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Regenerative medicin

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https://www.readbyqxmd.com/read/27936164/transcriptome-and-metabolome-analyses-in-exogenous-fabp4-and-fabp5-treated-adipose-derived-stem-cells
#1
Tokunori Yamamoto, Masato Furuhashi, Takeshi Sugaya, Tsuyoshi Oikawa, Megumi Matsumoto, Yasuhito Funahashi, Yoshihisa Matsukawa, Momokazu Gotoh, Tetsuji Miura
Adipose-derived stem cells (ADSC), which exist near adipocytes in adipose tissue, have been used as a potential tool of regenerative medicine. Lipid chaperones, fatty acid-binding protein 4 (FABP4) and 5 (FABP5), are abundantly expressed in adipocytes. FABP4 has recently been shown to be secreted from adipocytes during lipolysis in a non-classical pathway and may act as an adipokine. Here, we investigated the role of exogenous FABP4 and FABP5 in transcriptional and metabolic regulation in ADSC. FABP4 and FABP5 were little expressed in ADSC...
2016: PloS One
https://www.readbyqxmd.com/read/27936076/angiogenic-capacity-of-periodontal-ligament-stem-cells-pretreated-with-deferoxamine-and-or-fibroblast-growth-factor-2
#2
Jessica Ratajczak, Petra Hilkens, Pascal Gervois, Esther Wolfs, Reinhilde Jacobs, Ivo Lambrichts, Annelies Bronckaers
Periodontal ligament stem cells (PDLSCs) represent a good source of multipotent cells for cell-based therapies in regenerative medicine. The success rate of these treatments is severely dependent on the establishment of adequate vasculature in order to provide oxygen and nutrients to the transplanted cells. Pharmacological preconditioning of stem cells has been proposed as a promising method to augment their therapeutic efficacy. In this study, the aim was to improve the intrinsic angiogenic properties of PDLSCs by in vitro pretreatment with deferoxamine (DFX; 100μM), fibroblast growth factor-2 (FGF-2; 10ng/mL) or both substances combined...
2016: PloS One
https://www.readbyqxmd.com/read/27935285/mechanical-testing-of-engineered-spider-silk-filaments-provides-insights-into-molecular-features-on-a-meso-scale
#3
Gregor Lang, Benedikt Richard Neugirg, Daniel Kluge, Andreas Fery, Thomas Scheibel
Spider dragline silk shows the highest toughness in comparison to all other known natural or man-made fibers. Despite a broad experimental foundation concerning the macroscopic silk thread properties as well as a thorough simulation-based molecular understanding, the impact of the mesoscale building blocks, namely nano-/submicron-sized filaments, on the mechanical properties of the threads remains the missing link. Here, we illustrate the function of these meso-scaled building blocks using electrospun fibers made of a recombinant spider silk protein and show the impact of β-sheet content and fiber hydration on their mechanical performance...
December 9, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27934940/accelerated-craniofacial-bone-regeneration-through-dense-collagen-gel-scaffolds-seeded-with-dental-pulp-stem-cells
#4
Frédéric Chamieh, Anne-Margaux Collignon, Benjamin R Coyac, Julie Lesieur, Sandy Ribes, Jérémy Sadoine, Annie Llorens, Antonino Nicoletti, Didier Letourneur, Marie-Laure Colombier, Showan N Nazhat, Philippe Bouchard, Catherine Chaussain, Gael Y Rochefort
Therapies using mesenchymal stem cell (MSC) seeded scaffolds may be applicable to various fields of regenerative medicine, including craniomaxillofacial surgery. Plastic compression of collagen scaffolds seeded with MSC has been shown to enhance the osteogenic differentiation of MSC as it increases the collagen fibrillary density. The aim of the present study was to evaluate the osteogenic effects of dense collagen gel scaffolds seeded with mesenchymal dental pulp stem cells (DPSC) on bone regeneration in a rat critical-size calvarial defect model...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27932383/comparison-of-the-glycosphingolipids-of-human-induced-pluripotent-stem-cells-and-human-embryonic-stem-cells
#5
Karin Säljö, Angela Barone, Dzeneta Vizlin-Hodzic, Bengt R Johansson, Michael E Breimer, Keiko Funa, Susann Teneberg
High expectations are held for human-induced pluripotent stem cells (hiPSC) since they are established from autologous tissues thus overcoming the risk of allogeneic immune rejection when used in regenerative medicine. However, little is known regarding the cell-surface carbohydrate antigen profile of hiPSC compared with human embryonic stem cells (hESC). Here, glycosphingolipids were isolated from an adipocyte-derived hiPSC line, and hiPSC and hESC glycosphingolipids were compared by concurrent characterization by binding assays with carbohydrate-recognizing ligands and mass spectrometry...
