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Related Concept Videos

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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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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: Aug 3, 2025

Transnuclear Mice with Pre-defined T Cell Receptor Specificities Against Toxoplasma gondii Obtained Via SCNT
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Somatic Cell Nuclear Transfer Using Freeze-Dried Protaminized Donor Nuclei.

Luca Palazzese1, Marta Czernik1,2, Kazutsugu Matsukawa3

  • 1Institute of Genetics and Animal Biotechnology of the Polish Academy of Sciences, Jastrzebiec, Poland.

Methods in Molecular Biology (Clifton, N.J.)
|April 11, 2023
PubMed
Summary

Storing freeze-dried somatic cells using protamine treatment enables somatic cell nuclear transfer (SCNT) for conservation. This novel method enhances cell stability and reprogramming efficiency for endangered species multiplication.

Keywords:
BiobankingCloningEndangered speciesLyophilizationProtamine

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Area of Science:

  • Reproductive biology
  • Cellular reprogramming
  • Conservation biotechnology

Background:

  • Somatic cell nuclear transfer (SCNT) is crucial for cloning elite genotypes and conserving endangered species.
  • Low efficiency of SCNT and challenges in long-term somatic cell preservation hinder its application.
  • Protamine treatment enhances sperm genome stability and may improve somatic cell reprogramming.

Purpose of the Study:

  • To develop a cost-effective protocol for preserving somatic cells for SCNT.
  • To improve the efficiency of SCNT using protamine-treated, lyophilized somatic cells.
  • To establish a method for creating biobanks of cryopreserved somatic cells from threatened animals.

Main Methods:

  • Protamine treatment of somatic cells to enhance genome stability.
  • Lyophilization (freeze-drying) of protamine-treated somatic cells for preservation.
  • Application of preserved somatic cells in SCNT to generate blastocysts.

Main Results:

  • Demonstrated successful blastocyst generation from freeze-dried somatic cells via SCNT.
  • Combined protamine treatment and lyophilization protocols for enhanced cell preservation.
  • Established a comprehensive protocol for protaminization, lyophilization, and SCNT.

Conclusions:

  • Protamine-treated, lyophilized somatic cells offer a viable, low-cost method for SCNT.
  • This approach can significantly aid in establishing biobanks for conservation efforts.
  • The protocol holds promise for improving the multiplication of elite genotypes and endangered animals.