title: [New preparation method of C1 esterase for the dosage of its plasma inhibitor].
abstract: A purification method for C1 esterase is described. The final product significantly improved the sensitivity and the specificity of the enzymatic measurement of its plasma inhibitor C1-INH or alpha 2-neuraminoglycoprotein (alpha 2-NGP) by esterolysis of a synthetic substrate N-acetyl-L-tyrosine ethyl ester (ALTEe). A comparative study was done between the chromatographed C1 esterase and the native serum euglobulins: qualitative and quantitative determination of the serum contaminants, enzymatic activity measurement of C1-INH in normal subjects and in patients suffering from hereditary angioneurotic oedema (OANH) as well as in therapeutical C1-inhibitor concentrates.
mesh_terms: D000799:Angioedema / Q000097:blood; D002845:Chromatography; D003166:Complement Activating Enzymes / Q000302:isolation & purification*; D003174:Complement C1 Inactivator Proteins / Q000097:blood*; D003173:Complement C1s / Q000302:isolation & purification*; D006801:Humans; D008722:Methods
chemical_list: D003174:Complement C1 Inactivator Proteins; D003166:Complement Activating Enzymes; D003173:Complement C1s
vernacular_title: Nouveau mode de préparation de la c1 estérase pour le dosage de son inhibiteur plasmatique.