December 8, 2016: Glycobiology
https://www.readbyqxmd.com/read/27931516/expansion-of-hair-follicle-stem-cells-sticking-to-isolated-sebaceous-glands-to-generate-in-vivo-epidermal-structures
#6
Huishan Zhang, Huashan Zhao, Jingqiao Qiao, Shoubing Zhang, Shuang Liu, Na Li, Xiaohua Lei, Lina Ning, Yujing Cao, Enkui Duan
Hair follicle stem cells (HFSCs) are considered one of the useful donor cell types for skin regenerative medicine owing to their robust proliferative capacity and multipotency. However, methods for easily and effectively obtaining HFSCs from a limited skin biopsy are still lacking. Here we report a novel approach for obtaining a subpopulation of HFSCs from a small skin sample from the rat tail, which uses the sebaceous glands (SGs) to capture the adjacent HFSCs. By means of organ culture, keratinocytes were expanded from the detached SGs, which also included adherent HFSCs from the hair follicle that could be passaged at the single-cell level...
November 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27930878/heterogeneity-of-%C3%AE-cells
#7
Shoen Kume
Loss of β-cell mass and function leads to the pathogenesis of type 1 and type 2 diabetes. β-cell neogenesis from endogenous progenitor pools is expected as a potential cell source for the treatment of diabetes. However, the existence of β-cell progenitors was challenged by Dor et al(1) , that self-replication of pre-existing β-cells is the major mechanism for β-cell regeneration. Our knowledge of the pancreatic β-cells would lead to a better understanding and manipulation of the maturation or proliferation of β-cells for regenerative medicine...
December 8, 2016: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/27928505/collagen-a-network-for-regenerative-medicine
#8
REVIEW
K M Pawelec, S M Best, R E Cameron
The basic building block of the extra-cellular matrix in native tissue is collagen. As a structural protein, collagen has an inherent biocompatibility making it an ideal material for regenerative medicine. Cellular response, mediated by integrins, is dictated by the structure and chemistry of the collagen fibers. Fiber formation, via fibrillogenesis, can be controlled in vitro by several factors: pH, ionic strength, and collagen structure. After formation, fibers are stabilized via cross-linking. The final bioactivity of collagen scaffolds is a result of both processes...
October 28, 2016: Journal of Materials Chemistry. B, Materials for Biology and Medicine
https://www.readbyqxmd.com/read/27927069/efficient-differentiation-of-tbx18-wt1-epicardial-like-cells-from-human-pluripotent-stem-cells-using-small-molecular-compounds
#9
Yue Ma, Jianmin Zhao, Henghua Cao, Luyang Tian, Weibang Huo, Kui Zhai, Pei Wang, Guangju Ji
The epicardium promotes neovascularization and cardiomyocyte regeneration by generating vascular smooth muscle cells (SMCs) and producing regenerative factors after adult heart infarction. It is therefore a potential cell resource for repair of the injured heart. However, the epicardium also participates in fibrosis and scarring of the injured heart, complicating its use in regenerative medicine. Here, we report co-expression of TBX18 and WT1 in the majority of epicardial cells during mouse embryonic epicardial development...
December 7, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27926698/regenerative-medicine
#10
Herb Brody
No abstract text is available yet for this article.
