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https://www.readbyqxmd.com/read/27932479/progress-in-understanding-the-genetics-of-calcium-containing-nephrolithiasis
#1
John A Sayer
Renal stone disease is a frequent condition, causing a huge burden on health care systems globally. Calcium-based calculi account for around 75% of renal stone disease and the incidence of these calculi is increasing, suggesting environmental and dietary factors are acting upon a preexisting genetic background. The familial nature and significant heritability of stone disease is known, and recent genetic studies have successfully identified genes that may be involved in renal stone formation. The detection of monogenic causes of renal stone disease has been made more feasible by the use of high-throughput sequencing technologies and has also facilitated the discovery of novel monogenic causes of stone disease...
December 8, 2016: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/27932476/high-fat-diet-induced-lysosomal-dysfunction-and-impaired-autophagic-flux-contribute-to-lipotoxicity-in-the-kidney
#2
Takeshi Yamamoto, Yoshitsugu Takabatake, Atsushi Takahashi, Tomonori Kimura, Tomoko Namba, Jun Matsuda, Satoshi Minami, Jun-Ya Kaimori, Isao Matsui, Taiji Matsusaka, Fumio Niimura, Motoko Yanagita, Yoshitaka Isaka
Excessive fat intake contributes to the progression of metabolic diseases via cellular injury and inflammation, a process termed lipotoxicity. Here, we investigated the role of lysosomal dysfunction and impaired autophagic flux in the pathogenesis of lipotoxicity in the kidney. In mice, a high-fat diet (HFD) resulted in an accumulation of phospholipids in enlarged lysosomes within kidney proximal tubular cells (PTCs). In isolated PTCs treated with palmitic acid, autophagic degradation activity progressively stagnated in association with impaired lysosomal acidification and excessive lipid accumulation...
December 8, 2016: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/27932191/iga-nephropathy-clinicopathologic-study-following-the-oxford-classification-progression-peculiarities-and-gender-related-differences
#3
Živile Riispere, Arvydas Laurinavičius, Anne Kuudeberg, Elviira Seppet, Kristin Sepp, Madis Ilmoja, Merike Luman, Külli Kõlvald, Asta Auerbach, Mai Ots-Rosenberg
BACKGROUND AND AIM: Immunoglobulin A nephropathy (IgAN) is the most frequent glomerular disease worldwide and one of the main causes of chronic kidney disease. We aimed to investigate clinicopathological correlations in IgAN patients by gender. MATERIALS AND METHODS: The study was based on a retrospective analysis of renal biopsy data and clinical manifestations of the disease. Consecutive 73 biopsy-proven IgAN cases of male (62%) and female (38%) patients were investigated...
November 22, 2016: Medicina
https://www.readbyqxmd.com/read/27930976/nephro-protective-effect-of-a-novel-formulation-of-unopened-coconut-inflorescence-sap-powder-on-gentamicin-induced-renal-damage-by-modulating-oxidative-stress-and-inflammatory-markers
#4
Svenia P Jose, Asha S, Krishnakumar Im, Ratheesh M, Savitha Santhosh, Sandya S, Girish Kumar B, Pramod C
Fresh oyster white translucent sap obtained from the tender unopened inflorescence of coconut trees (Cocos nucifera) is identified to have great health benefits. Drug induced Nephrotoxicity is one of the major causes of renal damage in present generation. As a therapeutic agent, gentamicin imparts direct toxicity to kidney, resulting in acute tubular necrosis, glomerular and tubulointerstitial injury, haemodynamically mediated damage and obstructive nephropathy.There exists an increasing demand for safe and natural agents for the treatment and/or preventionofchronic nephrotoxicity and pathogenesis of kidney diseases...
December 5, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27927779/depletion-of-gut-microbiota-protects-against-renal-ischemia-reperfusion-injury
#5
Diba Emal, Elena Rampanelli, Ingrid Stroo, Loes M Butter, Gwendoline J Teske, Nike Claessen, Geurt Stokman, Sandrine Florquin, Jaklien C Leemans, Mark C Dessing
An accumulating body of evidence shows that gut microbiota fulfill an important role in health and disease by modulating local and systemic immunity. The importance of the microbiome in the development of kidney disease, however, is largely unknown. To study this concept, we depleted gut microbiota with broad-spectrum antibiotics and performed renal ischemia-reperfusion (I/R) injury in mice. Depletion of the microbiota significantly attenuated renal damage, dysfunction, and remote organ injury and maintained tubular integrity after renal I/R injury...
