Surface markers on bovine fetal lymphocytes and immunoglobulin synthesis in a congenital infection related to epizootic bovine abortion
| Autor: | R. Spezialetti, J.W. Osebold |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Peanut agglutinin
medicine.drug_class Lymphocyte T-Lymphocytes Population Cattle Diseases Immunoglobulins Immunoglobulin E Monoclonal antibody Andrology Leukocyte Count Pregnancy medicine Null cell Animals Lymphocytes education education.field_of_study Fetus B-Lymphocytes General Veterinary biology Antibodies Monoclonal Abortion Veterinary Flow Cytometry Fetal Diseases medicine.anatomical_structure Receptors Mitogen embryonic structures Immunology biology.protein Cattle Female Lymph Nodes Antibody |
| Zdroj: | Research in veterinary science. 51(3) |
| ISSN: | 0034-5288 |
| Popis: | Immunological parameters were studied among 23 late-term bovine fetuses. Epizootic bovine abortion ( EBA ) disease was induced in fetuses by feeding Ornithodoros coriaceus ticks on pregnant heifers. A spirochaete-like microorganism was detected in the blood of diseased fetuses and in inapparent natural infections in some abattoir-collected fetuses. Fetuses were classified according to stages of disease: EBA diseased (n =10), EBA infected (n = 7) and normal (n = 6). Using flow cytometry, the presence of surface immunoglobulins (sIg) and peanut agglutinin ( PNA ) receptors were used to detect B and T lymphocytes, respectively. In peripheral blood of normal fetuses, most lymphocytes were identified as T or B cells, whereas about 20 per cent of lymphocytes in EBA diseased fetuses did not reveal the sIg or PNA receptor markers (null cells). Size and shape analyses by flow cytometry detected a population of enlarged lymphocytes in the EBA diseased fetuses. The numbers of cells bearing determinants reactive with monoclonal antibodies specific for bovine T cells (B26A and B29A) and B cells (TH21A) were considerably less than those expressing the PNA receptor and sIg. These results suggested that the monoclonal antibodies were binding to differentiation antigens which were not consistently expressed on the fetal cells. Radioimmunodiffusion was used to measure bovine IgM, IgG 1 and IgG 2 in fetal serum. The quantities of immunoglobulins were markedly increased in animals infected with the spirochaete-like organism (groups 1 and 2) and were assumed to result from fetal antibody synthesis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|