Human B-blast specific target determinants in CML: a family study

Area of Science:

• Immunogenetics
• Molecular Biology
• Human Leukocyte Antigens (HLA)

Background:

• Previous studies identified human B blast specific target determinants on B lymphoblasts.
• These determinants showed association with HLA-DR gene products in population studies.

Purpose of the Study:

• To investigate the genetic basis and inheritance pattern of human B blast specific target determinants.
• To determine the chromosomal location of the genes encoding these determinants.

Main Methods:

• Analysis of B blast target determinants in 4 selected families.
• Utilizing families with known HLA-B/D, DR, and HLA-D, DR/GLO recombinations.
• Employing in vitro generated cytotoxic T lymphocytes (CTLs) to identify target determinants on B lymphoblasts.

Main Results:

• B blast target determinants segregate in a codominant Mendelian manner with HLA haplotypes.
• Genetic mapping indicates the determinants are coded by loci within the HLA-D region, specifically between HLA-B and GLO.

Conclusions:

• Human B blast specific target determinants are genetically controlled by loci in the HLA-D region.
• The inheritance pattern is consistent with codominant Mendelian segregation.
• This finding refines the understanding of immune response gene localization within the HLA complex.