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Nephrocalcinosis/Medullary sponge kidney

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53 papers 0 to 25 followers
By P O Pediatrics, Nephrology
https://www.readbyqxmd.com/read/27493007/the-need-for-genetic-study-to-diagnose-some-cases-of-distal-renal-tubular-acidosis
#1
Manuel Heras Benito, Miguel A Garcia-Gonzalez, María Valdenebro Recio, Álvaro Molina Ordás, Ramiro Callejas Martínez, María Astrid Rodríguez Gómez, Leonardo Calle García, Lisbeth Sousa Silva, María José Fernández-Reyes Luis
We describe the case of a young woman who was diagnosed with advanced kidney disease, with an incidental finding of nephrocalcinosis of unknown aetiology, having been found asymptomatic throughout her life. The genetic study by panels of known genes associated with tubulointerstitial disease allowed us to discover autosomal dominant distal renal tubular acidosis associated with a de novo mutation in exon 14 of the SLC4A1 gene, which would have been impossible to diagnose clinically due to the advanced nature of the kidney disease when it was discovered...
September 2016: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/27384690/rare-case-of-nephrocalcinosis-in-a-14-year-old-girl-questions
#2
Omar Bjanid, Piotr Adamczyk, Małgorzata Stojewska, Dagmara Roszkowska-Bjanid, Magdalena Paszyna-Grześkowiak, Agnieszka Jędzura, Joanna Oświęcimska, Katarzyna Ziora, Aurelia Morawiec-Knysak, Maria Szczepańska
A 14-year-old Caucasian girl with a history of primary hypoparathyroidism and unstable calcium and phosphorus levels and on ongoing treatment was admitted to the Department of Pediatric Nephrology because of the onset of nephrocalcinosis and difficulties achieving normocalcemia. Coexistence of hypoparathyroidism, oral candidiasis, dental enamel hypoplasia, and subclinical Hashimoto's disease was strongly suggestive for autoimmune polyglandular syndrome (APS) type I. One of the clinical implications of this diagnosis is the high probability of future occurrence of adrenal insufficiency and hence the importance of maintaining a high level of suspicion in case of the onset of symptoms like weakness, fainting, hypotonia, or hyperkaliemia...
July 6, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27384692/rare-case-of-nephrocalcinosis-in-a-14-year-old-girl-answers
#3
Omar Bjanid, Piotr Adamczyk, Małgorzata Stojewska, Dagmara Roszkowska-Bjanid, Magdalena Paszyna-Grześkowiak, Agnieszka Jędzura, Joanna Oświęcimska, Katarzyna Ziora, Aurelia Morawiec-Knysak, Maria Szczepańska
No abstract text is available yet for this article.
July 6, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/23223172/familial-clustering-of-medullary-sponge-kidney-is-autosomal-dominant-with-reduced-penetrance-and-variable-expressivity
#4
Antonia Fabris, Antonio Lupo, Pietro M Ferraro, Franca Anglani, York Pei, Francesco M Danza, Giovanni Gambaro
Medullary sponge kidney (MSK) is a renal malformation typically associated with nephrocalcinosis and recurrent calcium nephrolithiasis. Approximately 12% of recurrent stone formers have MSK, which is generally considered a sporadic disorder. Since its discovery, three pedigrees have been described in which an apparently autosomal dominant inheritance was suggested. Here, family members of 50 patients with MSK were systematically investigated by means of interviews, renal imaging, and biochemical studies in an effort to establish whether MSK is an inheritable disorder...
February 2013: Kidney International
https://www.readbyqxmd.com/read/24716085/medullary-sponge-kidney-and-testicular-dysgenesis-syndrome-a-rare-association
#5
Stefano Masciovecchio, Pietro Saldutto, Giuseppe Paradiso Galatioto, Carlo Vicentini
The medullary sponge kidney is also known as Lenarduzzi's kidney or Cacchi and Ricci's disease from the first Italian authors who described its main features. A review of the scientific literature underlines particular rarity of the association of MSK with developmental abnormalities of the lower urinary tract and genital tract such as hypospadias and bilateral cryptorchidism. The work presented is the only one in the scientific literature that shows the association between the medullary sponge kidney and the testicular dysgenesis syndrome...
