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https://www.readbyqxmd.com/read/29691054/sun-mediated-mechanical-linc-between-nucleus-and-cytoskeleton-regulates-%C3%AE-catenin-nuclear-access
#1
Gunes Uzer, Guniz Bas, Buer Sen, Zhihui Xie, Scott Birks, Melis Olcum, Cody McGrath, Maya Styner, Janet Rubin
βcatenin acts as a primary intracellular signal transducer for mechanical and Wnt signaling pathways to control cell function and fate. Regulation of βcatenin in the cytoplasm has been well studied but βcatenin nuclear trafficking and function remains unclear. In a previous study we showed that, in mesenchymal stem cells (MSC), mechanical blockade of adipogenesis relied on inhibition of βcatenin destruction complex element GSK3β (glycogen synthase kinase 3β) to increase nuclear βcatenin as well as the function of Linker of Cytoskeleton and Nucleoskeleton (LINC) complexes, suggesting that these two mechanisms may be linked...
April 12, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29689574/preventive-effect-of-mesenchymal-stem-cell-culture-supernatant-on-luminal-stricture-after-endoscopic-submucosal-dissection-in-the-rectum-of-pigs
#2
Momoko Tsuda, Shunsuke Ohnishi, Takeshi Mizushima, Hidetaka Hosono, Kenichi Yamahara, Marin Ishikawa, Satoshi Abiko, Takehiko Katsurada, Yuichi Shimizu, Naoya Sakamoto
BACKGROUND:  Mesenchymal stem cells (MSCs) are valuable in regenerative medicine, and MSC culture supernatant (MSC-CS) reportedly inhibits inflammation and fibrosis. We investigated whether colorectal luminal stricture develops after circumferential endoscopic submucosal dissection (ESD) in the colorectum, and whether the development of luminal stricture could be prevented by using MSC-CS enema. METHODS:  In the first experiment, we performed circumferential ESD in the rectums or distal colons of pigs (n = 4 in each group)...
April 24, 2018: Endoscopy
https://www.readbyqxmd.com/read/29687448/stem-cell-like-populations-and-immunoregulatory-molecules-in-periodontal-granulation-tissue
#3
D A Apatzidou, C Nile, A Bakopoulou, A Konstantinidis, D F Lappin
BACKGROUND AND OBJECTIVES: Determine the presence of mesenchymal stem cells (MSCs) in healthy periodontal tissue and periodontal granulation tissue (GT) and explore associations between immuno-regulatory molecules and selected subgingival microorganisms. MATERIAL AND METHODS: Mesenchymal stem cells were isolated, propagated and characterised by flow cytometry from a region of healthy gingival tissue and inflamed GT of 10 systemically healthy non-smokers with chronic periodontitis...
April 23, 2018: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29687216/fluoxetine-pretreatment-enhances-neurogenic-angiogenic-and-immunomodulatory-effects-of-mscs-on-experimentally-induced-diabetic-neuropathy
#4
Shaimaa A Abdelrahman, Mai A Samak, Sally M Shalaby
Being one of the most debilitating complications among diabetic patients, diabetic polyneuropathy (DPN) is a paramount point of continuous research. Stem cell therapies have shown promising results. However, limited cell survival and paracrine activities hinder its transfer from bench to bedside. We designed this study to evaluate fluoxetine-pretreatment technique of mesenchymal stem cells (MSCs) as an approach to enhance their paracrine and immunomodulatory properties in DPN. Effects of fluoxetine treatment of MSCs were tested in vitro...
