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TCR-like antibodies for HPV-induced cancer basic research and theranostics

用于 HPV 诱导的癌症基础研究和治疗诊断的 TCR 样抗体

基本信息

批准号：
9178025
负责人：
Roland K Strong
金额：
$ 44.23万
依托单位：
FRED HUTCHINSON CANCER RESEARCH CENTER
依托单位国家：
美国
项目类别：
财政年份：
2016
资助国家：
美国
起止时间：
2016-07-20 至 2020-06-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9178025
关键词：
Alleles Antibodies Antibody Affinity Antigen Presentation Antigen Targeting Antigens Anus Basic Cancer Research Basic Science Binding Biological Models Cancer Burden Cancer Etiology Cancer Patient Cancerous Cause of Death Cell Line Cell surface Cells China Chinese People Clinical Complex Cytotoxic agent Developing Countries Development Diagnosis Diagnostic Diagnostic Neoplasm Staging Disease Engineering Epitopes Future Goals HIV vaccine HLA-A gene HLA-A2 Antigen Human Human Herpesvirus 4 Human Papilloma Virus Vaccine Human Papillomavirus Human papilloma virus infection Immune system Incidence Infection Infection prevention Knowledge Lesion Ligands Literature MS4A1 gene Maintenance Major Histocompatibility Complex Malignant Neoplasms Malignant neoplasm of cervix uteri Mediating Metastatic/Recurrent Monoclonal Antibodies Nature Normal Cell Oncogenes Operative Surgical Procedures Oropharyngeal Patients Pattern Peptide/MHC Complex Peptides Preventive screening Process Protein Engineering Proteins Radiation therapy Reagent Recurrent Malignant Neoplasm Refractory Disease Sampling Series Specificity Staging Structure Surface T-Cell Receptor T-Lymphocyte Technology Therapeutic Therapeutic Effect Therapeutic antibodies Tumor Antigens Tumor-Derived Vaccination Vaccines Vagina Viral Vulva Woman Work abstracting base cancer cell cancer therapy clinical application cohort design experience feeding high throughput screening improved in vivo interest killings melanoma mortality neoplastic cell new technology novel patient population penis prevent receptor response theranostics tumor

项目摘要

Project Summary/Abstract The era of targeted anti-cancer therapies was ushered in by the development of therapeutic antibodies specific for antigens expressed primarily on tumors, improving the lives of countless cancer patients. Current antibodies, however, are limited to intact cell surface ligands, such as CD20, which are often also expressed on normal cells. However, methodological improvements have made it possible to produce antibodies specific for peptides from tumor antigens or viral oncoproteins presented in the context of major histocompatibility complex (MHC) class I proteins (in humans: HLA-A, -B, -C), which are often better restricted to tumor cells. These antibodies mimic how T cell receptors (TCR) recognize peptide/MHC complexes (pMHCs). These “TCR mimic” or mTCR antibodies combine the specificity of a TCR with the affinity of an antibody, allowing the targeting of antigens expressed by cancerous cells, while sparing normal cells. However, mTCR Abs are difficult to elicit, because of the precise nature of the target surface on a pMHC. The best current approaches require specialized high-throughput screening to isolate true mTCR antibodies. We will improve this developing technology by increasing the efficiency that mTCR antibodies can be generated in conventional monoclonal antibody facilities. We will accomplish this by engineering immunogens to focus responses to the desired target epitope surface, drawing on our previous experience with HIV vaccines. In order to fully develop and demonstrate our platform, we will focus on cancers caused by human papillomavirus (HPV) as a model system. The mTCR antibodies against HPV we will generate will be useful immediately for basic studies of HPV pMHC expression, and eventually as ex vivo and in vivo diagnostics, and for treatment of refractory disease. While the proximate goal of this project is to develop our mTCR Ab platform using HPV as a model system, our mTCR technology is completely generalizable to any application. HPV infection causes about 5% of all human cancers, and virtually all cervical cancers, but also provides well- defined antigens that can be targeted by mTCR antibodies. We plan to target the HPV E6/E7 oncoproteins responsible for the induction and maintenance of malignancy. We will validate these mTCR antibodies in a large cohort of patients with HPV-induced cervical cancers of known HPV strain and HLA allele usage through the FHCRC China initiative. The need for improved treatments for advanced cervical cancer in China is particularly great, because of limited access to preventative screening and HPV vaccines. This project will deliver (1) a novel technology for generating mTCR Abs against any desired pMHC target; (2) basic science on the presentation and expression patterns of HLA-restricted HPV E6/E7 epitopes; (3) crystal structures of novel MHC/HPV peptide complexes; and (4) a panel of biochemically-validated HPV mTCR Abs for immediate basic science applications and future development as clinical theranostics.

项目总结/文摘