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Related Concept Videos

Methods of Nuclear Reprogramming01:24

Methods of Nuclear Reprogramming

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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Somatic to iPS Cell Reprogramming01:29

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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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Cancer Stem Cells and Tumor Maintenance02:40

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Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
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iPS Cell Differentiation01:22

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The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Stem Cell Culture01:17

Stem Cell Culture

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Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and...
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Introduction to Nuclear Reprogramming01:14

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Nuclear reprogramming is the process of switching gene expression of one cell type to that of another cell type, usually from a differentiated cell state to an undifferentiated cell state. Differentiation occurs during processes such as development and morphogenesis, tissue regeneration, and malignancy. Cells can also be artificially induced to reprogram their gene expression by techniques such as nuclear transfer, induced pluripotency, and cell fusion. Such techniques have many applications in...
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Related Experiment Video

Updated: Apr 14, 2026

Engineering Oncogenic Heterozygous Gain-of-Function Mutations in Human Hematopoietic Stem and Progenitor Cells
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Conditionally Reprogrammed Cells Preserve Cellular Diversity and Permit Genetic Manipulation: Implications for Cancer

Shuang Fang1, Guangzhao Li1, Dilber Nurmurmet2

  • 1Department of Pathology, Georgetown University Medical Center, Washington, D.C. 20057, USA.

Serican Journal of Medicine
|April 13, 2026
PubMed
Summary

Conditionally Reprogrammed Cells (CRCs) can be genetically modified and stably express genes. This breakthrough enables advanced applications in regenerative medicine, disease modeling, and personalized therapies using genetically engineered CRCs.

Keywords:
cancer heterogeneityconditionally reprogrammed cells (CRC)patient-derived cell modelstissue repair

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Area of Science:

  • Cell Biology
  • Regenerative Medicine
  • Cancer Research

Background:

  • Previous studies established Conditionally Reprogrammed Cells (CRCs) for indefinite in vitro proliferation of normal and tumor epithelial cells.
  • CRCs offer promise for regenerative medicine and personalized therapies without exogenous gene transduction.

Purpose of the Study:

  • To investigate the genetic manipulability and stable gene expression of CRCs.
  • To explore CRC potential for modeling tissue development, regeneration, and tumor heterogeneity.
  • To optimize the CRC platform for translational applications and demonstrate gene knockdown capabilities.

Main Methods:

  • Lentiviral transduction of GFP into human foreskin keratinocytes (HFKs) and tumor-derived CRCs.
  • Co-culture systems with GFP-labeled CRCs and tumor-derived CRCs to assess colony formation and heterogeneity.
  • Assessment of human fibroblasts as feeder layers and gene knockdown using shRNA lentiviral vectors.

Main Results:

  • Stable GFP expression was achieved and maintained in HFK-CRCs and tumor-derived CRCs through multiple passages and freeze-thaw cycles.
  • CRCs from different individuals formed heterogeneous colonies, indicating potential for modeling complex biological systems.
  • Successful gene knockdown of p53 and HPV16 E6 was demonstrated in cervical cancer-derived CRCs.

Conclusions:

  • The CRC method supports stable genetic manipulation, including gene expression and knockdown.
  • Genetically modified CRCs are suitable for mechanistic studies, disease modeling, and developing cell-based therapeutic strategies.
  • Optimized CRC platforms using human fibroblasts show promise for translational applications in regenerative medicine and cancer research.