December 7, 2016: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/27924845/caffeine-prevents-kidney-stone-formation-by-translocation-of-apical-surface-annexin-a1-crystal-binding-protein-into-cytoplasm-in-vitro-evidence
#6
Paleerath Peerapen, Visith Thongboonkerd
Recent large 3 cohorts have shown that caffeinated beverage consumption was associated with lower risk of kidney stone disease. However, its protective mechanisms remained unknown and had not been previously investigated. We thus evaluated protective effects of caffeine (1 μM-10 mM) on calcium oxalate monohydrate (COM) kidney stone formation, using crystallization, crystal growth, cell-crystal adhesion, Western blotting, and immunofluorescence assays. The results showed that caffeine reduced crystal number but, on the other hand, increased crystal size, resulting in unchanged crystal mass, consistent with crystal growth that was not affected by caffeine...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921041/signaling-crosstalk-between-tubular-epithelial-cells-and-interstitial-fibroblasts-after-kidney-injury
#7
REVIEW
Roderick J Tan, Dong Zhou, Youhua Liu
BACKGROUND: A wide variety of kidney diseases ultimately lead to tubulointerstitial damage. The initial site of injury is usually the renal tubules, with activation of fibroblasts occurring later. Self-limited disease is characterized by transient cellular activation with timed deactivation and ultimately a return to normal functioning, whereas sustained responses characterize chronic disease and the development of irreversible fibrosis. The underlying molecular and cellular mechanisms of this cascade of events remain an area of active research...
October 2016: Kidney Diseases
https://www.readbyqxmd.com/read/27921040/new-insights-into-the-molecular-mechanisms-targeting-tubular-channels-transporters-in-pkd-development
#8
REVIEW
Ming Wu, Shengqiang Yu
BACKGROUND: Autosomal dominant polycystic kidney disease (PKD) or autosomal recessive PKD is caused by a mutation in the PKD1, PKD2 or PKHD1 gene, which encodes polycystin-1, polycystin-2 or fibrocystin, respectively. Embryonic and postnatal mutation studies show that transport or channel function is dysregulated before the initiation of cystogenesis, suggesting that the abnormality of transport or channel function plays a critical role in the pathology of PKD. SUMMARY: Polycystin-2 by itself is a calcium-permeable cation channel, and its channel function can be regulated by polycystin-1 or fibrocystin...
October 2016: Kidney Diseases
https://www.readbyqxmd.com/read/27916890/indoxyl-sulfate-review-of-toxicity-and-therapeutic-strategies
#9
REVIEW
Sheldon C Leong, Tammy L Sirich
Indoxyl sulfate is an extensively studied uremic solute. It is a small molecule that is more than 90% bound to plasma proteins. Indoxyl sulfate is derived from the breakdown of tryptophan by colon microbes. The kidneys achieve high clearances of indoxyl sulfate by tubular secretion, a function not replicated by hemodialysis. Clearance by hemodialysis is limited by protein binding since only the free, unbound solute can diffuse across the membrane. Since the dialytic clearance is much lower than the kidney clearance, indoxyl sulfate accumulates to relatively high plasma levels in hemodialysis patients...
November 30, 2016: Toxins
https://www.readbyqxmd.com/read/27916281/intratumoral-heterogeneity-of-macrophages-and-fibroblasts-in-breast-cancer-is-associated-with-the-morphological-diversity-of-tumor-cells-and-contributes-to-lymph-node-metastasis
#10
Lubov A Tashireva, Evgeny V Denisov, Tatiana S Gerashchenko, Daria N Pautova, Mikhail A Buldakov, Marina V Zavyalova, Julia Kzhyshkowska, Nadezhda V Cherdyntseva, Vladimir M Perelmuter
Recent studies have highlighted the heterogeneity of the tumor microenvironment (ME) and the importance of its analysis to the understanding of its impact on clinical outcomes. In this study, we aimed to analyze the intratumoral distribution of macrophages and fibroblasts in breast cancer (BC) based on the morphological diversity of tumor cells (tubular, alveolar, solid, trabecular and discrete structures) and the clinicopathological parameters of the disease. Thirty-six patients with invasive breast carcinoma of no special type were included in the study...
