. Studies with Leishmania major, which visceralizes in susceptible mice to produce a disease much like human kala-azar, have shown that the inability to control the parasite correlates with the inability to activate and expand CD4+ T cells to produce IFN-gamma. Although resistant mice successfully activate CD4+ cells that produce IL-4, a cytokine that interferes with both the production of IFN-gamma and the capacity of IFN-gamma to activate macrophages to kill the intracellular parasite. The inability of susceptible mice to heal is not due to a deletion of the requisite IFN-gamma-producing CD4+ T cells, since various immunologic manipulations, including anti-IL-4 monoclonal antibody, enable susceptible animals to control infection. These immunologic manipulations must be made at the onset of infection, however, suggesting that the early interactions of parasite antigens with the immune system are most important in determining the outcome of disease. These experiments, together with various reconstitution experiments into defined recipient mice using parasite-specific CD4+ lines and clones, implicate CD4+ cells centrally in the response of leishmania. This proposal seeks to analyze CD4+ T lymphocytes at the molecular level in order further insights into genetic determinants of susceptibility with the potential for the development of unique therapeutic approaches. There are four specific goals: 1). to assess T cell receptor (TcR) usage that occurs in susceptible BALB/c mice during infection with Leishmania and after interventions (anti-CD4, anti-IL-4) that allow these mice to heal and develop immunity; 2) to characterize CD4+ cell lines and clones established from these mice for TcR type, antigen specificity, cytokine profiles and the capacity to mediate protection or progressive infection when transferred into scid mice; 3) to clone and sequence TcR beta and alpha cDNA from CD4+ clones implicated in mediating disease outcome; 4) to clone the genomically rearranged TcR genes and established transgenic mice in order to examine directly the role of TcR in mediating susceptibility and Th cell development.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
5R01AI030663-03
Application #
3145758
Study Section
Bacteriology and Mycology Subcommittee 2 (BM)
Project Start
1991-01-01
Project End
1993-12-31
Budget Start
1993-01-01
Budget End
1993-12-31
Support Year
3
Fiscal Year
1993
Total Cost
Indirect Cost
Name
University of California San Francisco
Department
Type
Schools of Medicine
DUNS #
073133571
City
San Francisco
State
CA
Country
United States
Zip Code
94143
Nusse, Ysbrand M; Savage, Adam K; Marangoni, Pauline et al. (2018) Parasitic helminths induce fetal-like reversion in the intestinal stem cell niche. Nature 559:109-113
Ricardo-Gonzalez, Roberto R; Van Dyken, Steven J; Schneider, Christoph et al. (2018) Tissue signals imprint ILC2 identity with anticipatory function. Nat Immunol 19:1093-1099
Schneider, Christoph; O'Leary, Claire E; von Moltke, Jakob et al. (2018) A Metabolite-Triggered Tuft Cell-ILC2 Circuit Drives Small Intestinal Remodeling. Cell 174:271-284.e14
Van Dyken, Steven J; Liang, Hong-Erh; Naikawadi, Ram P et al. (2017) Spontaneous Chitin Accumulation in Airways and Age-Related Fibrotic Lung Disease. Cell 169:497-509.e13
Savage, Adam K; Liang, Hong-Erh; Locksley, Richard M (2017) The Development of Steady-State Activation Hubs between Adult LTi ILC3s and Primed Macrophages in Small Intestine. J Immunol 199:1912-1922
von Moltke, Jakob; O'Leary, Claire E; Barrett, Nora A et al. (2017) Leukotrienes provide an NFAT-dependent signal that synergizes with IL-33 to activate ILC2s. J Exp Med 214:27-37
Van Dyken, Steven J; Nussbaum, Jesse C; Lee, Jinwoo et al. (2016) A tissue checkpoint regulates type 2 immunity. Nat Immunol 17:1381-1387
von Moltke, Jakob; Ji, Ming; Liang, Hong-Erh et al. (2016) Tuft-cell-derived IL-25 regulates an intestinal ILC2-epithelial response circuit. Nature 529:221-5
Mohapatra, A; Van Dyken, S J; Schneider, C et al. (2016) Group 2 innate lymphoid cells utilize the IRF4-IL-9 module to coordinate epithelial cell maintenance of lung homeostasis. Mucosal Immunol 9:275-86
Lee, Min-Woo; Odegaard, Justin I; Mukundan, Lata et al. (2015) Activated type 2 innate lymphoid cells regulate beige fat biogenesis. Cell 160:74-87

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