April 23, 2018: Cell and Tissue Research
https://www.readbyqxmd.com/read/29686713/human-umbilical-cord-msc-derived-exosomes-suppress-the-development-of-ccl-4-induced-liver-injury-through-antioxidant-effect
#5
Wenqian Jiang, Youwen Tan, Mengjie Cai, Ting Zhao, Fei Mao, Xu Zhang, Wenrong Xu, Zhixin Yan, Hui Qian, Yongmin Yan
Mesenchymal stem cells (MSCs) have been increasingly applied into clinical therapy. Exosomes are small (30-100 nm in diameter) membrane vesicles released by different cell types and possess the similar functions with their derived cells. Human umbilical cord MSC-derived exosomes (hucMSC-Ex) play important roles in liver repair. However, the effects and mechanisms of hucMSC-Ex on liver injury development remain elusive. Mouse models of acute and chronic liver injury and liver tumor were induced by carbon tetrachloride (CCl4 ) injection, followed by administration of hucMSC-Ex via the tail vein...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29686406/the-deubiquitinating-enzyme-uchl1-negatively-regulates-the-immunosuppressive-capacity-and-survival-of-multipotent-mesenchymal-stromal-cells
#6
Yuting Gu, Xinyuan Ding, Jiefang Huang, Mingxing Xue, Jie Zhang, Qiwei Wang, Hongshuang Yu, Yanan Wang, Fang Zhao, Hui Wang, Min Jin, Yeming Wu, Yanyun Zhang
It is known that proinflammatory cytokines empower multipotent mesenchymal stromal cells (MSCs) the immunosuppressive capacity to treat various inflammatory diseases. Nevertheless, how the proinflammatory cytokines modulate the immunosuppressive capacity of MSCs is poorly understood. In the present study, we identified that the deubiquitinating enzyme ubiquitin C-terminal hydrolase 1 (UCHL1) was upregulated in MSCs upon stimulation of proinflammatory cytokines IFN-γ plus TNF-α. Interestingly, through intervening UCHL1 by shRNA knockdown or its inhibitor LDN57444 or overexpression, we found that UCHL1 played a critical role in suppressing cytokines-induced inducible nitric oxide synthase expression in murine MSCs and indoleamine 2,3-dioxygenase expression in human MSCs, thereby restrained their immunosuppressive capacity...
April 23, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29683502/the-c-terminus-of-the-amelogenin-peptide-influences-the-proliferation-of-human-bone-marrow-mesenchymal-stem-cells
#7
Ryo Kunimatsu, Tetsuya Awada, Yuki Yoshimi, Kazuyo Ando, Naoto Hirose, Yuki Tanne, Keisuke Sumi, Kotaro Tanimoto
BACKGROUND: Amelogenins are a family of enamel matrix proteins that are important for formation of enamel. Amelogenins may induce division of mesenchymal stem cells (MSCs), among others. Recently, the C-terminus of the amelogenin peptide (AMG-CP) has been shown to enhance the proliferation of cementoblast lineage cells. The role of the amelogenin peptide on the proliferation of human MSCs and related alterations in the intracellular signaling pathway were studied. METHODS: MSCs were exposed to AMG-CP in vitro...
April 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29682700/therapeutic-potential-of-a-combination-of-electroacupuncture-and-trkb-expressing-mesenchymal-stem-cells-for-ischemic-stroke
#8
Sung Min Ahn, Yu Ri Kim, Yong-Il Shin, Ki Tae Ha, Seo-Yeon Lee, Hwa Kyoung Shin, Byung Tae Choi
We prepared and grafted tropomyosin receptor kinase B (TrkB) gene-transfected mesenchymal stem cells (TrkB-MSCs) into the ischemic penumbra and investigated whether electroacupuncture (EA) treatment could promote functional recovery from ischemic stroke. For the behavioral test, TrkB-MSCs+EA resulted in significantly improved motor function compared to that obtained with MSCs+EA or TrkB-MSCs alone. At 30 days after middle cerebral artery occlusion (MCAO), the largest number of grafted MSCs was detected in the TrkB-MSC+EA group...
April 22, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29682509/initiation-and-propagation-of-vascular-calcification-is-regulated-by-a-concert-of-platelet-and-smooth-muscle-cell-derived-extracellular-vesicles
#9
Leon J Schurgers, Asim C Akbulut, Dawid M Kaczor, Maurice Halder, Rory R Koenen, Rafael Kramann
The ageing population continues to suffer from its primary killer, cardiovascular disease (CVD). Despite recent advances in interventional medicinal and surgical therapies towards the end of the 20th century, the epidemic of cardiovascular disease has not been halted. Yet, rather than receding globally, the burden of CVD has risen to become a top cause of morbidity and mortality worldwide. Most CVD arises from thrombotic rupture of an atherosclerotic plaque, the pathologic thickening of coronary and carotid artery segments and subsequent distal ischemia in heart or brain...
2018: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29682085/prostaglandin-e-2-produced-by-alginate-encapsulated-mesenchymal-stromal-cells-modulates-the-astrocyte-inflammatory-response
#10
Elizabeth C Stucky, Joshua Erndt-Marino, Rene S Schloss, Martin L Yarmush, David I Shreiber
Astroglia are well known for their role in propagating secondary injury following brain trauma. Modulation of this injury cascade, including inflammation, is essential to repair and recovery. Mesenchymal stromal cells (MSCs) have been demonstrated as trophic mediators in several models of secondary CNS injury, however, there has been varied success with the use of direct implantation due to a failure to persist at the injury site. To achieve sustained therapeutic benefit, we have encapsulated MSCs in alginate microspheres and evaluated the ability of these encapsulated MSCs to attenuate neuro-inflammation...
