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https://www.readbyqxmd.com/read/28811645/inhibin-a-and-decorin-secreted-by-human-adult-renal-stem-progenitor-cells-through-the-tlr2-engagement-induce-renal-tubular-cell-regeneration
#1
Fabio Sallustio, Claudia Curci, Alessandra Aloisi, Chiara Cristina Toma, Elisabetta Marulli, Grazia Serino, Sharon Natasha Cox, Giuseppe De Palma, Alessandra Stasi, Chiara Divella, Rosaria Rinaldi, Francesco Paolo Schena
Acute kidney injury (AKI) is a public health problem worldwide. Several therapeutic strategies have been made to accelerate recovery and improve renal survival. Recent studies have shown that human adult renal progenitor cells (ARPCs) participate in kidney repair processes, and may be used as a possible treatment to promote regeneration in acute kidney injury. Here, we show that human tubular ARPCs (tARPCs) protect physically injured or chemically damaged renal proximal tubular epithelial cells (RPTECs) by preventing cisplatin-induced apoptosis and enhancing proliferation of survived cells...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28795416/the-acute-effect-of-beta-guanidinopropionic-acid-versus-creatine-or-placebo-in-healthy-men-abc-trial-a-randomized-controlled-first-in-human-trial
#2
F A Karamat, D L Horjus, Y C Haan, L van der Woude, M C Schaap, I Oudman, G A van Montfrans, R Nieuwland, G S Salomons, J F Clark, L M Brewster
AIM: Increasing evidence indicates that the ATP-generating enzyme creatine kinase (CK) is involved in hypertension. CK rapidly regenerates ATP from creatine phosphate and ADP. Recently, we showed that beta-guanidinopropionic acid (GPA), a kidney-synthesized creatine analogue and competitive CK inhibitor, reduced blood pressure in spontaneously hypertensive rats. To further develop the substance as a potential blood pressure-lowering agent, we assessed the tolerability of a sub-therapeutic GPA dose in healthy men...
August 10, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28774079/synthesis-and-in-vitro-activity-assessment-of-novel-silicon-oxycarbide-based-bioactive-glasses
#3
Isabel Gonzalo-Juan, Rainer Detsch, Sanjay Mathur, Emanuel Ionescu, Aldo R Boccaccini, Ralf Riedel
Novel bioactive glasses based on a Ca- and Mg-modified silicon oxycarbide (SiCaMgOC) were prepared from a polymeric single-source precursor, and their in vitro activity towards hydroxyapatite mineralization was investigated upon incubating the samples in simulated body fluid (SBF) at 37 °C. The as-prepared materials exhibit an outstanding resistance against devitrification processes and maintain their amorphous nature even after exposure to 1300 °C. The X-ray diffraction (XRD) analysis of the SiCaMgOC samples after the SBF test showed characteristic reflections of apatite after only three days, indicating a promising bioactivity...
November 24, 2016: Materials
https://www.readbyqxmd.com/read/28760433/branched-chain-amino-acid-supplementation-in-treatment-of-liver-cirrhosis-updated-views-on-how-to-attenuate-their-harmful-effects-on-cataplerosis-and-ammonia-formation
#4
REVIEW
Milan Holeček
Branched-chain amino acid (BCAA; valine, leucine, and isoleucine) supplementation is common for patients with liver cirrhosis due to decreased levels of BCAA in the blood plasma of these patients, which plays a role in pathogenesis of hepatic encephalopathy and cachexia. The unique pharmacologic properties of BCAA also are a factor for use as supplementation in this population. In the present article, BCAA is shown to provide nitrogen to alpha-ketoglutarate (α-KG) for synthesis of glutamate, which is a substrate for ammonia detoxification to glutamine (GLN) in the brain and muscles...
September 2017: Nutrition
https://www.readbyqxmd.com/read/28736435/extracellular-vesicles-in-renal-disease
#5
REVIEW
Diana Karpman, Anne-Lie Ståhl, Ida Arvidsson
Extracellular vesicles, such as exosomes and microvesicles, are host cell-derived packages of information that allow cell-cell communication and enable cells to rid themselves of unwanted substances. The release and uptake of extracellular vesicles has important physiological functions and may also contribute to the development and propagation of inflammatory, vascular, malignant, infectious and neurodegenerative diseases. This Review describes the different types of extracellular vesicles, how they are detected and the mechanisms by which they communicate with cells and transfer information...
