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Transcription factor tissue engineering

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https://www.readbyqxmd.com/read/27923328/modeling-stroma-induced-drug-resistance-in-a-tissue-engineered-tumor-model-of-ewing-sarcoma
#1
Marco Santoro, Brian A Menegaz, Salah-Eddine Lamhamedi-Cherradi, Eric R Molina, Danielle Wu, Waldemar Priebe, Joseph A Ludwig, Antonios G Mikos
Three-dimensional (3D) tumor models are gaining traction in the research community given their capacity to mimic aspects of the tumor microenvironment absent in monolayer systems. In particular, the ability to spatiotemporally control cell placement within ex vivo 3D systems has enabled the study of tumor-stroma interactions. Furthermore, by regulating biomechanical stimuli, one can reveal how biophysical cues affect stromal cell phenotype and how their phenotype impacts tumor drug sensitivity. Both tumor architecture and shear force have profound effects on Ewing sarcoma (ES) cell behavior and are known to elicit ligand-mediated activation of the insulin-like growth factor-1 receptor (IGF-1R), thereby mediating resistance of ES cells to IGF-1R inhibitors...
December 6, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27918898/roles-of-l-type-calcium-channels-cav1-2-and-the-distal-c-terminus-dct-in-differentiation-and-mineralization-of-rat-dental-apical-papilla-stem-cells-rscaps
#2
Qianqian Gao, Jianping Ge, Yanqin Ju, Changsheng Li, Jian Gao, Meisheng Wu, Shouliang Zhao
OBJECTIVE: Voltage-gated inward Ca(2+) currents (ICa) are triggered by cell depolarization and commonly produce transient increases in the cytoplasmic free Ca(2+) concentration. The CaV1.2 distal C-terminus is susceptible to proteolytic cleavage, which yields a truncated CaV1.2 subunit and a cleaved C-terminal fragment (CCt or DCT). Stem cells from the apical papilla (SCAPs) has a capacity for differentiation into the odontoblastic-like cells in vitro and dentin forming in vivo, which makes SCAPs advantages in tissue engineering and regenerative endodontic...
November 4, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27916924/divergent-expression-patterns-in-two-vernicia-species-revealed-the-potential-role-of-the-hub-gene-vmap2-erf036-in-resistance-to-fusarium-oxysporum-in-vernicia-montana
#3
Qiyan Zhang, Ming Gao, Liwen Wu, Yangdong Wang, Yicun Chen
Tung oil tree (Vernicia fordii) is a promising industrial oil crop; however, this tree is highly susceptible to Fusarium wilt disease. Conversely, Vernicia montana is resistant to the pathogen. The APETALA2/ethylene-responsive element binding factor (AP2/ERF) transcription factor superfamily has been reported to play a significant role in resistance to Fusarium oxysporum. In this study, comprehensive analysis identified 75 and 81 putative Vf/VmAP2/ERF transcription factor-encoding genes in V. fordii and V. montana, respectively, which were divided into AP2, ERF, related to ABI3 and VP1 (RAV) and Soloist families...
December 1, 2016: Genes
https://www.readbyqxmd.com/read/27904482/engineering-personalized-neural-tissue-using-functionalized-transcription-factors
#4
Stephanie M Willerth
No abstract text is available yet for this article.
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27855193/transcriptome-wide-identification-and-expression-analysis-of-the-nac-gene-family-in-tea-plant-camellia-sinensis-l-o-kuntze
#5
Yong-Xin Wang, Zhi-Wei Liu, Zhi-Jun Wu, Hui Li, Jing Zhuang
In plants, the NAC (NAM-ATAF1/2-CUC) family of proteins constitutes several transcription factors and plays vital roles in diverse biological processes, such as growth, development, and adaption to adverse factors. Tea, as a non-alcoholic drink, is known for its bioactive ingredients and health efficacy. Currently, knowledge about NAC gene family in tea plant remains very limited. In this study, a total of 45 CsNAC genes encoding NAC proteins including three membrane-bound members were identified in tea plant through transcriptome analysis...
