morphine and Liver-Neoplasms

Antigenic reactivities of 4 purified CEA preparations and 4 different CEA-related normal antigens (NCA from lungs, NCA-2 from meconium, and NFA-1 and NFA-2 from adult feces) were comparatively analyzed with seven commercially available EIA kits [Abbott CEA-EIA Monoclonal, D-ZYME CEA, Imzyne CEA, CEA MITSUI II, CEA Roche EIA, Immunoball-CEA (N), and Glaozyme CEA]. All kits employ a sandwich-type solid-phase method using polystyrene beads and monoclonal anti-CEA antibodies as either capture antibody and/or tracer antibody. In general, all CEAs reacted well with these assay kits. Reactivity differences in weight among the CEA preparations were, however, observed in all but one assay kit (D-ZYME CEA) in which all CEAs showed fairly homogeneous reactivity. The degree of reaction intensity among the preparations used varied depending on the assay kits used. NCA, which is well known to be partially cross-reactive with CEA, revealed a negligible reactivity in all kits. NFA-1 which is also partially cross-reactive with CEA but antigenically unrelated to NCA, showed very strong reactivity in 2 kits [CEA Roche EIA and Immunoball-CEA (N)] and weak reactivity in another kit (CEA MITSUI II). NCA-2 in meconium and NFA-2 in normal adult feces, which both have immunochemical and physicochemical properties very similar to those of CEA, reacted to a greater or lesser extent with all kits. However, one assay kit (D-ZYME CEA), whose reactivity to different CEAs was fairly homogeneous, could discriminate CEAs from NCA-2 and NFA-2. Although the reactivity of NFA-2 was less than that of any CEA in all kits, that of NCA-2 was higher than that of some CEAs in 3 kits (Abbott CEA-EIA Monoclonal, CEA MITSUI II, and CEA Roche EIA). These differences in reactivity and specificity of currently available EIA kits for CEA should be borne in mind when selecting an assay kit.

Topics: Antibodies, Monoclonal; Antigens; Carcinoembryonic Antigen; Chromatography, High Pressure Liquid; Colonic Neoplasms; Cross Reactions; Feces; Humans; Immunoenzyme Techniques; Liver Neoplasms; Lung; Meconium; Molecular Weight; Reagent Kits, Diagnostic

The chemical structure of carcinoembryonic antigen (CEA) and two closely related antigens, normal fecal antigen-2 (NFA-2) in normal adult feces and nonspecific cross-reacting antigen-2 (NCA-2) in the meconium, were further analyzed comparatively. The NH2-terminal amino acid sequence of NCA-2 was newly determined to position 18 and found to be identical to that so far determined for CEA- and NFA-2. After proteolytic digestion with chymotrypsin or protease V8, the digests of these antigens showed two groups of fragments upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis. One consisted of the sharply banded fragments which were identical in all antigens and stained only with Coomassie brilliant blue (CBB) (five bands in the range 2500-10,000 daltons for chymotrypsin and 11 bands in the range 8000-35,000 daltons for protease V8, respectively), and the other consisted of the dispersed fragments which had variable mol. wts in the range 10,000-100,000 and were stainable with both CBB and periodic acid-Schiff reagent. Elution profiles of CEA, NFA-2, and NCA-2 from lectin columns, especially from concanavalin A-Sepharose columns, suggested some differences in oligosaccharide chains between them. These results indicate that the fundamental chemical structure of these antigens seems to be very similar to one another and is divided into two parts; an homologous portion(s) which is common to all three antigens and contains no sialylated sugar components, and a heterogeneous portion(s) which is variable among these antigens and contains sialylated sugar components.