July 24, 2017: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/28735502/regenerative-medicine-in-kidney-disease-where-we-stand-and-where-to-go
#6
REVIEW
Fernanda T Borges, Nestor Schor
The kidney is a complex organ with more than 20 types of specialized cells that play an important role in maintaining the body's homeostasis. The epithelial tubular cell is formed during embryonic development and has little proliferative capacity under physiological conditions, but after acute injury the kidney does have regenerative capacity. However, after repetitive or severe lesions, it may undergo a maladaptation process that predisposes it to chronic kidney injury. Regenerative medicine includes various repair and regeneration techniques, and these have gained increasing attention in the scientific literature...
July 22, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28727410/exosomes-mediate-epithelium-mesenchyme-crosstalk-in-organ-development
#7
Nan Jiang, Lusai Xiang, Ling He, Guodong Yang, Jinxuan Zheng, Chenglin Wang, Yimei Zhang, Sainan Wang, Yue Zhou, Tzong-Jen Sheu, Jiaqian Wu, Kenian Chen, Paulo G Coelho, Nicky M Tovar, Shin Hye Kim, Mo Chen, Yan-Heng Zhou, Jeremy J Mao
Organ development requires complex signaling by cells in different tissues. Epithelium and mesenchyme interactions are crucial for the development of skin, hair follicles, kidney, lungs, prostate, major glands, and teeth. Despite myriad literature on cell-cell interactions and ligand-receptor binding, the roles of extracellular vesicles in epithelium-mesenchyme interactions during organogenesis are poorly understood. Here, we discovered that ∼100 nm exosomes were secreted by the epithelium and mesenchyme of a developing tooth organ and diffused through the basement membrane...
July 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28714420/evaluation-of-temporal-changes-in-urine-based-metabolomic-and-kidney-injury-markers-to-detect-compound-induced-acute-kidney-tubular-toxicity-in-beagle-dogs
#8
M P Wagoner, Y Yang, J E McDuffie, M Klapczynski, W Buck, L Cheatham, D Eisinger, F Sace, K M Lynch, M Sonee, J-Y Ma, Y Chen, K Marshall, M Damour, L Stephen, Y P Dragan, J Fikes, S Snook, L B Kinter
Urinary protein biomarkers and metabolomic markers have been leveraged to detect acute drug induced kidney injury (DIKI) in rats; however, the utility of these indicators to enable early detection of DIKI in canine models has not been well documented. Therefore, we evaluated temporal changes in biomarkers and metabolites in urine from male and female beagle dogs. Gentamicin-induced kidney lesions in male dogs were characterized by moderate to severe tubular epithelial cell degeneration/necrosis, epithelial cell regeneration and dilation; and a unique urine-based metabolomic fingerprint...
July 13, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28711779/hyperactive-foxo1-results-in-lack-of-tip-stalk-identity-and-deficient-microvascular-regeneration-during-kidney-injury
#9
Lan T H Dang, Takahide Aburatani, Graham A Marsh, Bryce G Johnson, Stella Alimperti, Christine J Yoon, Angela Huang, Suzanne Szak, Naoki Nakagawa, Ivan Gomez, Shuyu Ren, Sarah K Read, Chris Sparages, Alfred C Aplin, Roberto F Nicosia, Chris Chen, Giovanni Ligresti, Jeremy S Duffield
Loss of the microvascular (MV) network results in tissue ischemia, loss of tissue function, and is a hallmark of chronic diseases. The incorporation of a functional vascular network with that of the host remains a challenge to utilizing engineered tissues in clinically relevant therapies. We showed that vascular-bed-specific endothelial cells (ECs) exhibit differing angiogenic capacities, with kidney microvascular endothelial cells (MVECs) being the most deficient, and sought to explore the underlying mechanism...
July 7, 2017: Biomaterials
https://www.readbyqxmd.com/read/28704129/electromagnetic-information-transfer-through-aqueous-system
#10
Alberto Foletti, Mario Ledda, Maria Grazia Lolli, Settimio Grimaldi, Antonella Lisi
Several beneficial effects of the electromagnetic information transfer through aqueous system (EMITTAS) procedure have previously been reported in vitro. The clinical potential of this procedure has also started to be evaluated. Information flow in biological systems can be investigated through chemical and molecular approaches or by a biophysical approach focused on endogenous electrodynamic activities. Electromagnetic signals are endogenously generated at different levels of the biological organization and, likely, play an active role in synchronizing internal cell function or local/systemic adaptive response...
