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https://www.readbyqxmd.com/read/28932931/usefulness-of-zebrafish-larvae-to-evaluate-drug-induced-functional-and-morphological-renal-tubular-alterations
#1
Rita Gorgulho, Raquel Jacinto, Susana S Lopes, Sofia A Pereira, Erin M Tranfield, Gabriel G Martins, Emilio J Gualda, Rico J E Derks, Ana C Correia, Evelyne Steenvoorden, Petra Pintado, Oleg A Mayboroda, Emilia C Monteiro, Judit Morello
Prediction and management of drug-induced renal injury (DIRI) rely on the knowledge of the mechanisms of drug insult and on the availability of appropriate animal models to explore it. Zebrafish (Danio rerio) offers unique advantages for assessing DIRI because the larval pronephric kidney has a high homology with its human counterpart and it is fully mature at 3.5 days post-fertilization. Herein, we aimed to evaluate the usefulness of zebrafish larvae as a model of renal tubular toxicity through a comprehensive analysis of the renal alterations induced by the lethal concentrations for 10% of the larvae for gentamicin, paracetamol and tenofovir...
September 20, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28923372/in-vitro-tubulogenesis-of-madin-darby-canine-kidney-mdck-spheroids-occurs-depending-on-constituent-cell-number-and-scaffold-gel-concentration
#2
Tsuyoshi Hirashima, Miho Hoshuyama, Taiji Adachi
In vitro tubulogenesis has been employed as an experimental model system to study tissue morphogenesis of internal organs. It has been previously shown that Madin-Darby canine kidney (MDCK) cells form tubes in the presence of hepatocyte growth factor in 3D cultures. Although these cells are expected to form tube structures in some microenvironments independent of chemical stimulation, little is known about the cellular mechanisms in organizing such an anisotropic multicellular structure. Here, we report 3D culture conditions that induce MDCK tubulogenesis without growth factor stimulation...
September 15, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28904193/mutations-in-the-fusion-protein-of-measles-virus-that-confer-resistance-to-the-membrane-fusion-inhibitors-carbobenzoxy-d-phe-l-phe-gly-and-as-48
#3
Michael N Ha, Sébastien Delpeut, Ryan S Noyce, Gary Sisson, Karen M Black, Liang-Tzung Lin, Darius Bilimoria, Richard K Plemper, Gilbert G Privé, Christopher D Richardson
The inhibitors Z-d-Phe-l-Phe Gly (fusion inhibitor peptide, FIP) and AS-48 have similar efficacy in blocking membrane fusion and syncytia formation mediated by measles virus. Other homologues such as Z-d-Phe are less effective, but may act through the same mechanism. In an attempt to map the site of action of these inhibitors, we generated mutant viruses which were resistant to the inhibitory effects of Z-d-Phe-l-Phe Gly. These 10 mutations were localized to the heptad repeat region (HRB) of the fusion protein and no changes were observed in the viral hemagglutinin, which is the receptor attachment protein...
September 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28892098/correlation-between-e-cadherin-interactions-survivin-expression-and-apoptosis-in-mdck-and-ts-src-mdck-cell-culture-models
#4
Janne Capra, Sinikka Eskelinen
Survivin, a member of inhibitor of apoptosis (IAP) protein family, is a multifunctional protein expressed in most cancers. In addition to inhibition of apoptosis, it regulates proliferation and promotes migration. Its presence and function in cells is strongly regulated via transcription factors, intracellular localization, and degradation. We analyzed the presence of survivin at protein level in various culture environments and under activation of Src tyrosine kinase in epithelial canine kidney MDCK cells in order to elucidate factors controlling survivin 'lifespan'...
September 11, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28845941/-ultrasound-guided-percutaneous-cryoablation-of-renal-tumors
#5
D V Enikeev, P V Glybochko, Yu G Alyaev, L M Rapoport, A V Amosov, T M Alekseeva, M E Enikeev, D G Tsarichenko, D V Chinenov, L D Kozmin, Z K Dzhalaev, M S Taratkin
INTRODUCTION: Surgery remains the gold-standard curative treatment for localized (T1) renal carcinoma. However, recent medical-technological advances have led to the development of new minimally invasive treatment options, one of which is percutaneous cryoablation. AIM: To assess the effectiveness and safety of ultrasound-guided percutaneous cryoablation of renal tumors. MATERIALS AND METHODS: The study comprised 12 patients aged 52 to 76 years who underwent ultrasound-guided percutaneous cryoablation of renal tumors from 2015 to 2017...
