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https://www.readbyqxmd.com/read/29332257/kynurenic-acid-and-its-derivatives-are-able-to-modulate-the-adhesion-and-locomotion-of-brain-endothelial-cells
#1
Eszter Lajkó, Bernadett Tuka, Ferenc Fülöp, István Krizbai, József Toldi, Kálmán Magyar, László Vécsei, László Kőhidai
The neuroprotective actions of kynurenic acid (KYNA) and its derivatives in several neurodegenerative disorders [characterized by damage to the cerebral endothelium and to the blood-brain barrier (BBB)] are well established. Cell-extracellular matrix (ECM) adhesion is supposedly involved in recovery of impaired cerebral endothelium integrity (endothelial repair). The present work aimed to investigate the effects of KYNA and its synthetic derivatives on cellular behaviour (e.g. adhesion and locomotion) and on morphology of the GP8 rat brain endothelial cell line, modeling the BBB endothelium...
January 13, 2018: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29331806/unifying-in%C3%A2-vitro-and-in%C3%A2-vivo-ivt-mrna-expression-discrepancies-in-skeletal-muscle-via-mechanotransduction
#2
Sushma M Bhosle, Kristin H Loomis, Jonathan L Kirschman, Emmeline L Blanchard, Daryll A Vanover, Chiara Zurla, Damien Habrant, Darin Edwards, Patrick Baumhof, Bruno Pitard, Philip J Santangelo
The translational efficiency of an in vitro transcribed (IVT) mRNA was measured upon delivery to primary skeletal muscle cells and to a mouse model system, towards the development of a predictive in vitro assay for the screening and validation of intramuscular mRNA-based vaccines. When IVT mRNA was delivered either naked or complexed with novel aminoglycoside-based delivery vehicles, significant differences in protein expression in vitro and in vivo were observed. We hypothesized that this previously anticipated discrepancy was due to differences in the mechanism of IVT mRNA endosomal entry and release following delivery...
January 6, 2018: Biomaterials
https://www.readbyqxmd.com/read/29331689/baicalin-inhibits-pressure-overload-induced-cardiac-fibrosis-through-regulating-ampk-tgf-%C3%AE-smads-signaling-pathway
#3
Yichuan Xiao, Jiantao Ye, Ying Zhou, Junjun Huang, Xiawen Liu, Biyun Huang, Liu Zhu, Bo Wu, Genshui Zhang, Yi Cai
AMP-activated protein kinase (AMPK) is a central regulator of multiple metabolic pathways. It has been shown that activation of AMPK could inhibit fibroblast proliferation and extracellular matrix (ECM) accumulation, thereby suppressing cardiac fibrosis. Baicalin, the major component found in skullcap, possesses multiple protective effects on the cardiovascular system. However, little is known about the effect of baicalin on cardiac fibrosis and the molecular mechanism by which baicalin exerts its anti-fibrotic effects has not been investigated...
January 10, 2018: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29330574/ectomycorrhizal-fungal-communities-in-alpine-relict-forests-of-pinus-pumila-on-mt-norikura-japan
#4
Takahiko Koizumi, Masahira Hattori, Kazuhide Nara
Ectomycorrhizal (ECM) symbioses are indispensable for the establishment of host trees, yet available information of ECM symbiosis in alpine forests is scarce. Pinus pumila is a typical ice age relict tree species in Japan and often forms monodominant dwarf vegetation above the tree line in mountains. We studied ECM fungi colonizing P. pumila on Mt. Norikura, Japan, with reference to host developmental stages, i.e., from current-year seedlings to mature trees. ECM fungal species were identified based on rDNA ITS sequences...
