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https://www.readbyqxmd.com/read/27911840/multistep-regulation-of-autophagy-by-wnk1
#1
Sachith Gallolu Kankanamalage, A-Young Lee, Chonlarat Wichaidit, Andres Lorente-Rodriguez, Akansha M Shah, Steve Stippec, Angelique W Whitehurst, Melanie H Cobb
The with-no-lysine (K) (WNK) kinases are an atypical family of protein kinases that regulate ion transport across cell membranes. Mutations that result in their overexpression cause hypertension-related disorders in humans. Of the four mammalian WNKs, only WNK1 is expressed throughout the body. We report that WNK1 inhibits autophagy, an intracellular degradation pathway implicated in several human diseases. Using small-interfering RNA-mediated WNK1 knockdown, we show autophagosome formation and autophagic flux are accelerated...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27811182/leveraging-unique-structural-characteristics-of-wnk-kinases-to-achieve-therapeutic-inhibition
#2
REVIEW
Jinwei Zhang, Xianming Deng, Kristopher T Kahle
The with-no-lysine (K) WNK kinases are master regulators of the Na(+)-(K(+))-Cl(-) cotransporters, including the renal-specific NCC and NKCC2 cotransporters. The discovery of WNK463, an orally bioavailable pan-WNK kinase inhibitor that exploits unique structural properties of the WNK catalytic domain to achieve high affinity and kinase selectivity, illustrates a strategy of leveraging distinct kinase features to develop specific inhibitors and validates the genetic predictions of the in vivo pharmacology of WNK inhibition...
October 18, 2016: Science Signaling
https://www.readbyqxmd.com/read/27798271/wnk-cab39-nkcc1-signaling-increases-the-susceptibility-to-ischemic-brain-damage-in-hypertensive-rats
#3
Mohammad Iqbal H Bhuiyan, Shanshan Song, Hui Yuan, Gulnaz Begum, Julia Kofler, Kristopher T Kahle, Sung-Sen Yang, Shih-Hua Lin, Seth L Alper, Arohan R Subramanya, Dandan Sun
With-no-lysine kinase (WNK) and Na(+)-K(+)-2Cl(-) cotransporter 1 (NKCC1) are involved in the pathogenesis of hypertension. In this study, we investigated the WNK-NKCC1 signaling pathway in spontaneously hypertensive rats (SHR) and their associated susceptibility to stroke injury. Basal NKCC1 protein levels were higher in SHR than in normotensive Wistar Kyoto (WKY) rat brains. After inducing ischemic stroke, adult male WKY and SHR received either saline or NKCC1 inhibitor bumetanide (10 mg/kg/day, i.p.) starting at 3-h post-reperfusion...
October 26, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27753931/os-05-06-in-primary-aldosteronism-mineralocorticoids-and-potassium-influence-abundance-of-the-thiazide-sensitive-sodium-chloride-cotransporter
#4
Wolley Mj, Wu A, Xu S, Gordon Rd, Fenton Ra, Stowasser M
BACKGROUND: Distal tubular sodium retention is a potent driver of hypertension, with the thiazide sensitive sodium-chloride cotransporter (NCC) a key player. The upstream modulators of NCC are unclear, but recent evidence has revealed the kinases 'with-no-lysine kinase 4' (WNK4) and 'STE20/SPS1-related, proline alanine-rich kinase' (SPAK) to be involved. The wider role of mineralocorticoids is poorly understood, but animal models implicate aldosterone as a potent regulator, possibly via effects on plasma potassium...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27712055/discovery-and-characterization-of-allosteric-wnk-kinase-inhibitors
#5
Ken Yamada, Ji-Hu Zhang, Xiaoling Xie, Juergen Reinhardt, Amy Qiongshu Xie, Daniel LaSala, Darcy Kohls, David Yowe, Debra Burdick, Hajime Yoshisue, Hiromichi Wakai, Isabel Schmidt, Jason Gunawan, Kayo Yasoshima, Q Kimberley Yue, Mitsunori Kato, Muneto Mogi, Neeraja Idamakanti, Natasha Kreder, Peter Drueckes, Pramod Pandey, Toshio Kawanami, Waanjeng Huang, Yukiko I Yagi, Zhan Deng, Hyi-Man Park
Protein kinases are known for their highly conserved adenosine triphosphate (ATP)-binding site, rendering the discovery of selective inhibitors a major challenge. In theory, allosteric inhibitors can achieve high selectivity by targeting less conserved regions of the kinases, often with an added benefit of retaining efficacy under high physiological ATP concentration. Although often overlooked in favor of ATP-site directed approaches, performing a screen at high ATP concentration and/or stringent hit triaging with high ATP concentration offer conceptually simple methods of identifying allosteric inhibitors...
