Chromosome tracking in fused cells by single nucleotide polymorphisms

Area of Science:

• Genetics
• Molecular Biology
• Cell Biology

Background:

• Single nucleotide polymorphisms (SNPs) are variations in DNA sequences.
• Inbred mouse strains possess unique SNP profiles.
• Cell fusion experiments require methods to verify hybrid cell formation.

Purpose of the Study:

• To describe a method for detecting strain-specific SNPs in mouse cell hybrids.
• To validate cell fusion success using SNP analysis.
• To identify chromosomes from parental genotypes in hybrid cell lines.

Main Methods:

• Fusion of DBA/2J female somatic cells with 129/Ola male embryonic stem (ES) cells.
• Selection and detection of SNPs across all 23 murine chromosomes in resulting cell hybrids.
• Comparison of SNP profiles between parental cells and hybrid cells.

Main Results:

• Parental cells exhibited single strain-specific alleles.
• Tetraploid fusion hybrid cells contained alleles from both DBA/2J and 129/Ola mice.
• Hybrid cells retained both parental nuclei and autosomes, indicating successful fusion and genetic contribution.

Conclusions:

• SNP detection is a reliable complementary method for monitoring cell fusion success.
• This approach facilitates the identification of chromosomes from both parental genotypes in hybrid cell lines.
• The described method aids in characterizing genetic integrity of fusion products.