Glycan and gene chip analysis of purified osteoclast cell populations
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE28947 | GEO | 2011/04/29
SECONDARY ACCESSION(S): PRJNA140429
REPOSITORIES: GEO
Similar Datasets
Project description:Osteoclast derived from macrophage lineage cells are responsible for bone resorption and important in bone remodeling. Emerging of a new discipline-osteoimmunology highlights the important connection between immunology and bone biology. We had mouse osteoclast's RNA samples analyzed by the consortium’s gene microarray and identified a number of significant changes in expression of genes involved in glycan biosynthesis. Osteoclasts were treated with: control, Rankl (Receptor activator of nuclear factor kappa-B ligand (RANKL), tunicamycin, and both rankl and tunicamycin. RNA preparations from osteoclasts purified from mice: control (1,2,3), Rankl (1,2,3), tunicamycin (1,2,3), and both rankl and tunicamycin (1,2,3) were sent to the Microarray Core (E). The RNA was amplified, labeled, and hybridized to the GLYCOv3 microarrays.
2011-04-29 | E-GEOD-28947 | biostudies-arrayexpress
Project description:Osteoporosis and bone fractures affect millions of men and women worldwide and are often due to increased bone resorption (bone loss) mediated by osteoclasts. Here, we identify a novel role for the cytoplasmic protein ELMO1 as an important ‘signaling node’ controlling the bone resorption function of osteoclasts. Initially, we noted association of ELMO1 SNPs with bone abnormalities and altered bone density in humans. Experimentally, ELMO1 emerged as a promoter of bone loss wherein deletion of ELMO1 reversed osteoporosis / bone erosions in four in vivo mouse models: osteoprotegerin deficiency, ovariectomy, and two types of inflammatory arthritis. However, ELMO1 did not promote bone loss under homeostatic conditions. Mechanistic studies pointed to a larger ELMO1 signaling network that regulates osteoclast activity at several levels. First, transcriptomics coupled with CRISPR/Cas9 genetic deletion approaches identified new regulators of osteoclast function associated with Elmo1. Second, defining the ‘ELMO1 interactome’ in osteoclasts via proteomics revealed proteins linked to bone degradation. Third, ELMO1 affects the formation of the actin ring /sealing zone on bone-like surfaces and the distribution of osteoclast-specific proteases. Finally, a 3D structure-based inhibitory peptide targeting a highly conserved region of ELMO1 reduced bone resorption in wild type osteoclasts. Collectively, these data identify ELMO1 as a signaling hub that regulates osteoclast function and bone loss, with relevance to diseases such as osteoporosis and arthritis.
2021-06-07 | PXD023578 | Pride
Project description:Osteoclasts are absorptive cells and play a critical role in homeostatic bone remodeling and pathological bone resorption. Emerging evidence suggests an important role for epigenetic regulation of osteoclastogenesis. In this study, we investigated the role of DOT1L, which regulates gene expression epigenetically by histone H3K79 methylation during osteoclast formation. DOT1L and H3K79me2 levels were upregulated during osteoclast differentiation. Small molecule inhibitor- (EPZ5676 or EPZ004777) or short hairpin RNA-mediated reduction in DOT1L expression promoted osteoclast differentiation and resorption. DOT1L inhibition also increased osteoclast area and accelerated bone mass reduction in a mouse ovariectomy (OVX) model of osteoporosis. DOT1L inhibitors did not alter osteoblast differentiation in vitro and in vivo. Proteomics data, together with bioinformatics analysis, revealed that DOT1L inhibition altered reactive oxygen species (ROS) generation, autophagy activation, and cell fusion-related protein expression. ROS generation increased, and autophagy activation and cell migration ability enhancement were verified subsequently by flow cytometry and transwell migration assays. DOT1L inhibition increased NFATc1 nuclear translocation and NF-κB activation and strengthend osteoclast fusion and expression of resorption-related protein CD9, and MMP9 in osteoclasts derived from RAW264.7. Our findings support a new mechanism of DOT1L-mediated H3K79me2 epigenetic regulation of osteoclast differentiation, implicating DOT1L as a new therapeutic target for osteoclast dysregulation-induced disease.