October 7, 2016: ACS Chemical Biology
https://www.readbyqxmd.com/read/27643324/os-05-06-in-primary-aldosteronism-mineralocorticoids-and-potassium-influence-abundance-of-the-thiazide-sensitive-sodium-chloride-cotransporter
#6
Wolley Mj, Wu A, Xu S, Gordon Rd, Fenton Ra, Stowasser M
BACKGROUND: Distal tubular sodium retention is a potent driver of hypertension, with the thiazide sensitive sodium-chloride cotransporter (NCC) a key player. The upstream modulators of NCC are unclear, but recent evidence has revealed the kinases 'with-no-lysine kinase 4' (WNK4) and 'STE20/SPS1-related, proline alanine-rich kinase' (SPAK) to be involved. The wider role of mineralocorticoids is poorly understood, but animal models implicate aldosterone as a potent regulator, possibly via effects on plasma potassium...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27622885/fgf23-klotho-signaling-axis-in-the-kidney
#7
Reinhold G Erben, Olena Andrukhova
Fibroblast growth factor-23 (FGF23) is a bone-derived hormone protecting against the potentially deleterious effects of hyperphosphatemia by suppression of phosphate reabsorption and of active vitamin D hormone synthesis in the kidney. The kidney is one of the main target organs of FGF23 signaling. The purpose of this review is to highlight the recent advances in the area of FGF23-Klotho signaling in the kidney. During recent years, it has become clear that FGF23 acts independently on proximal and distal tubular epithelium...
September 10, 2016: Bone
https://www.readbyqxmd.com/read/27595330/small-molecule-wnk-inhibition-regulates-cardiovascular-and-renal-function
#8
Ken Yamada, Hyi-Man Park, Dean F Rigel, Keith DiPetrillo, Erin J Whalen, Anthony Anisowicz, Michael Beil, James Berstler, Cara Emily Brocklehurst, Debra A Burdick, Shari L Caplan, Michael P Capparelli, Guanjing Chen, Wei Chen, Bethany Dale, Lin Deng, Fumin Fu, Norio Hamamatsu, Kouki Harasaki, Tracey Herr, Peter Hoffmann, Qi-Ying Hu, Waan-Jeng Huang, Neeraja Idamakanti, Hidetomo Imase, Yuki Iwaki, Monish Jain, Jey Jeyaseelan, Mitsunori Kato, Virendar K Kaushik, Darcy Kohls, Vidya Kunjathoor, Daniel LaSala, Jongchan Lee, Jing Liu, Yang Luo, Fupeng Ma, Ruowei Mo, Sarah Mowbray, Muneto Mogi, Flavio Ossola, Pramod Pandey, Sejal J Patel, Swetha Raghavan, Bahaa Salem, Yuka H Shanado, Gary M Trakshel, Gordon Turner, Hiromichi Wakai, Chunhua Wang, Stephen Weldon, Jennifer B Wielicki, Xiaoling Xie, Lingfei Xu, Yukiko I Yagi, Kayo Yasoshima, Jianning Yin, David Yowe, Ji-Hu Zhang, Gang Zheng, Lauren Monovich
The With-No-Lysine (K) (WNK) kinases play a critical role in blood pressure regulation and body fluid and electrolyte homeostasis. Herein, we introduce the first orally bioavailable pan-WNK-kinase inhibitor, WNK463, that exploits unique structural features of the WNK kinases for both affinity and kinase selectivity. In rodent models of hypertension, WNK463 affects blood pressure and body fluid and electro-lyte homeostasis, consistent with WNK-kinase-associated physiology and pathophysiology.
November 2016: Nature Chemical Biology
https://www.readbyqxmd.com/read/27322883/the-regulation-of-na-cl-cotransporter-by-with-no-lysine-kinase-4
#9
Eduardo R Argaiz, Gerardo Gamba
PURPOSE OF REVIEW: Abundant evidence supports that the NaCl cotransporter (NCC) activity is tightly regulated by the with-no-lysine (WNK) kinases. Here, we summarize the data regarding NCC regulation by WNKs, with a particular emphasis on WNK4. RECENT FINDINGS: Several studies involving in-vivo and in-vitro models have provided paradoxical data regarding WNK4 regulation of the NCC. Although some studies show that WNK4 can activate the NCC, other equally compelling studies show that WNK4 inhibits the NCC...
September 2016: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27314050/novel-association-of-wnk4-gene-ala589ser-polymorphism-in-essential-hypertension-and-type-2-diabetes-mellitus-in-malaysia
#10
Nooshin Ghodsian, Patimah Ismail, Salma Ahmadloo, Farzad Heidari, Polin Haghvirdizadeh, Sima Ataollahi Eshkoor, Ali Etemad
With-no-lysine (K) Kinase-4 (WNK4) consisted of unique serine and threonine protein kinases, genetically associated with an autosomal dominant form of hypertension. Argumentative consequences have lately arisen on the association of specific single nucleotide polymorphisms of WNK4 gene and essential hypertension (EHT). The aim of this study was to determine the association of Ala589Ser polymorphism of WNK4 gene with essential hypertensive patients in Malaysia. WNK4 gene polymorphism was specified utilizing mutagenically separated polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) method in 320 subjects including 163 cases and 157 controls...