June 2017: Nano LIFE
https://www.readbyqxmd.com/read/29681950/vitamin-d-promotes-msc-osteogenic-differentiation-stimulating-cell-adhesion-and-%C3%AE-v-%C3%AE-3-expression
#11
Francesca Posa, Adriana Di Benedetto, Elisabetta A Cavalcanti-Adam, Graziana Colaianni, Chiara Porro, Teresa Trotta, Giacomina Brunetti, Lorenzo Lo Muzio, Maria Grano, Giorgio Mori
Vitamin D (Vit D) by means of its biological active form, 1 α ,25-dihydroxyvitamin D3 (1,25(OH)2 D3 ), has a protective effect on the skeleton by acting on calcium homeostasis and bone formation. Furthermore, Vit D has a direct effect on mesenchymal stem cells (MSCs) in stimulating their osteogenic differentiation. In this work, we present for the first time the effect of 1,25(OH)2 D3 on MSC adhesion. Considering that cell adhesion to the substrate is fundamental for cell commitment and differentiation, we focused on the expression of α V β 3 integrin, which has a key role in the commitment of MSCs to the osteoblastic lineage...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29680669/exposing-mesenchymal-stem-cells-to-chondroitin-sulphated-proteoglycans-reduces-their-angiogenic-and-neuro-adhesive-paracrine-activity
#12
Chelsea R Wood, Ibtesam R T Al Delfi, John F Innes, Peter Myint, William E B Johnson
The multifactorial complexity of spinal cord injuries includes the formation of a glial scar, of which chondroitin sulphated proteoglycans (CSPG) are an integral component. Previous studies have shown CSPG to have inhibitory effects on endothelial and neuronal cell growth, highlighting the difficulty of spinal cord regeneration. Mesenchymal stem/stromal cells (MSC) are widely used a cell therapy, and there is mounting evidence for their angiogenic and neurotrophic paracrine properties. However, in vivo studies have observed poor engraftment and survival of MSC when injected into SCI...
April 19, 2018: Biochimie
https://www.readbyqxmd.com/read/29679779/biomimetic-3d-in-vitro-model-of-biofilm-triggered-osteomyelitis-for-investigating-hematopoiesis-during-bone-marrow-infections
#13
Annamarija Raic, Sophie Riedel, Elena Kemmling, Karen Bieback, Joerg Overhage, Cornelia Lee-Thedieck
In this work, we define the requirements for a human-based osteomyelitis model which overcomes the limitations of state of the art animal models. Osteomyelitis is a severe and difficult to treat infection of the bone that develops rapidly, making it difficult to study in humans. We have developed a 3D in vitro model of the bone marrow, comprising a macroporous material, human hematopoietic stem and progenitor cells (HSPCs) and mesenchymal stromal cells (MSCs). Inclusion of biofilms grown on an implant into the model system allowed us to study the effects of postoperative osteomyelitis-inducing bacteria on the bone marrow...
April 18, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29679766/aminoacyl-trna-synthetase-complex-interacting-multifunctional-protein-1-simultaneously-binds-glutamyl-prolyl-trna-synthetase-and-scaffold-protein-aminoacyl-trna-synthetase-complex-interacting-multifunctional-protein-3-of-the-multi-trna-synthetase-complex
#14
Margaret A Schwarz, Daniel D Lee, Seamus Bartlett
Higher eukaryotes have developed extensive compartmentalization of amino acid (aa) - tRNA coupling through the formation of a multi-synthetase complex (MSC) that is composed of eight aa-tRNA synthetases (ARS) and three scaffold proteins: aminoacyl tRNA synthetase complex interacting multifunctional proteins (AIMP1, 2 and 3). Lower eukaryotes have a much smaller complex while yeast MSC consists of only two ARS (MetRS and GluRS) and one ARS cofactor 1 protein, Arc1p (Simos et al., 1996), the homolog of the mammalian AIMP1...
