keyword
MENU ▼
Read by QxMD icon Read
search

Renal proximal tubule

keyword
https://www.readbyqxmd.com/read/29145401/anatomically-specific-intratubular-and-interstitial-biominerals-in-the-human-renal-medullo-papillary-complex
#1
Ling Chen, Ryan S Hsi, Feifei Yang, Benjamin A Sherer, Marshall L Stoller, Sunita P Ho
Limited information exists on the anatomically-specific early stage events leading to clinically detectable mineral aggregates in the renal papilla. In this study, quantitative multiscale correlative maps of structural, elemental and biochemical properties of whole medullo-papillary complexes from human kidneys were developed. Correlative maps of properties specific to the uriniferous and vascular tubules using high-resolution X-ray computed tomography, scanning and transmission electron microscopy, energy dispersive X-ray spectroscopy, and immunolocalization of noncollagenous proteins (NCPs) along with their association with anatomy specific biominerals were obtained...
2017: PloS One
https://www.readbyqxmd.com/read/29145399/point-mutation-in-d8c-domain-of-tamm-horsfall-protein-uromodulin-in-transgenic-mice-causes-progressive-renal-damage-and-hyperuricemia
#2
Lijie Ma, Yan Liu, Nichole K Landry, Tarek M El-Achkar, John C Lieske, Xue-Ru Wu
Hereditary mutations in Tamm-Horsfall protein (THP/uromodulin) gene cause autosomal dominant kidney diseases characterized by juvenile-onset hyperuricemia, gout and progressive kidney failure, although the disease pathogenesis remains unclear. Here we show that targeted expression in transgenic mice of a mutation within the domain of 8 cysteines of THP in kidneys' thick ascending limb (TAL) caused unfolded protein response in younger (1-month old) mice and apoptosis in older (12-month old) mice. While the young mice had urine concentration defects and polyuria, such defects progressively reversed in the older mice to marked oliguria, highly concentrated urine, fibrotic kidneys and reduced creatinine clearance...
2017: PloS One
https://www.readbyqxmd.com/read/29144539/model-based-evaluation-of-proximal-sodium-reabsorption-through-sglt2-in-health-and-diabetes-and-the-effect-of-inhibition-with-canagliflozin
#3
Jessica A Brady, K Melissa Hallow
Sodium-glucose cotransporter 2 inhibitors (SGLT2i) reduce glucose levels in diabetes by inhibiting renal glucose reabsorption in the proximal tubule (PT), resulting in urinary glucose excretion. A recent large cardiovascular outcomes trial suggested that the SGLT2i empagliflozin may also decrease risk of renal dysfunction. Because sodium (Na) and glucose reabsorption are coupled through SGLT2, it is hypothesized that the renal benefits may be derived from lowering Na reabsorption in the PT, which would lead to favorable renal hemodynamic changes...
November 16, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29142988/proximal-tubular-expression-patterns-of-megalin-and-cubilin-in-proteinuric-nephropathies
#4
Jia Sun, Kjell Hultenby, Jonas Axelsson, Johan Nordström, Bing He, Annika Wernerson, Karin Lindström
Introduction: Receptor-mediated endocytosis is responsible for protein reabsorption in the proximal tubules. For albumin this process involves at least 2 interacting receptors, megalin and cubilin. Albumin is not usually present in the urine, indicating a highly efficient tubular reuptake under physiological conditions. However, early appearance of albuminuria may mean that the tubular system is overwhelmed by large quantities of albumin or that the function is impaired. Methods: To better understand the physiological role of megalin and cubilin in human renal disease, renal biopsies from 15 patients with a range of albuminuria and 3 healthy living donors were analyzed for proximal tubular expression of megalin and cubilin using immunohistochemistry (IHC) and semiquantitative immune-electron microscopy...
July 2017: KI Reports
https://www.readbyqxmd.com/read/29137984/recombinant-human-glp-1-rhglp-1-alleviating-renal-tubulointestitial-injury-in-diabetic-stz-induced-rats
#5
Weiqin Yin, Shiqing Xu, Zai Wang, Honglin Liu, Liang Peng, Qing Fang, Tingting Deng, Wenjian Zhang, Jinning Lou
GLP-1-based treatment improves glycemia through stimulation of insulin secretion and inhibition of glucagon secretion. Recently, more and more findings showed that GLP-1 could also protect kidney from diabetic nephropathy. Most of these studies focused on glomeruli, but the effect of GLP-1 on tubulointerstitial and tubule is not clear yet. In this study, we examined the renoprotective effect of recombinant human GLP-1 (rhGLP-1), and investigated the influence of GLP-1 on inflammation and tubulointerstitial injury using diabetic nephropathy rats model of STZ-induced...