January 12, 2018: Mycorrhiza
https://www.readbyqxmd.com/read/29330502/targeting-insulin-like-growth-factor-i-and-extracellular-matrix-interactions-in-melanoma-progression
#5
Berline Murekatete, Ali Shokoohmand, Jacqui McGovern, Lipsa Mohanty, Christoph Meinert, Brett G Hollier, Alfred Zippelius, Zee Upton, Abhishek S Kashyap
Insulin-like growth factor (IGF)-I binds to the ECM protein vitronectin (VN) through IGF binding proteins (IGFBPs) to enhance proliferation and migration of skin keratinocytes and fibroblasts. Although evidence exists for the role of individual components of the complex (IGF-I, IGFBP-3 and VN), the cellular functions stimulated by these proteins together as a complex remains un-investigated in melanoma cells. We report here that the IGF-I:IGFBP-3:VN trimeric complex stimulates a dose-dependent increase in the proliferation and migration of WM35 and Sk-MEL28 melanoma cells...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330287/targeted-akt-inhibition-in-prostate-cancer-cells-and-spheroids-reduces-aerobic-glycolysis-and-generation-of-hyperpolarized-1-13c-lactate
#6
Sui Seng Tee, Izabela Suster, Steven Truong, Sangmoo Jeong, Roozbeh Eskandari, Valentina Di Gialleonardo, Julio A Alvarez, Hannah N Aldeborgh, Kayvan Keshari
The PI3K/AKT/mTOR (PAM) signaling pathway is frequently mutated in prostate cancer. Specific AKT inhibitors are now in advanced clinical trials and this study investigates the effect of MK2206, a non-ATP competitive inhibitor, on the cellular metabolism in the context of prostate cancer. A significant reduction in cell motility and aerobic glycolysis was observed in prostate cancer cells with treatment. These changes were not accompanied by a reduction in the ratio of high-energy phosphates or a change in total protein levels of enzymes (e...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29330113/runt-related-transcription-factor-1-runx1-deficiency-attenuates-inflammation-induced-pro-inflammatory-and-pro-labour-mediators-in-myometrium
#7
Martha Lappas
Identifying new targets that regulate myometrial activation are required to develop effective treatments to stop preterm labor. Inflammation, which can be induced by sterile or infective insults, plays a role in initiating and maintaining uterine contractions. Several high throughput transcription screening studies have identified an upregulation of runt-related transcription factor 1 (RUNX1) mRNA expression in myometrium with labor. The role of RUNX1 in labor, however, is not known. We report increased RUNX1 during late gestation which was further augmented in labor, suggesting that RUNX1 may be involved in the transition of the myometrium from a quiescent into a contractile state in preparation for labor...
January 9, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29330036/regulation-of-fibrotic-changes-by-the-synergistic-effects-of-cytokines-dimensionality-and-matrix-towards-the-development-of-an-in-vitro-human-dermal-hypertrophic-scar-model
#8
Shikha Chawla, Sourabh Ghosh
Current therapeutic strategies to reduce scarring in full thickness skin defect offer limited success due to poor understanding of scar tissue formation and the underlying signaling pathways. There is an urgent need to develop human cell based in vitro scar tissue models as animal testing is associated with ethical and logistic complications and inter-species variations. Pro-inflammatory cytokines play critical role in regulating scar development through complex interplay and interaction with the ECM and corresponding signaling pathways...
January 9, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29330021/ccn4-wisp1-controls-cutaneous-wound-healing-by-modulating-proliferation-migration-and-ecm-expression-in-dermal-fibroblasts-via-%C3%AE-5%C3%AE-1-and-tnf%C3%AE
#9
Mitsuaki Ono, Asuka Masaki, Azusa Maeda, Tina M Kilts, Emilio S Hara, Taishi Komori, Hai Pham, Takuo Kuboki, Marian F Young
Understanding the mechanisms that control cutaneous wound healing is crucial to successfully manage repair of damaged skin. The goal of the current study was to uncover novel extracellular matrix (ECM) components that control the wound healing process. Full thickness skin defects were created in mice and used to show CCN4 up-regulation during wound-healing as early as 1 day after surgery, suggesting a role in inflammation and subsequent dermal migration and proliferation. To determine how CCN4 could regulate wound healing we used Ccn4-KO mice and showed they had delayed wound closure accompanied by reduced expression of Col1a1 and Fn mRNA...
January 9, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29329595/human-umbilical-cord-mesenchymal-stem-cell-conditioned-medium-attenuates-renal-fibrosis-by-reducing-inflammation-and-epithelial-to-mesenchymal-transition-via-the-tlr4-nf-%C3%AE%C2%BAb-signaling-pathway-in-vivo-and-in-vitro
#10
Bo Liu, Fengxia Ding, Dong Hu, Yu Zhou, Chunlan Long, Lianju Shen, Yuanyuan Zhang, Deying Zhang, Guanghui Wei
BACKGROUND: Renal fibrosis is characterized by infiltration of interstitial inflammatory cells and release of inflammatory mediators, activation and proliferation of fibroblasts, and deposition of excessive extracellular matrix (ECM). The aim of this study was to evaluate the effect of human umbilical cord-derived mesenchymal stem cell (hucMSC) conditioned medium (CM) on renal tubulointerstitial inflammation and fibrosis. METHODS: Renal interstitial fibrosis was prepared in vivo using the unilateral ureteral obstruction (UUO)...