April 18, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29679717/stat-3-regulation-of-cxcr4-is-necessary-for-the-prenylflavonoid-icaritin-to-enhance-mesenchymal-stem-cell-proliferation-migration-and-osteogenic-differentiation
#15
R Z L Lim, L Li, E L Yong, N Chew
Mesenchymal stem cell (MSC) dysfunction has been implicated in the pathogenesis of osteoporosis. MSCs derived from osteoporotic subjects demonstrate significant impairment in proliferation, adhesion and chemotaxis, and osteogenic differentiation, leading to reduced functional bone-forming osteoblasts and ultimately nett bone loss and osteoporosis. Epimedium herbs and its active compound Icaritin (ICT) have been used in Chinese ethnopharmacology for the treatment of metabolic bone diseases. Using an in-vitro cell culture model, we investigated the benefits of ICT treatment in enhancing MSC proliferation, migration and osteogenic differentiation, and provide novel data to describe its mechanism of action...
April 18, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29679328/high-throughput-formation-of-mesenchymal-stem-cell-spheroids-and-entrapment-in-alginate-hydrogels
#16
Charlotte E Vorwald, Steve S Ho, Jacklyn Whitehead, J Kent Leach
Mesenchymal stem cells (MSCs) are a promising cell source for tissue repair and regeneration due to their multilineage capacity, potential for autologous use, and secretion of potent bioactive factors to catalyze the endogenous repair program. However, a major limitation to current cell-based tissue engineering approaches is the drastic loss of cells upon transplantation. The causation of this loss, whether due to apoptosis following a dramatic change in the microenvironment or migration away from the defect site, has yet to be determined...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29679025/combining-electrical-stimulation-and-tissue-engineering-to-treat-large-bone-defects-in-a-rat-model
#17
Liudmila Leppik, Han Zhihua, Sahba Mobini, Vishnu Thottakkattumana Parameswaran, Maria Eischen-Loges, Andrei Slavici, Judith Helbing, Lukas Pindur, Karla M C Oliveira, Mit B Bhavsar, Lukasz Hudak, Dirk Henrich, John H Barker
Bone Tissue engineering (BTE) has recently been introduced as an alternative to conventional treatments for large non-healing bone defects. BTE approaches mimic autologous bone grafts, by combining cells, scaffold, and growth factors, and have the added benefit of being able to manipulate these constituents to optimize healing. Electrical stimulation (ES) has long been used to successfully treat non-healing fractures and has recently been shown to stimulate bone cells to migrate, proliferate, align, differentiate, and adhere to bio compatible scaffolds, all cell behaviors that could improve BTE treatment outcomes...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29678576/aging-impairs-beige-adipocyte-differentiation-of-mesenchymal-stem-cells-via-the-reduced-expression-of-sirtuin-1
#18
Vuong Cat Khanh, Amin Firman Zulkifli, Chiho Tokunaga, Toshiharu Yamashita, Yuji Hiramatsu, Osamu Ohneda
In the body, different types of adipose tissue perform different functions, with brown and beige adipose tissues playing unique roles in dissipating energy. Throughout life, adipocytes are regenerated from progenitors, and this process is impaired by aging. One of the progenitors of adipocytes are mesenchymal stem cells (MSCs), which have recently become a promising tool for stem cell therapy. However, whether or not aging impairs the brown/beige adipocyte differentiation of adipose tissue-derived MSCs (AT-MSCs) remains unclear...
April 17, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29678307/viability-and-functionality-of-mesenchymal-stromal-cells-loaded-on-collagen-microspheres-and-incorporated-into-plasma-clots-for-orthopaedic-application-effect-of-storage-conditions
#19
Olga Wittig, Dylana Diaz-Solano, José Cardier
BACKGROUND: There is evidence showing that human mesenchymal stromal cells (MSC) seeded on collagen microspheres (CM) and incorporated into platelet rich plasma (PRP) clots induce bone formation. For clinical trials it is very important to establish standardization of storage and shipment conditions to ensure the viability and functionality of cellular products. We investigate the effect of storage temperature and time on the viability and functionality of human MSC seeded on CM and included into PRP clots for using in the further clinical application for bone regeneration...
April 5, 2018: Injury
https://www.readbyqxmd.com/read/29678077/use-of-system-dynamics-modeling-in-medical-education-and-research-projects
#20
Jadranka Bozikov, Danko Relic, Gjuro Dezelic
The paper reviews experiences and accomplishments in application of system dynamics modeling in education, training and research projects at the Andrija Stampar School of Public Health, a branch of the Zagreb University School of Medicine, Croatia. A number of simulation models developed over the past 40 years are briefly described with regard to real problems concerned, objectives and modeling methods and techniques used. Many of them have been developed as the individual students' projects as a part of their graduation, MSc or PhD theses and subsequently published in journals or conference proceedings...
2018: Studies in Health Technology and Informatics
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