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https://www.readbyqxmd.com/read/29335618/long-term-maintenance-of-human-pluripotent-stem-cells-on-crgdfk-presenting-synthetic-surfaces
#1
Jack W Lambshead, Laurence Meagher, Jacob Goodwin, Tanya Labonne, Elizabeth Ng, Andrew Elefanty, Edouard Stanley, Carmel M O'Brien, Andrew L Laslett
Synthetic human pluripotent stem cell (hPSC) culture surfaces with defined physical and chemical properties will facilitate improved research and therapeutic applications of hPSCs. In this study, synthetic surfaces for hPSC culture in E8 medium were produced for screening by modifying two polymer brush coatings [poly(acrylamide-co-acrylic acid) (PAAA) and poly(acrylamide-co-propargyl acrylamide) (PAPA)] to present single peptides. Adhesion of hPSC colonies was more consistently observed on surfaces modified with cRGDfK compared to surfaces modified with other peptide sequences tested...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330806/fluorescence-activated-cell-sorting-of-murine-mammary-cancer-stem-like-cell-subpopulations-with-hif-activity
#2
Danielle L Brooks, Tiffany N Seagroves
Fluorescence-activated cell sorting (FACS) is a common method to identify and to isolate subpopulations within a complex mixture of cells based on their light scatter and fluorescent staining profiles. FACS is widely used to enrich for normal tissue and tumor cells that have stem cell potential. Whereas FACS protocols using conventional breast cancer cell lines are relatively routine, additional technical challenges are encountered when sorting for cell populations from freshly digested solid tumors, particularly for use in downstream cancer stem cell (CSC) assays...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330730/scaffold-free-tissue-engineering-for-injured-joint-surface-restoration
#3
REVIEW
Kazunori Shimomura, Wataru Ando, Hiromichi Fujie, David A Hart, Hideki Yoshikawa, Norimasa Nakamura
Articular cartilage does not heal spontaneously due to its limited healing capacity, and thus effective treatments for cartilage injuries has remained challenging. Since the first report by Brittberg et al. in 1994, autologous chondrocyte implantation (ACI) has been introduced into the clinic. Recently, as an alternative for chondrocyte-based therapy, mesenchymal stem cell (MSC)-based therapy has received considerable research attention because of the relative ease in handling for tissue harvest, and subsequent cell expansion and differentiation...
January 5, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29328479/the-human-umbilical-cord-stem-cells-improve-the-viability-of-oa-degenerated-chondrocytes
#4
Hao Wang, Xu Yan, Yuxin Jiang, Zheng Wang, Yufei Li, Qingdong Shao
Osteoarthritis (OA) affects a large number of patients; however, human umbilical cord stem cells exhibit therapeutic potential for treating OA. The aim of the present study was to explore the interaction between human umbilical cord stem cells and degenerated chondrocytes, and the therapeutic potential of human umbilical cord stem cells on degenerated chondrocytes. Human umbilical cord‑derived mesenchymal stem cells (hUC‑MSCs) were harvested from human umbilical cords, and flow cytometry was used to analyze the surface antigen markers, in addition, chondrogenic, osteogenic and adipogenic differentiation on the cells was investigated...
January 9, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29327452/regenerative-effects-of-human-embryonic-stem-cell-derived-neural-crest-cells-for-treatment-of-peripheral-nerve-injury
#5
Iwan Jones, Liudmila N Novikova, Lev N Novikov, Monika Renardy, Andreas Ullrich, Mikael Wiberg, Leif Carlsson, Paul J Kingham
Surgical intervention is the current gold standard treatment following peripheral nerve injury. However, this approach has limitations and full recovery of both motor and sensory modalities often remains incomplete. The development of artificial nerve grafts that either complement or replace current surgical procedures is therefore of paramount importance. An essential component of artificial grafts are biodegradable conduits and transplanted cells that provide trophic support during the regenerative process...