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27925870/hydrogen-sulfide-enhances-pancreatic-%C3%AE-cell-differentiation-from-human-tooth-under-normal-and-glucotoxic-conditions
#11
Ioan Valentin Matei, Hisataka Ii, Ken Yaegaki
AIM: Glucotoxicity obstructs pancreatic differentiation from adult stem cells. The aim was to develop a novel protocol for differentiation of dental pulp stem cells (DPSCs) into pancreatic β cells and determine the effect of H2S on glucotoxicity. MATERIALS & METHODS: DPSCs were differentiated with media containing 5.5 or 25.0 mM glucose, exposed to 1 ng/ml H2S. Glucotoxicity, expression of β-cell markers, INS, PDX1 and GLUT2, and PI3K/AKT pathway were assessed...
December 7, 2016: Regenerative Medicine
https://www.readbyqxmd.com/read/27925305/extracellular-matrix-in-epitheliochorial-endotheliochorial-and-haemochorial-placentation-and-its-potential-application-for-regenerative-medicine
#12
REVIEW
Ara da Anunciação, A M Mess, D Orechio, B A Aguiar, P O Favaron, M A Miglino
A placenta is defined as structural approximation of maternal and foetal tissues to perform physiological exchange. Associated processes of differentiation and the establishment of its cells take place within the extracellular matrix (ECM) that provides a rich environment of collagens, fibronectins, cytokines and other components. Placental ECM is promising for tissue regeneration purposes, because it has immune tolerance capacities that may cause only minimal rejections of transplants with immunological differences between donor and recipient...
December 7, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27924726/neurodegenerative-disease-a-perspective-on-cell-based-therapy-in-the-new-era-of-cell-free-nano-therapy
#13
Su M Metcalfe, Sean Bickerton, Tarek Fahmy
Neurodegenerative diseases (NDD) result in irreversible loss of neurons. Dementia develops when disease-induced neuronal loss becomes sufficient to impair both memory and cognitive functioning and, globally, dementia is increasing to epidemic proportions as populations age. In the current era of regenerative medicine intense activity is asking, can loss of endogenous neurons be compensated by replacement with exogenously derived cells that have either direct, or indirect, neurogenic capacity? But, more recently, excitement is growing around an emerging alternative to the cell-based approach - here nanotechnology for targeted delivery of growth factor aims to support and expand resident central nervous system (CNS) stem cells for endogenous repair...
December 6, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27924424/rgta-%C3%A2-or-regenerating-agents-mimic-heparan-sulfate-in-regenerative-medicine-from-concept-to-curing-patients
#14
REVIEW
Denis Barritault, Marie Gilbert-Sirieix, Kim Lee Rice, Fernando Siñeriz, Dulce Papy-Garcia, Christophe Baudouin, Pascal Desgranges, Gilbert Zakine, Jean-Louis Saffar, Johan van Neck
The importance of extracellular matrix (ECM) integrity in maintaining normal tissue function is highlighted by numerous pathologies and situations of acute and chronic injury associated with dysregulation or destruction of ECM components. Heparan sulfate (HS) is a key component of the ECM, where it fulfils important functions associated with tissue homeostasis. Its degradation following tissue injury disrupts this delicate equilibrium and may impair the wound healing process. ReGeneraTing Agents (RGTA(®)s) are polysaccharides specifically designed to replace degraded HS in injured tissues...
December 7, 2016: Glycoconjugate Journal
https://www.readbyqxmd.com/read/27924340/exosome-like-silica-nanoparticles-a-novel-ultrasound-contrast-agent-for-stem-cell-imaging
#15
Fang Chen, Ming Ma, Junxin Wang, Fang Wang, Shi-Xiong Chern, Eric Ruike Zhao, Anamik Jhunjhunwala, Sean Darmadi, Hangrong Chen, Jesse V Jokerst
Ultrasound is critical in many areas of medicine including obstetrics, oncology, and cardiology with emerging applications in regenerative medicine. However, one critical limitation of ultrasound is the low contrast of target tissue over background. Here, we describe a novel cup-shaped silica nanoparticle that is reminiscent of exosomes and that has significant ultrasound impedance mismatch for labelling stem cells for regenerative medicine imaging. These exosome-like silica nanoparticles (ELS) were created through emulsion templating and the silica precursors bis(triethoxysilyl)ethane (BTSE) and bis(3-trimethoxysilyl-propyl)amine (TSPA)...
