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https://www.readbyqxmd.com/read/28427186/microrna-494-promotes-apoptosis-and-extracellular-matrix-degradation-in-degenerative-human-nucleus-pulposus-cells
#1
Liang Kang, Cao Yang, Yu Song, Kangcheng Zhao, Wei Liu, Wenbin Hua, Kun Wang, Ji Tu, Shuai Li, Huipeng Yin, Yukun Zhang
PURPOSE: This study investigated the expression and function of the microRNA-494 in intervertebral disc degeneration (IDD). RESULTS: MicroRNA-494 expression was upregulated during IDD progression; its overexpression increased the expression of ECM catabolic factors such as matrix metalloproteinase and A disintegrin and metalloproteinase with thrombospondin motif in NP cells while decreasing that of anabolic genes such as type II collagen and aggrecan; it also induced the apoptosis of NP cells, as determined by flow cytometry...
March 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28425567/effect-of-ngf-from-venom-of-chinese-cobra-naja-atra-on-chondrocytes-proliferation-and-metabolism-in-vitro
#2
Jiachang Tan, Zhenhui Lu, Zhikang Miao, Danqing Lei, Li Zheng, Jinmin Zhao
Autologous chondrocyte implantation (ACI) is promising strategy for cartilage repair. However, chondrocyte phenotype is easily lost when expanded in vitro which defined as "dedifferentiation". To ensure successful therapy, an effective pro-chondrogenic agent is necessary to overcome the obstacle of limited cell numbers in the restoration process, and dedifferentiation is a prerequisite. In the present study, we investigated the chondro-protective effect of NGF from Chinese cobra venom on human chondrocytes by determination of its specific effect on cell viability, proliferation, morphology, GAG production and cartilage specific gene expression...
April 20, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28417917/minicircle-mediated-gene-delivery-to-canine-and-equine-mesenchymal-stem-cells
#3
Naomie Tidd, Jacob Michelsen, Bryan Hilbert, Jane C Quinn
Gene-directed tissue repair offers the clinician, human or veterinary, the chance to enhance cartilage regeneration and repair at a molecular level. Non-viral plasmid vectors have key biosafety advantages over viral vector systems for regenerative therapies due to their episomal integration however, conventional non-viral vectors can suffer from low transfection efficiency. Our objective was to identify and validate in vitro a novel non-viral gene expression vector that could be utilized for ex vivo and in vivo delivery to stromal-derived mesenchymal stem cells (MSCs)...
April 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28413480/analysis-of-the-mechanism-by-which-nerve-growth-factor-promotes-callus-formation-in-mice-with-tibial-fracture
#4
Xi-Guang Sang, Zhi-Yong Wang, Lin Cheng, Yan-Hong Liu, Yong-Gang Li, Tao Qin, Kai Di
The aim of the present study was to analyze the mechanism by which nerve growth factor (NGF) promotes callus formation in mice with tibial fracture. NGF transgenic homozygotic mice and NGF wild homozygotic mice were selected to construct non-stabilized fracture model of tibia. The mice were sacrificed on days 7, 14 and 21, respectively, and each group had a sample with 8 mice at each point in time. X-ray radiography and safranin fast green were used to observe fracture healing and in situ hybridization was used to examine the NGF mRNA expression of tibia at each phase of fracture healing...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28407375/h19-promotes-cholestatic-liver-fibrosis-by-preventing-zeb1-mediated-inhibition-of-epcam
#5
Yongfeng Song, Chune Liu, Xia Liu, Jocelyn Trottier, Michele Beaudoin, Li Zhang, Chad Pope, Guangyong Peng, Olivier Barbier, Xiaobo Zhong, Linheng Li, Li Wang
Based on our recent finding that disruption of bile acid (BA) homeostasis in mice results in the induction of hepatic lncRNA H19 expression, we sought to elucidate the role of H19 in cholestatic liver fibrosis. Hepatic overexpression of H19RNA augmented bile duct ligation (BDL)-induced liver fibrosis, which was accompanied by the elevation of serum ALT, AST, bilirubin, and BA levels. Multiple genes related to liver fibrosis, inflammation, and biliary hyperplasia were increased in H19-BDL vs Null-BDL mice, whereas genes in BA synthesis were decreased...
