Project description:the objective of this study was to analyze the role of NGF and BDNF in the inflammatory process of OA and their effects on chondrogenesis, chondrocyte differentiation, cartilage degeneration and pain
Project description:BMSC gene expression profiling was completed to examine the baseline neurotrophin and receptor gene expression in BMSC and to evaulate changes in gene expression in response to NGF or BDNF stimulation In the study, primary BMSC were treated with recombinant human NGF or BDNF for 24 hours. Following treatment, RNA isolated from the BMSC were analyzed using the Human Neurotrophin and Receptor Gene Array HS-018
Project description:BMSC gene expression profiling was completed to examine the baseline neurotrophin and receptor gene expression in BMSC and to evaulate changes in gene expression in response to NGF or BDNF stimulation
Project description:We report that developmental competition between sympathetic neurons for survival is critically dependent on a sensitization process initiated by target innervation and mediated by a series of feedback loops. Target-derived nerve growth factor (NGF) promoted expression of its receptor TrkA in neurons and prolonged TrkA-mediated signals. NGF also controlled expression of brain derived neurotrophic factor (BDNF) and neurotrophin-4 (NT4), which, through the receptor p75, can kill neighboring neurons with low retrograde NGFâ??TrkA signaling whereas neurons with high NGFâ??TrkA signaling are protected. Perturbation of any of these feedback loops disrupts the dynamics of competition. We suggest that three target-initiated events are essential for rapid and robust competition between neurons: sensitization, paracrine apoptotic signaling, and protection from such effects. Experiment Overall Design: This experiment examine gene expression differences in superior cervical ganglia fro P0 bax null versus NGF-Bax double null animals. The Bax genotype was used in order to prevent the neuronal cell death normally observed in the NGF null animal.
Project description:We report that developmental competition between sympathetic neurons for survival is critically dependent on a sensitization process initiated by target innervation and mediated by a series of feedback loops. Target-derived nerve growth factor (NGF) promoted expression of its receptor TrkA in neurons and prolonged TrkA-mediated signals. NGF also controlled expression of brain derived neurotrophic factor (BDNF) and neurotrophin-4 (NT4), which, through the receptor p75, can kill neighboring neurons with low retrograde NGF–TrkA signaling whereas neurons with high NGF–TrkA signaling are protected. Perturbation of any of these feedback loops disrupts the dynamics of competition. We suggest that three target-initiated events are essential for rapid and robust competition between neurons: sensitization, paracrine apoptotic signaling, and protection from such effects. Keywords: comparative gene expression analysis
Project description:Expression profiling of PC12 cells stably transfected with GFP, GFP-SH2-Bb, or GFP-SH2-Bb(R555E), treated with or without NGF for 6h Keywords: response to NGF
Project description:Histone deacetylase inhibitors are efficacious epigenetic-based therapies for some cancers and neurological disorders; however, these drugs inhibit multiple Hdacs and have detrimental effects on the pre- and post-natal skeleton. To better understand how Hdac inhibitors affect the skeleton, we focused on understanding the role of one of their targets, Hdac3, in endochondral bone formation by deleting it in immature murine chondrocyte micro masses with Adeno-Cre. Hdac3-deficient chondrocytes expressed higher levels of pro-inflammatory and matrix degrading genes (e.g., Il-6, Mmp3, Mmp13, Saa3) and lower levels of genes related to the extracellular matrix production, bone development and ossification (e.g., Acan, Col2a1, Ihh, Col10a1). Histone acetylation was increased in and around genes with elevated expression. High Throughput RNA sequencing and Chromatin immunopreciptation sequencing experiments were performed in chondrocyte cultures. Differential analysis was conducted on ChIP-seq and RNA-seq data to identify H3K27Ac profile for up and down regulated genes in Hdac3-deficient murine chondrocytes.
Project description:miRNA profiling of PC12 rat pheochromocytoma cells during NGF-induced differentiation and apoptosis of differentiated cells after 24h of NGF deprivation. miRNA expression in differentiating and deprivated cells was compared to untreated and terminally differentiated PC12 cells respectivelly.
Project description:Transcriptional profiling of mouse chondrocytes cells comparing control untreated chondrocytes cells with chondrocytes cells plated in stiff and soft ECM. Goal was to determine the effects of ECM stiffness on gene expression.
Project description:BDNF Val66Met mice, a model that is genetically susceptible to stress, recapitulated the translational effects of acute stress in the absence of applied stressors. However, unstressed heterozygous BDNF Val66Met mice did not display activation of immediate early genes, indicating a “pre-stressed” translational phenotype.