November 27, 2016: Immunobiology
https://www.readbyqxmd.com/read/27914707/adiponectin-alters-renal-calcium-and-phosphate-excretion-through-regulation-of-klotho-expression
#11
Joseph M Rutkowski, Johanne Pastor, Kai Sun, Sun K Park, I Alexandru Bobulescu, Christopher T Chen, Orson W Moe, Philipp E Scherer
The kidney controls systemic calcium and phosphate levels and disturbances of its control mechanisms can lead to a variety of diseases. The insulin-sensitizing adipokine adiponectin is renoprotective and accelerates functional recovery following renal injury. However, unlike other adipokines, adiponectin is reduced in obesity. High adiponectin levels are also correlated with bone loss, suggestive of an additional action in mineral metabolism. Using knockout, wild-type, and adiponectin-overexpressing transgenic mice, we sought to identify the mechanistic basis for adiponectin's ability to regulate calcium and phosphate balance at the level of the kidney...
November 30, 2016: Kidney International
https://www.readbyqxmd.com/read/27914701/il-2-anti-il-2-complexes-ameliorate-lupus-nephritis-by-expansion-of-cd4-cd25-foxp3-regulatory-t%C3%A2-cells
#12
Ji-Jing Yan, Jae-Ghi Lee, Joon Young Jang, Tai Yeon Koo, Curie Ahn, Jaeseok Yang
Adoptive transfer of regulatory T cells (Tregs) can delay disease progression and reduce mortality in lupus-prone mice. Here, we tested whether complex (IL-2C) consisting of IL-2 and anti-IL-2 monoclonal antibody (JES6-1) ameliorates lupus nephritis by expanding Tregs as an alternative to problematic Treg infusion therapy. IL-2C treatment of NZB/W F1 mice induced an effective and sustained expansion of CD4(+)CD25(+)Foxp3(+) Tregs in both the kidneys and spleen along with decreased renal infiltration of T cells, B cells, and innate immune cells...
November 30, 2016: Kidney International
https://www.readbyqxmd.com/read/27907168/are-urinary-tubular-injury-markers-useful-in-chronic-kidney-disease-a-systematic-review-and-meta-analysis
#13
Le-Ting Zhou, Lin-Li Lv, Ming-Ming Pan, Yu-Han Cao, Hong Liu, Ye Feng, Hai-Feng Ni, Bi-Cheng Liu
BACKGROUND: Adverse outcome of chronic kidney disease, such as end stage renal disease, is a significant burden on personal health and healthcare costs. Urinary tubular injury markers, such as NGAL, KIM-1 and NAG, could provide useful prognostic value for the early identification of high-risk patients. However, discrepancies between recent large prospective studies have resulted in controversy regarding the potential clinical value of these markers. Therefore, we conducted the first meta-analysis to provide a more persuasive argument to this debate...
2016: PloS One
https://www.readbyqxmd.com/read/27906866/inherited-and-acquired-disorders-of-magnesium-homeostasis
#14
Matthias Tilmann Florian Wolf
PURPOSE OF REVIEW: Magnesium (Mg) imbalances are frequently overlooked. Hypermagnesemia usually occurs in preeclamptic women after Mg therapy or in end-stage renal disease patients, whereas hypomagnesemia is more common with a prevalence of up to 15% in the general population. Increasing evidence points toward a role for mild-to-moderate chronic hypomagnesemia in the pathogenesis of hypertension, type 2 diabetes mellitus, and metabolic syndrome. RECENT FINDINGS: The kidneys are the major regulator of total body Mg homeostasis...
November 30, 2016: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/27904828/dent-s-disease-complicated-by-nephrotic-syndrome-a-case-report
#15
Guohua He, Hongwen Zhang, Shanshan Cao, Huijie Xiao, Yong Yao
Dent's disease is an X-linked recessive proximal tubular disorder that mostly affects male patients in childhood or early adult life. The condition is caused by mutations in the CLCN5 (Dent disease 1) or OCRL (Dent disease 2) genes located on chromosome Xp11.22 and Xq25, respectively. In most male patients, proteinuria is subnephrotic but may reach nephrotic levels. Here, we report the first case of Dent's disease complicated by nephrotic syndrome. Dent's disease should be considered in the differential diagnosis of nephrotic syndrome, and especially in male patients with early onset of nephrotic syndrome...
