Effect of Notch2 in chondrocytes
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE224255 | GEO | 2023/10/16
REPOSITORIES: GEO
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Project description:Effect of Notch2 in chondrocytes
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Project description:Effects of Palovarotene on Ext1-deficient and wild type cultured mouse chondrocytes
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Project description:Notch signaling is essential for proper lens development, however the specific requirements of individual Notch receptors has not been previously investigated. Here we report the lens phenotypes of Notch2 conditionally mutant mice, which exhibited severe microphthalmia, reduced pupillary openings, disrupted fiber cell morphology, eventual loss of the anterior epithelium, fiber cell dysgenesis, and cataracts. Notch2 mutants also had a persistent lens stalk phenotype at E11.5, and aberrant DNA synthesis in the fiber cell compartment by E14.5. Gene expression analyses showed elevated levels of the cell cycle regulators Cdkn1a (p21Cip1), Ccnd2 (CyclinD2) and Trp63 (p63) that negatively regulates Wnt signaling. Although removal of Notch2 phenocopied the increased proportion of fiber cells of Rbpj and Jag1 conditional mutant lenses, Notch2 is not required for AEL proliferation, suggesting that a different receptor regulates this process. Instead, we found that the Notch2 normally blocks progenitor cell death. Overall, we conclude that Notch2-mediated signaling regulates lens morphogenesis, apoptosis, cell cycle withdrawal, and secondary fiber cell differentiation. We have compared gene expression of ocular lenses of mice that are lens specific conditional mutants of Notch2 gene to that of littermate controls that had no ablation of Notch2 gene in the lens. Two lenses of each of the three conditional mutants and controls were pooled together and total RNA was harvested from embryonic day 19.5 (E19.5) lenses. Gene expression changes caused by absence of Notch2 gene in the lens were analyzed.
2011-12-31 | E-GEOD-31643 | biostudies-arrayexpress
Project description:Notch signaling is essential for proper lens development, however the specific requirements of individual Notch receptors has not been previously investigated. Here we report the lens phenotypes of Notch2 conditionally mutant mice, which exhibited severe microphthalmia, reduced pupillary openings, disrupted fiber cell morphology, eventual loss of the anterior epithelium, fiber cell dysgenesis, and cataracts. Notch2 mutants also had a persistent lens stalk phenotype at E11.5, and aberrant DNA synthesis in the fiber cell compartment by E14.5. Gene expression analyses showed elevated levels of the cell cycle regulators Cdkn1a (p21Cip1), Ccnd2 (CyclinD2) and Trp63 (p63) that negatively regulates Wnt signaling. Although removal of Notch2 phenocopied the increased proportion of fiber cells of Rbpj and Jag1 conditional mutant lenses, Notch2 is not required for AEL proliferation, suggesting that a different receptor regulates this process. Instead, we found that the Notch2 normally blocks progenitor cell death. Overall, we conclude that Notch2-mediated signaling regulates lens morphogenesis, apoptosis, cell cycle withdrawal, and secondary fiber cell differentiation.
2011-12-31 | GSE31643 | GEO
Project description:Regulated genes downsteam of Notch2 Methods: mRNA profiles of adult wild type and Notch2 CKO neural stem cells were generated by deep sequencing, in triplicate. Two libraries were generated for each RNA sample using Nextera XT DNA Library Preparation Kit (Illumina) and sequenced by SmartSeq2 kit (Illumina) on different days. Each sample was sequenced twice in two independent lanes on a Illumina HiSeq 2500. The sequence reads that passed quality filters were mapped to the mouse genome (GRCm38) by Bowtie2 and transcript identification and quantification were performed using HTSeq. qRT–PCR validation was performed using SYBR Green assays. Results: This study identifies Notch2 regulated genes in neurogenic neural stem cells of the adult mouse hippocampus.
2019-09-27 | GSE116773 | GEO
Project description:Analysis of mouse chondrocytes lacking the microRNA-140. MicroRNAs are genomically encoded small RNAs to regulate the gene expression. miR-140 shows high expression in cartilage. Results provide insight into the molecular mechanisms underlying miR-140 function in chondrocytes. Keywords: Expression profiling by array DNA microarray analysis was performed using Affymetrix mouse genome 430 2.0 array. RNA samples collected from cultured rib chondrocytes of wild-type and miR-140-/- to identify potential mRNA targets of miR-140. 2 M-BM-5g of total RNA was reverse transcribed with SuperScript II and second strand cDNA was synthesized. Biotinylated antisense cRNAs was amplified and transcribed using the GeneChip expression 3M-bM-^@M-^Y-Amplification reagent (Affymetrix). Finally, 10 M-BM-5g of cRNAs were fragmented and hybridized to GeneChip (R) Mouse Genome 430 2.0 array (Affymetrix). Microarray data were summarized by Robust Multichip Average (RMA) method and statistical analysis was performed using NIA Array Analysis (http://Igusun.grc.nia.nih.gov/ANOVA/).
2010-01-01 | E-GEOD-16007 | biostudies-arrayexpress
Project description:Purpose: To demonstrate Runx2's association with organizing the extracellular matrix in primary chondrocytes. Method: RNA samples were collected from primary chondrocytes of 5-day-old Col2a1-CreERT2;Runx2fl/fl and Runx2fl/fl mice, cultured with or without IL-1beta. Results: Thirty-three genes cultured without IL-1beta and 45 genes with IL-1beta were up- or down-regulated by more than 2-fold in the Runx2 knockout in primary chondrocytes. Conclusions: Genes including collagen fibers were down-regulated in Runx2 cKO primary chondrocytes.
2021-01-21 | GSE165084 | GEO
Project description:BBF2H7 (BBF2 human homolog on chromosome 7), an ER-resident basic leucine zipper transcription factor, is activated in response to ER stress and abundantly expresses in chondrocytes. While BBF2H7 is widely expressed in many tissues and organs, the most intense signals were detected in the proliferating zone of the cartilage. We compared gene expressions in primary cultured chondrocytes prepared from rib cartilage between WT and BBF2H7-/- mice at E18.5. Primary cultured chondrocytes were prepared from E18.5 rib cartilage of WT and BBF2H7-/- mice. Chondrocytes were isolated using 0.2% collagenase D (Roche) after adherent connective tissue was removed by 0.2% trypsin (Sigma) and collagenase pretreatment. Isolated chondrocytes were maintained in α-MEM (Gibco) supplemented with 10% FCS and 50 µg/mL ascorbic acid. Adenovirus vectors expressing the mouse p60 BBF2H7 (1-377 aa, BBF-N) were constructed with the AdenoX Expression system (Clontech), according to the manufacturerâs protocol. The cells were infected with adenoviruses 30 h before analysis. We compared gene expressions in primary cultured chondrocytes prepared from rib cartilage between WT and BBF2H7-/- mice at E18.5 using a microarray and various genes associated with protein secretory pathway and ER biogenesis were significantly down-regulated in BBF2H7-/- chondrocytes. We infected primary cultured chondrocytes prepared from BBF2H7-/- mice with adenovirus expressing p60 BBF2H7. Several genes were up-regulated and we picked up them as the direct target of BBF2H7.
2010-05-05 | E-GEOD-18052 | biostudies-arrayexpress
Project description:We used microarrays to investigate differential gene expression in mouse bone marrow derived mesenchymal stromal cells, proficient or deficient for Notch2, cultured for 5 days in the presence or absence with primary CLL cells from 6 patients
2019-05-20 | GSE99614 | GEO