A method for preparing chromosomes from peripheral blood of the mouse

Area of Science:

• Cytogenetics
• Mammalian Cell Culture
• Molecular Biology

Background:

• Accurate chromosome preparation is crucial for genetic studies.
• Existing methods for mouse peripheral blood chromosome analysis can be labor-intensive and variable.

Purpose of the Study:

• To describe a modified, reproducible procedure for metaphase chromosome preparation from mouse peripheral blood.
• To optimize cell culture conditions for enhanced yield and quality of chromosome spreads.

Main Methods:

• Isolation of white blood cells using Ficoll-Hypaque density gradient centrifugation.
• Controlled seeding of leukocyte cultures for optimal phytohemagglutinin (PHA) stimulation over 72 hours without media changes.
• Visual monitoring of cell growth to determine optimal harvest time, avoiding non-productive cultures.

Main Results:

• The modified procedure is highly reproducible.
• A final 0.5 ml fixed cell suspension consistently yields 50-75 quality metaphase spreads per drop.
• Optimized culture conditions improve efficiency and reduce unnecessary harvests.

Conclusions:

• The described modified procedure offers a reliable and efficient method for obtaining high-quality metaphase chromosome spreads from mouse peripheral blood.
• This technique is valuable for genetic research requiring accurate chromosomal analysis in mice.