2016: Journal of Diabetes Research
https://www.readbyqxmd.com/read/27170636/with-no-lysine-l-wnk1-isoforms-are-negative-regulators-of-the-k-cl-cotransporters
#11
Adriana Mercado, Paola de Los Heros, Zesergio Melo, María Chávez-Canales, Adrián R Murillo-de-Ozores, Erika Moreno, Silvana Bazúa-Valenti, Norma Vázquez, Juliette Hadchouel, Gerardo Gamba
The K(+)-Cl(-) cotransporters (KCC1-KCC4) encompass a branch of the SLC12 family of electroneutral cation-coupled chloride cotransporters that translocate ions out of the cell to regulate various factors, including cell volume and intracellular chloride concentration, among others. L-WNK1 is an ubiquitously expressed kinase that is activated in response to osmotic stress and intracellular chloride depletion, and it is implicated in two distinct hereditary syndromes: the renal disease pseudohypoaldosteronism type II (PHAII) and the neurological disease hereditary sensory neuropathy 2 (HSN2)...
July 1, 2016: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/27131446/-wnk-ing-at-death-with-no-lysine-wnk-kinases-in-neuropathies-and-neuronal-survival
#12
REVIEW
Bor Luen Tang
Members of With-no-lysine (WNK) family of serine-threonine kinase are key regulators of chloride ion transport in diverse cell types, controlling the activity and the surface expression of cation-chloride (Na(+)/K(+)-Cl(-)) co-transporters. Mutations in WNK1 and WNK4 are linked to a hereditary form of hypertension, and WNKs have been extensively investigated pertaining to their roles in renal epithelial ion homeostasis. However, some members of the WNK family and their splice isoforms are also expressed in the mammalian brain, and have been implicated in aspects of hereditary neuropathy as well as neuronal and glial survival...
July 2016: Brain Research Bulletin
https://www.readbyqxmd.com/read/27122539/the-expression-regulation-and-function-of-kir4-1-kcnj10-in-the-mammalian-kidney
#13
REVIEW
Xiao-Tong Su, Wen-Hui Wang
Kir4.1 is an inwardly rectifying potassium (K(+)) channel and is expressed in the brain, inner ear, and kidney. In the kidney, Kir4.1 is expressed in the basolateral membrane of the late thick ascending limb (TAL), the distal convoluted tubule (DCT), and the connecting tubule (CNT)/cortical collecting duct (CCD). It plays a role in K(+) recycling across the basolateral membrane in corresponding nephron segments and in generating negative membrane potential. The renal phenotypes of the loss-function mutations of Kir4...
July 1, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27082544/stk39-and-wnk1-are-potential-hypertension-susceptibility-genes-in-the-belhypgen-cohort
#14
MULTICENTER STUDY
Alexandre Persu, Lucie Evenepoel, Yu Jin, Antonella Mendola, Gérard Ngueta, Wen-Yi Yang, Damien Gruson, Sandrine Horman, Jan A Staessen, Miikka Vikkula
The serine/threonine kinase With-No-Lysine (K) Kinase 1 (WNK1) activates the thiazide-sensitive Na(+)/Cl(-) cotransporter through phosphorylation of STE20/SPS1-related proline/alanine-rich kinase, another serine/threonine kinase encoded by STK39. The aim of this study was to look for association between WNK1 and STK39 gene variants, and blood pressure (BP) and hypertension. Seven hundred seventy-nine Caucasian hypertensive patients (HYP) recruited in 6 academic centers from Belgium, and 906 normotensive (NT) controls were genotyped for 5 single nucleotide polymorphisms-rs3754777, rs6749447, rs35929607 (STK39), rs1468326, and rs765250 (WNK1)-using the Snapshot method...
April 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27076645/the-cul3-klhl3-wnk-spak-osr1-pathway-as-a-target-for-antihypertensive-therapy
#15
Mohammed Z Ferdaus, James A McCormick
Chronic high blood pressure (hypertension) is the most common disease in the Unites States. While several classes of drugs exist to treat it, many patients (up to 10 million Americans) respond poorly to therapy, even when multiple classes are used. Recent evidence suggests that a significant portion of patients will always remain hypertensive despite maximum therapy with the drugs currently available. Therefore, there is a pressing need to develop novel antihypertensive agents. One limitation has been the identification of new targets, a limitation that has been overcome by recent insights into the mechanisms underlying monogenic forms of hypertension...
