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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Grinstein, S. Lee, J. W. Lederman, H. M. Cheung, R. K. Gelfand, E. W. |
| Abstract | We have used the T-cell mitogen Staphylococcus aureus protein A (SpA) to study the role of monocytes in the early events of T-lymphocyte activation. The mitogenic response of human peripheral blood mononuclear cells (PBM) was compared to the response of populations enriched for T cells by E-rosetting (PBM-E+). In response to SpA, the [3H]thymidine uptake of PBM-E+ was reduced by 80% compared to PBM. The reduced response of PBM-E+ was completely restored by the addition of irradiated PBM-E- or the monocyte-like human cell line U-937 but not by addition of irradiated PBM-E+. A direct interaction of SpA with monocytes is important since proliferative responses could be generated by preincubation of U-937 with SpA followed by washing and subsequent addition to PBM-E+; incubation of PBM-E+ with SpA followed by washing and subsequent addition of U-937 did not result in a proliferative response. To further delineate the role of the monocyte, we examined the ability of soluble SpA, U-937, or U-937 preincubated with SpA to trigger Ca2+ flux into T lymphocytes, an early step in initiation of the proliferative response. SpA-pretreated U-937, but neither SpA nor monocytes alone, triggered Ca2+ movement into the T lymphocytes. This defines a new role for the monocyte in the early events of T-lymphocyte activation. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 21 |
| Volume Number | 81 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1984-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Calcium Metabolism Lymphocyte Activation Monocytes Physiology Staphylococcal Protein A Pharmacology T-Lymphocytes Immunology Radiation Effects Phytohemagglutinins Rosette Formation Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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