December 7, 2016: Nanoscale
https://www.readbyqxmd.com/read/27923324/uncovering-the-in-vivo-source-of-adult-neural-crest-stem-cells
#16
Jorge B Aquino
Some late embryonic and adult postmigratory neural crest-derived cells (NCDCs) from diverse tissues were shown to grow as multipotent neurospheres. Neural crest stem cells (NCSCs) contained in these spheres, were found to give rise not only to neuroectodermal derivatives but also to some of the progeny of the other embryonic germ layers. In this review, evidences regarding the in vivo properties of NCDCs contributing to NCSCs are discussed. Even though in many cases the final prove for the phenotype identity of in vivo cells generating NCSCs is lacking, some evidences suggest that such postmigratory NCDCs would differ from neural crest cells (NCCs)...
December 6, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27921031/amniotic-epithelial-cells-a-new-tool-to-combat-aging-and-age-related-diseases
#17
Clara Di Germanio, Michel Bernier, Rafael de Cabo, Barbara Barboni
The number of elderly people is growing at an unprecedented rate and this increase of the aging population is expected to have a direct impact on the incidence of age-related diseases and healthcare-associated costs. Thus, it is imperative that new tools are developed to fight and slow age-related diseases. Regenerative medicine is a promising strategy for the maintenance of health and function late in life; however, stem cell-based therapies face several challenges including rejection and tumor transformation...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27919783/the-potential-of-induced-pluripotent-stem-cells-as-a-tool-to-study-skeletal-dysplasias-and-cartilage-related-pathologic-conditions
#18
REVIEW
Huan Liu, Lei Yang, Fang Fang Yu, Sen Wang, Cuiyan Wu, Chengjuan Qu, Xiong Guo, Mikko J Lammi
The development of induced pluripotent stem cells (iPSCs) technology has opened up new horizons for development of new research tools especially for skeletal dysplasias, which often lack human disease models. Regenerative medicine and tissue engineering could be the next areas to benefit from refinement of iPSC methods to repair focal cartilage defects, while applications for osteoarthritis (OA) and drug screening have evolved rather slowly. Although the advances in iPSC research of skeletal dysplasias and repair of focal cartilage lesions are not directly relevant to OA, they can be considered to pave the way to future prospects and solutions to OA research, too...
December 2, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/27918106/cannabidiol-activates-neuronal-precursor-genes-in-human-gingival-mesenchymal-stromal-cells
#19
Thangavelu Soundara Rajan, Sabrina Giacoppo, Domenico Scionti, Francesca Diomede, Gianpaolo Grassi, Federica Pollastro, Adriano Piattelli, Placido Bramanti, Emanuela Mazzon, Oriana Trubiani
In the last years, mesenchymal stromal cells (MSCs) from oral tissues have received considerable interest in regenerative medicine since they can be obtained with minimal invasive procedure and exhibit immunomodulatory properties. This study was aimed to investigate whether in vitro pre-treatment of MSCs obtained from human gingiva (hGMSCs) with Cannabidiol (CBD), a cannabinoid component produced by the plant Cannabis sativa, may promote human gingiva derived MSCs to differentiate towards neuronal precursor cells...
December 5, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27918060/effect-of-small-molecules-on-cell-reprogramming
#20
REVIEW
M Baranek, A Belter, M Z Naskręt-Barciszewska, M Stobiecki, W T Markiewicz, J Barciszewski
The essential idea of regenerative medicine is to fix or replace tissues or organs with alive and patient-specific implants. Pluripotent stem cells are able to indefinitely self-renew and differentiate into all cell types of the body which makes them a potent substantial player in regenerative medicine. The easily accessible source of induced pluripotent stem cells may allow obtaining and cultivating tissues in vitro. Reprogramming refers to regression of mature cells to its initial pluripotent state. One of the approaches affecting pluripotency is the usage of low molecular mass compounds that can modulate enzymes and receptors leading to the formation of pluripotent stem cells (iPSCs)...
December 5, 2016: Molecular BioSystems
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