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Translational kidney research

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https://www.readbyqxmd.com/read/28410618/liquid-biopsy-a-step-forward-towards-precision-medicine-in-urologic-malignancies
#1
REVIEW
Ashley Di Meo, Jenni Bartlett, Yufeng Cheng, Maria D Pasic, George M Yousef
There is a growing trend towards exploring the use of a minimally invasive "liquid biopsy" to identify biomarkers in a number of cancers, including urologic malignancies. Multiple aspects can be assessed in circulating cell-free DNA, including cell-free DNA levels, integrity, methylation and mutations. Other prospective liquid biopsy markers include circulating tumor cells, circulating RNAs (miRNA, lncRNAs and mRNAs), cell-free proteins, peptides and exosomes have also emerged as non-invasive cancer biomarkers...
April 14, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28407121/urea-and-chronic-kidney-disease-the-comeback-of-the-century-in-uraemia-research
#2
Raymond Vanholder, Tessa Gryp, Griet Glorieux
Urea, a marker of uraemic retention in chronic kidney disease (CKD) and of adequacy of intradialytic solute removal, has traditionally been considered to be biologically inert. However, a number of recent experimental data suggest that urea is toxic at concentrations representative for CKD. First of all, at least five studies indicate that urea itself induces molecular changes related to insulin resistance, free radical production, apoptosis and disruption of the protective intestinal barrier. Second, urea is at the origin of the generation of cyanate, ammonia and carbamylated compounds, which as such all have been linked to biological changes...
April 12, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28401306/toolbox-in-a-tadpole-xenopus-for-kidney-research
#3
REVIEW
Maike Getwan, Soeren S Lienkamp
Xenopus is a versatile model organism increasingly used to study organogenesis and genetic diseases. The rapid embryonic development, targeted injections, loss- and gain-of-function experiments and an increasing supply of tools for functional in vivo analysis are unique advantages of the Xenopus system. Here, we review the vast array of methods available that have facilitated its transition into a translational model. We will focus primarily on how these methods have been employed in the study of kidney development, renal function and kidney disease...
April 11, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28391341/is-there-a-role-for-immunosuppression-in-immunoglobulin-a-nephropathy
#4
Ali I Al-Lawati, Heather N Reich
The most common primary glomerular disease globally is IgA nephropathy (IgAN). It is often a slowly progressive disease, and ∼40% of patients will progress to kidney failure. Due to a lack of large clinical trial networks and a lack of surrogate markers of treatment efficacy, there are relatively few large multicenter clinical trials in IgAN. Given that both the pathogenesis and progression of IgAN are linked to defects in mucosal immune regulation and inflammation, use of immunosuppression to prevent kidney failure is well founded...
January 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28296980/recent-progress-of-the-aregpkd-registry-study-on-autosomal-recessive-polycystic-kidney-disease
#5
Kathrin Ebner, Franz Schaefer, Max Christoph Liebau
Autosomal recessive polycystic kidney disease (ARPKD) is a rare monogenic disease with a severe phenotype often presenting prenatally or in early childhood. With its obligate renal and hepatic involvement, ARPKD is one of the most important indications for liver and/or kidney transplantation in childhood. Marked phenotypic variability is observed, the genetic basis of which is largely unknown. Treatment is symptomatic and largely empiric as evidence-based guidelines are lacking. Therapeutic initiatives for ARPKD face the problem of highly variable cohorts and lack of clinical or biochemical risk markers without clear-cut clinical end points...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28270932/the-krescent-program-2005-2015-an-evaluation-of-the-state-of-kidney-research-training-in-canada
#6
Kevin D Burns, Adeera Levin, Elisabeth Fowler, Leah Butcher, Marc Turcotte, Mary-Jo Makarchuk, Benoît Macaluso, Vincent Larivière, Philip M Sherman
BACKGROUND: The Kidney Research Scientist Core Education and National Training (KRESCENT) Program was launched in 2005 to enhance kidney research capacity in Canada and foster knowledge translation across the 4 themes of health research. OBJECTIVE: To evaluate the impact of KRESCENT on its major objectives and on the careers of trainees after its first 10 years. METHODS: An online survey of trainees (n = 53) who had completed or were enrolled in KRESCENT was conducted in 2015...
