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https://www.readbyqxmd.com/read/28929517/neural-differentiation-of-bone-marrow-mesenchymal-stem-cells-with-human-brain-derived-neurotrophic-factor-gene-modified-in-functionalized-self-assembling-peptide-hydrogel-in-vitro
#1
Hongbin Luo, Changsheng Xu, Zhiwei Liu, Lin Yang, Yunda Hong, Guisheng Liu, Huifen Zhong, Xinyi Cai, Xuping Lin, Xiaokun Chen, Changsheng Wang, Nanwen Zhang, Weihong Xu
OBJECTIVE: To investigate the biocompatibility and differentiation of human brain-derived neurotrophic factor (hBDNF) gene-modified bone marrow mesenchymal stem cells (hBDNF-rMSCs) in a functionalized self-assembling peptide hydrogel. METHODS: hBDNF were engineered in rMSCs using adenovirus vector and the enhanced green fluorescence protein (eGFP) was used as a reporter gene. MSC-specific surface markers (CD90,CD29 and CD45)were used for identifying rMSCs. Fluorescence microscope was used to detect the transfection of rMSCs...
September 19, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28928909/transplanting-embryonic-stem-cells-onto-damaged-human-corneal-endothelium
#2
Charles Hanson, Arsaell Arnarsson, Thorir Hardarson, Ann Lindgård, Mandana Daneshvarnaeini, Catarina Ellerström, Anita Bruun, Ulf Stenevi
AIM: To investigate whether human embryonic stem cells (hESCs) could be made to attach, grow and differentiate on a human Descemet's membrane (DM). METHODS: Spontaneously differentiated hESCs were transferred onto a human corneal button with the endothelial layer removed using ocular sticks. The cells were cultured on a DM for up to 15 d. The genetically engineered hESC line expressed green fluorescent protein, which facilitated identification during the culture experiments, tissue preparation, and analysis...
August 26, 2017: World Journal of Stem Cells
https://www.readbyqxmd.com/read/28928907/adipose-derived-stromal-cell-in-regenerative-medicine-a-review
#3
REVIEW
Reza Tabatabaei Qomi, Mohsen Sheykhhasan
The application of appropriate cell origin for utilizing in regenerative medicine is the major issue. Various kinds of stem cells have been used for the tissue engineering and regenerative medicine. Such as, several stromal cells have been employed as treat option for regenerative medicine. For example, human bone marrow-derived stromal cells and adipose-derived stromal cells (ADSCs) are used in cell-based therapy. Data relating to the stem cell therapy and processes associated with ADSC has developed remarkably in the past 10 years...
August 26, 2017: World Journal of Stem Cells
https://www.readbyqxmd.com/read/28927933/azopolymer-photopatterning-for-directional-control-of-angiogenesis
#4
Chiara Fedele, Maria De Gregorio, Paolo A Netti, Silvia Cavalli, Chiara Attanasio
Understanding cellular behavior in response to microenvironmental stimuli is central to tissue engineering. An increasing number of reports emphasize the high sensitivity of cells to the physical characteristics of the surrounding milieu and in particular, topographical cues. In this work, we investigated the influence of dynamic topographic signal presentation on sprout formation and the possibility to obtain a space-time control over sprouting directionality without growth factors, in order to investigate the contribution of just topography in the angiogenic process...
September 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28927930/biodegradable-and-adjustable-sol-gel-glass-based-hybrid-scaffolds-from-multi-armed-oligomeric-building-blocks
#5
Christian Kascholke, Stephan Hendrikx, Tobias Flath, Dzmitry Kuzmenka, Hans-Martin Dörfler, Dirk Schumann, Mathias Gressenbuch, F Peter Schulze, Michaela Schulz-Siegmund, Michael C Hacker
Biodegradability is a crucial characteristic to improve the clinical potential of sol-gel-derived glass materials. To this end, a set of degradable organic/inorganic class II hybrids from a tetraethoxysilane(TEOS)-derived silica sol and oligovalent cross-linker oligomers containing oligo(D,L-lactide) domains was developed and characterized. A series of 18 oligomers (Mn: 1100-3200 Da) with different degrees of ethoxylation and varying length of oligoester units was established and chemical composition was determined...