November 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29133867/evidence-of-renal-angiomyolipoma-neoplastic-stem-cells-arising-from-renal-epithelial-cells
#6
Ana Filipa Gonçalves, Mojca Adlesic, Simone Brandt, Tomas Hejhal, Sabine Harlander, Lukas Sommer, Olga Shakhova, Peter J Wild, Ian J Frew
Renal angiomyolipomas (AML) contain an admixture of clonal tumour cells with features of several different mesenchymal lineages, implying the existence of an unidentified AML neoplastic stem cell. Biallelic inactivation of TSC2 or TSC1 is believed to represent the driving event in these tumours. Here we show that TSC2 knockdown transforms senescence-resistant cultured mouse and human renal epithelial cells into neoplastic stem cells that serially propagate renal AML-like tumours in mice. mTOR inhibitory therapy of mouse AML allografts mimics the clinical responses of human renal AMLs...
November 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29133360/selective-nanoparticle-targeting-of-the-renal-tubules
#7
Ryan M Williams, Janki Shah, Helen S Tian, Xi Chen, Frederic Geissmann, Edgar A Jaimes, Daniel A Heller
Direct targeting to the kidneys is a promising strategy to improve drug therapeutic index for the treatment of kidney diseases. We sought to investigate the renal selectivity and safety of kidney-targeted mesoscale nanoparticle technology. We found that direct intravenous administration of these particles resulted in 26-fold renal selectivity and localized negligibly in the liver or other organs. The nanoparticles targeted the renal proximal tubular epithelial cells, as evidenced by intravital microscopy and ex vivo imaging...
November 13, 2017: Hypertension
https://www.readbyqxmd.com/read/29131056/chloride-intracellular-channel-4-overexpression-in-the-proximal-tubules-of-kidneys-from-the-spontaneously-hypertensive-rat-insight-from-proteomic-analysis
#8
Diane Hatziioanou, Georgios Barkas, Elena Critselis, Jerome Zoidakis, Hariklia Gakiopoulou, Maria-Eleni Androutsou, Garyfalia Drossopoulou, Aristidis Charonis, Demetrios V Vlahakos
BACKGROUND: Hypertensive nephropathy, a leading cause of declining kidney function, is a multifactorial process not well understood. In order to elucidate biological processes and identify novel macromolecular components crucially involved in the process of kidney damage, the application of system biology approaches, like proteomics, is required. METHODS: Proteomic studies were performed using the renal parenchyma of spontaneously hypertensive rats (SHR) and their normotensive Wistar Kyoto controls...
November 7, 2017: Nephron
https://www.readbyqxmd.com/read/29128814/amphotericin-b-copper-ii-complex-alters-transcriptional-activity-of-genes-encoding-transforming-growth-factor-beta-family-members-and-related-proteins-in-renal-cells
#9
Joanna Gola, Barbara Strzałka-Mrozik, Ewa Wieczorek, Celina Kruszniewska-Rajs, Jolanta Adamska, Mariusz Gagoś, Grzegorz Czernel, Urszula Mazurek
BACKGROUND: Several chemical modifications have been developed to overcome the toxicity of amphotericin B (AmB). Oxidized forms of AmB (AmB-ox), which may occur in patient's circulation during therapy, are as toxic as AmB. Complexes with copper (II) ions (AmB-Cu(2+)) have been reported to be less toxic to human cells. Previous studies showed that AmB changed the expression of transforming growth factor-beta (TGF-β). Therefore, the objective of this study was to investigate the influence of AmB and its modified forms on the expression of genes encoding for TGF-β family members and related proteins in renal cells...
May 26, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29128560/renal-toxicity-of-nanoparticles-of-cadmium-sulphide-in-rat
#10
Kavita Rana, Yeshvandra Verma, Varsha Rani, Suresh Vir Singh Rana
During present investigations, renal toxicity of CdSNPs (cadmium sulphide nanoparticles) (ranged 5-9 nm) was estimated in rat employing specific parameters. Treatment on each alternate day for 45 days with CdSNPs (10 mg/kg b.w.) yielded significant increase in Cd-MT (cadmium metallothionein), lipid peroxidation and H2O2 generation in the kidney of rat in comparison to bulk cadmium. Concentration of creatinine also increased in urine of CdSNPs treated rats. Histopathological observations revealed extensive damage in proximal tubules...
