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https://www.readbyqxmd.com/read/28731788/identification-of-osr2-transcriptional-target-genes-in-palate-development
#1
X Fu, J Xu, P Chaturvedi, H Liu, R Jiang, Y Lan
Previous studies have identified the odd-skipped related 2 (Osr2) transcription factor as a key intrinsic regulator of palatal shelf growth and morphogenesis. However, little is known about the molecular program acting downstream of Osr2 in the regulation of palatogenesis. In this study, we isolated palatal mesenchyme cells from embryonic day 12.5 (E12.5) and E13.5 Osr2(RFP/+) and Osr2(RFP/-) mutant mouse embryos and performed whole transcriptome RNA sequencing analyses. Differential expression analysis of the RNA sequencing datasets revealed that expression of 70 genes was upregulated and expression of 61 genes was downregulated by >1...
July 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28720797/commensal-gut-microbiota-immunomodulatory-actions-in-bone-marrow-and-liver-have-catabolic-effects-on-skeletal-homeostasis-in-health
#2
Chad M Novince, Carolyn R Whittow, Johannes D Aartun, Jessica D Hathaway, Nicole Poulides, Michael B Chavez, Heidi M Steinkamp, Kaeleigh A Kirkwood, Emily Huang, Caroline Westwater, Keith L Kirkwood
Despite knowledge the gut microbiota regulates bone mass, mechanisms governing the normal gut microbiota's osteoimmunomodulatory effects on skeletal remodeling and homeostasis are unclear in the healthy adult skeleton. Young adult specific-pathogen-free and germ-free mice were used to delineate the commensal microbiota's immunoregulatory effects on osteoblastogenesis, osteoclastogenesis, marrow T-cell hematopoiesis, and extra-skeletal endocrine organ function. We report the commensal microbiota has anti-anabolic effects suppressing osteoblastogenesis and pro-catabolic effects enhancing osteoclastogenesis, which drive bone loss in health...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719571/mir-27b-3p-suppressed-osteogenic-differentiation-of-maxillary-sinus-membrane-stem-cells-by-targeting-sp7
#3
Wei Peng, Shuangxi Zhu, Xiang Li, Junquan Weng, Songling Chen
OBJECTIVE: To explore the critical role and function of miRNAs in the regulation of development and physiology of maxillary sinus membrane stem cell (MSMSC) osteogenesis. METHODS: Microarray analysis was performed to screen the miRNAs expression profiles during the process of MSMSC osteogenic differentiation. Quantitative real-time polymerase chain reaction was applied to verify the miRNAs expression profiles. Gain- and loss-of-function experiments were used to demonstrate that miR-27b-3p inhibited MSMSC osteoblastic differentiation...
August 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28711791/labeled-azospirillum-brasilense-wild-type-and-excretion-ammonium-strains-in-association-with-barley-roots
#4
Adrian Richard Schenberger Santos, Rafael Mazer Etto, Rafaela Wiegand Furmam, Denis Leandro de Freitas, Karina Freire d'Eça Nogueira Santos, Emanuel Maltempi de Souza, Fábio de Oliveira Pedrosa, Ricardo Antônio Ayub, Maria Berenice Reynaud Steffens, Carolina Weigert Galvão
Soil bacteria colonization in plants is a complex process, which involves interaction between many bacterial characters and plant responses. In this work, we labeled Azospirillum brasilense FP2 (wild type) and HM053 (excretion-ammonium) strains by insertion of the reporter gene gusA-kanamycin into the dinitrogenase reductase coding gene, nifH, and evaluated bacteria colonization in barley (Hordeum vulgare). In addition, we determined inoculation effect based on growth promotion parameters. We report an uncommon endophytic behavior of A...
July 4, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28574187/menopause-transition-promotes-distinct-modulation-of-mrnas-and-mirnas-expression-in-calvaria-and-bone-marrow-osteoblastic-cells
#5
Mayara Sgarbi Semeghini, Fernanda Grilo de Azevedo, Roger Rodrigo Fernandes, Amanda Freire Assis, Janaína Andrea Dernowsek, Adalberto Luiz Rosa, Selma Siéssere, Geraldo Aleixo Passos, Karina Fittipaldi Bombonato-Prado
Investigation on functional genome research may contribute to the knowledge of functional roles of different mRNAs and miRNAs in bone cells of osteoporotic animals. Currently, few studies indicate the changes in gene modulation that osteoporosis causes in osteoblastic cells from different sites. Thus, the purpose of this investigation was to evaluate cell viability, alkaline phosphatase activity and modulation of mRNAs/miRNAs in osteoblastic cells from calvaria and bone marrow by means of microarray technology...