September 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28925359/generation-of-an-oct4-reporter-human-induced-pluripotent-stem-cell-line-using-crispr-spcas9
#6
Diego Balboa, Jere Weltner, Yuval Novik, Solja Eurola, Kirmo Wartiovaara, Timo Otonkoski
OCT4 is a crucial transcription factor in the pluripotent stem cell gene regulatory network and an essential factor for pluripotent reprogramming. We engineered the previously reported HEL24.3 hiPSC to generate an OCT4 reporter cell line by knocking-in a T2A nuclear EmGFP reporter cassette before the OCT4 gene STOP codon sequence. To enhance targeted insertion, homologous recombination was stimulated using targeted cutting at the OCT4 STOP codon with CRISPR/SpCas9. This HEL24.3-OCT4-nEmGFP cell line faithfully reports endogenous OCT4 expression, serving as a useful tool to examine temporal changes in OCT4 expression in live cells during hiPSC culture, differentiation and somatic cell reprogramming...
August 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28923105/genetic-engineering-of-human-nk-cells-to-express-cxcr2-improves-migration-to-renal-cell-carcinoma
#7
Veronika Kremer, Maarten Ligtenberg, Rosa Zendehdel, Christina Seitz, Annet Duivenvoorden, Erik Wennerberg, Eugenia Colón, Ann-Helén Scherman-Plogell, Andreas Lundqvist
BACKGROUND: Adoptive natural killer (NK) cell transfer is being increasingly used as cancer treatment. However, clinical responses have so far been limited to patients with hematological malignancies. A potential limiting factor in patients with solid tumors is defective homing of the infused NK cells to the tumor site. Chemokines regulate the migration of leukocytes expressing corresponding chemokine receptors. Various solid tumors, including renal cell carcinoma (RCC), readily secrete ligands for the chemokine receptor CXCR2...
September 19, 2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28918039/crispr-cas9-mediated-knockin-application-in-cell-therapy-a-non-viral-procedure-for-bystander-treatment-of-glioma-in-mice
#8
Oscar Meca-Cortés, Marta Guerra-Rebollo, Cristina Garrido, Salvador Borrós, Nuria Rubio, Jeronimo Blanco
The use of non-viral procedures, together with CRISPR/Cas9 genome-editing technology, allows the insertion of single-copy therapeutic genes at pre-determined genomic sites, overcoming safety limitations resulting from random gene insertions of viral vectors with potential for genome damage. In this study, we demonstrate that combination of non-viral gene delivery and CRISPR/Cas9-mediated knockin via homology-directed repair can replace the use of viral vectors for the generation of genetically modified therapeutic cells...
September 15, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28914404/development-and-characterization-of-hybrid-tubular-structure-of-plcl-porous-scaffold-with-hmscs-ecs-cell-sheet
#9
Azizah Intan Pangesty, Takaaki Arahira, Mitsugu Todo
Tissue engineering offers an alternate approach to providing vascular graft with potential to grow similar with native tissue by seeding autologous cells into biodegradable scaffold. In this study, we developed a combining technique by layering a sheet of cells onto a porous tubular scaffold. The cell sheet prepared from co-culturing human mesenchymal stem cells (hMSCs) and endothelial cells (ECs) were able to infiltrate through porous structure of the tubular poly (lactide-co-caprolactone) (PLCL) scaffold and further proliferated on luminal wall within a week of culture...