January 12, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29324934/stem-cells-therapy-the-future-in-the-management-of-systemic-sclerosis-a-case-report
#6
Jung In Song, Silvanie Volz, Maria Eirini Liodaki, Peter Mailänder, Konstantinos Kalousis
OBJECTIVE: Systemic sclerosis (SSc) is a connective tissue disorder of unknown etiology, with heterogeneous clinical manifestations and chronic and often progressive course. The diffuse cutaneous form of SSc (dcSSc) is characterized by thickening of the skin (scleroderma) and distinctive involvement of multiple internal organs. Patients with limited cutaneous SSc (lcSSc) generally have long-standing Raynaud's phenomenon before other manifestations of SSc appear. Over the last decade the Interest of adipose-derived cell therapy in regenerative medicine has increased continuously...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29321630/engineered-mesenchymal-stem-cell-sheets-patches-prevents-postoperative-pancreatic-leakage-in-a-rat-model
#7
Seong-Ryong Kim, Hye-Jin Yi, Yu Na Lee, Ji Yoon Park, Robert M Hoffman, Teruo Okano, In Kyong Shim, Song Cheol Kim
Post-operative pancreatic fistula (POPF) following pancreatic resection is a life-threatening surgical complication. Cell sheets were prepared and harvested using temperature-responsive culture dishes and transplanted as patches to seal POPF. Two different mesenchymal stem cell (MSC) sheets were compared in terms of the preventative ability for pancreatic leakage in a rat model. Both rat adipose-derived stem cell (rADSC) and bone marrow-derived stem cell (rBMSC) sheets were transplanted. Those rADSC and rBMSC sheets are created without enzymes and thus maintained their cell-cell junctions and adhesion proteins with intact fibronectin on the basal side, as well as characteristics of MSCs...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317369/mesenchymal-stem-cell-derived-extracellular-matrix-enhances-chondrogenic-phenotype-of-and-cartilage-formation-by-encapsulated-chondrocytes-in-vitro-and-in-vivo
#8
Yuanheng Yang, Hang Lin, He Shen, Bing Wang, Guanghua Lei, Rocky S Tuan
Mesenchymal stem cell derived extracellular matrix (MSC-ECM) is a natural biomaterial with robust bioactivity and good biocompatibility, and has been studied as a scaffold for tissue engineering. In this investigation, we tested the applicability of using decellularized human bone marrow derived MSC-ECM (hBMSC-ECM) as a culture substrate for chondrocyte expansion in vitro, as well as a scaffold for chondrocyte-based cartilage repair. hBMSC-ECM deposited by hBMSCs cultured on tissue culture plastic (TCP) was harvested, and then subjected to a decellularization process to remove hBMSCs...
January 6, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29289745/performance-and-stability-analysis-of-curcumin-dye-as-a-photo-sensitizer-used-in-nanostructured-zno-based-dssc
#9
D Sinha, D De, A Ayaz
Environmental friendly natural dye curcumin extracted from low-cost Curcumina longa stem is used as a photo-sensitizer for the fabrication of ZnO-based dye-sensitized solar cells (DSSC). Nanostructured ZnO is fabricated on a transparent conducting glass (TCO), using a cost-effective chemical bath deposition technique. Scanning electron microscopic images show hexagonal patterned ZnO nano-towers decorated with several nanosteps. The average length of ZnO nano-tower is 5μm and diameter is 1.2μm. The UV-Vis spectroscopic study of the curcumin dye is used to understand the light absorption behavior as well as band gap energy of the extracted natural dye...
December 26, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29281035/cellular-responses-and-gene-expression-profiles-of-colonic-lgr5-stem-cells-after-low-dose-low-dose-rate-radiation-exposure
#10
Kensuke Otsuka, Keiji Suzuki, Yuki Fujimichi, Masanori Tomita, Toshiyasu Iwasaki
We previously found that high-dose-rate radiation induced a replenishment of the colonic Lgr5+ stem cell pool, whereas low-dose-rate radiation did not. To identify key molecules that determine the dose-rate effects on this stem cell pool, we harvested colonic Lgr5+ stem cells by cell sorting at 2 weeks after exposure to 1 Gy of high-dose-rate (30 Gy/h) or low-dose-rate (0.003 Gy/h) radiation and analyzed their gene expression profiles using RNA-Seq. We found that pathways related to DNA damage response, cell growth, cell differentiation and cell death were upregulated in Lgr5+ stem cells irradiated with high dose rates, whereas pathways related to apical junctions and extracellular signaling were upregulated in low-dose-rate-irradiated colonic Lgr5+ stem cells...
December 21, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/29280323/biomimetic-tissue-engineered-bone-substitutes-for-maxillofacial-and-craniofacial-repair-the-potential-of-cell-sheet-technologies
#11
REVIEW
Fabien Kawecki, William P Clafshenkel, Michel Fortin, François A Auger, Julie Fradette
Maxillofacial defects are complex lesions stemming from various etiologies: accidental, congenital, pathological, or surgical. A bone graft may be required when the normal regenerative capacity of the bone is exceeded or insufficient. Surgeons have many options available for bone grafting including the "gold standard" autologous bone graft. However, this approach is not without drawbacks such as the morbidity associated with harvesting bone from a donor site, pain, infection, or a poor quantity and quality of bone in some patient populations...