2014: Case Reports in Urology
https://www.readbyqxmd.com/read/24855603/medullary-sponge-kidney-on-retrograde-pyelography
#6
Tsung-Yi Huang, Jih-Pin Lin, Shu-Pin Huang
A woman aged 31 had recurrent urinary tract infection with bloody urine. A series image of medullary sponge kidney presented by intravenous urography (IVU) was detected dynamically by retrograde pyelography (RP). Other than ultrasonography and IVU, RP is also a reliable method to detect medullary sponge kidney.
April 2014: Chonnam Medical Journal
https://www.readbyqxmd.com/read/24867557/image-diagnosis-medullary-sponge-kidney
#7
Talha H Imam, Alan S Taur, Hassan Patail
No abstract text is available yet for this article.
2014: Permanente Journal
https://www.readbyqxmd.com/read/26675490/hypercalcaemia-in-a-patient-with-2p13-2-p16-1-duplication
#8
Maria Lodefalk, Carina Frykholm, Elisabeth Esbjörner, Östen Ljunggren
BACKGROUND: Partial duplication of 2p is a rare condition that causes facial anomalies, psychomotor delay, and growth failure. Hypercalcaemia is rare in children. So far, duplication of 2p has never been associated with hypercalcaemia. METHODS: Here, we report a girl with a partial duplication of 2p presenting with moderate to severe hypercalcaemia at the age of 2 years. She also had hypercalciuria, nephrocalcinosis, decreased renal function, and secondary hyperparathyroidism at presentation...
2016: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/26613020/familial-hypomagnesaemia-with-hypercalciuria-and-nephrocalcinosis-clinical-and-molecular-characteristics
#9
Felix Claverie-Martin
Familial hypomagnesaemia with hypercalciuria and nephrocalcinosis (FHHNC) is an autosomal-recessive renal tubular disorder characterized by excessive urinary losses of magnesium and calcium, bilateral nephrocalcinosis and progressive chronic renal failure. Presentation with FHHNC symptoms generally occurs early in childhood or before adolescence. At present, the only therapeutic option is supportive and consists of oral magnesium supplementation and thiazide diuretics. However, neither treatment seems to have a significant effect on the levels of serum magnesium or urine calcium or on the decline of renal function...
December 2015: Clinical Kidney Journal
https://www.readbyqxmd.com/read/26598821/the-role-of-sodium-dependent-phosphate-transporter-in-phosphate-homeostasis
#10
REVIEW
Hiroko Segawa, Yuji Shiozaki, Ichiro Kaneko, Ken-ichi Miyamoto
Inorganic phosphate (Pi) is an essential compound for several biologic functions. Pi levels outside the normal range, however, contribute to several pathological processes. Hypophosphatemia leads to bone abnormalities, such as rickets/osteomalacia. Hyperphosphatemia contributes to vascular calcification in patients with chronic kidney disease and hemodialysis patients and is independently associated with cardiac mortality.Pi homeostasis is regulated by the coordinated function of renal and intestinal sodium-dependent phosphate (NaPi) transporters with dietary Pi, parathyroid hormone, 1,25-dihydroxyvitamin D3, and fibroblast growth factor 23...
2015: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/26590809/alkaline-phosphatase-and-hypophosphatasia
#11
REVIEW
José Luis Millán, Michael P Whyte
Hypophosphatasia (HPP) results from ALPL mutations leading to deficient activity of the tissue-non-specific alkaline phosphatase isozyme (TNAP) and thereby extracellular accumulation of inorganic pyrophosphate (PPi), a natural substrate of TNAP and potent inhibitor of mineralization. Thus, HPP features rickets or osteomalacia and hypomineralization of teeth. Enzyme replacement using mineral-targeted TNAP from birth prevented severe HPP in TNAP-knockout mice and was then shown to rescue and substantially treat infants and young children with life-threatening HPP...
