Chemical Inhibition PTPN22 to boost anti-viral immunity

化学抑制 PTPN22 可增强抗病毒免疫力

• 批准号: 10844068
• 负责人: Robin C. Orozco
• 金额: $ 10.03万
• 依托单位: UNIVERSITY OF KANSAS LAWRENCE
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-11-29 至 2026-05-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10844068
• 关键词: Chemical; Inhibition; PTPN22; boost; anti

The overall goal of this project is to boost anti-viral immunity by inhibiting the protein tyrosine phosphatase non receptor 22 (PTPN22/Ptpn22) encoded enzyme Lyp (PEP in mice). Our hypothesis is that targeting Lyp/PEP C-terminal binding domain rather than the N-terminal enzymatic pocket will; 1- increase specificity and 2- chemically replicate the altered function caused by a commonly expressed PTPN22 allele (rs24766010), which causes an arginine (Arg) to tryptophan (Trp) amino acid substitution in the C-terminal region of Lyp/PEP and disrupts binding. In myeloid cells, N-terminal mutations rendering eenzymatically deadf Lyp/PEP compared to the health-relevant mutation in the C-terminal binding domain (rs24760010) can have different biological impact. We have previously shown that mice harboring this PEP Arg¨Trp Cterminal mutation have enhanced anti-viral immunity and can clear persistent virus infection. Now, we aim to therapeutically target PEP to achieve a comparable phenotype. This project utilizes the use of multiple CoBRE funded and non-CoBRE funded cores at the University of Kansas (KU). In brief, we will employ the protein production group to purify full length, N-terminal, and C- Terminal region of PEP. Then, the Infectious Disease Assay Development (IDAD) core will screen a compound library against these various PEP constructs. After identifying the compound of interest, this data will be submitted to the Computational Chemical Biology (CCB) core to computationally define these potential inhibitors. Further, the CCB core will work to rationally design a peptide based on the available structure of the P1 binding domain of PEP to binding partner Csk. Alongside these computational analyses, my lab will biologically validate the compounds evaluating anti-viral function in various immune cells, such as cytokine production, using spectral flow cytometry in the new Immunology Core. We will also molecularly assess the binding capacity of PEP to common protein partners. Future studies will submit the top compound(s) to the Synthetic Chemical Biology (SCB) core to be chemically stabilized and modified for in vivo experiments addressing anti-viral immunity. Discovery of such compounds results in a novel tool to further understand the role of Lyp/PEP during disease and potentially lead to a new therapeutic to better treat individualfs suffering from chronic infectious diseases.

该项目的总体目标是通过抑制蛋白酪氨酸磷酸酶来增强抗病毒免疫力