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https://www.readbyqxmd.com/read/28821957/co-culture-of-chondrons-and-mesenchymal-stromal-cells-reduces-the-loss-of-collagen-vi-and-improves-extracellular-matrix-production
#1
H A Owida, T De Las Heras Ruiz, A Dhillon, Y Yang, N J Kuiper
Adult articular chondrocytes are surrounded by a pericellular matrix (PCM) to form a chondron. The PCM is rich in hyaluronan, proteoglycans, and collagen II, and it is the exclusive location of collagen VI in articular cartilage. Collagen VI anchors the chondrocyte to the PCM. It has been suggested that co-culture of chondrons with mesenchymal stromal cells (MSCs) might enhance extracellular matrix (ECM) production. This co-culture study investigates whether MSCs help to preserve the PCM and increase ECM production...
August 19, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28821675/synergistic-toxicity-of-polyglutamine-expanded-tbp-in-glia-and-neuronal-cells-therapeutic-implications-for-sca17
#2
Yang Yang, Su Yang, Jifeng Guo, Yiting Cui, Baisha Tang, Xiao-Jiang Li, Shihua Li
Spinocerebellar ataxia 17 (SCA17) is caused by polyglutamine (polyQ) repeat expansion in the TATA-binding protein (TBP) and is among a family of neurodegenerative diseases in which polyQ expansion leads to preferential neuronal loss in the brain. Although previous studies have demonstrated that expression of polyQ-expanded proteins in glial cells can cause neuronal injury via non-cell-autonomous mechanisms, these studies investigated animal models that overexpress transgenic mutant proteins. Since glial cells are particularly reactive to overexpressed mutant proteins, it is important to investigate the in vivo role of glial dysfunction in neurodegeneration when mutant polyQ proteins are endogenously expressed...
August 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821665/molecular-and-functional-properties-of-regional-astrocytes-in-the-adult-brain
#3
Lydie Morel, Ming Sum R Chiang, Haruki Higashimori, Temitope Shoneye, Lakshmanan K Iyer, Julia Yelick, Albert Tai, Yongjie Yang
The molecular signature and functional properties of astroglial subtypes in the adult central nervous system (CNS) remain largely undefined. By employing translational ribosome affinity purification (TRAP) followed by RNA-seq, we profiled astroglial ribosome-associated (presumably translating) mRNAs in major cortical and subcortical brain regions (cortex, hippocampus, caudate putamen, nucleus accumbens, thalamus, and hypothalamus) of BAC aldh1l1-TRAP mice (both sexes). We found that the expression of astroglial translating mRNAs closely follows the dorsoventral axis especially from cortex/hippocampus to thalamus/hypothalamus posteriorly...
August 7, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821574/mosaic-loss-of-non-muscle-myosin-iia-and-iib-is-sufficient-to-induce-mammary-epithelial-proliferation
#4
Kim-Vy Nguyen-Ngoc, Vanesa L Silvestri, Dan Georgess, Amanda N Fairchild, Andrew J Ewald
The mammary epithelium elaborates through hormonally-regulated changes in proliferation, migration, and differentiation. Non-muscle myosin II (NMII) functions at the interface between contractility, adhesion, and signal transduction. It was therefore a plausible regulator of mammary morphogenesis. We tested the genetic requirement for NMIIA and NMIIB through deletion of the myosin heavy chains (NMHC) that confer specificity to the complex. Surprisingly, mosaic loss, but not ubiquitous loss, of NMHCIIA and IIB induced high levels of proliferation in 3D culture...
August 18, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28821460/long-term-effects-of-hydrogen-sulfide-on-the-anabolic-catabolic-balance-of-articular-cartilage-in-vitro
#5
A Vela-Anero, T Hermida-Gomez, L Gato-Calvo, C Vaamonde-García, S Diaz-Prado, R Meijide-Faílde, F J Blanco, E F Burguera
Healthy cartilage maintenance relies on an equilibrium among the anabolic and catabolic processes in chondrocytes. With the onset of osteoarthritis (OA), increased interleukin (IL)-1β levels induce an inhibition of the synthesis of extracellular matrix (ECM) proteins, as well as an increase in proteases. This eventually leads to a predominance of the catabolic phenotype and the progressive loss of articular cartilage. Hydrogen sulfide (H2S) is a small gaseous molecule recognized as the third endogenous gasotransmitter...
