加快新抗原发现:一种高通量方法来识别免疫性标
Lena Pfitzer1, Gitta Boons1, Lien Lybaert1
1myNEO Therapeutics, 9000 Ghent, Belgium.
Vaccines
|August 28, 2025
概括
一种名为neoIM (新抗原免疫性) 的新工具可以准确预测T细胞对新抗原的反应,从而改善癌症免疫治疗点的选择. 这种方法超过了MHC结合亲和力预测,提高了临床试验抗原发现和免疫疗法的有效性.
科学领域:
- 计算免疫学
- 癌症免疫疗法
- 生物信息学
背景情况:
- 针对抗原的免疫疗法依赖于识别T细胞反应的免疫性表位.
- 目前以MHC结合亲和度为重点的方法产生高假阳性,限制了临床效用.
- 准确预测新抗原免疫性对于有效的癌症疫苗和治疗设计至关重要.
研究的目的:
- 开发一种新的计算工具,即新IM,用于高精度预测新抗原免疫性.
- 通过实验室和临床试验数据对新IM的性能进行评估.
- 评估neoIM作为预测检查点抑制剂治疗反应的生物标志物的潜力.
主要方法:
- 在MHC呈现的非自我上训练的随机森林分类器neoIM (n=61,829).
- 与现有工具在体外免疫性数据集 (ELISpot测试) 上评估新IM性能.
- 进行了临床试验数据的回顾性分析,以评估基于新IM的抗原选择及其与接受检查点抑制剂 (CPI) 治疗的黑色素瘤患者的整体存活率的相关性.
主要成果:
- neoIM在体外基准测试中显著优于现有工具,至少提高了30%的预测能力,并减少了虚假阳性.
- 在两个临床试验中,基于NeoIM的抗原选择确定了每位患者的临床可操作抗原多达50%.
- 在接受CPI治疗的黑色素瘤患者中,NeoIM得分与整体存活率存在相关性,这表明它作为预测生物标志物的潜力.
结论:
- NeoIM是第一个精确预测MHC结合性以外的表位免疫性计算工具.
- NeoIM能够更精确地发现新抗原和确定优先级,有可能加速下一代免疫疗法的开发.
- 该工具能够完善对检查点抑制治疗的反应预测,这凸显了评估新抗原免疫性的重要性.
相关概念视频
01:26Antigens Involved in Adaptive Immunity
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
01:29Pharmacogenomics: Identification of New Drug Targets
Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
01:25Rapid Identification of Pathogens
MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...