The overall objective of this research is to study the mechanisms governing the interactions between the brain and the immune system. Using a number of different approaches to perturb the central nervous system of animals, we will examine subsequent alterations in in vivo and in vitro specific immune responsiveness. Particular attention will be given to the effects of these perturbations on lymphocyte (B-cell T-helper and T-suppressor) and macrophage function and their interactions. The effect of electrolytic cerebral lesions on the ability of trinitrophenyl-keyhole limpet hemocyanin (TNP-KLH) primed animal to respond in vitro to this antigen will be studied with emphasis on T and B-cell function. Similar types of experiments are planned to define the effect of chemical lesions induced by intracisternal injection of 6-hydroxydopamine (6-OHDA). In animals treated with 6-OHDA the in vivo primary antibody response to thymic dependent (TD) and independent antigens (TI) will be assessed. The ability of antigen specific B-cells obtained from 6-OHDA treated animals to respond in vitro to a TI antigen and to a TD antigen in the presence of T-helper cells will be studied. Additionally, antigen presentation by splenic adherent cells obtained from these treated animals will be determined as will the presence of increased suppressor cell activity (macrophage or T-suppressor cell). We have demonstrated that serotonin can modulate in vivo antibody responsiveness and that lymphy and macrophages have serotonin receptors. Experiments are planned to further investigate the mechanisms of serotonin induced modulation of the antibody response in vivo and in vitro. The same immunologic approach as described for 6-OHDA treated animals will be employed. Further characterization of lymphocytes with serotonin receptors is planned together with experiments to define the functional significance of serotonin receptors on these lymphocytes as well as macrophages. A series of experiments to define the effects of chemical (6-OHDA) and electrolytic lesions on lymphoid tissue monoamine levels employing high pressure liquid chromatograph (HPLC) are planned. Lastly, we propose to ivestigate the temporal effect of an immunogenic and tolerogenic antigen challenge on hypothalamic monoamine levels employing HPLC.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS017423-06
Application #
3397571
Study Section
Neurology C Study Section (NEUC)
Project Start
1981-09-01
Project End
1990-02-28
Budget Start
1987-03-01
Budget End
1988-02-29
Support Year
6
Fiscal Year
1987
Total Cost
Indirect Cost
Name
University of Kentucky
Department
Type
Schools of Medicine
DUNS #
832127323
City
Lexington
State
KY
Country
United States
Zip Code
40506
Rock, M T; Brooks, W H; Roszman, T L (1997) Calcium-dependent signaling pathways in T cells. Potential role of calpain, protein tyrosine phosphatase 1b, and p130Cas in integrin-mediated signaling events. J Biol Chem 272:33377-83
Elliott, L H; Levay, A K; Sparks, B et al. (1996) Dexamethasone and prostaglandin E2 modulate T-cell receptor signaling through a cAMP-independent mechanism. Cell Immunol 169:117-24
Selliah, N; Bartik, M M; Carlson, S L et al. (1995) cAMP accumulation in T-cells inhibits anti-CD3 monoclonal antibody-induced actin polymerization. J Neuroimmunol 56:107-12
Bauman, G P; Bartik, M M; Brooks, W H et al. (1994) Induction of cAMP-dependent protein kinase (PKA) activity in T cells after stimulation of the prostaglandin E2 or the beta-adrenergic receptors: relationship between PKA activity and inhibition of anti-CD3 monoclonal antibody-induced T cell proliferation. Cell Immunol 158:182-94
Carlson, S L; Trauth, K; Brooks, W H et al. (1994) Enhancement of beta-adrenergic-induced cAMP accumulation in activated T-cells. J Cell Physiol 161:39-48
Bartik, M M; Bauman, G P; Brooks, W H et al. (1994) Costimulatory signals modulate the antiproliferative effects of agents that elevate cAMP in T cells. Cell Immunol 158:116-30
Elliott, L; Brooks, W; Roszman, T (1993) Inhibition of anti-CD3 monoclonal antibody-induced T-cell proliferation and interleukin-2 secretion by physiologic combinations of dexamethasone and prostaglandin E2. Cell Mol Neurobiol 13:579-92
Bartik, M M; Brooks, W H; Roszman, T L (1993) Modulation of T cell proliferation by stimulation of the beta-adrenergic receptor: lack of correlation between inhibition of T cell proliferation and cAMP accumulation. Cell Immunol 148:408-21
Elliott, L; Brooks, W; Roszman, T (1992) Inhibition of anti-CD3 monoclonal antibody-induced T-cell proliferation by dexamethasone, isoproterenol, or prostaglandin E2 either alone or in combination. Cell Mol Neurobiol 12:411-27
Roszman, T L; Brooks, W H (1992) Signaling pathways of the neuroendocrine-immune network. Chem Immunol 52:170-90

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