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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Funa, K. Palacios, R. Sideras, P. Zalcberg-quintana, I. Xanthopoulos, K. G. Kisielow, P. |
| Description | Author Affiliation: Sideras P ( Department of Immunology, University of Stockholm, Sweden.); |
| Abstract | We have made use of RNA.RNA in situ hybridization to study the presence of cells producing mRNA for interleukin 4 (IL-4) in the developing thymus, spleen, and T-cell line 2.19. Approximately 1 of 300-400 spleen cells expressed detectable IL-4 mRNA 24 hr after their stimulation by the lectin concanavalin A. Spleen cells were also induced to express mRNA for IL-4 by stimulation with alloantigens. Splenocytes producing mRNA for IL-4 were detected 4 hr after stimulation by concanavalin A; the response peaked at approximately equal to 24 hr and was undetectable by 72 hr. Cyclosporin A inhibited the synthesis of IL-4 mRNA in the T-cell line 2.19, which had been induced by concanavalin A. Approximately 1 of 10 fetal thymocytes at day 14 of gestation expressed mRNA for IL-4 after their stimulation by phorbol 12-myristate 13-acetate and ionomycin. Both the frequency of fetal thymocytes expressing IL-4 mRNA and the amount of mRNA for IL-4 synthesized per cell sharply decreased at day 16 of gestation, and less than 1 of 1800 fetal thymocytes at day 18 of gestation expressed detectable IL-4 mRNA. Our results define the relative frequency of cells capable of expressing IL-4 mRNA after stimulation in vitro in the spleen and in the developing thymus. The data strongly argue for an important role of IL-4 in growth and differentiation of lymphoid cells, notably during T-cell development within the thymus. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 1 |
| Volume Number | 85 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1988-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | B-Lymphocytes Immunology Interleukins Genetics RNA, Messenger T-Lymphocytes Thymus Gland Animals Interleukin-4 Mice Mice, Inbred Strains Nucleic Acid Hybridization Embryology Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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