June 2, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28439037/regulation-of-a-glycerol-induced-quinoprotein-alcohol-dehydrogenase-by-%C3%AF-54-and-a-luxr-type-regulator-in-azospirillum-brasilense-sp7
#6
Vijay Shankar Singh, Ashutosh Prakash Dubey, Ankush Gupta, Sudhir Singh, Bhupendra Narain Singh, Anil Kumar Tripathi
Azospirillum brasilense Sp7 uses glycerol as a carbon source for growth and nitrogen fixation. When grown in medium containing glycerol as a source of carbon, it upregulates the expression of a protein which was identified as quinoprotein alcohol dehydrogenase (ExaA). Inactivation of exaA adversely affects the growth of A. brasilense on glycerol. A determination of the transcription start site of exaA revealed an RpoN-dependent -12/-24 promoter consensus. The expression of an exaA::lacZ fusion was induced maximally by glycerol and was dependent on σ(54) Bioinformatic analysis of the sequence flanking the -12/-24 promoter revealed a 17-bp sequence motif with a dyad symmetry of 6 nucleotides upstream of the promoter, the disruption of which caused a drastic reduction in promoter activity...
July 1, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28437476/clc-3-chloride-channel-mediates-the-role-of-parathyroid-hormone-1-34-on-osteogenic-differentiation-of-osteoblasts
#7
Xiaolin Lu, Yin Ding, Qiannan Niu, Shijie Xuan, Yan Yang, Yulong Jin, Huan Wang
INTRODUCTION: Different concentrations of parathyroid hormone [1-34] (PTH [1-34]) can have totally opposite effects on osteoblasts. Intermittent stimulation with PTH can significantly increase bone mineral density in vitro, mainly through the protein kinase A (PKA) signaling pathway, which phosphorylates runt-related transcription factor 2 (Runx2). The ClC-3 chloride channel, an important anion channel, can also promote osteogenesis via the Runx2 pathway based on recent studies. The purpose of our study, therefore, is to research whether the ClC-3 chloride channel has an effect on PTH osteodifferentiation in MC3T3-E1 cells...
2017: PloS One
https://www.readbyqxmd.com/read/28425950/diversity-analysis-and-bioresource-characterization-of-halophilic-bacteria-isolated-from-a-south-african-saltpan
#8
Ramganesh Selvarajan, Timothy Sibanda, Memory Tekere, Hlengilizwe Nyoni, Stephen Meddows-Taylor
Though intensive research has been channeled towards the biotechnological applications of halophiles and other extremophilic microbes, these studies have not been, by any means, exhaustive. Saline environments still offer a vast diversity of microbes with potential to produce an array of natural products which can only be unlocked by concerted research efforts. In this study, a combination of culture and molecular approaches were employed to characterize halophilic bacteria from saltpan water samples and profile their potential biotechnological applications...
April 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28416707/distinct-domains-of-chea-confer-unique-functions-in-chemotaxis-and-cell-length-in-azospirillum-brasilense-sp7
#9
Jessica M Gullett, Amber Bible, Gladys Alexandre
Chemotaxis is the movement of cells in response to gradients of diverse chemical cues. Motile bacteria utilize a conserved chemotaxis signal transduction system to bias their motility and navigate through a gradient. A central regulator of chemotaxis is the histidine kinase CheA. This cytoplasmic protein interacts with membrane-bound receptors, which assemble into large polar arrays, to propagate the signal. In the alphaproteobacterium Azospirillum brasilense, Che1 controls transient increases in swimming speed during chemotaxis, but it also biases the cell length at division...
July 1, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28395271/differential-circrna-expression-profiles-during-the-bmp2-induced-osteogenic-differentiation-of-mc3t3-e1-cells
#10
Dong-Yang Qian, Guang-Bin Yan, Bo Bai, Yi Chen, Shu-Jiang Zhang, Yong-Chang Yao, Hong Xia
OBJECTIVE: Recent studies have indicated that circular RNAs (circRNAs) might play important roles in various diseases. However, little is known about the functions of circRNAs in the skeletal system, and the role of circRNAs in the mechanism by which bone morphogenetic protein 2 (BMP2) promotes bone differentiation remains unknown. Here, we performed RNA-seq to analyze differential expression of circRNA during different osteoblast differentiation stages and investigated the relevant mechanisms...