2017: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/28267162/multi-functional-scaling-methodology-for-translational-pharmacokinetic-and-pharmacodynamic-applications-using-integrated-microphysiological-systems-mps
#7
Christian Maass, Cynthia L Stokes, Linda G Griffith, Murat Cirit
Microphysiological systems (MPS) provide relevant physiological environments in vitro for studies of pharmacokinetics, pharmacodynamics and biological mechanisms for translational research. Designing multi-MPS platforms is essential to study multi-organ systems. Typical design approaches, including direct and allometric scaling, scale each MPS individually and are based on relative sizes not function. This study's aim was to develop a new multi-functional scaling approach for integrated multi-MPS platform design for specific applications...
April 18, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28266040/ex-vivo-porcine-organ-perfusion-models-as-a-suitable-platform-for-translational-transplant-research
#8
Rohan Kumar, Wen Yuan Chung, Ashley Robert Dennison, Giuseppe Garcea
In transplantation surgery, extending the criteria for organ donation to include organs that may have otherwise been previously discarded has provided the impetus to improve organ preservation. The traditional method of cold static storage (CS) has been tried and tested and is suitable for organs meeting standard criteria donation. Ex vivo machine perfusion is, however, associated with evidence suggesting that it may be better than CS alone and may allow for organ donation criteria to be extended. Much of our knowledge of organ preservation is derived from animal studies...
March 6, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28244683/rapamycin-treatment-dose-dependently-improves-the-cystic-kidney-in-a-new-adpkd-mouse-model-via-the-mtorc1-and-cell-cycle-associated-cdk1-cyclin-axis
#9
Ao Li, Song Fan, Yuchen Xu, Jialin Meng, Xufeng Shen, Jun Mao, Li Zhang, Xiansheng Zhang, Gilbert Moeckel, Dianqing Wu, Guanqing Wu, Chaozhao Liang
Although translational research into autosomal dominant polycystic kidney disease (ADPKD) and its pathogenesis has made considerable progress, there is presently lack of standardized animal model for preclinical trials. In this study, we developed an orthologous mouse model of human ADPKD by cross-mating Pkd2 conditional-knockout mice (Pkd2(f3) ) to Cre transgenic mice in which Cre is driven by a spectrum of kidney-related promoters. By systematically characterizing the mouse model, we found that Pkd2(f3/f3) mice with a Cre transgene driven by the mouse villin-1 promoter (Vil-Cre;Pkd2(f3/f3) ) develop overt cysts in the kidney, liver and pancreas and die of end-stage renal disease (ESRD) at 4-6 months of age...
February 28, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28238999/race-genomics-and-chronic-disease-what-patients-with-african-ancestry-have-to-say
#10
Carol R Horowitz, Kadija Ferryman, Rennie Negron, Tatiana Sabin, Mayra Rodriguez, Randi F Zinberg, Erwin Böttinger, Mimsie Robinson
BACKGROUND: Variants of the APOL1 gene increase risk for kidney failure 10-fold, and are nearly exclusively found in people with African ancestry. To translate genomic discoveries into practice, we gathered information about effects and challenges incorporating genetic risk in clinical care. METHODS: An academic-community-clinical team tested 26 adults with self-reported African ancestry for APOL1 variants, conducting in-depth interviews about patients' beliefs and attitudes toward genetic testing- before, immediately, and 30 days after receiving test results...
2017: Journal of Health Care for the Poor and Underserved
https://www.readbyqxmd.com/read/28223055/plasma-monocyte-chemotactic-protein-1-is-associated-with-acute-kidney-injury-and-death-after-cardiac-operations
#11
Dennis G Moledina, Selin Isguven, Eric McArthur, Heather Thiessen-Philbrook, Amit X Garg, Michael Shlipak, Richard Whitlock, Peter A Kavsak, Steven G Coca, Chirag R Parikh
BACKGROUND: Monocyte chemotactic protein-1 (MCP-1; chemokine C-C ligand-2 [CCL-2]) is upregulated in ischemia-reperfusion injury and is a promising biomarker of inflammation in cardiac operations. METHODS: We measured preoperative and postoperative plasma MCP-1 levels in adults undergoing cardiac operations to evaluate the association of perioperative MCP-1 levels with acute kidney injury (AKI) and death in Translational Research Investigating Biomarker Endpoints in AKI (TRIBE-AKI), a prospective, multicenter, observational cohort...
