Provided herein is a two-component photosensitizer, which demonstrated robust and selective killing effects for transfected HEK cells and affibody targeted A431 cancer cells when exposed to near infrared light excitation. Free MG2I is a pure and stable fluorogen; it is easy to synthesize and modify, and has no toxicity to cells. Unlike conventional photosensitizers, the dye and FAP itself has no photosensitizing effect until they are bound. Also unlike other activation methods, the activation step is achieved by adding the fluorogen, not the presence of the targeted molecule, requiring an 'active' activation instead of a 'passive' activation. This method offers the ability to locally switch-on and selective generation of singlet oxygen at the target site and can be used for a wide variety of molecular targets.
本文提供了一种双组分光敏剂,当暴露于近红外光激发下时,对转染的HEK细胞和affibody靶向的A431癌细胞表现出强大而选择性的杀伤作用。自由的MG2I是一种纯净稳定的荧光原料;易于合成和修改,并且对细胞没有毒性。与传统的光敏剂不同,
染料和FAP本身没有光敏效应,直到它们被结合起来。此外,与其他激活方法不同,激活步骤是通过添加荧光原料来实现的,而不是靶分子的存在,需要“主动”激活而不是“被动”激活。这种方法提供了在靶点位置局部开启和选择性产生单线态氧的能力,并可用于各种分子靶点。