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https://www.readbyqxmd.com/read/29897280/dual-gain-and-loss-of-cullin-3-function-mediates-familial-hyperkalemic-hypertension
#1
Ryan J Cornelius, Chong Zhang, Kayla J Erspamer, Larry N Agbor, Curt D Sigmund, Jeffrey D Singer, Chao-Ling Yang, David H Ellison
Familial hyperkalemic hypertension is caused by mutations in WNK kinases, or in proteins that mediate their degradation, KLHL3 and cullin 3 (Cul3). While the mechanisms by which WNK and KLHL3 mutations cause the disease are now clear, the effects of the disease-causing Cul3Δ403-459 mutation remain controversial. Possible mechanisms including hyperneddylation, altered ubiquitin ligase activity, decreased association with the COP9 signalosome (CSN), and increased association with and degradation of KLHL3 have all been postulated...
June 13, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29869755/decreased-klhl3-expression-is-involved-in-the-pathogenesis-of-pseudohypoaldosteronism-type-ii-caused-by-cullin-3-mutation-in-vivo
#2
Sayaka Yoshida, Yuya Araki, Takayasu Mori, Emi Sasaki, Yuri Kasagi, Kiyoshi Isobe, Koichiro Susa, Yuichi Inoue, Pascale Bomont, Tomokazu Okado, Tatemitsu Rai, Shinichi Uchida, Eisei Sohara
BACKGROUND: Pseudohypoaldosteronism type II (PHAII) is a hereditary hypertensive disease caused by mutations in four genes: WNK1, WNK4, Kelch-like3 (KLHL3), and cullin3 (CUL3). Recently, it was revealed that CUL3-KLHL3 E3 ligase complex ubiquitinates WNK1 and WNK4, leading to their degradation, and that a common pathogenesis of PHAII is defective WNK degradation due to CUL3-KLHL3 E3 ligase complex impairment. PHAII-causing CUL3 mutations mediate exon9 skipping, producing a CUL3 protein with a 57-amino acid deletion (Δ403-459)...
June 5, 2018: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29848507/the-calcium-sensing-receptor-increases-activity-of-the-renal-ncc-through-the-wnk4-spak-pathway
#3
Silvana Bazúa-Valenti, Lorena Rojas-Vega, María Castañeda-Bueno, Jonatan Barrera-Chimal, Rocío Bautista, Luz G Cervantes-Pérez, Norma Vázquez, Consuelo Plata, Adrián R Murillo-de-Ozores, Lorenza González-Mariscal, David H Ellison, Daniela Riccardi, Norma A Bobadilla, Gerardo Gamba
Background Hypercalciuria can result from activation of the basolateral calcium-sensing receptor (CaSR), which in the thick ascending limb of Henle's loop controls Ca2+ excretion and NaCl reabsorption in response to extracellular Ca2+ However, the function of CaSR in the regulation of NaCl reabsorption in the distal convoluted tubule (DCT) is unknown. We hypothesized that CaSR in this location is involved in activating the thiazide-sensitive NaCl cotransporter (NCC) to prevent NaCl loss. Methods We used a combination of in vitro and in vivo models to examine the effects of CaSR on NCC activity...
May 30, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29511623/a-novel-mutation-in-exon-9-of-cullin-3-gene-contributes-to-aberrant-splicing-in-pseudohypoaldosteronism-type-ii
#4
Leping Shao, Li Cui, Jingru Lu, Yanhua Lang, Irene Bottillo, Xiangzhong Zhao
Pseudohypoaldosteronism type II (PHAII) is a rare renal tubular disease that is inherited in an autosomal dominant manner. Mutations in four genes ( WNK1 , WNK4 , CUL3, and KLHL3 ) have been identified to be responsible for this disease. Cullin 3 (CUL3) and KLHL3 are subunits of Cullin-RING E3 ubiquitin ligase complexes, and the serine-threonine kinases WNK1 and WNK4 are substrates of this ubiquitin ligase. For CUL3 , all mutations associated with PHAII exclusively lead to exon 9 skipping. In this study, we identified a Chinese PHAII kindred caused by a novel synonymous mutation (c...
March 2018: FEBS Open Bio
https://www.readbyqxmd.com/read/29482694/pseudohypoaldosteronism-type-ii-a-young-girl-presented-with-hypertension-hyperkalemia-and-metabolic-acidosis
#5
Gul Hassan Sethar, Aisha Almoghawi, Nargis Khan, Wehad Altourah, Najat Mohammed Ashour
Pseudohypoaldosteronism (PHA) type II is an extremely rare disorder which presents with hypertension, hyperkalemia, and normal anion gap metabolic acidosis. PHA II is also known as familial hyperkalemic hypertension, Gordon syndrome, and chloride shunt syndrome. PHA II is an autosomal dominant disorder and is caused by mutation in WNK1, WNK4, CULLIN3, KLHL3, OSR, SPAK gene. The expression of these proteins is limited to the distal convoluted tube and collecting duct of the kidney. PHA II usually responds to salt restriction and thiazide diuretics...