February 18, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28198734/new-frontiers-in-intravital-microscopy-of-the-kidney
#12
Andrew M Hall, Claus D Schuh, Dominik Haenni
PURPOSE OF REVIEW: Intravital imaging with multiphoton microscopy enables the detailed study of dynamic cellular processes within functioning organs in living animals, in ways that would not otherwise be possible. It therefore represents a powerful tool in translational kidney research. In this article, we will discuss several new technical developments that have significantly increased the capabilities of kidney imaging. RECENT FINDINGS: Important contemporary advances in biomedical imaging technology include longer wavelength excitation lasers, far-red emitting fluorescent reporters, highly sensitive detectors, fluorescence lifetime measurements, adaptive optics, microendoscopes, high-throughput automated analysis algorithms and tissue clearing techniques...
May 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28193503/clinical-translation-of-a-psma-inhibitor-for-99m-tc-based-spect
#13
Guillermina Ferro-Flores, Myrna Luna-Gutiérrez, Blanca Ocampo-García, Clara Santos-Cuevas, Erika Azorín-Vega, Nallely Jiménez-Mancilla, Emmanuel Orocio-Rodríguez, Jenny Davanzo, Francisco O García-Pérez
BACKGROUND: Prostate-specific membrane antigen (PSMA) is highly over-expressed in advanced prostate cancers. (68)Ga-labeled PSMA inhibitors (iPSMA) are currently used for prostate cancer detection by PET imaging. The availability of simple, efficient and reproducible radiolabeling procedures is essential for developing new SPECT radiopharmaceuticals for clinical translation. The aim of this research was to prepare (99m)Tc-EDDA/HYNIC-Lys(Nal)-Urea-Glu ((99m)Tc-EDDA/HYNIC-iPSMA) obtained from lyophilized kit formulations and evaluate the in vitro and in vivo radiopharmaceutical binding to prostate cancer cells over-expressing PSMA, as well as the (99m)Tc-EDDA/HYNIC-iPSMA normal biodistribution in humans and the preliminary uptake in patients with prostate cancer...
February 3, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28191532/the-role-of-heat-shock-proteins-in-kidney-disease
#14
REVIEW
Shobhana Nayak Rao
Heat Shock Proteins (HSP) belong to the family of intracellular proteins that are constitutively expressed and are upregulated by various stressors including heat, oxidative and chemical stress. HSP helps in reparative processes, including the refolding of damaged proteins and the removal of irreparably damaged proteins that would initiate cellular death or apoptosis. A growing body of evidence has expanded the role of HSP and defined their role in diseases such as neurodegenerative disorders, cancer, ischemic heart disease and kidney diseases...
September 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28186887/accelerated-singular-value-based-ultrasound-blood-flow-clutter-filtering-with-randomized-singular-value-decomposition-and-randomized-spatial-downsampling
#15
Pengfei Song, Joshua D Trzasko, Armando Manduca, Bo Qiang, Ramanathan Kadirvel, David F Kallmes, Shigao Chen
Singular value decomposition (SVD)-based ultrasound blood flow clutter filters have recently demonstrated substantial improvement in clutter rejection for ultrafast plane wave microvessel imaging, and have become the commonly used clutter filtering method for many novel ultrafast imaging applications such as functional ultrasound and super-resolution imaging. At present, however, the computational burden of SVD remains as a major hurdle for practical implementation and clinical translation of this method. To address this challenge, in the study we present two blood flow clutter filtering methods based on randomized SVD (rSVD) and randomized spatial downsampling to accelerate SVD clutter filtering with minimal compromise to the clutter filter performance...
