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BMC Cell Biology

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https://www.readbyqxmd.com/read/29216821/molecular-targets-and-signaling-pathways-regulated-by-nuclear-translocation-of-syndecan-1
#1
Tünde Szatmári, Filip Mundt, Ashish Kumar-Singh, Lena Möbus, Rita Ötvös, Anders Hjerpe, Katalin Dobra
BACKGROUND: The cell-surface heparan sulfate proteoglycan syndecan-1 is important for tumor cell proliferation, migration, and cell cycle regulation in a broad spectrum of malignancies. Syndecan-1, however, also translocates to the cell nucleus, where it might regulate various molecular functions. RESULTS: We used a fibrosarcoma model to dissect the functions of syndecan-1 related to the nucleus and separate them from functions related to the cell-surface. Nuclear translocation of syndecan-1 hampered the proliferation of fibrosarcoma cells compared to the mutant lacking nuclear localization signal...
December 8, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/29141582/a-novel-interaction-between-kinase-activities-in-regulation-of-cilia-formation
#2
Nicole DeVaul, Katerina Koloustroubis, Rong Wang, Ann O Sperry
BACKGROUND: The primary cilium is an extension of the cell membrane that encloses a microtubule-based axoneme. Primary cilia are essential for transmission of environmental cues that determine cell fate. Disruption of primary cilia function is the molecular basis of numerous developmental disorders. Despite their biological importance, the mechanisms governing their assembly and disassembly are just beginning to be understood. Cilia growth and disassembly are essential events when cells exit and reenter into the cell cycle...
November 15, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/29137597/reduction-of-pluripotent-gene-expression-in-murine-embryonic-stem-cells-exposed-to-mechanical-loading-or-cyclo-rgd-peptide
#3
Olesja Hazenbiller, Neil A Duncan, Roman J Krawetz
BACKGROUND: Self-renewal and differentiation of embryonic stem cells (ESCs) is directed by biological and/or physical cues that regulate multiple signaling cascades. We have previously shown that mESCs seeded in a type I collagen matrix demonstrate a loss of pluripotent marker expression and differentiate towards an osteogenic lineage. In this study, we examined if this effect was mediated in part through Arginylglycylaspartic acid (RGD) dependent integrin activity and/or mechano-transduction...
November 14, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/29041897/small-molecule-modulation-of-splicing-factor-expression-is-associated-with-rescue-from-cellular-senescence
#4
Eva Latorre, Vishal C Birar, Angela N Sheerin, J Charles C Jeynes, Amy Hooper, Helen R Dawe, David Melzer, Lynne S Cox, Richard G A Faragher, Elizabeth L Ostler, Lorna W Harries
BACKGROUND: Altered expression of mRNA splicing factors occurs with ageing in vivo and is thought to be an ageing mechanism. The accumulation of senescent cells also occurs in vivo with advancing age and causes much degenerative age-related pathology. However, the relationship between these two processes is opaque. Accordingly we developed a novel panel of small molecules based on resveratrol, previously suggested to alter mRNA splicing, to determine whether altered splicing factor expression had potential to influence features of replicative senescence...
October 17, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28851291/honokiol-improved-chondrogenesis-and-suppressed-inflammation-in-human-umbilical-cord-derived-mesenchymal-stem-cells-via-blocking-nuclear-factor-%C3%AE%C2%BAb-pathway
#5
Hao Wu, Zhanhai Yin, Ling Wang, Feng Li, Yusheng Qiu
BACKGROUND: Cartilage degradation is the significant pathological process in osteoarthritis (OA). Inflammatory cytokines, such as interleukin-1β (IL-1β), activate various downstream mediators contributing to OA pathology. Recently, stem cell-based cartilage repair emerges as a potential therapeutic strategy that being widely studied, whereas, the outcome is still far from clinical application. In this study, we focused on an anti-inflammatory agent, honokiol, which is isolated from an herb, investigated the potential effects on human umbilical cord derived mesenchymal stem cells (hUC-MSCs) in IL-1β stimulation...
