Multiple sclerosis is a presumed autoimmune disease of the central nervous system. In the past three years we have studied immunoregulatory T-cells in MS using monoclonal antibodies and have found perturbations of suppressor/cytotoxic cells that appear to correlate with disease activity. In addition, we have found that various forms of immunotherapy may affect the course of multiple sclerosis; specifically, the use of short courses of high dose cyclophosphamide, which presumably acts by destroying immunocompetent lymphocytes. The current proposal is an extension of these studies, applying T-cell cloning techniques and limiting dilution analysis for a more sophisticated analysis of T-cell immunoregulation in multiple sclerosis. In addition, immunologic studies in patients currently undergoing a variety of immunotherapeutic regimens will be continued. Investigation of immunoregulatory T-cells in MS will include the following: 1) limiting dilution analysis of T-cells in peripheral blood and cerebrospinal fluid in order to correlate T-cell phenotype with functional characteristics (viz., cytotoxic, suppressor and helper function); 2) analysis of white matter reactive clones in peripheral blood and cerbrospinal fluid to a series of defined white matter antigens; 3) investigation of autoreactive T-cell clones; 4) analysis of T-cell activaton antigens; and 5) immunohistochemical analysis of lymphocytes in multiple sclerosis plaques. Clinical studies will involve investigation of the effect of other immunotherapeutic regimens on immune parameters in MS. This proposal represents a revised competitive renewal as follows: Clinical studies treating multiple sclerosis patients with monoclonal anti-T12 antibody have been deleted from this revised proposal and new data and investigations related to T-cell activation antigens, limited dilution analysis of T-cell clones, and autoreactive T-cells have been incorporated.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS023132-03
Application #
3406314
Study Section
Immunological Sciences Study Section (IMS)
Project Start
1985-04-01
Project End
1988-03-31
Budget Start
1987-04-01
Budget End
1988-03-31
Support Year
3
Fiscal Year
1987
Total Cost
Indirect Cost
Name
Brigham and Women's Hospital
Department
Type
DUNS #
071723621
City
Boston
State
MA
Country
United States
Zip Code
02115
Murugaiyan, Gopal; Beynon, Vanessa; Pires Da Cunha, Andre et al. (2012) IFN-? limits Th9-mediated autoimmune inflammation through dendritic cell modulation of IL-27. J Immunol 189:5277-83
Mittal, Akanksha; Murugaiyan, Gopal; Beynon, Vanessa et al. (2012) IL-27 induction of IL-21 from human CD8+ T cells induces granzyme B in an autocrine manner. Immunol Cell Biol 90:831-5
Murugaiyan, Gopal; Beynon, Vanessa; Mittal, Akanksha et al. (2011) Silencing microRNA-155 ameliorates experimental autoimmune encephalomyelitis. J Immunol 187:2213-21
Murugaiyan, Gopal; Mittal, Akanksha; Weiner, Howard L (2010) Identification of an IL-27/osteopontin axis in dendritic cells and its modulation by IFN-gamma limits IL-17-mediated autoimmune inflammation. Proc Natl Acad Sci U S A 107:11495-500
Murugaiyan, Gopal; Mittal, Akanksha; Lopez-Diego, Rocio et al. (2009) IL-27 is a key regulator of IL-10 and IL-17 production by human CD4+ T cells. J Immunol 183:2435-43
Murugaiyan, Gopal; Mittal, Akanksha; Weiner, Howard L (2008) Increased osteopontin expression in dendritic cells amplifies IL-17 production by CD4+ T cells in experimental autoimmune encephalomyelitis and in multiple sclerosis. J Immunol 181:7480-8
Vaknin-Dembinsky, Adi; Brass, Steven D; Brass, Steven et al. (2008) Membrane bound IL-15 is increased on CD14 monocytes in early stages of MS. J Neuroimmunol 195:135-9
Vaknin-Dembinsky, Adi; Murugaiyan, Gopal; Hafler, David A et al. (2008) Increased IL-23 secretion and altered chemokine production by dendritic cells upon CD46 activation in patients with multiple sclerosis. J Neuroimmunol 195:140-5
Gandhi, Roopali; Anderson, David E; Weiner, Howard L (2007) Cutting Edge: Immature human dendritic cells express latency-associated peptide and inhibit T cell activation in a TGF-beta-dependent manner. J Immunol 178:4017-21
Karni, Arnon; Abraham, Michal; Monsonego, Alon et al. (2006) Innate immunity in multiple sclerosis: myeloid dendritic cells in secondary progressive multiple sclerosis are activated and drive a proinflammatory immune response. J Immunol 177:4196-202

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