November 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29128544/experimental-poisoning-by-vernonia-rubricaulis-in-sheep
#11
Kelly C S Godoy, Paula V Leal, Marcelo A Araújo, Alda I Souza, Arnildo Pott, Stephen T Lee, Claudio S L Barros, Ricardo A A de Lemos
In order to evaluate the susceptibility of sheep to V. rubricaulis and to establish the clinical signs, serum biochemistry, and pathological findings, eight sheep were fed varying doses of V. rubricaulis. The onset of clinical signs occurred 6-48 h after the ingestion of V. rubricaulis. Clinical courses lasted 6-56 h after the ingestion of the plant. Serum activities of aspartate aminotransferase, gamma-glutamyl transferase, and alkaline phosphatase were highly elevated and glucose blood levels were low in affected sheep...
November 8, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29126144/multi-scale-mathematical-model-of-drug-induced-proximal-tubule-injury-linking-urinary-biomarkers-to-epithelial-cell-injury-and-renal-dysfunction
#12
Yeshitila Gebremichael, James Lu, Harish Shankaran, Gabriel Helmlinger, Jerome Mettetal, K Melissa Hallow
Drug-induced nephrotoxicity is a major cause of acute kidney injury (AKI), and thus detecting the potential for nephrotoxicity early in the drug development process is critical. Various urinary biomarkers exhibit different patterns following drug-induced injury that may provide greater information than traditional biomarkers like serum creatinine. In this study, we developed a multi-scale quantitative systems pharmacology model relating drug exposure to proximal tubule (PT) epithelial cell injury, and subsequently to expression of multiple urinary biomarkers and organ-level functional changes...
November 6, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29118765/urinary-liver-type-fatty-acid-binding-protein-level-as-a-predictive-biomarker-of-acute-kidney-injury-in-patients-with-acute-decompensated-heart-failure
#13
Keiichi Hishikari, Hiroyuki Hikita, Shun Nakamura, Shun Nakagama, Masahumi Mizusawa, Tasuku Yamamoto, Junichi Doi, Yosuke Hayashi, Yuya Utsugi, Makoto Araki, Yuta Sudo, Shigeki Kimura, Atsushi Takahashi, Takashi Ashikaga, Mitsuaki Isobe
Background: There are no biological markers to predict the onset of acute kidney injury (AKI) in patients with acute decompensated heart failure (ADHF). Liver-type fatty acid-binding protein (L-FABP) levels are markedly upregulated in the proximal tubules after renal ischemia. We investigated whether urinary L-FABP is a suitable marker to predict AKI in ADHF patients. Methods: We examined 281 consecutive patients with ADHF. Serum creatinine (Cr) and L-FABP levels were measured at admission and 24 and 48 h after admission...
October 2017: Cardiorenal Medicine
https://www.readbyqxmd.com/read/29117994/role-of-adenosine-1a-receptor-signaling-on-gfr-early-after-the-induction-of-sepsis
#14
Jonathan M Street, Erik H Koritzinsky, Tiffany R Bellomo, Xuzhen Hu, Peter S T Yuen, Robert A Star
Sepsis and acute kidney injury (AKI) synergistically increase morbidity and mortality in the ICU. How sepsis reduces GFR and causes AKI is poorly understood; one proposed mechanism includes tubuloglomerular feedback (TGF). When sodium reabsorption by the proximal tubules is reduced in normal animals, the macula densa senses increased luminal sodium chloride, then adenosine 1a receptor (A1aR) signaling triggers tubuloglomerular feedback, reducing GFR through afferent arteriole vasoconstriction. We measured GFR and systemic hemodynamics early during cecal ligation and puncture-induced sepsis in wild-type and A1aR knockout mice...
November 8, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29114945/hyperglycemia-induced-by-chronic-i-p-and-oral-glucose-loading-leads-to-hypertension-through-increased-na-retention-in-proximal-tubule
#15
Selim Fakhruddin, Wael A Alanazi, Hussain N Alhamami, Karen P Briski, Keith E Jackson
Feeding animals glucose, fructose, sucrose, and fat-enriched diets can lead to diet-induced hyperglycemia, severity of which largely depends on type and concentration of nutrients used and length of dietary intervention. As a strategy of dietary intervention, we adopted glucose-enriched diet, drinking water, and intraperitoneal (i.p.) glucose injection at the dose previously determined to be effective to establish a sustained hyperglycemia over a period of 2 weeks. In our current study, we used 4 groups of Sprague Dawley rats: control, glucose-treated, glucose+tempol, and glucose+captopril-treated groups...