June 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28380697/graphene-oxide-enrichment-of-collagen-membranes-improves-dpscs-differentiation-and-controls-inflammation-occurrence
#11
Milena Radunovic, Marianna De Colli, Patrizia De Marco, Chiara Di Nisio, Antonella Fontana, Adriano Piattelli, Amelia Cataldi, Susi Zara
Collagen membranes are used in oral surgery for bone defects treatment acting as a barrier that does not allow the invasion of soft tissue into the growing bone. To improve biocompatibility collagen membranes were coated with graphene oxide (GO), a graphene derivative. The aim of this study was to investigate the biocompatibility of GO coated collagen membranes on human dental pulp stem cells (DPSCs) focusing on biomaterial cytotoxicity, ability to promote DPSCs differentiation process and to control inflammation event induction...
April 5, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28380670/improved-regeneration-and-de-novo-bone-formation-in-a-diabetic-zebrafish-model-treated-with-paricalcitol-and-cinacalcet
#12
Filipe R Carvalho, Ana R Fernandes, M Leonor Cancela, Paulo J Gavaia
Bone changes related to diabetes have been well stablished, but few strategies have been developed to prevent this growing health problem. In our work, we propose to investigate the effects of calcitriol as well as of a vitamin D analog (paricalcitol) and a calcimimetic (cinacalcet), in fin regeneration and de novo mineralization in a zebrafish model of diabetes. Following exposure of diabetic transgenic Tg(ins:nfsb-mCherry) zebrafish to calcitriol, paricalcitol and cinacalcet, caudal fins were amputated to assess their effects on tissue regeneration...
April 5, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28371128/intranuclear-actin-structure-modulates-mesenchymal-stem-cell-differentiation
#13
Buer Sen, Gunes Uzer, Rebekah M Samsonraj, Zhihui Xie, Cody McGrath, Maya Styner, Amel Dudakovic, Andre J van Wijnen, Janet Rubin
Actin structure contributes to physiologic events within the nucleus to control mesenchymal stromal cell (MSC) differentiation. Continuous cytochalasin D (Cyto D) disruption of the MSC actin cytoskeleton leads to osteogenic or adipogenic differentiation, both requiring mass transfer of actin into the nucleus. Cyto D remains extranuclear, thus intranuclear actin polymerization is potentiated by actin transfer: we asked whether actin structure affects differentiation. We show that secondary actin filament branching via the Arp2/3 complex is required for osteogenesis and that preventing actin branching stimulates adipogenesis, as shown by expression profiling of osteogenic and adipogenic biomarkers and unbiased RNA-seq analysis...
June 2017: Stem Cells
https://www.readbyqxmd.com/read/28299652/roles-of-runx2-in-skeletal-development
#14
Toshihisa Komori
Runx2 is the most upstream transcription factor essential for osteoblast differentiation. It regulates the expression of Sp7, the protein of which is a crucial transcription factor for osteoblast differentiation, as well as that of bone matrix genes including Spp1, Ibsp, and Bglap2. Runx2 is also required for chondrocyte maturation, and Runx3 has a redundant function with Runx2 in chondrocyte maturation. Runx2 regulates the expression of Col10a1, Spp1, Ibsp, and Mmp13 in chondrocytes. It also inhibits chondrocytes from acquiring the phenotypes of permanent cartilage chondrocytes...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28284792/screening-of-the-optimized-prescription-from-suqingwan-in-terms-of-its-therapeutic-effect-on-dss-induced-ulcerative-colitis-by-its-regulation-of-inflammatory-and-oxidative-mediators
#15
Jingxuan Shao, Zhihui Liu, Lin Wang, Zehai Song, Hang Chang, Na Han, Jun Yin
ETHNOPHARMACOLOGICAL RELEVANCE: Suqingwan (SQW), a traditional Chinese medicine used for treating ulcerative colitis (UC), is composed of 13 kinds of Traditional Chinese medicines (TCMs). According to TCM theory, we investigated whether a simplified prescription composed of the herbs with some functions, would have similar effects to SQW and examined its potential treatment mechanism of action. MATERIALS AND METHODS: We categorized the herbs in SQW into four groups according to their traditional functions and used an orthogonal experimental design to obtain nine separated prescriptions (SPs) of SQW...