April 13, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28407304/a-tumor-suppressor-gene-product-platelet-derived-growth-factor-receptor-like-protein-controls-controls-chondrocyte-proliferation-and-differentiation
#6
Kazumi Kawata, Satoshi Kubota, Takanori Eguchi, Eriko Aoyama, Norifumi H Moritani, Morihiko Oka, Harumi Kawaki, Masaharu Takigawa
The platelet-derived growth factor receptor-like (PDGFRL) gene is regarded as a tumor suppressor gene. However, nothing is known about the molecular function of PDGFRL. In this study, we initially clarified its function in chondrocytes. Among all cell lines examined, the PDGFRL mRNA level was the highest in chondrocytic HCS-2/8 cells. Interestingly, the proliferation of chondrocytic HCS-2/8 cells was promoted by PDGFRL overexpression, whereas that of the breast cancer-derived MDA-231 cells was inhibited. Of note, in PDGFRL-overexpressing HCS-2/8 cells, the expression of chondrocyte differentiation marker genes, SOX9, ACAN, COL2A1, COL10A1 and ALP, was decreased...
April 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28406027/gelatin-derived-graphene-silicate-hybrid-materials-are-biocompatible-and-synergistically-promote-bmp9-induced-osteogenic-differentiation-of-mesenchymal-stem-cells-mscs
#7
Yulong Zou, Nader Taheri Qazvini, Kylie Zane, Monirosadat Sanaz Sadati, Qiang Wei, Junyi Liao, Jiaming Fan, Dongzhe Song, Jianxiang Liu, Chao Ma, Xiangyang Qu, Liqun Chen, Xinyi Yu, Zhicai Zhang, Chen Zhao, Zongyue Zeng, Ruyi Zhang, Shujuan Yan, Tingting Wu, Xingye Wu, Yi Shu, Yasha Li, Wenwen Zhang, Russell R Reid, Michael J Lee, Jennifer M Wolf, Matthew Tirrell, Tong-Chuan He, Juan J de Pablo, Zhong-Liang Deng
Graphene-based materials have been used in many fields but have only found limited applications in biomedicine, including bone tissue engineering. Here we demonstrate that novel hybrid materials consisting of gelatin-derived graphene and silicate nanosheets of Laponite (GL) are biocompatible and promote osteogenic differentiation of mesenchymal stem cells (MSCs). Homogeneous cell attachment, long-term proliferation and osteogenic differentiation of MSCs on GL-scaffold were confirmed by optical microscopy, and scanning electron microscopy...
April 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28397603/masculinization-related-genes-and-cell-mass-structures-during-early-gonadal-differentiation-in-the-african-clawed-frog-xenopus-laevis
#8
Mikako Wada, Kazuko Fujitani, Kei Tamura, Shuuji Mawaribuchi, Yosuke Kamata, Nobuhiko Takamatsu, Michihiko Ito
The African clawed frog Xenopus laevis has a female heterogametic ZZ/ZW-type sex-determining system. We previously discovered a W-linked female sex-determining gene dm-W that is involved in ovary formation, probably through the up-regulation of the estrogen synthesis genes cyp19a1 and foxl2. We also reported that a unique "mass-in-line structure", which disappears from ZZ gonads during early testicular development, might serve as the basis for ovary differentiation in ZW gonads. However, the molecular mechanisms underlying early masculinization are poorly understood...
April 2017: Zoological Science
https://www.readbyqxmd.com/read/28397071/taurine-promotes-the-cartilaginous-differentiation-of-human-umbilical-cord-derived-mesenchymal-stem-cells-in-vitro
#9
Xiuhua Yao, Huiling Huang, Zhou Li, Xiaohua Liu, Weijia Fan, Xinping Wang, Xuelian Sun, Jianmin Zhu, Hongrui Zhou, Huaying Wei
Taurine has been reported to influence osteogenic differentiation, but the role of taurine on cartilaginous differentiation using human umbilical cord-derived mesenchymal stem cells (hUC-MSCs) remains unclear. In this study, we investigated the effect of taurine (0, 1, 5 and 10 mM) on the proliferation and chondrogenesis of hUC-MSCs by analyzing cell proliferation, accumulation of glycosaminoglycans and expression of cartilage specific mRNA. The results show though taurine did not affected the proliferation of hUC-MSCs, 5 mM of taurine is sufficient to enhanced the accumulation of glycosaminoglycans and up-regulate cartilage specific mRNA expression, namely collagen type II, aggrecan and SOX9...
