Abstract
Mouse spleen suspensions generate discrete cell clusters within 1-2 d of culture. We have isolated these clusters by velocity sedimentation to study their contribution to primary antibody responses. Clusters represent approximately 5% of the starting spleen cells and consist of 20-50% B cells, 20-50% T cells, and 10-20% dendritic cells (DC). When the cultures are stimulated with thymus-dependent antigens, like heterologous red cells or dinitrophenyl-keyhole limpet hemocyanin (DNP- KLH), the clusters are the principal site for the development of plaque- forming cells (PFC). Noncluster fractions form few PFC and only when supplemented with fresh DC. PFC responses in all cases are antigen specific. B cells cluster only in the presence of T cells and DC (1 DC/200 B-T cell mixtures) and only after encountering specific antigen. The elimination of either DC or Lyt-1+2- T cells, with monoclonal antibody and complement, ablates B cell development into PFC. PFC responses are restored with antigen-nonspecific helper factors formed in the syngeneic mixed leukocyte reaction between DC and T cells. Since PFC to DNP-KLH do not develop de novo when B cells are exposed to antigen and helper factors, anti-DNP PFC precursors must be stimulated within clusters to become responsive to helper factors. PFC development within clusters is restricted by the major histocompatibility complex (MHC). When DC and T cells are from strain P1, then P1 but not P2 B cells develop into PFC; when DC are from strain P2 and T cells from strain P1, strain P2 B cells are selected to become PFC in clusters. The entry of B cells into clusters is itself MHC restricted, since P1 DC/T cells aggregate six times as many B cells from strain P1 as strain P2. Thus, clusters are the site in which DC, B, and T cells interact to generate PFC. One can use clusters to retrieve B cells that have been selected in an antigen-dependent, MHC-restricted fashion and to show that clustering B cells become responsive to soluble, polyclonal helper factors.
Full Text
The Full Text of this article is available as a PDF (2.2 MB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Andersson J., Schreier M. H., Melchers F. T-cell-dependent B-cell stimulation is H-2 restricted and antigen dependent only at the resting B-cell level. Proc Natl Acad Sci U S A. 1980 Mar;77(3):1612–1616. doi: 10.1073/pnas.77.3.1612. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Augustin A. A., Coutinho A. Specific T helper cells that activate B cells polyclonally. In vitro enrichment and cooperative function. J Exp Med. 1980 Mar 1;151(3):587–601. doi: 10.1084/jem.151.3.587. [DOI] [PMC free article] [PubMed] [Google Scholar]
- EISEN H. N., KERN M., NEWTON W. T., HELMREICH E. A study of the distribution of 2,4-dinitrobenzene sensitizers between isolated lymph node cells and extracellular medium in relation to induction of contact skin sensitivity. J Exp Med. 1959 Aug 1;110(2):187–206. doi: 10.1084/jem.110.2.187. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Inaba K., Granelli-Piperno A., Steinman R. M. Dendritic cells induce T lymphocytes to release B cell-stimulating factors by an interleukin 2-dependent mechanism. J Exp Med. 1983 Dec 1;158(6):2040–2057. doi: 10.1084/jem.158.6.2040. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Katz D. H., Hamaoka T., Benacerraf B. Cell interactions between histoincompatible T and B lymphocytes. II. Failure of physiologic cooperative interactions between T and B lymphocytes from allogeneic donor strains in humoral response to hapten-protein conjugates. J Exp Med. 1973 Jun 1;137(6):1405–1418. doi: 10.1084/jem.137.6.1405. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Keller D. M., Swierkosz J. E., Marrack P., Kappler J. W. Two types of functionally distinct, synergizing helper T cells. J Immunol. 1980 Mar;124(3):1350–1359. [PubMed] [Google Scholar]
- Mitchison N. A. The carrier effect in the secondary response to hapten-protein conjugates. II. Cellular cooperation. Eur J Immunol. 1971 Jan;1(1):18–27. doi: 10.1002/eji.1830010104. [DOI] [PubMed] [Google Scholar]
- Monroe J. G., Cambier J. C. B cell activation. III. B cell plasma membrane depolarization and hyper-Ia antigen expression induced by receptor immunoglobulin cross-linking are coupled. J Exp Med. 1983 Nov 1;158(5):1589–1599. doi: 10.1084/jem.158.5.1589. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nussenzweig M. C., Steinman R. M. Contribution of dendritic cells to stimulation of the murine syngeneic mixed leukocyte reaction. J Exp Med. 1980 May 1;151(5):1196–1212. doi: 10.1084/jem.151.5.1196. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nussenzweig M. C., Steinman R. M., Unkeless J. C., Witmer M. D., Gutchinov B., Cohn Z. A. Studies of the cell surface of mouse dendritic cells and other leukocytes. J Exp Med. 1981 Jul 1;154(1):168–187. doi: 10.1084/jem.154.1.168. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rittenberg M. B., Pratt K. L. Antitrinitrophenyl (TNP) plaque assay. Primary response of Balb/c mice to soluble and particulate immunogen. Proc Soc Exp Biol Med. 1969 Nov;132(2):575–581. doi: 10.3181/00379727-132-34264. [DOI] [PubMed] [Google Scholar]
- Sprent J. Restricted helper function of F1 hybrid T cells positively selected to heterologous erythrocytes in irradiated parental strain mice. II. Evidence for restrictions affecting helper cell induction and T-B collaboration, both mapping to the K-end of the H-2 complex. J Exp Med. 1978 Apr 1;147(4):1159–1174. doi: 10.1084/jem.147.4.1159. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Steinman R. M., Gutchinov B., Witmer M. D., Nussenzweig M. C. Dendritic cells are the principal stimulators of the primary mixed leukocyte reaction in mice. J Exp Med. 1983 Feb 1;157(2):613–627. doi: 10.1084/jem.157.2.613. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Witmer M. D., Steinman R. M. The anatomy of peripheral lymphoid organs with emphasis on accessory cells: light-microscopic immunocytochemical studies of mouse spleen, lymph node, and Peyer's patch. Am J Anat. 1984 Jul;170(3):465–481. doi: 10.1002/aja.1001700318. [DOI] [PubMed] [Google Scholar]
- Zubler R. H., Glasebrook A. L. Requirement for three signals in "T-independent" (lipopolysaccharide-induced) as well as in T-dependent B cell responses. J Exp Med. 1982 Mar 1;155(3):666–680. doi: 10.1084/jem.155.3.666. [DOI] [PMC free article] [PubMed] [Google Scholar]