January 12, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29329231/development-of-a-cytocompatible-scaffold-from-pig-immature-testicular-tissue-allowing-human-sertoli-cell-attachment-proliferation-and-functionality
#11
Maxime Vermeulen, Federico Del Vento, Francesca de Michele, Jonathan Poels, Christine Wyns
Cryopreservation of immature testicular tissue before chemo/radiotherapy is the only option to preserve fertility of cancer-affected prepubertal boys. To avoid reintroduction of malignant cells, development of a transplantable scaffold by decellularization of pig immature testicular tissue (ITT) able to support decontaminated testicular cells could be an option for fertility restoration in these patients. We, therefore, compared decellularization protocols to produce a cytocompatible scaffold. Fragments of ITT from 15 piglets were decellularized using three protocols: sodium dodecyl sulfate (SDS)-Triton (ST), Triton-SDS-Triton (TST) and trypsin 0...
January 12, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29329077/nano-hydroxyapatite-blasted-titanium-surface-creates-a-biointerface-able-to-govern-src-dependent-osteoblast-metabolism-as-prerequisite-to-ecm-remodeling
#12
Célio J C Fernandes, Fábio Bezerra, Marcel R Ferreira, Amanda F C Andrade, Thais Silva Pinto, Willian F Zambuzzi
Over the last several years, we have focused on the importance of intracellular signaling pathways in dynamically governing the biointerface between pre-osteoblast and surface of biomaterial. Thus, this study investigates the molecular hallmarks involved in the pre-osteoblast relationship with different topography considering Machined (Mc), Dual Acid-Etching (DAE), and nano hydroxyapatite-blasted (nHA) groups. There was substantial differences in topography of titanium surface, considering Atomic Force Microscopy and water contact angle (Mc = 81...
December 28, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29329074/goat-tendon-collagen-human-fibrin-hydrogel-for-comprehensive-parametric-evaluation-of-huvec-microtissue-based-angiogenesis
#13
Rajan Narayan, Tarun Agarwal, Debasish Mishra, Tapas Kumar Maiti, Sujata Mohanty
The cell and extracellular matrix (ECM) interactions play a very important role during angiogenesis. Remodeling of the extracellular matrix along with pro-angiogenic/anti-angiogenic factors, and matrix-degrading proteases, accounts for endothelial cell growth, migration, and tube formation. However, for studying angiogenesis, only limited and expensive biomaterials are available. Despite being biocompatible, inexpensive, and easy availability; the potential of goat tendon collagen (GTC) has never been explored for vascular tissue engineering applications...
January 2, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29327777/the-use-of-acellular-dermal-matrices-adm-in-breast-reconstruction-a-review
#14
Christian Eichler, Carolin Schulz, Nadine Vogt, Mathias Warm
The use of acellular dermal matrices (ADM), sometimes referred to as extracellular matrix (ECM), has become an interesting aspect of breast reconstruction. A great deal of literature is available, totaling over 7000 ADM-based reconstructions. Most often, ADMs are used in a skin sparing mastectomy (SSM) scenario, although heterologous breast augmentation with a sub-pectoral fixation may also require an ADM application. Their use has become an attractive, but expensive option. Available data shows head to head comparisons between individual ADMs to be mostly retrospective in nature with only a few prospective trials available...
December 22, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29326062/functional-effects-of-an-interpenetrating-polymer-network-on-articular-cartilage-mechanical-properties
#15
Janne Ta Mäkelä, Benjamin G Cooper, Rami K Korhonen, Mark W Grinstaff, Brian D Snyder
OBJECTIVE: Depletion of glycosaminoglycans (GAGs) and degradation of collagen network are early hallmarks of osteoarthritis. Currently, there are no chondroprotective therapies that mitigate the loss of GAGs or effectively restore the collagen network. Recently, a novel polymeric cartilage supplement was described that forms a charged interpenetrating polymer network (IPN) reconstituting the hydrophilic properties of the extracellular matrix. To investigate the mechanism by which this hydrophilic IPN improves articular cartilage material properties, a finite element (FE) model is used to evaluate the IPN's effect on the fibrillar collagen network, nonfibrillar matrix, and interstitial fluid flow...