June 1, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27050278/lung-cancer-derived-galectin-1-contributes-to-cancer-associated-fibroblast-mediated-cancer-progression-and-immune-suppression-through-tdo2-kynurenine-axis
#16
Ya-Ling Hsu, Jen-Yu Hung, Shin-Yi Chiang, Shu-Fang Jian, Cheng-Ying Wu, Yi-Shiuan Lin, Ying-Ming Tsai, Shah-Hwa Chou, Ming-Ju Tsai, Po-Lin Kuo
Communication between cancer cells and their microenvironment plays an important role in cancer development, but the precise mechanisms by which cancer-associated fibroblasts (CAF) impact anti-cancer immunity and cancer progression in lung cancer are poorly understood. Here, we report that lung fibroblasts when activated by lung cancer cells produce tryptophan metabolite kynurenine (Kyn) that inhibits dendritic cells' differentiation and induces cancer growth as well as migration. We identified TDO2 (tryptophan 2,3-dioxygenase) as the main enzyme expressed in fibroblasts capable of tryptophan metabolism...
May 10, 2016: Oncotarget
https://www.readbyqxmd.com/read/27011246/-new-perspective-on-the-role-of-wnk1-and-wnk4-in-the-regulation-of%C3%A2-nacl-reabsorption-and-k-secretion-by-the-distal-nephron
#17
Chloé Rafael, Maria Chavez-Canales, Juliette Hadchouel
The study of Familial Hyperkalemic Hypertension (FHHt), a rare monogenic disease, allowed remarkable advances in the understanding of the mechanisms of regulation of NaCl reabsorption by the distal nephron. FHHt results from mutations in the genes encoding WNK1 and WNK4, two serine-threonine kinases of the WNK (With No lysine [K]) family. The clinical manifestations of FHHt are due, among others, to an increased activity of the Na(+)-Cl(-) cotransporter NCC. Several groups therefore tried to understand how WNK1 and WNK4 could regulate NCC...
March 2016: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/27009339/hypertension-the-missing-wnks
#18
REVIEW
Hashem A Dbouk, Chou-Long Huang, Melanie H Cobb
The With no Lysine [K] (WNK) family of enzymes are central in the regulation of blood pressure. WNKs have been implicated in hereditary hypertension disorders, mainly through control of the activity and levels of ion cotransporters and channels. Actions of WNKs in the kidney have been heavily investigated, and recent studies have provided insight into not only the regulation of these enzymes but also how mutations in WNKs and their interacting partners contribute to hypertensive disorders. Defining the roles of WNKs in the cardiovascular system will provide clues about additional mechanisms by which WNKs can regulate blood pressure...
July 1, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/26662201/cell-specific-regulation-of-l-wnk1-by-dietary-k
#19
Tennille N Webb, Rolando Carrisoza-Gaytan, Nicolas Montalbetti, Anna Rued, Ankita Roy, Alexandra M Socovich, Arohan R Subramanya, Lisa M Satlin, Thomas R Kleyman, Marcelo D Carattino
Flow-induced K(+) secretion in the aldosterone-sensitive distal nephron is mediated by high-conductance Ca(2+)-activated K(+) (BK) channels. Familial hyperkalemic hypertension (pseudohypoaldosteronism type II) is an inherited form of hypertension with decreased K(+) secretion and increased Na(+) reabsorption. This disorder is linked to mutations in genes encoding with-no-lysine kinase 1 (WNK1), WNK4, and Kelch-like 3/Cullin 3, two components of an E3 ubiquitin ligase complex that degrades WNKs. We examined whether the full-length (or "long") form of WNK1 (L-WNK1) affected the expression of BK α-subunits in HEK cells...
January 1, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/26490675/generation-and-analysis-of-knock-in-mice-carrying-pseudohypoaldosteronism-type-ii-causing-mutations-in-the-cullin-3-gene
#20
Yuya Araki, Tatemitsu Rai, Eisei Sohara, Takayasu Mori, Yuichi Inoue, Kiyoshi Isobe, Eriko Kikuchi, Akihito Ohta, Sei Sasaki, Shinichi Uchida
Pseudohypoaldosteronism type II (PHAII) is a hereditary hypertensive disease caused by mutations in four different genes: with-no-lysine kinases (WNK) 1 and 4, Kelch-like family member 3 (KLHL3), and cullin 3 (Cul3). Cul3 and KLHL3 form an E3 ligase complex that ubiquitinates and reduces the expression level of WNK4. PHAII-causing mutations in WNK4 and KLHL3 impair WNK4 ubiquitination. However, the molecular pathogenesis of PHAII caused by Cul3 mutations is unclear. In cultured cells and human leukocytes, PHAII-causing Cul3 mutations result in the skipping of exon 9, producing mutant Cul3 protein lacking 57 amino acids...
2015: Biology Open
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