September 15, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28912540/sox9-regulates-cancer-stem-like-properties-and-metastatic-potential-of-single-walled-carbon-nanotube-exposed-cells
#10
Maria A Voronkova, Sudjit Luanpitpong, Liying Wang Rojanasakul, Vincent Castranova, Cerasela Zoica Dinu, Heimo Riedel, Yon Rojanasakul
Engineered nanomaterials hold great promise for the future development of innovative products but their adverse health effects are a major concern. Recent studies have indicated that certain nanomaterials, including carbon nanotubes (CNTs), may be carcinogenic. However, the underlying mechanisms behind their potential malignant properties remain unclear. In this study, we linked SOX9, a stem cell associated transcription factor, to the neoplastic-like properties of human lung epithelial cells chronically exposed to a low-dose of single-walled carbon nanotubes (SWCNTs)...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28904343/engineered-factor-xa-variants-retain-procoagulant-activity-independent-of-direct-factor-xa-inhibitors
#11
Daniël Verhoef, Koen M Visscher, C Ruben Vosmeer, Ka Lei Cheung, Pieter H Reitsma, Daan P Geerke, Mettine H A Bos
The absence of an adequate reversal strategy to prevent and stop potential life-threatening bleeding complications is a major drawback to the clinical use of the direct oral inhibitors of blood coagulation factor Xa. Here we show that specific modifications of the substrate-binding aromatic S4 subpocket within the factor Xa active site disrupt high-affinity engagement of the direct factor Xa inhibitors. These modifications either entail amino-acid substitution of S4 subsite residues Tyr99 and/or Phe174 (chymotrypsinogen numbering), or extension of the 99-loop that borders the S4 subsite...
September 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/28902474/electrospun-nanofibrous-meshes-cultured-with-wharton-s-jelly-stem-cell-an-alternative-for-cartilage-regeneration-without-the-need-of-growth-factors
#12
Marta Alves da Silva, Albino Martins, Ana R Costa-Pinto, Nélson Monteiro, Susana Faria, Rui L Reis, Nuno M Neves
Many efforts are being directed worldwide to the treatment of OA-focal lesions. The majority of those efforts comprise either the refinement of surgical techniques or combinations of biomaterials with various autologous cells. Herein, we tested electrospun polycaprolactone (PCL) nanofibrous meshes for cartilage tissue engineering. For that, articular chondrocytes (hACs) isolated from human osteoarthritic joints and Wharton's Jelly Stem Cells (hWJSCs) were cultured on electrospun nanofiber meshes, without adding external growth factors...
September 13, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28901188/engineered-microvasculature-in-pdms-networks-using-endothelial-cells-derived-from-human-induced-pluripotent-stem-cells
#13
Amogh Sivarapatna, Mahboobe Ghaedi, Yang Xiao, Edward Han, Binod Aryal, Jing Zhou, Carlos Fernandez-Hernando, Yibing Qyang, Karen K Hirschi, Laura E Niklason
In this study, we used a polydimethylsiloxane (PDMS)-based platform for the generation of intact, perfusion-competent microvascular networks in vitro. COMSOL Multiphysics, a finite-element analysis and simulation software package, was used to obtain simulated velocity, pressure, and shear stress profiles. Transgene-free human induced pluripotent stem cells (hiPSCs) were differentiated into partially arterialized endothelial cells (hiPSC-ECs) in 5 d under completely chemically defined conditions, using the small molecule glycogen synthase kinase 3β inhibitor CHIR99021 and were thoroughly characterized for functionality and arterial-like marker expression...
August 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28898253/engineering-human-cell-spheroids-to-model-embryonic-tissue-fusion-in-vitro
#14
David G Belair, Cynthia J Wolf, Carmen Wood, Hongzu Ren, Rachel Grindstaff, William Padgett, Adam Swank, Denise MacMillan, Anna Fisher, Witold Winnik, Barbara D Abbott
Epithelial-mesenchymal interactions drive embryonic fusion events during development, and perturbations of these interactions can result in birth defects. Cleft palate and neural tube defects can result from genetic defects or environmental exposures during development, yet very little is known about the effect of chemical exposures on fusion events during human development because of a lack of relevant and robust human in vitro assays of developmental fusion behavior. Given the etiology and prevalence of cleft palate and the relatively simple architecture and composition of the embryonic palate, we sought to develop a three-dimensional culture system that mimics the embryonic palate and could be used to study fusion behavior in vitro using human cells...
2017: PloS One
https://www.readbyqxmd.com/read/28895854/gene-therapy-approaches-to-human-immunodeficiency-virus-and-other-infectious-diseases
#15
REVIEW
Geoffrey L Rogers, Paula M Cannon
Advances in gene therapy technologies, particularly in gene editing, are suggesting new avenues for the treatment of human immunodeficiency virus and other infectious diseases. This article outlines recent developments in antiviral gene therapies, including those based on the disruption of entry receptors or that target viral genomes using targeted nucleases, such as the CRISPR/Cas9 system. In addition, new ways to express circulating antiviral factors, such as antibodies, and approaches to harness and engineer the immune system to provide an antiviral effect that is not naturally achieved are described...