March 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29381699/novel-genetic-polymorphisms-associated-with-severe-malaria-and-under-selective-pressure-in-north-eastern-tanzania
#6
Matt Ravenhall, Susana Campino, Nuno Sepúlveda, Alphaxard Manjurano, Behzad Nadjm, George Mtove, Hannah Wangai, Caroline Maxwell, Raimos Olomi, Hugh Reyburn, Christopher J Drakeley, Eleanor M Riley, Taane G Clark
Significant selection pressure has been exerted on the genomes of human populations exposed to Plasmodium falciparum infection, resulting in the acquisition of mechanisms of resistance against severe malarial disease. Many host genetic factors, including sickle cell trait, have been associated with reduced risk of developing severe malaria, but do not account for all of the observed phenotypic variation. Identification of novel inherited risk factors relies upon high-resolution genome-wide association studies (GWAS)...
January 2018: PLoS Genetics
https://www.readbyqxmd.com/read/28915228/analysis-of-the-genes-involved-in-mendelian-forms-of-low-renin-hypertension-in-chinese-early-onset-hypertensive-patients
#7
Kai Liu, Fang Qin, Xiaolu Sun, Yang Zhang, Jizheng Wang, Yajie Wu, Wenjun Ma, Wei Wang, Xueyi Wu, Ying Qin, Huimin Zhang, Xianliang Zhou, Haiying Wu, Rutai Hui, Yubao Zou, Xiongjing Jiang, Lei Song
BACKGROUND: The study aimed to analyze genes involved in Mendelian forms of low-renin hypertension in Chinese early-onset hypertensive patients. METHODS: A panel of nine genes, namely SCNN1B, SCNN1G, WNK1, WNK4, KLHL3, CUL3, nuclear receptor subfamily 3, group C (NR3C)1, NR3C2, and HSD11B2 were screened by targeted resequencing in 260 Chinese early-onset hypertensive patients. Additionally, exon 13 of both SCNN1B and SCNN1G was sequenced in an independent cohort of 506 Chinese early-onset hypertensive patients...
March 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/28743496/wnk4-is-indispensable-for-the-pathogenesis-of-pseudohypoaldosteronism-type-ii-caused-by-mutant-klhl3
#8
Koichiro Susa, Eisei Sohara, Daiei Takahashi, Tomokazu Okado, Tatemitsu Rai, Shinichi Uchida
WNK-OSR1/SPAK-NCC signaling cascade is important for regulating salt balance and blood pressure. Activation of WNK-OSR1/SPAK-NaCl cotransporter (NCC) cascade increases sodium reabsorption in the kidney, leading to pseudohypoaldosteronism type II (PHA II) characterized by salt-sensitive hypertension and hyperkalemia. It has been previously demonstrated that the amount of phosphorylated and total NCC markedly decreased in WNK4-/- mice, indicating that WNK4 plays a major role for activation of OSR1/SPAK-NCC signaling...
September 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28656378/comparative-transcriptomic-analysis-identifies-evolutionarily-conserved-gene-products-in-the-vertebrate-renal-distal-convoluted-tubule
#9
Yuya Sugano, Chiara Cianciolo Cosentino, Dominique Loffing-Cueni, Stephan C F Neuhauss, Johannes Loffing
Understanding the molecular basis of the complex regulatory networks controlling renal ion transports is of major physiological and clinical importance. In this study, we aimed to identify evolutionarily conserved critical players in the function of the renal distal convoluted tubule (DCT) by a comparative transcriptomic approach. We generated a transgenic zebrafish line with expression of the red fluorescent mCherry protein under the control of the zebrafish DCT-specific promoter of the thiazide-sensitive NaCl cotransporter (NCC)...
August 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28511177/familial-hyperkalemia-and-hypertension-fhht-and-klhl3-description-of-a-family-with-a-new-recessive-mutation-s553l-compared-to-a-family-with-a-dominant-mutation-q309r-with-analysis-of-urinary-sodium-chloride-cotransporter
#10
Orit Kliuk-Ben Bassat, Vered Carmon, Aaron Hanukoglu, Liat Ganon, Eias Massalha, Eliezer J Holtzman, Zvi Farfel, Haim Mayan
BACKGROUND: Familial hyperkalemia and hypertension (FHHt) is an inherited disorder manifested by hyperkalemia and hypertension. The following four causative genes were identified: WNK1, WNK4, CUL3, and KLHL3. For the first 3 genes, inheritance is autosomal dominant. For KLHL3, inheritance is mostly dominant. A few cases with autosomal recessive disease were described. The mechanism of these 2 modes of inheritance is not clear. In the recessive form, the phenotype of heterozygotes is not well described...
