Assay of antigens with anti-lung cancer McAb 3C_9 and preliminary evaluation of serological diagnosis for lung cancer / 第三军医大学学报

ABSTRACT

The antigens(3C9Ag)which could be recognized by the anti-lung cancer monoclonal antibody 3Ca were assayed with BA-ELISA immunobinding inhibition test in 50 lung cancer patients,21 patients with non-cancerous pulmonary diseases and 40 normal subjects.Meanwhile radioimmunoassay was used to determine serum CEA.It was found that the sensitivity,specificity and accuracy for 3C9Ag to diagnose lung cancer were 76%,90.5% and 80.3% respectively.Much higher positive rates could be found in NSCLC patients and in those with stage Ⅱ or Ⅲ cancer.3CsAg was superior to CEA in its sensitivity and accurracy.Combined assay with 3C9Ag and CEA could increase the positive rate.