نتایج جستجو برای: nanog
تعداد نتایج: 2396 فیلتر نتایج به سال:
The transcriptional activators Oct4, Sox2, and Nanog cooperate with a wide array of cofactors to orchestrate an embryonic stem (ES) cell-specific gene expression program that forms the molecular basis of pluripotency. Here, we report using an unbiased in vitro transcription-biochemical complementation assay to discover a multisubunit stem cell coactivator complex (SCC) that is selectively requi...
Proper regulation of chromatin structure is necessary for the maintenance of cell type-specific gene expression patterns. The embryonic stem cell (ESC) expression pattern governs self-renewal and pluripotency. Here, we present an RNAi screen in mouse ESCs of 1008 loci encoding chromatin proteins. We identified 68 proteins that exhibit diverse phenotypes upon knockdown (KD), including seven subu...
سابقه و هدف: اگرچه امروزه IVF به عنوان یک تکنیک پرکاربرد در درمان ناباروری میباشد، اما مطابق مطالعات صورت گرفته، استرس ایجاد شده به واسطهی تغییرات اسمزی، اکسیژن، دما و pH در شرایط خارج از رحم میتواند باعث تغییرات مورفولوژیکی، ژنتیکی و اپیژنتیکی در جنینهای برونتنی نسبت به حالت درونتنی گردد. هدف از این مطالعه، بررسی تاثیر IVF بر کیفیت جنینها از طریق ارزیابی نرخ زندهمانی و رشد و همچنین...
mordial germ cells (PGCs) in mice and axolotls, we propose that the deletion of Nanog in species often employed as experimental models, such as frogs and teleosts (Zebrafish; Danio rerio), has been compensated by the evolution of predetermined germ cells in these organisms. Our data highlights Nanog as a major component of the gene regulatory network that governs early development in the major ...
The development of in vitro models, which accurately recapitulate early embryonic development, is one the fundamental challenges stem cell research. Most currently employed approaches involve culture cells (ESCs) on 2D surfaces. However, monolayer nature these cultures does not permit to grow and proliferate realistic 3D microenvironments, as an embryo. In this paper, novel synthetic microstruc...
Transcription factors NANOG, OCT4, and SOX2 regulate self-renewal and pluripotency in human embryonic stem (hES) cells; however, their expression profiles during early differentiation of hES cells are unclear. In this study, we used multiparameter flow cytometric assay to detect all three transcription factors (NANOG, OCT4, and SOX2) simultaneously at single cell level and monitored the changes...
Pluripotent human embryonic stem cells (hESCs) have the distinguishing feature of innate capacity to allow indefinite self-renewal. This attribute continues until specific constraints or restrictions, such as DNA methylation, are imposed on the genome, usually accompanied by differentiation. With the aim of utilizing DNA methylation as a sign of early differentiation, we probed the genomic regi...
Cryopreservation of mesenchymal stem cells from amniotic fluid is of clinical importance, as these cells can be harvested during the prenatal period and stored for use in treatments. We examined the behavior of mesenchymal stem cells from human amniotic fluid in culture that had been subjected to cryopreservation. We assessed chromosomal stability through karyotype analysis, determined whe...
Tumors adapt their phenotypes during growth and in response to therapies through dynamic changes in cellular processes. Connexin proteins enable such dynamic changes during development, and their dysregulation leads to disease states. The gap junction communication channels formed by connexins have been reported to exhibit tumor-suppressive functions, including in triple-negative breast cancer ...
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