July 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28819176/use-of-biocompatible-sorafenib-gold-nanoconjugates-for-reversal-of-drug-resistance-in-human-hepatoblatoma-cells
#6
Sandeep Kumar Vishwakarma, Priyanka Sharmila, Avinash Bardia, Lakkireddy Chandrakala, N Raju, G Sravani, B V S Sastry, Md Aejaz Habeeb, Aleem Ahmed Khan, Marshal Dhayal
The present study identifies the potential of highly biocompatible SF-GNP nano-conjugate to enhance the chemotherapeutic response to combat drug resistance in cancer cells. We developed a stable colloidal suspension of sorafenib-gold nanoconjugate (SF-GNP) of <10 nm size in aqueous medium for reverting the cancer drug resistance in SF-resistant HepG2 cells in a 3D ex-vivo model system. In-vivo biocompatibility assay of SF-GNPs showed absence of systemic toxicological effects including hematological, biochemical and histological parameters...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815607/a-3d-tri-culture-system-reveals-that-activin-receptor-like-kinase-5-and-connective-tissue-growth-factor-drive-human-glomerulosclerosis
#7
John P Waters, Yvonne C Richards, Jeremy N Skepper, Mark Southwood, Paul D Upton, Nicholas W Morrell, Jordan S Pober, John R Bradley
Glomerular scarring, known as glomerulosclerosis, occurs in many chronic kidney diseases and involves interaction between glomerular endothelial cells (GEC), podocytes and mesangial cells (MCs), leading to signals that promote extracellular matrix deposition and endothelial cell dysfunction and loss. We describe a 3D tri-culture system to model human glomerulosclerosis. In 3D monoculture, each cell type alters its phenotype in response to TGFβ, which has been implicated as an important mediator of glomerulosclerosis...
August 16, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28812157/augmented-reality-in-a-tumor-resection-model
#8
Pauline Chauvet, Toby Collins, Clement Debize, Lorraine Novais-Gameiro, Bruno Pereira, Adrien Bartoli, Michel Canis, Nicolas Bourdel
BACKGROUND: Augmented Reality (AR) guidance is a technology that allows a surgeon to see sub-surface structures, by overlaying pre-operative imaging data on a live laparoscopic video. Our objectives were to evaluate a state-of-the-art AR guidance system in a tumor surgical resection model, comparing the accuracy of the resection with and without the system. Our system has three phases. Phase 1: using the MRI images, the kidney's and pseudotumor's surfaces are segmented to construct a 3D model...
August 15, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28741858/a-computational-approach-for-inferring-the-cell-wall-properties-that-govern-guard-cell-dynamics
#9
Hugh C Woolfenden, Gildas Bourdais, Michaela Kopischke, Eva Miedes, Antonio Molina, Silke Robatzek, Richard J Morris
Guard cells dynamically adjust their shape in order to regulate photosynthetic gas exchange, respiration rates and defend against pathogen entry. Cell shape changes are determined by the interplay of cell wall material properties and turgor pressure. To investigate this relationship between turgor pressure, cell wall properties and cell shape, we focused on kidney-shaped stomata and developed a biomechanical model of a guard cell pair. Treating the cell wall as a composite of the pectin-rich cell wall matrix embedded with cellulose microfibrils, we show that strong, circumferentially oriented fibres are critical for opening...
July 25, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28707625/bioprinting-of-functional-vascularized-mouse-thyroid-gland-construct
#10
Elena A Bulanova, Elizaveta V Koudan, Jonathan Degosserie, Charlotte Heymans, Frederico DAS Pereira, Vladislav A Parfenov, Yi Sun, Qi Wang, Suraya A Akhmedova, Irina K Sviridova, Natalia S Sergeeva, Georgy A Frank, Yusef D Khesuani, Christophe E Pierreux, Vladimir A Mironov
Bioprinting can be defined as additive biofabrication of 3D tissues and organ constructs using tissue spheroids, capable of self-assembly, as building blocks. Thyroid gland, a relatively simple endocrine organ, is suitable for testing the proposed bioprinting technology. Here we report the bioprinting of functional vascularized mouse thyroid gland construct from embryonic tissue spheroids as a proof of concept. Based on the self-assembly principle, we generated thyroid tissue starting from thyroid spheroids (TS) and allantoic spheroids (AS), as a source of thyrocytes and endothelial cells (EC), respectively...
