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https://www.readbyqxmd.com/read/28526752/the-apical-ecm-preserves-embryonic-integrity-and-distributes-mechanical-stress-during-morphogenesis
#1
Thanh Thi Kim Vuong-Brender, Shashi Kumar Suman, Michel Labouesse
Epithelia are bound by both basal and apical extracellular matrices (ECM). While the composition and function of the former have been intensively investigated, less is known about the latter. The embryonic sheath, the ECM apical to the C. elegans embryonic epidermis, has been suggested to promote its elongation. In an RNAi screen for the components of the sheath, we identified the Zona Pellucida domain proteins NOAH-1 and NOAH-2. We found that these proteins act in the same pathway, and in parallel to three other putative sheath proteins, SYM-1, LET-4 and FBN-1/Fibrillin, to ensure embryonic integrity and promote elongation...
May 19, 2017: Development
https://www.readbyqxmd.com/read/28526562/new-intracellular-activities-of-matrix-metalloproteinases-shine-in-the-moonlight
#2
REVIEW
Parker G Jobin, Georgina S Butler, ChristopherM Overall
Adaption of a single protein to perform multiple independent functions facilitates functional plasticity of the proteome allowing a limited number of protein-coding genes to perform a multitude of cellular processes. Multifunctionality is achievable by post-translational modifications and by modulating subcellular localization. Matrix metalloproteinases (MMPs), classically viewed as degraders of the extracellular matrix (ECM) responsible for matrix protein turnover, are more recently recognized as regulators of a range of extracellular bioactive molecules including chemokines, cytokines, and their binders...
May 16, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28526405/hypoxia-inducible-factor-l%C3%AE-mediates-aggrecan-and-collagen-%C3%AE-expression-via-notch1-signaling-in-nucleus-pulposus-cells-during-intervertebral-disc-degeneration
#3
Zhuochao Liu, Changwei Li, Xiangchao Meng, Yunting Bai, Jin Qi, Jun Wang, Qi Zhou, Weibin Zhang, Xingkai Zhang
Although hypoxia-inducible factor-lα (HIF-lα) has been reported to have an important role in the metabolism and synthesis of the extracellular matrix (ECM) of nucleus pulposus cells (NPCs), the underlying mechanism has not been fully clarified. Here, we show for the first time that NOTCH1 expression is decreased in NPs isolated from degenerated human intervertebral discs (IVDs), as well as in the NPs of NP-specific HIF-1α(-/-) mice. Our study reveals that overexpression of HIF-1α leads to increased expression of NOTCH1, the NOTCH1 ligand JAGGED1, and its target gene hairy and enhancer of split-1 (HES1), while also upregulating collagen Π and aggrecan expression in human NPCs...
May 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28526238/ric8a-is-essential-for-the-organisation-of-actin-cytoskeleton-and-cell-matrix-interaction
#4
Katrin Ruisu, Riho Meier, Keiu Kask, Tambet Tõnissoo, Teet Velling, Margus Pooga
RIC8A functions as a chaperone and guanine nucleotide exchange factor for a subset of G protein α subunits. Multiple G protein subunits mediate various signalling events that regulate cell adhesion and migration and the involvement of RIC8A in some of these processes has been demonstrated. We have previously shown that the deficiency of RIC8A causes a failure in mouse gastrulation and neurogenesis - major events in embryogenesis that rely on proper association of cells with the extracellular matrix (ECM) and involve active cell migration...
May 16, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28525322/a-systemic-review-of-existing-serological-possibilities-to-diagnose-canine-osteoarthritis-with-a-particular-focus-on-extracellular-matrix-proteoglycans-and-protein
#5
M Shahid, G Manchi, P Slunsky, O Naseer, A Fatima, B Leo, J Raila
Extra-cellular matrix (ECM) components are important and their stabilization is significant in maintaining normal healthy joint environment. In osteoarthritis (OA), ECM components are altered and indicate disease progression. The joint ECM is composed of proteoglycans (aggrecan, perlecan, inter α-trypsin inhibitor), glycoproteins (fibronectin, lubricin, COMP) and collagen types (most abundantly collagen type II) which represent structural and functional transformation during disease advancement. ECM investigation revealed significant biomarkers of OA that could be used as a diagnostic and therapeutic tool in different canine orthopedic diseases...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28523980/diverse-endometrial-mrna-signatures-during-the-window-of-implantation-in-patients-with-repeated-implantation-failure
#6
Cheng Shi, Hong Jing Han, Li Juan Fan, Jing Guan, Xing Bang Zheng, Xi Chen, Rong Liang, Xiao Wei Zhang, Kun Kun Sun, Qing Hua Cui, Huan Shen
High endometrial receptivity in the window of implantation (WOI) is essential for successful implantation. However, a diagnostic tool with high specificity for impaired endometrial receptivity remains to be developed. We collected endometrium specimens during the WOI from patients with RIF and women who conceived after one IVF/ICSI attempt. We conducted mRNA microarray on the samples followed by relevant comparative and functional analysis. Microarray analysis revealed 357 dysregulated mRNAs between the two groups...
