A monoclonal antibody D51 recognizes the transferrin-receptor structure

Area of Science:

• Immunology
• Cell Biology
• Hematology

Background:

• Monoclonal antibodies are crucial tools in cell surface antigen research.
• The transferrin receptor is implicated in cell proliferation and is a target in various diseases.

Purpose of the Study:

• To characterize a newly developed monoclonal antibody, D51, generated against human fetal thymus.
• To determine the binding specificity and molecular target of D51.

Main Methods:

• Immunization of mice against human fetal thymus to generate monoclonal antibodies.
• Flow cytometry to assess antibody binding to leukemic cell lines.
• Immunoprecipitation assays under reducing and non-reducing conditions to identify the target protein.
• Cross-competition assays using known transferrin receptor antibodies (OKT9).

Main Results:

• Monoclonal antibody D51 binds to a range of leukemic cells.
• D51 immunoprecipitates a protein with a molecular weight of 90 kDa under reducing conditions and 180 kDa under non-reducing conditions, suggesting a dimeric structure.
• Consecutive immunoprecipitation experiments confirm that D51 recognizes the transferrin receptor, similar to mAb OKT9.

Conclusions:

• Monoclonal antibody D51 is a valuable reagent for identifying the transferrin receptor on leukemic cells.
• The findings support the dimeric structure of the transferrin receptor.
• D51 provides an additional tool for studying transferrin receptor expression in hematological malignancies.