
|
| 2013 |
SPAK-mediated phosphorylation of NCC at T60 (T58 in mouse) is required for NCC protein stability and apical membrane localization; the T58M mutation prevents SPAK/OSR1 phosphorylation, reduces total NCC protein and membrane stability, causes cytosolic mislocalization, and produces Gitelman syndrome phenotype in vivo. Crossing with WNK4 D561A/+ (PHAII) mice demonstrated that phosphorylation-defective NCC corrects the hypertensive phenotype. |
Knock-in mouse model (T58M), MDCK cell expression, immunofluorescence, Western blot, genetic cross with WNK4-PHAII mice |
Journal of the American Society of Nephrology : JASN |
High |
23833262
|
| 2014 |
Raising plasma K+ concentration by intravenous KCl infusion (without K+ ingestion) is sufficient to reduce NCC phosphorylation by ~60% and drive kaliuresis and natriuresis, establishing plasma K+ concentration as the direct signal that inhibits NCC phosphorylation and activity. |
In vivo rat studies with intravenous KCl infusion, phospho-specific Western blot for NCC, SPAK, NKCC2 |
American journal of physiology. Renal physiology |
High |
24598799
|
| 2014 |
Exonic mutations in SLC12A3 can cause Gitelman syndrome by inducing exon skipping through disruption of exonic splicing enhancer sequences; mutations p.A356V and p.M672I cause aberrant splicing in vitro, and p.M672I causes exon 16 exclusion in a patient, producing a nonfunctional NCC without transport activity. |
Bioinformatics ESE scoring, minigene splicing assay, patient mRNA analysis, Xenopus oocyte functional expression |
Journal of the American Society of Nephrology : JASN |
High |
25060058
|
| 2015 |
SPAK is an important but not exclusive mediator of low-K+ diet-induced NCC activation; SPAK knockout mice showed blunted but not completely abolished NCC phosphorylation and expression in response to low-K+ diet, indicating additional low-K+-activated kinases contribute. |
SPAK knockout mice, low-K+ diet, phospho-specific Western blot and immunolocalization |
American journal of physiology. Renal physiology |
High |
25651563
|
| 2016 |
NCC and ENaC (α- and γ-subunits) physically associate in the DCT2 as demonstrated by co-immunoprecipitation, mammalian two-hybrid direct binding assay, FRET, and immunogold EM; inhibition of NCC functionally affects ENaC activity, revealing a novel mode of coordination of distal sodium transport. |
Blue native PAGE, co-immunoprecipitation, mammalian two-hybrid, FRET, immunogold electron microscopy, functional transport assay |
The Biochemical journal |
High |
27422782
|
| 2016 |
The mineralocorticoid receptor (MR) is dispensable for NCC abundance and phosphorylation regulation in the DCT, as MR-negative DCT cells showed no difference in NCC compared to MR-positive cells side-by-side in the same kidney; MR is required for ENaC in the collecting system but not NCC in DCT. |
Mosaic MR-deletion mouse model, immunofluorescence comparing MR-positive and -negative cells in same tissue |
Pflugers Archiv : European journal of physiology |
High |
26898302
|
| 2017 |
Aldosterone promotes increased physical interaction between NCC and αENaC, and this interaction is further enhanced by co-expression of SGK1 (an aldosterone-induced kinase), revealing a mechanism by which aldosterone coordinates distal sodium transport. |
Co-immunoprecipitation, electron microscopy colocalization, SGK1 co-expression experiments |
Scientific reports |
Medium |
28646163
|
| 2018 |
Kidney-specific WNK1 (KS-WNK1) activates NCC and SPAK in Xenopus oocytes; this requires interaction with another WNK kinase (abolished by WNK-WNK interacting domain deletion and WNK inhibitor WNK463). Co-immunoprecipitation showed KS-WNK1 interacts with WNK4 and promotes WNK4 autophosphorylation at Ser335, independent of changes in intracellular Cl-. |