2018-01-24 | PXD006448 | Pride
Project description:Osteoporosis and bone fractures affect millions of men and women worldwide and are often due to increased bone resorption (bone loss) mediated by osteoclasts. Here, we identify a novel role for the cytoplasmic protein ELMO1 as an important ‘signaling node’ controlling the bone resorption function of osteoclasts. Initially, we noted association of ELMO1 SNPs with bone abnormalities and altered bone density in humans. Experimentally, ELMO1 emerged as a promoter of bone loss wherein deletion of ELMO1 reversed osteoporosis / bone erosions in four in vivo mouse models: osteoprotegerin deficiency, ovariectomy, and two types of inflammatory arthritis. However, ELMO1 did not promote bone loss under homeostatic conditions. Mechanistic studies pointed to a larger ELMO1 signaling network that regulates osteoclast activity at several levels. First, transcriptomics coupled with CRISPR/Cas9 genetic deletion approaches identified new regulators of osteoclast function associated with Elmo1, including cathepsin G and myeloperoxidase. Second, defining the ‘ELMO1 interactome’ in osteoclasts via proteomics revealed membrane proteins and v-ATPases required for bone degradation. Third, ELMO1 affects the formation of the actin ring /sealing zone on bone-like surfaces and the distribution of osteoclast-specific proteases. Finally, a 3D structure-based inhibitory peptide targeting a highly conserved region of ELMO1 reduced bone resorption in wild type osteoclasts. Collectively, these data identify ELMO1 as a signaling hub that regulates osteoclast function and bone loss, with relevance to diseases such as osteoporosis and arthritis.
2021-06-05 | GSE164826 | GEO
Project description:Wolff’s law and the Utah Paradigm of skeletal physiology state that bone architecture adapts to mechanical loads. These models predict the existence of a mechanostat that links strain induced by mechanical forces to skeletal remodeling. However, how the mechanostat influences bone remodeling remains elusive. Here, we find that Piezo1 deficiency in osteoblastic cells leads to loss of bone mass and spontaneous fractures with increased bone resorption. Furthermore, Piezo1-deficient mice are resistant to further bone loss and bone resorption induced by hind limb unloading, demonstrating that PIEZO1 can affect osteoblast-osteoclast crosstalk in response to mechanical forces. At the mechanistic level, in response to mechanical loads, PIEZO1 in osteoblastic cells controls the YAP-dependent expression of type II and IX collagens. In turn, these collagen isoforms regulate osteoclast differentiation. Taken together, our data identify PIEZO1 as the major skeletal mechanosensor that tunes bone homeostasis.
2019-12-07 | GSE135282 | GEO
Project description:Osteoclasts and osteoblasts play a critical role in bone remodeling, and their dysregulation leads to pathological bone loss. However, precise regulation of their differentiation remains not fully elucidated. This study investigates the role of transcriptional regulator Zinc Finger Matrin-Type 1 (Zmat1) in both osteoclastogenesis and osteoblastogenesis. Zmat1 deficiency resulted in decreased osteoclast activity, and reduced bone resorption. Mechanististically, ZMAT1 was significantly upregulated during osteoclast differentiation and acted as a transcriptional repressor of the E3 ubiquitin ligase TRIM46, which then regulates YAP1 degradation via K48-linked ubiquitination. Furthermore, Zmat1 deficiency also enhanced osteoblast activity and bone formation. These findings highlight a novel ZMAT1/TRIM46/YAP1 axis, providing new insights into the transcriptional regulation of both osteoclast and osteoblast differentiation, and present potential therapeutic targets for osteoporosis.
