Cytoplasmic fusion between an enlarged embryonic stem cell and a somatic cell using a microtunnel device

Area of Science:

• Cell Biology
• Stem Cell Research
• Reproductive Biology

Background:

• Somatic cell reprogramming into induced pluripotent stem (iPS) cells was previously achieved through fusion with embryonic stem (ES) cells.
• Cell fusion can result in tetraploid cells, and methods to avoid nuclear fusion, such as cytoplasmic fusion via microtunnel devices, have been explored.

Purpose of the Study:

• To overcome the challenge of ES cell size limitations in microtunnel-based cytoplasmic fusion with somatic cells.
• To develop an improved method for iPS cell generation that avoids gene transfection.

Main Methods:

• Embryonic stem (ES) cells were enlarged using demecolcine (DC), a colchicine derivative.
• Cytoplasmic fusion was induced between enlarged ES cells and somatic cells using a microtunnel device.

Main Results:

• Demecolcine (DC) successfully enlarged ES cells while preserving their stemness.
• Cytoplasmic fusion was achieved between enlarged ES cells and somatic cells within the microtunnel device.

Conclusions:

• The developed method of enlarging ES cells with demecolcine facilitates cytoplasmic fusion for iPS cell preparation.
• This approach offers a potential alternative for generating iPS cells without the need for gene transfection.