April 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/26588476/characterization-of-fgf23-dependent-egr-1-cistrome-in-the-mouse-renal-proximal-tubule
#12
Anthony A Portale, Martin Y H Zhang, Valentin David, Aline Martin, Yan Jiao, Weikuan Gu, Farzana Perwad
Fibroblast growth factor 23 (FGF23) is a potent regulator of phosphate (Pi) and vitamin D homeostasis. The transcription factor, early growth response 1 (egr-1), is a biomarker for FGF23-induced activation of the ERK1/2 signaling pathway. We have shown that ERK1/2 signaling blockade suppresses renal egr-1 gene expression and prevents FGF23-induced hypophosphatemia and 1,25-dihydroxyvitamin D (1,25(OH)2D) suppression in mice. To test whether egr-1 itself mediates these renal actions of FGF23, we administered FGF23 to egr-1-/- and wild-type (WT) mice...
2015: PloS One
https://www.readbyqxmd.com/read/26585929/lc-ms-ms-for-identifying-patients-with-cyp24a1-mutations
#13
Hemamalini Ketha, Rajiv Kumar, Ravinder J Singh
BACKGROUND: Patients have been described with loss-of-function CYP24A1 (cytochrome P450, family 24, subfamily A, polypeptide 1) mutations that cause a high ratio of 25-hydroxyvitamin D to 24,25-dihydroxyvitamin D [25(OH)D/24,25(OH)2D], increased serum 1,25-dihydroxyvitamin D, and resulting hypercalcemia, hypercalciuria and nephrolithiasis. A 25(OH)D/24,25(OH)2D ratio that can identify patients who are candidates for confirmatory CYP24A1 genetic testing would be valuable. We validated an LC-MS/MS assay for 24,25(OH)2D (D3 and D2) and determined a 25(OH)D/24,25(OH)2D cutoff to identify candidates for confirmatory genetic testing...
January 2016: Clinical Chemistry
https://www.readbyqxmd.com/read/26540764/nephrolithiasis-and-nephrocalcinosis-in-children-metabolic-and-genetic-factors
#14
REVIEW
Velibor Tasic, Zoran Gucev
Diagnosis and management of pediatric nephrolithiasis/nephrocalcinosis is a very complex and challenging task for every pediatrician. It is based on correct. disease history taking, which may guide to the mode of inheritance (dominant, recessive, x-linked). Ethnicity and consanguinity should also be investigated since they predispose to high prevalence of certain disorders. One should always begin with cheap and available screening tests. Herein we will review clinical, biochemical, metabolic and genetic characteristics of the inherited diseases which lead to nephrolithiasis/nephrocalcinosis, such as: idiopathic hypercalciuria, renal hypophosphatemia, renal tubular acidosis, idiopathic infantile hypercalcemia, Dent disease, familial hypomagnesemia with hypercalciuria and nephrocalcinosis, hypocitraturia, cystinuria, primary hyperoxaluria and renal hypouricemia...
September 2015: Pediatric Endocrinology Reviews: PER
https://www.readbyqxmd.com/read/24871857/calcium-sensing-receptor-20-years-later
#15
REVIEW
Tariq I Alfadda, Ahmad M A Saleh, Pascal Houillier, John P Geibel
The calcium-sensing receptor (CaSR) has played an important role as a target in the treatment of a variety of disease states over the past 20 plus years. In this review, we give an overview of the receptor at the cellular level and then provide details as to how this receptor has been targeted to modulate cellular ion transport mechanisms. As a member of the G protein-coupled receptor (GPCR) family, it has a high degree of homology with a variety of other members in this class, which could explain why this receptor has been identified in so many different tissues throughout the body...