November 2016: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/27904154/circadian-rhythm-of-blood-pressure-and-the-renin-angiotensin-system-in-the-kidney
#16
REVIEW
Naro Ohashi, Shinsuke Isobe, Sayaka Ishigaki, Hideo Yasuda
Activation of the intrarenal renin-angiotensin system (RAS) has a critical role in the pathophysiology of the circadian rhythm of blood pressure (BP) and renal injury, independent of circulating RAS. Although it is clear that the circulating RAS has a circadian rhythm, reports of a circadian rhythm in tissue-specific RAS are limited. Clinical studies evaluating intrarenal RAS activity by urinary angiotensinogen (AGT) levels have indicated that urinary AGT levels were equally low during both the daytime and nighttime in individuals without chronic kidney disease (CKD) and that urinary AGT levels were higher during the daytime than at nighttime in patients with CKD...
December 1, 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27904113/fanconi-syndrome-associated-with-hyponatremia-in-two-patients-with-legionella-pneumonia
#17
Akihiro Ryuge, Yasuhiko Ito, Taishi Yamakawa, Hitoshi Tanaka, Hirotoshi Yasui, Shuko Mashimo, Kenshi Watanabe, Rie Nomura, Nobukazu Suganuma, Shoichi Maruyama
Legionella pneumophila is a cause of community-acquired pneumonia that is reported to induce electrolyte disorders, including hyponatremia, hypokalemia, and hypophosphatemia. We herein report two Japanese men with Legionella pneumonia and hyponatremia and hypophosphatemia. These findings were associated with an elevation of urinary low-molecular-weight tubular protein, including urinary β2-microglobulin, N-acetyl-β-D-glucosaminidase, the fractional excretion of phosphate and uric acid, and the presence of glycosuria and panaminoaciduria, suggesting that their electrolyte disorders had been caused by Fanconi syndrome...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27900941/the-kidney-in-sickle-hemoglobinopathies%C3%A2
#18
Medha Airy, Garabed Eknoyan
With improvements in the care of patients with sickle hemoglobinopathies, sickle cell disease (SCD) has evolved from a disease that was fatal in childhood into one in which most survive past their 5th decade and some into old age. As a result, the renal complications of sickle hemoglobinopathies, which are age dependent, have emerged as a common and serious complication of SCD. Approximately 14 - 18% of mortality in SCD is attributed to chronic kidney disease (CKD), which develops in 1/3 of individuals with SCD and progresses to end-stage renal disease in 4 - 18% of them...
November 30, 2016: Clinical Nephrology
https://www.readbyqxmd.com/read/27896392/tubular-and-genetic-disorders-associated-with-kidney-stones
#19
REVIEW
Nilufar Mohebbi, Pietro Manuel Ferraro, Giovanni Gambaro, Robert Unwin
This concise review summarizes our current understanding and the recent developments in genetics and related renal tubular disorders that have been linked with, or have been shown to be causal in, renal stone disease. The aim is to provide a readily accessible quick and easy update for urologists, nephrologists and endocrine or metabolic physicians whose practice involves the diagnosis and management of nephrolithiasis. An important message is to always consider a seemingly rare, and usually genetic, cause of kidney stones, since some of these are emerging as more common than originally thought, especially in adult clinical practice in which a family history of stones is a common finding...
November 28, 2016: Urolithiasis
https://www.readbyqxmd.com/read/27895154/kidney-tubular-ablation-of-ocrl-inpp5b-phenocopies-lowe-syndrome-tubulopathy
#20
Kazunori Inoue, Daniel M Balkin, Lijuan Liu, Ramiro Nandez, Yumei Wu, Xuefei Tian, Tong Wang, Robert Nussbaum, Pietro De Camilli, Shuta Ishibe
Lowe syndrome and Dent disease are two conditions that result from mutations of the inositol 5-phosphatase oculocerebrorenal syndrome of Lowe (OCRL) and share the feature of impaired kidney proximal tubule function. Genetic ablation of Ocrl in mice failed to recapitulate the human phenotypes, possibly because of the redundant functions of OCRL and its paralog type 2 inositol polyphosphate-5-phosphatase (INPP5B). Germline knockout of both paralogs in mice results in early embryonic lethality. We report that kidney tubule-specific inactivation of Inpp5b on a global Ocrl-knockout mouse background resulted in low molecular weight proteinuria, phosphaturia, and acidemia...
November 28, 2016: Journal of the American Society of Nephrology: JASN
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