January 8, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29322326/heparan-sulfate-accumulation-and-perlecan-hspg2-up-regulation-in-tumour-tissue-predict-low-relapse-free-survival-for-patients-with-glioblastoma
#16
Galina M Kazanskaya, Alexandra Y Tsidulko, Alexander M Volkov, Roman S Kiselev, Anastasia V Suhovskih, Vyacheslav V Kobozev, Alexei S Gaytan, Svetlana V Aidagulova, Alexei L Krivoshapkin, Elvira V Grigorieva
Glycosaminoglycans are major components of brain extracellular matrix (ECM), although heparan sulfate (HS) contribution in brain physiology and carcinogenesis remains underinvestigated. This study examined HS content and distribution in glioblastoma multiforme (GBM) tissues in the context of potential molecular mechanisms underlying its deregulation in brain tumours. Totally, 42 tissue samples and paraffin-embedded tissues for 31 patients with different prognosis were investigated. HS expression was demonstrated in 50-55% of the GBM tumours by immunohistochemistry (IHC), while almost no HS content was detected in the surrounding paratumourous brain tissues...
January 10, 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29321510/a-model-of-human-lung-fibrogenesis-for-the-assessment-of-anti-fibrotic-strategies-in-idiopathic-pulmonary-fibrosis
#17
Katy M Roach, Amanda Sutcliffe, Laura Matthews, Gill Elliott, Chris Newby, Yassine Amrani, Peter Bradding
Idiopathic pulmonary fibrosis (IPF) is a progressive interstitial lung disease with limited therapeutic options. KCa3.1 ion channels play a critical role in TGFβ1-dependent pro-fibrotic responses in human lung myofibroblasts. We aimed to develop a human lung parenchymal model of fibrogenesis and test the efficacy of the selective KCa3.1 blocker senicapoc. 2 mm3 pieces of human lung parenchyma were cultured for 7 days in DMEM ± TGFβ1 (10 ng/ml) and pro-fibrotic pathways examined by RT-PCR, immunohistochemistry and collagen secretion...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320372/a-dentin-derived-hydrogel-bioink-for-3d-bioprinting-of-cell-laden-scaffolds-for-regenerative-dentistry
#18
Avathamsa Athirasala, Anthony Tahayeri, Greeshma Thrivikraman, Cristiane M França, Nelson Monteiro, Victor Tran, Jack Ferracane, Luiz E Bertassoni
Recent studies in tissue engineering have adopted extracellular matrix (ECM) derived scaffolds as natural and cytocompatible microenvironments for tissue regeneration. The dentin matrix, specifically, has been shown to be associated with a host of soluble and insoluble signaling molecules that can promote odontogenesis. Here, we have developed a novel bioink, blending printable alginate (3% w/v) hydrogels with the soluble and insoluble fractions of the dentin matrix. We have optimized the printing parameters and the concentrations of the individual components of the bioink for print accuracy, cell viability and odontogenic potential...
January 10, 2018: Biofabrication
https://www.readbyqxmd.com/read/29318958/a-cell-engineered-small-intestinal-submucosa-based-bone-mimetic-construct-for-bone-regeneration
#19
Mei Li, Chi Zhang, Yuxing Mao, Yi Zhong, Jiyuan Zhao
Extracellular matrix (ECM)-ornamented biomaterials have attracted attention due to their high potential to improve the bio-functionality of original materials. It is thought that ECM with a bone mimetic microenvironment generated by the specific induction of osteoblasts would be more beneficial for bone regeneration than regular ECM. In this study, we developed an osteogenic and mineralized ECM construct (Os/M-ECM-SIS) under the guidance of osteoblasts on a small intestinal submucosa (SIS) scaffold co-treated with icariin and calcium...
January 10, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29318564/strategies-to-target-matrix-metalloproteinases-as-therapeutic-approach-in-cancer
#20
Zoi Piperigkou, Dimitra Manou, Konstantina Karamanou, Achilleas D Theocharis
Matrix metalloproteinases (MMPs) are a family of zinc-dependent endopeptidases that are capable of degrading numerous extracellular matrix (ECM) components thus participating in physiological and pathological processes. Apart from the remodeling of ECM, they affect cell-cell and cell-matrix interactions and are implicated in the development and progression of various diseases such as cancer. Numerous studies have demonstrated that MMPs evoke epithelial to mesenchymal transition (EMT) of cancer cells and affect their signaling, adhesion, migration and invasion to promote cancer cell aggressiveness...
2018: Methods in Molecular Biology
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