Some immunological investigations on antithrombin III 'Budapest'

Area of Science:

• Biochemistry
• Immunology
• Hematology

Background:

• Antithrombin III (ATIII) is a critical protein in the blood coagulation cascade.
• Deficiency or dysfunction of ATIII can lead to thrombotic disorders.
• The 'Budapest' variant represents a specific molecular abnormality of ATIII.

Purpose of the Study:

• To characterize the molecular properties of the abnormal antithrombin III 'Budapest' variant.
• To investigate the electrophoretic mobility and antigenic characteristics of the ATIII variant.
• To assess the presence and distribution of the ATIII variant in a patient and their offspring.

Main Methods:

• One-dimensional and two-dimensional immunoelectrophoresis were employed.
• Plasma samples from a patient and their son were analyzed.
• Commercial antibodies specific to alpha2-antithrombin III (alpha2-AtIII) were used.

Main Results:

• The patient's plasma exhibited two alpha2-AtIII antigen peaks with distinct electrophoretic mobilities.
• The variant alpha2-AtIII showed increased electrophoretic mobility and was antigenically deficient.
• The patient's son also possessed two alpha2-AtIII populations, one normal and one with increased mobility.

Conclusions:

• The antithrombin III 'Budapest' variant is characterized by altered electrophoretic mobility and antigenic deficiency.
• This molecular abnormality affects the concentration and distribution of ATIII in affected individuals.
• Immunoelectrophoresis is effective in identifying and characterizing abnormal ATIII variants.