April 10, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28396584/a-high-glucose-diet-affects-achilles-tendon-healing-in-rats
#10
Stefanie Korntner, Nadja Kunkel, Christine Lehner, Renate Gehwolf, Andrea Wagner, Peter Augat, Daniel Stephan, Verena Heu, Hans-Christian Bauer, Andreas Traweger, Herbert Tempfer
Chronic and acute tendinopathies are difficult to treat and tendon healing is generally a very slow and incomplete process and our general understanding of tendon biology and regeneration lags behind that of muscle or bone. Although still largely unexplored, several studies suggest a positive effect of nutritional interventions on tendon health and repair. With this study, we aim to reveal effects of a high-glucose diet on tendon neoformation in a non-diabetic rat model of Achilles tenotomy. After surgery animals received either a high-glucose diet or a control diet for 2 and 4 weeks, respectively...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28392805/cadherins-associate-with-distinct-stem-cell-related-transcription-factors-to-coordinate-the-maintenance-of-stemness-in-triple-negative-breast-cancer
#11
Chuanwei Yang, Xuemei Zhao, Naipeng Cui, Yulong Liang
Triple-negative breast cancer (TNBC) is an aggressive type of breast cancer with poor prognosis and is enriched in cancer stem cells (CSCs). However, it is not completely understood how the CSCs were maintained in TNBC. In this study, by analyzing The Cancer Genome Atlas (TCGA) provisional datasets and several small-size breast datasets, we found that cadherins (CDHs) 2, 4, 6, and 17 were frequently amplified/overexpressed in 47% of TNBC while E-cadherin (CDH1) was downregulated/mutated at 10%. The alterations of CDH2/4/6/17 were strongly associated with the elevated levels of several stem cell-related transcription factors (SC-TFs) including FOXM1, MCM2, WWTR1, SNAI1, and SOX9...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28392504/defects-in-the-first-wave-of-folliculogenesis-in-mouse-xo-ovaries
#12
Kento Miura, Chiharu Murata, Kyoko Harikae, Hitomi Suzuki, Masami Kanai-Azuma, Masamichi Kurohmaru, Naoki Tsunekawa, Yoshiakira Kanai
In mouse ovaries, the first wave of folliculogenesis perinatally starts near the medullary region, which directs the initial round of follicular growth soon after birth. At the same time, cortical primordial follicles start forming in the ovarian surface region, and then some are cyclically recruited for the second and subsequent rounds of follicular growth. Recent studies suggest different dynamics between the first and subsequent waves of follicular growth in postnatal ovaries. However, the phenotypic differences between these phases remain unclear...
April 10, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28386540/sox9-expression-in-amniotes-species-specific-differences-in-the-formation-of-digits
#13
Juan A Montero, Carlos I Lorda-Diez, Javier Francisco-Morcillo, Jesus Chimal-Monroy, Juan A Garcia-Porrero, Juan M Hurle
In tetrapods the digit pattern has evolved to adapt to distinct locomotive strategies. The number of digits varies between species or even between hindlimb and forelimb within the same species. These facts illustrate the plasticity of embryonic limb autopods. Sox9 is a precocious marker of skeletal differentiation of limb mesenchymal cells. Its pattern of expression in the developing limb has been widely studied and reflects the activity of signaling cascades responsible for skeletogenesis. In this assay we stress previously overlooked differences in the pattern of expression of Sox9 in limbs of avian, mouse and turtle embryos which may reflect signaling differences associated with distinct limb skeletal morphologies observed in these species...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28385905/in-vivo-characterization-of-an-ahr-dependent-long-non-coding-rna-required-for-proper-sox9b-expression
#14
Gloria R Garcia, Britton C Goodale, Michelle W Wiley, Jane K La Du, David A Hendrix, Robert L Tanguay
Xenobiotic activation of the aryl hydrocarbon receptor (AHR) by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) prevents the proper formation of craniofacial cartilage and the heart in developing zebrafish. Downstream molecular targets responsible for AHR-dependent adverse effects remain largely unknown; however, in zebrafish sox9b has been identified as one of the most reduced transcripts in several target organs and is hypothesized to have a causal role in TCDD-induced toxicity. The reduction of sox9b expression in TCDD-exposed zebrafish embryos has been shown to contribute to heart and jaw malformation phenotypes...
April 6, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28385113/hypoxia-for-msc-expansion-and-differentiation-the-best-way-for-enhancing-tgf%C3%A3-induced-chondrogenesis-and-preventing-calcifications-in-alginate-beads
#15
Christel Henrionnet, Gai Liang, Emilie Roeder, Manuel Dossot, Hui Wang, Jacques Magdalou, Pierre Gillet, Astrid Pinzano
We examined the respective influence of a sequential or a continuous hypoxia during expansion and TGF-ß1-driven chondrogenic differentiation of human bone marrow mesenchymal stem cells (MSCs). The differentiation was performed within alginate beads, a classical tool for the implantation of MSCs within the joint. The standard normoxic 2D (expansion) and 3D (differentiation) MSCs cultures served as reference. In order to determine the quality of the chondrogenesis, we analyzed typical markers such as type II and X collagens, SOX9, COMP, versican, and aggrecan mRNAs using PCR and we assessed the production of type II collagen and HIF-1α by histological stainings...
