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Tubule epithelial cell

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https://www.readbyqxmd.com/read/28534445/differential-expression-of-micro-rnas-and-their-predicted-targets-in-renal-cells-exposed-to-amphotericin-b-and-its-complex-with-copper-ii-ions
#1
Joanna Magdalena Gola, Barbara Strzałka-Mrozik, Celina Kruszniewska-Rajs, Jolanta Adamska, Mariusz Gagoś, Urszula Mazurek
MicroRNAs (miRNAs) have been reported to regulate essential biological processes, and their expression was shown to be affected by pathological processes and drug-induced toxicity. Amphotericin B (AmB) can cause liver and kidney injury, but a recently developed complex of AmB with copper (II) ions (AmB-Cu(2+)) exhibits a lower toxicity to human renal cells while retaining a high antifungal activity. The aim of our study was to assess AmB-Cu(2+)- induced changes in the miRNA profile of renal cells and to examine which biological processes are significantly affected by AmB-Cu(2+)...
May 23, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28534087/interspecies-differences-in-pth-mediated-pka-phosphorylation-of-the-epithelial-calcium-channel-trpv5
#2
Mark K van Goor, Sjoerd Verkaart, Teunis J van Dam, Martijn A Huynen, Jenny van der Wijst
The epithelial calcium (Ca(2+)) channel TRPV5 (transient receptor potential vanilloid 5) is expressed in the distal convoluted tubule of the kidney and facilitates active Ca(2+) reabsorption. This process is instrumental for the maintenance of Ca(2+) homeostasis. Therefore, all aspects of TRPV5 function are tightly regulated by the calciotropic parathyroid hormone (PTH). Rabbit (rb)TRPV5 channel activity was shown to be stimulated upon PTH-mediated protein kinase A (PKA) phosphorylation. Since there is incomplete conservation of the PKA consensus motif (RR/QxT) across species, the aim of this study was to extend these findings to humans and characterize the expression and function of human (h)TRPV5...
May 22, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28531838/antimicrobial-agents-triclosan-chloroxylenol-methylisothiazolinone-and-borax-used-in-cleaning-had-genotoxic-and-histopathologic-effects-on-rainbow-trout
#3
Erol Capkin, Tuna Ozcelep, Sevki Kayis, Ilhan Altinok
Triclosan (TRC), chloroxylenol (PCMX) and methylisothiazolinone (MIT) have been commonly used as an antimicrobial in soaps while borax (BRX) is used in household cleaning. After using these chemicals, they are washed down drains and getting into the aquatic ecosystem in which they may affect aquatic living organisms. In the present study, the chronic effects of TRC, PCMX, MIT and BRX on genotoxicity, gene expression and histopathology of rainbow trout (Oncorhynchus mykiss) were evaluated for 40 days under semi static condition...
May 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28526628/heparin-based-hydrogels-induce-human-renal-tubulogenesis-in-vitro
#4
Heather M Weber, Mikhail V Tsurkan, Valentina Magno, Uwe Freudenberg, Carsten Werner
Dialysis or kidney transplantation is the only therapeutic option for end stage renal disease. Accordingly, there is a large unmet clinical need for new causative therapeutic treatments. Obtaining robust models that mimic the complex nature of the human kidney is a critical step in the development of new therapeutic strategies. Here we establish a synthetic in vitro human renal tubulogenesis model based on a tunable glycosaminoglycan-hydrogel platform. In this system, renal tubulogenesis can be modulated by the adjustment of hydrogel mechanics and degradability, growth factor signaling, and the presence of insoluble adhesion cues, potentially providing new insights for regenerative therapy...
May 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28525621/ros-induced-store-operated-ca2-entry-coupled-to-parp-1-hyperactivation-is-independent-of-parg-activity-in-necrotic-cell-death
#5
Frances M Munoz, Fengjiao Zhang, Argel Islas-Robles, Serrine S Lau, Terrence J Monks
2,3,5-tris(Glutathion-S-yl)hydroquinone (TGHQ), a potent nephrotoxic and nephrocarcinogenic metabolite of benzene and hydroquinone, generates reactive oxygen species (ROS) causing DNA strand breaks and the subsequent activation of DNA repair enzymes, including poly(ADP-ribose) polymerase (PARP)-1. Under robust oxidative DNA damage, PARP-1 is hyperactivated, resulting in the depletion of NAD+ and ATP with accompanying elevations in intracellular calcium concentrations (iCa2+), and ultimately necrotic cell death...