August 29, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28851289/coral-cell-separation-and-isolation-by-fluorescence-activated-cell-sorting-facs
#6
Benyamin Rosental, Zhanna Kozhekbaeva, Nathaniel Fernhoff, Jonathan M Tsai, Nikki Traylor-Knowles
BACKGROUND: Generalized methods for understanding the cell biology of non-model species are quite rare, yet very much needed. In order to address this issue, we have modified a technique traditionally used in the biomedical field for ecological and evolutionary research. Fluorescent activated cell sorting (FACS) is often used for sorting and identifying cell populations. In this study, we developed a method to identify and isolate different cell populations in corals and other cnidarians...
August 29, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28851287/epha-receptors-and-ephrin-a-ligands-are-upregulated-by-monocytic-differentiation-maturation-and-promote-cell-adhesion-and-protrusion-formation-in-hl60-monocytes
#7
Midori Mukai, Norihiko Suruga, Noritaka Saeki, Kazushige Ogawa
BACKGROUND: Eph signaling is known to induce contrasting cell behaviors such as promoting and inhibiting cell adhesion/spreading by altering F-actin organization and influencing integrin activities. We have previously demonstrated that EphA2 stimulation by ephrin-A1 promotes cell adhesion through interaction with integrins and integrin ligands in two monocyte/macrophage cell lines. Although mature mononuclear leukocytes express several members of the EphA/ephrin-A subclass, their expression has not been examined in monocytes undergoing during differentiation and maturation...
August 29, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28778152/erratum-to-cladosporol-a-triggers-apoptosis-sensitivity-by-ros-mediated-autophagic-flux-in-human-breast-cancer-cells
#8
Mytre Koul, Ashok Kumar, Ramesh Deshidi, Vishal Sharma, Rachna D Singh, Jasvinder Singh, Parduman Raj Sharma, Bhahwal Ali Shah, Sundeep Jaglan, Shashank Singh
No abstract text is available yet for this article.
August 4, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28728544/cladosporol-a-triggers-apoptosis-sensitivity-by-ros-mediated-autophagic-flux-in-human-breast-cancer-cells
#9
Mytre Koul, Ashok Kumar, Ramesh Deshidi, Vishal Sharma, Rachna D Singh, Jasvinder Singh, Parduman Raj Sharma, Bhahwal Ali Shah, Sundeep Jaglan, Shashank Singh
BACKGROUND: Endophytes have proven to be an invaluable resource of chemically diverse secondary metabolites that act as excellent lead compounds for anticancer drug discovery. Here we report the promising cytotoxic effects of Cladosporol A (HPLC purified >98%) isolated from endophytic fungus Cladosporium cladosporioides collected from Datura innoxia. Cladosporol A was subjected to in vitro cytotoxicity assay against NCI60 panel of human cancer cells using MTT assay. We further investigated the molecular mechanism(s) of Cladosporol A induced cell death in human breast (MCF-7) cancer cells...
July 20, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28705199/the-m-phase-specific-hyperphosphorylation-of-staufen2-involved-the-cyclin-dependent-kinase-cdk1
#10
Rémy Beaujois, Elizabeth Ottoni, Xin Zhang, Christina Gagnon, Sami HSine, Stéphanie Mollet, Wildriss Viranaicken, Luc DesGroseillers
BACKGROUND: Staufen2 (STAU2) is an RNA-binding protein involved in the post-transcriptional regulation of gene expression. This protein was shown to be required for organ formation and cell differentiation. Although STAU2 functions have been reported in neuronal cells, its role in dividing cells remains deeply uncharacterized. Especially, its regulation during the cell cycle is completely unknown. RESULTS: In this study, we showed that STAU2 isoforms display a mitosis-specific slow migration pattern on SDS-gels in all tested transformed and untransformed cell lines...
July 14, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28549413/external-magnetic-field-promotes-homing-of-magnetized-stem-cells-following-subcutaneous-injection
#11
Yu Meng, Changzhen Shi, Bo Hu, Jian Gong, Xing Zhong, Xueyin Lin, Xinju Zhang, Jun Liu, Cong Liu, Hao Xu
BACKGROUND: Mesenchymal stem cells (MSCs) are multipotent stromal cells that have the ability to self-renew and migrate to sites of pathology. In vivo tracking of MSCs provides insights into both, the underlying mechanisms of MSC transformation and their potential as gene delivery vehicles. The aim of our study was to assess the ability of superparamagnetic iron oxide nanoparticles (SPIONs)-labeled Wharton's Jelly of the human umbilical cord-derived MSCs (WJ-MSCs) to carry the green fluorescent protein (GFP) gene to cutaneous injury sites in a murine model...