August 15, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28820578/integrated-microfluidic-platform-with-multiple-functions-to-probe-the-tumor-endothelial-cell-interaction
#6
Ling Lin, Xuexia Lin, Luyao Lin, Qiang Feng, Takehiko Kitamori, Jin-Ming Lin, Jiashu Sun
Interaction between tumor and endothelial cells could affect tumor growth and progression, and induce drug resistance during cancer therapy. Investigation on tumor-endothelial cell interaction involves cell co-culture, protein detection, and analysis of drug metabolites, which are complicated and time-consuming. In this work, we present an integrated microfluidic device with three individual components (the cell co-culture component, the protein detection component, and the pre-treatment component for drug metabolites) to probe the interaction between tumor and endothelial cells...
August 18, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28820142/nanomelatonin-triggers-superior-anticancer-functionality-in-a-human-malignant-glioblastoma-cell-line
#7
Sanjeev Kumar Yadav, Anup Kumar Srivastava, Atul Dev, Babita Kaundal, Subhasree Roy Choudhury, Surajit Karmakar
Melatonin (MEL) has promising medicinal value as an anticancer agent in a variety of malignancies, but there are difficulties in achieving a therapeutic dose due to its short half-life, low bioavailability, poor solubility and extensive first-pass metabolism. In this study chitosan/tripolyphosphate (TPP) nanoparticles were prepared by an ionic gelation method to overcome the therapeutic challenges of melatonin and to improve its anticancer efficacy. Characterization of the melatonin-loaded chitosan (MEL-CS) nanoformulation was performed using transmission and scanning electron microscopies, dynamic light scattering, Fourier transform infrared spectroscopy, Raman spectroscopy and x-ray diffraction...
August 18, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28820065/bcg-increased-membrane-expression-of-trim59-through-the-tlr2-tlr4-irf5-pathway-in-raw264-7-macrophages
#8
Jin Zheng, Tian Yuan, Yan Dongmei, Li Dong, Zhu Xun
OBJECTIVE: In our previous study, we showed that Bacillus Calmette-Guerin (BCG)-activated macrophages have the ability to directly kill tumor cells. One of the main properties of these macrophages is the high expression of tripartite motif family protein 59 (TRIM59). This study was conducted to investigate the mechanism of BCG-induced TRIM59 expression on macrophages and to identify the subcellular localization of TRIM59. METHODS: TRIM59 expression and TNF-α secretion were compared in RAW264...
August 18, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28819779/curcuma-wenyujin-y-h-chen-et-c-ling-n-butyl-alcohol-extract-inhibits-ags-cell-helicobacter-pylori-caga-vaca-promoted-invasiveness-by-down-regulating-caudal-type-homeobox-transcription-factor-and-claudin-2-expression
#9
Hai-Feng Jin, Jin-Feng Dai, Li-Na Meng, Bin Lu
OBJECTIVE: To investigate the effects and possible mechanisms of action of Curcuma wenyujin Y. H. Chen et C. Ling n-Butyl alcohol extract (CWNAE) on repression of human gastric cancer (GC) AGS cell invasion induced by co-culturing with Helicobacter pylori (HP). METHODS: AGS cells were cultured with HP of positive or negative cytotoxin-associated gene A (CagA) and vacuolating cytotoxin gene A (VacA) expression (CagA+/- or VacA+/-) and divided into 5 group. Group A was cultured without HP as a control, Group B with HPCagA+VacA+, Group C with HPCagA-VacA-, Group D with HPCagA+VacA+ and CWNAE, and Group E with HPCagA-VacA- and CWNAE...
August 17, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28819459/exosomes-derived-from-natural-killer-cells-exert-therapeutic-effect-in-melanoma
#10
Liya Zhu, Senthilkumar Kalimuthu, Prakash Gangadaran, Ji Min Oh, Ho Won Lee, Se Hwan Baek, Shin Young Jeong, Sang-Woo Lee, Jaetae Lee, Byeong-Cheol Ahn
Objective: Exosomes are nanovesicles that are released from normal and tumor cells and are detectable in cell culture supernatant and human biological fluids. Although previous studies have explored exosomes released from cancer cells, little is understood regarding the functions of exosomes released by normal cells. Natural killer (NK) cells display rapid immunity to metastatic or hematological malignancies, and efforts have been undertaken to clinically exploit the antitumor properties of NK cells. However, the characteristics and functions of exosomes derived from NK cells remain unknown...