May 19, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28522687/integrin-linked-kinase-signaling-promotes-cyst-growth-and-fibrosis-in-polycystic-kidney-disease
#6
Archana Raman, Gail A Reif, Yuqiao Dai, Aditi Khanna, Xiaogang Li, Lindsay Astleford, Stephen C Parnell, James P Calvet, Darren P Wallace
Autosomal dominant polycystic kidney disease (ADPKD) is characterized by innumerous fluid-filled cysts and progressive deterioration of renal function. Previously, we showed that periostin, a matricellular protein involved in tissue repair, is markedly overexpressed by cyst epithelial cells. Periostin promotes cell proliferation, cyst growth, interstitial fibrosis, and the decline in renal function in PKD mice. Here, we investigated the regulation of these processes by the integrin-linked kinase (ILK), a scaffold protein that links the extracellular matrix to the actin cytoskeleton and is stimulated by periostin...
May 18, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28515173/heme-oxygenase-1-mitigates-ferroptosis-in-renal-proximal-tubule-cells
#7
Oreoluwa Adedoyin, Ravindra Boddu, Amie M Traylor, Jeremie M Lever, Subhashini Bolisetty, James George, Anupam Agarwal
Ferroptosis is an iron-dependent form of regulated, non-apoptotic cell death, which contributes to damage in models of acute kidney injury (AKI). Heme oxygenase-1 (HO-1) is a cytoprotective enzyme induced in response to cellular stress, and is protective against AKI due to its anti-apoptotic and anti-inflammatory properties. However, the role of HO-1 in regulating ferroptosis is unclear. The purpose of this study was to elucidate the role of HO-1 in regulating ferroptotic cell death in renal proximal tubule cells (PTCs)...
May 17, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28510033/the-antagonistic-effect-of-selenium-on-cadmium-induced-damage-and-mrna-levels-of-selenoprotein-genes-and-inflammatory-factors-in-chicken-kidney-tissue
#8
Xinyue Wang, Rongkun Bao, Jing Fu
Selenium (Se) is a necessary trace mineral in the diet of humans and animals. Cadmium (Cd) is a toxic heavy metal that can damage animal organs, especially the kidneys. Antagonistic interactions between Se and Cd have been reported in previous studies. However, little is known about the effects of Se against Cd toxicity and on the mRNA levels of 25 selenoprotein genes and inflammatory factors in chicken kidneys. In the current study, we fed chickens with a Se-treated, Cd-treated, or Se/Cd treated diet for 90 days...
May 16, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28495528/hepatic-ischemia-reperfusion-injury-disrupts-the-homeostasis-of-kidney-primary-cilia-via-oxidative-stress
#9
Sang Jun Han, Hee-Seong Jang, Sung Young Seu, Hee-Jung Cho, Yoon Jin Hwang, Jee In Kim, Kwon Moo Park
Acute kidney injury (AKI) is a major complication of hepatic surgeries. The primary cilium protrudes to the lumen of kidney tubules and plays an important role in renal functions. Disruption of primary cilia homeostasis is highly associated with human diseases including AKI. Here, we investigated whether transient hepatic ischemia induces length change and deciliation of kidney primary cilia, and if so, whether reactive oxygen species (ROS)/oxidative stress regulates those. HIR induced damages to the liver and kidney with increases in ROS/oxidative stress...
May 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28493713/cetuximab-prevents-methotrexate-induced-cytotoxicity-in-vitro-through-epidermal-growth-factor-dependent-regulation-of-renal-drug-transporters
#10
Pedro Caetano-Pinto, Amer Jamalpoor, Janneke Ham, Anastasia Goumenou, Monique Mommersteeg, Dirk Pijnenburg, Rob Ruijtenbeek, Natalia Sánchez-Romero, Bertrand van Zelst, Sandra Heil, Jitske Jansen, Martijn J Wilmer, Carla M L van Herpen, Rosalinde Masereeuw
The combination of methotrexate with epidermal growth factor receptor (EGFR) recombinant antibody, cetuximab, is currently being investigated in treatment of head and neck carcinoma. As methotrexate is cleared by renal excretion, we studied the effect of cetuximab on renal methotrexate handling. We used human conditionally immortalized proximal tubule epithelial cells over-expressing either organic anion transporter 1 or 3 (ciPTEC-OAT1/ciPTEC-OAT3) to examine OAT1 and OAT3, and the efflux pumps breast cancer resistance protein (BCRP), multidrug resistance protein 4 (MRP4) and P-glycoprotein (P-gp) in methotrexate handling upon EGF and/or cetuximab treatment...
