This revised PPG competing renewal application is driven by the fundamental and therapeutic importance of costimulatory pathways for regulating T cell activation and tolerance, and builds upon our significant progress since initial awarding of this PPG in 2003. The synergy in our PPG is highlighted by 111 publications, 49 of which have been co-authored by multiple PPG investigators, and include 33 new publications since the first (May 2007) submission. Our PPG also has had a significant role in mentoring fellows who work on joint projects, and fostering development of junior faculty. Our PPG has not only provided novel insights to the field, but allowed sharing of novel mAbs and fusion proteins, and mouse strains with the broader scientific community that resulted in better understanding of the functions of costimulatory pathways above and beyond our PPG aims. The overall objective of our PPG is to achieve a mechanistic understanding of the roles of pathways in the B7:CD28 family in regulating T cell activation and tolerance. Building upon our published and preliminary data, these goals include: 1) investigate roles of these pathways in regulating T cell responses in target tissues versus lymphoid organs, 2) dissect functional hierarchy, dominance and redundancy among these pathways, and 3) study how these pathways regulate the balance between protective and pathogenic T cell responses, ultimately determining the fate of the immune response, using experimental models of transplantation, autoimmunity, and infection. The proposed PPG renewal application will provide a means by which PPG investigators can continue to work together to address these important issues and develop a comprehensive understanding of the functions of B7:CD28 family members, ultimately leading to development of novel immunotherapeutic strategies. This PPG will facilitate communication among PPG investigators and sharing of a rich collection of tools, transgenic/knockout mice and mAbs and Ig fusion proteins, to address these issues. The use of the same standardized reagents and experimental animals makes it possible to compare and contrast results in different microenvironments and disease models. There will be 3 Projects (Transplantation, Autoimmunity, Infection) and 3 Cores (Administrative, Antibody/lg fusion protein, Transgenic/Knockout). The """"""""Administrative Core"""""""" will be responsible for providing scientific direction and coordination, fiscal oversight and administrative support for the PPG. Overall, this PPG should provide fundamental knowledge for therapeutic manipulation of these important regulatory pathways.
}: These studies will provide the basis for understanding how, where and when costimulatory molecules regulate allograft rejection, organ-specific autoimmune diseases, and chronic viral infection These studies have implications for developing novel immunotherapies based on targeting costimulatory pathways for human chronic viral infections, cancer, autoimmune diseases and transplantation.
| Priyadharshini, Bhavana; Loschi, Michael; Newton, Ryan H et al. (2018) Cutting Edge: TGF-? and Phosphatidylinositol 3-Kinase Signals Modulate Distinct Metabolism of Regulatory T Cell Subsets. J Immunol 201:2215-2219 |
| Porichis, Filippos; Hart, Meghan G; Massa, Alexandra et al. (2018) Immune Checkpoint Blockade Restores HIV-Specific CD4 T Cell Help for NK Cells. J Immunol 201:971-981 |
| LaFleur, Martin W; Muroyama, Yuki; Drake, Charles G et al. (2018) Inhibitors of the PD-1 Pathway in Tumor Therapy. J Immunol 200:375-383 |
| Chaudhri, Apoorvi; Xiao, Yanping; Klee, Alyssa N et al. (2018) PD-L1 Binds to B7-1 Only In Cis on the Same Cell Surface. Cancer Immunol Res 6:921-929 |
| Ahn, Eunseon; Araki, Koichi; Hashimoto, Masao et al. (2018) Role of PD-1 during effector CD8 T cell differentiation. Proc Natl Acad Sci U S A 115:4749-4754 |
| Wu, Yongxia; Schutt, Steven; Paz, Katelyn et al. (2018) MicroRNA-17-92 is required for T-cell and B-cell pathogenicity in chronic graft-versus-host disease in mice. Blood 131:1974-1986 |
| Gartlan, Kate H; Bommiasamy, Hemamalini; Paz, Katelyn et al. (2018) A critical role for donor-derived IL-22 in cutaneous chronic GVHD. Am J Transplant 18:810-820 |
| Hippen, Keli L; Loschi, Michael; Nicholls, Jemma et al. (2018) Effects of MicroRNA on Regulatory T Cells and Implications for Adoptive Cellular Therapy to Ameliorate Graft-versus-Host Disease. Front Immunol 9:57 |
| Newton, Ryan H; Shrestha, Sharad; Sullivan, Jenna M et al. (2018) Maintenance of CD4 T cell fitness through regulation of Foxo1. Nat Immunol 19:838-848 |
| Owen, David L; Mahmud, Shawn A; Vang, Kieng B et al. (2018) Identification of Cellular Sources of IL-2 Needed for Regulatory T Cell Development and Homeostasis. J Immunol 200:3926-3933 |
Showing the most recent 10 out of 332 publications