Xenopus oocyte microinjection, 22Na+ uptake, co-immunoprecipitation, WNK inhibitor (WNK463), domain deletion mutagenesis |
American journal of physiology. Renal physiology |
High |
29846116
|
| 2018 |
Calcium-sensing receptor (CaSR) activation increases NCC activity in a WNK4-dependent manner as shown in Xenopus oocytes; in HEK293 cells, calcimimetic R-568 stimulates SPAK phosphorylation only in presence of WNK4 and is blocked by WNK4 inhibitor WNK463; CaSR activation leads to phosphorylation of KLHL3 and WNK4 with increased WNK4 abundance; acute R-568 in mice increases NCC phosphorylation in vivo. |
Xenopus oocyte 22Na+ uptake, HEK293 cell transfection, Western blot, in vivo mouse treatment with calcimimetic |
Journal of the American Society of Nephrology : JASN |
High |
29848507
|
| 2018 |
Plasma K+ concentration is the determining factor regulating NCC activity in γENaC knockout mice; when K+ was eliminated from the diet at time of γENaC deletion, plasma K+ and NCC activity remained normal, establishing plasma K+ as the dominant upstream signal for NCC regulation. |
Nephron-specific γENaC knockout mice, dietary K+ manipulation, NCC phosphorylation assays, electrolyte measurements |
Journal of the American Society of Nephrology : JASN |
High |
29371419
|
| 2019 |
WNK bodies in DCT cells cluster WNK4 and SPAK/OSR1 to promote NCC activation during K+ deficiency; phosphorylated SPAK/OSR1 is present in WNK bodies within 12 h of dietary K+ deprivation; WNK4 is the primary active WNK in WNK bodies; Kir4.1 (basolateral K+ channel) is required for DCT cells to sense plasma K+ and form WNK bodies. |
Mouse dietary manipulation, WNK4-deficient mice, kidney-specific Kir4.1 deletion mice, immunofluorescence, phospho-specific antibodies |
American journal of physiology. Renal physiology |
High |
31736353
|
| 2019 |
Mg2+ restriction downregulates total NCC abundance through NEDD4-2; dietary Mg2+ restriction failed to lower NCC in inducible nephron-specific NEDD4-2 knockout mice; this effect is independent of the NCC-activating kinases SPAK/OSR1. |
Dietary manipulation, inducible nephron-specific NEDD4-2 knockout mice, SPAK/OSR1 double-knockout mice, Western blot |
American journal of physiology. Renal physiology |
High |
31364380
|
| 2019 |
Norepinephrine (NE) activates NCC in rats through an α1-adrenoceptor-gated WNK/SPAK/OxSR1 signaling pathway; α1-adrenoceptor antagonism (but not β-adrenoceptor antagonism) restored dietary Na+-evoked NCC suppression and abolished the salt-sensitive component of hypertension. |
Selective adrenoceptor antagonism in NE-infused rats, Western blot for NCC/SPAK/WNK phosphorylation, in vivo NCC activity (thiazide test), blood pressure telemetry |
American journal of physiology. Renal physiology |
High |
31608673
|
| 2019 |
SLC12A3 (slc12a3) knockdown in zebrafish leads to structural abnormality of the kidney pronephric distal duct, demonstrating a required role in kidney tubule development. |
Zebrafish slc12a3 knockdown (morpholino), morphological analysis at 1-cell stage |
American journal of nephrology |
Low |
25401745
|
| 2014 |
P2Y2 receptor activation by ATP/UTP in mouse DCT cells triggers Ca2+ transients that destabilize NCC mRNA, reducing NCC expression; cytosolic (but not nuclear) parvalbumin overexpression abolishes ATP/UTP-induced NCC mRNA decrease, while the NCC promoter is not regulated by Ca2+ changes, demonstrating post-transcriptional regulation of NCC by cytoplasmic Ca2+. |
siRNA silencing of P2Y2 receptors, cytosolic/nuclear parvalbumin overexpression, luciferase reporter, Ca2+ imaging in mDCT cells |
Pflugers Archiv : European journal of physiology |
High |
24463702
|
| 2021 |
NEDD4-2 mediates the inhibitory effect of high-salt diet on NCC expression and phosphorylation in vivo; kidney-specific NEDD4-2 knockout mice lack high-salt-induced suppression of NCC (total and phospho-NCC), and NEDD4-2 deletion also abolishes high-salt effects on Kir4.1 and ENaC. |