2024-08-15 | GSE274540 | GEO
Project description:Microgravity leads to a 10-15% loss of bone mass in astronauts during space flight. Osteoclast is the multinucleated bone resorbing cell. In this study, we used NASA developed ground based Rotary Wall Vessel Bioreactor (RWV), Rotary Cell Culture System (RCCS) to simulate microgravity (μXg) conditions and demonstrated a significant increase (2-fold) in osteoclastogenesis compared to ground based control (Xg) mouse bone marrow cultures. We further determined the gene expression profiling of RAW 264.7 osteoclast progenitor cells in microgravity by agilent microarray analysis. Gene expression pattern was functional group clustered by transcriptome analysis using gene ontology tree machine (GOTM) for cell proliferation/survival, differentiation and function. We confirm the microgravity modulated gene expression critical for osteoclast differentiation by real-time RT-PCR and Western blot analysis in murine bone marrow cultures. We identify transcription factors such as c-Jun, c-Fos, PU-1 critical for osteoclast differentiation is up-regulated in microgravity conditions. In addition, microgravity resulted in 2.3 and 2.0-fold increase in the level of cathepsin K and MMP-9 matrix metalloproteinase expression in preosteoclast cells involved in the bone resorption process respectively. We also demonstrate a significant increase in the expression levels of M-CSF receptor, c-Fms and PLCγ2 and S100A8 molecules that play an important role in Ca2+ signaling essential for osteoclast function. Further, microgravity stimulated preosteoclast cells showed elevated cytosolic Ca2+ levels compared to ground based control cells. Thus, microgravity regulated gene expression profiling in preosteoclast cells provide new insights in to molecular mechanisms and therapeutic targets of osteoclast differentiation/activation responsible for bone loss and fracture risk in astronauts during space flight mission. Microgravity associated with space flight is a challenge for normal bone homeostasis. Astronauts experience 10-15% bone loss during a space flight mission. We aimed to determine the effect of simulated microgravity on osteoclast preosteoclasts cells. RAW264.7 cells (1.5 x 106 /ml) were loaded in RCCS with DMEM containing 10% FBS for 24 h. The cells were stimulated with RANKL (80ng/ml) for 24 h to obtain preosteoclasts in parallel with ground based control cells. Total RNA was isolated using RNAzol reagent (Biotecx Labs, Houston, TX) from control (Xg) and microgravity (μXg) subjected cells and hybridized with Agilent whole mouse genome 4x44K array system. Slides were washed and scanned on an Agilent G2565 microarray scanner. Data obtained were analyzed with Agilent feature extraction and GeneSpring GX v7.3.1 software packages (Genus biosystem, Inc. Northbrook, IL, USA).
2010-04-07 | E-GEOD-21093 | biostudies-arrayexpress
Project description:Bone remodeling is a tightly regulated process that engages degradation and biogenesis of the bone matrix. The process is controlled by two major cell types, bone forming cells-osteoblasts and bone-degrading cells-osteoclasts. We are interested in the bone-resorption mechanism mediated by osteoclasts and wish to identify glycosylation genes that are regulated during the formation of osteoclast cells and determine the function of glycosylation and glycan-binding proteins in the osteoclastogenesis. We propose to examine the gene expression patterns that are altered during the osteoclastogenesis using mouse glyco-chips and RNA samples isolated from osteoclast precursors and mature osteoclasts prepared from mouse bone marrows. 6 chips are requested for the analysis. RNA preparations from mouse bone marrow MG2, MG4, MG6 (mature osteoclasts) and MG1, MG3, MG5 osteoclasts precursors (control) were sent to the Microarray Core (E). The RNA was amplified, labeled, and hybridized to the GLYCOv3 microarrays.
2011-04-29 | E-GEOD-28937 | biostudies-arrayexpress
Project description:Osteoclasts and osteoblasts play a critical role in bone remodeling, and their dysregulation leads to pathological bone loss. However, precise regulation of their differentiation remains not fully elucidated. This study investigates the role of transcriptional regulator Zinc Finger Matrin-Type 1 (Zmat1) in both osteoclastogenesis and osteoblastogenesis. Zmat1 deficiency resulted in decreased osteoclast activity, and reduced bone resorption. Mechanististically, ZMAT1 was significantly upregulated during osteoclast differentiation and acted as a transcriptional repressor of the E3 ubiquitin ligase TRIM46, which then regulates YAP1 degradation via K48-linked ubiquitination. Furthermore, Zmat1 deficiency also enhanced osteoblast activity and bone formation. These findings highlight a novel ZMAT1/TRIM46/YAP1 axis, providing new insights into the transcriptional regulation of both osteoclast and osteoblast differentiation, and present potential therapeutic targets for osteoporosis.
2024-08-22 | GSE274930 | GEO
Project description:Osteoclasts and osteoblasts play a critical role in bone remodeling, and their dysregulation leads to pathological bone loss. However, precise regulation of their differentiation remains not fully elucidated. This study investigates the role of transcriptional regulator Zinc Finger Matrin-Type 1 (Zmat1) in both osteoclastogenesis and osteoblastogenesis. Zmat1 deficiency resulted in decreased osteoclast activity, and reduced bone resorption. Mechanististically, ZMAT1 was significantly upregulated during osteoclast differentiation and acted as a transcriptional repressor of the E3 ubiquitin ligase TRIM46, which then regulates YAP1 degradation via K48-linked ubiquitination. Furthermore, Zmat1 deficiency also enhanced osteoblast activity and bone formation. These findings highlight a novel ZMAT1/TRIM46/YAP1 axis, providing new insights into the transcriptional regulation of both osteoclast and osteoblast differentiation, and present potential therapeutic targets for osteoporosis.
2024-08-15 | GSE274533 | GEO