Anti-inner factor antibody
The anti-inner antibody is an autoantibody against an internal factor and belongs to IgG. Anti-internal factor antibodies can be present in the patient's serum, gastric juice and saliva. Anti-internal factor antibodies can cause gastric mucosal atrophy, inhibit the activity of internal factors and decrease the concentration of vitamin B12 in the blood, leading to pernicious anemia and neurological symptoms. Determination of anti-internal factor antibodies may be helpful in the diagnosis of pernicious anemia. The internal factor is a glycoprotein that binds to vitamin B12 to form a complex that binds to the receptor in the ileal mucosa and is absorbed. Anti-internal factors (AIFA) are divided into two types: type I is a blocking antibody that inhibits the binding of endogenous factors to vitamin B12; type II is a binding antibody that binds to the inner factor-vitamin B12 complex and blocks the complex and ileal mucosal receptors. Attachment.Basic Information
Specialist classification: growth and development check classification: immunological examination
Applicable gender: whether men and women apply fasting: not fastingAnalysis results:
Positive is seen in pernicious anemia.
negative. The literature reports that the positive rate of normal people is <1%.Clinical significance
Positive is seen in pernicious anemia. In addition, hyperthyroidism, diabetes, chronic thyroiditis, iron deficiency anemia can sometimes be positive.Precautions
Anti-internal factor antibodies are commonly determined by ELISA. ELISA is a highly sensitive test technique that combines the specific reaction of antigens and antibodies with the efficient catalysis of enzymes on substrates based on immunological reactions. The reaction of the antigen and the antibody is carried out in a well of a solid phase carrier, a polystyrene microtiter plate, and after each reagent is added, the excess free reactant can be removed by washing to ensure the specificity of the test result. stability.Inspection process
Determined by the RIA method.Not suitable for the crowd
There are no taboos.Adverse reactions and risks
There are no related complications and hazards.