2017: Nephron
https://www.readbyqxmd.com/read/28414128/impaired-degradation-of-medullary-wnk4-in-the-kidneys-of-klhl2-knockout-mice
#11
Yuri Kasagi, Daiei Takahashi, Tomomi Aida, Hidenori Nishida, Naohiro Nomura, Moko Zeniya, Takayasu Mori, Emi Sasaki, Fumiaki Ando, Tatemitsu Rai, Shinichi Uchida, Eisei Sohara
Mutations in the with-no-lysine kinase 1 (WNK1), WNK4, Kelch-like 3 (KLHL3), and Cullin3 (CUL3) genes were identified as being responsible for hereditary hypertensive disease pseudohypoaldosteronism type II (PHAII). Normally, the KLHL3/CUL3 ubiquitin ligase complex degrades WNKs. In PHAII, the loss of interaction between KLHL3 and WNK4 increases levels of WNKs because of impaired ubiquitination, leading to abnormal over-activation of the WNK-OSR1/SPAK-NCC cascade in the kidney's distal convoluted tubules (DCT)...
May 27, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28315668/cmybp-c-was-decreased-via-klhl3-mediated-proteasomal-degradation-in-congenital-heart-diseases
#12
Leitong Wang, Guangrui Lai, Guoming Chu, Xiaoyan Liang, Yanyan Zhao
Cardiac myosin binding protein C (cMyBP-C) is a cardiac structural and regulatory protein; mutations of cMyBP-C are frequently associated with hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM). Cardiac special transcription factors may regulate the expression of cMyBP-C. However, the role of cMyBP-C in congenital heart diseases (CHD) remains poorly understood. In the current study, western blotting and the MRM approach showed that cMyBP-C expression was significantly reduced in fetuses with CHD compared to those without...
June 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28222034/three-cases-of-gordon-syndrome-with-dominant-klhl3-mutations
#13
Ji Soo Park, Eujin Park, Hye Sun Hyun, Yo Han Ahn, Hee Gyung Kang, Il-Soo Ha, Hae Il Cheong
BACKGROUND: Gordon syndrome (GS) is a rare form of monogenic hypertension characterized by low renin hypertension, hyperkalemia, hyperchloremic metabolic acidosis, and normal glomerular filtration rate. To date, four genes causing GS have been identified as: WNK1, WNK4, CUL3, and KLHL3. CASE PRESENTATION: We report three cases of GS in two families. All patients presented with typical clinical features of GS and had a known dominant KLHL3 mutation. Oral thiazide treatment with low salt diet resulted in normalization of blood pressure and serum electrolytes in all three cases...
March 1, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28178566/wnk-kinase-signaling-in-ion-homeostasis-and-human-disease
#14
REVIEW
Masoud Shekarabi, Jinwei Zhang, Arjun R Khanna, David H Ellison, Eric Delpire, Kristopher T Kahle
WNK kinases, along with their upstream regulators (CUL3/KLHL3) and downstream targets (the SPAK/OSR1 kinases and the cation-Cl- cotransporters [CCCs]), comprise a signaling cascade essential for ion homeostasis in the kidney and nervous system. Recent work has furthered our understanding of the WNKs in epithelial transport, cell volume homeostasis, and GABA signaling, and uncovered novel roles for this pathway in immune cell function and cell proliferation.
February 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28052936/klhl3-knockout-mice-reveal-the-physiological-role-of-klhl3-and-the-pathophysiology-of-pseudohypoaldosteronism-type-ii-caused-by-mutant-klhl3
#15
Emi Sasaki, Koichiro Susa, Takayasu Mori, Kiyoshi Isobe, Yuya Araki, Yuichi Inoue, Yuki Yoshizaki, Fumiaki Ando, Yutaro Mori, Shintaro Mandai, Moko Zeniya, Daiei Takahashi, Naohiro Nomura, Tatemitsu Rai, Shinichi Uchida, Eisei Sohara
Mutations in the with-no-lysine kinase 1 (WNK1), WNK4, kelch-like 3 (KLHL3), and cullin3 (CUL3) genes are known to cause the hereditary disease pseudohypoaldosteronism type II (PHAII). It was recently demonstrated that this results from the defective degradation of WNK1 and WNK4 by the KLHL3/CUL3 ubiquitin ligase complex. However, the other physiological in vivo roles of KLHL3 remain unclear. Therefore, here we generated KLHL3(-/-) mice that expressed β-galactosidase (β-Gal) under the control of the endogenous KLHL3 promoter...