August 1, 2014: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/26082470/adaptor-protein-2-sigma-subunit-mutations-causing-familial-hypocalciuric-hypercalcaemia-type-3-fhh3-demonstrate-genotype-phenotype-correlations-codon-bias-and-dominant-negative-effects
#16
Fadil M Hannan, Sarah A Howles, Angela Rogers, Treena Cranston, Caroline M Gorvin, Valerie N Babinsky, Anita A Reed, Clare E Thakker, Detlef Bockenhauer, Rosalind S Brown, John M Connell, Jacqueline Cook, Ken Darzy, Sarah Ehtisham, Una Graham, Tony Hulse, Steven J Hunter, Louise Izatt, Dhavendra Kumar, Malachi J McKenna, John A McKnight, Patrick J Morrison, M Zulf Mughal, Domhnall O'Halloran, Simon H Pearce, Mary E Porteous, Mushtaqur Rahman, Tristan Richardson, Robert Robinson, Isabelle Scheers, Haroon Siddique, William G Van't Hoff, Timothy Wang, Michael P Whyte, M Andrew Nesbit, Rajesh V Thakker
The adaptor protein-2 sigma subunit (AP2σ2) is pivotal for clathrin-mediated endocytosis of plasma membrane constituents such as the calcium-sensing receptor (CaSR). Mutations of the AP2σ2 Arg15 residue result in familial hypocalciuric hypercalcaemia type 3 (FHH3), a disorder of extracellular calcium (Ca(2+) o) homeostasis. To elucidate the role of AP2σ2 in Ca(2+) o regulation, we investigated 65 FHH probands, without other FHH-associated mutations, for AP2σ2 mutations, characterized their functional consequences and investigated the genetic mechanisms leading to FHH3...
September 15, 2015: Human Molecular Genetics
https://www.readbyqxmd.com/read/26136545/calcium-sensing-in-the-renal-tubule
#17
REVIEW
Hakan R Toka, Martin R Pollak, Pascal Houillier
In addition to its prominent role in the parathyroid gland, the calcium-sensing receptor (CaSR) is expressed in various tissues, including the kidney. This article reviews current data on the calcium-sensing properties of the kidney, the localization of the CaSR protein along the nephron, and its function in calcium homeostasis and in hypercalciuria.
July 2015: Physiology
https://www.readbyqxmd.com/read/26161261/successful-treatment-of-neonatal-severe-hyperparathyroidism-with-cinacalcet-in-two-patients
#18
Marisa M Fisher, Susanne M Cabrera, Erik A Imel
UNLABELLED: Neonatal severe hyperparathyroidism (NSHPT) is a rare disorder caused by inactivating calcium-sensing receptor (CASR) mutations that result in life-threatening hypercalcemia and metabolic bone disease. Until recently, therapy has been surgical parathyroidectomy. Three previous case reports have shown successful medical management of NSHPT with cinacalcet. Here we present the detailed description of two unrelated patients with NSHPT due to heterozygous R185Q CASR mutations...
2015: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/19820004/hypophosphatemic-rickets-with-hypercalciuria-due-to-mutation-in-slc34a3-type-iic-sodium-phosphate-cotransporter-presentation-as-hypercalciuria-and-nephrolithiasis
#19
Amanda L Tencza, Shoji Ichikawa, Anna Dang, David Kenagy, Edward McCarthy, Michael J Econs, Michael A Levine
CONTEXT: Hereditary hypophosphatemic rickets with hypercalciuria (HHRH) is a metabolic disorder due to homozygous loss-of-function mutations in the SLC34A3 gene encoding the renal type IIc sodium-phosphate cotransporter (NaPi-IIc). The typical presentation is severe rickets and hypophosphatemia, and hypercalciuria is often discovered later or overlooked. OBJECTIVE: We sought to determine the genetic basis for severe hypercalciuria and nephrolithiasis/nephrocalcinosis in an adolescent male with elevated serum levels of calcitriol but normal serum levels of calcium and phosphorus...
November 2009: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/20074341/genetic-and-clinical-peculiarities-in-a-new-family-with-hereditary-hypophosphatemic-rickets-with-hypercalciuria-a-case-report
#20
Natalia Mejia-Gaviria, Helena Gil-Peña, Eliecer Coto, Teresa M Pérez-Menéndez, Fernando Santos
Hereditary hypophosphatemic rickets with hypercalciuria is a rare autosomal recessive disorder (OMIM #241530), characterized by decreased renal phosphate reabsorption that leads to hypophosphatemia, rickets, and bone pain; hypophosphatemia is believed to stimulate 1,25 dihydroxyvitamin D synthesis which, in turn, results in hypercalciuria. Hereditary hypophosphatemic rickets with hypercalciuria is caused by loss-of-function in the type 2c sodium phosphate cotransporter encoded by the SLC34A3 gene. This report shows a family with a non-previously identified mutation in the SLC34A3 gene and exhibiting mild and different manifestations of HHRH...
2010: Orphanet Journal of Rare Diseases
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