Compositions comprising an active oxygen-responsive antioxidant crystal, methods of making them, and methods for controlling the dissolution rate and/or altering the crystallization behavior of an antioxidant are disclosed. The crystals comprise an antioxidant and a disulfide- or diselenide-crosslinked polymer that is adsorbed onto a surface of the antioxidant. Upon exposure to an active-oxygen stimulus, the polymer de-crosslinks to release the antioxidant from the composition in an amount effective to counteract the stimulus. While prior approaches to altering dissolution rates have relied on passive zero- or first-order kinetics that are independent of ROS levels, the inventive compositions actively respond by releasing antioxidant in an amount proportional to the concentration of active-oxygen species present. The crystallization methods are simple and scalable. The antioxidant balances ROS concentration and allows formulators of nutritional supplements, drug therapies, and other applications to more effectively use antioxidants while avoiding undesirable levels of antioxidative stress.
                            揭示了包括活性氧响应抗氧化晶体的组合物、制备它们的方法以及控制
抗氧化剂的溶解速率和/或改变其结晶行为的方法。这些晶体包括
抗氧化剂和吸附在
抗氧化剂表面的二
硫化物或二
硒化物交联聚合物。在暴露于活性氧刺激时,聚合物会解除交联以释放
抗氧化剂,其量足以抵消刺激。虽然以往改变溶解速率的方法依赖于被动的零阶或一阶动力学,与ROS
水平无关,但这些创新的组合物通过释放与活性氧物种浓度成比例的
抗氧化剂来积极响应。结晶方法简单且可扩展。
抗氧化剂平衡ROS浓度,使营养补充剂、药物疗法和其他应用的配方制造者能更有效地使用
抗氧化剂,同时避免不良
水平的抗氧化应激。