2016: PloS One
https://www.readbyqxmd.com/read/27820865/egr1-regulates-transcription-downstream-of-mechanical-signals-during-tendon-formation-and-healing
#6
Ludovic Gaut, Nicolas Robert, Antony Delalande, Marie-Ange Bonnin, Chantal Pichon, Delphine Duprez
BACKGROUND: Tendon is a mechanical tissue that transmits forces generated by muscle to bone in order to allow body motion. The molecular pathways that sense mechanical forces during tendon formation, homeostasis and repair are not known. EGR1 is a mechanosensitive transcription factor involved in tendon formation, homeostasis and repair. We hypothesized that EGR1 senses mechanical signals to promote tendon gene expression. METHODOLOGY/PRINCIPAL FINDINGS: Using in vitro and in vivo models, we show that the expression of Egr1 and tendon genes is downregulated in 3D-engineered tendons made of mesenchymal stem cells when tension is released as well as in tendon homeostasis and healing when mechanical signals are reduced...
2016: PloS One
https://www.readbyqxmd.com/read/27811389/hydrogel-fibers-encapsulating-human-stem-cells-in-an-injectable-calcium-phosphate-scaffold-for-bone-tissue-engineering
#7
Lin Wang, Ping Wang, Michael D Weir, Mark A Reynolds, Liang Zhao, Hockin H K Xu
Human induced pluripotent stem cells (hiPSCs), human embryonic stem cells (hESCs) and human umbilical cord mesenchymal stem cells (hUCMSCs) are exciting cell sources for use in regenerative medicine. There have been no reports on long hydrogel fibers encapsulating stem cells inside an injectable calcium phosphate cement (CPC) scaffold for bone tissue engineering. The objectives of this study were: (1) to develop a novel injectable CPC construct containing hydrogel fibers encapsulating cells for bone engineering, and (2) to investigate and compare cell viability, proliferation and osteogenic differentiation of hiPSC-MSCs, hESC-MSCs and hUCMSCs in injectable CPC...
November 4, 2016: Biomedical Materials
https://www.readbyqxmd.com/read/27798116/most-brain-disease-associated-and-eqtl-haplotypes-are-not-located-within-transcription-factor-dnase-seq-footprints-in-brain
#8
Adam E Handel, Giuseppe Gallone, M Zameel Cader, Chris P Ponting
Dense genotyping approaches have revealed much about the genetic architecture both of gene expression and disease susceptibility. However, assigning causality to genetic variants associated with a transcriptomic or phenotypic trait presents a far greater challenge. The development of epigenomic resources by ENCODE, the Epigenomic Roadmap and others has led to strategies that seek to infer the likely functional variants underlying these genome-wide association signals. It is known, for example, that such variants tend to be located within areas of open chromatin, as detected by techniques such as DNase-seq and FAIRE-seq...
October 26, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/27793670/ciliary-smoothened-mediated-noncanonical-hedgehog-signaling-promotes-tubulin-acetylation
#9
Hankyu Lee, Hyuk Wan Ko
Hedgehog (Hh) signaling plays key roles in animal development and tissue homeostasis. Binding of the secreted ligand to its Ptch1 receptor triggers Hh signaling through distinct canonical or noncanonical signaling pathways. Canonical Hh signaling leads to the activation of Gli transcription factors to induce Hh target-gene expression. In contrast, noncanonical Hh signaling regulates cytoskeleton rearrangement and apoptosis. Recently, it has been shown that primary cilia are important for canonical Hh signaling, but the ciliary role for signaling through the noncanonical pathway remains unresolved...
October 25, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27785631/odontogenic-differentiation-and-biomineralization-potential-of-dental-pulp-stem-cells-inside-mg-based-bioceramic-scaffolds-under-low-level-laser-treatment
#10
Anna Theocharidou, Athina Bakopoulou, Eleana Kontonasaki, Eleni Papachristou, Christina Hadjichristou, Maria Bousnaki, George Theodorou, Lambrini Papadopoulou, Nikolaos Kantiranis, Konstantinos Paraskevopoulos, Petros Koidis
This study aimed to investigate the potential of low-level laser irradiation (LLLI) to promote odontogenic differentiation and biomineralization by dental pulp stem cells (DPSCs) seeded inside bioceramic scaffolds. Mg-based, Zn-doped bioceramic scaffolds, synthesized by the sol-gel technique, were spotted with DPSCs and exposed to LLLI at 660 nm with maximum output power of 140 mw at fluencies (a) 2 and 4 J/cm(2) to evaluate cell viability/proliferation by the MTT assay and (b) 4 J/cm(2) to evaluate cell differentiation, using real-time PCR (expression of odontogenic markers) and a p-nitrophenylphosphate (pNPP)-based assay for alkaline phosphatase (ALP) activity measurement...