2017: Theranostics
https://www.readbyqxmd.com/read/28819414/depletion-of-ctcf-in-breast-cancer-cells-selectively-induces-cancer-cell-death-via-p53
#11
Ji-Yeon Lee, Muhammad Mustafa, Clara Yuri Kim, Myoung Hee Kim
CCCTC-binding factor (CTCF), a ubiquitous 11-zinc finger multifunctional protein, has distinct molecular functions, such as transcriptional activation, repression, and chromatin barrier activity, in a locus-specific manner. Elevated CTCF levels in breast cancer cells are known to contribute to tumorigenesis; however, the underlying mechanism remains elusive. We investigated the effect of CTCF expression on breast cancer cell survival and elucidated its mechanism. CTCF depletion in MCF-7 cells led to a decreased cell growth and proliferation, surpassing the growth of normal cells under co-culture system of MCF-7-GFP and MCF10A...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819205/fast-wide-volume-functional-imaging-of-engineered-in-vitro-brain-tissues
#12
G Palazzolo, M Moroni, A Soloperto, G Aletti, G Naldi, M Vassalli, T Nieus, F Difato
The need for in vitro models that mimic the human brain to replace animal testing and allow high-throughput screening has driven scientists to develop new tools that reproduce tissue-like features on a chip. Three-dimensional (3D) in vitro cultures are emerging as an unmatched platform that preserves the complexity of cell-to-cell connections within a tissue, improves cell survival, and boosts neuronal differentiation. In this context, new and flexible imaging approaches are required to monitor the functional states of 3D networks...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819126/targeted-blockade-of-tgf-%C3%AE-and-il-6-jak2-stat3-pathways-inhibits-lung-cancer-growth-promoted-by-bone-marrow-derived-myofibroblasts
#13
Jindong Shi, Jingjing Feng, Juan Xie, Zhoufang Mei, Tianyun Shi, Shengmei Wang, Yong Du, Gong Yang, Yougen Wu, Xiaojiao Cheng, Shanqun Li, Liming Zhu, Chung S Yang, Shuiping Tu, Zhijun Jie
To investigate the role of TGF-β and IL-6 in myofibroblasts (MFs) - lung cancer cell interactions, lung cancer cells (Lewis and CTM-167 cell lines) were stimulated by IL-6, MF-conditioned medium (MF-CM) or MFs, with or without TGF-β signaling inhibitor - SB431542 and/or JAK2/STAT3 inhibitor - JSI-124. MFs were stimulated by TGF-β, cancer cell-CM or cancer cells, with or without SB431542 and JSI-124. Cell proliferation, the levels of cytokines, expression of mRNA and protein were determined. Mice bearing xenograft tumors were intraperitoneally treated with SB431542 or JSI-124 and monitored for up to 45 days...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819116/silencing-of-tgf-%C3%AE-1-in-tumor-cells-impacts-mmp-9-in-tumor-microenvironment
#14
Lakisha D Moore-Smith, Tatyana Isayeva, Joo Hyoung Lee, Andra Frost, Selvarangan Ponnazhagan
Transforming growth factor (TGF)-β1 contributes to autocrine and paracrine functions in the tumor microenvironment (TME). The present study examined the effects of TGF-β1 crosstalk in TME and its role in mediating tumor formation and progression by targeted abrogation of TGF-β1 expression in metastatic cells in situ. Using species-specific primers, we found a significant increase in MMP-9 gene expression in the tumor-reactive stroma during late-stage metastasis in the lung. This effect was also confirmed in cancer-associated fibroblasts (CAFs) when co-cultured with the tumor cells...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818455/adipose-derived-stromal-cells-enhance-auditory-neuron-survival-in-an-animal-model-of-sensory-hearing-loss
#15
Philipp Schendzielorz, Maike Vollmer, Kristen Rak, Armin Wiegner, Nashwa Nada, Katrin Radeloff, Rudolf Hagen, Andreas Radeloff
BACKGROUND: A cochlear implant (CI) is an electronic prosthesis that can partially restore speech perception capabilities. Optimum information transfer from the cochlea to the central auditory system requires a proper functioning auditory nerve (AN) that is electrically stimulated by the device. In deafness, the lack of neurotrophic support, normally provided by the sensory cells of the inner ear, however, leads to gradual degeneration of auditory neurons with undesirable consequences for CI performance...