May 11, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28490731/the-intestinal-tuft-cell-nanostructure-in-3d
#11
Ben Hoover, Valentina Baena, Melanie M Kaelberer, Feven Getaneh, Skarleth Chinchilla, Diego V Bohórquez
Once referred to as "peculiar," tuft cells are enigmatic epithelial cells. Here, we reasoned that future functional studies could be derived from a complete account of the tuft cell ultrastructure. We identified and documented the volumetric ultrastructure at nanometer resolution (4-5 nm/pixel) of specific intestinal tuft cells. The techniques used were Serial Block-Face (SBF) and Automated Tape-collecting Ultra-Microtome (ATUM) Scanning Electron Microscopy (SEM). Our results exposed a short (~15 µm) basal cytoplasmic process devoid of secretory vesicles...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28487282/regulation-of-spermatogenesis-by-a-local-functional-axis-in-the-testis-role-of-the-basement-membrane-derived-noncollagenous-1-domain-peptide
#12
Haiqi Chen, Dolores D Mruk, Will M Lee, C Yan Cheng
Spermatogenesis takes place in the epithelium of the seminiferous tubules of the testes, producing millions of spermatozoa per day in an adult male in rodents and humans. Thus, multiple cellular events that are regulated by an array of signaling molecules and pathways are tightly coordinated to support spermatogenesis. Here, we report findings of a local regulatory axis between the basement membrane (BM), the blood-testis barrier (BTB), and the apical ectoplasmic specialization (apical ES; a testis-specific, actin-rich adherens junction at the Sertoli cell-spermatid interface) to coordinate cellular events across the seminiferous epithelium during the epithelial cycle...
May 9, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28486600/sclt1-deficiency-causes-cystic-kidney-by-activating-erk-and-stat3-signaling
#13
Jianshuang Li, Di Lu, Huadie Liu, Bart O Williams, Paul A Overbeek, Brendan Lee, Ling Zheng, Tao Yang
Ciliopathies form a group of inherited disorders sharing several clinical manifestations due to abnormal cilia formation or function, and few treatments have been successful against these disorders. Here, we report a mouse model with mutated Sclt1 gene, which encodes a centriole distal appendage protein important for ciliogenesis. SCLT1 mutations were associated with the oral-facial-digital syndrome (OFD), an autosomal recessive ciliopathy. The Sclt1-/- mice exhibit typical ciliopathy phenotypes, including cystic kidney, cleft palate, and polydactyly...
May 9, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28485250/localization-of-trefoil-factor-family-peptide-3-in-epithelial-tissues-originating-from-the-three-germ-layers-of-developing-mouse-embryo
#14
Nikola Bijelić, Tatjana Belovari, Maja Tolušić Levak, Mirela Baus Lončar
Trefoil factor family (TFF) peptides are involved in the maintenance of epithelial integrity and epithelial restitution. Mature epithelial tissues originate from different embryonic germ layers. The objective of this research was to explore the presence and localization of TFF3 peptide in mouse embryonic epithelium and to examine if the occurrence of TFF3 is germ layer-dependent. Mouse embryos (14-18 days old) were fixed in 4% paraformaldehyde and embedded in paraffin. Immunohistochemistry was performed with affinity purified rabbit anti-TFF3 antibody, goat anti-rabbit biotinylated secondary antibody and streptavidin-horseradish peroxidase, followed by 3,3'-diaminobenzidine...
May 9, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28482796/effects-of-cold-acclimation-on-gene-expression-in-fall-field-cricket-gryllus-pennsylvanicus-ionoregulatory-tissues
#15
Lauren E Des Marteaux, Alexander H McKinnon, Hiroko Udaka, Jantina Toxopeus, Brent J Sinclair
BACKGROUND: Cold tolerance is a key determinant of temperate insect distribution and performance. Chill-susceptible insects lose ion and water homeostasis during cold exposure, but prior cold acclimation improves both cold tolerance and defense of homeostasis. The mechanisms underlying these processes are mostly unknown; cold acclimation is thought to enhance ion transport in the cold and/or prevent leak of water and ions. To identify candidate mechanisms of cold tolerance plasticity we generated transcriptomes of ionoregulatory tissues (hindgut and Malpighian tubules) from Gryllus pennsylvanicus crickets and compared gene expression in warm- and cold-acclimated individuals...