October 26, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27727016/mscs-can-be-differentially-isolated-from-maternal-middle-and-fetal-segments-of-the-human-umbilical-cord
#11
Jezamine Lim, Zainul Rashid Mohamad Razi, Jiaxian Law, Azmawati Mohammed Nawi, Ruszymah Binti Haji Idrus, Min Hwei Ng
BACKGROUND AIMS: Human Wharton's jelly-derived mesenchymal stromal cells (hWJMSCs) are possibly the most suitable allogeneic cell source for stromal cell therapy and tissue engineering applications because of their hypo-immunogenic and non-tumorigenic properties, easy availability and minimal ethical concerns. Furthermore, hWJMSCs possess unique properties of both adult mesenchymal stromal cells and embryonic stromal cells. The human umbilical cord (UC) is approximately 50-60 cm long and the existing studies in the literature have not provided information on which segment of the UC was studied...
October 7, 2016: Cytotherapy
https://www.readbyqxmd.com/read/27723266/effects-of-tgf-%C3%AE-1-on-plasminogen-activation-in-human-dental-pulp-cells-role-of-alk5-smad2-tak1-and-mek-erk-signaling
#12
Mei-Chi Chang, Hsiao-Hua Chang, Po-Shuan Lin, Yu-An Huang, Chiu-Po Chan, Yi-Ling Tsai, Shen-Yang Lee, Po-Yuan Jeng, Han-Yueh Kuo, Sin-Yuet Yeung, Jiiang-Huei Jeng
Transforming growth factor-β1 (TGF-β1) plays an important role in the pulpal repair and dentinogenesis. Plasminogen activation (PA) system regulates extracellular matrix turnover. In this study, we investigated the effects of TGF-β1 on PA system of dental pulp cells and its signaling pathways. Dental pulp cells were treated with different concentrations of TGF-β1. MTT assay, reverse transcription-polymerase chain reaction (RT-PCR), western blotting and enzyme-linked immunosorbant assay (ELISA) were used to detect the effect of TGF-β1 on cell viability, mRNA and protein expression of urokinase-type plasminogen activator (uPA), uPA receptor (uPAR), plasminogen activator inhibitor-1 (PAI-1) as well as their secretion...
October 9, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27723133/aunp-collagen-matrix-with-localized-stiffness-for-cardiac-tissue-engineering-enhancing-the-assembly-of-intercalated-discs-by-%C3%AE-1-integrin-mediated-signaling
#13
Yi Li, Xiaoli Shi, Lei Tian, Hongyu Sun, Yujing Wu, Xia Li, Jianjun Li, Yujie Wei, Xinxiao Han, Jiao Zhang, Xiaowei Jia, Rui Bai, Limin Jing, Peng Ding, Huiliang Liu, Dong Han
A schematic for the mechanism of accelerating the assembly of intercalated discs (IDs) in cardiac myocytes regulated by gold nanoparticles (AuNPs) is presented. AuNPs with local nanoscale stiffness in the substrate activate β1-integrin signaling, which mediates the activation of integrin-linked kinase (ILK) and its downstream signal kinase by stimulating expression of the transcription factors GATA4 and MEF-2c.
October 10, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27686755/electromechanical-conditioning-of-adult-progenitor-cells-improves-recovery-of-cardiac-function-after-myocardial-infarction
#14
Aida Llucià-Valldeperas, Carolina Soler-Botija, Carolina Gálvez-Montón, Santiago Roura, Cristina Prat-Vidal, Isaac Perea-Gil, Benjamin Sanchez, Ramon Bragos, Gordana Vunjak-Novakovic, Antoni Bayes-Genis
: : Cardiac cells are subjected to mechanical and electrical forces, which regulate gene expression and cellular function. Therefore, in vitro electromechanical stimuli could benefit further integration of therapeutic cells into the myocardium. Our goals were (a) to study the viability of a tissue-engineered construct with cardiac adipose tissue-derived progenitor cells (cardiac ATDPCs) and (b) to examine the effect of electromechanically stimulated cardiac ATDPCs within a myocardial infarction (MI) model in mice for the first time...