August 14, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28814973/photoautotrophic-production-of-polyhydroxyalkanoates-in-a-synthetic-mixed-culture-of-synechococcus-elongatus-cscb-and-pseudomonas-putida-cscab
#16
Hannes Löwe, Karina Hobmeier, Manuel Moos, Andreas Kremling, Katharina Pflüger-Grau
BACKGROUND: One of the major challenges for the present and future generations is to find suitable substitutes for the fossil resources we rely on today. Cyanobacterial carbohydrates have been discussed as an emerging renewable feedstock in industrial biotechnology for the production of fuels and chemicals, showing promising production rates when compared to crop-based feedstock. However, intrinsic capacities of cyanobacteria to produce biotechnological compounds are limited and yields are low...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28814778/in-vivo-and-in-vitro-sex-differences-in-the-dendritic-morphology-of-developing-murine-hippocampal-and-cortical-neurons
#17
Kimberly P Keil, Sunjay Sethi, Machelle D Wilson, Hao Chen, Pamela J Lein
Altered dendritic morphology is common in neurodevelopmental disorders (NDDs), many of which show sex biases in prevalence, onset and/or severity. However, whether dendritic morphology varies as a function of sex in juvenile mice or primary neuronal cell cultures is largely unknown even though both are widely used models for studying NDDs. To address this gap, we quantified dendritic morphology in CA1 pyramidal hippocampal and adjacent somatosensory pyramidal cortical neurons from male and female postnatal day (P)28 C57BL/6J mice...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814755/membrane-fouling-induced-by-ahl-mediated-soluble-microbial-product-smp-formation-by-fouling-causing-bacteria-co-cultured-with-fouling-enhancing-bacteria
#18
So Ishizaki, Ryoichi Sugiyama, Satoshi Okabe
Membrane fouling still remains a major obstacle for wider applications of membrane bioreactor (MBR), which is mainly caused by soluble microbial products (SMP). Identification of key bacteria responsible for SMP production is essential for mitigation of membrane fouling. Here, we investigated the effect of microbial interaction on membrane fouling. We measured the membrane fouling potentials of 13 bacterial strains isolated from a pilot-scale MBR treating domestic wastewater when they were cultivated as single-culture and co-culture...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814453/sympathetic-signaling-reactivates-quiescent%C3%A2-disseminated-prostate-cancer-cells-in-the-bone-marrow
#19
Ann Decker, Younghun Jung, Frank C Cackowski, Kenji Yumoto, Jingcheng Wang, Russell S Taichman
Clinical observations have identified an association between psychological stress and cancer relapse; suggesting that the sympathetic nervous system/norepinephrine (NE) plays a role in reactivation of dormant disseminated tumor cells (DTCs) in the bone marrow niche. Here, the mechanism by which NE regulates prostate cancer (PCa) DTCs in the marrow is explored. NE directly stimulated PCa cell proliferation through β2-adrenergic receptors (ADRB2). NE also altered PCa proliferation in the marrow niche by indirectly by downregulating the secretion of the dormancy inducing molecule growth arrest specific-6 (GAS6) expressed by osteoblasts...
August 16, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28812769/multiplex-coaxial-flow-focusing-for-producing-multicompartment-janus-microcapsules-with-tunable-material-compositions-and-structural-characteristics
#20
Qiang Wu, Chaoyu Yang, Guangli Liu, Wanghuai Xu, Zhiqiang Zhu, Ting Si, Ronald X Xu
We propose a simple but efficient multiplex coaxial flow focusing (MCFF) process for single-step fabrication of multicompartment Janus microcapsules (MJMs) in a wide range of operating parameters. The produced MJMs consist of a multicompartmental core-shell structure with material compositions tunable in individual shell and core compartments. Potential applications of such a MJM agent are demonstrated in both benchtop and in vitro experiments. For the benchtop experiment, magnetic nanoparticles are loaded into one of the shell compartments and photopolymerized under ultraviolet light for controlled alignment and rotation of the microcapsules in a magnetic field...
August 16, 2017: Lab on a Chip
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