April 7, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28372298/effect-of-nicotine-on-the-proliferation-and-chondrogenic-differentiation-of-the-human-wharton-s-jelly-mesenchymal-stem-cells
#16
Xu Yang, Yongjian Qi, Léonore Avercenc-Leger, Jean-Baptiste Vincourt, Sébastien Hupont, Céline Huselstein, Hui Wang, Liaobin Chen, Jacques Magdalou
BACKGROUND: Osteoarthritis (OA) is a chronic joint disease characterized by a progressive and irreversible degeneration of articular cartilage. Among the environmental risk factors of OA, tobacco consumption features prominently, although, there is a great controversy regarding the role of tobacco smoking in OA development. Among the numerous chemicals present in cigarette smoke, nicotine is one of the most physiologically active molecules. OBJECTIVE: The aim of the study was (i) to measure the impact of nicotine on the proliferation and chondrogenic differentiation of mesenchymal stem cells from the human Wharton's jelly (hWJ-MSCs) into chondrocytes, (ii) to investigate whether the α7 nicotinic acetylcholine receptors (nAChRs) was expressed in hWJ-MSCs and could play a role in the process...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28370559/transcription-factor-sox10-regulates-oligodendroglial-sox9-levels-via-micrornas
#17
Simone Reiprich, Martina Cantone, Matthias Weider, Tina Baroti, Jan Wittstatt, Christian Schmitt, Melanie Küspert, Julio Vera, Michael Wegner
During development of myelin-forming oligodendrocytes in the central nervous system the two closely related transcription factors Sox9 and Sox10 play essential roles that are partly shared and partly unique. Whereas Sox9 primarily functions during oligodendroglial specification, Sox10 is uniquely required to induce terminal differentiation and myelination. During this process, Sox10 protein levels rise substantially. As this coincides with a reciprocal decrease in Sox9, we postulated that Sox10 influences Sox9 amounts in differentiating oligodendrocytes...
April 3, 2017: Glia
https://www.readbyqxmd.com/read/28370166/mechanism-of-arsenite-toxicity-in-embryonic-stem-cells
#18
Naimisha Beeravolu, Christina McKee, G Rasul Chaudhry
Environmental arsenite exposure has been linked to cancer as well as other diseases, presenting an important and serious public health problem. Toxicity of inorganic arsenite (iAs) has been investigated using animal models and cell culture, yet its developmental effects are poorly understood. This study investigated the molecular mechanism of iAs toxicity to ascertain insight into development and differentiation processes using mouse embryonic stem cells (ESCs). The results showed that iAs exposure affected morphology and integrity of ESC colonies as well as inhibited cell growth in a concentration-dependent manner, excluding concentrations <1 μM iAs which stimulated ESC growth...
April 3, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28369921/global-chondrocyte-gene-expression-after-a-single-anabolic-loading-period-time-evolution-and-re-inducibility-of-mechano-responses
#19
Simone Scholtes, Elisabeth Krämer, Melanie Weisser, Wolfgang Roth, Reto Luginbühl, Tobias Grossner, Wiltrud Richter
OBJECTIVE: A genome-wide identification of mechano-regulated genes and candidate pathways in human chondrocytes subjected to a single anabolic loading episode and characterization of time evolution and re-inducibility of the response. DESIGN: Osteochondral constructs consisting of a chondrocyte-seeded collagen-scaffold connected to β-tricalcium-phosphate were pre-cultured for 35 days and subjected to dynamic compression (25% strain, 1 Hz, 9 × 10 minutes over 3h) before microarray-profiling was performed...
March 28, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28365713/methylation-patterns-of-sox3-sox9-and-wnt4-genes-in-gonads-of-dogs-with-xx-sry-negative-disorder-of-sexual-development
#20
Sylwia Salamon, Krzysztof Flisikowski, Marek Switonski
Ovotesticular or testicular disorder of sexual development in dogs with female karyotype and lack of SRY (XX DSD) is a common sexual anomaly diagnosed in numerous breeds. The molecular background, however, remains unclear, and epigenetic mechanisms, including DNA methylation, have not been studied. The aim of our study was comparative methylation analysis of CpG islands in promoters of candidate genes for XX DSD: SOX9, SOX3, and WNT4. Methylation studies were performed on DNA extracted from formalin-fixed/paraffin-embedded or frozen gonads from 2 dogs with ovotesticular and 2 dogs with testicular XX DSD as well as control females (n = 4) and males (n = 2)...
April 1, 2017: Sexual Development: Genetics, Molecular Biology, Evolution, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation
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