通过使用功能片段进行强化学习来改进共价和非共价分子生成
Yongrui Wang1,2, Zhen Wang1, Yanjun Li3
1Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310018, China.
Journal of chemical information and modeling
|June 5, 2025
概括
我们开发了MOFF,这是一种新的AI框架,用于设计使用功能碎片的新抗癌分子. 这种方法产生具有有前途的特性的共价和非共价候选药物.
科学领域:
- 计算化学和药物发现
- 医药化学中的人工智能
背景情况:
- 小分子药物通过抑制关键信号通路对向癌症治疗至关重要.
- 现有的药物发现深度学习模型缺乏基于片段的*de novo*共价分子设计的生成框架.
研究的目的:
- 引入MOFF (具有功能片段的分子生成),用于*de novo*分子生成的强化学习框架.
- 用基于片段的方法设计共价和非共价化合物.
主要方法:
- MOFF采用强化学习策略,特别是软行为者-批评算法.
- 对接分数被用作奖励函数来指导分子生成.
- 该框架通过针对布鲁顿氨酸激酶 (BTK) 和表皮生长因子受体 (EGFR) 的案例研究来评估.
主要成果:
- MOFF成功地产生了具有良好的对接分数和药物样性质的联结体样分子.
- 产生的分子表现优于基线模型和来自ChEMBL的现有化合物.
- 分子动力学模拟证实了精选的最高分数分子的潜在结合稳定性.
结论:
- MOFF为基于碎片的分子生成提供了一个灵活和可扩展的框架.
- 开发的模型显示了在癌症治疗中*de novo*药物设计的发展潜力.
- 这种方法可以支持药物发现中的各种下游应用.
相关概念视频
Reinforcement
354
Positive and negative reinforcement are key concepts in operant conditioning, a learning process where the consequences of a behavior affect the likelihood of that behavior being repeated.
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
354
Reinforcement Schedules
243
Positive reinforcement is a powerful method for teaching new behaviors to both animals and humans. B.F. Skinner demonstrated this with his experiments using rats in a Skinner box. When a rat pressed a lever, it received a food pellet. This immediate reward encouraged the rat to repeat the behavior. This method, where a reward follows every instance of the behavior, is known as continuous reinforcement. It is highly effective for establishing new behaviors quickly.
Once a behavior is learned,...
Once a behavior is learned,...
243
Associative Learning
605
Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
Classical conditioning, also known...
Classical conditioning, also known...
605
Predicting Reaction Outcomes
8.7K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
8.7K
Molecular Models
40.8K
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
40.8K
Observational Learning
321
Albert Bandura's observational learning, also known as imitation or modeling, occurs when a person observes and imitates another's behavior. It is a quicker process than operant conditioning. A well-known example is the Bobo doll study, where children who saw an adult acting aggressively towards the doll were more likely to act aggressively when left alone, compared to those who observed a nonaggressive adult. Many psychologists view observational learning as a form of latent learning...
321


