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Primordial Germ Cell Cryopreservation and Revival of Drosophila Strains

Primordial Germ Cell Cryopreservation and Revival of Drosophila Strains

Published on: December 1, 2023

A method for cryopreserving chicken primordial germ cells.

D T Moore¹, P H Purdy, H D Blackburn

¹National Animal Germplasm Program, National Center for Genetic Resources Preservation, Fort Collins, CO 80521, USA.

Poultry Science

|October 3, 2006

Summary

Chicken primordial germ cells (PGC) can be preserved for long-term storage using a novel cryopreservation method. The optimal treatment involved 10% ethylene glycol (EG) with 10 embryos per straw, yielding the highest number of viable PGC.

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Area of Science:

Reproductive Biology
Cell Biology
Cryobiology

Background:

Preserving avian germ cells is crucial for genetic resource conservation and biotechnology.
Chicken primordial germ cells (PGC) are essential for poultry breeding and research.
Developing effective cryopreservation methods for PGC is a significant challenge.

Purpose of the Study:

To establish and optimize a method for long-term cryopreservation of chicken primordial germ cells (PGC).
To evaluate the efficacy of different cryoprotectants and concentrations for PGC survival.
To determine the optimal conditions for freezing and storing PGC in liquid nitrogen.

Main Methods:

Harvesting gonads from stage 27 chick embryos and pooling them.
Freezing gonadal cells in various cryoprotectant solutions, including dimethyl sulfoxide (DMSO) and ethylene glycol (EG) at different concentrations.

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Utilizing a controlled-rate freezer and plunging into liquid nitrogen for storage.

Analyzing post-thaw PGC viability using flow cytometry and specific PGC markers (Stage-Specific Embryonic Antigen-1).

Main Results:

Cryopreservation of chicken PGC in liquid nitrogen was successfully achieved.
The most effective cryoprotective treatment was 10% ethylene glycol (EG) when using gonads from 10 embryos per straw.
This optimal condition resulted in the highest number (183.6 +/- 28.4) and percentage (80.6%) of viable PGC post-thaw.
This treatment was significantly superior to other cryoprotectants and control groups.

Conclusions:

A robust method for cryopreserving chicken PGC has been established.
10% ethylene glycol (EG) is identified as the most effective cryoprotectant for chicken PGC preservation.
This technique enables long-term storage of viable chicken PGC, supporting future applications in avian biology and conservation.