May 26, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28545392/adenylyl-cyclase-mrna-localizes-to-the-posterior-of-polarized-dictyostelium-cells-during-chemotaxis
#12
Satarupa Das, Joshua M Parker, Can Guven, Weiye Wang, Paul W Kriebel, Wolfgang Losert, Daniel R Larson, Carole A Parent
BACKGROUND: In Dictyostelium discoideum, vesicular transport of the adenylyl cyclase A (ACA) to the posterior of polarized cells is essential to relay exogenous 3',5'-cyclic adenosine monophosphate (cAMP) signals during chemotaxis and for the collective migration of cells in head-to-tail arrangements called streams. RESULTS: Using fluorescence in situ hybridization (FISH), we discovered that the ACA mRNA is asymmetrically distributed at the posterior of polarized cells...
May 25, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28486929/ulk1-phosphorylates-sec23a-and-mediates-autophagy-induced-inhibition-of-er-to-golgi-traffic
#13
Wenjia Gan, Caiyun Zhang, Ka Yu Siu, Ayano Satoh, Julian A Tanner, Sidney Yu
BACKGROUND: Autophagy is an inducible autodigestive process that allows cells to recycle proteins and other materials for survival during stress and nutrient deprived conditions. The kinase ULK1 is required to activate this process. ULK1 phosphorylates a number of target proteins and regulates many cellular processes including the early secretory pathway. Recently, ULK1 has been demonstrated to phosphorylate Sec16 and affects the transport of serotonin transporter at the ER exit sites (ERES), but whether ULK1 may affect the transport of other cargo proteins and general secretion has not been fully addressed...
May 10, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28427322/dental-pulp-pluripotent-like-stem-cells-dppsc-a-new-stem-cell-population-with-chromosomal-stability-and-osteogenic-capacity-for-biomaterials-evaluation
#14
Raquel Núñez-Toldrà, Ester Martínez-Sarrà, Carlos Gil-Recio, Miguel Ángel Carrasco, Ashraf Al Madhoun, Sheyla Montori, Maher Atari
BACKGROUND: Biomaterials are widely used to regenerate or substitute bone tissue. In order to evaluate their potential use for clinical applications, these need to be tested and evaluated in vitro with cell culture models. Frequently, immortalized osteoblastic cell lines are used in these studies. However, their uncontrolled proliferation rate, phenotypic changes or aberrations in mitotic processes limits their use in long-term investigations. Recently, we described a new pluripotent-like subpopulation of dental pulp stem cells derived from the third molars (DPPSC) that shows genetic stability and shares some pluripotent characteristics with embryonic stem cells...
April 21, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28427343/loss-of-pericyte-smoothened-activity-in-mice-with-genetic-deficiency-of-leptin
#15
Guanhua Xie, Marzena Swiderska-Syn, Mark L Jewell, Mariana Verdelho Machado, Gregory A Michelotti, Richard T Premont, Anna Mae Diehl
BACKGROUND: Obesity is associated with multiple diseases, but it is unclear how obesity promotes progressive tissue damage. Recovery from injury requires repair, an energy-expensive process that is coupled to energy availability at the cellular level. The satiety factor, leptin, is a key component of the sensor that matches cellular energy utilization to available energy supplies. Leptin deficiency signals energy depletion, whereas activating the Hedgehog pathway drives energy-consuming activities...
April 20, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28427342/intermittent-parathyroid-hormone-pth-promotes-cementogenesis-and-alleviates-the-catabolic-effects-of-mechanical-strain-in-cementoblasts
#16
Yuyu Li, Zhiai Hu, Chenchen Zhou, Yang Xu, Li Huang, Xin Wang, Shujuan Zou
BACKGROUND: External root resorption, commonly starting from cementum, is a severe side effect of orthodontic treatment. In this pathological process and repairing course followed, cementoblasts play a significant role. Previous studies implicated that parathyroid hormone (PTH) could act on committed osteoblast precursors to promote differentiation, and inhibit apoptosis. But little was known about the role of PTH in cementoblasts. The purpose of this study was to investigate the effects of intermittent PTH on cementoblasts and its influence after mechanical strain treatment...
