Novel GvHD-Specific Gene Identification for Optimal Control of GvHD

用于最佳控制 GvHD 的新型 GvHD 特异性基因鉴定

• 批准号: 10408858
• 负责人: Jaebok Choi
• 金额: $ 23.63万
• 依托单位: WASHINGTON UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-05-21 至 2024-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10408858
• 关键词: Allogenic; Animal Model; Aplastic Anemia; B-Cell Lymphomas; CRISPR library; CRISPR/Cas technology; Cell Transplantation; Clinical; Complication; Data; Disease; Dysmyelopoietic Syndromes; FGFR3 gene; Failure; Gene Targeting; Genes; Genetic; Goals; Graft-Versus-Tumor Induction; Guide RNA; HLA Antigens; Hematologic Neoplasms; Human; Immunologics; Immunosuppression; Inbred BALB C Mice; Inflammatory; Inflammatory Bowel Diseases; Intestines; Link; Liver; Lymphoma cell; Marrow; Mature T-Lymphocyte; Mediating; Modeling; Molecular Target; Mus; Nodule; Organ; Pathway interactions; Patients; Peripheral Blood Mononuclear Cell; Pharmacology; Prevention; Psoriatic Arthritis; RNA library; Refractory; Relapse; Rheumatoid Arthritis; Risk; Skin; Solid; Spleen; T-Lymphocyte; Testing; Therapeutic; Time; Transplant Recipients; Transplantation; cancer immunotherapeutics; cancer therapy; cell mediated immune response; chimeric antigen receptor; curative treatments; effective therapy; genome-wide; graft vs host disease; graft vs leukemia effect; hematopoietic cell transplantation; immunoreaction; immunoregulation; improved; improved outcome; insight; leukemia; lymph nodes; mouse model; negative affect; new therapeutic target; next generation sequencing; novel; novel therapeutics; organ transplant rejection; preservation; prevent; subcutaneous; success; therapeutic development; tumor

ABSTRACT Graft-versus-host disease (GvHD) is one of the most significant barriers to success for allogeneic hematopoietic cell transplantation (allo-HCT). The goal of this project is to identify novel genes whose genetic/pharmacologic blockade may selectively prevent GvHD while maintaining or enhancing anti-leukemia activities (aka graft- versus-leukemia or GvL effect). Allo-HCT remains the most effective treatment for patients with hematologic malignancies, as the therapeutic benefit of allo-HCT is primarily derived from GvL. However, allo-HCT also carries the risk that the donor T cells in the transplant (graft) will become overzealous and begin to attack not only the leukemia but also the patient's skin, intestines and liver, resulting in GvHD. Because of a strong association between the two donor T cell-mediated immune responses, specifically limiting GvHD remains the goal of allo-HCT. Managing the threat of GvHD would broaden the scope and benefit of allo-HCT. Several groups, including ours, have proposed therapeutic strategies to reduce GvHD without abrogating the beneficial GvL effect in animal models and human patients. However, the mechanisms by which allogeneic donor T cells differentially modulate GvHD and GvL remain largely unknown. This gap in our mechanistic understanding hinders our ability to specifically prevent/treat GvHD. We hypothesize that the genes we identify as being differentially associated with donor T cells that infiltrate tumors versus GvHD organs will be critical targets for the prevention of GvHD without negatively affecting GvL. To this end, we performed an unbiased genome-wide CRISPR/Cas9 library screen. As a result, we have for the first time identified 487 novel GvHD-associated genes that could potentially serve as molecular targets in GvHD, as the guide RNAs for these genes were enriched only in T cells obtained from tumor nodules but not from any GvHD target organs. We found that five sets of genes that are involved in known pathways are most significantly enriched in these 487 genes. All of these five pathways are closely linked to the RELN-RAP1-FGFR3 axis that has not been actively investigated in the allo- HCT field. Thus, we will determine if genetic/pharmacologic inhibition of the RELN-RAP1-FGFR3 axis results in GvHD-specific immune modulation while maintaining or enhancing GvL in our mouse models of murine GvHD/GvL and human PBMC/T cell-mediated xeno-GvHD/GvL. If successful, our findings of novel therapeutic targets to selectively and optimally control GvHD will be potential game-changers. Our proposed studies will provide significant mechanistic insights into GvHD and its prevention, which may have transformative implications for therapeutic development not only for solid organ transplant rejection but also inflammatory diseases such as inflammatory bowel disease, psoriasis and rheumatoid arthritis. In addition, our studies may also help improve the efficacies of anti-cancer therapies and immunotherapeutic approaches .

摘要