November 7, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29110506/mouse-population-based-evaluation-of-urinary-protein-and-mirna-biomarker-performance-associated-with-cisplatin-renal-injury
#16
Alison H Harrill, Haixia Lin, Julia Tobacyk, John C Seely
Discovery and qualification of novel biomarkers with improved specificity and sensitivity for detection of xenobiotic-induced injuries is an area of active research across multiple sectors. However, the majority of efforts in this arena have used genetically limited rodent stocks that lack variability in xenobiotic responses inherent to genetically heterogeneous human populations. In this study, genetically diverse Diversity Outbred (DO) mice were used as a surrogate for human clinical populations to investigate performance of urinary kidney biomarkers against classical preclinical kidney injury biomarkers (blood urea nitrogen [BUN] and serum creatinine)...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29109726/il-36%C3%AE-regulates-tubulointerstitial-inflammation-in-the-mouse-kidney
#17
Osamu Ichii, Junpei Kimura, Tadashi Okamura, Taro Horino, Teppei Nakamura, Hayato Sasaki, Yaser Hosny Ali Elewa, Yasuhiro Kon
IL-36α, a member of the IL-1 family, is a crucial mediator of inflammatory responses. We previously found that IL-36α was overexpressed in injured distal tubules (DTs); however, its pathological function remains unclear. Herein, unilateral ureter obstruction (UUO) or folic acid (FA) injection was performed in mouse kidneys to assess the role of IL-36α in kidney injury. IL-36α mRNA and protein expression significantly increased in the kidneys within 24 h after UUO. IL-36α localized to dilated DTs. IL-36α expression significantly correlated with the progression of tubulointerstitial cell infiltration and tubular epithelium cell death in UUO kidneys and with renal dysfunction in FA-induced acute kidney injury mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29109021/renal-organic-anion-transporters-in-drug-drug-interactions-and-diseases
#18
REVIEW
Xiaokui Huo, Kexin Liu
The kidney plays a vital role in maintaining systemic homeostasis. Active tubular secretion and reabsorption, which are mainly mediated by transporters, is an efficient mechanism for retaining glucose, amino acids, and other nutrients and for the clearance of endogenous waste products and xenobiotics. These substances are recognized by uptake transporters located in the basolateral and apical membranes of renal proximal tubule cells and are extracted from plasma and urine. Organic anion transporters (OATs) belong to the solute carrier (SLC) 22 superfamily and facilitate organic anions across the plasma membranes of renal proximal tubule cells...
November 8, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29107072/ectopic-phosphorylated-creb-marks-dedifferentiated-proximal-tubules-in-cystic-kidney-disease
#19
Pawan Puri, Caitlin M Schaefer, Daniel Bushnell, Mary E Taglienti, Jordan A Kreidberg, Bradley K Yoder, Carlton M Bates
Ectopic cAMP signaling is pathological in polycystic kidney disease; however, its spatio-temporal actions are unclear. We characterized expression of phosphorylated Creb (p-Creb), a target and mediator of cAMP signaling, in developing and cystic kidney models. We also examined tubule-specific effects of cAMP analogs in cystogenesis in embryonic kidney explants. In wild-type mice, p-Creb marked nephron progenitors (NP), early epithelial NP derivatives, ureteric bud, and cortical stroma; p-Creb was present in differentiated thick ascending limb of Henle, collecting duct, and stroma; however, it disappeared in mature NP-derived proximal tubules...
October 26, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29107023/intermittent-hypoxia-alters-dose-dependent-caffeine-effects-on-renal-prostanoids-and-receptors-in-neonatal-rats
#20
Kay D Beharry, Charles L Cai, Kultida Soontarapornchai, Taimur Ahmad, Gloria B Valencia, Jacob V Aranda
Caffeine, one of the most commonly prescribed drugs in preterm neonates, is given in standard or suprapharmacologic doses. Although known as a diuretic, its effects in the neonatal kidneys are not well studied. We tested the hypothesis that neonatal intermittent hypoxia (IH) and high caffeine doses (HCD) alter renal regulators of vasomotor tone and water balance. Newborn rats were randomized to room air, hyperoxia, or IH and treated with standard or high caffeine doses; or placebo saline. Renal prostanoids; histopathology; and cyclooxygenase (COX), prostanoid receptor, and aquaporin (AQP) immunoreactivity were determined...
October 26, 2017: Prostaglandins & Other Lipid Mediators
keyword
keyword
28677
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"