May 19, 2017: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/28523979/pacap-promotes-matrix-driven-adhesion-of-cultured-adult-murine-neural-progenitors
#7
James A Waschek, Joseph R Cohen, Gloria C Chi, Tomasz J Proszynski, Pawel Niewiadomski
New neurons are born throughout the life of mammals in germinal zones of the brain known as neurogenic niches: the subventricular zone of the lateral ventricles and the subgranular zone of the dentate gyrus of the hippocampus. These niches contain a subpopulation of cells known as adult neural progenitor cells (aNPCs), which self-renew and give rise to new neurons and glia. aNPCs are regulated by many factors present in the niche, including the extracellular matrix (ECM). We show that the neuropeptide PACAP (pituitary adenylate cyclase-activating polypeptide) affects subventricular zone-derived aNPCs by increasing their surface adhesion...
May 2017: ASN Neuro
https://www.readbyqxmd.com/read/28522885/dynamically-tunable-cell-culture-platforms-for-tissue-engineering-and-mechanobiology
#8
Koichiro Uto, Jonathan H Tsui, Cole A DeForest, Deok-Ho Kim
Human tissues are sophisticated ensembles of many distinct cell types embedded in the complex, but well-defined, structures of the extracellular matrix (ECM). Dynamic biochemical, physicochemical, and mechano-structural changes in the ECM define and regulate tissue-specific cell behaviors. To recapitulate this complex environment in vitro, dynamic polymer-based biomaterials have emerged as powerful tools to probe and direct active changes in cell function. The rapid evolution of polymerization chemistries, structural modulation, and processing technologies, as well as the incorporation of stimuli-responsiveness, now permit synthetic microenvironments to capture much of the dynamic complexity of native tissue...
February 2017: Progress in Polymer Science
https://www.readbyqxmd.com/read/28522569/brain-derived-neurotrophic-factor-and-airway-fibrosis-in-asthma
#9
Michelle R Freeman, Venkatachalem Sathish, Logan J Manlove, Shengyu Wang, Rodney D Britt, Michael A Thompson, Christina M Pabelick, Y S Prakash
Airway remodeling in asthma driven by inflammation involves proliferation of epithelial cells and airway smooth muscle (ASM), as well as enhanced extracellular matrix (ECM) generation and deposition, i.e. fibrosis. Accordingly, understanding pro-fibrotic mechanisms is important for developing novel therapeutic strategies in asthma. Recent studies, including our own, have suggested a role for locally-produced growth factors such as brain-derived neurotrophic factor (BDNF) in mediating and modulating inflammation effects...
May 18, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28521114/msc-ecm-cellular-complexes-induce-periodontal-tissue-regeneration
#10
M Takewaki, M Kajiya, K Takeda, S Sasaki, S Motoike, N Komatsu, S Matsuda, K Ouhara, N Mizuno, T Fujita, H Kurihara
Transplantation of mesenchymal stem cells (MSCs), which possess self-renewing properties and multipotency, into a periodontal defect is thought to be a useful option for periodontal tissue regeneration. However, developing more reliable and predictable implantation techniques is still needed. Recently, we generated clumps of an MSC/extracellular matrix (ECM) complex (C-MSC), which consisted of cells and self-produced ECM. C-MSCs can regulate their cellular functions in vitro and can be grafted into a defect site, without any artificial scaffold, to induce bone regeneration...