April 20, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28424053/stress-induced-nuclear-granules-form-in-response-to-accumulation-of-misfolded-proteins-in-caenorhabditis-elegans
#17
Katherine M Sampuda, Mason Riley, Lynn Boyd
BACKGROUND: Environmental stress can affect the viability or fecundity of an organism. Environmental stressors may affect the genome or the proteome and can cause cellular distress by contributing to protein damage or misfolding. This study examines the cellular response to environmental stress in the germline of the nematode, C. elegans. RESULTS: Salt stress, oxidative stress, and starvation, but not heat shock, induce the relocalization of ubiquitin, proteasome, and the TIAR-2 protein into distinct subnuclear regions referred to as stress induced nuclear granules (SINGs)...
April 19, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28415963/impact-of-the-mdm2-splice-variants-mdm2-a-mdm2-b-and-mdm2-c-on-cytotoxic-stress-response-in-breast-cancer-cells
#18
Johanna Huun, Liv B Gansmo, Bård Mannsåker, Gjertrud Titlestad Iversen, Jan Inge Øvrebø, Per E Lønning, Stian Knappskog
BACKGROUND: The murine double minute 2 (MDM2) is an oncogene and a negative regulator of the tumor suppressor protein p53. MDM2 is known to be amplified in numerous human cancers, and upregulation of MDM2 is considered to be an alternative mechanism of p53 inactivation. The presence of many splice variants of MDM2 has been observed in both normal tissues and malignant cells; however their impact and functional properties in response to chemotherapy treatment are not fully understood. Here, we investigate the biological effects of three widely expressed alternatively spliced variants of MDM2; MDM2-A, MDM2-B and MDM2-C, both in unstressed MCF-7 breast cancer cells and in cells subjected to chemotherapy...
April 17, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28335714/testis-specific-atp-synthase-peripheral-stalk-subunits-required-for-tissue-specific-mitochondrial-morphogenesis-in-drosophila
#19
Eric M Sawyer, Elizabeth C Brunner, Yihharn Hwang, Lauren E Ivey, Olivia Brown, Megan Bannon, Dennis Akrobetu, Kelsey E Sheaffer, Oshauna Morgan, Conroy O Field, Nishita Suresh, M Grace Gordon, E Taylor Gunnell, Lindsay A Regruto, Cricket G Wood, Margaret T Fuller, Karen G Hales
BACKGROUND: In Drosophila early post-meiotic spermatids, mitochondria undergo dramatic shaping into the Nebenkern, a spherical body with complex internal structure that contains two interwrapped giant mitochondrial derivatives. The purpose of this study was to elucidate genetic and molecular mechanisms underlying the shaping of this structure. RESULTS: The knotted onions (knon) gene encodes an unconventionally large testis-specific paralog of ATP synthase subunit d and is required for internal structure of the Nebenkern as well as its subsequent disassembly and elongation...
March 23, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28245809/mesenchymal-stem-cells-and-myoblast-differentiation-under-hgf-and-igf-1-stimulation-for-3d-skeletal-muscle-tissue-engineering
#20
R Witt, A Weigand, A M Boos, A Cai, D Dippold, A R Boccaccini, D W Schubert, M Hardt, C Lange, A Arkudas, R E Horch, J P Beier
BACKGROUND: Volumetric muscle loss caused by trauma or after tumour surgery exceeds the natural regeneration capacity of skeletal muscle. Hence, the future goal of tissue engineering (TE) is the replacement and repair of lost muscle tissue by newly generating skeletal muscle combining different cell sources, such as myoblasts and mesenchymal stem cells (MSCs), within a three-dimensional matrix. Latest research showed that seeding skeletal muscle cells on aligned constructs enhance the formation of myotubes as well as cell alignment and may provide a further step towards the clinical application of engineered skeletal muscle...
February 28, 2017: BMC Cell Biology
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