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Renal tubulopathy

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https://www.readbyqxmd.com/read/28101447/functional-coupling-of-v-atpase-and-clc-5
#1
REVIEW
Nobuhiko Satoh, Masashi Suzuki, Motonobu Nakamura, Atsushi Suzuki, Shoko Horita, George Seki, Kyoji Moriya
Dent's disease is an X-linked renal tubulopathy characterized by low molecular weight proteinuria, hypercalciuria and progressive renal failure. Disease aetiology is associated with mutations in the CLCN5 gene coding for the electrogenic 2Cl(-)/H(+) antiporter chloride channel 5 (CLC-5), which is expressed in the apical endosomes of renal proximal tubules with the vacuolar type H(+)-ATPase (V-ATPase). Initially identified as a member of the CLC family of Cl(-) channels, CLC-5 was presumed to provide Cl(-) shunt into the endosomal lumen to dissipate H(+) accumulation by V-ATPase, thereby facilitating efficient endosomal acidification...
January 6, 2017: World Journal of Nephrology
https://www.readbyqxmd.com/read/28018459/a-novel-mutation-of-clcnkb-in-a-korean-patient-of-mixed-phenotype-of-bartter-gitelman-syndrome
#2
Hee-Won Cho, Sang Taek Lee, Heeyeon Cho, Hae Il Cheong
Bartter syndrome (BS) is an inherited renal tubular disorder characterized by low or normal blood pressure, hypokalemic metabolic alkalosis, and hyperreninemic hyperaldosteronism. Type III BS is caused by loss-of-function mutations in CLCNKB encoding basolateral ClC-Kb. The clinical phenotype of patients with CLCNKB mutations has been known to be highly variable, and cases that are difficult to categorize as type III BS or other hereditary tubulopathies, such as Gitelman syndrome, have been rarely reported...
November 2016: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28008953/glycosuria-and-renal-outcomes-in-patients-with-nondiabetic-advanced-chronic-kidney-disease
#3
Chi-Chih Hung, Hugo You-Hsien Lin, Jia-Jung Lee, Lee Moay Lim, Yi-Wen Chiu, Heng-Pin Chiang, Shang-Jyh Hwang, Hung-Chun Chen
Sodium glucose cotransporter 2 inhibitors have shown a potential for renoprotection beyond blood glucose lowering. Glycosuria in nondiabetic patients with chronic kidney disease (CKD) is sometimes noted. Whether glycosuria in CKD implies a channelopathy or proximal tubulopathy is not known. The consequence of glycosuria in CKD is also not studied. We performed a cross-sectional study for the association between glycosuria and urine electrolyte excretion in 208 nondiabetic patients. Fractional excretion (FE) of glucose >4% was 3...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28007512/-the-complex-phenotype-of-arc-syndrome-a-new-case
#4
A Giraud, F Ramond, C Cremillieux, R Touraine, H Patural, J-L Stephan
ARC syndrome (arthrogryposis - renal dysfunction - cholestasis) is a rare lethal multisystemic autosomal recessive disease. A newborn of consanguineous parents of Algerian descent presented cholestatic jaundice, dehydration, and Fanconi syndrome at 10 days of life. The blood smear showed a very characteristic gray appearance of platelets. A homozygous mutation was evidenced in the VPS33B gene. This gene codes for a protein involved in trafficking of intracellular vesicles. The mutation (c.604-2A>G) present in the heterozygous state in the parents affects an invariant base of the splice acceptor site and to our knowledge has not been reported yet...
December 19, 2016: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/27965825/aminoaciduria-in-the-prediction-of-ifosfamide-induced-tubulopathy-after-childhood-cancer-a-feasibility-study
#5
Jessica E Morgan, Karl McKeever, Kay S Tyerman, Michael Henderson, Susan Picton, Robert S Phillips
BACKGROUND: Ifosfamide, an alkylating agent used widely in the treatment of childhood malignancy, can cause many side effects including a proximal tubulopathy. Studies suggest that aminoaciduria is seen most commonly of all the biochemical abnormalities of ifosfamide-induced tubulopathy. A recent systematic review has found a paucity of data regarding the value of early markers indicating clinically significant tubulopathy. We undertook a pilot study to determine the feasibility of examining whether patients can be risk-stratified on the basis of aminoaciduria for the development of future significant ifosfamide-induced tubulopathy, to allow the evolution of appropriate follow-up strategies...