July 14, 2017: Biofabrication
https://www.readbyqxmd.com/read/28704481/renal-auto-transplantation-promotes-cortical-microvascular-network-remodeling-in-a-preclinical-porcine-model
#11
Souleymane Maïga, Geraldine Allain, Thierry Hauet, Jerome Roumy, Edouard Baulier, Michel Scepi, Manuel Dierick, Luc Van Hoorebeke, Patrick Hannaert, Franck Guy, Frederic Favreau
The vascular network is a major target of ischemia-reperfusion, but has been poorly investigated in renal transplantation. The aim of this study was to characterize the remodeling of the renal vascular network that follows ischemia-reperfusion along with the most highly affected cortex section in a preclinical renal transplantation model. There were two experimental groups. The first was a grafted kidney group consisting of large white pigs for which the left kidney was harvested, cold flushed, preserved for 24 h in the University of Wisconsin's preservation solution, and then auto-transplanted (n = 5); the right kidney was removed to mimic the situation of human kidney transplantation...
2017: PloS One
https://www.readbyqxmd.com/read/28686597/altered-paracellular-cation-permeability-due-to-a-rare-cldn10b-variant-causes-anhidrosis-and-kidney-damage
#12
Joakim Klar, Jörg Piontek, Susanne Milatz, Muhammad Tariq, Muhammad Jameel, Tilman Breiderhoff, Jens Schuster, Ambrin Fatima, Maria Asif, Muhammad Sher, Katrin Mäbert, Anja Fromm, Shahid M Baig, Dorothee Günzel, Niklas Dahl
Claudins constitute the major component of tight junctions and regulate paracellular permeability of epithelia. Claudin-10 occurs in two major isoforms that form paracellular channels with ion selectivity. We report on two families segregating an autosomal recessive disorder characterized by generalized anhidrosis, severe heat intolerance and mild kidney failure. All affected individuals carry a rare homozygous missense mutation c.144C>G, p.(N48K) specific for the claudin-10b isoform. Immunostaining of sweat glands from patients suggested that the disease is associated with reduced levels of claudin-10b in the plasma membranes and in canaliculi of the secretory portion...
July 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28656614/automatic-renal-segmentation-for-mr-urography-using-3d-grabcut-and-random-forests
#13
Umit Yoruk, Brian A Hargreaves, Shreyas S Vasanawala
PURPOSE: To introduce and evaluate a fully automated renal segmentation technique for glomerular filtration rate (GFR) assessment in children. METHODS: An image segmentation method based on iterative graph cuts (GrabCut) was modified to work on time-resolved 3D dynamic contrast-enhanced MRI data sets. A random forest classifier was trained to further segment the renal tissue into cortex, medulla, and the collecting system. The algorithm was tested on 26 subjects and the segmentation results were compared to the manually drawn segmentation maps using the F1-score metric...
June 27, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28644734/high-throughput-phenotypic-screening-of-kinase-inhibitors-to-identify-drug-targets-for-polycystic-kidney-disease
#14
Tijmen H Booij, Hester Bange, Wouter N Leonhard, Kuan Yan, Michiel Fokkelman, Steven J Kunnen, Johannes G Dauwerse, Yu Qin, Bob van de Water, Gerard J P van Westen, Dorien J M Peters, Leo S Price
Polycystic kidney disease (PKD) is a prevalent disorder characterized by renal cysts that lead to kidney failure. Various signaling pathways have been targeted to stop disease progression, but most interventions still focus on alleviating PKD-associated symptoms. The mechanistic complexity of the disease, as well as the lack of functional in vitro assays for compound testing, has made drug discovery for PKD challenging. To identify modulators of PKD, Pkd1(-/-) kidney tubule epithelial cells were applied to a scalable and automated 3D cyst culture model for compound screening, followed by phenotypic profiling to determine compound efficacy...