May 8, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28482176/exosomes-ultrastructural-evidence-in-epithelial-cells-of-malpighian-tubules
#16
Anita Giglio, Ida Daniela Perrotta, Pietro Brandmayr
Exosomes in Malpighian tubules of Calathus fuscipes (Coleoptera: Carabidae) were investigated under transmission electron microscopy. Ultrastructural analyses showed a wide number of multivesicular bodies localized in the apical portion of epithelial cells. Each multivesicular body encloses from 15 to 80 intraluminal vesicles (about 50nm in diameter), originating through inward budding of late endosomes that package molecules into luminal membrane-bound structures. Subsequently they are released as exosomes through exocytosis of multivesicular bodies into the extracellular space after fusion with plasma membrane...
April 29, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28468965/cell-specific-qrt-pcr-of-renal-epithelial-cells-reveals-a-novel-innate-immune-signature-in-murine-collecting-duct
#17
Vijay Saxena, David S Hains, John Ketz, Melinda Chanley, John D Spencer, Brian Becknell, Keith R Pierce, Raoul D Nelson, Jeffrey M Purkerson, George J Schwartz, Andrew L Schwaderer
The urinary tract is usually culture negative despite its close proximity to microbial flora. The precise mechanisms by which the kidneys and urinary tract defends against infection is not well understood. The initial kidney cells to encounter ascending pathogens are the collecting tubule cells which consist of principal cells (PCs) that express aquaporin 2 (AQP2) and intercalated cells (ICs) that express vacuolar H+-ATPase (V-ATPase, B1 subunit). We have previously shown that ICs are involved with the human renal innate immune defense...
May 3, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28464475/isolation-of-cd248-expressing-stromal-vascular-fraction-for-targeted-improvement-of-wound-healing
#18
Elizabeth Brett, Elizabeth R Zielins, Monica Chin, Michael Januszyk, Charles P Blackshear, Michael Findlay, Arash Momeni, Geoffrey C Gurtner, Michael T Longaker, Derrick C Wan
Wound healing remains a global issue of disability, cost, and health. Addition of cells from the stromal vascular fraction (SVF) of adipose tissue has been shown to increase the rate of full thickness wound closure. This study aimed to investigate the angiogenic mechanisms of CD248+ SVF cells in the context of full thickness excisional wounds. Single cell transcriptional analysis was used to identify and cluster angiogenic gene-expressing cells, which was then correlated with surface marker expression. SVF cells isolated from human lipoaspirate were FACS sorted based on the presence of CD248...
May 2, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28461473/ildr1-is-important-for-paracellular-water-transport-and-urine-concentration-mechanism
#19
Yongfeng Gong, Nina Himmerkus, Abby Sunq, Susanne Milatz, Cosima Merkel, Markus Bleich, Jianghui Hou
Whether the tight junction is permeable to water remains highly controversial. Here, we provide evidence that the tricellular tight junction is important for paracellular water permeation and that Ig-like domain containing receptor 1 (ILDR1) regulates its permeability. In the mouse kidney, ILDR1 is localized to tricellular tight junctions of the distal tubules. Genetic knockout of Ildr1 in the mouse kidney causes polyuria and polydipsia due to renal concentrating defects. Microperfusion of live renal distal tubules reveals that they are impermeable to water in normal animals but become highly permeable to water in Ildr1 knockout animals whereas paracellular ionic permeabilities in the Ildr1 knockout mouse renal tubules are not affected...
May 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28458455/spontaneous-nephroblastoma-with-oncocytic-differentiation-in-a-japanese-white-rabbit
#20
Osamu Katsuta, Yumi Kuriki-Yamamoto, Toru Shibata, Takaharu Mochizuki, Miwa Yoshimi, Takahisa Noto, Hidetoshi Mano
Spontaneous nephroblastoma is an uncommon tumor in laboratory rabbits. We recently encountered this tumor, and we describe its histological characteristics in this report. A male 3-year-old Japanese White rabbit (JW/kbs), maintained as a stock animal, suddenly showed poor condition and was found dead a few days later. At necropsy, a large mass was found that extended from one side of the renal pelvis. The cut surface of the mass was dark red in color and velvety to the touch. The kidney on the contralateral side was normal...
April 2017: Journal of Toxicologic Pathology
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