具有高光动力功效和最小副作用的新型光敏剂(PSs)的开发在光动力疗法(PDT)中引起了极大的兴趣。在这项工作中,我们报道了几种吡啶嵌入的吩噻嗪鎓(pyridophenothiazinium)染料,可以在短短几个步骤内方便地合成它们,并且可以作为高效有效的PS,选择性地定位于溶酶体并光敏杀死癌细胞。其中,化合物5在光照射下具有促进细胞内活性氧(ROS)的能力的能力比亚甲基蓝(MB,一种基于吩噻嗪鎓的PS)几乎高40倍,具有显着的光疗指数( PI = 53.8)对抗HT29癌细胞,导致在异种移植小鼠模型中消除了大型实体瘤(〜300 mm3),而没有明显的副作用。
The present invention provides a novel phenothiazine-pyridine compound that is an effective photosensitizer useful for photodynamic therapy. Also provided is a method for inhibiting cell proliferation or for treating a disease involving inappropriate cell proliferation.
METHODS OF CHEMICAL SYNTHESIS OF DIAMINOPHENOTHIAZINIUM COMPOUNDS INVOLVING THE USE OF PERSULFATE OXIDANTS
申请人:Larch Christopher Paul
公开号:US20120058995A1
公开(公告)日:2012-03-08
This invention pertains generally to the field of chemical synthesis and purification, and more specifically to methods of synthesizing and purifying certain 3,7-diamino-phenothiazin-5-ium compounds (referred to herein as “diaminophenothiazinium compounds”) including Methylthioninium Chloride (MTC) (also known as Methylene Blue). In one embodiment, the e//i method comprises the steps of in order: a thiosulfonic acid formation (TSAF) as illustrated below, wherein the reaction is carried out in the presence of a thio sulfate and an oxidizing agent that is or comprises persulfate an oxidative coupling (OC); and a ring closure (RC). The resulting compounds and compositions comprising them (e.g., tablets, capsules) are useful in methods of medical treatment and diagnosis, etc., for example, tauopathies, or Alzheimer's disease (AD).
Development of new photosensitizers (PSs) with high photodynamic efficacy and minimal side effects is of great interest in photodynamictherapy (PDT). In this work, we reported several pyridine-embedded phenothiazinium (pyridophenothiazinium) dyes, which could be conveniently synthesized in a few short steps and acted as highly efficient and potent PSs to selectively localize to lysosomes and photosensitively
具有高光动力功效和最小副作用的新型光敏剂(PSs)的开发在光动力疗法(PDT)中引起了极大的兴趣。在这项工作中,我们报道了几种吡啶嵌入的吩噻嗪鎓(pyridophenothiazinium)染料,可以在短短几个步骤内方便地合成它们,并且可以作为高效有效的PS,选择性地定位于溶酶体并光敏杀死癌细胞。其中,化合物5在光照射下具有促进细胞内活性氧(ROS)的能力的能力比亚甲基蓝(MB,一种基于吩噻嗪鎓的PS)几乎高40倍,具有显着的光疗指数( PI = 53.8)对抗HT29癌细胞,导致在异种移植小鼠模型中消除了大型实体瘤(〜300 mm3),而没有明显的副作用。