December 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29280320/convenient-monitoring-system-of-intracellular-microrna-expression-during-adipogenesis-via-mechanical-stimulus-induced-exocytosis-of-lipovesicular-mirna-beacon
#12
Seungmin Han, Byunghoon Kang, Eunji Jang, Jisun Ki, Eunjung Kim, Mun-Young Jeong, Yong-Min Huh, Hye-Young Son, Seungjoo Haam
Noninvasive investigation of microRNAs (miRNAs) expression, which is deeply related to biological phenomena such as stem cell differentiation, in culture soup is particularly useful for monitoring of stem cell differentiation without phototoxicity of living cells, especially when cell morphologies remain unchanged during differentiation. However, real-time detection of miRNA in culture soup is not recommended because of insufficient miRNA amounts in culture soup. In this study, a convenient method is introduced for real-time assessing intracellular miRNA in culture soup by using lipovesicular miRNA beacon (Lipo-mB) and mechanical stimulus-mediated exocytosis...
December 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29280310/osteogenic-stimulation-of-human-adipose-derived-mesenchymal-stem-cells-using-a-fungal-metabolite-that-suppresses-the-polycomb-group-protein-ezh2
#13
Rebekah M Samsonraj, Amel Dudakovic, Bushra Manzar, Buer Sen, Allan B Dietz, Simon M Cool, Janet Rubin, Andre J van Wijnen
Strategies for musculoskeletal tissue regeneration apply adult mesenchymal stem/stromal cells (MSCs) that can be sourced from bone marrow- and lipo-aspirates. Adipose tissue-derived MSCs are more easily harvested in the large quantities required for skeletal tissue-engineering approaches, but are generally considered to be less osteogenic than bone marrow MSCs. Therefore, we tested a new molecular strategy to improve their osteogenic lineage-differentiation potential using the fungal metabolite cytochalasin D (CytoD)...
December 27, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29277910/associated-factors-of-umbilical-cord-blood-collection-quality
#14
REVIEW
Lionel Faivre, Chloé Couzin, Hélène Boucher, Thomas Domet, André Desproges, Olivier Sibony, Marina Bechard, Valérie Vanneaux, Jérôme Larghero, Audrey Cras
After 30 years of hematopoietic stem cell use for various indications, umbilical cord blood is considered as an established source of cells with marrow and postmobilization peripheral blood. The limited number of cells still remains a problematic element restricting their use, especially in adults who require to be grafted with a higher cell number. Improving the quality of harvested cord blood, at least in terms of volume and amount of cells, is essential to decrease the number of discarded units. In this review, we examine several variables related to parturient, pregnancy, labor, delivery, collection, the newborn, umbilical cord, and placenta...
December 25, 2017: Transfusion
https://www.readbyqxmd.com/read/29275618/-effects-of-non-muscle-myosin-%C3%A2-a-silenced-bone-marrow-mesenchymal-stem-cells-on-lung-damage-of-rats-at-early-stage-of-smoke-inhalation-injury
#15
M Z Liu, J J Wang, Z H Fu, Y C Li, Z Y Jiang, W Sun, G H Guo, F Zhu
Objective: To investigate the effects of non-muscle myosin ⅡA (NMⅡA) silenced bone marrow mesenchymal stem cells (BMSCs) on the lung damage of rats at early stage of smoke inhalation injury. Methods: Forty Sprague-Dawley rats were divided into control, simple injury, NMⅡA-BMSCs, and BMSCs groups according to the completely random method, with 10 rats in each group. Rats in control group inhaled air normally, while rats in the latter 3 groups inhaled smoke to reproduce model of smoke inhalation injury...
December 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/29251710/mesenchymal-stem-cell-derived-extracellular-vesicles-attenuate-pulmonary-vascular-permeability-and-lung-injury-induced-by-hemorrhagic-shock-and-trauma
#16
Daniel R Potter, Byron Y Miyazawa, Stuart L Gibb, Xutao Deng, Padma P Togaratti, Roxanne H Croze, Amit K Srivastava, Alpa Trivedi, Michael Matthay, John B Holcomb, Martin A Schreiber, Shibani Pati
BACKGROUND: Mesenchymal Stem Cells (MSCs) have been shown to mitigate vascular permeability in hemorrhagic shock (HS) and trauma induced brain and lung injury. Mechanistically, paracrine factors secreted from MSCs have been identified that can recapitulate many of the potent biologic effects of MSCs in animal models of disease. Interestingly, MSC derived extracellular vesicles (EVs), contain many of these key soluble factors, and have therapeutic potential independent of the parent cells...
