针对谷氨反应的叶酸向产药:针对瘤的PD-L1和CD47阻断
Jianfeng Wang1, Lianqi Liu1, Dian Xiao1
1Academy of Military Medical Sciences, Beijing 100850, China.
Molecules (Basel, Switzerland)
|November 13, 2025
概括
这项研究引入了一种新的抗体前药物策略,该策略使用叶酸向和瘤微环境激活来降低免疫检查点抑制剂的毒性. 新的前药有效向瘤,只在需要时释放活性抗体,消除非向效应.
科学领域:
- 生物技术和纳米医学
- 免疫学和癌症治疗疗法
- 药物输送系统 药物输送系统
背景情况:
- 针对PD-L1和CD47的免疫检查点抑制剂 (ICI) 是有希望的,但受到严重的目标外毒性限制.
- 现有的缓解毒性的前药物策略往往会损害抗体向能力.
- 存在对免疫治疗前期药物的需求,这些前期药物可以保持向特异性,同时减少全身副作用.
研究的目的:
- 开发和评估一种具有活性瘤向能力的新型抗体前药物策略 (FA-PEG-S-Ab).
- 创建特定的前药物,FA-PEG-S-Atz (PD-L1) 和FA-PEG-S-Hu5 (CD47),用于向癌症免疫疗法.
- 为了证明与传统ICI相比,新型前药的毒性降低和有效性保持.
主要方法:
- 用叶酸-PEG-二硫化物和PEG-二硫化物链接修改了抗体,以产生前体药物.
- 前代药物被设计用于向叶酸受体α (FRα) 和质 (GSH) 介导的激活瘤微环境 (TME).
- 在体外实验中评估了结合亲和力,抗体活性的掩盖/揭露以及血解毒性.
主要成果:
- 修改后的抗体前药物FA-PEG-S-Hu5对FRα显示出高亲和力 (KD = 4.02 × 10−9 M).
- 前药结合活性被有效地掩盖 (KD从1.05 × 10−11 M到2.10 × 10−8 M),并在GSH激活时恢复 (KD = 2.14 × 10−10 M).
- FA-PEG-S-Hu5完全消除了血液溶解毒性,显示出显著的安全性改善.
结论:
- "叶酸向输送+TME激活"前药物战略成功地创造了向和可激活的抗体治疗方法.
- 这种方法显著降低了与常规免疫检查点抑制剂相关的非目标毒性.
- 开发的前药物策略为更安全,更有效的癌症免疫疗法提供了一个有希望的新解决方案.
相关概念视频
Targeted Cancer Therapies
8.6K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
8.6K
Combination Therapies and Personalized Medicine
5.9K
Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
5.9K
Tumor Immunotherapy
1.7K
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
1.7K


![Automated Preparation of [68Ga]Ga-3BP-3940 on a Synthesis Module for PET Imaging of the Tumor Microenvironment](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F68356.jpg&w=3840&q=50)