2016: Pilot and Feasibility Studies
https://www.readbyqxmd.com/read/27957423/crystalline-podocytopathy-and-tubulopathy-without-overt-glomerular-proteinuria-in-a-patient-with-multiple-myeloma
#6
Eun Jeong Lee, Su Yeon Lee, So Young Park, Yonjin Kim, Jae Shin Choi, Mi Jeoung Kim, Ji Hyeon Park, Jung Eun Lee, Ghee Young Kwon, Yoon-Goo Kim
Crystalline nephropathy is a rare yet well-known condition associated with multiple myeloma and other light chain-secreting disorders. Paraproteins that are resistant to proteolysis crystallize within proximal tubular cells and cause light-chain proximal tubulopathy, which presents clinically as Fanconi syndrome. Podocytes are rarely affected, and the crystalline inclusions within podocytes are typically precipitated, yielding significant glomerular proteinuria. Here we report a case of extensive crystalline inclusions primarily within podocytes and proximal tubules that presented only with Fanconi syndrome and renal insufficiency...
December 2016: Kidney Research and Clinical Practice
https://www.readbyqxmd.com/read/27906863/bartter-s-and-gitelman-s-syndrome
#7
Hannsjörg W Seyberth, Stefanie Weber, Martin Kömhoff
PURPOSE OF REVIEW: The clinical presentations of Bartter's syndrome and Gitelman's syndrome will be reviewed including two most recently described hypokalemic salt-losing tubulopathies. By taking the quite heterogeneous presentations and the apparently different pathophysiologies as the basis, the applicability of the physiologic classification has been tested. RECENT FINDINGS: According to the physiologic approach, salt-losing tubulopathies can be divided into two major groups (with completely different tubular defects): first, disorders of the thick ascending limb of Henle's loop (loop disorders); second, disorders of the distal convolute tubule (DCT disorders)...
November 30, 2016: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/27790796/functional-characterization-and-rescue-of-a-deep-intronic-mutation-in-ocrl-gene-responsible-for-lowe-syndrome
#8
John Rendu, Rodrick Montjean, Charles Coutton, Mohnish Suri, Gaetan Chicanne, Anne Petiot, Julie Brocard, Didier Grunwald, France Pietri Rouxel, Bernard Payrastre, Joel Lunardi, Olivier Dorseuil, Isabelle Marty, Julien Fauré
Dent-2 disease and Lowe syndrome are two pathologies caused by mutations in inositol polyphosphate 5-phosphatase OCRL gene. Both conditions share proximal tubulopathy evolving to chronic kidney failure. Lowe syndrome is in addition defined by a bilateral congenital cataract, intellectual disability, and hypotonia. The pathology evolves in two decades to a severe condition with renal complications and a fatal issue. We describe here a proof of principle for a targeted gene therapy on a mutation of the OCRL gene that is associated with Lowe syndrome...
February 2017: Human Mutation
https://www.readbyqxmd.com/read/27784896/cryptic-exon-activation-in-slc12a3-in-gitelman-syndrome
#9
Kandai Nozu, Yoshimi Nozu, Keita Nakanishi, Takao Konomoto, Tomoko Horinouchi, Akemi Shono, Naoya Morisada, Shogo Minamikawa, Tomohiko Yamamura, Junya Fujimura, Koichi Nakanishi, Takeshi Ninchoji, Hiroshi Kaito, Ichiro Morioka, Mariko Taniguchi-Ikeda, Igor Vorechovsky, Kazumoto Iijima
Gitelman syndrome (GS) is an autosomal recessive renal tubulopathy characterized by hypokalemic metabolic alkalosis with hypocalciuria and hypomagnesemia. GS clinical symptoms range from mild weakness to muscular cramps, paralysis or even sudden death as a result of cardiac arrhythmia. GS is caused by loss-of-function mutations in the solute carrier family 12 member 3 (SLC12A3) gene, but molecular mechanisms underlying such a wide range of symptoms are poorly understood. Here we report cryptic exon activation in SLC12A3 intron 12 in a clinically asymptomatic GS, resulting from an intronic mutation c...
October 27, 2016: Journal of Human Genetics
https://www.readbyqxmd.com/read/27777548/crush-syndrome-chez-l%C3%A2-adulte-et-problematique-de-sa-prise-en-charge-a-la-phase-aigu%C3%A3
#10
P F Hemou, H D Sama, P Tchétikè, T Potkar
Le crush syndrome se définit comme l'ensemble des manifestations locales et générales secondaires à une rhabdomyolyse traumatique avec ischémie de grosses masses musculaires par compression prolongée, à l'origine d'un syndrome compartimental ou syndrome des loges. Rarement isolé, il peut passer inaperçu dans les 24 à 48 premières heures de la phase aiguë d'un traumatisme sévère quand les principales préoccupations médicales sont la sauvegarde des fonctions vitales. La souffrance musculaire liée au syndrome compartimental entraîne la libération de myoglobine dans la circulation générale...
December 31, 2015: Annals of Burns and Fire Disasters
https://www.readbyqxmd.com/read/27771652/fanconi-bickel-syndrome-with-hypercalciuria-due-to-glut-2-mutation
#11
Ruchi Shah, Sudha Rao, Ruchi Parikh, Tahir Sophia, Hussain Khalid
BACKGROUND: Fanconi Bickel Syndrome is a rare, autosomal recessive, disorder of carbohydrate metabolism. Presence of hypercalciuria is rare. CASE CHARACTERISTICS: 4.5-years-old boy presented with growth failure, hepatomegaly, rickets, fasting hypoglycemia with postprandial hyperglycemia, fanconi syndrome and hypercalciuria. OUTCOME: A rare mutation in GLUT-2 gene suggestive of Fanconi Bickel Syndrome. MESSAGE: Fanconi Bickel Syndrome may present with hypercalciuria with proximal renal tubulopathy along with fasting hypoglycemia and postprandial hyperglycemia...
September 8, 2016: Indian Pediatrics
https://www.readbyqxmd.com/read/27757584/proteinuria-in-dent-disease-a-review-of-the-literature
#12
Youri van Berkel, Michael Ludwig, Joanna A E van Wijk, Arend Bökenkamp
BACKGROUND: Dent disease is a rare X-linked recessive proximal tubulopathy caused by mutations in CLCN5 (Dent-1) or OCRL (Dent-2). As a rule, total protein excretion (TPE) is low in tubular proteinuria compared with glomerular disease. Several authors have reported nephrotic-range proteinuria (NP) and glomerulosclerosis in Dent disease. Therefore, we aimed to analyze protein excretion in patients with documented CLCN5 or OCRL mutations in a systematic literature review. DESIGN: PubMed and Embase were searched for cases with documented CLCN5 or OCRL mutations and (semi-)quantitative data on protein excretion...
October 18, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27708066/long-term-renal-outcome-in-children-with-ocrl-mutations-retrospective-analysis-of-a-large-international-cohort
#13
Marcin Zaniew, Arend Bökenkamp, Marcin Kołbuc, Claudio La Scola, Federico Baronio, Anna Niemirska, Maria Szczepańska, Julia Bürger, Angela La Manna, Monika Miklaszewska, Anna Rogowska-Kalisz, Jutta Gellermann, Argyroula Zampetoglou, Anna Wasilewska, Magdalena Roszak, Jerzy Moczko, Aleksandra Krzemień, Dariusz Runowski, Grzegorz Siteń, Iga Załuska-Leśniewska, Patrizia Fonduli, Franca Zurrida, Fabio Paglialonga, Zoran Gucev, Dusan Paripovic, Rina Rus, Valerie Said-Conti, Lisa Sartz, Woo Yeong Chung, Se Jin Park, Jung Won Lee, Yong Hoon Park, Yo Han Ahn, Przemysław Sikora, Constantinos J Stefanidis, Velibor Tasic, Martin Konrad, Franca Anglani, Maria Addis, Hae Il Cheong, Michael Ludwig, Detlef Bockenhauer
BACKGROUND: Lowe syndrome (LS) and Dent-2 disease (DD2) are disorders associated with mutations in the OCRL gene and characterized by progressive chronic kidney disease (CKD). Here, we aimed to investigate the long-term renal outcome and identify potential determinants of CKD and its progression in children with these tubulopathies. METHODS: Retrospective analyses were conducted of clinical and genetic data in a cohort of 106 boys (LS: 88 and DD2: 18). For genotype-phenotype analysis, we grouped mutations according to their type and localization...
October 5, 2016: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/27662203/amyloid-cast-tubulopathy-a-unique-form-of-immunoglobulin-induced-renal-disease
#14
I-A Iliuta, A P Garneau, E Latulippe, P Isenring
No abstract text is available yet for this article.
September 23, 2016: Blood Cancer Journal
https://www.readbyqxmd.com/read/27648267/fetal-urine-biochemistry-in-antenatal-bartter-syndrome-a-case-report
#15
Myriam L Rachid, Sophie Dreux, Isabelle Czerkiewicz, Georges Deschênes, Rosa Vargas-Poussou, Dominique Mahieu-Caputo, Jean-François Oury, Françoise Muller
Bartter syndrome is a severe inherited tubulopathy responsible for renal salt wasting, and hence electrolyte disorders and dehydration. Prenatally, it is characterized by severe polyhydramnios caused by fetal polyuria. We studied for the first time fetal urine in a Bartter syndrome case and demonstrated that the tubulopathy is already present at 24 weeks of gestation.
September 2016: Clinical Case Reports
https://www.readbyqxmd.com/read/27526707/paraprotein-related-kidney-disease-kidney-injury-from-paraproteins-what-determines-the-site-of-injury
#16
Mona Doshi, Amit Lahoti, Farhad R Danesh, Vecihi Batuman, Paul W Sanders
Disorders of plasma and B cells leading to paraproteinemias are associated with a variety of renal diseases. Understanding the mechanisms of injury and associated nephropathies provides a framework that aids clinicians in prompt diagnosis and appropriate adjunctive treatment of these disorders. Glomerular diseases that may be associated with paraproteinemias include amyloid deposition, monoclonal Ig deposition disease, proliferative GN with monoclonal Ig deposits, C3 glomerulopathy caused by alterations in the complement pathway, immunotactoid glomerulopathy, fibrillary GN, and cryoglobulinemia...
December 7, 2016: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/27526705/paraprotein-related-kidney-disease-diagnosing-and-treating-monoclonal-gammopathy-of-renal-significance
#17
Mitchell H Rosner, Amaka Edeani, Motoko Yanagita, Ilya G Glezerman, Nelson Leung
Paraprotein-related kidney disease represents a complex group of diseases caused by an abnormal paraprotein secreted by a clone of B cells. The disease manifestations range from tubulopathies, such as the Fanconi syndrome, to a spectrum of glomerular diseases that can present with varying degrees of proteinuria and renal dysfunction. Diagnosis of these diseases can be challenging because of the wide range of manifestations as well as the relatively common finding of a serum paraprotein, especially in elderly patients...
December 7, 2016: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/27500072/east-syndrome-clinical-pathophysiological-and-genetic-aspects-of-mutations-in-kcnj10
#18
REVIEW
Ola Abdelhadi, Daniela Iancu, Horia Stanescu, Robert Kleta, Detlef Bockenhauer
EAST syndrome is a recently described autosomal recessive disorder secondary to mutations in KCNJ10 (Kir4.1), a gene encoding a potassium channel expressed in the brain, eye, ear and kidney. This condition is characterized by 4 cardinal features; Epilepsy, Ataxia, Sensorineural deafness, and (a renal salt-wasting) Tubulopathy, hence the acronym EAST syndrome. Here we review reported clinical manifestations, in particular the neurological signs and symptoms which typically have the most impact on the quality of life of patients...
2016: Rare Diseases
https://www.readbyqxmd.com/read/27488999/renal-phenotype-in-bardet-biedl-syndrome-a-combined-defect-of-urinary-concentration-and-dilution-is-associated-with-defective-urinary-aqp2-and-umod-excretion
#19
Miriam Zacchia, Enza Zacchia, Enrica Zona, Giovanna Capolongo, Ilaria Raiola, Luca Rinaldi, Francesco Trepiccione, Diego Ingrosso, Alessandra Perna, Valentina Di Iorio, Francesca Simonelli, Orson W Moe, Giovambattista Capasso
The renal phenotype in Bardet-Biedl syndrome (BBS) is highly variable. The present study describes renal findings in 41 BBS patients and analyzes the pathogenesis of hyposthenuria, the most common renal dysfunction. Five of 41 patients (12%) showed an estimated glomerular filtration rate < 60 ml·min(-1)·1.73 m(-2) Urine protein and urine albumin-to-creatinine ratio were over 200 and 30 mg/g in 9/24 and 7/23 patients, respectively. Four of 41 patients showed no renal anomalies on ultrasound. Twenty of 34 patients had hyposthenuria in the absence of renal insufficiency...
October 1, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27468978/renal-disease-related-to-waldenstr%C3%A3-m-macroglobulinaemia-incidence-pathology-and-clinical-outcomes
#20
Josephine M Vos, Joshua Gustine, Helmut G Rennke, Zachary Hunter, Robert J Manning, Toni E Dubeau, Kirsten Meid, Monique C Minnema, Marie-Jose Kersten, Steven P Treon, Jorge J Castillo
The incidence and prognostic impact of nephropathy related to Waldenström macroglobulinaemia (WM) is currently unknown. We performed a retrospective study to assess biopsy-confirmed WM-related nephropathy in a cohort of 1391 WM patients seen at a single academic institution. A total of 44 cases were identified, the estimated cumulative incidence was 5·1% at 15 years. There was a wide variation in kidney pathology, some directly related to the WM: amyloidosis (n = 11, 25%), monoclonal-IgM deposition disease/cryoglobulinaemia (n = 10, 23%), lymphoplasmacytic lymphoma infiltration (n = 8, 18%), light-chain deposition disease (n = 4, 9%) and light-chain cast nephropathy (n = 4, 9%), and some probably related to the WM: thrombotic microangiopathy (TMA) (n = 3, 7%), minimal change disease (n = 2, 5%), membranous nephropathy (n = 1, 2%) and crystal-storing tubulopathy (n = 1, 2%)...
November 2016: British Journal of Haematology
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