Human immune interferon gene is located on chromosome 12

Area of Science:

• Genetics
• Molecular Biology
• Immunology

Background:

• Interferon-gamma (IFN-gamma) is a crucial cytokine in the immune response.
• Accurate chromosomal localization of cytokine genes is essential for understanding gene regulation and potential genetic disorders.

Purpose of the Study:

• To determine the chromosomal location of the human immune interferon (IFN-gamma) gene.
• To refine the localization of the IFN-gamma gene to a specific region on a human chromosome.

Main Methods:

• Utilized a cDNA clone (plasmid p69) of the human IFN-gamma gene.
• Employed human-rodent somatic cell hybrids to analyze human chromosome content.
• Performed Southern blot analysis with EcoRI-digested genomic DNA to detect human-specific DNA fragments.
• Correlated the presence of human chromosomes in hybrids with specific DNA fragment patterns.

Main Results:

• Southern blot analysis of 37 hybrid cell lines revealed that the IFN-gamma gene is located on human chromosome 12.
• A hybrid cell line containing a partial chromosome 12 further localized the IFN-gamma gene to the 12p1205-qter region.

Conclusions:

• The human IFN-gamma gene is definitively assigned to chromosome 12.
• The precise location of the IFN-gamma gene within the 12p1205-qter region provides a basis for further genetic studies.