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Updated: Jun 14, 2026
09:38
Direct Reprogramming of Mouse Fibroblasts into Melanocytes
Published on: August 27, 2021
Direct reprogramming 101.
1Center for iPS cell Research and Application, Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan. takahash@cira.kyoto-u.ac.jp
Development, Growth & Differentiation
|March 20, 2010
Summary
Direct reprogramming converts somatic cells to pluripotent cells using four transcription factors. This technology aids in understanding diseases and developing new therapies for cell transplantation.
Area of Science:
- * Stem cell biology and regenerative medicine.
- * Molecular biology and gene regulation.
Background:
- * Direct reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) has been achieved using specific transcription factors.
- * Understanding disease mechanisms and developing novel therapeutics are key goals in modern medicine.
- * Advances in technology are crucial for producing clinical-grade cells for transplantation therapies.
Purpose of the Study:
- * To review the foundational knowledge and recent advancements in cellular reprogramming.
- * To highlight the role of transcription factors and augmenting agents in improving reprogramming efficiency.
- * To introduce key findings and concepts in the field of pluripotency and nuclear reprogramming.
Main Methods:
- * Review of scientific literature on pluripotency and nuclear reprogramming.
- * Analysis of studies utilizing transcription factors for cell reprogramming.
- * Examination of screening methods for augmenting agents like small-molecules.
Main Results:
- * Four key transcription factors are sufficient for direct reprogramming of somatic cells to a pluripotent state.
- * Small-molecule augmenting agents have been identified to enhance reprogramming efficiency.
- * Embryonic stem cell research has elucidated molecular mechanisms underlying reprogramming.
Conclusions:
- * Direct reprogramming offers a powerful tool for disease modeling and drug discovery.
- * Continued research into reprogramming mechanisms will drive advancements in regenerative medicine.
- * The field has progressed significantly due to accumulated knowledge and technological innovation.
Related Concept Videos
01:14Introduction to Nuclear Reprogramming
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...
01:24Methods of Nuclear Reprogramming
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 injury repair.
01:29Somatic to iPS Cell Reprogramming
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 for this...
01:28Forced Transdifferentiation
Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
Artificial transdifferentiation occurs...
Artificial transdifferentiation occurs...
01:13Induced Pluripotent Stem Cells
Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore called induced pluripotent stem...