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Introduction to Nuclear Reprogramming

Introduction 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...

Methods of Nuclear Reprogramming

Methods 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.

Somatic to iPS Cell Reprogramming

Somatic 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...

Chromatin Modification in iPS Cells

Chromatin Modification in iPS Cells

Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...

Nucleosome Remodeling

Nucleosome Remodeling

Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...

Forced Transdifferentiation

Forced 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...

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Updated: Jun 27, 2026

Application of RNAi and Heat-shock-induced Transcription Factor Expression to Reprogram Germ Cells to Neurons in C. elegans

Application of RNAi and Heat-shock-induced Transcription Factor Expression to Reprogram Germ Cells to Neurons in C. elegans

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La reprogramación nuclear en las células.

J B Gurdon¹, D A Melton

¹Wellcome Trust/Cancer Research UK Gurdon Institute and Department of Zoology, University of Cambridge, Cambridge CB2 12N, UK.

Science (New York, N.Y.)

|December 20, 2008

Resumen

Este resumen es generado por máquina.

La reprogramación nuclear convierte un tipo de célula en otro, lo que permite terapias de reemplazo celular. Esta tecnología ofrece el potencial para generar células específicas del paciente sin rechazo inmune, avanzando la medicina regenerativa.

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Área de la Ciencia:

Biología celular Biología celular.
Biología del desarrollo Biología del desarrollo.
Genética La genética.

Sus antecedentes:

La reprogramación nuclear implica alterar la expresión génica de una célula para que se parezca a un tipo de célula no relacionado.
Las primeras pruebas surgieron de la clonación de ranas, con avances que incluyen la transferencia nuclear de células somáticas de mamíferos y la reprogramación directa.
Este proceso permite la derivación de células especializadas de tejidos accesibles dentro del mismo individuo.

Objetivo del estudio:

Para proporcionar antecedentes sobre las técnicas de reprogramación nuclear.
Discutir los mecanismos y la eficiencia de la reprogramación.
Para comentar sobre las perspectivas futuras en la investigación de reprogramación nuclear.

Principales métodos:

La célula somática transfiere el núcleo de la célula somática.
La fusión celular es la fusión celular.
La expresión génica ectópica para la pluripotencia inducida.
La reprogramación directa es la reprogramación directa.

Principales resultados:

Derivación exitosa de células especializadas (por ejemplo, neuronas) de diferentes tipos de células (por ejemplo, células de la piel).
Potencial para el trasplante de células autólogas, evitando el rechazo inmune.
Ha demostrado la viabilidad de generar diversos tipos de células a través de la reprogramación.

Conclusiones:

La reprogramación nuclear es muy prometedora para la medicina regenerativa y las terapias basadas en células.
La investigación adicional sobre los mecanismos y la eficiencia es crucial para las aplicaciones clínicas.
La capacidad de generar células específicas del paciente podría revolucionar los tratamientos para diversas enfermedades.