March 8, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28263905/carotenoid-production-and-phenotypic-variation-in-azospirillum-brasilense
#16
Gal Reem Brenholtz, Dafna Tamir-Ariel, Yaacov Okon, Saul Burdman
We assessed the occurrence of phenotypic variation in Azospirillum brasilense strains Sp7, Cd, Sp245, Az39 and phv2 during growth in rich media, screening for variants altered in colony pigmentation or extracellular polysaccharide (EPS) production. Previous studies showed that EPS-overproducing variants of Sp7 appear frequently following starvation or growth in minimal medium. In contrast, no such variants were detected during growth in rich media in the tested strains except for few variants of phv2. Regarding alteration in colony pigmentation (from pink to white in strain Cd and from white to pink in the others), strain Sp7 showed a relatively high frequency of variation (0...
June 2017: Research in Microbiology
https://www.readbyqxmd.com/read/28231159/comparison-of-the-proximate-composition-total-carotenoids-and-total-polyphenol-content-of-nine-orange-fleshed-sweet-potato-varieties-grown-in-bangladesh
#17
Mohammad Khairul Alam, Ziaul Hasan Rana, Sheikh Nazrul Islam
In an attempt to develop the food composition table for Bangladesh, the nutritional composition of nine varieties of orange-fleshed sweet potato was analyzed together with total carotenoids (TCC) and total polyphenol content (TPC). Each variety showed significant variation in different nutrient contents. The quantification of the TCC and TPC was done by spectrophotometric measurement, and the proximate composition was done by the AOAC method. The obtained results showed that total polyphenol content varied from 94...
September 14, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28198109/progenitors-in-peripheral-nerves-launch-heterotopic-ossification
#18
Elizabeth A Olmsted-Davis, Elizabeth A Salisbury, Diana Hoang, Eleanor L Davis, ZaWaunyka Lazard, Corinne Sonnet, Thomas A Davis, Jonathan A Forsberg, Alan R Davis
Studies presented here, using a murine model of bone morphogenetic protein type 2 (BMP2)-induced heterotopic ossification (HO) show that the protein initiates HO by signaling through progenitors in the endoneurium of peripheral nerves. In the mouse, these cells were identified in the endoneurium one day after BMP2 induction using antibody against phosphoSMAD (PS) 1, 5, and 8. Studies conducted in a tracking mouse that contains a tamoxifen-regulated Wnt1-Cre recombinase crossed with a td Tomato red (TR) reporter (Wnt1(CreErt) :Ai9Tm) confirmed their neural origin...
April 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28150905/development-of-an-efficient-g-quadruplex-stabilised-thrombin-binding-aptamer-containing-a-three-carbon-spacer-molecule
#19
Lukas J Aaldering, Vasanthanathan Poongavanam, Niels Langkjaer, N Arul Murugan, Per Trolle Jørgensen, Jesper Wengel, Rakesh N Veedu
The thrombin-binding aptamer (TBA), which shows anticoagulant properties, is one of the most studied G-quadruplex-forming aptamers. In this study, we investigated the impact of different chemical modifications such as a three-carbon spacer (spacer-C3 ), unlocked nucleic acid (UNA) and 3'-amino-modified UNA (amino-UNA) on the structural dynamics and stability of TBA. All three modifications were incorporated at three different loop positions (T3, T7, T12) of the TBA G-quadruplex structure to result in a series of TBA variants and their stability was studied by thermal denaturation; folding was studied by circular dichroism spectroscopy and thrombin clotting time...
April 18, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28087075/cellular-transcriptional-response-to-zirconia-based-implant-materials
#20
Brigitte Altmann, Kerstin Rabel, Ralf J Kohal, Susanne Proksch, Pascal Tomakidi, Erik Adolfsson, Falk Bernsmann, Paola Palmero, Tobias Fürderer, Thorsten Steinberg
OBJECTIVE: To adequately address clinically important issues such as osseointegration and soft tissue integration, we screened for the direct biological cell response by culturing human osteoblasts and gingival fibroblasts on novel zirconia-based dental implant biomaterials and subjecting them to transcriptional analysis. METHODS: Biomaterials used for osteoblasts involved micro-roughened surfaces made of a new type of ceria-stabilized zirconia composite with two different topographies, zirconium dioxide, and yttria-stabilized zirconia (control)...
January 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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