Klf4 overexpression effect on P0 rat retina
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ABSTRACT:
PROVIDER: PRJNA508207 | ENA |
REPOSITORIES: ENA
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Project description:Analysis of progenitor cells of P0 rats overexpressing Krüppel-like factor 4 (Klf4). Klf4 is a key transcriptional regulator of differentiation potential. Results provide insight into the role of Klf4 in the retina.
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Project description:Atheroprotective flow (e.g., pulsatile shear stress) and statins drastically induce the expression of krüppel-like factor 4 (KLF4) in vascular endothelial cells (ECs). We therefore investigated the role of KLF4 in EC function through comparing the transciptional profiling of human umbilical vein endothelial cells (HUVECs) that were infected with adenovirus overexpression KLF4 (Ad-KLF4) or with empty vector (Ad-null) control. Gene ontology analysis revealed that KLF4 not only regulates EC homeostasis through the upregulation of nitric oxide synthesis and vascular development, but also mediates response to lipid. Among the lipid responsive genes, KLF4 exhibited induction of cholesterol efflux and oxidation [i.e., liver X receptor (LXR) and cholesterol 25-hydroxylase (Ch25h)], while suppressing cholesterol biosynthesis [i.e., sterol regulatory element-binding protein 2 (SREBP2)].
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Project description:Various retinal disorder such as glaucomatous, retinal ischemia reperfusion, and traumatic optic neuropathy, are involved in the pathogenesis of neurodegeneration via glutamate exicitotoxicity. However, the proteomic characteristics and modulation of the neural-microenvironment with NMDA-induced neurodegeneration in retina and optic nerve remain partly understood. We established a protein sketch of NMDA-induced injury by comparing the proteomes of the PBS-operated, NMDA-operated and control groups. We carried out mass spectrometry-based label-free quantitative proteomics to investigate the exicitotoxic neurodegeneration mechanisms and identify key proteins that regulated neural cell death related signaling pathway in retina and optic nerve spatially. Using LC-MS/MS proteomics analysis, in total, we identified 3532 proteins in retina, 2593 proteins in optic nerve. According to Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), the protein changes and energy metabolism in retina and optic nerve tissue were comprehensively evaluated.
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Project description:Various retinal disorder such as glaucomatous, retinal ischemia reperfusion, and traumatic optic neuropathy, are involved in the pathogenesis of neurodegeneration via glutamate exicitotoxicity. However, the proteomic characteristics and modulation of the neural-microenvironment with NMDA-induced neurodegeneration in retina and optic nerve remain partly understood. We established a protein sketch of NMDA-induced injury by comparing the proteomes of the PBS-operated, NMDA-operated and control groups. We carried out mass spectrometry-based label-free quantitative proteomics to investigate the exicitotoxic neurodegeneration mechanisms and identify key proteins that regulated neural cell death related signaling pathway in retina and optic nerve spatially. Using LC-MS/MS proteomics analysis, in total, we identified 3532 proteins in retina, 2593 proteins in optic nerve. According to Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), the protein changes and energy metabolism in retina and optic nerve tissue were comprehensively evaluated.
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Project description:Klf4 is the zinc finger transcription factor indispensable for terminal maturation of epithelial tissues and part of group of proteins for the generation of pluripotent embryonic stem cells from differentiated tissues. No definitive in-vivo-function of Klf4 in the hematopoietic system has been established yet. We show here that Klf4 directly guides the transcriptional program for terminal differentiation of Ly-6Chigh monocytes. Klf4 suppresses transcripts of the interferon immune response and induces a proinflammatory cytokine transcriptional program. Concordantly, Klf4 hematopoietic deficiency in mice results in an enhanced Th1 but impaired Th17 immune response, and, consequently, those mice are resistant towards the induction of experimental autoimmune encephalitis (EAE). We here identify Klf4 is a transcription factor required for ontogenesis and function of Ly-6Chigh monocytes at the interface of innate and acquired immunity.
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