September 29, 2016: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/27662880/targeted-gene-activation-using-rna-guided-nucleases
#15
Alexander Brown, Wendy S Woods, Pablo Perez-Pinera
The discovery of the prokaryotic CRISPR-Cas (clustered regularly interspaced short palindromic repeats-CRISPR-associated) system and its adaptation for targeted manipulation of DNA in diverse species has revolutionized the field of genome engineering. In particular, the fusion of catalytically inactive Cas9 to any number of transcriptional activator domains has resulted in an array of easily customizable synthetic transcription factors that are capable of achieving robust, specific, and tunable activation of target gene expression within a wide variety of tissues and cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27650846/reconstructed-cell-fate-regulatory-programs-in-stem-cells-reveal-hierarchies-and-key-factors-of-neurogenesis
#16
Marco-Antonio Mendoza-Parra, Valeriya Malysheva, Mohamed Ashick Mohamed Saleem, Michele Lieb, Aurelie Godel, Hinrich Gronemeyer
Cell lineages, which shape the body architecture and specify cell functions, derive from the integration of a plethora of cell intrinsic and extrinsic signals. These signals trigger a multiplicity of decisions at several levels to modulate the activity of dynamic gene regulatory networks (GRNs), which ensure both general and cell-specific functions within a given lineage, thereby establishing cell fates. Significant knowledge about these events and the involved key drivers comes from homogeneous cell differentiation models...
November 2016: Genome Research
https://www.readbyqxmd.com/read/27633652/comparative-transcriptome-analysis-in-different-tissues-of-a-medicinal-herb-picrorhiza-kurroa-pinpoints-transcription-factors-regulating-picrosides-biosynthesis
#17
Ira Vashisht, Tarun Pal, Hemant Sood, Rajinder S Chauhan
Transcriptional regulation of picrosides biosynthesis, the iridoid glycosides of an endangered medicinal herb, Picrorhiza kurroa, is completely unknown. P. kurroa plants obtained from natural habitat accumulate higher picrosides than in-vitro cultured plants, which necessitates identification of transcription factors (TFs) regulating their differential biosynthesis. The current study investigates complete spectrum of different TF classes in P. kurroa transcriptomes and discerns their association with picrosides biosynthesis...
September 15, 2016: Molecular Biology Reports
https://www.readbyqxmd.com/read/27633082/effect-of-bmps-and-wnt3a-co-expression-on-the-osteogenetic-capacity-of-osteoblasts
#18
Wendong Ruan, Yuan Xue, Yaqi Zong, Chao Sun
In the present study, third‑generation autologous‑inactivated bone morphogenic protein 2 (BMP2), BMP4, BMP6, BMP7, BMP9 and Wnt3a lentiviral vectors were constructed and integrated into the genome of MC3T3‑E1 murine mesenchymal stem cells (MMSCs) to produce osteoinductive factor gene‑modified MMSCs. The transfection efficiency of each osteoinductive factor was then determined by detecting the expression levels of runt related transcription factor 2 (Runx2) mRNA. The cotransfection with combinations of two lentiviruses was performed, and the expression levels of bone γ‑carboxyglutamate protein and alkaline phosphatase in the MC3T3‑E1 cell culture supernatant were detected...
September 12, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27631002/applications-of-chondrocyte-based-cartilage-engineering-an-overview
#19
REVIEW
Abdul-Rehman Phull, Seong-Hui Eo, Qamar Abbas, Madiha Ahmed, Song Ja Kim
Chondrocytes are the exclusive cells residing in cartilage and maintain the functionality of cartilage tissue. Series of biocomponents such as different growth factors, cytokines, and transcriptional factors regulate the mesenchymal stem cells (MSCs) differentiation to chondrocytes. The number of chondrocytes and dedifferentiation are the key limitations in subsequent clinical application of the chondrocytes. Different culture methods are being developed to overcome such issues. Using tissue engineering and cell based approaches, chondrocytes offer prominent therapeutic option specifically in orthopedics for cartilage repair and to treat ailments such as tracheal defects, facial reconstruction, and urinary incontinence...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27629763/angiogenic-potential-of-human-bone-marrow-derived-mesenchymal-stem-cells-in-chondrocyte-brick-enriched-constructs-promoted-stable-regeneration-of-craniofacial-cartilage
#20
Zhiye Li, Ruikai Ba, Zhifa Wang, Jianhua Wei, Yimin Zhao, Wei Wu
: : Craniofacial deformities caused by congenital defects or trauma remain challenges for clinicians, whereas current surgical interventions present limited therapeutic outcomes. Injection of bone marrow-derived mesenchymal stem cells (BMSCs) into the defect is highly desirable because such a procedure is microinvasive and grafts are more flexible to fill the lesions. However, preventing hypertrophic transition and morphological contraction remain significant challenges. We have developed an "all host derived" cell transplantation system composed of chondrocyte brick (CB)-enriched platelet-rich plasma (P) gel and BMSCs (B)...
September 14, 2016: Stem Cells Translational Medicine
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