December 14, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29251705/human-adipose-derived-stem-cell-asc-treatment-modulates-cellular-protection-in-both-in-vitro-and-in-vivo-traumatic-brain-injury-models
#17
Nikolas S Kappy, Shaohua Chang, William M Harris, Michael Plastini, Telisha Ortiz, Ping Zhang, Joshua P Hazelton, Jeffrey P Carpenter, Spencer A Brown
BACKGROUND: Traumatic brain injury (TBI) is a common cause of morbidity and mortality in the civilian population. The purpose of this study is to examine the effect(s) of ASC treatment on cellular and functional recovery in TBI via both in vitro and in vivo methods. METHODS: Cultured neuroblastoma cells, SH-SY5Y, were scratched to mimic TBI in an in vitro model. The effect of ASC conditioned medium on cell death, mitochondrial function, and expression of inflammatory cytokines (TNF-α, IL-1β and IL-6) as well as apoptosis marker FAS was measured...
December 14, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29246895/mirna-22-is-a-novel-mediator-of-vascular-smooth-muscle-cell-phenotypic-modulation-and-neointima-formation
#18
Feng Yang, Qishan Chen, Shiping He, Mei Yang, Eithne Margaret Maguire, Weiwei An, Tayyab Adeel Afzal, Le Anh Luong, Li Zhang, Qingzhong Xiao
Background -MicroRNA-22 (miR-22) has recently been reported to play a regulatory role during vascular smooth muscle cell (VSMC) differentiation from stem cells, but little is known about its target genes and related pathways in mature VSMC phenotypic modulation or its clinical implication in neointima formation following vascular injury. Methods -We applied wire-injury mouse model as well as local delivery of AgomiR-22 or miR-22 inhibitor to explore the therapeutic potential of miR-22 in vascular diseases. Furthermore, normal and diseased human femoral arteries were harvested and various in vivo, ex vivo, and in vitro models of VSMC phenotype switching were conducted to examine miR-22 expression during VSMC phenotype switching...
December 15, 2017: Circulation
https://www.readbyqxmd.com/read/29246649/utility-of-routine-evaluation-of-sterility-of-cellular-therapy-products-with-or-without-extensive-manipulation-best-practices-and-clinical-significance
#19
Josee Golay, Olga Pedrini, Chiara Capelli, Elisa Gotti, Gianmaria Borleri, Mara Magri, Francesca Vailati, Marco Passera, Claudio Farina, Alessandro Rambaldi, Martino Introna
BACKGROUND: We analyzed the results of routine sterility testing performed in our center over the last 10 years, in the context both hematopoietic stem cell transplantation (HSCT) and Advanced Therapeutic Medicinal Products (ATMPs). METHODS: For sterility tests 14-day cultures were performed in culture media detecting aerobic and anaerobic microorganisms. RESULTS: In this study, 22/1643 (1.3%) of apheretic products for autologous or allogeneic HSCT were contaminated, whereas 14/73 bone marrow (BM) harvests (17...
December 12, 2017: Cytotherapy
https://www.readbyqxmd.com/read/29239597/degradation-of-bioresorbable-mg-4zn-1sr-intramedullary-pins-and-associated-biological-responses-in-vitro-and-in-vivo
#20
Aaron F Cipriano, Jiajia Lin, Alan Lin, Amy Sallee, Belinda Le, Mayra Celene Cortez Alcaraz, Ren-Guo Guan, Gary Botimer, Serkan Inceoğlu, Huinan Liu
This article reports the degradation and biological properties of as-drawn Mg-4Zn-1Sr (designated as ZSr41) and pure Mg (P-Mg) wires as bioresorbable intramedullary pins for bone repair. Specifically, their cytocompatibility with bone marrow derived mesenchymal stem cells (BMSCs) and degradation in vitro, and their biological effects on peri-implant tissues and in vivo degradation in rat tibiae were studied. The as-drawn ZSr41 pins showed a significantly faster degradation than P-Mg in vitro and in vivo. The in vivo average daily degradation rates of both ZSr41 and P-Mg intramedullary pins were significantly greater than their respective in vitro degradation rates, likely because the intramedullary site of implantation is highly vascularized for removal of degradation products...
December 14, 2017: ACS Applied Materials & Interfaces
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