September 2017: SLAS Discovery
https://www.readbyqxmd.com/read/28643936/phenotypic-analysis-of-organoids-by-proteomics
#15
REVIEW
Alexis Gonneaud, Claude Asselin, François Boudreau, François-Michel Boisvert
The development of 3D cell cultures into self-organizing organ-like structures named organoids provides a model that better reflects in vivo organ physiology and their functional properties. Organoids have been established from several organs, such as the intestine, prostate, brain, liver, kidney and pancreas. With recent advances in high-throughput and -omics profiling technologies, it is now possible to study the mechanisms of cellular organisation at the systems level. It is therefore not surprising that these methods are now used to characterize organoids at the transcriptomic, proteomic, chromatin state and transcription factor DNA-binding levels...
June 23, 2017: Proteomics
https://www.readbyqxmd.com/read/28615647/differential-synchrotron-x-ray-imaging-markers-based-on-the-renal-microvasculature-for-tubulointerstitial-lesions-and-glomerulopathy
#16
Yu-Chuan Lin, Yeukuang Hwu, Guo-Shu Huang, Michael Hsiao, Tsung-Tse Lee, Shun-Min Yang, Ting-Kuo Lee, Nan-Yow Chen, Sung-Sen Yang, Ann Chen, Shuk-Man Ka
High resolution synchrotron microtomography capable of revealing microvessels in three dimensional (3D) establishes distinct imaging markers of mouse kidney disease strongly associated to renal tubulointerstitial (TI) lesions and glomerulopathy. Two complementary mouse models of chronic kidney disease (CKD), unilateral ureteral obstruction (UUO) and focal segmental glomerulosclerosis (FSGS), were used and five candidates of unique 3D imaging markers were identified. Our characterization to differentially reflect the altered microvasculature of renal TI lesions and/or glomerulopathy demonstrated these image features can be used to differentiate the disease status and the possible cause therefore qualified as image markers...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28599598/uniform-neural-tissue-models-produced-on-synthetic-hydrogels-using-standard-culture-techniques
#17
Christopher Barry, Matthew T Schmitz, Nicholas E Propson, Zhonggang Hou, Jue Zhang, Bao K Nguyen, Jennifer M Bolin, Peng Jiang, Brian E McIntosh, Mitchell D Probasco, Scott Swanson, Ron Stewart, James A Thomson, Michael P Schwartz, William L Murphy
The aim of the present study was to test sample reproducibility for model neural tissues formed on synthetic hydrogels. Human embryonic stem (ES) cell-derived precursor cells were cultured on synthetic poly(ethylene glycol) (PEG) hydrogels to promote differentiation and self-organization into model neural tissue constructs. Neural progenitor, vascular, and microglial precursor cells were combined on PEG hydrogels to mimic developmental timing, which produced multicomponent neural constructs with 3D neuronal and glial organization, organized vascular networks, and microglia with ramified morphologies...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28587402/establishment-and-evaluation-of-a-reversible-two-kidney-one-clip-renovascular-hypertensive-rat-model
#18
Li-Qiang Li, Jian Zhang, Rong Wang, Jian-Xin Li, Yong-Quan Gu
The aim of the present study was to establish and evaluate a novel and reversible two-kidney, one-clip renovascular hypertensive rat model with a titanium vascular clip. A total of 40 male Sprague-Dawley rats were evenly and randomly divided into a sham-operated group, and 3, 7, 12 and 28D groups (namely removing the vascular clip in the renovascular hypertensive model after 3, 7, 12 and 28 days, respectively). The systolic blood pressure (SBP) and plasma renin activity (PRA) were measured, and color duplex imaging was conducted before placing the clips, as well as before and after removing them...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28534535/the-potential-of-organoids-in-urological-cancer-research
#19
REVIEW
Shangqian Wang, Dong Gao, Yu Chen
Technical advances in the development of organoid systems enable cell lines, primary adult cells, or stem or progenitor cells to develop into diverse, multicellular entities, which can self-renew, self-organize, and differentiate. These 3D organoid cultures have proven to be of value in increasing our understanding of the biology of disease and offer the potential of regenerative and genetic therapies. The successful application of 3D organoids derived from adult tissue into urological cancer research can further our understanding of these diseases and could also provide preclinical cancer models to realize the precision medicine paradigm by therapeutic screening of individual patient samples ex vivo...
July 2017: Nature Reviews. Urology
https://www.readbyqxmd.com/read/28520334/kidney-anatomy-three-dimensional-3d-printed-pelvicalyceal-system-models-of-the-collector-system-improve-the-diagnosis-and-treatment-of-stone-disease
#20
EDITORIAL
Luciano A Favorito
No abstract text is available yet for this article.
May 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
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