نتایج جستجو برای: reprogramming

تعداد نتایج: 12767  

ژورنال: دانشور پزشکی 2018
جاوری, آرش, رشیدی پور, عاطفه, فخر طه, معصومه,

Background and Objective: OCT4 is the most important transcription factor for reprogramming of somatic cells and maintenance of pluripotency. Moreover, it has recently been shown that loss of P53 or its mutations improve the efficiency of reprogramming. This study was designed to reprogram human adipose tissue-derived stem cells (ADSCs) by overexpression of OCT4 and inhibition of P53 expression...

Objective(s): Similar characteristics of molecular pathways between cellular reprogramming events and tumorigenesis have been accentuated in recent years. Reprogramming-related transcription factors, also known as Yamanaka factors (OCT4, SOX2, KLF4, and c-MYC), are also well-known oncogenes promoting cancer initiation, progression, and cellular transformation into cancer stem cells. Long non-co...

Objective(s): In some previous studies, the extract of embryonic carcinoma cells (ECCs) and embryonic stem cells (ESCs) have been used to reprogram somatic cells to more dedifferentiated state. The aim of this study was to investigate the effect of mouse ESCs extract on the expression of some pluripotency markers in human adipose tissue-derived stem cells (ADSCs). Materials and Methods: Human A...

Journal: :modares journal of medical sciences: pathobiology 2007
mahmoud reza rafiee hamid reza kalhor mohammad marandi seyed javad mowla

clinical application of embryonic stem (es) cells faces difficulties regarding tissue rejection as well as ethical limitations. one solution for these issues is to reprogram somatic cells by the injection of their nucleus into an enucleated oocyte or zygote. however, technical complications and ethical considerations have impeded the therapeutic implications of this technology. an approach whic...

2012
Lihong Xiao Liechi Zhang Ge Yang Honglin Zhu Yikun He

BACKGROUND Differentiated plant cells can retain the capacity to be reprogrammed into pluripotent stem cells during regeneration. This capacity is associated with both cell cycle reactivation and acquisition of specific cellular characters. However, the molecular mechanisms underlying the reprogramming of protoplasts into stem cells remain largely unknown. Protoplasts of the moss Physcomitrella...

Journal: :Human molecular genetics 2008
James A Byrne

The ability to reprogram somatic cell nuclei back into a pluripotent epigenetic state provides exciting new possibilities for in vitro research and cell transplantation therapy. There has been a significant quantity of recent research studies demonstrating that this epigenetic reprogramming process is possible with human and non-human primate somatic cells. In this review, various methodologies...

2009
Teruhisa Kawamura Jotaro Suzuki Yunyuan V. Wang Sergio Menendez Laura Batlle Morera Angel Raya Geoffrey M. Wahl Juan Carlos Izpisúa Belmonte

Reprogramming somatic cells to induced pluripotent stem (iPS) cells has been accomplished by expressing pluripotency factors and oncogenes, but the low frequency and tendency to induce malignant transformation compromise the clinical utility of this powerful approach. We address both issues by investigating the mechanisms limiting reprogramming efficiency in somatic cells. Here we show that rep...

2014
Bruno Di Stefano Samuel Collombet Thomas Graf

The reprogramming of somatic cells to induced pluripotent stem cells (iPSCs) is lengthy and inefficient. The development of a reprogramming system that allows rapid and synchronous reprogramming to pluripotency is imperative for understanding the mechanism of iPSC formation and for future therapeutic applications. We have recently reported that a short expression in mouse primary B cells of the...

Journal: :Regenerative medicine 2016
Chenxia Hu Lanjuan Li

Induced pluripotent stem cells (iPSCs) paved the way for research fields including cell therapy, drug screening, disease modeling and the mechanism of embryonic development. Although iPSC technology has been improved by various delivery systems, direct transduction and small molecule regulation, low reprogramming efficiency and genomic modification steps still inhibit its clinical use. Improvem...

2011
Jian Zhao Gang Pei

Stem cell research meets aging research. Recent findings indicate that cell reprogramming share some regulatory mechanisms with aging. Modulation of epigenetic enzymes, blockage of TGF-β, MEK, and GSK3b cascades, as well as avoidance of oxidation can enhance the generation of iPSCs [1, 2]. Interestingly, dysfunction of these pathways has been considered as a cause of aging [3]. Our latest study...

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