October 2017: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/28893713/next-generation-plant-metabolic-engineering-inspired-by-an-ancient-chinese-irrigation-system
#16
REVIEW
Rao Fu, Cathie Martin, Yang Zhang
Specialized secondary metabolites serve not only to protect plants against abiotic and biotic challenges, but have also been used extensively by humans to combat diseases. Due to the importance of medicinal plants for health, we need to find new and sustainable ways to produce their specialized metabolites. In addition to direct extraction, recent progress in metabolic engineering of plants offers alternative supply options. We argue that metabolic engineering for the production of some secondary metabolites in plants may have distinct advantages over microbial production platforms and we propose new approaches to plant metabolic engineering, inspired by an ancient Chinese irrigation system...
September 8, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28892048/cdkn2b-deletion-is-essential-for-pancreatic-cancer-development-instead-of-unmeaningful-co-deletion-due-to-juxtaposition-to-cdkn2a
#17
Q Tu, J Hao, X Zhou, L Yan, H Dai, B Sun, D Yang, S An, L Lv, B Jiao, C Chen, R Lai, P Shi, X Zhao
Pancreatic cancer is among the deadliest malignancies; however, the genetic events that lead to pancreatic carcinogenesis in adults remain unclear. In vivo models in which these genetic alterations occur in adult animals may more accurately reflect the features of human cancer. In this study, we demonstrate that inactivation of Cdkn2b (p15ink4b) is necessary for induction of pancreatic cancer by oncogenic KRAS(G12D) expression and inactivation of Tp53 and Cdkn2a in adult mouse pancreatic ductal cells (P60 or older)...
September 11, 2017: Oncogene
https://www.readbyqxmd.com/read/28890351/in-situ-delivery-and-production-system-of-trastuzumab-scfv-with-bifidobacterium
#18
Takeshi Kikuchi, Hitomi Shimizu, Yasuto Akiyama, Shun'ichiro Taniguchi
A monoclonal antibody targeting human epidermal growth factor receptor-2 (HER2), trastuzumab has become a standard treatment for HER2-positive breast cancer. Recent advancements in antibody engineering have enabled the efficient generation of the trastuzumab single-chain variable fragment (scFv). In this study, we genetically engineered Bifidobacterium, a bacterial strain shown to accumulate safely and selectively in hypoxic tumor sites by intravenous (iv) injection, to express and secrete the trastuzumab scFv...
September 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28890259/silk-fibroin-chondroitin-sulfate-scaffold-with-immuno-inhibition-property-for-articular-cartilage-repair
#19
Feifei Zhou, Xianzhu Zhang, Dandan Cai, Jun Li, Qin Mu, Wei Zhang, Shouan Zhu, Yangzi Jiang, Weiliang Shen, Shufang Zhang, Hong Wei Ouyang
The demand of favorable scaffolds has increased for the emerging cartilage tissue engineering. Chondroitin sulfate (CS) and silk fibroin have been investigated and reported with safety and excellent biocompatibility as tissue engineering scaffolds. However, the rapid degradation rate of pure CS scaffolds presents a challenge to effectively recreate neo-tissue similar to natural articular cartilage. Meanwhile the silk fibroin is well used as a structural constituent material because its remarkable mechanical properties, long-lasting in vivo stability and hypoimmunity...
September 7, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28888566/tendon-tissue-engineering-mechanism-and-effects-of-human-tenocyte-coculture-with-adipose-derived-stem-cells
#20
Chao Long, Zhen Wang, Anais Legrand, Arhana Chattopadhyay, James Chang, Paige M Fox
PURPOSE: Adipose-derived stem cells (ASCs) are a potential candidate for cell-based therapy targeting tendon injury; however, their therapeutic benefit relies on their ability to interact with native tenocytes. This study examines the mechanism and effects of coculturing human tenocytes and ASCs. METHODS: Tenocytes (T) were directly cocultured with either ASCs (A) or fibroblasts (F) (negative control) in the following ratios: 50% T/50% A or F; 25% T/75% A or F; and 75% T/25% A or F...
September 6, 2017: Journal of Hand Surgery
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