May 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28520806/als-skeletal-muscle-shows-enhanced-tgf-%C3%AE-signaling-fibrosis-and-induction-of-fibro-adipogenic-progenitor-markers
#11
David Gonzalez, Osvaldo Contreras, Daniela L Rebolledo, Juan Pablo Espinoza, Brigitte van Zundert, Enrique Brandan
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease in which upper and lower motoneurons degenerate leading to muscle wasting, paralysis and eventually death from respiratory failure. Several studies indicate that skeletal muscle contributes to disease progression; however the molecular mechanisms remain elusive. Fibrosis is a common feature in skeletal muscle under chronic damage conditions such as those caused by muscular dystrophies or denervation. However, the exact mechanisms of fibrosis induction and the cellular bases of this pathological response are unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28520505/early-blockade-of-matrix-metalloproteinases-in-spinal-cord-injured-dogs-results-in-a-long-term-increase-in-bladder-compliance
#12
Jonathan Michael Levine, Noah D Cohen, Thomas Fandel, Gwendolyn Joan Levine, Joseph M Mankin, John F Griffin, Sharon C Kerwin, C Elizabeth Boudreau, Alpa Trivedi, Linda Noble-Haeusslein
Spinal cord injury (SCI) is often accompanied by reduced bladder compliance, which contributes to adverse conditions including urinary tract infections and vesicoureteral reflux. Reduced compliance is, in part, attributed to extensive remodeling of the bladder wall including the extracellular matrix (ECM). Here we tested the hypothesis that blockade of matrix metalloproteinases (MMPs), known for their ability to remodel the ECM, improves bladder compliance in dogs with SCI. We first evaluated dogs with naturally occurring SCIs resulting from intervertebral disc herniation (IVDH)...
May 18, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28518125/glycoproteomics-of-the-extracellular-matrix-a-method-for-intact-glycopeptide-analysis-using-mass-spectrometry
#13
Javier Barallobre-Barreiro, Ferheen Baig, Marika Fava, Xiaoke Yin, Manuel Mayr
Fibrosis is a hallmark of many cardiovascular diseases and is associated with the exacerbated secretion and deposition of the extracellular matrix (ECM). Using proteomics, we have previously identified more than 150 ECM and ECM-associated proteins in cardiovascular tissues. Notably, many ECM proteins are glycosylated. This post-translational modification affects protein folding, solubility, binding, and degradation. We have developed a sequential extraction and enrichment method for ECM proteins that is compatible with the subsequent liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis of intact glycopeptides...
April 21, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28515079/impact-of-acetaminophen-consumption-and-resistance-exercise-on-extracellular-matrix-gene-expression-in-human-skeletal-muscle
#14
Shivam H Patel, Andrew C D'Lugos, Erica R Eldon, Donald Curtis, Jared M Dickinson, Chad C Carroll
Acetaminophen (APAP) given during chronic exercise reduces skeletal muscle collagen and cross-linking in rats. We propose that the effect of APAP on muscle ECM may, in part, be mediated by dysregulation of the balance between matrix metalloproteinases (MMPs) and tissue inhibitors of MMPs (TIMPs). The purpose of this study was to evaluate the impact of APAP consumption during acute resistance exercise (RE) on several regulators of the ECM in human skeletal muscle. In a double-blinded, placebo-controlled, randomized cross-over design, recreationally active men (n=8, 25±2yr) performed two trials of knee extension...
May 17, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28513656/restoring-the-biophysical-properties-of-decellularized-patches-through-recellularization
#15
Gigi Chi Ting Au-Yeung, Udi Sarig, Hadar Sarig, Hanumakumar Bogireddi, Tomer Bronshtein, Limor Baruch, Avihai Spizzichino, Jacob Bortman, Boey Yin Chiang Freddy, Marcelle Machluf, Subbu S Venkatraman
Various extracellular matrix (ECM) scaffolds, isolated through decellularization, were suggested as ideal biomimetic materials for 'Functional tissue engineering' (FTE). The decellularization process comprises a compromise between damaging and preserving the ultrastructure and composition of ECM-previously shown to affect cell survival, proliferation, migration, organization, differentiation and maturation. Inversely, the effects of cells on the ECM constructs' biophysical properties, under physiological-like conditions, remain still largely unknown...
