title: The effect of an acute phase response or pregnancy on plasma alpha-1-antitrypsin concentrations in persons with various S and Z phenotypes.
abstract: We have investigated the effect of an acute phase response on the plasma concentrations of alpha-1-antitrypsin (alpha 1 AT) in various phenotypes. Ninety seven per cent of patients with an acute phase response or pregnant patients who had an MS, MZ, S or SZ phenotype had alpha 1 AT levels within or above the reference interval of patients with the M phenotype who did not have an acute phase response. Thus a 'normal' concentration of plasma alpha 1 AT cannot be used to exclude even an S or SZ phenotype if the patient is pregnant or has an acute phase response.
mesh_terms: D000210:Acute-Phase Reaction / Q000097:blood*; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D007249:Inflammation / Q000097:blood*; D007525:Isoelectric Focusing; D010641:Phenotype; D011247:Pregnancy / Q000097:blood*; D000515:alpha 1-Antitrypsin / Q000032:analysis*
chemical_list: D000515:alpha 1-Antitrypsin