Kidney-specific NEDD4-2 knockout mice, high-salt/low-salt diets, Western blot, patch-clamp electrophysiology, renal clearance experiments |
American journal of physiology. Renal physiology |
High |
33818128
|
| 2022 |
NEDD4-2 ubiquitylates NCC and modulates its plasma membrane levels and protein half-life; Nedd4-2 deletion increases NCC and pNCC levels and elevates NCC plasma membrane abundance; NCC protein half-life is increased; however, Nedd4-2 is not required for K+-induced reductions in NCC abundance in ex vivo kidney tubules. |
NEDD4-2 deletion in MDCKI cells, Nedd4-2 KO mice, ex vivo kidney tubule suspension, ubiquitylation assay, plasma membrane fractionation, protein half-life assay |
Frontiers in physiology |
High |
36160843
|
| 2021 |
Cullin E3 ubiquitin ligases (Cul1, 3, 4, 5) are involved in mediating K+ effects on NCC phosphorylation and abundance; high dietary K+ effects on phosphorylated NCC are attenuated in Cul3 mutant mice; pan-cullin inhibition with MLN4924 attenuated high K+-induced decreases in NCC phosphorylation but eliminated low K+-induced increases. |
CUL3-mutant (CUL3-Het/Δ9) mice, dietary K+ manipulation, MLN4924 (pan-cullin inhibitor) in ex vivo renal tubules, Western blot for neddylated cullins and phospho-NCC |
Cells |
High |
35011657
|
| 2024 |
Cab39 (calcium-binding protein 39) proteins are required for SPAK phosphorylation and trafficking to the apical membrane with NCC; double knockout of Cab39 and Cab39l results in complete absence of NCC phosphorylation and a Gitelman-like phenotype; in Cab39-DKO mice, SPAK/OSR1 is confined to intracellular puncta rather than colocalizing with NCC at the apical membrane. |
Tamoxifen-inducible NCC-driven Cab39 knockout, global Cab39l knockout, double knockout mice, low-K+ diet, Western blot, immunofluorescence, electrolyte measurements |
Hypertension (Dallas, Tex. : 1979) |
High |
38258567
|
| 2022 |
Six frequent SLC12A3 missense mutations (T60M, L215F, D486N, N534K, Q617R, R928C) produce structurally altered NCC protein and significantly reduced thiazide-sensitive 22Na+ uptake in Xenopus oocytes, demonstrating direct loss of transport function. |
Site-directed mutagenesis, Xenopus oocyte expression, 22Na+ uptake assay, I-TASSER protein structure prediction, thiazide test in patients |
Endocrine connections |
High |
34860177
|
| 2024 |
DCT-specific deletion of KS-WNK1 increases WNK4 and long WNK1 (L-WNK1) expression and elevates NCC phosphorylation, indicating KS-WNK1 normally targets WNK4 and L-WNK1 for degradation; in the absence of KS-WNK1, NCC loses sensitivity to low plasma K+ and WNK body formation is absent in the targeted DCT segments. |
DCT-specific KS-WNK1 knockout mice, dietary K+ manipulation, Western blot, immunofluorescence for WNK bodies |
American journal of physiology. Renal physiology |
High |
38961847
|
| 2023 |
CRISPR-Cas9 correction of SLC12A3 mutations in patient-derived iPSCs rescued NCC (NCCT) mRNA and protein expression, and improved kidney organoid maturation, demonstrating that loss of SLC12A3 function is directly responsible for the disease phenotype at the cellular level. |
CRISPR-Cas9 gene correction in patient iPSCs, kidney organoid differentiation, qRT-PCR, immunoblot, immunofluorescence |
International journal of molecular sciences |
Medium |
36769335
|
| 2010 |
Deep intronic mutations in SLC12A3 (c.1670-191C>T in intron 13 and c.2548+253C>T in intron 21) create pseudoexons with premature stop codons, causing defective NCC expression (absent apical NCC in DCT); identified by RNA-based approach from leukocyte mRNA. |
RT-PCR from leukocytes and urine sediments, genomic sequencing, renal biopsy immunohistochemistry |
Clinical journal of the American Society of Nephrology : CJASN |
Medium |
21051746
|