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Evaluation of factor VII antigen in factor VII congenital deficiencies with a new ELISA assay
Author(s) -
Tirindelli M. C.,
Mariani G.,
Mazzucconi M. G.,
Iacopino G.,
Carbonaro M.,
Ghirardini A.,
Motta M.,
Mandelli F.
Publication year - 1987
Publication title -
american journal of hematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.456
H-Index - 105
eISSN - 1096-8652
pISSN - 0361-8609
DOI - 10.1002/ajh.2830260404
Subject(s) - antigen , medicine , factor (programming language) , immunology , computer science , programming language
An evaluation of a new Enzyme Linked Immunosorbent Assay (ELISA) factor VII:Ag assay in factor VII congenital deficiencies was carried out. This assay was compared to factor VII:C assay and the Inhibitor Neutralization Assay (INA) for factor VII:Ag, both in normals and F VII‐deficient patients. The correlations between ELISA F VII:Ag and VII:C, as well as the one between INA F VII:Ag and VII:C, were good ( r = .86 and .81, respectively). The correlation between the two immunologic methods of assay in normals was fairly good ( r = 0.73, P < 0.001); whereas in mild F VII deficiencies (heterozygotes for F VII deficiencies), the two methods correlated very well ( r = .96). In the severe deficiencies, ELISA F VII:Ag assay allowed the evaluation of F VII protein levels below 1 u/dl. The sensitivities of the INA and ELISA assays were evaluated by creating artificially prepared plasmas containing serial amounts of purified F VII: INA was unable to pick up F VII protein levels lower than 75 ng/ml, whereas the ELISA assay could detect up to 5 ng of F VII.