MAP kinases are integral to the mechanisms by which cells respond to a wide variety of environmental stresses. In Caenorhabditis elegans, the KGB-1 JNK signaling pathway regulates the response to heavy metal stress. The deletion mutants of this cascade show hypersensitivity to heavy metals like copper or cadmium. However, factors that function downstream of KGB-1 pathway are not well characterized.
The Caenorhabditis elegans JNK signaling pathway activates expression of stress response genes by derepressing the Fos/HDAC repressor complex.
Age
View SamplesRecent studies indicated that the differentiation tendency of pluripotent stem cells (PSCs) was affected by a certain small molecule treatment. We found the combination of small molecules that bringed out the differentiation potentials of PSCs, and defined such state of PSC as CTraS.
Escape from Pluripotency via Inhibition of TGF-β/BMP and Activation of Wnt Signaling Accelerates Differentiation and Aging in hPSC Progeny Cells.
Specimen part, Subject
View SamplesWe established two clones of induced pluripotent stem cells (iPSC) with the presenilin 2 mutation, N141 (PS2-1 iPSC and PS2-2 iPSC) by retroviral transduction of primary human fibroblasts. To show the similarity among 201B7 iPSC, PD01-25 iPSC(Sporadic Parkinson's disease patient derived iPSC), PS2-1 iPSC, PS2-2 iPSC, this experiment was designed.
Modeling familial Alzheimer's disease with induced pluripotent stem cells.
Specimen part, Disease, Disease stage, Cell line
View SamplesVSMC-specific MT1-MMP gene targeting in APOE-null mice promotes atherosclerosis and iliac artery aneurysm formation. To determine the MT1-MMP-dependent regulation of VSMC function, whole-genome transcriptomes of wild-type and MT1-MMP-null APOE-null VSMCs were determined.
Membrane-Tethered Metalloproteinase Expressed by Vascular Smooth Muscle Cells Limits the Progression of Proliferative Atherosclerotic Lesions.
Specimen part
View SamplesInduced pluripotent stem (iPS) cells give rise to neural stem cells, which are applicable for therapeutic transplantation in treatment of neural diseases. However, generation of neural stem cells from iPS cells requires a careful selection of safe iPS clones. We sought to determine whether direct induction of neural stem cells from partially reprogrammed somatic cells is able to generate safer cells rapidly. We have successfully established direct induction system from fibroblast to neural stem cells. To characterize these directly induced neural stem cells, Gene expression profiles were compared with iPS cell or ES cell-derived neurosphere. We used affymetrix microarrays to compare the global gene expression of neurospheres prepared several method.
Neural stem cells directly differentiated from partially reprogrammed fibroblasts rapidly acquire gliogenic competency.
Specimen part
View SamplesRecent reports have emphasized the pitfalls of iPSC technology including the potential for immunogenicity of transplanted cells. It is serious safety-related concern for iPSC-based cell therapy. However, preclinical data supporting the safety and efficacy of iPSCs are also accumulating. To address the concern of immunogenicity of ESCs/iPSCs or ESCs/iPSCs-derived neurospheres, global gene expression profiles were compared between undifferentiated mouse ESCs (EB3 line), mouse iPSCs (38C2 line), and ESC/iPSC-derived neurosphere and mouse primary culture of neurosphere obtained from fetal mouse ganglionic eminence. Mouse adult sklin fibroblast was used as a control.
Neural stem cells directly differentiated from partially reprogrammed fibroblasts rapidly acquire gliogenic competency.
Specimen part
View SamplesWe established induced pluripotent stem cells (iPSC) from centrenarians by retroviral transduction of primary human fibroblasts. To show the similarity between 201B7 iPSC and 100-1 #16 iPSC (induced pluripotent stem cells from centenarian), this experiment was designed.
Establishment of induced pluripotent stem cells from centenarians for neurodegenerative disease research.
Specimen part, Cell line
View SamplesCHARGE syndrome is caused by heterozygous mutations in a chromatin remodeler CHD7 and characterized by a set of malformations historically postulated to arise from defects in the neural crest formation during embryogenesis. To better delineate neural crest defects in CHARGE syndrome, we generated induced pluripotent stem cells (iPSCs) from two patients with typical syndrome manifestations, and characterized neural crest cells differentiated in vitro from these iPSCs (iPSC-NCCs). We found that expression of genes associated with cell migration was altered in CHARGE iPSC-NCCs as compared to control iPSC-NCCs. Consistently, CHARGE iPSC-NCCs showed defective delamination, migration and motility in vitro, and their transplantation in ovo revealed overall defective migratory activity in the chick embryo. Altogether, our results support the historical inference that CHARGE syndrome patients have defects in neural crest migration and provide the first successful application of patient-derived iPSCs in modeling craniofacial disorders.
CHARGE syndrome modeling using patient-iPSCs reveals defective migration of neural crest cells harboring CHD7 mutations.
No sample metadata fields
View SamplesRecent studies indicated that iPSCs retain an epigenetic memory relating to their cell of origin that affected their properties and their functions as PSCs.
Modeling neurological diseases with induced pluripotent cells reprogrammed from immortalized lymphoblastoid cell lines.
Specimen part, Subject
View SamplesTo assess RNA regulation in FALS for gene expression and alternative processing of RNA in the motor neuron precurssors (MPCs)
Establishment of In Vitro FUS-Associated Familial Amyotrophic Lateral Sclerosis Model Using Human Induced Pluripotent Stem Cells.
Specimen part
View Samples