Topics: Adult; Amino Acid Sequence; Antigens; Antigens, Neoplasm; Carcinoembryonic Antigen; Cell Adhesion Molecules; Chemical Phenomena; Chemistry; Chromatography, Affinity; Chymotrypsin; Electrophoresis, Polyacrylamide Gel; Endopeptidases; Feces; Glycoproteins; Humans; Infant, Newborn; Lectins; Liver Neoplasms; Meconium; Serine Endopeptidases

Two antigens cross-reactive with carcinoembryonic antigen (CEA) and distinct from the nonspecific cross-reacting antigen were identified in meconium by double immunodiffusion with a conventional goat anti-CEA antiserum. These two antigens together competitively inhibited cross-reacting antibodies against them in CEA radioimmunoassay and contributed to the measurement of meconium CEA levels which averaged 6 times higher than that determined with anti-CEA specific antibody. A purification method for one of these antigens, tentatively designated meconium antigen, is described and uses a combination of ethanol fractionation, ion-exchange and molecular sieve chromatography, and adsorption to an immunoadsorbent containing a cross-reactive murine monoclonal antibody to CEA. Preliminary characterization of the purified meconium antigen showed it to be a glycoprotein, migrating as an alpha-globulin and having a molecular size similar to that of CEA (Mr 185,000 versus 200,000). Antigenically, it lacks at least one determinant present on CEA and differs further from CEA by being weakly reactive with concanavalin A and resistant to proteolytic digestion with Pronase E. Although these properties of meconium antigen suggest that it may be nonspecific cross-reacting antigen 2, additional chemical and antigenic studies are required to establish its relationship to CEA and other CEA-related antigens in meconium.

Topics: Adenocarcinoma; Antigens; Carcinoembryonic Antigen; Colonic Neoplasms; Humans; Immunodiffusion; Infant, Newborn; Liver Neoplasms; Meconium; Radioimmunoassay

Topics: Adult; Animals; Animals, Newborn; Bile; Bone Marrow; Carcinoma, Hepatocellular; Cattle; Countercurrent Distribution; Cricetinae; Duodenum; Feces; Female; Germ-Free Life; Heart; Heme; Humans; Infant, Newborn; Intestinal Secretions; Lacrimal Apparatus; Liver; Liver Neoplasms; Male; Meconium; Porphyrias; Porphyrins; Rhodobacter sphaeroides; Swine

Human alpha fetoprotein (AFP) has been detected by the agar double diffusion method in ascitic fluid, cerebrospinal fluid (CSF) and bile, from fetuses, neonates and patients with AFP seropositive hepatocellular carcinoma. AFP was detected in the meconium and faeces of fetuses and neonates respectively. The protein was not detected in the amniotic fluid nor the pericardial fluid. It was found in the urine in only two fetuses that had concomittant renal disease. It was not detected in breast milk of lactating females. When metastases occurred in the lung from a hepatocellular carcinoma producing AFP, the pleural effusions sometimes contained AFP. The concentrations of AFP in the serum and in the other body fluids were about the same. This indicates that other body fluids can be used for the diagnosis of hepatocellular carcinoma.

Topics: Adult; Amniotic Fluid; Animals; Ascitic Fluid; Bile; Body Fluids; Carcinoma, Hepatocellular; Feces; Female; Fetal Proteins; Fetus; Humans; Immunodiffusion; Infant, Newborn; Liver Neoplasms; Lung Neoplasms; Meconium; Middle Aged; Milk, Human; Neoplasm Metastasis; Pericardial Effusion; Pleural Effusion; Rabbits

Topics: Abdomen, Acute; Cysts; Diagnosis, Differential; Digestive System Abnormalities; Female; Follow-Up Studies; Hemangioma; Humans; Hydronephrosis; Infant, Newborn; Infant, Newborn, Diseases; Kidney Diseases; Kidney Neoplasms; Liver Neoplasms; Male; Meconium; Neuroblastoma; Ovarian Cysts; Peritonitis; Polycystic Kidney Diseases; Renal Veins; Retroperitoneal Neoplasms; Stomach Neoplasms; Teratoma; Thrombophlebitis; Uterine Diseases; Vaginal Diseases