An unexpected strategy to alleviate hypoxia limitation of photodynamic therapy by biotinylation of photosensitizers was written by An, Jing;Tang, Shanliang;Hong, Gaobo;Chen, Wenlong;Chen, Miaomiao;Song, Jitao;Li, Zhiliang;Peng, Xiaojun;Song, Fengling;Zheng, Wen-Heng. And the article was included in Nature Communications in 2022.Quality Control of 4-Chlororesorcinol The following contents are mentioned in the article:
The most common working mechanism of photodynamic therapy is based on high-toxicity singlet oxygen, which is called Type II photodynamic therapy. But it is highly dependent on oxygen consumption. Recently, Type I photodynamic therapy has been found to have better hypoxia tolerance to ease this restriction. However, few strategies are available on the design of Type I photosensitizers. We herein report an unexpected strategy to alleviate the limitation of traditional photodynamic therapy by biotinylation of three photosensitizers (two fluorescein-based photosensitizers and the com. available Protoporphyrin). The three biotiylated photosensitizers named as compound 1, 2 and 3, exhibit impressive ability in generating both superoxide anion radicals and singlet oxygen. Moreover, compound 1 can be activated upon low-power white light irradiation with stronger ability of anion radicals generation than the other two. The excellent combinational Type I / Type II photodynamic therapy performance has been demonstrated with the photosensitizers 1. This work presents a universal protocol to provide tumor-targeting ability and enhance or trigger the generation of anion radicals by biotinylation of Type II photosensitizers against tumor hypoxia. This study involved multiple reactions and reactants, such as 4-Chlororesorcinol (cas: 95-88-5Quality Control of 4-Chlororesorcinol).
4-Chlororesorcinol (cas: 95-88-5) belongs to organic chlorides. Organic chlorides can cause corrosion in pipelines, valves and condensers, and cause catalyst poisoning. The hydrocarbon processing industry (HPI) and others are affected by damage caused by these substances. Organochlorine compounds are lipophylic, meaning they are more soluble in fat than in water. This gives them a high tenancy to accumulate in the food chain (biomagnification).Quality Control of 4-Chlororesorcinol
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics