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C Moroz

Publications and source records attributed to C Moroz.

87 records · Page 5Linked to original sources
PubMed1973

Cell-surface immunoglobulin human thymus cells and its biosynthesis in vitro.

Human thymus cells synthesize immunoglobulin in short-term culture, the nascent immunoglobulin appearing in both cytoplasmic and membrane fractions. Surface immunoglobulin was demonstrated by lactoperoxidase radioiodination of the cells. The demonstration of intracellular and surface immunoglobulin required procedures that minimize proteolytic degradation. Noncovalently linked, monomeric mu chains and light chains were found in the cytoplasm and on the surface of the cells by means of acrylamide gel electrophoresis and by specific immunoprecipitation of the isolated chains.

Animals↗
PubMed1971

A hereditary immunoglobulin A abnormality: absence of light-heavy-chain assembly. Study of immunoglobulin synthesis in tonsillar cells.

A new immunoglobulin A abnormality, absence of assembly of alpha-chain and light-chain, was found in an adult female suffering from recurrent upper respiratory infection and tonsillitis since childhood, but otherwise healthy. The IgA abnormality was manifest in her serum by the presence of free alpha-chains, in her saliva by the presence of alpha-chains bound to secretory piece, and in her urine by the presence of free alpha-chains and free light-chains. The serum IgG and IgM were found to be complete, containing both heavy-chains and light-chains. Evidence for this immunoglobulin A abnormality was also found in the proposita's mother and elder son, demonstrating it to be a hereditary disorder. Studies performed with patient's tonsillar cells in short-term culture, using amino acids-(14)C, revealed synthesis and secretion of both free alpha-chains and free light-chains, in addition to synthesis and secretion of normally assembled IgG and IgM.

Adult↗
PubMedDate not supplied

Antimitochondrial antibodies after acute myocardial infarction.

The development of anti-heart mitochondrial antibodies (AHMA) after acute myocardial infarction (AMI) has been previously demonstrated in experimental studies. We performed a prospective study to check the incidence, variation curve and specificity of AHMA and AMI by using two different immunological tests: complement fixation and antihuman globulin consumption. Serial venous blood samples were drawn from the patients as follows: for the first 14 days after the event, once every other day; from 14 to 60 days after the acute event, once a week. The development of AHMA was demonstrated in the sera of 15/35 (45.4%) patients with AMI by complement fixation test using mitochondrial antigen obtained from normal human heart tissue compared to 12/33 (36.3%) by using mitochondrial antigen from the infarcted region. The antibodies exhibited cross-reaction with mitochondrial antigens obtained from human skeletal muscle, but did not react with heterologous heart mitochondrial antigens. According to the results of the antihuman globulin consumption test, the AHMA is immunoglobulin M (IgM). None of the patients developed postmyocardial infarction syndrome.

Adult↗
PubMedDate not supplied

The metabolism of adenosine and distribution of adenosine receptor lymphocytes in two human circulating T cell subsets.

Human circulating E rosette forming cells (ERFC), rerosetted with sheep erythrocytes in the presence of adenosine, yielded two T-lymphocyte subpopulations: a major fraction forming E-rosettes (E resistant = ER) and a minor non-rosetting fraction (E sensitive - ES). Both T cell subpopulations converted adenosine mainly into inosine. However, ES cells metabolized adenosine more extensively than ER cells. Adenosine deaminase (ADA) activity was significantly higher in ES cells. Purine nucleoside phosphorylase (PNP) activity, as well as hypoxanthine guanosine phosphoribosyl transferase (HGPRT) activity were similar in both T cell subsets. The ratio of ADA/PNP in ES cells relative to ER cells was 1.8 suggesting that ES cells are at an earlier stage of differentiation. Enrichment of lymphocytes bearing a receptor for adenosine was demonstrated in ES cells.

Adenosine↗
PubMedDate not supplied

Suppressor cel activity of ferritin-bearing lymphocytes in patients with breast cancer.

In patients with early stages (I, II) of breast cancer we identified a subset of circulating lymphocytes that carry ferritin on their surface. No such lymphocytes were identified in normal women nor in women with benign breast disease. These cells did not form spontaneous rosettes with sheep red blood cells. Further studies revealed that in vitro treatment of the patients' lymphocytes with levamisole resulted n the removal of the surface ferritin and in an increase in the reactivity of the lymphocytes in mixed lymphocyte culture (MLC). Separation of the ferritin-positive lymphocytes from the E-rosetting T cells resulted in an increased reactivity of the patients' T cells in MLC. Readdition of the fraction containing the ferritin-positive cells to a mixed lymphocyte culture resulted in a decrease in the proliferative response of the patients' T lymphocytes. It is suggested that the ferritin-positive lymphocytes in breast cancer patients represent an active suppressor cell subset.

Breast Neoplasms↗
PubMedDate not supplied

The significance of ferritin in malignant diseases.

Ferritins are a group of isometric proteins having an important function in iron storage and metabolism and are found in high concentration in the liver, spleen and bone marrow. Acidic isoferritins are found in human fetal liver, primary mammary, gastric and pancreatic carcinomas, and are termed carcinofetal ferritins. Elevated levels of serum ferritin were found in patients with various malignant diseases such as Hodgkin's disease, chronic myeloblastic, granulocytic and lymphatic leukemias and myeloblastosis, in patients with breast cancer, multiple myeloma, malignant lymphoma, carcinoma of the gastro intestinal tract and germinal cell tumors of the testis. Recently a subpopulation of circulating T lymphocytes bearing surface ferritin was found in patients with breast cancer and untreated Hodgkin's disease. No such lymphocytes were demonstrated in normals or in patients with benign breast disease. The appearance of such subpopulation in the circulation is an early manifestation of the neoplastic disease, and its identification may provide a tool of potential diagnostic and prognostic importance in the management of Hodgkin's disease and breast cancer.

Breast Neoplasms↗