Growing evidences are suggesting that extra-long genes in mammals are vulnerable for full-gene length transcription and dysregulation of long genes is a mechanism underlying human genetic disorders. Skeletal muscle expresses Dystrophin which is 2.26 Mbp in length; however, how long-distance transcription is achieved is totally unknown. We had discovered RNA-binding protein SFPQ preferentially binds to long pre-mRNAs and specifically regulates the cluster of neuronal genes > 100 kbp. Here we investigated the roles of SFPQ for long gene expression, target specificities, and also physiological functions in skeletal muscle. Loss of Sfpq selectively downregulated genes >100 kbp including Dystrophin and caused progressive muscle mass reduction and metabolic myopathy characterized by glycogen accumulation and decreased abundance of mitochondrial oxidative phosphorylation complexes. Functional clustering analysis identified metabolic pathway related genes as the targets of SFPQ. These findings indicate target gene specificities and tissue-specific physiological functions of SFPQ in skeletal muscle. Overall design: We analyzed polyA-tailed RNA profiles including transcribing RNAs in gastrocnemius skeletal muscle ( from 3 control and 3 Sfpq-/- P35 male mice) using Ion-proton.
Loss of RNA-Binding Protein Sfpq Causes Long-Gene Transcriptopathy in Skeletal Muscle and Severe Muscle Mass Reduction with Metabolic Myopathy.
Sex, Specimen part, Cell line, Subject
View SamplesGrowing evidences are suggesting that extra-long genes in mammals are vulnerable for full-gene length transcription and dysregulation of long genes is a mechanism underlying human genetic disorders. Skeletal muscle expresses Dystrophin which is 2.26 Mbp in length; however, how long-distance transcription is achieved is totally unknown. We had discovered RNA-binding protein SFPQ preferentially binds to long pre-mRNAs and specifically regulates the cluster of neuronal genes > 100 kbp. Here we investigated the roles of SFPQ for long gene expression, target specificities, and also physiological functions in skeletal muscle. Loss of Sfpq selectively downregulated genes >100 kbp including Dystrophin and caused progressive muscle mass reduction and metabolic myopathy characterized by glycogen accumulation and decreased abundance of mitochondrial oxidative phosphorylation complexes. Functional clustering analysis identified metabolic pathway related genes as the targets of SFPQ. These findings indicate target gene specificities and tissue-specific physiological functions of SFPQ in skeletal muscle. Overall design: We analyzed rRNA-depleted RNA profiles including transcribing RNAs in primary myoblasts obtained from skeletal muscles of 1-month-old SfpqSM-KO (n=1) and control (n=1) mice under differentiated condition using Ion-proton.
Loss of RNA-Binding Protein Sfpq Causes Long-Gene Transcriptopathy in Skeletal Muscle and Severe Muscle Mass Reduction with Metabolic Myopathy.
Subject
View SamplesThe development of T cells has been characterized as taking place over three stages: nave (Tn), central memory (Tcm), and effector memory (Tem) cells.
Polarization diversity of human CD4+ stem cell memory T cells.
Sex, Age
View SamplesThe molecular features of hepatocellular carcinoma arising from non-alcoholic fatty liver disease (NAFLD-HCC) are not well known. In this study, we investigated the mechanism by which NAFLD-HCC survives in a fat-rich environment. We found that caveolin (CAV)-1 was overexpressed in clinical specimens from NAFLD-HCC patients. HepG2, HLE, and HuH-7 HCC cell lines showed decreased proliferation in the presence of the saturated fatty acids palmitic acid and stearic acid, although only HLE cells expressed high levels of CAV-1. HLE cells treated with oleic acid (OA) showed robust proliferation, whereas CAV-null HepG2 cells showed reduced proliferation and increased apoptosis. CAV-1 knockdown in HLE cells attenuated the OA-induced increase in proliferation and enhanced apoptosis. Liquid chromatography-tandem mass spectrometry analysis revealed that the levels of OA-containing ceramide, a pro-apoptotic factor, were higher in HepG2 and CAV-1-deficient HLE cells than in HLE cells, suggesting that CAV-1 inhibits apoptosis by decreasing the level of OA-containing ceramide. These results indicate that CAV-1 is important for NAFLD-HCC survival in fatty acid-rich environments and is a potential therapeutic target.
