光药理学可以通过光控制分子配置来调节药物活性的方式实施。本文报道了在GABAR和nAChR的一个或两个位点上结合的三种光致变色配体(PCL)。这些多光子PCLs,包括FIP-AB-FIP,IMI-AB-FIP,和IMI-AB-IMI,用共价连接两个氟虫腈(FIP)和吡虫啉(IMI)分子的偶氮苯(AB)桥构建。有趣的是,三种PCL以及FIP和IMI对白纹伊蚊幼虫和蚜虫均表现出良好的杀虫活性。两种反式/顺式异构体中的IMI-AB-FIP可以根据光可逆地相互转化,伴随着杀虫活性降低或增加1.5-2.3倍。此外,IMI-AB-FIP对A.craccivora显示出协同作用(LC50,IMI-AB-FIP=14.84-22.10μM,LC50,IMI-AB-IMI=210.52-266.63μM,LC50和FIP-AB-FIP=36.25-51.04μM),主要是由于同时靶向GABAR和nAChR的一个可能的原因。此外,进行了摇摆者游泳行为和蟑螂神经元功能的调节,结果间接证明了配体-受体相互作用。换句话说,受体和昆虫行为的实时调节可以通过我们使用光的双光子PCL在时空上实现。
Photopharmacology can be implemented in a way of regulating drug activities by light-controlling the molecular configuations. Three photochromic ligands (PCLs) that bind on one or two sites of GABARs and nAChRs were reported here. These
multiphoton PCLs, including FIP-AB-FIP, IMI-AB-FIP, and IMI-AB-IMI, are constructed with an azobenzene (AB) bridge that covalently connects two fipronil (FIP) and imidacloprid (IMI) molecules. Interestingly, the three PCLs as well as FIP and IMI showed great insecticidal activities against Aedes albopictus larvae and Aphis craccivora. IMI-AB-FIP in both trans/cis isomers can be reversibly interconverted depending on light, accompanied by insecticidal activity decrease or increase by 1.5-2.3 folds. In addition, IMI-AB-FIP displayed synergistic effects against A. craccivora (LC50, IMI-AB-FIP = 14.84-22.10 μM, LC50, IMI-AB-IMI = 210.52-266.63 μM, LC50, and FIP-AB-FIP = 36.25-51.04 μM), mainly resulting from a conceivable reason for simultaneous targeting on both GABARs and nAChRs. Furthermore, modulations of wiggler-swimming behaviors and cockroach neuron function were conducted and the results indirectly demonstrated the ligand-receptor interactions. In other words, real-time regulations of receptors and insect behaviors can be spatiotemporally achieved by our two-photon PCLs using light.