April 1, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27983989/potassium-depletion-stimulates-na-cl-cotransporter-via-phosphorylation-and-inactivation-of-the-ubiquitin-ligase-kelch-like-3
#16
Kenichi Ishizawa, Ning Xu, Johannes Loffing, Richard P Lifton, Toshiro Fujita, Shunya Uchida, Shigeru Shibata
Kelch-like 3 (KLHL3) is a component of an E3 ubiquitin ligase complex that regulates blood pressure by targeting With-No-Lysine (WNK) kinases for degradation. Mutations in KLHL3 cause constitutively increased renal salt reabsorption and impaired K(+) secretion, resulting in hypertension and hyperkalemia. Although clinical studies have shown that dietary K(+) intake affects blood pressure, the mechanisms have been obscure. In this study, we demonstrate that the KLHL3 ubiquitin ligase complex is involved in the low-K(+)-mediated activation of Na-Cl cotransporter (NCC) in the kidney...
October 28, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27942049/potassium-depletion-stimulates-na-cl-cotransporter-via-phosphorylation-and-inactivation-of-the-ubiquitin-ligase-kelch-like-3
#17
Kenichi Ishizawa, Ning Xu, Johannes Loffing, Richard P Lifton, Toshiro Fujita, Shunya Uchida, Shigeru Shibata
Kelch-like 3 (KLHL3) is a component of an E3 ubiquitin ligase complex that regulates blood pressure by targeting With-No-Lysine (WNK) kinases for degradation. Mutations in KLHL3 cause constitutively increased renal salt reabsorption and impaired K+ secretion, resulting in hypertension and hyperkalemia. Although clinical studies have shown that dietary K+ intake affects blood pressure, the mechanisms have been obscure. In this study, we demonstrate that the KLHL3 ubiquitin ligase complex is involved in the low-K+ -mediated activation of Na-Cl cotransporter (NCC) in the kidney...
November 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27878608/claudins-in-barrier-and-transport-function-the-kidney
#18
REVIEW
Yongfeng Gong, Jianghui Hou
Claudins are discovered to be key players in renal epithelial physiology. They are involved in developmental, physiological, and pathophysiological differentiation. In the glomerular podocytes, claudin-1 is an important determinant of cell junction fate. In the proximal tubule, claudin-2 plays important roles in paracellular salt reabsorption. In the thick ascending limb, claudin-14, -16, and -19 regulate the paracellular reabsorption of calcium and magnesium. Recessive mutations in claudin-16 or -19 cause an inherited calcium and magnesium losing disease...
January 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27780982/a-patient-with-pseudohypoaldosteronism-type-ii-complicated-by-congenital-hypopituitarism-carrying-a-klhl3-mutation
#19
Marie Mitani, Munehiro Furuichi, Satoshi Narumi, Tomonobu Hasegawa, Motoko Chiga, Shinichi Uchida, Seiji Sato
Pseudohypoaldosteronism type II (PHA II) is a renal tubular disease that causes hyperkalemia, hypertension, and metabolic acidosis. Mutations in four genes (WNK4, WNK1, KLHL3, and CUL3) are known to cause PHA II. We report a patient with PHA II carrying a KLHL3 mutation, who also had congenital hypopituitarism. The patient, a 3-yr-old boy, experienced loss of consciousness at age 10 mo. He exhibited growth failure, hypertension, hyperkalemia, and metabolic acidosis. We diagnosed him as having PHA II because he had low plasma renin activity with normal plasma aldosterone level and a low transtubular potassium gradient...
October 2016: Clinical Pediatric Endocrinology: Case Reports and Clinical Investigations: Official Journal of the Japanese Society for Pediatric Endocrinology
https://www.readbyqxmd.com/read/27727489/phosphorylation-of-klhl3-at-serine-433-impairs-its-interaction-with-the-acidic-motif-of-wnk4-a-molecular-dynamics-study
#20
Lingyun Wang, Ji-Bin Peng
Interaction between the acidic motif (AM) of protein kinase WNK4 and the Kelch domain of KLHL3 are involved in the pathogenesis of pseudohypoaldosteronism type II, a hereditary form of hypertension. This interaction is disrupted by some disease-causing mutations in either WNK4 or KLHL3, or by angiotensin II- and insulin-induced phosphorylation of KLHL3 at serine 433, which is also a site frequently mutated in patients. However, the mechanism by which this phosphorylation disrupts the interaction is unclear...
February 2017: Protein Science: a Publication of the Protein Society
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