Novel RORg Agonists Enhance Anti-Tumor Activity of Adoptive T Cell Therapy
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1 Novel RORg Agonists Enhance Anti-Tumor Activity of Adoptive T Cell Therapy Jacques Moisan, Kinga Majchrzak, Xiao Hu, Rodney Morgan, Xikui Liu, Kellie Demock, Yahong Wang, Charles Lesch, Brian Sanchez, Richard Bousley, Clarke Taylor, Chad van Huis, Donald Skalitzky, Thomas Aicher, Peter Toogood, Weiping Zou, Gary Glick, Chrystal Paulos, Laura Carter May 2015
2 Type 17 T Cells Mediate Potent, Durable Anti-Tumor Responses Murine Transfer Model Human Transfer Model Ovarian Cancer Patients pmel-1 CD8 T cells + B16F10 Melanoma Th17 + Tc17 Meso CAR-T cells + M108 Tumor Correlation of RORg pathway with improved patient prognosis Blood , Sci Transl Med , 55ra78 Blood ,
3 RORgt is Master Transcription Factor for Type 17 T cells Can RORg agonists be used to enhance Type 17 responses and antitumor T cell responses? Transcription Factor agonist will activate genetic program Multiple mechanisms Not equivalent to overexpressing IL-17
4 Synthetic Agonists Enhance RORg Activity Gal4-RORg Reporter Cell Assay
5 Cytokine (ng/ml) RORg Agonists Enhance Cytokine Production by Murine Th17 and Tc17 Polarized T Cells CD4 T Cells Th17 conditions CD8 T Cells Tc17 conditions IL-17A IL-17F IL-22 GMCSF OT-I or OT-II splenocytes activated 4 days with peptide, IL-6, TGFb
6 % Cells RORg Agonists Enhance Cytokine Production by Unpolarized Murine T Cells Th0 Condition (IL-2) RORg-dependent Effect IL-17A IFNg IL17A DMSO Agonist DMSO Agonist 5 IL-17A Production from Th0 vs Th17 Cells 0 WT RORg (-/-) DMSO Agonist DMSO Agonist Trp-1 splenocytes activated 5 days with peptide B6 splenocytes activated 4 days with anti-cd3/cd28, IL-6, TGFb
7 % Change from DMSO RORg Agonists Shift the Balance of Co-stimulation over Co-inhibition PD1 CD160 CD73 CD27 CD28 CTLA4 PD1 TIGIT CD160 LAIR1 CD73 CD226 CD27 CD137 CD28 IL17A B6 splenocytes activated 4-5 days with anti-cd3/cd28, IL-6, TGFb +/- agonist flow cytometry, qpcr
8 RORg Agonists Desensitize Cells to PD-1 Checkpoint Inhibition RORg agonist Decreases PD-1 Expression and Percentage PD-1+ Cells RORg Agonist Desensitizes Cells to PD-L1 Inhibition of Proliferation 2º Stimulation (anti-cd3) Similar restoration of cytokine production observed (IL-17, IFNg) OT-I splenocytes activated 4 days with peptide, IL-6, TGFb +/-agonist; washed, rested then restimulated for 6 days
9 EG7 Tumor Growth is Inhibited Following Adoptive Transfer of RORg Agonist Treated Tc17 Cells Significant inhibition of tumor growth and improved survival
10 Adoptive Cell Therapy Model pmel-1 CD8 or TRP-1 CD4 + T cells n (1e6) IL-2 IL-6, TGF-b, IL-21, IL-1B Anti-IFN/4 Th0 Th17 B16F10 *most challenging line of melanoma to treat. Treat post 10 days of development Dr Chrystal Paulos, Dr Kinga Majchrzak Medical University of South Carolina
11 Percent survival Tumor Volume (mm2) RORg Agonist Improves Effectiveness of Transferred T Cells vs Established B16F10 Tumors Trp-1 CD4 Th17 cells PMEL-1 CD8 Tc17 cells Trp-1 CD4 Th0 cells No Cells Th17 Th17 + Agonist Days No Cells Tc17 Tc17 + Agonist Days No Cells Th0 Th0 + Agonist Days Days Days Days Dr Chrystal Paulos, Dr Kinga Majchrzak Medical University of South Carolina
12 Percent survival Tumor Volume (mm2) % type 17 in the tumor RORg Agonist Improves Effectiveness of co-transferred CD4+ CD8+ T Cells vs Established B16F10 Tumors Trp-1 Th17 + pmel-1 Tc17 Tumor-specific TIL Day No Cells Th17 + Tc17 Th17 + Tc17 + Agonist Days 1 0 Th17 Tc17 Enhanced persistence of agonist treated cells in tumor draining lymph node and spleen Days Dr Chrystal Paulos, Dr Kinga Majchrzak Medical University of South Carolina
13 RORg Agonist Treated Cells Maintain Enhanced Cytokine Production 71 Days After Transfer Splenocytes (day 71) ex vivo Trp-1 Stimulation of CD4 T cells Similar data observed for IL-2 and IL-21 and for pmel-1 CD8 T cells Dr Chrystal Paulos, Dr Kinga Majchrzak Medical University of South Carolina
14 Increased PD-1-Negative TILs in Mice Receiving Agonist Treated Th17 + Tc17 Cells Trp-1 CD4 pmel-1 CD8 Th17 + Tc17 Day 71 Th17 + Tc17 +Agonist Dr Chrystal Paulos, Dr Kinga Majchrzak Medical University of South Carolina
15 Systemic Administration of RORg Agonist Effective Against Established MC38 Colon Carcinoma Inject tumor cells (SC) 3-7 days Begin daily days dosing Tumor Volume Tumor Growth Control Improved Survival Increased plasma cytokines agonist
16 RORg Agonists Increase production of pro-inflammatory cytokines and chemokines Increase co-stimulatory and decrease co-inhibitory receptor expression Desensitize cells to PD-L1-medidated inhibition Decrease Treg development Addition of RORg agonists to in vitro T cell expansion cultures significantly enhances anti-tumor responses Effective in CD4 and CD8 model systems Effective with Type17 cytokine cocktails or IL-2 Observe long-lasting effects consistent with RORg biology
17 Thank You! Jacques Moisan Xiao Hu Rodney Morgan Xikui Liu Kellie Demock Yahong Wang Charles Lesch Brian Sanchez Richard Bousley Clarke Taylor Chad van Huis Donald Skalitzky Thomas Aicher Peter Toogood Gary Glick Medical University of South Carolina Kinga Majchrzak Chrystal Paulos University of Michigan Weiping Zou
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