May 17, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28513598/yap-taz-link-cell-mechanics-to-notch-signalling-to-control-epidermal-stem-cell-fate
#16
Antonio Totaro, Martina Castellan, Giusy Battilana, Francesca Zanconato, Luca Azzolin, Stefano Giulitti, Michelangelo Cordenonsi, Stefano Piccolo
How the behaviour of somatic stem cells (SCs) is influenced by mechanical signals remains a black-box in cell biology. Here we show that YAP/TAZ regulation by cell shape and rigidity of the extracellular matrix (ECM) dictates a pivotal SC decision: to remain undifferentiated and grow, or to activate a terminal differentiation programme. Notably, mechano-activation of YAP/TAZ promotes epidermal stemness by inhibition of Notch signalling, a key factor for epidermal differentiation. Conversely, YAP/TAZ inhibition by low mechanical forces induces Notch signalling and loss of SC traits...
May 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28512922/effect-of-chemical-immobilization-of-sdf-1%C3%AE-into-muscle-derived-scaffolds-on-angiogenesis-and-muscle-progenitor-recruitment
#17
Sareh Rajabi-Zeleti, Sasan Jalili-Firoozinezhad, Mohammad Kazemi Ashtiani, Gilles Le Carrou, Shahragim Tajbakhsh, Hossein Baharvand
The availability of three-dimensional bioactive scaffolds with enhanced angiogenic capacity that have the capability to recruit tissue specific resident progenitors is of great importance for the regeneration of impaired skeletal muscle. Here we have investigated whether introduction of chemoattractant factors to tissue specific extracellular matrix (ECM) promotes cellular behavior in vitro as well as muscle progenitor recruitment and vascularization in vivo. We developed an interconnective macroporous sponge from decellularized skeletal muscle with maintained biochemical traits of the intact muscle...
May 16, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28512860/intrinsic-cellular-and-molecular-properties-of-in-vivo-hippocampal-synaptic-plasticity-are-altered-in-the-absence-of-key-synaptic-matrix-molecules
#18
Stephan Jansen, Christine Gottschling, Andreas Faissner, Denise Manahan-Vaughan
Hippocampal synaptic plasticity comprises a key cellular mechanism for information storage. In the hippocampus, both long-term potentiation (LTP) and long-term depression (LTD) are triggered by synaptic Ca(2+) -elevations that are typically mediated by the opening of voltage-gated cation channels, such as N-methyl-D-aspartate receptors (NMDAR), in the postsynaptic density. The integrity of the post-synaptic density is ensured by the extracellular matrix (ECM). Here, we explored whether synaptic plasticity is affected in adult behaving mice that lack the ECM proteins brevican, neurocan, tenascin-C and tenascin-R (TG)...
May 17, 2017: Hippocampus
https://www.readbyqxmd.com/read/28512473/vitamin-c-in-stem-cell-biology-impact-on-extracellular-matrix-homeostasis-and-epigenetics
#19
REVIEW
Cristina D'Aniello, Federica Cermola, Eduardo Jorge Patriarca, Gabriella Minchiotti
Transcription factors and signaling molecules are well-known regulators of stem cell identity and behavior; however, increasing evidence indicates that environmental cues contribute to this complex network of stimuli, acting as crucial determinants of stem cell fate. l-Ascorbic acid (vitamin C (VitC)) has gained growing interest for its multiple functions and mechanisms of action, contributing to the homeostasis of normal tissues and organs as well as to tissue regeneration. Here, we review the main functions of VitC and its effects on stem cells, focusing on its activity as cofactor of Fe(+2)/αKG dioxygenases, which regulate the epigenetic signatures, the redox status, and the extracellular matrix (ECM) composition, depending on the enzymes' subcellular localization...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28509612/defining-the-phylogenetic-position-of-amanita-species-from-andean-colombia
#20
Natalia Vargas, Carlos José Pardo-de La Hoz, Giovanna Danies, Ana Esperanza Franco-Molano, Pedro Jiménez, Silvia Restrepo, Alejandro Grajales
Amanita is a worldwide-distributed fungal genus, with approximately 600 known species. Most species within the genus are ectomycorrhizal (ECM), with some saprotrophic representatives. In this study, we constructed the first comprehensive phylogeny including ECM species from Colombia collected in native Quercus humboldtii forests and in introduced Pinus patula plantations. We included 8 species (A. brunneolocularis, A. colombiana, A. flavoconia, A. fuligineodisca, A. muscaria, A. rubescens, A. sororcula, and A...
April 12, 2017: Mycologia
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