title: Serum concentrations of SP1 (pregnancy-specific-beta1-glycoprotein) in healthy, nonpregnant individuals, and in patients with nontrophoblastic malignant neoplasms.
abstract: The presence of [SP1 (PSbetaG)] in healthy men and nonpregnant women was demonstrated with a highly sensitive and specific radioimmunoassay. Detectable serum levels (1-5 ng/ml) were found in 37 of 69 individuals. Concentrations of 3-10 ng/ml could be detected in 80% of the patients with a variety of nontrophoblastic malignant neoplasms and in 17% of patients with breast cancer. In 11% of these patients the serum level was raised to 10-50 ng/ml. SP1 was also found in extracts of fresh tumor tissue. In 27% of these specimens 3-15 ng/ml SP1 were found. Serum SP1 levels that were elevated before surgery fell to the normal range within a few days after tumor removal. SP1 might thus be regarded as a marker for various nontrophoblastic cancers and as such might become important as a guide to treatment.
mesh_terms: D001609:Beta-Globulins / Q000097:blood*; D001943:Breast Neoplasms / Q000097:blood / Q000601:surgery; D005260:Female; D006023:Glycoproteins / Q000097:blood; D006801:Humans; D008297:Male; D009369:Neoplasms / Q000097:blood / Q000601:surgery; D011247:Pregnancy; D012016:Reference Values
chemical_list: D001609:Beta-Globulins; D006023:Glycoproteins