July 13, 2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/28699526/hydrogel-based-cell-therapies-for-kidney-regeneration-current-trends-in-biofabrication-and-in-vivo-repair
#11
Katja Jansen, Carl C L Schuurmans, Jitske Jansen, Rosalinde Masereeuw, Tina Vermonden
Facing the problems of limited renal regeneration capacity and the persistent shortage of donor kidneys, dialysis remains the only treatment option for many end-stage renal disease patients. Unfortunately, dialysis is only a medium-term solution because large and protein-bound uremic solutes are not efficiently cleared from the body and lead to disease progression over time. Current strategies for improved renal replacement therapies (RRTs) range from whole organ engineering to biofabrication of renal assist devices and biological injectables for in vivo regeneration...
July 10, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28698077/examination-of-in-vitro-and-in-vivo-biocompatibility-of-alginate-hyaluronic-acid-microbeads-as-a-promising-method-in-cell-delivery-for-kidney-regeneration
#12
Jhaleh Amirian, Tran Thi Tuong Van, Sang-Ho Bae, Hae-Il Jung, Hwan-Jun Choi, Hyun-Deuk Cho, Byong-Taek Lee
In this study, alginate (ALG) and alginate-hyaluronic acid (ALG-HA) injectable microbeads, with the purpose of delivering stem cells for tissue engineering, were prepared by a spraying method into a CaCl2 solution that shows high porosity for the exchange of nutrition and waste. In addition, the size distribution and surface morphology was investigated using optical and scanning electron microscopy, respectively. The chemical structural properties of the ALG-HA microbeads were examined by Fourier transform infrared spectroscopy...
July 8, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28688581/persistent-and-inducible-neogenesis-repopulates-progenitor-renin-lineage-cells-in-the-kidney
#13
Linda Hickmann, Anne Steglich, Michael Gerlach, Moath Al-Mekhlafi, Jan Sradnick, Peter Lachmann, Maria Luisa S Sequeira-Lopez, R Ariel Gomez, Bernd Hohenstein, Christian Hugo, Vladimir T Todorov
Renin lineage cells (RLCs) serve as a progenitor cell reservoir during nephrogenesis and after renal injury. The maintenance mechanisms of the RLC pool are still poorly understood. Since RLCs were also identified as a progenitor cell population in bone marrow we first considered that these may be their source in the kidney. However, transplantation experiments in adult mice demonstrated that bone marrow-derived cells do not give rise to RLCs in the kidney indicating their non-hematopoietic origin. Therefore we tested whether RLCs develop in the kidney through neogenesis (de novo differentiation) from cells that have never expressed renin before...
July 6, 2017: Kidney International
https://www.readbyqxmd.com/read/28684664/mesenchymal-stem-stromal-cell-derived-extracellular-vesicles-and-their-potential-as-novel-immunomodulatory-therapeutic-agents
#14
REVIEW
Verena Börger, Michel Bremer, Rita Ferrer-Tur, Lena Gockeln, Oumaima Stambouli, Amina Becic, Bernd Giebel
Extracellular vesicles (EVs), such as exosomes and microvesicles, have been identified as mediators of a newly-discovered intercellular communication system. They are essential signaling mediators in various physiological and pathophysiological processes. Depending on their origin, they fulfill different functions. EVs of mesenchymal stem/stromal cells (MSCs) have been found to promote comparable therapeutic activities as MSCs themselves. In a variety of in vivo models, it has been observed that they suppress pro-inflammatory processes and reduce oxidative stress and fibrosis...
July 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28682572/carmelo-giordano-1930-2016-a-giant-in-nephrology
#15
Natale De Santo, Carlo De Pascale, Ernesto Quarto, Malcolm E Phillips, Biagio Di Iorio
Carmelo Giordano (Carmine, Louis, Joseph Giordano) was born in Naples on August 23, 1930 in the house of Rafael and Anna Tirone He received the MD cum laude in 1954. He was Fellow and assistant to Professor Flaviano Magrassi and studied nephrology at the Peter Bent Brigham Hospital, University of Harvard in Boston, under the guidance of John P. Merrill (1958-1960). He was nominated Professor of Nephrology at the University Federico II, Naples in 1975 and Professor of Medicine at the Second University of Naples (1986-2002)...