April 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28184933/effects-of-different-mycotoxins-on-humans-cell-genome-and-their-involvement-in-cancer-review
#16
REVIEW
Mowaffaq Adam Ahmed Adam, Yasser M Tabana, Khirun Binti Musa, Doblin Anak Sandai
The chemical nature of most of the mycotoxins makes them highly liposoluble compounds that can be absorbed from the site of exposure such as from the gastrointestinal and respiratory tract to the blood stream where it can be dissimilated throughout the body and reach different organs such as the liver and kidneys. Mycotoxins have a strong tendency and ability to penetrate the human and animal cells and reach the cellular genome where it causes a major mutagenic change in the nucleotide sequence which leads to strong and permanent defects in the genome...
March 2017: Oncology Reports
https://www.readbyqxmd.com/read/28159816/implications-of-blood-pressure-measurement-technique-for-implementation-of-systolic-blood-pressure-intervention-trial-sprint
#17
Rajiv Agarwal
BACKGROUND: Cardiovascular morbidity and mortality was reduced by 25% when blood pressure (BP) was targeted to 120 mm Hg systolic compared with 140 mm Hg systolic in Systolic Blood Pressure Intervention Trial (SPRINT); however, BP was measured using a research technique. SPRINT specified 5 minutes of seated rest in a quiet room followed by 3 oscillometric measurements without an observer in the room. The relationship of this research-grade methodology to routine BP measurements is not known...
February 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28122942/comparative-analysis-of-mitochondrial-n-termini-from-mouse-human-and-yeast
#18
Sarah E Calvo, Olivier Julien, Karl R Clauser, Hongying Shen, Kimberli J Kamer, James A Wells, Vamsi K Mootha
The majority of mitochondrial proteins are encoded in the nuclear genome, translated in the cytoplasm, and directed to the mitochondria by an N-terminal presequence that is cleaved upon import. Recently, N-proteome catalogs have been generated for mitochondria from yeast and from human U937 cells. Here, we applied the subtiligase method to determine N-termini for 327 proteins in mitochondria isolated from mouse liver and kidney. Comparative analysis between mitochondrial N-termini from mouse, human, and yeast proteins shows that whereas presequences are poorly conserved at the sequence level, other presequence properties are extremely conserved, including a length of ∼20-60 amino acids, a net charge between +3 to +6, and the presence of stabilizing amino acids at the N-terminus of mature proteins that follow the N-end rule from bacteria...
April 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28097825/signalling-pathways-involved-in-hypoxia-induced-renal-fibrosis
#19
REVIEW
Minna Liu, Xiaoxuan Ning, Rong Li, Zhen Yang, Xiaoxia Yang, Shiren Sun, Qi Qian
Renal fibrosis is the common pathological hallmark of progressive chronic kidney disease (CKD) with diverse aetiologies. Recent researches have highlighted the critical role of hypoxia during the development of renal fibrosis as a final common pathway in end-stage kidney disease (ESKD), which joints the scientist's attention recently to exploit the molecular mechanism underlying hypoxia-induced renal fibrogenesis. The scaring formation is a multilayered cellular response and involves the regulation of multiple hypoxia-inducible signalling pathways and complex interactive networks...
January 18, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28071894/noninvasive-monitoring-of-blood-glucose-with-raman-spectroscopy
#20
Rishikesh Pandey, Santosh Kumar Paidi, Tulio A Valdez, Chi Zhang, Nicolas Spegazzini, Ramachandra Rao Dasari, Ishan Barman
The successful development of a noninvasive blood glucose sensor that can operate reliably over sustained periods of time has been a much sought after but elusive goal in diabetes management. Since diabetes has no well-established cure, control of elevated glucose levels is critical for avoiding severe secondary health complications in multiple organs including the retina, kidney and vasculature. While fingerstick testing continues to be the mainstay of blood glucose detection, advances in electrochemical sensing-based minimally invasive approaches have opened the door for alternate methods that would considerably improve the quality of life for people with diabetes...
January 10, 2017: Accounts of Chemical Research
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