Role of caveolin-1 in hepatocellular carcinoma arising from non-alcoholic fatty liver disease.
Specimen part
View SamplesTrib1 is critical for some myeloid cell differentiation.
Critical role of Trib1 in differentiation of tissue-resident M2-like macrophages.
Specimen part
View SamplesWe collected and compared samples from the cohort consisted of six groups as follows: methotrexate (MTX) monotherapy, combination therapy of MTX and infliximab (IFX), tocilizumab (TCZ) monotherapy, age- and gender-matched HC, and a small number of synovial fluid samples. In order to reduce variation due to the proportion of cells at each developmental stage, we performed transcriptome analysis after sorting CD4+ and CD8+ T cells according to developmental stage. We created a gene list that was significantly expressed in RA T cells, and revealed that pathways such as mTORC1, IL-2-stat5, Cell cycle and interferon-related genes were significantly enriched among them. Overall design: Examination among healthy controls and patients with rheumatoid arthritis, including before and after treatment
Multi-dimensional analysis identified rheumatoid arthritis-driving pathway in human T cell.
Sex, Age, Specimen part, Disease, Subject
View SamplesWe compared whole CD4+ and CD8+ T cells from frozen PBMC samples that were collected before and after treatment initiation of each patient with rheumatoid arthritis. Lists consisting of 858 and 950 differentially expressed genes were created from CD4 and CD8, respectively, and these were used for enrichment analysis. As a result, we found that certain pathways were downregulated after TCZ treatment in both CD4+ and CD8+ T cells, including mechanistic target of rapamycin complex 1 (mTORC1) signaling, the IL-2 pathway, and IFN-related genes. Overall design: Examination between before and after tocilizumab treatment of CD4 and CD8 T cell in rheumatoid arthritis patients
Multi-dimensional analysis identified rheumatoid arthritis-driving pathway in human T cell.
Sex, Age, Specimen part, Disease, Subject
View SamplesBy comprehensive screening of long non-coding RNAs (lncRNAs) over mouse heart development, we have identified Tbx5 upstream antisense RNA (Tbx5ua). In order to understand its function, we produced Tbx5ua knock down ES cells by inserting triple bovine polyadenylation signal to the second exon of Tbx5ua. From the ES cells we made chimeric mouse embryos via tetraploid complementation assay. We conducted RNA-seq analysis on the WT and KD heart ventricles at E9.5 to further elucidate the lncRNA's molecular functions. Overall design: Single-end RNA-seq of total RNAs extracted from the ventricles of tetraploid chimeric mice generated from wildtype or Tbx5ua knockdown B6J ES cells
Important cardiac transcription factor genes are accompanied by bidirectional long non-coding RNAs.
Specimen part, Cell line, Subject
View SamplesEstrogen clearly prevents osteoporotic bone loss by attenuating bone resorption. The molecular basis of how this is accomplished, however, remains elusive. Here we report a critical role of osteoclastic ERa in mediating estrogen action on bone in females. We selectively ablated ERa in differentiated osteoclasts (ERa dOc/dOc). ERa dOc/dOc females, but not males, exhibited clear trabecular bone loss, similar to the osteoporotic bone phenotype in post-menopausal women. Recovery of bone loss by estrogen treatment of the ovariectomized ERa dOc/dOc females was ineffective in the trabecular areas of the long bones and lumbar vertebral bodies. Osteoclastic apoptosis, induced by estrogen, occurred simultaneously with up-regulation of Fas ligand (FasL) expression in intact trabecular bones of ERa +/+mice, but not in ERa dOc/dOc mice. ERa was also required for similar effects of estrogen and tamoxifen in cultured osteoclasts. These findings suggest that the osteoprotective actions of estrogen and SERMS are mediated at least in part through osteoclastic ERa in trabecular bone; and the life span of mature osteoclasts is regulated through activation of the Fas/FasL system.
Estrogen prevents bone loss via estrogen receptor alpha and induction of Fas ligand in osteoclasts.
Sex, Specimen part
View SamplesThe purpose of this experiment was to compare the gene expression pattern between wild-type and Trib1-deficient macrophages in response to LPS.
Enhanced TLR-mediated NF-IL6 dependent gene expression by Trib1 deficiency.
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