April 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28674665/local-application-of-osteoprotegerin-chitosan-gel-in-critical-sized-defects-in-a-rabbit-model
#16
Soher N Jayash, Najihah M Hashim, Misni Misran, N A Baharuddin
BACKGROUND: Osteoprotegerin (OPG) is used for the systemic treatment of bone diseases, although it has many side effects. The aim of this study was to investigate a newly formulated OPG-chitosan gel for local application to repair bone defects. Recent studies have reported that immunodetection of osteopontin (OPN) and osteocalcin (OC) can be used to characterise osteogenesis and new bone formation. METHODS: The osteogenic potential of the OPG-chitosan gel was evaluated in rabbits...
2017: PeerJ
https://www.readbyqxmd.com/read/28671689/reconstruction-of-the-mouse-extrahepatic-biliary-tree-using-primary-human-extrahepatic-cholangiocyte-organoids
#17
Fotios Sampaziotis, Alexander W Justin, Olivia C Tysoe, Stephen Sawiak, Edmund M Godfrey, Sara S Upponi, Richard L Gieseck, Miguel Cardoso de Brito, Natalie Lie Berntsen, María J Gómez-Vázquez, Daniel Ortmann, Loukia Yiangou, Alexander Ross, Johannes Bargehr, Alessandro Bertero, Mariëlle C F Zonneveld, Marianne T Pedersen, Matthias Pawlowski, Laura Valestrand, Pedro Madrigal, Nikitas Georgakopoulos, Negar Pirmadjid, Gregor M Skeldon, John Casey, Wenmiao Shu, Paulina M Materek, Kirsten E Snijders, Stephanie E Brown, Casey A Rimland, Ingrid Simonic, Susan E Davies, Kim B Jensen, Matthias Zilbauer, William T H Gelson, Graeme J Alexander, Sanjay Sinha, Nicholas R F Hannan, Thomas A Wynn, Tom H Karlsen, Espen Melum, Athina E Markaki, Kourosh Saeb-Parsy, Ludovic Vallier
The treatment of common bile duct (CBD) disorders, such as biliary atresia or ischemic strictures, is restricted by the lack of biliary tissue from healthy donors suitable for surgical reconstruction. Here we report a new method for the isolation and propagation of human cholangiocytes from the extrahepatic biliary tree in the form of extrahepatic cholangiocyte organoids (ECOs) for regenerative medicine applications. The resulting ECOs closely resemble primary cholangiocytes in terms of their transcriptomic profile and functional properties...
August 2017: Nature Medicine
https://www.readbyqxmd.com/read/28620747/amniotic-fluid-cells-current-progress-and-emerging-challenges-in-renal-regeneration
#18
REVIEW
Stefano Da Sacco, Laura Perin, Sargis Sedrakyan
Amniotic fluid (AF) contains a heterogeneous population of cells that have been identified to possess pluripotent and progenitor-like characteristics. These cells have been applied in various regenerative medicine applications ranging from in vitro cell differentiation to tissue engineering to cellular therapies for different organs including the heart, the liver, the lung, and the kidneys. In this review, we examine the different methodologies used for the derivation of amniotic fluid stem cells and renal progenitors, and their application in renal repair and regeneration...
June 15, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28620603/advances-in-the-knowledge-about-kidney-decellularization-and-repopulation
#19
REVIEW
Afrânio Côgo Destefani, Gabriela Modenesi Sirtoli, Breno Valentim Nogueira
End-stage renal disease (ESRD) is characterized by the progressive deterioration of renal function that may compromise different tissues and organs. The major treatment indicated for patients with ESRD is kidney transplantation. However, the shortage of available organs, as well as the high rate of organ rejection, supports the need for new therapies. Thus, the implementation of tissue bioengineering to organ regeneration has emerged as an alternative to traditional organ transplantation. Decellularization of organs with chemical, physical, and/or biological agents generates natural scaffolds, which can serve as basis for tissue reconstruction...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28616151/therapeutic-potential-of-dental-stem-cells
#20
REVIEW
Elna Paul Chalisserry, Seung Yun Nam, Sang Hyug Park, Sukumaran Anil
Stem cell biology has become an important field in regenerative medicine and tissue engineering therapy since the discovery and characterization of mesenchymal stem cells. Stem cell populations have also been isolated from human dental tissues, including dental pulp stem cells, stem cells from human exfoliated deciduous teeth, stem cells from apical papilla, dental follicle progenitor cells, and periodontal ligament stem cells. Dental stem cells are relatively easily obtainable and exhibit high plasticity and multipotential capabilities...
January 2017: Journal of Tissue Engineering
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